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You searched for: Subject term aluminum oxide Remove constraint Subject term: aluminum oxide Subject term chemical reactions Remove constraint Subject term: chemical reactions
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1. A New Method for Purifying Fat-Containing Extracts in the Determination of Polybrominated Diphenyl Ethers

Author:
A. A. Shelepchikov; V. V. Ovcharenko; A. I. Kozhushkevich; E. S. Brodskii; A. A. Komarov; K. A. Turbabina; A. M. Kalantaenko
Source:
Journal of analytical chemistry 2019 v.74 no.6 pp. 574-583
ISSN:
1061-9348
Subject:
aluminum oxide; animal fats and oils; bromine; chemical reactions; feeds; foods; fractionation; gas chromatography; physicochemical properties; polybrominated diphenyl ethers; polychlorinated biphenyls; potassium silicates; quality control; silica; solvents; sulfuric acid; tandem mass spectrometry; vegetable oil
Abstract:
... We developed a sample preparation method for the determination of polybrominated diphenyl ethers (PBDEs) with from one to ten bromine atoms in samples of feed and food products containing approximately 0.5 g of animal fat or vegetable oil. The method involves gas chromatography with high-resolution mass spectrometry or tandem mass spectrometry. A possibility of using various reagents for the purif ...
DOI:
10.1134/S1061934819040130

2. A facile route to fabrication of inorganic–small organic molecule cable-like nanocomposite arrays

Author:
Xiujuan Zhang; Weigang Ju; Mingming Gu; Xiangmin Meng; Wensheng Shi; Xiaohong Zhang; Shuittong Lee
Source:
Chemical communications 2005 v. no.33 pp. 4202-4204
ISSN:
1364-548X
Subject:
aluminum oxide; ambient temperature; aqueous solutions; chemical reactions; nanocomposites; nanosilver; nanotubes; nanowires; organic matter; silver
Abstract:
... A novel and facile method is reported for the preparation of silver iodide–small organic molecule (SOM) cable-like nanocomposites arrays, which involved first the fabrication of SOM nanotubes inside an anodic aluminium oxide (AAO) membrane, and then using the SOM nanotubes in AAO as secondary template to prepare the AgI nanowires in aqueous solution at room temperature. ...
DOI:
10.1039/b506459g

3. A facile synthesis of cubic (Im3̄m) alumina films on glass with potential catalytic activity

Author:
Anuradha Mitra; Debrina Jana; Goutam De
Source:
Chemical communications 2012 v.48 no.27 pp. 3333-3335
ISSN:
1364-548X
Subject:
aluminum oxide; catalytic activity; chemical communication; chemical reactions; films (materials); glass; nanogold; porous media; thermal stability
Abstract:
... Thermally stable phase pure mesoporous cubic (Im3̄m) alumina films were synthesized on glass substrates under ambient conditions. These cubic alumina films incorporated with Au NPs exhibited excellent catalytic property. ...
DOI:
10.1039/c2cc18053g

4. A fumed alumina induced gel-like electrolyte for great performance improvement of lithium–sulfur batteries

Author:
Bin Lei; Jun Yang; Zhixin Xu; Shasha Su; Dong Wang; Jinhua Jiang; Jing Feng
Source:
Chemical communications 2018 v.54 no.96 pp. 13567-13570
ISSN:
1364-548X
Subject:
aluminum oxide; anodes; batteries; chemical reactions; electrolytes; energy; lithium
Abstract:
... The practical application of high energy lithium–sulfur batteries is still limited by unstable lithium anodes and the shuttle effect of polysulfides. Herein, a gel-like electrolyte induced by fumed alumina is proposed for dendrite-free Li deposition, lower over-potential and better cycle stability. Li–S@pPAN cells with the proposed electrolyte exhibit outstanding cycle stability and rate performan ...
DOI:
10.1039/c8cc07741j

5. A highly N-doped carbon phase “dressing” of macroscopic supports for catalytic applications

Author:
Housseinou Ba; Yuefeng Liu; Lai Truong-Phuoc; Cuong Duong-Viet; Xiaoke Mu; Won Hui Doh; Tung Tran-Thanh; Walid Baaziz; Lam Nguyen-Dinh; Jean-Mario Nhut; Izabela Janowska; Dominique Begin; Spiridon Zafeiratos; Pascal Granger; Giulia Tuci; Giuliano Giambastiani; Florian Banhart; Marc J. Ledoux; Cuong Pham-Huu
Source:
Chemical communications 2015 v.51 no.76 pp. 14393-14396
ISSN:
1364-548X
Subject:
aluminum oxide; carbon; catalysts; catalytic activity; chemical reactions; environmental protection; food processing; porous media; raw materials; renewable energy sources
Abstract:
... The straightforward “dressing” of macroscopically shaped supports (i.e. β-SiC and α-Al₂O₃) with a mesoporous and highly nitrogen-doped carbon-phase starting from food-processing raw materials is described. The as-prepared composites serve as highly efficient and selective metal-free catalysts for promoting industrial key-processes at the heart of renewable energy technology and environmental prote ...
DOI:
10.1039/c5cc05259a

6. A hybrid zeolitic imidazolate framework membrane by mixed-linker synthesis for efficient CO₂ capture

Author:
Chunjuan Zhang; Yuanlong Xiao; Dahuan Liu; Qingyuan Yang; Chongli Zhong
Source:
Chemical communications 2012 v.49 no.6 pp. 600-602
ISSN:
1364-548X
Subject:
aluminum oxide; carbon dioxide; chemical reactions; permeability
Abstract:
... A ZIF-9-67 hybrid membrane on α-Al₂O₃ support was prepared using mixed-linker synthesis. The gas permeation and selectivity data demonstrate that this membrane may have potential applications for efficient CO₂ capture from several industrial mixtures. ...
DOI:
10.1039/c2cc37621k

7. A metal–organic framework/α-alumina composite with a novel geometry for enhanced adsorptive separation

Author:
Chenghong Wang; Melanie Lee; Xinlei Liu; Bo Wang; J. Paul Chen; Kang Li
Source:
Chemical communications 2016 v.52 no.57 pp. 8869-8872
ISSN:
1364-548X
Subject:
adsorbents; adsorption; aluminum oxide; arsenic; chemical reactions; coordination compounds; drinking water; geometry; water pollution
Abstract:
... The development of a metal–organic framework/α-alumina composite leads to a novel concept: efficient adsorption occurs within a plurality of radial micro-channels with no loss of the active adsorbents during the process. This composite can effectively remediate arsenic contaminated water producing potable water recovery, whereas the conventional fixed bed requires eight times the amount of active ...
DOI:
10.1039/c6cc02317g

8. A mild and efficient protocol for the ipso-hydroxylation of arylboronic acids

Author:
Ankur Gogoi; Utpal Bora
Source:
Tetrahedron letters 2013 v.54 pp. 1821-1823
ISSN:
0040-4039
Subject:
aluminum oxide; catalysts; chemical reactions; chemical structure; hydrogen peroxide; oxidants; phenols
Abstract:
... An ipso-hydroxylation of arylboronic acids to phenols using aqueous H2O2 as oxidant and acidic alumina as catalyst has been reported in this study. The reusability of the catalyst is also investigated. ...
DOI:
10.1016/j.tetlet.2013.01.079

9. A molding method of Na2CO3/Al2O3 sorbents with high sphericity and low roughness for enhanced attrition resistance in CO2 sorption/desorption process via extrusion-spheronization method

Author:
Wei Liu; Ye Wu; Tianyi Cai; Zhikang Xu; Daoyin Liu; Jiliang Ma; Xiaoping Chen; Dong Liu
Source:
Powder technology 2020 v.366 pp. 520-526
ISSN:
0032-5910
Subject:
aluminum oxide; carbon dioxide; cellulose; chemical reactions; industrial applications; particle size; roughness; sodium carbonate; sorbents; temperature
Abstract:
... Using sodium-based sorbents for capturing CO₂ is considered an effective and promising method for industry application. However, the attrition problem and how to improve the attrition resistance of sorbents are still unclear thus inhibiting the development of this technology. This paper was desired to address this problem. Multi-factors, including particle size, roughness, sphericity, fluidization ...
DOI:
10.1016/j.powtec.2020.03.007

10. A new type of nonsulfide hydrotreating catalyst: nickel phosphide on carbon

Author:
Yuying Shu; S. Ted Oyama
Source:
Chemical communications 2005 v. no.9 pp. 1143-1145
ISSN:
1364-548X
Subject:
X-ray absorption spectroscopy; X-ray diffraction; aluminum oxide; carbon; catalysts; chemical reactions; nickel; phosphides; sulfur
Abstract:
... Nickel phosphide on carbon is successfully synthesized by temperature-programmed reduction as verified with X-ray diffraction and extended X-ray absorption fine structure measurements; it shows superior activity, selectivity, and stability for sulfur removal from the refractory compound 4,6-dimethyldibenzothiophene with a steady-state conversion of 99%, which is much higher than that of a commerci ...
DOI:
10.1039/b415838e

11. A novel 3D covalent organic framework membrane grown on a porous α-Al₂O₃ substrate under solvothermal conditions

Author:
Hui Lu; Chang Wang; Juanjuan Chen; Rile Ge; Wenguang Leng; Bin Dong; Jun Huang; Yanan Gao
Source:
Chemical communications 2015 v.51 no.85 pp. 15562-15565
ISSN:
1364-548X
Subject:
aluminum oxide; ceramics; chemical reactions; nanopores; permeability
Abstract:
... A novel approach to grow a 3D COF-320 membrane on a surface-modified porous α-Al₂O₃ substrate is developed. A compact and uniform COF-320 membrane with a layer thickness of ∼4 μm is obtained. This is the first reported 3D COF functional membrane fabricated successfully on a common porous α-Al₂O₃ ceramic support. The gas permeation results indicate that the gas transport behavior is mainly governed ...
DOI:
10.1039/c5cc06742a

12. A novel catalyst for hydrazine decomposition: molybdenum carbide supported on γ-Al₂O₃

Author:
Xiaowei Chen; Tao Zhang; Pinliang Ying; Mingyuan Zheng; Weicheng Wu; Liangen Xia; Tao Li; Xiaodong Wang; Can Li
Source:
Chemical communications 2002 v. no.3 pp. 288-289
ISSN:
1364-548X
Subject:
aluminum oxide; catalysts; catalytic activity; chemical reactions; hydrazine; iridium; molybdenum
Abstract:
... An alumina-supported Mo₂C catalyst is found to be as active as a conventionally used Ir/γ-Al₂O₃ catalyst for catalytic decomposition of hydrazine tested in a monopropellant thruster. ...
DOI:
10.1039/b109400a

13. A novel dimethylformamide (DMF) free bar-cast method to deposit organolead perovskite thin films with improved stability

Author:
Eurig W. Jones; Peter J. Holliman; Arthur Connell; Matthew L. Davies; Jennifer Baker; Robert J. Hobbs; Sanjay Ghosh; Leo Furnell; Rosie Anthony; Cameron Pleydell-Pearce
Source:
Chemical communications 2016 v.52 no.23 pp. 4301-4304
ISSN:
1364-548X
Subject:
aluminum oxide; chemical reactions; crystals; dimethylformamide; humidity; nanoparticles; solvents; terpineol; titanium dioxide; toxicity
Abstract:
... We report a solvent-free approach to synthesizing organolead perovskites by using solid state reactions to coat perovskite crystals onto Al₂O₃ or TiO₂ nanoparticles followed by addition of terpineol affording perovskite inks. We have bar cast these inks to produce photoactive perovskite thin films which are significantly more stable to humidity than solution-processed films. This new method also a ...
DOI:
10.1039/c5cc09859a

14. A novel p-type and metallic dual-functional Cu–Al₂O₃ ultra-thin layer as the back electrode enabling high performance of thin film solar cells

Author:
Qinxian LinQinxian Lin, Yantao Su and Ming-Jian Zhang contributed equally to this work.; Yantao Su; Ming-Jian Zhang; Xiaoyang Yang; Sheng Yuan; Jiangtao Hu; Yuan Lin; Jun Liang; Feng Pan
Source:
Chemical communications 2016 v.52 no.71 pp. 10708-10711
ISSN:
1364-548X
Subject:
aluminum oxide; chemical reactions; copper; electrodes; solar cells
Abstract:
... Increasing the open-circuit voltage (Vₒc) along with the fill factor (FF) is pivotal for the performance improvement of solar cells. In this work, we report the design and construction of a new structure of CdS/CdTe/Al₂O₃/Cu using the atomic layer deposition (ALD) method, and then we control Cu diffusion through the Al₂O₃ atomic layer into the CdTe layer. Surprisingly, this generates a novel p-typ ...
DOI:
10.1039/c6cc04299f

15. A novel route for in-situ H₂O₂ generation from selective reduction of O₂ by hydrazine using heterogeneous Pd catalyst in an aqueous medium

Author:
Vasant R. Choudhary; Chanchal Samanta; Prabhas Jana
Source:
Chemical communications 2005 v. no.43 pp. 5399-5401
ISSN:
1364-548X
Subject:
aluminum oxide; anions; atmospheric pressure; byproducts; catalysts; chemical reactions; hydrazine; hydrogen peroxide; nitrogen; oxygen; palladium; protons
Abstract:
... Hydrogen peroxide in high yields can be generated with high efficiency at mild conditions (25 °C and atmospheric pressure) with the formation of only environment-friendly by-products (N₂ and H₂O) by a reduction of O₂ by hydrazine from its hydrate/salt with its complete conversion in a short reaction period (≤0.5 h) using a easily separable supported Pd catalyst (Pd/Al₂O₃, Pd/Ga₂O₃ or Pd/C) in an a ...
DOI:
10.1039/b510543a

16. A one-pot synthesis of 3-nitrothiophene and 3-nitro-2-substituted thiophenes

Author:
Neasa McNabola; Cornelius J. O'Connor; Mark D. Roydhouse; Michael D. Wall; J. Mike Southern
Source:
Tetrahedron 2015 v.71 pp. 4598-4603
ISSN:
0040-4020
Subject:
aluminum oxide; chemical reactions; chemical structure; chromatography; sieves; silica gel; synthesis; thiophenes; triethylamine
Abstract:
... A one-pot approach to the synthesis of 3-nitrothiophene and 3-nitro-2-substituted thiophenes has been developed. Exposure of 1,4-dithane-2,5-diol to nitroacetates or nitroalkenes in the presence of 25% triethylamine and subsequent treatment with molecular sieves and combinations of silica gel or acidic alumina with DDQ or chloranil formed 3-nitrothiophene or a number of 3-nitro-2-substituted thiop ...
DOI:
10.1016/j.tet.2015.05.032

17. A rationally designed CuFe₂O₄–mesoporous Al₂O₃ composite towards stable performance of high temperature water–gas shift reaction

Author:
Vijayanand Subramanian; Edwin S. Gnanakumar; Dae-Woon Jeong; Won-Bi Han; Chinnakonda S. Gopinath; Hyun-Seog Roh
Source:
Chemical communications 2013 v.49 no.96 pp. 11257-11259
ISSN:
1364-548X
Subject:
aluminum oxide; catalysts; chemical communication; chemical reactions; nanocomposites; synthesis gas; temperature; wastes
Abstract:
... High temperature water–gas shift reaction was demonstrated for the first time on a CuFe₂O₄–mesoporous alumina nanocomposite between 350 and 550 °C with 70–80% CO-conversion using simulated waste derived syngas under realistic conditions. Despite high Al-content, the catalyst exhibited stable activity, which was attributed to the nano-architectured robust porous nature of alumina integrated with su ...
DOI:
10.1039/c3cc43699c

18. A simple conversion of azlactones into indenones via H₃PW₁₂O₄₀/Al₂O₃ catalyzed intramolecular Friedel–Crafts reaction

Author:
Mahboubeh Rostami; Ahmad R. Khosropour; Valiollah Mirkhani; Majid Moghadam; Shahram Tangestaninejad; Iraj Mohammadpoor-Baltork
Source:
Tetrahedron letters 2011 v.52 no.52 pp. 7149-7152
ISSN:
0040-4039
Subject:
aluminum oxide; benzamides; catalysts; chemical reactions; chemical structure; filtration; microwave radiation; synthesis
Abstract:
... A rapid and simple procedure for the synthesis of the indenone derivatives, N-(1-oxo-1H-inden-2-yl)benzamides, via intramolecular Friedel–Crafts (IFC) reaction of (Z)-4-arylidene-2-phenyl-5(4)-oxazolones (azlactones) catalyzed by H₃PW₁₂O₄₀ supported on neutral alumina under microwave irradiation has been developed. The reaction is straightforward and allows easy isolation of the product. The catal ...
DOI:
10.1016/j.tetlet.2011.10.120

19. A unique microwave effect on the microstructural modification of Cu/ZnO/Al₂O₃ catalysts for steam reforming of methanol

Author:
Xin-Rong Zhang; Lu-Cun Wang; Yong Cao; Wei-Lin Dai; He-Yong He; Kang-Nian Fan
Source:
Chemical communications 2005 v. no.32 pp. 4104-4106
ISSN:
1364-548X
Subject:
aluminum oxide; catalysts; chemical reactions; copper; cupric oxide; hydrogen production; methanol; microwave radiation; steam; zinc oxide
Abstract:
... A short time (3–10 min) of microwave irradiation on the CuO/ZnO/Al₂O₃ oxide precursor can result in a unique tailored microstructural modification on the catalyst, leading to a significantly enhanced performance for H₂ production from steam reforming of methanol. ...
DOI:
10.1039/b502997j

20. A “non-sticky” superhydrophobic surface prepared by self-assembly of fluoroalkyl phosphonic acid on a hierarchically micro/nanostructured alumina gel film

Author:
Wei Ma; Hui Wu; Yuji Higaki; Hideyuki Otsuka; Atsushi Takahara
Source:
Chemical communications 2012 v.48 no.54 pp. 6824-6826
ISSN:
1364-548X
Subject:
aluminum oxide; chemical communication; chemical reactions; gels; hydrophobicity; phosphorous acid; sol-gel processing
Abstract:
... A hierarchically micro/nanostructured alumina gel film was prepared by using a simple sol–gel process; upon self-assembly of fluoroalkyl phosphonic acid, a “non-sticky” superhydrophobic surface was obtained. ...
DOI:
10.1039/c2cc32513f

21. Activating 2D nano-kaolinite using hybrid nanoparticles for enhanced phosphate capture

Author:
Yanfu Wei; Peng Yuan; Yaran Song; Dong Liu; Dusan Losic; Daoyong Tan; Fanrong Chen; Hongchang Liu; Peixin Du; Junming Zhou
Source:
Chemical communications 2018 v.54 no.82 pp. 11649-11652
ISSN:
1364-548X
Subject:
adsorption; aluminum oxide; chemical reactions; nanoparticles; phosphates
Abstract:
... A synergistic host–guest coupling is exploited to disorder nano-kaolinite unit layers to form Al₂O₃ nanoparticles, which act as activated adsorptive sites; meanwhile, the coupling enables La-based nanoparticles to anchor homogenously on the nano-kaolinite surfaces, fully utilizing their adsorption ability. The activated hybrid nanostructures exhibit an excellent phosphate adsorption capacity. ...
DOI:
10.1039/c8cc04642e

22. Activation of natural halloysite nanotubes by introducing lanthanum oxycarbonate nanoparticles via co-calcination for outstanding phosphate removal

Author:
Yanfu WeiThese authors contributed equally to this work.; Peng Yuan; Dong Liu; Dusan Losic; Daoyong Tan; Fanrong Chen; Hongchang Liu; Junming Zhou; Peixin Du; Yaran Song
Source:
Chemical communications 2019 v.55 no.14 pp. 2110-2113
ISSN:
1364-548X
Subject:
adsorption; aluminum oxide; chemical communication; chemical reactions; halloysite; lanthanum; nanoparticles; nanotubes; phosphates; sewage
Abstract:
... Halloysite nanotubes were activated via co-calcination of halloysite and the precursors of lanthanum oxycarbonate (LO), generating reactive alumina nanoparticles and uniformly anchoring LO nanoparticles to halloysite surfaces. The resulting LO–alumina combination exhibits record-high phosphate adsorption capacity as well as excellence in adsorption selectivity and sewage phosphate removal. ...
DOI:
10.1039/c8cc10314c

23. Aldol reaction of kojic acid using alumina supported base catalyst and enzymatic resolution of the aldol adduct by CALB

Author:
Deepak K. Sharma; Baldev Singh; Debaraj Mukherjee
Source:
Tetrahedron letters 2014 v.55 no.42 pp. 5846-5850
ISSN:
0040-4039
Subject:
Pseudozyma antarctica; acetates; alcohols; aldehydes; aluminum oxide; carboxylic ester hydrolases; catalysts; chemical reactions; chemical structure; kojic acid; regioselectivity
Abstract:
... An efficient and ecofriendly aldol reaction of kojic acid with aldehydes using a heterogeneous reusable catalyst (alumina modified with base) is developed. Enzymatic hydrolytic resolution of the racemic acetylated aldol adduct 2 was achieved using lipase from Candida antarctica type B (CALB). The key feature of this enzymatic resolution is that regioselective deacetylation of ester derived from th ...
DOI:
10.1016/j.tetlet.2014.08.113

24. Alumina nanowire forests via unconventional anodization and super-repellency plus low adhesion to diverse liquids

Author:
Weici Wu; Xiaolong Wang; Daoai Wang; Miao Chen; Feng Zhou; Weimin Liu; Qunji Xue
Source:
Chemical communications 2009 v. no.9 pp. 1043-1045
ISSN:
1364-548X
Subject:
adhesion; alkanes; aluminum oxide; chemical reactions; emulsions; glycerol; ionic liquids; lubricants; nanowires; oils; polydimethylsiloxane
Abstract:
... Multiple facet supported alumina nanowires are produced very efficiently in a very short time via high field anodization; upon modification with perfluorosilane, the surface becomes super-repellent towards a broad range of liquids, which includes (salted) water, water emulsion, common organic liquids like glycerol and alkanes, and a variety of lubrication oils including ionic liquids, poly(α-olefi ...
DOI:
10.1039/b818633b

25. Alumina-encapsulated vaccine formulation with improved thermostability and immunogenicity

Author:
Hangyu ZhouH. Zhou and G. Wang contributed equally to this work.; Guangchuan Wang; Xiao-Feng Li; Yaling Li; Shun-Ya Zhu; Cheng-Feng Qin; Ruikang Tang
Source:
Chemical communications 2016 v.52 no.38 pp. 6447-6450
ISSN:
1364-548X
Subject:
Enterovirus A; aluminum oxide; chemical reactions; encapsulation; immunogenicity; live vaccines; thermal stability
Abstract:
... Developing vaccine formulations with excellent thermostability and immunogenicity remains a great challenge. By in situ encapsulating a live-attenuated strain of human enterovirus 71 (EV71) in alumina, we obtained a robust vaccine formulation named EV71@NanoAlum, which features significantly enhanced thermostability and immunogenicity. This attempt follows a material-based tactic for vaccine impro ...
DOI:
10.1039/c6cc02595a

26. Alumina-promoted oxodefluorination

Author:
Akhmetov Vladimir; Feofanov Mikhail; Konstantin Amsharov
Source:
RSC advances 2020 v.10 no.18 pp. 10879-10882
ISSN:
2046-2069
Subject:
aluminum oxide; chemical bonding; chemical reactions; dibenzofuran; fluorine; furans; oxygen
Abstract:
... A simple protocol for the clean preparation of heterocyclic compounds containing dibenzofuran's core via oxodefluorination of fluoroarenes on activated γ-Al₂O₃ is reported. Alumina can be considered as a reliable oxygen source enabling one-pot substitution of fluorine atoms and yielding benzoannulated furan derivatives. The corresponding C–F bond activation is selective towards less stable C–Br/C– ...
DOI:
10.1039/d0ra01369b

27. Aluminium-mediated aromatic C–F bond activation: regioswitchable construction of benzene-fused triphenylene frameworks

Author:
Naoto Suzuki; Takeshi Fujita; Konstantin Yu. Amsharov; Junji Ichikawa
Source:
Chemical communications 2016 v.52 no.88 pp. 12948-12951
ISSN:
1364-548X
Subject:
aluminum; aluminum chloride; aluminum oxide; carbon; chemical bonding; chemical reactions; cleavage (chemistry); fluorine; regioselectivity
Abstract:
... Selective synthesis of benzo[f]tetraphenes or benzo[g]chrysenes was achieved via aromatic C–F bond cleavage and unprecedented regioselective C–C bond formation depending upon the choice of aluminium reagents. On treatment with AlCl₃, 2-(biphenyl-2-yl)-1-fluoronaphthalenes afforded exclusively benzo[f]tetraphenes via C–C bond formation on the carbon atom γ to the original position of the fluorine s ...
DOI:
10.1039/c6cc07199f

28. Aluminum oxide mediated C–F bond activation in trifluoromethylated arenes

Author:
O. Papaianina; K. Yu. Amsharov
Source:
Chemical communications 2016 v.52 no.7 pp. 1505-1508
ISSN:
1364-548X
Subject:
aluminum oxide; aromatic hydrocarbons; carboxylic acids; chemical bonding; chemical reactions; ketones
Abstract:
... Thermally activated γ-aluminium oxide was found to be very effective for C–F bond activation in trifluoromethylated arenes. Depending on the activation degree the respective arenes can be converted either to cyclic ketones or to the respective carboxylic acids with good to excellent yields. ...
DOI:
10.1039/c5cc08747c

29. Aluminum recovery as a product with high added value using aluminum hazardous waste

Author:
E. David; J. Kopac
Source:
Journal of hazardous materials 2013 v.261 pp. 316-324
ISSN:
0304-3894
Subject:
X-ray diffraction; aluminum; aluminum oxide; atomic absorption spectrometry; chemical analysis; chemical reactions; hazardous waste; ions; landfills; leaching; porosity; raw materials; scanning electron microscopy; solid wastes; temperature; value added; value-added products
Abstract:
... The samples of hazardous aluminum solid waste such as dross were physically and chemically characterized. A relationship between density, porosity and metal content of dross was established. The paper also examines the chemical reactions involving aluminum dross in landfill and the negative consequences. To avoid environmental problems and to recovery the aluminum, a processing method was develope ...
DOI:
10.1016/j.jhazmat.2013.07.042

30. Amorphous alumina nanowire array efficiently delivers Ac-DEVD-CHO to inhibit apoptosis of dendritic cells

Author:
Lester Lampert; Brittany Timonen; Sean Smith; Brittney Davidge; Haiyan Li; John F. Conley; Jeffrey D. Singer; Jun Jiao
Source:
Chemical communications 2014 v.50 no.10 pp. 1234-1237
ISSN:
1364-548X
Subject:
aluminum oxide; apoptosis; carbon nanotubes; caspase-3; chemical communication; chemical reactions; dendritic cells; fluorescence microscopy; nanowires
Abstract:
... To create an effective well-ordered delivery platform still remains a challenge. Herein we fabricate vertically aligned alumina nanowire arrays via atomic layer deposition templated by carbon nanotubes. Using these arrays, a caspase-3/7 inhibitor was delivered into DC 2.4 cells and blocked apoptosis, as confirmed by fluorescence microscopy. ...
DOI:
10.1039/c3cc48088g
PubMed:
24336780
PubMed Central:
PMC3929101

31. An approach toward the syntheses of triazolo benzoxazines, triazolo quinoxalines, triazolo benzodiazepines, triazolo benzoxazepines, and triazolo benzothiazines via a simple and convenient protocol using basic alumina as solid support

Author:
Nivedita Chatterjee; Swarbhanu Sarkar; Rammyani Pal; Asish Kumar Sen
Source:
Tetrahedron letters 2014 v.55 no.14 pp. 2261-2265
ISSN:
0040-4039
Subject:
aluminum oxide; benzodiazepines; bromine; catalysts; chemical reactions; chemical structure; copper; ligands; microwave treatment; protocols; quinoxalines; toxicity; triazoles
Abstract:
... A microwave assisted green protocol for the syntheses of triazole fused benzoxazines, benzoxazepines, quinoxalines, and benzothiazines was investigated using basic alumina as solid support. The one-pot reaction was carried out using Cu(phen)(PPh3)Br as a catalyst. The protocol did not require the use of any additional ligands, base or the use of expensive and toxic palladiums. ...
DOI:
10.1016/j.tetlet.2014.02.080

32. An easy access to diversely fused dioxa-2-aza-tricyclo[n.3.1.0²,ⁿ]tetra/pentadecanes under solvent-free condition

Author:
Rupankar Paira; Shyamal Mondal; Arindam Maity; Krishnendu B. Sahu; Subhendu Naskar; Pritam Saha; Abhijit Hazra; Sandip Kundu; Sukdeb Banerjee; Nirup B. Mondal
Source:
Tetrahedron letters 2011 v.52 no.42 pp. 5516-5520
ISSN:
0040-4039
Subject:
aluminum oxide; chemical reactions; chemical structure; quinoline
Abstract:
... Efficient syntheses of phenyl/N-heterocycle fused 6,13-dioxa-2-aza-tricyclo[8.3.1.0²,⁸]tetradecanes have been accomplished from 8-hydroxy quinoline derivatives under solvent-free condition, using basic alumina as the solid support. The methodology was successfully extended for the synthesis of corresponding pentadecane derivatives under similar reaction conditions. In terms of its general applicab ...
DOI:
10.1016/j.tetlet.2011.08.080

33. An efficient and general procedure for the synthesis of alkynyl chalcogenides (selenides and tellurides) by alumina-supported Cu(II)-catalyzed reaction of alkynyl bromides and diphenyl dichalcogenides

Author:
Sabir Ahammed; Sukalyan Bhadra; Debasish Kundu; Bojja Sreedhar; Brindaban C. Ranu
Source:
Tetrahedron 2012 v.68 no.51 pp. 10542-10549
ISSN:
0040-4020
Subject:
aluminum oxide; biphenyl; bromides; catalysts; chemical reactions; chemical structure; copper; indium; zinc
Abstract:
... Alumina (Al₂O₃) supported Cu(II) efficiently catalyzes the reaction of alkynyl bromides and diphenyl diselenides and ditellurides in presence of Zn dust or indium(I) bromide to provide the corresponding alkynyl selenides and tellurides. The reactions of a wide variety of substituted alkynyl bromides have been addressed. The zinc dust or InBr is required for the cleavage of diphenyl selenides/tellu ...
DOI:
10.1016/j.tet.2012.08.046

34. An improved organic/inorganic solid receptor for colorimetric cyanide-chemosensing in water: towards new mechanism aspects, simplistic use and portability

Author:
Arash Mouradzadegun; Fatemeh Abadast
Source:
Chemical communications 2014 v.50 no.100 pp. 15983-15986
ISSN:
1364-548X
Subject:
aluminum oxide; anions; catalytic activity; chemical reactions; colorimetry; cyanides; toxicity
Abstract:
... A heterogeneous reaction-based colorimetric chemodosimeter toward cyanide anions was designed based on a hybrid pyrylium/alumina probe which possesses a great selectivity for CN⁻ over other common anions even at significantly higher concentrations. The synergistic incorporation of the inorganic matrix and the organic receptor can play a pivotal role in the convenient field-usable determination of ...
DOI:
10.1039/c4cc06756h

35. An in Situ Generated Palladium on Aluminum Oxide: Applications in Gram-Scale Matsuda–Heck Reactions

Author:
Pape Simon; Daukšaitė Lauryna; Lucks Sandra; Gu Xiaoting; Brunner Heiko
Source:
Organic letters 2016 v.18 no.24 pp. 6376-6379
ISSN:
1523-7052
Subject:
aluminum oxide; catalysts; catalytic activity; chemical reactions; chemical structure; organic compounds; palladium
Abstract:
... In situ generated palladium on aluminum oxide provides an active catalytic system for Matsuda-Heck reactions in gram-scale. The novel catalyst proceeded through a significantly higher catalytic activity compared to the classical Pd/C system. Based on the high catalytic activity the first α,β,β-triarylation of methyl acrylate in good yields could be provided in one-step. ...
DOI:
10.1021/acs.orglett.6b03268

36. An one-pot approach to the synthesis of triazolobenzothiadiazepine 1,1-dioxide derivatives by basic alumina-supported azide–alkyne [3+2] cycloaddition

Author:
K.C. Majumdar; Sintu Ganai; Biswajit Sinha
Source:
Tetrahedron 2012 v.68 no.38 pp. 7806-7811
ISSN:
0040-4020
Subject:
aluminum oxide; chemical reactions; chemical structure; environmental impact; organic compounds
Abstract:
... An efficient one-pot strategy for the synthesis of triazolobenzothiadiazepine 1,1-dioxide derivatives has been developed by the reaction of 2-azido-N-substituted benzenesulfonamides and propargyl bromide in basic alumina under microwave condition via [3+2] azide–alkyne cycloaddition reaction. This protocol has synthetic advantages in terms of low environmental impact and short reaction time. ...
DOI:
10.1016/j.tet.2012.07.040

37. An ultra-low Pd loading nanocatalyst with high activity and stability for CO oxidative coupling to dimethyl oxalate

Author:
Si-Yan Peng; Zhong-Ning Xu; Qing-Song Chen; Yu-Min Chen; Jing Sun; Zhi-Qiao Wang; Ming-Sheng Wang; Guo-Cong Guo
Source:
Chemical communications 2013 v.49 no.51 pp. 5718-5720
ISSN:
1364-548X
Subject:
aluminum oxide; ambient temperature; catalysts; catalytic activity; chemical communication; chemical reactions; copper; ions; nanoparticles; oxalates; palladium
Abstract:
... A Pd/α-Al₂O₃ nanocatalyst with ultra-low Pd loading exhibits high activity and stability for CO oxidative coupling to dimethyl oxalate, which was prepared by a Cu²⁺-assisted in situ reduction method at room temperature. The small size and high dispersion of Pd nanoparticles facilitated by Cu²⁺ ions are responsible for the excellent catalytic activity. ...
DOI:
10.1039/c3cc00219e

38. Artificial hemoprotein nanotubes

Author:
Gang Lu; Teruyuki Komatsu; Eishun Tsuchida
Source:
Chemical communications 2007 v. no.28 pp. 2980-2982
ISSN:
1364-548X
Subject:
aluminum oxide; chemical reactions; heme; human serum albumin; nanotubes; oxygen
Abstract:
... Artificial hemoprotein nanotubes have been prepared by a layer-by-layer deposition technique with human serum albumin (HSA) incorporating the synthetic heme (FeP) [HSA–FeP] using an anodic porous alumina template; each of the liberated tubules has a very uniform outer/inner diameter and can reversibly bind dioxygen (O₂) at 25 °C. ...
DOI:
10.1039/b704135g

39. Ash fusion characteristics of bamboo, wood and coal

Author:
Zhijia Liu; Tao Zhang; Jian Zhang; Hongzhong Xiang; Xiaomeng Yang; Wanhe Hu; Fang Liang; Bingbing Mi
Source:
Energy 2018 v.161 pp. 517-522
ISSN:
0360-5442
Subject:
X-ray diffraction; aluminum oxide; bamboos; calcium oxide; chemical composition; chemical reactions; coal; ferric oxide; fluorescence emission spectroscopy; heat treatment; power plants; scanning electron microscopy; silica; temperature; thermal conductivity; transmission electron microscopy; wood; China
Abstract:
... Ash fusion characteristics of bamboo, masson pine and coal were investigated using X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). XRF results showed that the major components of bamboo ash were K₂O, SiO₂ and SO₃. Masson pine ash mainly included Fe₂O₃ and CaO. Coal ash was comprised of SiO₂, Al₂O₃, CaO, Fe₂O₃ and SO₃ ...
DOI:
10.1016/j.energy.2018.07.131

40. Atomic layer deposited coatings to significantly stabilize anodes for Li ion batteries: effects of coating thickness and the size of anode particles

Author:
Dongniu Wang; Jinli Yang; Jian Liu; Xifei Li; Ruying Li; Mei Cai; Tsun-Kong Sham; Xueliang Sun
Source:
Journal of materials chemistry A 2014 v.2 no.7 pp. 2306-2312
ISSN:
2050-7496
Subject:
aluminum oxide; anodes; batteries; chemical reactions; coatings; electrochemistry; electrolytes; tin dioxide
Abstract:
... A study of the effect of thickness of alumina coating on the electrochemical performances of various sizes of SnO₂ electrodes has been systematically studied in this paper. It is found that the different volume changes in various sizes of SnO₂ electrodes can be suppressed by optimized thickness of Al₂O₃ coating layers, with a range from less than 1 nm to up to 3 nm deposited by atomic layer deposi ...
DOI:
10.1039/c3ta13677a

41. Atomic layer deposition of Al₂O₃ process emissions

Author:
Lulu Ma; Dongqing Pan; Yuanyuan Xie; Chris Yuan
Source:
RSC advances 2015 v.5 no.17 pp. 12824-12829
ISSN:
2046-2069
Subject:
X-ray photoelectron spectroscopy; aerosols; aluminum oxide; byproducts; chemical bonding; chemical reactions; environmental impact; ethane; gas emissions; methane; nanotechnology; reaction mechanisms
Abstract:
... The ALD process emissions and the associated chemical reaction mechanism in the ALD of the Al₂O₃ system are studied and reported. In gaseous emissions, 3.22 vol% of CH₄ and 6.01 × 10⁻² vol% of C₂H₆ are found. Net peak emissions of aerosols are found between 1 × 10³ and 1 × 10⁴ # cm⁻³ and net total emissions of 25 cycles are in the range of 6.0 × 10⁵ and 2.5 × 10⁶ particles. Most aerosols are deter ...
DOI:
10.1039/c4ra14568b

42. Atomic layer deposition on 2D transition metal chalcogenides: layer dependent reactivity and seeding with organic ad-layers

Author:
Christian Wirtz; Toby Hallam; Conor Patrick Cullen; Nina C. Berner; Maria O'Brien; Mario Marcia; Andreas Hirsch; Georg S. Duesberg
Source:
Chemical communications 2015 v.51 no.92 pp. 16553-16556
ISSN:
1364-548X
Subject:
aluminum oxide; chemical reactions; crystals; molybdenum disulfide; vapors
Abstract:
... This commmunication presents a study of atomic layer deposition of Al₂O₃ on transition metal dichalcogenide (TMD) two-dimensional films which is crucial for use of these promising materials for electronic applications. Deposition of Al₂O₃ on pristine chemical vapour deposited MoS₂ and WS₂ crystals is demonstrated. This deposition is dependent on the number of TMD layers as there is no deposition o ...
DOI:
10.1039/c5cc05726d

43. Attachment of phosphonate-functionalised azo-dyes to oxide surfaces to give enhanced light and wet fastness

Author:
Sonali S. De Silva; Philip J. Camp; David K. Henderson; Dorothy C. R. Henry; Hamish McNab; Peter A. Tasker; Paul Wight
Source:
Chemical communications 2003 v. no.14 pp. 1702-1703
ISSN:
1364-548X
Subject:
aluminum oxide; azo dyes; chemical reactions; cyclodextrins
Abstract:
... Phosphonate-functionalised dyes have been shown to bind strongly to aluminium oxides and to form stable 1 : 1 complexes with cyclodextrins at the surface. ...
DOI:
10.1039/b303608c

44. Basic alumina supported one-pot synthesis of structurally diverse pyridine/quinolinine-fused novel diazepanium, diazocanium, imidazodilinium and tetrahydro-pyrimidiniums

Author:
Rupankar Paira; Arindam Maity; Shyamal Mondal; Subhendu Naskar; Krishnendu B. Sahu; Pritam Saha; Abhijit Hazra; E. Padmanaban; Sukdeb Banerjee; Nirup B. Mondal
Source:
Tetrahedron letters 2011 v.52 no.14 pp. 1653-1657
ISSN:
0040-4039
Subject:
aluminum oxide; chemical reactions; chemical structure; microwave radiation; organic compounds; synthesis
Abstract:
... Basic alumina supported solvent-free one-pot synthesis of pyridine-fused polycyclic diazepaniums was achieved under microwave irradiation. The process was successfully extended to the synthesis of pyridine-fused bicyclic imidazolidiniums and tetrahydro-pyrimidiniums and also of tri- and tetracyclic diaza-heterocycle-fused quinoliniums. The dual characteristic of basic alumina, a solid support as w ...
DOI:
10.1016/j.tetlet.2011.01.134

45. Basic alumina supported tandem synthesis of bridged polycyclic quinolino/isoquinolinooxazocines under microwave irradiation

Author:
Shyamal Mondal; Rupankar Paira; Arindam Maity; Subhendu Naskar; Krishnendu B. Sahu; Abhijit Hazra; Pritam Saha; Sukdeb Banerjee; Nirup B. Mondal
Source:
Tetrahedron letters 2011 v.52 no.36 pp. 4697-4700
ISSN:
0040-4039
Subject:
aluminum oxide; chemical reactions; chemical structure; microwave radiation; organic compounds; salts; synthesis
Abstract:
... Basic alumina supported, solvent-free synthesis of novel oxazocines, medium size heterocycles, has been achieved in excellent yields by tandem C-alkylation followed by intramolecular O-alkylation of hydroxyquinoline/isoquinoline(s) with quinolinium salts under microwave irradiation. The method provides a facile and efficient route for the construction of polynuclear bridge-head oxazocines. ...
DOI:
10.1016/j.tetlet.2011.07.012

46. Beyond waste: new sustainable fillers from fly ashes stabilization, obtained by low cost raw materials

Author:
N. Rodella; M. Pasquali; A. Zacco; F. Bilo; L. Borgese; N. Bontempi; G. Tomasoni; L.E. Depero; E. Bontempi
Source:
Heliyon 2016 v.2 no.9 pp. e00163
ISSN:
2405-8440
Subject:
agroindustrial byproducts; aluminum oxide; ambient temperature; antimony; bentonite; calcium hydroxide; chemical reactions; coal fly ash; energy; flue gas desulfurization; husk ash; incinerators; landfills; municipal solid waste; pollution; silica; toxicity
Abstract:
... A sustainable economy can be achieved only by assessing processes finalized to optimize the use of resources. Waste can be a relevant source of energy thanks to energy-from-waste processes. Concerns regarding the toxic fly ashes can be solved by transforming them into resource as recycled materials. The commitment to recycle is driven by the need to conserve natural resources, reduce imports of ra ...
DOI:
10.1016/j.heliyon.2016.e00163
PubMed:
27699284
PubMed Central:
PMC5035358

47. Binary hydrogel nanowires of invertible core/shell phases prepared in porous alumina membranes

Author:
Zhenzhong Yang; Zhongwei Niu
Source:
Chemical communications 2002 v. no.17 pp. 1972-1973
ISSN:
1364-548X
Subject:
aluminum oxide; chemical reactions; hydrogels; hydrophilicity; nanowires
Abstract:
... Poly(N,N-dimethylacrylamide)/poly(acrylic ammonium) binary hydrogel nanowires with invertible core/shell phases were made by templated synthesis in porous alumina membranes with controlled pore wall hydrophilicity. ...
DOI:
10.1039/b205336e

48. Capturing metal-support interactions in situ during the reduction of a Re promoted Co/γ-Al₂O₃ catalyst

Author:
N. E. Tsakoumis; R. E. Johnsen; W. van Beek; M. Rønning; E. Rytter; A . Holmen
Source:
Chemical communications 2016 v.52 no.15 pp. 3239-3242
ISSN:
1364-548X
Subject:
X-ray diffraction; aluminum oxide; catalysts; cations; chemical reactions; cobalt; cobalt oxide; hydrogen
Abstract:
... The reduction of a Re promoted Co/γ-Al₂O₃ catalyst was monitored in situ by synchrotron X-ray powder diffraction (XRPD) under H₂ environment. Whole powder pattern analysis revealed a non-linear expansion of the unit cell of γ-Al₂O₃ during the reduction process, suggesting the diffusion of Co cations into the structure of the support. The non-linear cell expansion coincided with the formation of a ...
DOI:
10.1039/c5cc09879c

49. Catalytic ignition of ionic liquids for propellant applications

Author:
Julia L. Shamshina; Marcin Smiglak; David M. Drab; T. Gannon Parker; H. Waite H. Dykes, Jr.; Roberto Di Salvo; Alton J. Reich; Robin D. Rogers
Source:
Chemical communications 2010 v.46 no.47 pp. 8965-8967
ISSN:
1364-548X
Subject:
aluminum oxide; catalysts; catalytic activity; chemical reactions; hydrazine; ionic liquids; iridium; nitrates
Abstract:
... In this proof of concept study, the ionic liquids, 2-hydroxyethylhydrazinium nitrate and 2-hydroxyethylhydrazinium dinitrate, ignited on contact with preheated Shell 405 (iridium supported on alumina) catalyst and energetically decomposed with no additional ignition source, suggesting a possible route to hydrazine replacements. ...
DOI:
10.1039/c0cc02162h

50. Ceramic membranes for separation of proteins and DNA through in situ growth of alumina nanofibres inside porous substrates

Author:
Xue Bin Ke; Ren Fu Shao; Huai Yong Zhu; Yong Yuan; Dong Jiang Yang; Kyle R. Ratinac; Xue Ping Gao
Source:
Chemical communications 2009 v. no.10 pp. 1264-1266
ISSN:
1364-548X
Subject:
DNA; aluminum oxide; bovine serum albumin; ceramics; chemical reactions; hemoglobin; nanofibers; permeability
Abstract:
... Ceramic membranes were fabricated by in situ synthesis of alumina nanofibres in the pores of an alumina support as a separation layer, and exhibited a high permeation selectivity for bovine serum albumin relative to bovine hemoglobin (over 60 times) and can effectively retain DNA molecules at high fluxes. ...
DOI:
10.1039/b819292h