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You searched for: Journal name RSC advances Remove constraint Journal name: RSC advances Publication year rev 7981-2019 Remove constraint Publication year rev: 7981-2019 Source 2019 v.9 no.52 Remove constraint Source: 2019 v.9 no.52
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1. A novel forced separation method for the preparation of paraffin with excellent phase changes

Author:
Gang Bai; Qinzhen Fan; Jianfeng Sun; Lihua Cheng; Xi-Ming Song
Source:
RSC advances 2019 v.9 no.52 pp. 30453-30460
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; carbon; differential scanning calorimetry; energy; enthalpy; gas chromatography; lipid content; liquids; melting point; phase transition; raw materials; temperature
Abstract:
... A novel forced separation method based on driving force vacuum sweating was used to prepare high melting point paraffin with high phase-change enthalpies. The effects of the vacuum pressure and final separation temperature on the forced separation of the paraffin components were investigated. The research results showed that the optimal vacuum pressure for forced separation was 80.0 kPa. The perfo ...
DOI:
10.1039/c9ra04722k

2. Acetylene hydrochlorination over boron-doped Pd/HY zeolite catalysts

Author:
Lu Wang; Lizhen Lian; Haijun Yan; Feng Wang; Jide Wang; Chao Yang; Lida Ma
Source:
RSC advances 2019 v.9 no.52 pp. 30335-30339
ISSN:
2046-2069
Subject:
acetylene; boron; carbon; catalysts; catalytic activity; palladium; zeolites
Abstract:
... A novel boron-doped Pd/HY zeolite catalyst for acetylene hydrochlorination was prepared and exhibited an outstanding catalytic performance (the acetylene conversion was maintained at >95% for about 30 h). The boron species can stabilize catalytically active Pd²⁺ species and weaken carbon deposition and Pd²⁺ reduction during the reaction, thus improving the catalytic stability. ...
DOI:
10.1039/c9ra05576b

3. An insight into the intermolecular vibrational modes of dicationic ionic liquids through far-infrared spectroscopy and DFT calculations

Author:
Luca Guglielmero; Lorenzo Guazzelli; Alessandra Toncelli; Cinzia Chiappe; Alessandro Tredicucci; Christian Silvio Pomelli
Source:
RSC advances 2019 v.9 no.52 pp. 30269-30276
ISSN:
2046-2069
Subject:
cations; chemical interactions; energy; far-infrared spectroscopy; ionic liquids; models; physicochemical properties
Abstract:
... Dicationic ionic liquids (DILs) are a subclass of the ionic liquid (IL) family and are characterized by two cationic head groups linked by means of a spacer. While DILs are increasingly attracting interest due to their peculiar physico-chemical properties, there is still a lack of understanding of their intermolecular interactions. Herein, we report our investigations on the intermolecular vibrati ...
DOI:
10.1039/c9ra05735h

4. Appraisal of Cu(ii) adsorption by graphene oxide and its modelling via artificial neural network

Author:
Yumeng Zhang; Min Dai; Ke Liu; Changsheng Peng; Yufeng Du; Quanchao Chang; Imran Ali; Iffat Naz; Devendra P. Saroj
Source:
RSC advances 2019 v.9 no.52 pp. 30240-30248
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorption; algorithms; copper; graphene oxide; metal ions; neural networks; pH; scanning electron microscopy; statistical models; temperature; water treatment
Abstract:
... Graphene oxide (GO), as an emerging material, exhibits extraordinary performance in terms of water treatment. Adsorption is a process that is influenced by multiple factors and is difficult to simulate by traditional statistical models. Artificial neural networks (ANNs) can establish highly accurate nonlinear functional relationships between multiple variables; hence, we constructed a three-layere ...
DOI:
10.1039/c9ra06079k

5. Carbocatalysed hydrolytic cleaving of the glycosidic bond in fucoidan under microwave irradiation

Author:
Elaine G. Mission; Jonas Karl Christopher N. Agutaya; Armando T. Quitain; Mitsuru Sasaki; Tetsuya Kida
Source:
RSC advances 2019 v.9 no.52 pp. 30325-30334
ISSN:
2046-2069
Subject:
Fucus vesiculosus; Undaria pinnatifida; biomass; carbon nanotubes; catalysts; catalytic activity; cleavage (chemistry); depolymerization; fucoidan; fucose; gel chromatography; glycosidic linkages; graphene; graphene oxide; hydrolysis; irradiation; macroalgae; microwave radiation; oligosaccharides; oxygen; temperature
Abstract:
... Biomass valorization involves breaking down naturally occurring long chain polysaccharides into their constituent monomers. The polysaccharide chain consists of monomers adjoined via C (carbon)–O (oxygen) glycosidic linkages that are typically cleaved via hydrolytic scission. In this study, we aimed to recover fucose from the polysaccharide fucoidan, which can be extracted from seaweed biomass. We ...
DOI:
10.1039/c9ra03594j

6. Design of GO–Ag-functionalized Fe₃O₄@CS composite for magnetic adsorption of rhodamine B

Author:
Lili Xu; Hongbo Suo; Renmin Liu; Houmei Liu; Hongdeng Qiu
Source:
RSC advances 2019 v.9 no.52 pp. 30125-30133
ISSN:
2046-2069
Subject:
adsorbents; adsorption; chitosan; desorption; detection limit; energy-dispersive X-ray analysis; fluorescence; graphene oxide; iron oxides; magnetism; nanoparticles; nanosilver; personal care products; rhodamines; scanning electron microscopy; silver; soft drinks; wastewater
Abstract:
... In this study, a novel magnetic composite (Fe₃O₄@CS/GO/Ag) modified with chitosan (CS), graphene oxide (GO) and Ag nanoparticles (Ag NPs) was successfully prepared as an efficient adsorbent for detection of rhodamine B (RB) combined with a fluorescence technique. The properties of the magnetic composite were confirmed by field emission scanning electron microscopy, energy dispersive X-ray spectros ...
DOI:
10.1039/c9ra04897a

7. Development of an acetone sensor using nanostructured Co₃O₄ thin films for exhaled breath analysis

Author:
Parthasarathy Srinivasan; Arockia Jayalatha Kulandaisamy; Ganesh Kumar Mani; K. Jayanth Babu; Kazuyoshi Tsuchiya; John Bosco Balaguru Rayappan
Source:
RSC advances 2019 v.9 no.52 pp. 30226-30239
ISSN:
2046-2069
Subject:
absorption; acetone; ambient temperature; biomarkers; cobalt; cobalt oxide; detection limit; diagnostic techniques; energy; films (materials); health services; ions; people; pyrolysis; wavelengths
Abstract:
... In recent times, the development of breath sensors for the detection of Diabetic Keto-Acidosis (DKA) has been gaining prominent importance in the field of health care and advanced diagnostics. Acetone is one of the prominent biomarkers in the exhaled breath of persons affected by DKA. In this background, nanostructured cobalt oxide sensing elements were fabricated using a spray pyrolysis technique ...
DOI:
10.1039/c9ra04230j

8. Electrochemical reduction of different Ag(i)-containing solutions in bioelectrochemical systems for recovery of silver and simultaneous power generation

Author:
Ngo Anh Dao Ho; Sandhya Babel
Source:
RSC advances 2019 v.9 no.52 pp. 30259-30268
ISSN:
2046-2069
Subject:
X-ray diffraction; ammonia; bioelectrochemistry; cathodes; crystals; electric potential difference; electricity generation; energy-dispersive X-ray analysis; ions; power generation; scanning electron microscopy; silver; wastewater
Abstract:
... In this study, dual-chamber bioelectrochemical reactors (i.e., R1, R2, R3, and R4) were employed to investigate the Ag recovery and electricity production from different Ag(i)-containing artificial wastewaters (i.e., Ag⁺ solution, [Ag(NH₃)₂]⁺ and [Ag(S₂O₃)₂]³⁻ complexes, and mixed metal solution). Results showed that the electrochemical reductions of Ag(i) ions in all reactors were rapid reactions ...
DOI:
10.1039/c9ra06369b

9. Identification of proteins in housefly (Musca domestica) larvae powder by LC-MS/MS and their potential medical relevance

Author:
Mengya Jiao; Lei Chen; Yinru He; Lirong Wu; Hanfang Mei
Source:
RSC advances 2019 v.9 no.52 pp. 30545-30555
ISSN:
2046-2069
Subject:
Alzheimer disease; Musca domestica; amino acid sequences; antimicrobial peptides; antioxidants; biomedical research; enzymatic hydrolysis; genetically modified organisms; insect larvae; insect proteins; liquid chromatography; mice; powders; protective effect; tandem mass spectrometry
Abstract:
... Housefly larvae (HL) powder was used to cure wounds centuries ago for its good nutritional and pharmacological values. At present, most of the medical studies are about the crude extracts of HL, while the specific pharmacological material basis is still unclear. We ground third-instar Musca domestica larvae into a powder, degreasing and preparing the protein extract. The protein extract was subjec ...
DOI:
10.1039/c9ra05854k

10. Improved hydrogen production in the single-chamber microbial electrolysis cell with inhibition of methanogenesis under alkaline conditions

Author:
Wanjun Cui; Guangli Liu; Cuiping Zeng; Yaobin Lu; Haiping Luo; Renduo Zhang
Source:
RSC advances 2019 v.9 no.52 pp. 30207-30215
ISSN:
2046-2069
Subject:
Methanobacteriaceae; acetates; anodes; bicarbonates; biofilm; biomass; energy recovery; gene dosage; hydrogen; hydrogen production; mercurous chloride; methane; methane production; methanogens; microbial communities; microbial electrolysis cells; pH; wastewater treatment
Abstract:
... The aim of this study was to investigate hydrogen production enhanced by methanogenesis inhibition in the single-chamber microbial electrolysis cell (MEC) under alkaline conditions. With 50 mM bicarbonate buffer and 1 g L⁻¹ acetate, the MEC was tested at pH = 8.5, 9.5, 10.5, and 11.2, respectively, within 124 d operation. Effective methanogenesis inhibition in the MEC increased with pH from 8.5 to ...
DOI:
10.1039/c9ra05483a

11. Ir(iii)-catalyzed thioether directed arene C–H alkenylation

Author:
Chen Li; Xian Chen; Rui-Peng Bao; Dong-Li Li; Kun Zhang; Dong-Hui Wang
Source:
RSC advances 2019 v.9 no.52 pp. 30134-30138
ISSN:
2046-2069
Subject:
aromatic hydrocarbons; carbon-hydrogen bond activation; catalytic activity; chemical bonding; moieties; oxidants
Abstract:
... In this study, we demonstrate an Ir(iii)-catalyzed thioether directed alkenylation of arene C–H bonds under mild reaction conditions. The selectivity for mono- or di-alkenylation is controlled by the concentration of alkene and oxidant loading. Various functional groups are tolerated, and moderate to good yields of alkenylated products are achieved. ...
DOI:
10.1039/c9ra06811b

12. KOᵗBu-promoted oxidative dimerizations of 2-methylquinolines to 2-alkenyl bisquinolines with molecular oxygen

Author:
Zhen Wang; Jinjin Zhang; Jianxue Shi; Huiqiao Wang
Source:
RSC advances 2019 v.9 no.52 pp. 30139-30143
ISSN:
2046-2069
Subject:
bisquinolines; oxidants; oxygen
Abstract:
... KOᵗBu-promoted oxidative dimerizations of 2-methylquinolines with molecular oxygen as the oxidant have been developed for the first time. The mild reaction conditions allow the homo- and cross-dimerizations of 2-methylquinolines to give functionalized 2-alkenyl bisquinolines in highly trans-selective manners. ...
DOI:
10.1039/c9ra06465f

13. Lanthanide chains containing the naphthalenyl nitronyl nitroxide radical

Author:
Charlie V. Sarmiento; Thamyres A. Araujo; Samira G. Reis; Mateus S. de Souza; Rafael A. Allão Cassaro; Miguel A. Novak; Maria G. F. Vaz
Source:
RSC advances 2019 v.9 no.52 pp. 30302-30308
ISSN:
2046-2069
Subject:
crystal structure; ferrimagnetic materials; free radicals; gadolinium; magnetic properties; magnetism; models; temperature
Abstract:
... In this contribution we report the synthesis, structure and magnetic properties of a family of lanthanide-based one dimensional compounds [Ln(hfac)₃(NaphNN)]ₙ, where Lnᴵᴵᴵ = Gd (1), Dy(2), Tb(3) and NaphNN is the nitronyl nitroxide (NN) radical 2-(1′-naphthalenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-Imidazole-3-oxide-1-oxyl. The crystal structure reveals well isolated chains with a twofold helical ...
DOI:
10.1039/c9ra06506g

14. Mussel-inspired immobilization of Au on bare and graphene-wrapped Ni nanoparticles toward highly efficient and easily recyclable catalysts

Author:
Fatima Mahnaz; Mohammad Mostafa-Al-Momin; Md. Rubel; Md. Ferdous; Md. Shafiul Azam
Source:
RSC advances 2019 v.9 no.52 pp. 30358-30369
ISSN:
2046-2069
Subject:
catalysts; catalytic activity; comparative study; gold; methylene blue; nanocomposites; nanogold; nanoparticles; nickel; p-nitrophenol; thermal stability
Abstract:
... Bimetallic nanocatalysts have been gaining huge research attention in the heterogeneous catalysis community recently owing to their tunable properties and multifunctional characteristics. In this work, we fabricated a bimetallic core–shell nanocomposite catalyst by employing a mussel-inspired strategy for immobilizing gold nanoparticles (AuNP) on the surface of nickel nanoparticles (NiNP). NiNPs o ...
DOI:
10.1039/c9ra05736f

15. Nanoparticles in an antibiotic-loaded nanomesh for drug delivery

Author:
Melanie A. Fuller; Ashley Carey; Harriet Whiley; Rio Kurimoto; Mitsuhiro Ebara; Ingo Köper
Source:
RSC advances 2019 v.9 no.52 pp. 30064-30070
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; citrates; colistin; drugs; lactones; nanogold; nanoparticles; nuclear magnetic resonance spectroscopy; polymers; spinning; vancomycin
Abstract:
... Antibiotic loaded nanomeshes were fabricated by electrospinning polycaprolactone, a biocompatible polymer, with 12.5% w/w Colistin, 1.4% w/w Vancomycin and either cationic or anionic gold nanoparticles in varying combinations. The resulting nanomeshes had different antibiotic release profiles, with citrate capped gold nanoparticles combined with Colistin having the highest sustained release over 1 ...
DOI:
10.1039/c9ra06398f

16. Oxone promoted dehydrogenative Povarov cyclization of N-aryl glycine derivatives: an approach towards quinoline fused lactones and lactams

Author:
Devidas A. More; Ganesh H. Shinde; Aslam C. Shaikh; M. Muthukrishnan
Source:
RSC advances 2019 v.9 no.52 pp. 30277-30291
ISSN:
2046-2069
Subject:
alkynes; cycloaddition reactions; dehydrogenation; glycine (amino acid); lactams; lactones; quinoline
Abstract:
... Oxone promoted intramolecular dehydrogenative imino Diels–Alder reaction (Povarov cyclization) of alkyne tethered N-aryl glycine esters and amides has been explored, thus affording biologically significant quinoline fused lactones and lactams. The reaction is simple, scalable, and high yielding (up to 88%). The method was further extended to prepare biologically important luotonin-A analogues and ...
DOI:
10.1039/c9ra06212b

17. Rod-like anhydrous V₂O₅ assembled by tiny nanosheets as a high-performance cathode material for aqueous zinc-ion batteries

Author:
Weijun Zhou; Jizhang Chen; Minfeng Chen; Xinwu Xu; Qinghua Tian; Junling Xu; Ching-Ping Wong
Source:
RSC advances 2019 v.9 no.52 pp. 30556-30564
ISSN:
2046-2069
Subject:
batteries; cathodes; coordination polymers; diffusivity; electrochemistry; energy; nanosheets; surface area; zinc
Abstract:
... Aqueous zinc-ion batteries offer a low-cost and high-safety alternative for next-generation electrochemical energy storage, whereas suitable cathode materials remain to be explored. Herein, rod-like anhydrous V₂O₅ derived from a vanadium-based metal–organic framework is investigated. Interestingly, this material is assembled by tiny nanosheets with a large surface area of 218 m² g⁻¹ and high pore ...
DOI:
10.1039/c9ra06143f

18. Stepwise engineering of Saccharomyces cerevisiae to produce (+)-valencene and its related sesquiterpenes

Author:
Xiaodan Ouyang; Yaping Cha; Wen Li; Chaoyi Zhu; Muzi Zhu; Shuang Li; Min Zhuo; Shaobin Huang; Jianjun Li
Source:
RSC advances 2019 v.9 no.52 pp. 30171-30181
ISSN:
2046-2069
Subject:
Arabidopsis thaliana; Hyoscyamus muticus; Saccharomyces cerevisiae; alcohol dehydrogenase; aromatic compounds; bioprocessing; carbon; cell culture; cytochrome P-450; ethyl acetate; galactose; genetic engineering; glucose; grapefruits; microorganisms; oxidation; promoter regions; sesquiterpenoids; squalene; temperature; value added
Abstract:
... (+)-Valencene and (+)-nootkatone are high value-added sesquiterpenoids found in grapefruit. The synthesis of (+)-nootkatone by chemical oxidation from (+)-valencene cannot meet the increasing demand in natural aromatics markets. Development of a viable bioprocess using microorganisms is attractive. According to the yields of β-nootkatol and (+)-nootkatone by strains harboring different expression ...
DOI:
10.1039/c9ra05558d

19. Surface phosphonation treatment shows dose-dependent enhancement of the bioactivity of polyetheretherketone

Author:
Lvhua Liu; Yanyan Zheng; Qianyu Zhang; Lin Yu; Ziliang Hu; Ying Liu
Source:
RSC advances 2019 v.9 no.52 pp. 30076-30086
ISSN:
2046-2069
Subject:
X-ray photoelectron spectroscopy; adhesion; alkaline phosphatase; atomic force microscopy; bioactive properties; biological assessment; biomechanics; bone formation; collagen; contact angle; dental prosthesis; dose response; enzyme activity; extracellular matrix; femur; gene expression; histology; mineralization; models; modulus of elasticity; orthopedics; osteoblasts; phosphonates; polymerization; rats; roughness; secretion
Abstract:
... Polyetheretherketone (PEEK) is a promising alternative for biomedical metallic implants in orthopedic and dental applications because its elastic modulus is similar to that of bone. However, PEEK is a bioinert material that cannot be integrated with host bone. Our previous study showed surface phosphonation enhanced the osteogenic activity of PEEK. The purpose of this study was to evaluate the eff ...
DOI:
10.1039/c9ra05229a

20. Synthesis and photovoltaic application of NIR-emitting perylene-monoimide dyes with large Stokes-shift

Author:
Vikas Sharma; Kovida; Dhananjaya Sahoo; Nonu Varghese; Kallol Mohanta; Apurba Lal Koner
Source:
RSC advances 2019 v.9 no.52 pp. 30448-30452
ISSN:
2046-2069
Subject:
absorption; dyes; near-infrared spectroscopy
Abstract:
... An efficient Sonogashira coupling protocol is developed for tetra-alkynylation at the bay and peri-positions of the perylene-monoimide (PMI) dye in its PMI(Br)₄ form. The absorption band for these PMI dyes covered from the visible to Near-infrared (NIR) region and PMI(NMe₂)₄ is found to exhibit a record-breaking Stokes-shifted NIR emission with good photovoltaic properties. ...
DOI:
10.1039/c9ra04833b