PubAg

Main content area

You searched for: Journal RSC advances Remove constraint Journal: RSC advances Publication Year 2015 Remove constraint Publication Year: 2015 Source 2015 v.5 no.100 Remove constraint Source: 2015 v.5 no.100
Start Over

Search

100  Search Results

« Previous | 1 - 20 of 100 |
Number of results to display per page

Search Results

1. Improvement of the sodiation/de-sodiation stability of Sn(C) by electrochemically inactive Na₂Se

Author:
Dang, Hoang X.; Meyerson, Melissa L.; Heller, Adam; Mullins, C. Buddie
Source:
RSC advances 2015 v.5 no.100 pp. 82012-82017
ISSN:
2046-2069
Subject:
alloys; crystallization; electric potential difference; electrochemistry; electrodes; milling; selenides; sodium; tin
Abstract:
... Tin forms a series of sodium alloys, some with a large change in volume, sufficient to fracture the sodiated/de-sodiated tin electrodes. In a series of Sn/C and Sn/Se/C electrodes, made similarly by ball milling the elements, the sodiation/de-sodiation cycling stability in the 0.01–1.00 V vs. Na⁺/Na voltage window, in which the initially formed Na₂Se is electrochemically inactive, is best at an Sn ...
DOI:
10.1039/c5ra18046e

2. Iodine-mediated regioselective C–N and C–I bond formation of alkenes

Author:
Sun, Kai; Ma, Fengji; Liu, Lulu; Sun, Jingjing; Liu, Xin; Wang, Yachao; Zhang, Zhiguo; Zhang, Guisheng
Source:
RSC advances 2015 v.5 no.100 pp. 82492-82495
ISSN:
2046-2069
Subject:
alkenes; chemical bonding; moieties; regioselectivity
Abstract:
... Iodine-mediated intermolecular C–N and C–I bond formation of alkenes is described. A series of alkenes could be selectively converted into the corresponding aminoiodination products, which are versatile building blocks in organic synthesis and medicinal chemistry. Wide substrate scope, broad functional group tolerance and easy scale-up operation make this protocol very practical and attractive in ...
DOI:
10.1039/c5ra14407h

3. A highly sensitive hemicyanine-based fluorescent chemodosimeter for mercury ions in aqueous solution and living cells

Author:
Chen, Yu; Yang, Chengyu; Yu, Zhenni; Chen, Bo; Han, Yifeng
Source:
RSC advances 2015 v.5 no.100 pp. 82531-82534
ISSN:
2046-2069
Subject:
aqueous solutions; fluorescence; hydrolysis; ions; mercury; water solubility
Abstract:
... A novel hemicyanine-based fluorescence turn-on chemodosimeter for Hg²⁺ by mercury triggered hydrolysis of the vinyl ether group has been reported. The probe has the unique advantages of easy-preparation, good water solubility, excellent selectivity, high sensitivity, and fast response time (∼60 s) towards Hg²⁺ in aqueous solution. Furthermore, the probe is demonstrated to be qualified to detect Hg ...
DOI:
10.1039/c5ra13802g

4. Ammonolytical conversion of microcrystalline gallium antimonide GaSb to nanocrystalline gallium nitride GaN: thermodynamics vs. topochemistry

Author:
Drygaś, Mariusz; Jeleń, Piotr; Bućko, Mirosław M.; Olejniczak, Zbigniew; Janik, Jerzy F.
Source:
RSC advances 2015 v.5 no.100 pp. 82576-82586
ISSN:
2046-2069
Subject:
ammonia; byproducts; crystallites; energy; gallium; grinding; milling; nanocrystals; nitrides; powders; semiconductors; temperature; thermodynamics
Abstract:
... Reaction of microcrystalline powders of readily available gallium antimonide GaSb with ammonia gas at elevated temperatures afforded in one step high yields of nanocrystalline powders of the semiconductor, gallium nitride GaN. In particular, temperatures of 900–1000 °C and suitable reaction times of 36–170 hours resulted in complete nitridation in the system. GaN was prepared as a mixture of the m ...
DOI:
10.1039/c5ra16868f

5. A nonenzymatic electrochemical glucose sensor based on mesoporous Au/Pt nanodendrites

Author:
Song, Yang; Zhu, Chenzhou; Li, He; Du, Dan; Lin, Yuehe
Source:
RSC advances 2015 v.5 no.100 pp. 82617-82622
ISSN:
2046-2069
Subject:
catalytic activity; detection limit; electrochemistry; electrodes; glucose; gold; platinum; porous media; ultrasonic treatment
Abstract:
... Herein, an ultrasensitive and reliable nonenzymatic electrochemical glucose sensor has been developed, which is based on mesoporous Au/Pt nanodendrites prepared by a facile route aided by ultrasonication under mild conditions. The fabricated glucose sensor is capable of detecting glucose with a wide linear region of 0.01–100 μM and an ultralow detection limit of 1 nM. The higher sensitivity and ca ...
DOI:
10.1039/c5ra16953d

6. Catechin assisted phase and shape selection for luminescent LaVO₄ zircon

Author:
Tamilmani, Vairapperumal; Sreeram, Kalarical Janardhanan; Nair, Balachandran Unni
Source:
RSC advances 2015 v.5 no.100 pp. 82513-82523
ISSN:
2046-2069
Subject:
EDTA (chelating agent); catechin; europium; ligands; luminescence; medicine; optical properties; polyphenols; samarium; zircon
Abstract:
... Potential applications of rare earth orthovanadates are increasing day-by-day owing to the possibilities of tuning the optical properties through a host of facile modifications. This has brought about the need to look at orthovanadates beyond those of Y, Gd and Lu. Amongst the possibilities, synthesis of LaVO₄, with or without doping in its metastable zircon phase against the monoclinic phase whic ...
DOI:
10.1039/c5ra17800b

7. Correction: Intriguing properties of unusual silicon nanocrystals

Author:
Manzetti, Sergio; Lu, Tian; Behzadi, Hadi; Esrafili, Mehdi D.; Thi Le, Ha-Linh; Vach, Holger
Source:
RSC advances 2015 v.5 no.100 pp. 82631
ISSN:
2046-2069
Subject:
nanocrystals; silicon
Abstract:
... Correction for ‘Intriguing properties of unusual silicon nanocrystals’ by Sergio Manzetti et al., RSC Adv., 2015, 5, 78192–78208. ...
DOI:
10.1039/c5ra90089a

8. Differentiation of multi-metal ions based on fluorescent dual-emission carbon nanodots

Author:
Qu, Fei; Wang, Shuai; Liu, Dongya; You, Jinmao
Source:
RSC advances 2015 v.5 no.100 pp. 82570-82575
ISSN:
2046-2069
Subject:
aluminum; bismuth; carbon; drugs; fluorescence; ions; iron; ligands; nanotechnology; sensors (equipment)
Abstract:
... A new fluorescent nanosensor for the selective determination and differentiation of Fe³⁺, Bi³⁺ and Al³⁺ was reported based on dual-emission carbon nanodots (DECNDs), which contained blue emitters (λₑₓ = 315 nm, λₑₘ = 386 nm) and yellow emitters (λₑₓ = 365 nm, λₑₘ = 530 nm). In this assay, Fe³⁺ could quench the fluorescence of the blue emitters; Bi³⁺ and Al³⁺ could be differentiated by the yellow e ...
DOI:
10.1039/c5ra16373k

9. Drying behavior and thermo-gravimetrical kinetic analysis of foam-pretreated sewage sludge

Author:
Chen, Ting; Yang, Zhao-Hui; Huang, Jing; Xu, Rui; Xu, Hai-yin; Song, Peipei; Cao, Liang
Source:
RSC advances 2015 v.5 no.100 pp. 82227-82236
ISSN:
2046-2069
Subject:
activation energy; additives; calcium oxide; combustion; drying; drying temperature; energy; foaming; heat; kinetics; sewage sludge; sodium hydroxide; thermogravimetry; water content; whipping
Abstract:
... An innovative pretreatment technology, in which CaO was jointly added with NaOH followed by appropriate mechanical whipping, was investigated for the foaming and drying of sewage sludge (SS). Foaming efficiency, appropriate density of the best drying performance and drying temperature were examined. Considering high foaming efficiency and low energy consumption, the optimal mixture was found to be ...
DOI:
10.1039/c5ra11479a

10. Effect of chemically reduced graphene oxide on the isothermal and non-isothermal phase separation behavior of poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) binary polymer blends

Author:
Lin, Chao-ying; Liu, Ting; Zuo, Min; Li, Hui-hui; Chen, Qi; Zheng, Qiang
Source:
RSC advances 2015 v.5 no.100 pp. 82259-82270
ISSN:
2046-2069
Subject:
graphene oxide; heat; light scattering; polymethylmethacrylate; separation; temperature; viscosity
Abstract:
... The effect of a small amount of chemically reduced graphene oxide (CRGO) on the isothermal and non-isothermal phase separation behavior of poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) (PMMA/SAN) blends was investigated by using time-resolved small angle laser light scattering (SALLS). During the non-isothermal process, a quantitative logarithm function can be established to describe th ...
DOI:
10.1039/c5ra16036g

11. Exploring the mechanism of isomerisation and water-migration in the water-complexes of amino-acid l-proline: electrostatic potential and vibrational analysis

Author:
Kaur, Gurpreet; Vikas,
Source:
RSC advances 2015 v.5 no.100 pp. 82587-82604
ISSN:
2046-2069
Subject:
Gibbs free energy; Raman spectroscopy; catalytic activity; gases; hydrogen bonding; isomerization; proline; quantum mechanics; spectral analysis; zwitterions
Abstract:
... Chemical pathways for the gas-phase isomerisation between the four lowest-lying conformers of amino acid l-proline are proposed using the computations performed through the advanced quantum-mechanical methods like Hartree–Fock, density functional and coupled cluster theories. Besides this, the water-migration pathways in the complexes of l-proline with a single-water molecule are presented. The co ...
DOI:
10.1039/c5ra06088e

12. Graphitic carbon nanocage modified electrode for highly sensitive and selective detection of dopamine

Author:
Huang, Yi Hong; Chen, Jian Hua; Sun, Xue; Su, Zhen Bo; Hu, Shi Rong; Weng, Wen; Huang, Yang; Wu, Wen Bing; San He, Ya
Source:
RSC advances 2015 v.5 no.100 pp. 82623-82630
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray photoelectron spectroscopy; catalytic activity; chemical structure; detection limit; dopamine; electrical conductivity; electrochemistry; glassy carbon electrode; graphene; transmission electron microscopy
Abstract:
... In this study, graphitic carbon nanocages (CNCs) with high electrical conductivity were prepared by a solvothermal reaction. Transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and Raman spectroscopy were performed to characterize the morphology and structure of the CNCs. Due to their specific chemical structure, the CNCs provided the modifie ...
DOI:
10.1039/c5ra15200c

13. Highly efficient red phosphor Cs₂GeF₆:Mn⁴⁺ for warm white light-emitting diodes

Author:
Wang, Zhengliang; Zhou, Yayun; Liu, Yong; Zhou, Qiang; Luo, Lijun; Tan, Huiying; Zhang, Qiuhan; Chen, Guo; Peng, Jinhui
Source:
RSC advances 2015 v.5 no.100 pp. 82409-82414
ISSN:
2046-2069
Subject:
X-ray diffraction; atomic absorption spectrometry; cation exchange; color; differential scanning calorimetry; emissions factor; energy-dispersive X-ray analysis; light emitting diodes; luminescence; manganese; optical properties; reflectance spectroscopy; scanning electron microscopy; spectrometers; temperature; thermal stability; thermogravimetry; white light
Abstract:
... Red phosphor Cs₂GeF₆:Mn⁴⁺ has been synthesized by the cation exchange method. The as-prepared phosphor was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectrometer (EDS), atomic absorption spectrophotometer (AAS), thermogravimetry (TG) and differential scanning calorimetry (DSC). Its optical properties were investigated by photo-luminescenc ...
DOI:
10.1039/c5ra18070h

14. Interface induced transition from bipolar resistive switching to unipolar resistive switching in Au/Ti/GaOₓ/NiOₓ/ITO structures

Author:
Chu, X. L.; Wu, Z. P.; Guo, D. Y.; An, Y. H.; Huang, Y. Q.; Guo, X. C.; Cui, W.; Li, P. G.; Li, L. H.; Tang, W. H.
Source:
RSC advances 2015 v.5 no.100 pp. 82403-82408
ISSN:
2046-2069
Subject:
ambient temperature; gold
Abstract:
... We report the transition from bipolar resistive switching (BRS) to unipolar resistive switching (URS) in the Au/Ti/GaOₓ/NiOₓ/ITO device at room temperature. After the proper soft breakdown of the p–n junctions (GaOₓ/NiOₓ), the switching operation could be easily transferred from BRS to URS mode. The BRS and URS behaviors are possibly related to the interfacial variation of the Ti/GaOₓ Schottky jun ...
DOI:
10.1039/c5ra12762a

15. Large strain response and fatigue-resistant behavior in lead-free Bi₀.₅(Na₀.₈₀K₀.₂₀)₀.₅TiO₃–(K₀.₅Na₀.₅)MO₃ (M = Sb, Ta) ceramics

Author:
Hao, Jigong; Xu, Zhijun; Chu, Ruiqing; Li, Wei; Du, Juan; Fu, Peng
Source:
RSC advances 2015 v.5 no.100 pp. 82605-82616
ISSN:
2046-2069
Subject:
activation energy; actuators; ambient temperature; antimony; ceramics; electrical conductivity; phase transition
Abstract:
... (1 − x)Bi₀.₅(Na₀.₈₀K₀.₂₀)₀.₅TiO₃–x(K₀.₅Na₀.₅)MO₃ (M = Sb, Ta) (BNKT20–KNM100x) lead-free piezoelectric ceramics were designed and fabricated using a conventional fabrication process to achieve large strain response in BKNT20-based ceramics. The KNM substitution was found to induce a transition from ferroelectric to relaxor pseudocubic phase, and such transition is accompanied with the significant ...
DOI:
10.1039/c5ra13126j

16. Metal-free site-selective C–N bond-forming reaction of polyhalogenated pyridines and pyrimidines

Author:
Wang, Lei; Liu, Ning; Dai, Bin
Source:
RSC advances 2015 v.5 no.100 pp. 82097-82111
ISSN:
2046-2069
Subject:
amines; chemical bonding; chlorides; chlorine; fluorine; nitrogen; pyridines; pyrimidines
Abstract:
... This paper presents a metal-free method for highly site-selective C–N bond-forming reaction of polyhalogenated pyridines and pyrimidines. The preferred coupling site can be tuned from the fluorine group bearing the N-heterocyclic ring to the chlorine group when changing from the pyridine ring to the pyrimidine ring. A wide array of halogenated pyridines preferentially reacted with amines at the fl ...
DOI:
10.1039/c5ra18653f

17. One-step in situ synthesis of single aligned graphene–ZnO nanofiber for UV sensing

Author:
Sahatiya, Parikshit; Badhulika, Sushmee
Source:
RSC advances 2015 v.5 no.100 pp. 82481-82487
ISSN:
2046-2069
Subject:
X-ray diffraction; economic sustainability; electrodes; electrons; gold; graphene; nanofibers; nanogold; scanning electron microscopy; temperature; ultraviolet radiation; zinc oxide
Abstract:
... Here, we report a simple, one-step method for the in situ synthesis and alignment of a single graphene-doped zinc oxide (Gr–ZnO) composite nanofiber fabricated by electrospinning across electrodes and its subsequent use for ultraviolet (UV) detection. The study involves the optimization of the calcination temperature and time-dependent electrospinning for alignment of the Gr–ZnO composite nanofibe ...
DOI:
10.1039/c5ra15351d

18. Strong chemisorption of CO on M@Bₙ⁻ (M = Co, Ir, Rh, Ru, Ta, Nb, n = 8–10) clusters: an implication for wheel boron clusters as CO gas detectors

Author:
Ren, Cong; Wang, Weihua; Guo, Chao; Li, Ping; Liu, Yuxia; Bi, Siwei; Li, Zhen; Sun, Qiao
Source:
RSC advances 2015 v.5 no.100 pp. 82524-82530
ISSN:
2046-2069
Subject:
adsorption; boron; carbon dioxide; carbon monoxide; cobalt; deformation; density functional theory; detectors; energy; iridium; methane; molecular dynamics; nitrogen; oxygen; rhodium; ruthenium
Abstract:
... In this study, the adsorption behavior of carbon monoxide (CO) gas molecules on anionic M@Bₙ⁻ (M = Co, Ir, Rh, Ru, Ta, Nb, n = 8–10) clusters has been systematically investigated by employing density functional theory (DFT). It was found that CO adsorption on boron clusters proceeds spontaneously and easily, accompanied with a dramatic structural deformation for the corresponding M@Bₙ⁻ clusters. L ...
DOI:
10.1039/c5ra15151a

19. Synergistic interactions between POSS and fumed silica and their effect on the properties of crosslinked PDMS nanocomposite membranes

Author:
Rezakazemi, Mashallah; Vatani, Ali; Mohammadi, Toraj
Source:
RSC advances 2015 v.5 no.100 pp. 82460-82470
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; carbon dioxide; crosslinking; gases; hydrogen; methane; moieties; nanocomposites; nanoparticles; propane; scanning electron microscopy; silica; silsesquioxanes; thermal stability; thermogravimetry
Abstract:
... A facile strategy for the synthesis of binary filler nanocomposite membranes containing fumed silica (FS) and octatrimethylsiloxy polyhedral oligomeric silsesquioxane (POSS) nanoparticles was proposed to prepare high performance PDMS–FS–POSS nanocomposite membranes. To fully explore the synergistic effect between the POSS and FS nanoparticles, thermal stability using thermo-gravimetric analysis (T ...
DOI:
10.1039/c5ra13609a

20. Synthesis and application of fatty acid derived templates for the preparation of mesostructured silica material

Author:
Pirez, C.; Stoclet, G.; Lebarbé, T.; Desset, S.; Dumeignil, F.; Katryniok, B.
Source:
RSC advances 2015 v.5 no.100 pp. 82488-82491
ISSN:
2046-2069
Subject:
castor oil; fatty acid methyl esters; hot water treatment; imidazoles; linseed oil; nitrogen; oleic acid; porous media; salts; silica; transesterification; transmission electron microscopy
Abstract:
... Bio-Organic-Salts (BOSs) synthesized from fatty acid methyl esters (FAMESs) have been developed for use as a bio-derived template for mesostructured material. Fatty acid derived imidazolium salts were prepared from very high oleic acid (VHOSO), linseed oil, and castor oil by a three-step synthesis involving transesterification, amidation and quaternisation. The as prepared BOSs were successfully a ...
DOI:
10.1039/c5ra19495d