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1. Aromatic alkyne insertion into six-membered cyclometalated pyridine complexes of iridium: different insertion modes and structurally novel products

Author:
Chu, Xiaodan; Zhang, Shaowei; Wang, Zhuo; Li, Tongyu; Zhu, Bolin
Source:
RSC advances 2018 v.8 no.13 pp. 7164-7172
ISSN:
2046-2069
Subject:
X-ray diffraction; alkynes; bromine; chemical structure; iridium; methanol; pyridines
Abstract:
... Reactions of 2-benzoylpyridine or 2-benzylpyridine with [Cp*MCl₂]₂ (M = Ir, Rh) have been carried out in the presence of NaOAc in refluxing methanol, which form the corresponding six-membered cyclometalated products (1–3) except for the reaction of 2-benzylpyridine with [Cp*RhCl₂]₂. Insertion reactions of two six-membered cyclometalated pyridine iridium complexes (1 and 2) with terminal or interna ...
DOI:
10.1039/c7ra13547e

2. Influence of substrate on the structure of predominantly anatase TiO₂ films grown by reactive sputtering

Author:
Brandt, Iuri S.; Plá Cid, Cristiani C.; Azevedo, Carlos G. G.; Pereira, André L. J.; Benetti, Luana C.; Ferlauto, Andre S.; Dias da Silva, José H.; Pasa, André A.
Source:
RSC advances 2018 v.8 no.13 pp. 7062-7071
ISSN:
2046-2069
Subject:
X-ray diffraction; aluminum; crystals; lanthanum; microstructure; optical properties; radio waves; silica; silicon; spectroscopy; texture; titanium dioxide; transmission electron microscopy
Abstract:
... TiO₂ films are grown on LaAlO₃ (001), Si (100) and SiO₂ substrates by reactive radio frequency sputtering. X-ray diffraction (XRD) pole figures revealed important characteristics about the texture and phase distribution on those films. Combined with spectroscopic ellipsometry, the pole figures allowed the analysis of the growth characteristics over the whole volume of the layers. Details in the mi ...
DOI:
10.1039/c7ra10974a

3. In situ green oxidation synthesis of Ti³⁺ and N self-doped SrTiOₓNy nanoparticles with enhanced photocatalytic activity under visible light

Author:
Liu, Jiandong; Ma, Xiaohong; Yang, Lina; Liu, Xingliang; Han, Aixia; Lv, Haitang; Zhang, Chao; Xu, Shiai
Source:
RSC advances 2018 v.8 no.13 pp. 7142-7151
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; absorption; catalysts; crystal structure; hydrogen peroxide; irradiation; methylene blue; models; nanoparticles; oxidation; photocatalysis; reflectance spectroscopy; scanning electron microscopy; titanium; transmission electron microscopy; wastewater
Abstract:
... A simple in situ green oxidation synthesis route was developed to prepare Ti³⁺ and N self-doped SrTiOₓNy nanoparticles using TiN and H₂O₂ as precursors. X-ray diffraction (XRD), scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) were used to characterize the crystallinity, structure and morphology. X-ray photoelectron spectroscopy (XPS) tests confirmed ...
DOI:
10.1039/c7ra13523h

4. Suppressing self-discharge of Li–B/CoS₂ thermal batteries by using a carbon-coated CoS₂ cathode

Author:
Xie, Youlong; Liu, Zhijian; Ning, Huilong; Huang, Haifeng; Chen, Libao
Source:
RSC advances 2018 v.8 no.13 pp. 7173-7178
ISSN:
2046-2069
Subject:
X-ray diffraction; anodes; batteries; carbon; carbonization; cathodes; coatings; crystal structure; electrolytes; lithium; pyrolysis; sucrose; thermal stability
Abstract:
... Thermal batteries with molten salt electrolytes are used for many military applications, primarily as power sources for guided missiles. The Li–B/CoS₂ couple is designed for high-power, high-voltage thermal batteries. However, their capacity and safe properties are influenced by acute self-discharge that results from the dissolved lithium anode in molten salt electrolytes. To solve those problems, ...
DOI:
10.1039/c7ra13071f

5. Copper-doped lanthanum manganite La₀.₆₅Ce₀.₀₅Sr₀.₃Mn₁₋ₓCuₓO₃ influence on structural, magnetic and magnetocaloric effects

Author:
Chebaane, M.; Bellouz, R.; Oumezzine, Ma.; Hlil, E. K.; Fouzri, A.
Source:
RSC advances 2018 v.8 no.13 pp. 7186-7195
ISSN:
2046-2069
Subject:
Raman spectroscopy; X-ray diffraction; ambient temperature; copper; entropy; ions; lanthanum; magnetic properties; magnetism; manganese; nanocrystals; phase transition
Abstract:
... Bulk nanocrystalline samples of La₀.₆₅Ce₀.₀₅Sr₀.₃Mn₁₋ₓCuₓO₃ (0 ≤ x ≤ 0.15) manganites are prepared by the sol–gel based Pechini method. The effect of the substitution for Mn with Cu upon the structural and magnetic properties has been investigated by means of X-ray diffraction (XRD), Raman spectroscopy and dc magnetization measurements. The structural parameters obtained using Rietveld refinement ...
DOI:
10.1039/c7ra13244a

6. Fluorescence control of chitin and chitosan fabricated via surface functionalization using direct oxidative polymerization

Author:
Phung Hai, Thien An; Sugimoto, Ryuichi
Source:
RSC advances 2018 v.8 no.13 pp. 7005-7013
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; chitin; chitosan; composite polymers; crystal structure; ferric chloride; fluorenes; fluorescence; fluorescence emission spectroscopy; moieties; oxidants; polymerization; thermal stability; thermogravimetry; ultraviolet-visible spectroscopy
Abstract:
... The copolymer of 3-hexylthiophene (3HT) and fluorene (F) was directly grafted onto chitin and chitosan using FeCl₃ as an oxidant. The properties of the grafted chitin/chitosan were characterized by Fourier transform infrared (FT-IR) spectroscopy, UV-Vis spectroscopy, fluorescence spectroscopy, X-ray diffraction analysis, thermogravimetric analysis (TGA), transmission electron microscopy-energy dis ...
DOI:
10.1039/c8ra00287h

7. On the morphological, structural and electrochemical properties of entangled Cu-filled carbon nano-onions

Author:
Zhang, X.; Medranda, D.; Borowiec, J.; Yan, K.; Zhang, J.; Wang, S.; Boi, F. S.
Source:
RSC advances 2018 v.8 no.13 pp. 6870-6877
ISSN:
2046-2069
Subject:
X-ray absorption spectroscopy; X-ray diffraction; copper; copper nanoparticles; dielectric spectroscopy; electrical resistance; electrochemistry; fullerene; pyrolysis; sublimation; transmission electron microscopy; vapors
Abstract:
... In this work we demonstrate an advanced chemical vapour synthesis approach in which the synthesis of Cu-filled carbon nano-onions (CNOs) is achieved by direct sublimation and pyrolysis of a not previously used precursor, namely chloro(1,5-cyclooctadiene)copper(i) dimer. The cross-sectional morphology and filling-ratio of the as grown CNOs were characterized by detailed transmission electron micros ...
DOI:
10.1039/c7ra12626c

8. Photocatalytic activity of BiFeO₃/ZnFe₂O₄ nanocomposites under visible light irradiation

Author:
Safizade, B.; Masoudpanah, S. M.; Hasheminiasari, M.; Ghasemi, A.
Source:
RSC advances 2018 v.8 no.13 pp. 6988-6995
ISSN:
2046-2069
Subject:
Raman spectroscopy; X-ray diffraction; absorption; ferrimagnetic materials; irradiation; methylene blue; nanocomposites; nitrogen; photocatalysis; photoluminescence; photolysis; reflectance spectroscopy; surface area; zinc
Abstract:
... Herein, BiFeO₃/ZnFe₂O₄ nanocomposites were synthesized via a glyoxylate precursor method using a two-pot approach. Phase evolution is investigated by X-ray diffraction and Raman spectroscopy, which confirm that no impurity phases are formed between BiFeO₃ and ZnFe₂O₄ following calcination at 600 °C. The specific surface area characterized by N₂ adsorption–desorption isotherms decreases from 30.56 ...
DOI:
10.1039/c7ra13380d

9. Synthesis, characterization and olefin polymerization behaviors of phenylene-bridged bis-β-carbonylenamine binuclear titanium complexes

Author:
Luo, Derong; Zeng, Yi; Chen, Xiong; Xia, Ping; Xie, Guangyong; You, Qingliang; Zhang, Li; Li, Tingcheng; Li, Xiangdan; Zhang, Aiqing
Source:
RSC advances 2018 v.8 no.13 pp. 6954-6964
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; catalysts; catalytic activity; copolymerization; crystal structure; enols; ethylene; ligands; molecular weight; nuclear magnetic resonance spectroscopy; olefin; polyethylene; thermal stability; titanium
Abstract:
... Binuclear and multinuclear complexes have attracted much attention due to their unique catalytic performances for olefin polymerization compared with their mononuclear counterparts. In this work, a series of phenyl-bridged bis-β-carbonylenamine [O⁻NSᴿ] (R = alkyl or phenyl) tridentate ligands and their binuclear titanium complexes (Ti²L₁–Ti²L₅) were synthesized and characterized by ¹H NMR, ¹³C NMR ...
DOI:
10.1039/c8ra00071a

10. Effects of calcination and reduction temperature on the properties of Ni-P/SiO₂ and Ni-P/Al₂O₃ and their hydrodenitrogenation performance

Author:
Shao, Mingqiang; Cui, Haitao; Guo, Shaoqing; Zhao, Liangfu; Tan, Yisheng
Source:
RSC advances 2018 v.8 no.13 pp. 6745-6751
ISSN:
2046-2069
Subject:
X-ray diffraction; catalysts; catalytic activity; nickel; nitrogen; phosphides; quinoline; silica; temperature; titration; transmission electron microscopy
Abstract:
... A series of SiO₂-supported and γ-Al₂O₃-supported nickel phosphides were prepared by temperature-programmed reduction (TPR) with different calcination and reduction temperatures. The prepared catalysts were characterized by XRD, BET, H₂-TPR, CO titration and HRTEM. The crystal phase and CO uptake content were influenced by calcination and reduction temperature. The catalytic performance of various ...
DOI:
10.1039/c7ra11907k

11. Low temperature CO oxidation catalysed by flower-like Ni–Co–O: how physicochemical properties influence catalytic performance

Author:
Yi, Yunan; Zhang, Pan; Qin, Zuzeng; Yu, Chuxuan; Li, Wei; Qin, Qiuju; Li, Bin; Fan, Minguang; Liang, Xin; Dong, Lihui
Source:
RSC advances 2018 v.8 no.13 pp. 7110-7122
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray fluorescence spectroscopy; X-ray photoelectron spectroscopy; carbon monoxide; catalysts; catalytic activity; cobalt; cobalt oxide; granules; ions; nickel; nickel oxide; oxidation; oxygen; physicochemical properties; porous media; scanning electron microscopy; surfactants; temperature; texture; transmission electron microscopy
Abstract:
... In this work, mesoporous Ni–Co composite oxides were synthesized by a facile liquid-precipitation method without the addition of surfactant, and their ability to catalyse a low temperature CO oxidation reaction was investigated. To explore the effect of the synergetic interaction between Ni and Co on the physicochemical properties and catalytic performance of these catalysts, the as-prepared sampl ...
DOI:
10.1039/c7ra12635b

12. 12-Molybdophosphoric acid anchored on aminopropylsilanized magnetic graphene oxide nanosheets (Fe₃O₄/GrOSi(CH₂)₃–NH₂/H₃PMo₁₂O₄₀): a novel magnetically recoverable solid catalyst for H₂O₂-mediated oxidation of benzylic alcohols under solvent-free conditions

Author:
Farhadi, Saeed; Hakimi, Mohammad; Maleki, Mansoureh
Source:
RSC advances 2018 v.8 no.13 pp. 6768-6780
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; X-ray diffraction; anions; benzaldehyde; benzyl alcohol; catalysts; catalytic activity; electron transfer; energy-dispersive X-ray analysis; graphene oxide; hydrogen peroxide; ketones; magnetic materials; magnetism; nanocomposites; nanosheets; nitrogen; oxidation; scanning electron microscopy; surface area
Abstract:
... In this work, 12-molybdophosphoric acid (H₃PMo₁₂O₄₀, HPMo) was chemically anchored onto the surface of aminosilanized magnetic graphene oxide (Fe₃O₄/GrOSi(CH₂)₃–NH₂) and was characterized using different physicochemical techniques, such as powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, energy-dispersive X-ray analysis (EDX), scanning electron m ...
DOI:
10.1039/c8ra00312b

13. Novel N-doped ZrO₂ with enhanced visible-light photocatalytic activity for hydrogen production and degradation of organic dyes

Author:
Wang, Yuanyang; Zhang, Yinghua; Lu, Haiqiang; Chen, Yanxin; Liu, Zhenmin; Su, Shen; Xue, Yongbing; Yao, Jianfeng; Zeng, Hongbo
Source:
RSC advances 2018 v.8 no.13 pp. 6752-6758
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; crystal structure; dyes; ethylenediamines; hydrogen production; nitrogen; organic wastes; photocatalysis; photocatalysts; photoluminescence; photoperiod; semiconductors; sol-gel processing; ultraviolet-visible spectroscopy; zirconium oxide
Abstract:
... Two new types of N-doped ZrO₂ photocatalysts ZON and AZON have been synthesized using ethylenediamine as the nitrogen source by a facile and low-cost sol–gel method. The N-doped ZrO₂ samples have been characterized using various techniques including X-ray diffraction (XRD), UV-Vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), photoluminescenc ...
DOI:
10.1039/c7ra12938f