ACS Sustainable Chemistry & Engineering
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2017
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IF 5.951
Yan Gao,Lu Ye,Shuyan Cao,Hu Chen,Yanan Yao,Jian Jiang,Licheng Sun
Perovskite hydroxide CoSn(OH)6 nanoparticles were synthesized and used for the first time in the photocatalytic reduction of CO2 to CO. Under mild reaction conditions and using [Ru(bpy)3](PF6)2 as the photosensitizer, a high photocatalytic efficiency of 19.3 μmol for CO evolution with a high selectivity of 86.46% was obtained. The photocatalytic activity and CO selectivity were further improved by adding weak Brönsted acids, as proton sources, to the system.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2025
·Vol. 27
·期 2
·1-11
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IF 2.6
Zhang Enlei,Chen Jiaojiao,Xu Rui,Song Xiaowen,Zhang Bengui,Wang Guosheng
In this work, the different shaped CoSn(OH) 6 nanocrystallines were prepared by hydrothermal method. The morphology, microstructure, and composition of the prepared nanocrystallines were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and other methods. The optical properties of CoSn(OH) 6 nanocrystallines with different morphologies were analyzed using UV–vis DRS. With the reduction of 4-nitrophenol as a model reaction, the photocatalytic performance of CoSn(OH) 6 nanocrystallines with the different morphologies was investigated. The results show that the CoSn(OH) 6 nanorings significantly improved the photocatalytic reduction 4-nitrophenol performance. The conversion rate of 4-nitrophenol reached 94% within 6 min. Finally, a potential mechanism for the photocatalytic process of CoSn(OH) 6 nanorings is discussed.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2017
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IF 9.446
Xiahui Lin,Yilin Gao,Min Jiang,Yongfan Zhang,Yidong Hou,Wenxin Dai,Sibo Wang,Zhengxin Ding
Herein, we report the facile synthesis of uniform perovskite hydroxide CoSn(OH) 6 nanocubes and their first use as noble-metal-free, highly efficient and stable catalysts for the deoxygenative reduction of CO 2 to CO with visible light. The CoSn(OH) 6 sample is synthesized through a one-pot co-precipitation method and fully characterized by various techniques including XRD, FTIR, FESEM, TEM, EDX, EDX-mappings, XPS, DRS, and N 2 sorption measurements. The CoSn(OH) 6 solid is found by theoretical calculations to be capable of absorbing and activating CO 2 molecules on the (100) surface. Under the optimal reaction conditions, the CoSn(OH) 6 catalyst exhibits a high CO 2 reduction activity with visible light irradiation, affording a CO generation rate of 18.7 μmol h −1 . The stability and reusability of the CoSn(OH) 6 catalyst for photocatalytic CO 2 reduction are solidly confirmed. Results of in situ photoluminescence spectroscopy and photocurrent response characterizations indicate that the CoSn(OH) 6 catalyst can efficiently promote the separation and transfers of photoexcited charge carriers during photocatalysis, and eventually leading to obviously enhanced CO 2 photoreduction performance. Moreover, a possible mechanism for the photocatalytic CO 2 reduction reaction is also proposed based on the results of activity evaluation and photo-/electro-chemical measurements.
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高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2024
·Vol. 112
·期 1
·152-161
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IF 2.3
Zhang Enlei,Chen Jiaojiao,Xu Rui,Song Xiaowen,Zhang Bengui,Wang Guosheng
Catalytic reduction of 4-nitrophenol (4-NP) into 4-aminophenol (4-AP) is an important method for treating toxic nitroaromatic pollutant. In this work, amorphous CoSn(OH) 6 nanocubes were synthesized by coprecipitation and calcination methods for 4-NP photocatalytic reduction. The crystal structure, morphology and optical property of the samples were characterized by XRD, SEM, TEM, XPS, and UV–vis DRS. The amorphous CoSn(OH) 6 nanocubes showed excellent photocatalytic performance in 4-NP reduction. The effects of catalyst dosage, 4-NP concentration, and sodium borohydride concentration on the conversion rate of 4-NP were investigated. The results showed that the conversion rate of 4-NP could reach 98.38% in 15 min at room temperature under visible light irradiation. After five cycles of experiments, the conversion rate of 4-NP remained above 90%, indicating the good catalytic stability of the amorphous CoSn(OH) 6 nanocubes. Finally, the mechanisms of photocatalytic reduction on amorphous CoSn(OH) 6 nanocubes are also discussed. The successful preparation of amorphous CoSn(OH) 6 nanocubes may enable the widespread use of amorphous polymetallic oxides for the removal of nitrophenols from wastewater in the future. Graphical Abstract Amorphous CoSn(OH) 6 nanocubes exhibit superior photocatalytic reduction 4-NP to 4-AP performance.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
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2022
·Vol. 147
·期 17
·9431-9450
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IF 4.755
Liu Fu-Ya,Zhou Xue-Ling,Zhao He,Hu Wei-Dong,Xu Jian-Zhong,Jiao Yun-Hong,Qu Hong-Qiang
The synergistic effect and mechanism of the spherical CoSn(OH) 6 (T-CHS) and ammonium polyphosphate (APP) on epoxy resin (EP) were investigated by limiting oxygen index (LOI), vertical combustion test (UL-94), cone calorimeter, tensile machine, thermogravimetric analysis-coupled with a Fourier transform infrared spectrometer (TGA/FTIR), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy, and Raman spectrometer. The results indicate that when the mass ratio of APP and T-CHS is 5.9:0.1 and 5.5:0.5, respectively, there is a synergistic effect between APP and T-CHS, and the flame retardant EP samples could pass the V-0 level of UL-94 test and their tensile properties have little difference to that of the blank EP. Compared with the blank EP, the total heat release and total smoke production of EP/5.9APP/0.1 T-CHS are decreased by 25% and 26%, respectively. TGA/FTIR results of the EP samples under N 2 atmosphere indicate the NH 3 production of EP/5.9APP/0.1 T-CHS is decreased by 47% and the CO 2 and H 2 O production is increased by 991% and 210%, respectively, when compared with that of the blank EP. APP and T-CHS show a good synergistic effect on promoting the retention of C, Co, Sn, and N elements in the char residues. The char residues of EP/5.9APP/0.1 T-CHS and EP/5.5APP/0.5 T-CHS samples contain Co 3 O 4 , CoO, SnO, SnO 2 , oxides of phosphorus, and Sn element, which form a more compact physical barrier.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
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