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Effect of sulfur source on photocatalytic degradation performance of CdS/MoS2 prepared with one-step hydrothermal synthesis

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Journal of Environmental Sciences 2018年第3期30卷 347-355页

作者： Yanfeng Wang Wei Chen Xiao Chen Huajun Feng Dongsheng Shen Bin Huang Yufeng Jia Yuyang Zhou Yuxiang Liang School of Environmental Science and Engineering Zhejiang Gongshang University Hangzhou 310012 China Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling Hangzhou 310012 China College of Environment Zhejiang University of Technology Hangzhou 310014 China

Cd S/Mo S2,an extremely efficient photocatalyst,has been extensively used in hydrogen photoproduction and pollutant *** S/Mo S2can be synthesized by a facile one-step hydrothermal ***,the effect of the sulfur source on the synthesis of Cd S/Mo S2via one-step hydrothermal methods has seldom been *** report herein a series of one-step hydrothermal preparations of Cd S/Mo S2using three different sulfur sources：thioacetamide,L-cysteine,and *** results revealed that the sulfur source strongly affected the crystallization,morphology,elemental composition and ultraviolet（UV）–visible-light-absorption ability of the Cd S/Mo *** the investigated sulfur sources,thioacetamide provided the highest visible-light absorption ability for Cd S/Mo S2,with the smallest average particle size and largest surface area,resulting in the highest efficiency in Methylene Blue（MB）*** photocatalytic activity of Cd S/Mo S2synthesized from the three sulfur sources can be arranged in the following order：*** reaction rate constants（k）for thioacetamide,L-cysteine,and thiourea were estimated to be 0.0197,0.0140,and 0.0084 min^（-1）,***,thioacetamide may be limited in practical application in terms of its price and toxicity,while L-cysteine is relatively economical,less toxic and exhibited good photocatalytic degradation performance toward MB.

关键词： CdSMo S2 sulfur sources One-step hydrothermal method Photocatalytic degradation

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Geological features and S isotope composition of tin deposit in Dachang ore district in Guangxi

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Transactions of Nonferrous Metals Society of China 2014年第9期24卷 2938-2945页

作者：成永生中南大学有色金属成矿预测教育部重点实验室长沙410083 中南大学地球科学与信息物理学院长沙410083 中国科学院地球化学研究所矿床地球化学国家重点实验室贵阳550002

The geological investigation of the Dachang ore field was carried out in detail, and the geological characteristics of the deposits, consisting of the Tongkeng and Dafulou deposits, were observed and researched systematically. It suggests that the mineralization types of Changpo ore are composed of cracking vein, thin vein, bedded vein and thin vein-net vein disseminated types. The cracking vein ore is usually lens-shaped in the vertical direction. The thin vein ore is always characterized by a stable trend and tendency. The bedded ore always occurs along the strata in the way of filling and metasomatism in the fracture system. In terms of Bali-longtoushan ore, it is characterized by complicated mineral components and a variety of minerals. More generally, ore textures consist of the anhedral-subhedral shapes and thin particle, and secondary with the interstitial texture, solid solution separation texture, dissolution texture, corona texture, and crushing texture, yet ore structures include the massive, veinlet, disseminated, banded, miarolitic, biological residual and brecciated structure. In addition, the sulfur isotopes of the metal sulfide were analyzed. The results show that the δ34S values of Tongkeng ore range from-0.30% to 1.38% with more dispersed characteristics, yet in terms of Dafulou ore, the δ34S values are from-0.15% to 0.22% which are characterized by more focused. This indicates that the sulfur isotope composition has large difference between the different deposits. The sulfur isotope values of the Dafulou ore are concentrated relatively, yet are dispersed for the Tongkeng ore. Likewise, there are also divergences of sulfur isotopes for the different minerals. The sulfur isotope values of pyrrhotine are dispersed, yet are homogeneous for pyrite. In short, the divergence of the sulfur isotope is reflected in both the different deposits and minerals, all of these may account for the difference of sulfur sources.

关键词： deposit geology sulfur isotope sulfur sources Dachang tin deposit

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