Photo degradation of synthetic dyes using cadmium sulfide nanoparticles synthesized in the presence of different capping agents

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• 作者：Ravi Kant Upadhyay ; Meenakshi Sharma ; Deepesh Kumar Singh ; S.S. Amritphale ; Navin Chandra ; ^{navinchandrarrl@yahoo.com}
• 关键词：Capping agents ; Photo-catalyst ; CdS nanoparticles ; Synthetic dyes&rsquo ; photo-degradation ; Water color removal
• 刊名：Separation and Purification Technology
• 出版年：2012
• 期刊代码：78_13835866
• 类别：ce
• 出版时间：22 March, 2012
• 卷：88
• 期：Complete
• 页码：39-45
• 文件大小：1097 K

摘要

Photo-degradation of synthetic dyes by cadmium sulfide nano-particles synthesized by micro-emulsion/arrested precipitation routes using thioglycolic acid; potassium pyrosulfate and disodium salt of ethylene diamine tetra acetic acid (EDTA) as capping agents have been investigated. Synthesized nanoparticles have been characterized by X-ray diffraction, thermo-gravimetric analysis, high-resolution transmission electron microscopy, BET surface area analysis and UV-Vis spectro-photometry. The synthesized cadmium sulfide nano particles are observed to be a mixture of cubic and hexagonal phases and have crystallite size and surface area of 3.7, 6.8 and 13.9 nm and 32.11, 29.54 and 8.63 m²/g for thioglycolic acid, potassium pyrosulfate and EDTA capping agents, respectively. As expected, the photo-catalytic efficiency of nano-particles for degradation of dyes is observed to increase with increase in surface area (decrease in particulate size).