Microwave-Assisted Preparation of CdS Nanoparticles in a Halide-Free Ionic Liquid and Their Photocatalytic Activities  

作　　者：M.ESMAILI A.HABIBI-YANGJEH 

机构地区：[1]Department of Chemistry,Faculty of Science,University of Mohaghegh Ardabili

出　　处：《催化学报》2011年第6期933-938,共6页

基　　金：supported by University of Mohaghegh Ardabili

摘　　要：A microwave-assisted (4-6 min) method was used for the preparation of CdS nanoparticles in 1-ethyl-3-methylimidazolium ethyl sulfate,a halide-free room-temperature ionic liquid (RTIL).The samples were characterized by powder X-ray diffraction,energy dispersive X-ray spectroscopy,and scanning electron microscopy.Diffuse reflectance spectra showed a 1.33 eV blue shift relative to bulk CdS.The photocatalytic activities of the nanoparticles for photodegradation of methylene blue (MB) using UV and visible light were measured.The photodegradation of MB decreased with calcination temperature.First order rate constants for the reaction under visible and UV irradiations over the nanoparticles prepared in the RTIL rich media were 5.4 and 2.5 higher,respectively,than the sample prepared in water.A microwave-assisted （4-6 min） method was used for the preparation of CdS nanoparticles in 1-ethyl-3-methylimidazolium ethyl sulfate,a halide-free room-temperature ionic liquid （RTIL）.The samples were characterized by powder X-ray diffraction,energy dispersive X-ray spectroscopy,and scanning electron microscopy.Diffuse reflectance spectra showed a 1.33 eV blue shift relative to bulk CdS.The photocatalytic activities of the nanoparticles for photodegradation of methylene blue （MB） using UV and visible light were measured.The photodegradation of MB decreased with calcination temperature.First order rate constants for the reaction under visible and UV irradiations over the nanoparticles prepared in the RTIL rich media were 5.4 and 2.5 higher,respectively,than the sample prepared in water.

关 键 词：固体超强碱 氧化钙 硝酸钾 氧化铝 氧化锆 氢氧化钾 硝酸钙 

分 类 号：O643.36[理学—物理化学]