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.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2011年第6期933-938,共6页
基金
supported by University of Mohaghegh Ardabili
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
nanoparticle
cadmium sulfide
room-temperature ionic liquid
photocatalysis
methylene blue
