Preparation of CdS Nanoparticles with Reverse Micelle Method and Photo-degradation of Malachite Green Dye

doi:10.3724/SP.J.1077.2010.10305

Abstract

Abstract: Cadmium sulfide(CdS) nanoparticles with efficient photocatalytic activity were synthesized using water/CTMAB/n-butyl alcohol/n-heptanes reverse micelle system. The particles exhibited various photocatalytic activities with the different ω values (ω = [Water]/[CTMAB] = 25, 35, 50), and the optimal ω value was 25. Based on the X-ray diffraction (XRD) and transmission electron microscope (TEM) analysis, CdS nanoparticles were ascribed to the cubic sphalerite and the average size of CdS particle (ω=25) was about merely 9nm. Moreover, the ω values could directly affect the particle size and electrical property of CdS nanoparticles by means of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Under visible light (λ≥420nm) irradiation, Malachite Green (MG) was used as a probe to investigate the effect of preparation conditions on photocatalytic activity of CdS nanoparticles. It can be concluded that MG could fade out within 70min and attain the 50% mineralization after 30h under visible light irradiation, and the degradation process mainly referred to the hydroxyl radical (OH) and H₂O₂.

Key words: CdS, reverse micelles, photocatalytic degradation, mechanism

CLC Number:

O611
X507

HE Yan, WANG Pan, DENG An-Ping, YANG Jing, HUANG Ying-Ping, YANG Yong. Preparation of CdS Nanoparticles with Reverse Micelle Method and Photo-degradation of Malachite Green Dye[J]. Journal of Inorganic Materials, 2010, 25(11): 1221-1227.

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