反相胶束介质制备纳米CdS及可见光降解孔雀绿

doi:10.3724/SP.J.1077.2010.10305

无机材料学报 ›› 2010, Vol. 25 ›› Issue (11): 1221-1227.DOI: 10.3724/SP.J.1077.2010.10305

反相胶束介质制备纳米CdS及可见光降解孔雀绿

何燕¹, 王攀¹, 邓安平¹, 杨静¹, 黄应平¹, 杨勇²

(1. 艾伦·麦克德尔米德再生能源研究所, 三峡大学, 宜昌 443002; 2. 中国科学院, 上海硅酸盐研究所, 上海 200050)

收稿日期:2010-05-17 修回日期:2010-06-30 出版日期:2010-11-20 网络出版日期:2010-11-01
基金资助:
Project supported by the National Natural Science Foundation of China (20877048, 50701018); National Basic Research Programme(973) of China(2008CB417206); Excellent Scientist Fund in Hubei province (2005ABB030); Shanghai Nano-project (0952nm06600)

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

HE Yan¹, WANG Pan¹, DENG An-Ping¹, YANG Jing¹, HUANG Ying-Ping¹, YANG Yong ²

(1. Alan G. MacDiarmid Research Institute of Renewable Energy, Three Gorges University, Yichang 443002, China; 2. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academic of Sciences, Shanghai 200050, China)

Received:2010-05-17 Revised:2010-06-30 Published:2010-11-20 Online:2010-11-01
Supported by:
Project supported by the National Natural Science Foundation of China (20877048, 50701018); National Basic Research Programme(973) of China(2008CB417206); Excellent Scientist Fund in Hubei province (2005ABB030); Shanghai Nano-project (0952nm06600)

摘要/Abstract

摘要： 采用CTMAB/正丁醇/正庚烷/水四元反相胶束介质体系中直接沉淀法制备纳米CdS. 采用不同ω([H₂O]/[表面活性剂])条件制备的CdS光催化活性有所不同, 当ω值为25时, 所制备的纳米CdS光催化活性最高. 利用X射线衍射仪(XRD)、透射电镜(TEM)对CdS的晶型、尺寸进行表征, 结果显示, 反相胶束法制备的CdS为立方闪锌矿型, ω值为25条件下制备的CdS平均粒径为9nm, 且分散均匀. 采用循环伏安法(CV)和电化学交流阻抗法(EIS)研究了纳米CdS的电化学行为, 表明反相胶束法水量条件直接影响所制备的CdS粒径大小及电化学性质. 在可见光照射下(λ≥420nm), 光催化降解孔雀绿(Malachite Green, MG)为探针反应, 探讨了不同反相胶束体系的制备条件对CdS光催化活性的影响, 通过紫外-可见光谱(UV-Vis)和总有机碳仪(TOC)对光催化降解MG跟踪测定, 表明可见光照射下以水量25制备的CdS中性条件下在70min内可以使MG褪色完全, 反应30h后MG的矿化率达50%以上. 同时跟踪测定了降解过程中H₂O₂和羟基自由基(OH) 的变化, 表明CdS光催化机理涉及到OH历程.

关键词: CdS, 反相胶束法, 光催化降解, 机理

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

中图分类号:

O611
X507

何燕, 王攀, 邓安平, 杨静, 黄应平, 杨勇. 反相胶束介质制备纳米CdS及可见光降解孔雀绿[J]. 无机材料学报, 2010, 25(11): 1221-1227.

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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反相胶束介质制备纳米CdS及可见光降解孔雀绿

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

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