标题：CdS nanocrystals/TiO2/crosslinked chitosan composite: Facile preparation, characterization and adsorption-photocatalytic properties作者：Zhu, Huayue; Jiang, Ru; Xiao, Ling;Liu, Li; Cao, Chunhua; Zeng, Guangming
来源出版物：APPLIED SURFACE SCIENCE 卷：273 页：661-669 DOI：10.1016/j.apsusc.2013.02.106 出版年：MAY 15 2013
摘要：CdS nanocrystals deposited on TiO2/crosslinked chitosan composite (CdS/TiO2/CSC) were prepared in an attempt to photocatalyze decolorization of water soluble azo dye in aqueous solution under simulated solar light irradiation. CdS/TiO2/CSC was characterized by X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), and scanning electron microscopy (SEM). The characterization results proved that CdS nanocrystals has successfully been deposited on/in TiO2/crosslinked chitosan composite. The adsorption ability of CdS/TiO2/CSC was approximately 2.66 mg methyl orange (a typical water soluble azo dye) per gram. The photocatalytic decolorization of methyl orange solution reached 99.1% by CdS/TiO2/CSC after simulated solar light irradiation for 210 min. Kinetics analysis indicated that photocatalytic decolorization of methyl orange solution by CdS/TiO2/CSC obeyed first-order kinetic Langmuir-Hinshelwood mechanism (R-2 > 0.997). CdS/TiO2/CSC exhibited enhanced photocatalytic activity under simulated solar light irradiation compared with photocatalysts reported before and the photocatalytic activity of CdS/TiO2/CSC maintained at 89.0% of initial decolorization rate after five batch reactions. The presence of NO3- accelerated the decolorization of methyl orange solution by CdS/TiO2/CSC, while SO42- and Cl- had an inhibitory effect on the decolorization of methyl orange. Therefore, present experimental results indicated to assess the applicability of CdS/TiO2/CSC as a suitable and promising photocatalyst for effective decolorization treatment of dye-containing effluents.
作者关键词：Adsorption, Photocatalysis, Azo dye, CdS, TiO2
扩展关键词：VISIBLE-LIGHT IRRADIATION; AZO-DYE; NANOCOMPOSITE FILMS; AQUEOUS-SOLUTION; DEGRADATION; DECOLORIZATION; WATER; TIO2; UV; KINETICS
通讯作者地址：Xiao, Ling; Luojia Mt Wuchang, Wuhan 430072, Hubei Province, Peoples R China
[Zhu, Huayue; Xiao, Ling; Liu, Li; Cao, Chunhua] Wuhan Univ, Key Lab Biomass Resource Chem & Environm Biotechn, Colledge Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.
[Zhu, Huayue; Jiang, Ru] Taizhou Univ, Lab Resource Utilizat & Pollut Control, Coll Life Sci, Taizhou 318000, Zhejiang, Peoples R China.
[Zeng, Guangming] HunanUniv, Minist Educ, Key Lab *Environm* Biol & Pollut Control,Changsha410082,Hunan, Peoples RChina.
研究方向：Chemistry; Materials Science; Physics
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