标題：Magnetically separable Cu2O/chitosan-Fe3O4 nanocomposites: Preparation, characterization and visible-light photocatalytic performance作者：Cao, Chunhua; Xiao, Ling; Chen, Chunhua; Cao, Qihua

來源出版物：APPLIED SURFACE SCIENCE 卷：333 頁：110-118 DOI：10.1016/j.apsusc.2015.02.002 出版年：APR 1 2015

摘要：A novel magnetically-separable visible-light-induced photocatalyst, Cu2O/chitosan-Fe3O4 nanocomposite (Cu2O/CS-Fe3O4 NC), was prepared via a facile one-step precipitation-reduction process by using magnetic chitosan chelating copper ions as precursor. The structure and properties of Cu2O/CS-Fe3O4 NCs were characterized by XRD, FT-IR, SEM, HRTEM, SAED, EDS, BET, VSM, XPS and UV-vis/DRS. The photocatalytic activity of Cu2O/CS-Fe3O4 NCs was evaluated by decolorization of reactive brilliant red X-3B (X-3B) under visible light irradiation. The characterization results indicated that Cu2O/CS-Fe3O4 NCs exhibited relatively large specific surface areas and special dimodal pore structure because Cu2O was wrapped in chitosan matrix embedded with Fe3O4 nanoparticles. The tight combination of magnetic Fe3O4 and semiconductor Cu2O through chitosan made the nanocomposites show good superparamagnetism and photocatalytic activity. It was found that X-3B could be decolorized more efficiently in acidic media than in neutral or alkaline media. The decolorization of X-3B was ascribed to the synergistic effect of photocatalysis and adsorption. Cu2O/CS-Fe3O4 NCs could be easily separated from the solution by an external magnet, and the decolorization rates of X-3B were still above 87% after five reaction cycles, indicating that Cu2O/CS-Fe3O4 NCs had excellent reusability and stability.

入藏号：WOS:000350857900015

文獻類型：Article

語種：English

作者關鍵詞：Cuprous oxide, Chitosan, Magnetic separation, Photocatalytic performance, Visible light

擴展關鍵詞：NANOPARTICLES; CU2O; DEGRADATION; ADSORPTION; IRRADIATION; FABRICATION; REMOVAL; PHOTODEGRADATION; DECOLORIZATION; MICROSPHERES

通訊作者地址：Xiao, Ling; Luojia Mt Wuchang, Wuhan 430072, Hubei, Peoples R China.

電子郵件地址：xiaoling911@whu.edu.cn

地址：

[Cao, Chunhua; Xiao, Ling; Cao, Qihua] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Cao, Chunhua; Chen, Chunhua] Jianghan Univ, Coll Chem & Environm Engn, Minist Educ, Lab Optoelect Chem Mat & Devices, Wuhan 430056, Peoples R China.

研究方向：Chemistry; Materials Science; Physics

ISSN：0169-4332

eISSN:1873-5584