Liquid Phase Deposition of α-Fe2O3/ZnO Heterojunction Film with Enhanced Visible-Light Photoelectrocatalytic Activity for Pollutant Removal

被引：19

作者：

Cheng, Ling ^{[1
]}

Liu, Lan ^{[1
]}

Li, Ruizhen ^{[2
]}

Zhang, Jingdong ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Key Lab Mat Chem Energy Convers & Storage, Minist Educ, Wuhan 430074, Hubei, Peoples R China

[2] Sichuan Univ Sci & Engn, Sch Chem & Environm Engn, Zigong 643000, Sichuan, Peoples R China

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2017年 / 164卷 / 12期

基金：

中国国家自然科学基金;

关键词：

PHOTOCATALYTIC ACTIVITY; HYBRID PHOTOCATALYST; HOLLOW MICROSPHERES; NANOTUBE ARRAYS; MODIFIED ZNO; THIN-FILMS; DOPED ZNO; DEGRADATION; FABRICATION; PERFORMANCE;

D O I：

10.1149/2.0241712jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We developed liquid phase deposition (LPD) technique to prepare alpha-Fe2O3/ZnO heterojunction film for efficient removal of pollutants by visible-light-driven photoelectrocatalysis (PEC). The deposition of alpha-Fe2O3 on ZnO film was confirmed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The UV-visible diffuse reflectance spectra (DRS) indicated that the formation of alpha-Fe2O3 on the surface of ZnO film led to redshift of the absorption edge. Meanwhile, the photoluminescence (PL) spectra revealed that the recombination of photogenerated electrons and holes on alpha-Fe2O3/ZnO film was remarkably inhibited. As a result, the alpha-Fe2O3/ZnO film exhibited higher visible-light PEC activity than single alpha-Fe2O3 or ZnO film. Using the visible-light-activated alpha-Fe2O3/ZnO film with optimized alpha-Fe2O3, we studied the effective PEC degradation of diclofenac (DCF) and 4-chlorophenol (4-CP), which represented the emerging and persistent organic pollutants, respectively. Moreover, the alpha-Fe2O3/ZnO film was successfully applied to simultaneous removal of 4-CP and Cu2+ in wastewater by visible-light PEC process, demonstrating the wide applicability of the LPD alpha-Fe2O3/ZnO heterojunction film for pollutant removal. (C) 2017 The Electrochemical Society. All rights reserved.

引用

页码：II726 / II733

页数：8

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