岩石矿物学杂志2017，Vol.36Issue(6)：825-832,8.
纳米赤铁矿电极光电催化特性及苯酚降解活性研究
Photoelectrochemical performance of nano-hematite electrode and photoelectrocatalytic activity toward oxidation of phenol
摘要
Abstract
As the problem of environmental pollution has become increasingly aggravated,the conversion of solar energy catalyzed by semiconductor material has caused much concern in the field of catalytic and environmental protection.Nano-hematite electrodes with different deposition time were synthesized by electrochemical method more quickly and effectively in this paper.X-ray Diffraction (XRD) and Raman spectroscopy confirmed that the electrode had single phase of hematite.Morphology information was obtained by Atomic Force Microscope (AFM).The nano-hematite had a particle size of 52.1 (+ 1.48) nm × 50.5(+ 1.49) nm,and the surface height was concentrated in the range of 70～100 nm,which was consistent with the normal distribution law.Moreover,the UV-Vis Diffuse Reflectance spectra illustrated the significant absorption of visible light from 350 nm to 600 nm,and the calculating result of band gap was about 2.0～ 2.1 eV.In photoelectrochemical experiments,the photocurrent density-time curve and I-V curves indicated that the electrode had great photoelectrocatalysis activity and the reaction process accorded with the Langmuir-Hinshelwood kinetics model.Furthermore,10-minute-deposited hematite electrode was used to investigate the activity of photoelectrocatalytic degradation of phenol.The results showed that degradation rate of phenol reached 62 ％ after 6 h under a constant potential of 0.65 V versus SCE (Saturated Calomel Electrode) and the constant of reaction rate k was 0.16 h-1 (R2 =0.996) when the first-order kinetics reaction model was fitted.It is thus shown that the electrochemically deposited nano-hematite possesses satisfying conductive properties and the capability of degrading phenol and other organic pollutions.关键词
赤铁矿/光电催化/光电流/苯酚Key words
hematite/photoelectrocatalysis/photocurrent/phenol分类
天文与地球科学引用本文复制引用
任桂平,孙曼仪,鲁安怀,李艳,丁竑瑞..纳米赤铁矿电极光电催化特性及苯酚降解活性研究[J].岩石矿物学杂志,2017,36(6):825-832,8.基金项目
国家重点基础研究发展计划“973”计划(2014CB846001) （2014CB846001）
国家自然科学基金(41230103,41522201,41402032) （41230103,41522201,41402032）
The Subject of National"973"Project (2014CB846001) （2014CB846001）
National Natural Science Foundation of China (41230103,41522201,41402032) （41230103,41522201,41402032）
