[1]陈亦琳,陈林峰.Ag2O光催化过程中单质Ag的生成及作用机理[J].华侨大学学报(自然科学版),2011,32(6):652-656.[doi:10.11830/ISSN.1000-5013.2011.06.0652]
　CHEN Yi-lin,CHEN Lin-feng.Study on Effect and Mechanism of Metallic Ag in the Photocatalytic Process by Ag2O[J].Journal of Huaqiao University(Natural Science),2011,32(6):652-656.[doi:10.11830/ISSN.1000-5013.2011.06.0652]
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Ag2O光催化过程中单质Ag的生成及作用机理()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第32卷
期数:
2011年第6期
页码:
652-656
栏目:
出版日期:
2011-11-20

文章信息/Info

Title:
Study on Effect and Mechanism of Metallic Ag in the Photocatalytic Process by Ag2O
文章编号:
1000-5013(2011)06-0652-05
作者:
陈亦琳; 陈林峰
华侨大学材料科学与工程学院
Author(s):
CHEN Yi-lin;  CHEN Lin-feng
College of Material Science and Engineering, Huaqiao University, Quanzhou 362021, China
关键词:
Ag2O;  Ag;  可见光;  光催化;  水热法
Keywords:
Ag2O;  Ag;  visible light;  photocatalysis;  hydrothermal method
分类号:
O643.36
DOI:
10.11830/ISSN.1000-5013.2011.06.0652
文献标志码:
A
摘要:
采用水热法制备Ag2O光催化剂.利用X射线粉末衍射、扫描电镜、紫外-可见漫反射光谱、表面光电压谱对样品的晶型、形貌、光吸收及光伏响应特性进行表征,并以亚甲基兰(MB)为模型污染物,考察Ag2O在可见光(λ>420nm)照射下的催化氧化行为.结果表明:Ag2O样品由粒径为2~5μm的Ag2O颗粒组成,能带带隙1.35eV,有显著的可见光光伏响应特征; 光催化反应30min后,Ag2O颗粒表面均匀附着直径0.1~0.5μm的Ag颗粒.重复性实验说明,光催化反应过程中,单质Ag的原位生成是Ag2O保持良好活性和稳定性的主要原因.
Abstract:
Silver oxide photocatalyst,Ag2O,was synthesized by a hydrothermal method in this work.The as-prepared product was characterized by X-ray powder diffraction(XRD),scanning electron microscopy(SEM),UV-Vis diffuse reflectance spectra(DRS) and surface photovoltage spectroscopy(SPS).The results indicated the microzyme-like Ag2O with optical bandgap of 1.35 eV is comprised of particles with diameters of 2~5 μm.The photocatalytic activity was investigated by decomposing methylene blue(MB) under visible light irradiation.Metallic Ag particles with diameters of 0.1~0.5 μm were deposited on Ag2O after 0.5 h irradiation.The repetitive tests showed that the high efficient and stable performance of Ag2O are chiefly attributed to the generation of metallic Ag in the photocatalytic process.

参考文献/References:

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备注/Memo

备注/Memo:
国家自然科学基金资助项目(21003055); 华侨大学高层次人才科研启动项目(06BS213)
更新日期/Last Update: 2014-03-23