Photoelectrochemical performance of birnessite films and photoelectrocatalytic activity toward oxida

来源 :环境科学学报(英文版) | 被引量 : 0次 | 上传用户:a522920779a
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Bessite films on fluorine-doped tin oxide (FTO) coated glass were prepared by cathodic reduction of aqueous KMnO4.The deposited bessite films were characterized with X-ray diffraction,Raman spectroscopy,scanning electron microscopy and atomic force microscopy.The photoelectrochemical activity of bessite films was investigated and a remarkable photocurrent in response to visible light was observed in the presence of phenol,resulting from localized manganese d-d transitions.Based on this result,the photoelectrocatalytic oxidation of phenol was investigated.Compared with phenol degradation by the electrochemical oxidation process or photocatalysis separately,a synergetic photoelectrocatalytic degradation effect was observed in the presence of the bessite film coated FTO electrode.Photoelectrocatalytic degradation ratios were influenced by film thickness and initial phenol concentrations.Phenol degradation with the thinnest bessite film and initial phenol concentration of 10 mg/L showed the highest efficiency of 91.4% after 8 hr.Meanwhile,the kinetics of phenol removal was fit well by the pseudofirst-order kinetic model.
其他文献
期刊
孙子曰:“将者,智、信、仁、勇、严也。”“智者,先见而惑,能谋虑,通权变也;信者,号令一也;仁者,患抚恻隐,得人心也;勇者,殉义不惧,能果毅也;严者,以威严肃众心,相领,缺一不
Interest in the development of inorganic polymerized coagulants is growing;however,there are only limited studies on the synthesis of polytitanium coagulants,wh
随着当前我国社会经济的持续高速化发展,相关的建筑工程施工技术与管理水平也取得了巨大的发展与进步.但随着建筑工程项目的不断增多,一些施工问题也逐渐凸显了出来.如现场环
本标准规定了术语和定义、分类、技术要求、试验方法、检验规则及标志、包装、贮存、运输。  本标准适用于带有装饰功能的承重或非承重的烧结实心砖或多孔砖。
阐述了越南造纸工业的现状,尤其是列出了2007年生产量、消费量、进出口量,市场份额等;指出了发展中存在的主要问题;并提出了解决这些问题的对策措施以及造纸工业的发展规划.
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
与刘纲先生相识己久,其时正逢其创业初期.经年了解,甚感其人平易低调;对于建筑创作,他多年亲历亲为且激情不减;观察行业、发表见解,他常常又是洞若观火;在与他的每一次交谈中
期刊
人的正常寿命是120岁,我国人口平均寿命65岁。影响寿命主要有以下两个原因:二是细菌、病毒感染引起人类死亡,占人类死亡率30%左右。随着人类年龄增加,内分泌系统分泌的活性物