Heterogeneous Photocatalytic Mineralization of Chlorobenzene by Paratungstate-loaded Titania Catalys

来源 :Chemical Research in Chinese Universities | 被引量 : 0次 | 上传用户:vay_b
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
Paratungstate-loaded titania catalysts were prepared %via% the addition of a series of aqueous solutions of paratungstate(denoted as W_ 7) into an isopropanol solution of Ti[OCH(CH_ 3)_ 2]_ 4 by means of the sol-gel method. The catalysts were characterized by EDX, BET, FTIR, UV-Vis DRS, XRD and the results indicate that such paratungstate-loaded catalysts maintained their heptatungstate structure in the anatase titania matrix up to 400 ℃. The catalysts were tested for the heterogeneous photodegradation of chlorobenzene in aqueous media and showed a better catalytic activity than P-25 TiO_ 2 because paratungstate can prevent the recombination of the holes and electrons produced during irradiation. Moreover, the paratungstate-loaded titania catalysts can resist the disaggregation during the photoirradiation and can be easily recycled from the aqueous suspensions after reactions. Paratungstate-loaded titania catalysts were prepared% via% the addition of a series of aqueous solutions of paratungstate (denoted as W_7) into an isopropanol solution of Ti [OCH (CH_3) _2] _4 by means of the sol-gel method. The catalysts were characterized by EDX, BET, FTIR, UV-Vis DRS, XRD and the results that that paratungstate-loaded catalysts maintained their heptatungstate structure in the anatase titania matrix up to 400 ° C. The catalysts were tested for the heterogeneous photodegradation of chlorobenzene in aqueous media and showed a better catalytic activity than P-25 TiO 2 because paratungstate can prevent the recombination of the holes and electrons produced during irradiation. Moreover, the paratungstate-loaded titania catalysts can resist the disaggregation during the photoirradiation and can be easily recycled from the aqueous suspensions after reactions.
其他文献
目的:建立测定洛莫司汀及胶囊含量测定和有关物质检查的HPLC方法。方法:采用AgilentC18柱(250mm×4.6mm,5μm),流动相为甲醇-水(70∶30);流速1.0mL.min-1;检测波长230nm;柱温
背景材料:3月20日,财政部部长楼继伟在“中国发展高层论坛2016”年会上表示,清理规范财政支出的挂钩事项是预算管理制度改革中非常重要的内容。现阶段挂钩事项存在几大弊端:
在中班选择“鞋”这一常见的事物设计相关活动,可以引导幼儿关注生活,丰富和积累经验。原方案将数学、科学、社会等领域融合在一个教学活动中,体现了综合教育的思想。另外,原方案在准备和实施过程中非常注重幼儿的参与、操作,值得肯定。但在有限的时间里,如何根据内容确定核心价值,实现核心目标,原方案在这方面还值得推敲。我在设计活动时特别注意了以下三点:一是关注“买鞋”过程。人们在买鞋时总是首先确定要买什么鞋,买
主要目的是探讨三个位移积的特性。众所周知 ,一般意义上的欧拉角 (Euler)和布里安特 (Briant)角通常用来描述机器人的旋转运动。然而 ,对于三个任意位移的积 :R =R1R2 R3 研
近年来,菏泽市牡丹区积极创新安全监管方式,健全工作协调机制,筑牢安全基层基础,探索出了一条依托“安全社区”创建工作促进安全生产“双基”建设和社会和谐稳定的新 In rec
近些年我国建筑业的不断发展中,暴露出来了诸多的安全管理问题,这不仅影响了建筑施工企业的经济效益,给企业造成了不必要的财产损失,同时也给社会造成了诸多的不良影响,如何
在高中化学的教学中,通过教学的生活化,可以改变传统高中化学教学的教学方式,增加课堂教学的趣味性,提升课堂的教学效果。下面,笔者将对高中化学生活化教学的有效实施策略进
就中学政治课程而言,需要创设多样化的情境,多角度引导学生深入体验,深层次感受教学内容,帮助他们逐渐养成良好的道德习惯,养成正确的人生观、价值观。在新课标背景下,作为一
介绍了氯气装置的特点 ,氯气阀门的结构设计及材料的选用。 The characteristics of chlorine plant, the design of chlorine valve and the selection of materials are i
每天深处在社交网络舆论中,人不知不觉变得戾气很重。  爱和陌生人互怼,因为一句话,一个观点的分歧,问候对方全家,追到对方微博主页去骂他。  朋友圈爱发表热门事件观点,永远觉得自己的三观是最正的。有人留言反对?互杠一轮再互删。  喜欢的人就去关注,明星、博主、素人,但如果某天对方说了不符合自己期望的话,那便取关再见。  当你喜欢A,我讨厌A,那A就是无赖,你就是白痴。  当我喜欢B,夸B时,总要踩一
期刊