氯氧化铁的制备及可见光催化性能  

Preparation of Chloride Ferric Oxide with Enhanced Visible Light Photocatalytic Performance

作　　者：刘梦洋 邓德明[1] LIU Mengyang;DENG Deming(School of Resource and Environmental Seiences,Wuhan University,Wuhan 430072,Hubei,China)

机构地区：[1]武汉大学资源与环境科学学院

出　　处：《武汉大学学报（理学版）》2018年第4期331-336,共6页Journal of Wuhan University:Natural Science Edition

基　　金：武汉市科技攻关计划(201260723227)资助项目

摘　　要：以氯化铁和氧化铁为原料,采用化学气相迁移法在密封条件下制备氯氧化铁（FeOCl）催化剂,通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射光谱（XRD）、X光电子能谱（XPS）等分析手段对催化剂进行表征,研究了罗丹明B（RhB）初始浓度、H2O2添加量、催化剂用量、初始pH值等对RhB脱色率的影响.结果表明：在催化剂用量为0.5g·L^-1、RhB初始浓度为100mg·L^-1、H2O2浓度为20mmol·L^-1、初始pH值为4.5时,可见光下经过15min的催化反应,RhB脱色率达到99%以上;初始pH值为7.0时,经过40min,RhB的脱色率也可达到95.5%;添加一定量的H2O2,能够促进羟基自由基（·OH）生成,提高脱色效率;催化剂稳定性良好,3次重复催化实验后,RhB的脱色率无明显降低.The heterogeneous catalyst chloride ferric oxide（FeOCl）was prepared by chemical vapor transition method using ferric chloride（FeCl3）and iron oxide（Fe2 O3）as the precursors under sealed condition,and characterized by SEM,TEM,XRD and XPS techniques.The effect of rhodamine B（RhB）initial concentration,H2 O2 concentration,catalyst dosage and initial pH on decolorization rate of RhB were explored.The results show that：under the conditions of catalyst dosage 0.5 g·L^-1,RhB initial concentration 100 mg·L^-1,H2 O2 concentration 20 mmol·L^-1,initial pH 4.5,and after 15 minutes of visible photocatalytic reaction,the decolorization rate of RhB reaches above99%.Under the condition of initial pH 7.0,after 40 minutes of reaction,the decolorization rate of RhB reaches95.5%.Adding a certain amount of hydrogen peroxide can promote the formation of hydroxyl radical（·OH）and improve the decolorization rate.And the catalyst shows good stability after three cycles.

关 键 词：氯氧化铁 罗丹明B 脱色率 羟基自由基 

分 类 号：O643[理学—物理化学]