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花球状BiOCl薄膜的低温制备及其光催化性能
引用本文:刘晓霞,樊彩梅,王韵芳,王雅文,张小超,梁镇海.花球状BiOCl薄膜的低温制备及其光催化性能[J].中国科学:化学,2012(8):1145-1151.
作者姓名:刘晓霞  樊彩梅  王韵芳  王雅文  张小超  梁镇海
作者单位:太原理工大学化学化工学院,太原030024
基金项目:本工作得到国家自然科学基金(20876104,21176168);山西省科技攻关基金(20090311082)的资助,特此致谢.
摘    要:以BiCl3为原料,采用醇解.涂覆法在相对较低的温度下制备了具有花球状微观形貌的BiOCl薄膜.采用X射线衍射谱(XRD)、扫描电子显微镜(SEM)、电子能量散射谱(EDS)和紫外-可见漫反射光谱(DRS)对所制薄膜进行了晶相、形貌、元素组成和光学性质表征,并以甲基橙为目标降解物,研究了薄膜的光催化性能.分析结果表明:BiOCl薄膜具有四方晶相结构,薄膜呈花球状微观形貌,对紫外光有良好的吸收.降解实验结果表明:未经过高温焙烧的BiOCl薄膜具有较佳光催化活性,经紫外光照射150min后对甲基橙的降解率达97%,且具有较高的光催化稳定性,重复使用4次后对甲基橙的降解率仍保持94%以上.此外,文中还对BiOCl薄膜的形成机理做了推测.

关 键 词:花球状BiOCl薄膜  低温制备  光催化

Low temperature preparation of flower-like BiOCl film and its photocatalytic activity
LIU XiaoXia,FAN CaiMei,WANG YunFang,WANG YaWen,ZHANG XiaoChao,LIANG ZhenHai.Low temperature preparation of flower-like BiOCl film and its photocatalytic activity[J].Scientia Sinica Chimica,2012(8):1145-1151.
Authors:LIU XiaoXia  FAN CaiMei  WANG YunFang  WANG YaWen  ZHANG XiaoChao  LIANG ZhenHai
Institution:College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Abstract:Flower-like BiOC1 film was prepared in a low temperature by the alcoholysis and coating method using BiC13 as precursor. The obtained film were characterized by XRD, SEM, EDS and DRS and the results showed that the obtained film was composed of tetragonal phase BiOC1 with flower-like structure and had a good absorption of ultraviolet. The photoeatalytic activity of BiOC1 film was evaluated by the degradation of methyl orange under UV light irradiation. The results showed that the film prepared in low temperature had the best photocatalytie activity. About 97% methyl orange can be degraded after 150 min UV light irradiation. After reused four times, the photodegradation rate for BLOC1 film maintained about 94%, which indicated the BiOC1 film have a long photocatalytic lifetime and stable. In addition, a possible fabrication mechanism of BLOC1 flower-like film was also inferred and the results suggested that the ethylene glycol solvent may favor the formation of the flower-like structure.
Keywords:flower-like BiOC1 film  low-temperature preparation  photocatalysis
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