片状氧化铋的软模板法制备及其光催化降解性能  

Preparation of bismuth oxide nanoplates with a soft template and their photocatalytic property

作　　者：周慧[1,2] 王磊[1] 沈明[1] 樊璐[1] 

机构地区：[1]扬州大学化学化工学院,江苏扬州225002 [2]扬州工业职业技术学院化学工程学院,江苏扬州225127

出　　处：《扬州大学学报（自然科学版）》2014年第4期30-34,共5页Journal of Yangzhou University：Natural Science Edition

基　　金：国家自然科学基金资助项目(21273194);江苏省高校优势学科建设工程资助项目

摘　　要：首先,以Bi(NO3)3为铋源、尿素为均相沉淀剂,在聚乙二醇(PEG4000)-DL-天冬氨酸复合软模板体系中,采用水热法成功制得片状前驱体纳米Bi2O2CO3,再经煅烧得到γ型片状纳米氧化铋,并通过扫描电子显微镜(SEM)、X射线衍射(XRD)、低温N2吸附-脱附(BET)和紫外-可见光谱(UV-Vis)等手段对样品进行表征与分析;然后,以制备的片状纳米氧化铋作为催化剂,研究了其对甲基紫的可见光催化降解作用.结果表明:经可见光光照6h,所制备的片状纳米氧化铋对甲基紫的脱色率可达97.10%,而紫外光照射下仅需1h即可使脱色率高达99.84%,故该催化剂具有良好的光催化活性.Utilizing PEG4000-DL-aspartic acid as the composite soft template, Bi（NO3）3 as a bis- muth source and urea as an alkali source, homogeneous precursor Bi2O2CO3 nanoplates are success- fully synthesized by a simple hydrothermal method. The γ-Bi2O3 nanoplates are obtained after calci- nation. The products are characterized by scanning electron microscopy （SEM）, X-ray powder dif- fraction （XRD）, Brunauer-Emmett-Teller （BET） N2-adsorption and UV-Vis spectra. Then the as-prepared Bie O3 nanoplates are used as catalysts to study the catalytic degradation of methyl vio- let. The results show that as prepared Bi2 O3 nanoplates have good decolorization efficiency of meth- yl violet which reaches as high as 97.10% within 6 h under visible light irradiation, and it has high- er catalytic activity under the ultraviolet radiation and the decolorization efficiency of methyl violet can reach 99.84% in 1 h.

关 键 词：片状氧化铋 聚乙二醇 DL-天冬氨酸 复合软模板 光催化 

分 类 号：O614.53[理学—无机化学] O644.14[理学—化学]