ZnO/Bi_2O_3复合物的制备及光催化性  

Preparation and photocatalytic performance of ZnO-Bi_2O_3 composite

作　　者：张鹏飞[1] 姚俊雄 邓洪权[1] 蒋琪英[1,2] 胡亚敏[1] 

机构地区：[1]西南科技大学材料学院化学系,四川绵阳621010 [2]西南科技大学教育部生物质材料工程中心,四川绵阳621010

出　　处：《工业水处理》2015年第5期79-82,共4页Industrial Water Treatment

基　　金：西南科技大学实验室开放基金(13xnkf04);西南科技大学大学生创新基金(CX13-028)

摘　　要：通过分子前驱体Zn[Biedta]2·8H2O热分解得到Zn-Bi-O三元复合氧化物,采用XRD、漫反射光谱、FTIR等方法探索灼烧时间对复合氧化物的结构和性质的影响。同时以甲基橙的光降解为模型研究了灼烧时间对复合物催化性能的影响。结果表明,灼烧时间对复合物物相、吸光度、催化效果等均存在影响。制备的复合物对甲基橙光降解均具有不同程度的催化能力,其中灼烧2 h所得复合物的催化效果最好,在中性环境中,对20 mg/L的甲基橙而言添加量2 g/L为最佳,光照3 h的褪色率达90%。ZnO-Bi2O3 ternary composite oxide has been prepared through thermal decomposition of molecular prec- ursor Zn [Biedta]2·8H2O （edta =ethylenediaminetetraacetate）. The effects of ignition time explored by X-ray po- wder diffraction, FT-IR spectra and UV-Vis diffuse reflectance spectroscopy on the structure and characteristics of the composite oxide are discussed. Taking the photo-degradation of methyl orange （MO） as the model,the effects of ignition time on the catalytic performance of composite are studied. The results show that ignition time has effects on the phase, absorbency, catalytic effectiveness, etc. of ZnO-Bi2O3 composite. The prepared composite has catalytic capacity for MO photo-degradation to different degrees. The catalytic effect of the prepared composite is the best when the ignition time is two hours. In neutral environment, as far as 20 mg/L of methyl orange is concerned,the optimum amount of photocatalyst is 2 g/L and the decoloration rate can reach 90% under a 3-hour irradiaton.

关 键 词：复合氧化物 锌 铋 光催化性 甲基橙 

分 类 号：X703.1[环境科学与工程—环境工程]