钇掺杂亚稳相γ-Bi_2O_3的合成及光催化性能  

Synthetization and photocatalysis property of metastable phase γ-Bi_2O_3 doped by yttrium

作　　者：李洪全 郑树凯[1] 丁帮福 闫小兵[1] LI Hongquan;ZHENG Shukai;DING Bangfu;YAN Xiaobing(College of Electronic Information Engineering,Hebei University, Baoding 071002, China)

机构地区：[1]河北大学电子信息工程学院,河北保定071002

出　　处：《中国粉体技术》2018年第6期19-24,共6页China Powder Science and Technology

基　　金：国家自然科学基金项目;编号:61674050;河北省高等学校科学技术研究项目;编号:ZD2017008;河北大学高层次人才基金项目;编号:8012605

摘　　要：在不同温度下,以氢氧化钠作为沉淀剂,采用共沉淀法合成纯的以及不同浓度钇掺杂亚稳相γ-Bi_2O_3。X射线衍射结构表征显示,温度越高,制备纯相γ-Bi_2O_3反应时间越短,而钇引入并未改变样品的晶体结构。扫描电子显微镜对样品进行微观形貌表征,发现所有颗粒样品呈现四面体形状,且钇掺杂增加颗粒聚集度。随着掺杂浓度增加,附着在四面体表面上的小颗粒尺寸逐渐增大。紫外可见漫反射光谱分析表明,钇掺杂引起禁带宽度变窄。选择罗丹明B为典型污染物以及γ-Bi_2-xYxO_3为催化剂,光催化降解性能随掺杂而提高。Precipitation method was used to synthesize pure phaseγ-Bi2O3and different concentration yttrium doping samples with NaOH as precipitant at different temperatures.X-ray diffraction characterization of the samples shows that the required reaction time shortened along with temperature increase and crystal structure of all samples are unchanged by introducing yttrium into lattice.The microstmcture of the sample is characterized by scanning electron microscopy.It is found that all samples exhibite tetrahedral particles and yttrium doping increases particle aggregation degree.The sizes of small particles attached to tetrahedral surface become larger gradually with increment of doping concentration.Ultraviolet visible diffuse reflectance spectroscopy analysis indicates the forbidden band width narrowed due to yttrium doping.Selecting Rhodamine B as model pollutant andγ-Bi2-xYxO3as photocatalyst,the degradation performance is enhanced with doping.

关 键 词：γ-Bi2O3 Y掺杂 光催化降解 

分 类 号：O643[理学—物理化学]