多形貌γ-Bi_2MoO_6的可控制备及其可见光催化活性  

Controlled Synthesis and Visible Light Catalytic Activity of Multi-Shaped γ-Bi_2MoO_6 Microcrystals

作　　者：李晶晶[1] 张军[1] 杜西刚[1] 白孝康 杜德光 

机构地区：[1]河南科技大学化工与制药学院,河南洛阳471023 [2]河南惠尔纳米科技有限公司,河南洛阳471003

出　　处：《河南科技大学学报（自然科学版）》2015年第2期100-104,8,共5页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(21076063);河南省科技攻关基金项目(102102210170);洛阳市科技攻关基金项目(1101030A);洛阳市矿产资源化工重点实验室建设项目(1003016A)

摘　　要：采用表面活性剂辅助水热法合成了系列γ-Bi2 MoO6微纳米晶粉。考察了 pH 值及不同表面活性剂对产物物相及形貌的影响。以可见光降解罗丹明 B 作为探针反应，研究了不同条件下的降解效果，对γ-Bi2 MoO6的催化活性做出了评价。研究结果表明：在反应物 Bi 与 Mo 物质的量比为2∶1及 pH 为3～9时，表面活性剂的加入并不影响正交晶系γ-Bi2 MoO6的形成；pH 值为9时所得产物的催化活性最高，可见光照射3 h 的降解率可达79．62％。十二烷基硫酸钠（SDS）辅助所得纳米片状γ-Bi2 MoO6具有高达98．81％的降解率。A series of γ-Bi2MoO6 microcrystals were synthesized by using surfactant assisted hydrothermal route. The change of phase and composition of as-prepared products by the impact of varied solution p H values and different surfactants were investigated. The visible light catalytic activities of the γ-Bi2MoO6 powders were evaluated by means of the catalytic degradation of Rhodamine B aqueous solution. The degradation effects under different reaction conditions were determined in detail. The results show that when the reactant mole ratio of Bi to Mo is set at 2∶ 1 and the p H value of reaction solution is kept in the range from 3 to 9,the resulting products is pure orthorhombic γ-Bi2MoO6 whether the surfactants are added or not. When the p H value is 9,the as-obtained γ-Bi2MoO6 samples exhibit higher catalytic activity,and the degradation rate can reachs 79. 62% within 3 h visible-light irradiation. The sample obtained with assistance of SDS shows best photocatalytic activity and the degradation rate is 98. 81%.

关 键 词：水热法 γ-Bi2MoO6 光催化 降解 

分 类 号：TQ426.91[化学工程]