二氧化铈/钼酸铋复合光催化剂的制备及光催化性能
Preparation and Photocatalytic Activity of Cerium Oxide/Bismuth Molybdate Composite Photocatalyst
作者单位E-mail
胡丰献 江苏大学化学化工学院, 镇江 212013
盐城工学院化学化工学院, 盐城 224051 
 
戴勇 盐城工学院化学化工学院, 盐城 224051 123daiyong123@163.com 
郁桂云 盐城工学院化学化工学院, 盐城 224051 yuguiyun1@163.com 
摘要: 采用水热法一步合成二氧化铈/钼酸铋复合材料,进一步探究了不同酸碱性反应体系溶液中二氧化铈与钼酸铋的组成、结构和光催化性能的关系。运用X射线衍射分析仪、扫描电子显微镜、傅里叶变换红外光谱仪、紫外-可见漫反射光谱仪等对样品进行表征。研究发现CeO2的加入与钼酸铋在不同酸碱性合成体系合成产物的形态、组成、结构及光催化性能息息相关。未加Ce3+前,在酸性条件下反应生成的是Bi2MoO6;在碱性条件下的反应产物是Bi3.64Mo0.36O6.55/Bi2MoO6复合材料。当合成的反应溶液体系中引入CeO2之后,在酸性条件下反应生成的Bi2MoO6催化性能最好;在碱性条件下,反应生成的是Bi3.64Mo0.36O6.55。因此,在碱性条件下,CeO2的加入能够促进Bi2MoO6转化Bi3.64Mo0.36O6.55
关键词: 二氧化铈  钼酸铋  水热法  光催化  罗丹明B
基金项目: 国家自然科学青年基金(No.21603182)和江苏高校自然科学基金(No.2016097)资助
Abstract: Cerium oxide/Bismuth molybdate catalysts were synthesized by hydrothermal method. The relationships between cerium oxide and the composition, structure, photocatalytic activity of Bismuth molybdate were further investigated under the different acid-base reaction system solutions. The samples were characterized by X-ray diffraction, scanning electron microscope, Fourier transform infrared spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy. It was found that the addition of CeO2 seriously affected the morphology, composition, structure and photocatalytic properties of bismuth molybdate in different acid-base synthesis systems. The reaction product was more beneficial to the formation of Bi2MoO6 in the acidic system and made for the formation of Bi3.64Mo0.36O6.55/Bi2MoO6 in alkaline condition without CeO2. When CeO2 was added to reaction-solution system, the composition and structure of the substances were almost unchanged in the acidic system; the photocatalytic activity was greatly enhanced. The morphology, composition, structure and photocatalytic properties of the materials have changed greatly under alkaline conditions. The reaction product was more beneficial to the formation of Bi3.64Mo0.36O6.55. Therefore, under alkaline conditions, the addition of CeO2 promoted the conversion of Bi2MoO6 to Bi3.64Mo0.36O6.55.
Keywords: cerium oxide  bismuth molybdate  hydrothermal method  photocataly  rhodamine B
投稿时间:2018-09-29 修订日期:2018-12-27
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胡丰献,戴勇,郁桂云.二氧化铈/钼酸铋复合光催化剂的制备及光催化性能[J].无机化学学报,2019,35(3):433-441.
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