BiOX基复合材料的制备及光催化性能研究  

Preparation and photocatalytic properties of BiOX matrix composites

作　　者：朱曲平[1,2] 刘香香 王姝 袁兰 刘成兵 ZHU Quping;LIU Xiangxiang;WANG Shu;YUAN Lan;LI Chengbing(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;School of Civil Engineering and Architecture,Chongqing Institute of Engineering,Chongqing 400056,China)

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]重庆工程学院建筑工程学院,重庆400056

出　　处：《功能材料》2024年第6期6212-6217,共6页Journal of Functional Materials

基　　金：重庆市教委科学技术研究重大项目(KJZD-M202301903);重庆市教委科学技术研究项目(KJQN202201908)。

摘　　要：BiOI作为BiOX材料中的一种,具有带隙窄、对可见光吸收强的优点。以TiO_(2)为原料,采用溶剂热法制备了TiO_(2)-BiOI复合材料,通过XRD、SEM、TEM、UV-Vis、PL及光催化降解等手段对复合材料进行了表征,探究了TiO_(2)不同复合比对复合材料结构和光催化性能的影响。结果表明,球状颗粒的TiO_(2)分布在BiOI的片层之间,二者复合后提高了复合材料在可见光区域的光响应能力,减小了带隙宽度。发射光谱表明,TiO_(2)-BiOI复合材料在467 nm处出现了本征发射峰,发射峰强度随TiO_(2)质量分数的增加先降低后轻微增大,TiO_(2)-BiOI-30%的PL强度最低。以甲基橙溶液模拟降解废水,TiO_(2)-BiOI复合材料对甲基橙的光催化降解率随TiO_(2)质量分数的增大表现出先增大后降低的趋势,TiO_(2)-BiOI-30%在180 min时对甲基橙的降解率最高为99.57%,较纯BiOI提高了100.62%,重复使用5次后降解率依旧高达97.02%,具有优异的重复使用性能。As one of the BiOX materials,BiOI has the advantages of narrow band gap and strong absorption of visible light.In this paper,TiO_(2)-BIOI composites were prepared by solvothermal method using TiO_(2) as raw materials,and the effects of different TiO_(2) composites on the structure and photocatalytic performance of the materials were investigated by XRD,SEM,TEM,UV-vis,PL and photocatalytic degradation.The results showed that TiO_(2) with spherical particles was distributed between the layers of BiOI,whose combination improved the light response ability of the composite material in the visible light region and reduced the bandgap width.The emission spectra showed that TiO_(2)-BiOI had an intrinsic emission peak at 467 nm,and the emission peak intensity decreased first and then increased slightly with the increase of TiO_(2) mass fraction,and the PL intensity of TiO_(2)-BioI-30%was the lowest.Using methyl orange solution to simulate the degradation wastewater,the photocatalytic degradation rate of methyl orange by TiO_(2)-BiOI composites increased first and then decreased with the increase of TiO_(2) composite mass fraction.At 180 min,the degradation rate of methyl orange by TiO_(2)-BioI-30%was up to 99.57%,which was 100.62%higher than that by pure BiOI.After repeated use for 5 times,the degradation rate is still as high as 97.02%,which has excellent reuse performance.

关 键 词：BiOX材料 TiO_(2)-BiOI复合材料 光谱性能 光催化性能 重复使用性能 

分 类 号：O613.6[理学—无机化学]