BiOCl_(x)I_(1-x)纳米花固溶体光催化剂制备及室内空气环境净化研究  

Preparation of BiOCl_(x)I_(1-x) Nanoflowers Solid Solution Photocatalyst and Study on Indoor Air Environment Purification

作　　者：闫刚 杜晓军 YAN Gang;DU Xiaojun(Jilin Jianzhu University,Changchun Jilin 130118,China)

机构地区：[1]吉林建筑大学,吉林长春130118

出　　处：《北方建筑》2023年第2期45-49,共5页Northern Architecture

基　　金：吉林省科技厅自然科学基金(20210101138JC);吉林省教育厅科研项目(JJKH20220264KJ)。

摘　　要：本研究利用具有高光生电子空穴对分离效率的BiOCl和具有优异可见光吸收特性的BiOI,采用水热法制备BiOCl_(x)I_(1-x)固溶体催化剂,通过调节卤素之间的相对含量来可控调节半导体催化剂的能带结构和光催化性能。利用SEM,XRD等技术对催化剂的晶相、形貌等进行表征,并以甲醛为目标降解物,评价其可见光催化活性。光催化降解甲醛性能研究表明,在可见光照射下,BiOCl_(0.6)I_(0.4)固溶体催化剂在60 min内对甲醛溶液的降解明显高于单体BiOCl和Bi OI,同时在模拟室内真实环境条件下同样可实现甲醛溶液的高效降解。进一步对其光催化降解机理研究发现,Bi OCl_(x)I_(1-x)固溶体催化剂光降解甲醛过程中h+直接氧化甲醛分子起主导作用,也存在一定的·OH对甲醛的氧化作用。In this study,BiOCl_(x)I_(1-x) solid solution catalyst was prepared by hydrothermal method using photoinduced electron hole pair BiOCl with high separation efficiency and BiOI with excellent visible light absorption characteristics.The energy band structure and photocatalytic performance of semiconductor catalyst were controlled by adjusting halogen content.The crystal phase and morphology of the catalyst were characterized by SEM,XRD and other techniques,and its visible light catalytic activity was evaluated with formaldehyde as the target degradation product.The study of photocatalytic degradation of formaldehyde showed that under visible light irradiation,the degradation of formaldehyde solution by BiOCl_(0.6)I_(0.4) solid solution catalyst was significantly higher than that of monomer BiOCl and BiOI in 60 minutes,and the efficient degradation of formaldehyde solution could also be achieved under simulated indoor real environmental conditions.Further research on its photocatalytic degradation mechanism found that the direct oxidation of formaldehyde molecules by h+played a leading role in the process of photocatalytic degradation of formaldehyde by BiOCl_(x)I_(1-x) solid solution catalyst,and there was also a certain oxidation of formaldehyde by·OH.

关 键 词：卤氧化铋 固溶体 甲醛 光催化 

分 类 号：TQ426[化学工程]