Bi_(2)O_(3)/g-C_(3)N_(4)-Nd复合光催化剂的制备及其光催化性能研究  

Preparation of Bi_(2)O_(3)/g-C_(3)N_(4)-Nd composite photocatalyst and study on its photocatalytic performance

作　　者：任富彦 REN Fu-yan(Xinjiang College of Science&Technology,Korla 841000,China;School of Infrastructure Engineering,Nanchang University y,Nanchang 330031,China)

机构地区：[1]新疆科技学院,新疆库尔勒841000 [2]南昌大学工程建设学院,江西南昌330031

出　　处：《现代化工》2025年第3期160-165,171,共7页Modern Chemical Industry

基　　金：新疆科技学院校级科研基金项目(2024-KYPT12)。

摘　　要：通过半导体复合法和元素掺杂法制备了Bi_(2)O_(3)/g-C_(3)N_(4)-Nd复合光催化剂,然后利用SEM、XRD、FT-IR、UV-Vis DRS和XPS对复合物进行了表征。结果表明,在盐酸四环素(TCH)光降解实验中,Nd元素掺杂量为1.5%时,Bi_(2)O_(3)/g-C_(3)N_(4)-Nd-1.5效率最高,其光催化性能的光反应速率大约是Bi_(2)O_(3)的2.91倍、g-C_(3)N_(4)的2.52倍、g-C_(3)N_(4)-Nd的1.69倍、Bi_(2)O_(3)/g-C_(3)N_(4)的1.72倍。其光催化活性的显著增强主要归功于Nd_(2)O_(3)晶格中氧的快速扩散增强了·O^(-)_(2)的作用。此外,Bi_(2)O_(3)/g-C_(3)N_(4)-Nd-1.5在使用3次以后,对TCH的光降解效率只降低了4.9%,表明具有较高的回收再利用性能。最后,通过捕获实验验证了光催化降解TCH的主要活性物种为超氧自由基·OH和·O^(-)_(2)。Bi_(2)O_(3)/g-C_(3)N_(4)-Nd composite photocatalysts are prepared through the semiconductor composite method and the element doping technique,and characterized by means of SEM,XRD,FT-IR,UV-Vis DRS,and XPS.In the photodegradation experiment of tetracycline hydrochloride,it is found that Bi_(2)O_(3)/g-C_(3)N_(4)-Nd-1.5 composite photocatalyst,which has a Nd doping amount of 1.5%,exhibits the highest efficiency,its photoreaction rate is approximately 2.91 times that of Bi_(2)O_(3),2.52 times that of g-C_(3)N_(4),1.69 times that of g-C_(3)N_(4)-Nd,and 1.72 times that of Bi_(2)O_(3)/g-C_(3)N_(4).The significant enhancement in photocatalytic activity is primarily attributed to the rapid diffusion rate of oxygen in the Nd2O3 lattice,which enhances the action of superoxide radicals(·).Additionally,after three cycles of use,the photodegradation efficiency of Bi_(2)O_(3)/g-C_(3)N_(4)-Nd-1.5 to tetracycline hydrochloride decreases by 4.9%only,indicating high recyclability and reusability.Finally,it is verified through capture experiment that the main active species responsible for the photocatalytic degradation of tetracycline hydrochloride are hydroxyl radicals(·OH)and superoxide radicals(·).

关 键 词：光催化 g-C_(3)N_(4) Bi_(2)O_(3) 盐酸四环素 半导体材料 

分 类 号：X703[环境科学与工程—环境工程]