PhC_(2)Cu/SrO异质结光催化降解双氯芬酸的机制研究  

Mechanism study on photocatalytic degradation of diclofenac by PhC_(2)Cu/SrO heterojunction

作　　者：陈灵容 王奕舜 张筱昱 刘德柱 陈平[1] 吕文英[1] 刘国光[1] CHEN Lingrong;WANG Yishun;ZHANG Xiaoyu;LIU Dezhu;CHEN Ping;Lü Wenying;LIU Guoguang(Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control,Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health,School of Environmental Science and Engineering,Guangdong University of Technology,Guangzhou 510006)

机构地区：[1]广东工业大学环境科学与工程学院,广东省环境催化与健康风险控制重点实验室,粤港澳污染物暴露与健康联合实验室,广州510006

出　　处：《环境科学学报》2025年第1期123-134,共12页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.21906029,22076029,22176042);广州市科技计划项目(No.202102020774,201903010080)。

摘　　要：药品和个人护理产品(PPCPs)因其对生态系统和人类健康的潜在威胁而广受关注.本研究提出一种新型的异质结改性思路,开发了苯乙炔铜/氧化锶(PhC_(2)Cu/SrO)异质结光催化剂并用于处理含双氯芬酸(DCF)污染废水.本研究构建的PhC_(2)Cu/SrO异质结中,SrO无需被光源激发,仅利用其强大的电子转移能力,便实现了PhC_(2)Cu光生电子的高效离域,进而能更高效地活化水体中的分子氧,这是高效去除废水中DCF的关键.同时,采用SEM、TEM、XRD、XPS及UV-vis DRS等方法对复合材料的形貌结构、元素分布及光学性质进行了表征.研究结果表明,构建的PhC_(2)Cu/SrO异质结具有拓宽的光响应范围和增强的载流子分离能力,掺杂比为10%的PhC_(2)Cu/SrO展现出高效的DCF光催化降解速率(0.0207 min^(-1)),达到了PhC_(2)Cu的2.62倍,表现出较好的光催化性能.此外,体系对环境中绝大多数典型的PPCPs均表现出较好的光催化活性.结合电子自旋共振测试、自由基捕获实验证实了·O_(2)^(-)和h^(+)是该体系的主要活性物种.研究显示,PhC_(2)Cu/SrO复合材料在水处理方面的应用具有一定的潜在优势.Pharmaceuticals and personal care products(PPCPs)have received widespread attention due to their potential threats to ecosystems and human health.This study introduces a novel heterojunction modification strategy,developing a phenylacetylene copper/strontium oxide(PhC_(2)Cu/SrO)heterojunction photocatalyst for wastewater treatment.In the PhC_(2)Cu/SrO,efficient delocalization of photogenerated electrons in PhC_(2)Cu was successfully achieved by leveraging SrO’s strong electron transfer ability,significantly enhancing its ability in the activation of molecular oxygen in water.This capability is crucial for the efficient removal of DCF from wastewater.The composite materials’morphology,structure,element distribution,and optical properties were characterized using SEM,TEM,XRD,XPS,and UV-vis DRS measurements,respectively.The results indicated that the construction of PhC_(2)Cu/SrO heterojunction broadened its photoresponse range and enhanced carrier separation ability.With a doping ratio of 10%,PhC_(2)Cu/SrO exhibited a photocatalytic degradation rate of DCF at 0.0207 min^(-1),which was 2.62 times higher than that of PhC_(2)Cu,demonstrating remarkable photocatalytic performance.In addition,this system exhibited excellent photocatalytic activity towards a wide range of PPCPs.Ultimately,by combining electron spin resonance testing(EPR)and quenching experiments,·O_(2)^(-)and h^(+)were successfully identified as the main active species in the system.This research demonstrated that PhC_(2)Cu/SrO heterojunction photocatalyst possesses certain potential advantages in water treatment applications.

关 键 词：PhC_(2)Cu DCF 电荷转移 分子氧活化 

分 类 号：X703[环境科学与工程—环境工程]