PhC_(2)Cu/UiO-66-Ce Z型异质结的构建及光催化降解双氯芬酸的机制研究  

Construction of PhC_(2)Cu/UiO-66-Ce Z-Scheme heterojunction and mechanism of photocatalytic degradation of diclofenac

作　　者：张筱昱 林子力 刘铭浩 陈平[1] 吕文英[1] 刘国光[1] ZHANG Xiaoyu;LIN Zili;LIU Minghao;CHEN Ping;LÜWenying;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,粤港澳污染物暴露与健康联合实验室,广东省环境催化与健康风险控制重点实验室,广州510006

出　　处：《环境科学学报》2024年第2期71-82,共12页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金项目(No.22176042,22076029,21906029)。

摘　　要：本研究运用了一种简易操作的方法制备了PhC_(2)Cu/UiO-66-Ce(PUC)直接Z型异质结光催化剂.通过场发射扫描电镜、透射电子显微镜、X射线衍射光谱仪、傅里叶变换红外光谱和紫外可见光漫反射光谱等手段对PUC的形态特征、晶型结构以及化学性能进行表征.以DCF作为目标污染物,考察PUC对水溶液中DCF的光催化降解性能.结果表明,PUC具有优异的光催化性能,80 min内对DCF的降解率为95.06%,其光催化反应速率比单独PhC_(2)Cu提升了3.0倍.DCF的降解率符合伪一级动力学模型和Langmuir-Hinshelwood模型,DCF在偏酸性条件降解速率更佳.根据电子自旋共振测试和自由基捕获实验,提出反应中起主导作用的活性物种为O_(2)^(·-),贡献率接近87.96%.A direct Z-Scheme heterojunction photocatalyst PhC_(2)Cu/UiO-66-Ce(PUC)was prepared using a simple method.The morphological characteristics,crystal structure and chemical properties of PUC were characterized by means of field emission scanning electron microscopy,transmission electron microscopy,X-Ray Diffractometer,Fourier transform infrared spectroscopy and UV-vis diffuse reflectance spectroscopy.The photocatalytic degradation of DCF in aqueous solution by PUC was investigated.The results showed that the PUC has excellent photocatalytic performance on DCF,with a degradation rate of 95.06%in 80 min,3 times greater than the that degraded by PhC_(2)Cu.The degradation of DCF fitted the pseudo-first order kinetic model and Langmuir-Hinshelwood model,and acidity condition was conducive to the degradation activity.According to the electron spin resonance test and free radical trapping,it is proposed that the reactive substances that play a leading role in the reaction was O_(2)^(·-),with a contribution nearly 87.96%.

关 键 词：苯乙炔铜(PhC_(2)Cu) UiO-66-Ce 双氯芬酸(DCF) 直接Z型异质结 

分 类 号：X13[环境科学与工程—环境科学]