复合材料δ-FeOOH/MoS_(2)/g-C_(3)N_(4)在光辅助下活化PMS降解RhB的研究  

The degradation of RhB byδ-FeOOH/MoS_(2)/g-C_(3)N_(4)composites activating PMS under visible light

作　　者：陈勇号 赵丹[1] 孙天奇 董延茂[2] CHEN Yonghao;ZHAO Dan;SUN Tianqi;DONG Yanmao(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009;School of Chemistry and Life Sciences,Suzhou University of Science and Technology,Suzhou 215009)

机构地区：[1]苏州科技大学环境科学与工程学院,苏州215009 [2]苏州科技大学化学与生命科学学院,苏州215009

出　　处：《环境科学学报》2024年第1期228-241,共14页Acta Scientiae Circumstantiae

基　　金：苏州区域水质改善和水生态安全技术与综合示范项目(No.2017ZX07205);苏州市产业化前瞻项目(No.SYG201744)。

摘　　要：采用超声-共沉淀法成功制备了δ-FeOOH/MoS_(2)/g-C_(3)N_(4)(CMF)材料,并在可见光下活化过一硫酸盐(PMS)降解染料罗丹明B(RhB).同时,通过XRD、SEM、UV-vis DRS、FTIR和XPS等仪器对催化剂进行了分析.结果表明,10-CMF粒径约为200~400 nm;催化剂对RhB(30 mg·L^(-1))在50 min内可降解99.99%.其优异的催化性能归因于双金属活化PMS和异质结的构建抑制了电子-空穴对复合的双重协同作用.此外,10-CMF在实际水基质(池塘水和自来水)中仍然表现出较好的催化效果,具有较强的抗干扰能力.通过自由基淬灭和EPR分析确定了该体系中的主要活性物质为h+和^(1)O_(2),并提出了可能的降解途径.最后,催化剂经过5次循环实验后,对RhB的去除率仍然达到90.16%,说明材料具有较好的使用寿命.本研究为可见光辅助催化剂活化PMS降解污染物提供了新的解决方案,并在实际废水处理中具有良好的应用前景.Theδ-FeOOH/MoS_(2)/g-C_(3)N_(4)(CMF)photocatalyst were prepared by ultrasound-coprecipitation method.The CMF was activated by peroxymonosulfate(PMS)under visible light to degrade the organic dye rhodamine B(RhB).The materials were characterized by XRD,SEM,UV-vis DRS,FTIR and XPS.Results show that the particle size of 10-CMF is about 200~400 nm;99.99%RhB(30 mg·L^(-1))could be degraded by catalyst within 50 minutes.The excellent catalytic performance is attributed to the inhibition of electron-hole double synergy by bimetallic activated PMS and heterostructures.In addition,10-CMF shows good catalytic effect and strong anti-interference ability in actual water matrix,such as pond water and tap water.The main active components of the 10-CMF/PMS/vis system were determined to be h+and^(1)O_(2)by free radical quenching experiment and Electron Paramagnetic Resonance(EPR).The suggested degradation pathways was studied.Finally,the removal rate of RhB could reach 90.16%after 5 cycles of experiment,indicating a good service life of catalyst.This study provides a new solution for the visible light-assisted catalyst activation of PMS for the degradation of pollutants.We look forward to the application in practical wastewater treatment.

关 键 词：二硫化钼 δ-FeOOH g-C_(3)N_(4) 光催化 实际废水 过硫酸盐 

分 类 号：X703[环境科学与工程—环境工程]