ZIF-NC/PTCDA复合物可见光光催化活化过二硫酸盐降解水中的诺氟沙星  

Photocatalysis-activated SR-AOP over ZIF-NC/PTCDA composites for boosted norfloxacin degradation

作　　者：唐翅珧 韦娴 王崇臣 TANG Chiyao;WEI Xian;WANG Chongchen(Key Laboratory of Functional Materials for Building Structure and Environment Remediation,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]北京建筑大学建筑结构与环境修复功能材料北京市重点实验室,北京100044

出　　处：《材料工程》2023年第4期48-56,共9页Journal of Materials Engineering

基　　金：国家自然科学基金项目(22176012);北京自然科学基金项目(8202016);北京建筑大学2021年研究生创新项目(PG2021050)。

摘　　要：选用2-甲基咪唑锌(ZIF-8)作为前驱物,经高温煅烧形成多孔网状衍生物氮掺杂碳(ZIF-NC)。通过机械球磨法将ZIF-NC和有机半导体3,4,9,10-苝四甲酸二酐(PTCDA)复合制备ZIF-NC/PTCDA(P_(x)Z_(y))。采用粉末X射线衍射(PXRD),傅里叶红外变换光谱(FTIR),扫描电镜(SEM),紫外-可见漫反射(UV-Vis DRS),X射线光电子能谱(XPS)等对材料的形貌和结构进行表征。研究不同比例ZIF-NC/PTCDA光催化活化过二硫酸盐降解诺氟沙星的效果。探究不同pH值、不同过二硫酸盐(PDS)投加量和共存离子对最佳比例P120Z80降解诺氟沙星性能的影响。经过3次循环后,P120Z80仍对诺氟沙星有较好的降解效果。通过循环前后PXRD,FTIR和SEM等表征进一步证明其具有良好的循环稳定性能。最后,通过电化学测试和活性物质捕捉实验,提出并证实了P120Z80光催化活化过二硫酸盐降解诺氟沙星的机理。Zeolitic imidazolate frameworks-8(ZIF-8)as precursor was calcined at high temperature to prepare N-doped carbon(ZIF-NC).ZIF-NC/PTCDA(P_(x)Z_(y))was fabricated by facile ball milling from the as-prepared ZIF-NC and organic semiconductor 3,4,9,10-perylenetetracarboxylic dianhydride(PTCDA).The morphology and structure of ZIF-NC and PTCDA were characterized by powder X-ray diffraction(PXRD),fourier transform infrared(FTIR),scanning electron microscopy(SEM),UV-Visible diffuse reflectance spectra(UV-Vis DRS)and X-ray photoelectron spectroscopy(XPS),etc.The norfloxacin degradation performance via the photocatalysis-activated sulfate radical-advanced oxidation process(SR-AOP)over PTCDA/ZIF-NC composites with different proportions was studied.The influences of pH value,peroxydisulfate(PDS)dosage and coexisting ions on the norfloxacin degradation over P120Z80 were investigated.After three cycles,the material still maintains good degradation efficiency for norfloxacin.The stability of PTCDA/ZIF-NC was further affirmed by PXRD,FTIR and SEM,etc.Finally,the mechanism of photocatalysis-activated SR-AOP for norfloxacin degradation was proposed,which was clarified by electrochemical tests and active substance capture experiments.

关 键 词：ZIF-8 衍生碳材料 PTCDA 硫酸根自由基 诺氟沙星 

分 类 号：O621.2[理学—有机化学] O641.4[理学—化学]