ZnFe_(2)O_(4)/NiAl/RGO复合材料的制备及其光催化降解抗生素性能  

Preparation of ZnFe_(2)O_(4)/NiAl/RGO Nanocomposite and Its Photocatalytic Performance in Antibiotic Degradation

作　　者：赵宜涛[1,2] 高志锋 罗静 钱惺悦 何光裕 陈群[1] 孟启[1] 陈海群[1] ZHAO Yitao;GAO Zhifeng;LUO Jing;QIAN Xingyue;HE Guangyu;CHEN Qun;MENG Qi;CHEN Haiqun(Jiangsu Advanced Catalysis and Green Manufacturing Collaborative Innovation Center,Changzhou University,Changzhou 213164,China;Jiangsu Province Engineering Research Center of Special Functional Textile Materials,Changzhou Vocational Institute of Textile and Garment,Changzhou 213164,China)

机构地区：[1]常州大学,江苏省绿色催化材料与技术重点实验室,江苏常州213164 [2]常州纺织服装职业技术学院,江苏省特种功能纺织材料工程研究中心,江苏常州213164

出　　处：《化学反应工程与工艺》2022年第4期329-337,共9页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金项目(21978026,22078028);江苏省研究生科研与实践创新计划项目(KYCX21_2795);常州纺织服装职业技术学院科技创新团队项目(CFTD202103)。

摘　　要：通过简单的溶剂热法制备了可磁分离的石墨烯基铁酸锌/镍铝层状双氢氧化物(ZnFe_(2)O_(4)/NiAl/RGO)光催化剂,实现了ZnFe_(2)O_(4)/NiAl/RGO纳米复合物的可控生长与氧化石墨烯(GO)的还原同步进行,并将所制备的催化剂用于环丙沙星(CIP)的催化降解。采用X射线衍射(XRD)、傅立叶变换红外光谱(FTIR)、紫外可见漫反射光谱(UV-Vis)、拉曼光谱(Raman)和透射电子显微镜(TEM)对光催化剂复合物的组成与形貌进行了分析。结果表明:ZnFe_(2)O_(4)/NiAl颗粒成功负载在石墨烯表面,NiAl层状双金属氢氧化物的复合可有效增强ZnFe_(2)O_(4)在可见光范围的响应,还原氧化石墨烯(RGO)可抑制ZnFe_(2)O_(4)/NiAl异质结的团聚,提高光催化性能。在模拟可见光照射下CIP的光降解效率约为96.2%,准一级动力学常数分别是ZnFe_(2)O_(4)/NiAl和ZnFe_(2)O_(4)的3.6倍和10.1倍,异质结的构建和RGO的负载可有效抑制ZnFe_(2)O_(4)的团聚,增加活性位点数量,提高光生电荷的分离和传输效率,延长光生在载流子寿命,从而有效增强ZnFe_(2)O_(4)的光催化活性。The magnetic and separable photocatalyst of ZnFe_(2)O_(4)/NiAl/RGO was prepared by a simple solvothermal method,in which the controlled growth of ZnFe_(2)O_(4)/NiAl/RGO nanocomposites was achieved simultaneously with the reduction of graphene oxide(GO),and the photocatalyst was evaluated for the catalytic degradation of ciprofloxacin(CIP).X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),UV-visible diffuse reflectance spectroscopy(UV-Vis),Raman spectroscopy and transmission electron microscopy(TEM)were used to analyze the structure and composition of the photocatalyst composite.The results showed that ZnFe_(2)O_(4)/NiAl particles were successfully loaded on the surface of reduced grapheme oxide(RGO),and the introducing of NiAl layer double hydroxides could effectively enhance the response of ZnFe_(2)O_(4) in the visible light range.The role of RGO inhibited the agglomeration of the ZnFe_(2)O_(4)/NiAl heterojunction,which improved its photocatalytic performance.The photo-degradation efficiency of CIP under simulated visible light irradiation was about 96.2%,and the constants of the quasi-first order kinetic constants were 3.6 and 10.1 times greater than that of ZnFe_(2)O_(4)/NiAl and ZnFe_(2)O_(4),respectively.The construction of the heterojunction and the loading of RGO can effectively inhibit the agglomeration of ZnFe_(2)O_(4),increasing the number of active sites,improving the separation and transport efficiency of photogenerated charges,and prolonging the lifetime of photo-generated carriers,thereby effectively enhancing the photocatalytic activity of ZnFe_(2)O_(4).

关 键 词：磁性分离 石墨烯 层状双金属氢氧化物 光催化降解 环丙沙星 

分 类 号：O643.3[理学—物理化学]