Zr-S-TiO2纳米材料的制备及其光催化降解诺氟沙星

Preparation of Zr-S-TiO Nanomaterials and Photocatalytic Degradation of NOFfloxacin

作者采用固相法合成了不同Zr、S掺杂比的Zr-S-TiO2纳米材料催化剂,并运用XRD、SEM、FTIR等技术进行物相形貌表征及元素组成分析,以UV-Vis研究了催化剂对水中诺氟沙星(NOF)的可见光降解性能,采用LC-MS对NOF的降解产物进行质谱检测,进而研究Zr-S-TiO2催化剂对诺氟沙星的降解机理。结果表明,Zr和S成功掺入到TiO2晶格或晶格间隙中,Zr-S-TiO2纳米材料紫外吸收光谱发生明显的红移现象;Zr-S-TiO2(摩尔比Zr∶S)=1∶9)光催化1 h对诺氟沙星的降解率达98.4%;LC-MS分析NOF的3种降解产物,推测Zr-S-TiO2纳米材料光催化降解诺氟沙星的主要降解途径是脱氟和开环作用。

Zr-S-TiO2 nanomaterials with different Zr and S doping ratio were synthesized by solid phase method.XRD,SEM and FTIR were used to characterize the phase morphology and analyze the element composition.UV-Vis was used to study the visible light degradation of NOFfloxacin(NOF).LC-MS was used to detect the degradation products of NOF,and then degradation mechanism of Zr-S-TiO2 was studied.The results show that Zr and S are successfully incorporated into TiO2 lattice or lattice gap.The degradation rate of NOFfloxacin by Zr-S-TiO2(mole ratio Zr∶S=1∶9)photocatalysis for 1 h was98.4%.The three degradation products of NOF were analyzed by LC-MS,and it was inferred that the main degradation pathway of NOFfloxacin by Zr-S-TiO2 nano materials was defluorination and ring opening.