ZnO纳米纤维光催化燃油脱氮性能

Photocatalytic performance of ZnO nanofibers for fuel denitrification

以二水乙酸锌、聚乙烯吡咯烷酮为原料,以无水乙醇和N,N-二甲基甲酰胺为溶剂,采用静电纺丝法成功的合成了ZnO纳米纤维。通过XRD与SEM表征手段分析了所获产品的结构与表面形貌。为探究该方法制备的ZnO纳米纤维的光催化燃油脱氮性能,选择吡啶/石油醚溶液为模拟油。w(吡啶)=100μg/g,pH=7,ZnO纳米纤维投加量为75 mg/L,可见光照射120 min,脱氮率可达92.2%。活性物种捕获实验证明在ZnO纳米纤维光催化脱氮体系中起主要作用的活性物种为空穴。

ZnO nanofibers were successfully synthesized by electrostatic spinning,using zinc acetate dihydrate and polyvinylpyrrolidone as raw materials,anhydrous ethanol and N,N-dimethyl formamide as solvent.The structure and surface morphology of the products were analyzed by XRD and SEM.In order to investigate the photocatalytic denitrification performance of ZnO nanofibers prepared by this method,pyridine/petroleum ether solution was selected as the simulated oil.When the concentration of pyridine was 100μg/g,pH=7,and the dosage of ZnO nanofibers was 75 mg/L,the denitrification rate reached 92.2%after visible light irradiation for 120 min.The active species capture experiment proved that the main active species in the photocatalytic denitrification system of ZnO nanofibers were holes.