高通量筛选技术用于金属硫化物修饰的TiO_2的光催化性能分析

Analysis on Photocatalytic Performance of Metal Sulfide Modified TiO_2 by High-throughput Screening Technology

基于高通量筛选技术和喷墨打印,建立了一种快速分析不同配比的光催化剂催化效率的方法。采用光刻法制备了具有数以千计的独立反应单元的微反应芯片,选择Ni、Cd、Zn 3种金属元素掺杂TiO_2,建立了900种不同组装硫化物金属TiO_2催化剂库。再以不同微反应单元的荧光为基础,通过一次实验反应,快速筛选出具有不同比例的3种高效光催化材料的微反应芯片:(Ni_(0.28)Cd_(0.32)Zn_(0.40)) SX/TiO_2,(Ni_(0.43)Cd_(0.29)Zn_(0.28))SX/TiO_2,(Ni_(0.17)Cd_(0.56)) SX/TiO_2。此外,通过宏观验证实验对筛选出的3种催化剂活性进行验证,同时与纯TiO_2降解曙红溶液进行对比。结果测得3种催化剂的降解率分别达94.2%、90.5%和87.6%,而纯TiO_2的降解效率最低(41.3%)。表明筛选出的3种催化剂对曙红溶液具有高效的光催化降解性能。

Based on high-throughput screening technology and inkjet printing,a rapid method was established for the analysis on photocatalytic efficiencies of photocatalysts with different proportions.In this experiment,a microreaction chip with thousands of independent reaction units was prepared by photolithography,and three metal elements of Ni,Cd and Zn were selected to dope into TiO 2.Then a catalyst library including 900 different metal sulfides assembled TiO 2 was established.Three high efficiency of photocatalytic materials with different ratios:(Ni 0.28 Cd 0.32 Zn 0.40)SX/TiO 2,(Ni 0.43 Cd 0.29 Zn 0.28)SX/TiO 2 and(Ni 0.17 Cd 0.56 Zn 0.27)SX/TiO 2 were quickly screened out on the basis of the fluorescence emitted by different microreaction units through once experimental reaction.In addition,the activities for three catalysts were verified by macro verification experiments,and a group of pure TiO 2 degraded eosin solutions without load were compared.Results showed that the degradation rates for 3 catalysts were 94.2%,90.5%and 87.6%,respectively,while the pure TiO 2 without load had the lowest degradation efficiency(41.3%).The results showed that the as-prepared catalysts were of high efficiency in photocatalytic degradation on eosin solution.