撞击流法制备纳米ZnS及其光催化性能

Impinging Stream Method Preparation and Photocatalytic Property of ZnS Nanomaterials

分别以廉价易得的3种锌化合物为锌源,Na2S为硫源,基于自制的撞击流设备,采用简单、高效的一步撞击流法制备了分散性良好、尺寸分布均匀、颗粒细小且具有优异光催化性能的ZnS纳米颗粒。探究了不同锌源、反应物浓度和反应温度对紫外光照射下纳米ZnS的光催化性能的影响。研究结果表明:在Zn(NO3)2·6H2O为锌源,反应物浓度为0.2 mol·L^-1,反应温度为80℃的优选条件下,制备的纳米ZnS具有优异的光催化性能和良好的光催化稳定性,以其为催化剂降解甲基橙(MO)溶液12 min,甲基橙的降解率高达99.22%,循环降解3次后甲基橙的降解率仍能保持首次降解率的85.24%。

With three inexpensive and available zinc compounds as zinc source and sodium sulfide as sulfur source,a simple and efficient one-step impinging stream method was used to prepare fine,uniform,and well dispersed ZnS nanoparticles based on self-designed impinging stream equipment.The effects of zinc source,reactant concentration and reaction temperature on photocatalytic properties of ZnS nanoparticles under UV irradiation were investigated.The results showed that the ZnS with best photocatalytic activity and stability was obtained under the reaction condition where Zn(NO3)2·6 H2O was used as zinc source,the reactant concentration was 0.2 mol·L^-1,and the reaction temperature is 80℃.The corresponding optimal degradation of methyl orange(MO)in 12 min reached 99.22%,and the degradation after three cycling test retained 85.24%of the original run.