ZnO协同过硫酸钠光催化降解孔雀石绿的研究  

STUDY OF PHOTOCATALYTIC DEGRADATION OF MALACHITE GREEN ON ZNO SYNERGIZED WITH SODIUM PERSULFATE

作　　者：黄雅丽[1] 

机构地区：[1]闽江学院化学与化学工程系,福建福州350108

出　　处：《井冈山大学学报（自然科学版）》2017年第4期32-37,共6页Journal of Jinggangshan University (Natural Science)

基　　金：福建省教育厅科技计划项目(JAT160392)

摘　　要：以可见光作为光源,利用分光光度法考察了ZnO协同过硫酸钠光催化降解孔雀石绿溶液的性能。主要探讨了ZnO的煅烧温度、ZnO的投加量、过硫酸钠的投加量以及孔雀石绿溶液初始浓度等因素对脱色率的影响;采用TOC含量测定分析光催化降解孔雀石绿溶液的矿化情况;最后利用XRD对ZnO进行表征。结果表明:ZnO的最佳煅烧温度为600℃,ZnO的最佳投加量为0.5 g/L,过硫酸钠的最佳投加量为1 g/L,当孔雀石绿溶液的初始浓度为15 mg/L时光催化降解效果较好。由TOC测定可知,光催化降解孔雀石绿溶液的过程是逐步进行的,而且可能有无色的中间产物生成。另外,XRD表征结果发现,经600℃煅烧后的ZnO,其衍射峰的峰型更尖锐,结晶度更好,有利于提高光催化性能。The photocatalytic degradation of malachite green on ZnO synergized with sodium persulfate under the illumination of visible light was studied by spectrophotometry. The sintering temperature and the dosage of ZnO, the dosage of sodium persulfate and the initial concentration of malachite green were investigated. The mineralization of malachite green was studied by measuring TOC content. In addition, the catalysts were characterized by XRD. The results showed that the best sintering temperature of ZnO was 600 ℃, the best dosage of ZnO and sodium persulfate were 0.5 g/L and 1 g/L respectively, and when the initial concentration of malachite green was 15 mg/L, it could get better photocatalytic performance. The TOC analysis showed that the photocatalytic reaction occurred gradually, it also suggested that some colorless intermediates might be produced during the reaction process. The XRD characterization suggested that ZnO sintered on 600 ℃ had a better erystaUinity to improve the photocatalytic activity.

关 键 词：光催化 ZNO 过硫酸钠 孔雀石绿 

分 类 号：O643[理学—物理化学]