CdS/Zn-Fe LDO复合材料光催化降解孔雀石绿  

Photocatalytic degradation of malachite green by CdS/Zn-Fe LDO composite materials

作　　者：唐清海 李梦佳 曹珊珊 李小妹 常玥[1,2,3] 查飞[1,2] TANG Qinghai;LI Mengjia;CAO Shanshan;LI Xiaomei;CHANG Yue;ZHA Fei(College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070,Gansu,China;Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education,Lanzhou 730070,Gansu,China;Key Laboratory of Polymer Materials of Gansu Province,Lanzhou 730070,Gansu,China)

机构地区：[1]西北师范大学化学化工学院,甘肃兰州730070 [2]生态环境相关高分子材料教育部重点实验室,甘肃兰州730070 [3]甘肃省高分子材料重点实验室,甘肃兰州730070

出　　处：《精细化工》2020年第11期2342-2347,共6页Fine Chemicals

基　　金：国家自然科学基金(21865031)。

摘　　要：采用沉淀法将CdS与锌铁层状双金属氢氧化物(Zn-Fe LDH)复合,高温煅烧后得到CdS/ZnO-ZnFe2O4复合材料(CdS/Zn-Fe LDO)。利用XRD、SEM、UV-Vis DRS及PL对复合材料的结构、形貌、光学性能进行了表征,研究了该复合材料在可见光下对孔雀石绿的光降解。结果表明,CdS/Zn-Fe LDO复合材料对孔雀石绿的光催化降解能力高于CdS或Zn-Fe LDO。其中,m(CdS)∶m(Zn-Fe LDH)=1∶1配比制备的CdS/Zn-Fe LDO(1∶1)光催化活性最大。光照20 min,20 mg CdS/Zn-Fe LDO(1∶1)对20 mg/L孔雀石绿的光降解率为96.6%。此外,该复合材料还可降解罗丹明B、亚甲基蓝、甲基橙、结晶紫等染料且光降解反应符合一级反应动力学。CdS and zinc iron layered double hydroxides(Zn-Fe LDH)were compounded by precipitation and then by high-temperature calcination to obtain CdS/ZnO-ZnFe2O4 composites(CdS/Zn-Fe LDO).The structure,morphology and optical properties of the composites were characterized by XRD,SEM,UV-Vis DRS and PL.The photodegradation of malachite green by CdS/Zn-Fe LDO was studied under visible light.The results showed that the photocatalytic degradation capacity of CdS/Zn-Fe LDO composites for malachite green were higher than that of CdS or Zn-Fe LDO.CdS/Zn-Fe LDO(1∶1)composite with m(CdS)∶m(Zn-Fe LDH)=1∶1 exhibited the greatest photocatalytic activity among the composites.The degradation rate of malachite green(20 mg/L)by 20 mg CdS/Zn-FeLDO(1∶1)was 96.6% under visible light irradiation for 20 min.Furthermore,the composite could also degrade rhodamine B,methylene blue,methyl orange and crystal violet.The photo degradation reactions were fitted well with the first-order kinetics.

关 键 词：CdS/Zn-Fe LDO 复合材料 光催化 可见光 孔雀石绿 水处理技术 

分 类 号：X703[环境科学与工程—环境工程] O644.1[理学—物理化学]