摘要
采用溶剂热法制备了坡缕石/Al掺杂Cd S复合材料(PGS/Cd S-Al),运用XRD、XPS、SEM、UV-Vis DRS及PL对材料的结构、形貌以及光学性能进行了表征。结果表明,Al元素成功掺杂到Cd S中,Cd S的晶体结构没有改变,但其禁带宽带变宽。可见光照射下,该复合材料对孔雀石绿、亚甲基蓝、甲基橙、结晶紫、罗丹明B有机染料均有光催化降解活性,且对罗丹明B的光催化降解效果最好。光照40 min,质量浓度为0.67 g/L 15%PGS/Cd S-Al(15%为PGS的负载量,以生成的Cd S质量计)对30m L质量浓度为20mg/L罗丹明B的降解率为98.7%,反应主要活性基团是h+。该降解反应符合一级动力学,反应速率常数为0.067 min^(–1)。
Palygorskite/Al-doped Cd S composites(PGS/CdS-Al)were prepared by solvothermal method.The structure,morphology and optical properties of the composites were characterized by XRD,XPS,SEM,UV-Vis DRS and PL.The results showed that Al element was successfully doped into the lattice of CdS,which didn’t destroy the crystal structure of CdS and widened the band gap of CdS.Under visible light illumination,PGS/CdS-Al had photocatalytic degradation activity for organic dyes,such as malachite green,methylene blue,methyl orange,crystal violet and rhodamine B,and exhibited the best photocatalytic degradation effect for rhodamine B.The photodegradation rate of 30 mL rhodamine B solution with a mass concentration of 20 mg/L was 98.7%by the mass concentration of 0.67 g/L 15%PGS/CdS-Al(15%is loading amount of PGS,based on the mass of generated CdS)under light illumination for 40 min.Holes were the main activity group in photocatalytic reaction.The photodegradation reaction followed the first order kinetics and the rate constant was 0.067 min^(–1).
作者
李德丽
唐忠家
田丽君
常玥
查飞
LI Deli;TANG Zhongjia;TIAN Lijun;CHANG Yue;ZHA Fei(College of Chemistry&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)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2021年第12期2485-2491,共7页
Fine Chemicals
基金
国家自然科学基金(21865031)。
关键词
Al掺杂Cd
S
坡缕石
可见光
光催化降解
罗丹明B
功能材料
Al-doped CdS
palygorskite
visible light
photocatalytic degradation
rhodamine B
functional materials
作者简介
李德丽(1996-),女,硕士生,E-mail:1078287257@qq.com;联系人:常玥(1970-),女,教授,E-mail:cy70@sina.com。
