摘要
用弱碱性阴离子交换树脂D301R对Keggin型铬取代磷钨杂多阴离子PW11O39Cr(Ⅲ)(H2O)4-(PW11Cr)与Keggin型铁取代磷钨杂多阴离子PW11O39Fe(Ⅲ)(H2O)4-(PW11Fe)进行吸附,制备了具有可见光响应的固体光催化剂。分别考查了所制备的光催化剂在均相及异相体系中对罗丹明B(RhB)降解的光催化活性。实验结果表明:当铁、铬离子取代的磷钨杂多阴离子同时存在时,RhB溶液的降解效率均高于单一金属离子取代的磷钨杂多阴离子光催化剂,并且异相体系的光催化效率高于均相体系。当催化剂D301R/PW11Cr/PW11Fe加入量为100 mg时,10μmol/L的RhB水溶液在可见光(λ> 420 nm)照射50 min后,降解率可达92%。
Keggin-type chromium-substituted phosphorus-tungsten heteropolyanion PW11O39Cr(Ⅲ)(H2O)4-(PW11Cr) and Keggin-type iron-substituted phosphorus-tungsten heteropolyanion PW11O39Fe(Ⅲ)(H2O)4-(PW11Fe) were adsorbed by weakly basic anion exchange resin D301R to prepare a solid photocatalyst with visible light response. The photocatalytic activities of as prepared samples toward RhB degradation were conducted in homogeneous and heterogeneous systems, respectively. PW11Fe/PW11Cr and PW11Fe/PW11Cr/D301R possess higher photocatalytic activity compared to those of PW11Fe(PW11Cr) and PW11Fe/D301R(PW11Cr/D301R) in the degradation of RhB, respectively. In addition, the photocatalytic activity of PW11Fe/PW11Cr/D301R is higher than that of PW11Fe/PW11Cr. After 50 minutes irradiation by visible light(λ>420 nm), the degradation rate of RhB(10 μmol/L) reaches 92% when the dosage of D301R/PW11Cr/PW11Fe is 100 mg.
作者
华英杰
李利娜
Iliyas zhanmukamet
王崇太
马健
HUA Yingjie;LI Lina;ILIYAS zhanmukamet;WANG Chongtai;MA Jian(Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province,College of Chemistry and Chemical Engineering,Hainan Normal University,Haikou 571158,China)
出处
《海南师范大学学报（自然科学版）》
CAS
2020年第1期18-23,43,共7页
Journal of Hainan Normal University（Natural Science）
基金
海南省社会发展专项(ZDYF2017083)
海南省2019年研究生创新科研课题(Hys2019-276)
海南师范大学2018年度研究生创新科研课题(Hsyx-2018-24)。
