Convenient synthesis of twin-Christmas tree-like PbWO4 microcrystals and their photocatalytic properties  

作　　者：Jin ZHANG Li-Li PENG Ying TANG Huijie WU 

机构地区：[1]College of Materials and Chemical Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China [2]Chongqing Key Laboratory of Environmental Materials & Remediation, Chongqing 402160, China [3]Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing 400715, China

出　　处：《Frontiers of Materials Science》2017年第2期139-146,共8页材料学前沿（英文版）

摘　　要：Novel twin-Christmas tree-like PbWO4 microcrystals have been prepared via a convenient aqueous solution route at room temperature under the assistance of 13- cyclodextrin （13-CD）. The product was characterized by XRD, EDX, SEM, TEM, UV-vis and PL and BET techniques. It was found that 13-CD plays an important role in the forming of twin-Christmas tree-like PbWO4 microcrystals. A five-step growth mechanism was proposed to explain the formation of such twin-Christmas tree-like structures. The photocatalytic performance of PbWO4 microcrystals was evaluated by measuring the decomposition rate of methylene blue （MB） and malachite green （MG） solution under the UV irradiation, and the photocatalytic results indicated that as-prepared PbWO4 microcrystals exhibit good and versatile photocatalytic activity as well as excellent recyclability.Novel twin-Christmas tree-like PbWO4 microcrystals have been prepared via a convenient aqueous solution route at room temperature under the assistance of 13- cyclodextrin （13-CD）. The product was characterized by XRD, EDX, SEM, TEM, UV-vis and PL and BET techniques. It was found that 13-CD plays an important role in the forming of twin-Christmas tree-like PbWO4 microcrystals. A five-step growth mechanism was proposed to explain the formation of such twin-Christmas tree-like structures. The photocatalytic performance of PbWO4 microcrystals was evaluated by measuring the decomposition rate of methylene blue （MB） and malachite green （MG） solution under the UV irradiation, and the photocatalytic results indicated that as-prepared PbWO4 microcrystals exhibit good and versatile photocatalytic activity as well as excellent recyclability.

关 键 词：PBWO4 twin-Christmas tree-like growth mechanism UV irradiation PHOTOCATALYST 

分 类 号：TB3[一般工业技术—材料科学与工程]