Synthesis and facet-dependent enhanced photocatalytic activity of Bi2SiO5/AgI nanoplate photocatalysts

被引：132
作者：
Wan, Zhen [1 ,2 ]
Zhang, Gaoke [1 ,2 ]
机构：
[1] Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Peoples R China
[2] Hubei Prov Collaborat Innovat Ctr High Efficient, Wuhan 430070, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 32期
关键词：
EXPOSED; 001; FACETS; ORGANIC CONTAMINANTS; HIGH-EFFICIENCY; DEGRADATION; COMPOSITE; NANOPARTICLES; MICROCRYSTALS; NANOSHEETS; REDUCTION;
D O I：
10.1039/c5ta03465e
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Novel Bi2SiO5/AgI nanoplate photocatalysts with exposed {100} facets on the surfaces of Bi2SiO5 nanoplates were synthesized via an in situ precipitation method. Acid red G aqueous solution and gaseous formaldehyde were chosen as model organic pollutants to evaluate the photocatalytic activities of the as-prepared catalysts. Under visible light irradiation (>420 nm), the Bi2SiO5/AgI nanoplates exhibited enhanced photocatalytic activities as compared to pure Bi2SiO5 or AgI. X-ray photoelectron spectroscopy (XPS) reveals that a small amount of metallic Ag was formed on the surface of AgI during the photocatalytic reaction, thus leading to the transformation from Bi2SiO5/AgI to Bi2SiO5/AgI@ Ag. The excellent photocatalytic activities of the Bi2SiO5/AgI nanoplates can be ascribed to the photocatalytic system composed of Bi2SiO5, AgI and metallic Ag and the inner electric field caused by the exposure of {100} facets on the Bi2SiO5 nanoplates. The as-prepared catalysts retained good photocatalytic activity after four recycles and the radical species involved in the degradation process have been investigated by using PL spectra and trapping experiments.
引用
收藏
页码：16737 / 16745
页数：9
相关论文
共 41 条
[1]   Concaving Agl sub-microparticles for enhanced photocatalysis [J].
An, Changhua ;
Liu, Junxue ;
Wang, Shutao ;
Zhang, Jun ;
Wang, Zhaojie ;
Long, Ran ;
Sun, Yugang .
NANO ENERGY, 2014, 9 :204-211
[2]   Hollow AgI:Ag Nanoframes as Solar Photocatalysts for Hydrogen Generation from Water Reduction [J].
An, Changhua ;
Wang, Jizhuang ;
Liu, Junxue ;
Wang, Shutao ;
Sun, Yugang .
CHEMSUSCHEM, 2013, 6 (10) :1931-1937
[3]   Facet Effect of Single-Crystalline Ag3PO4 Sub-microcrystals on Photocatalytic Properties [J].
Bi, Yingpu ;
Ouyang, Shuxin ;
Umezawa, Naoto ;
Cao, Junyu ;
Ye, Jinhua .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2011, 133 (17) :6490-6492
[4]   Heteroepitaxial growth of platinum nanocrystals on AgCl nanotubes via galvanic replacement reaction [J].
Bi, Yingpu ;
Ye, Jinhua .
CHEMICAL COMMUNICATIONS, 2010, 46 (09) :1532-1534
[5]   Preparation, characterization and visible-light photocatalytic activity of AgI/AgCl/TiO2 [J].
Cao, Jing ;
Xu, Benyan ;
Luo, Bangde ;
Lin, Haili ;
Chen, Shifu .
APPLIED SURFACE SCIENCE, 2011, 257 (16) :7083-7089
[6]   The dominant {001} facet-dependent enhanced visible-light photoactivity of ultrathin BiOBr nanosheets [J].
Chen, Jing ;
Guan, Meili ;
Cai, Weizheng ;
Guo, Jinju ;
Xiao, Chong ;
Zhang, Gaoke .
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2014, 16 (38) :20909-20914
[7]   Template-Free Hydrothermal Synthesis and Photocatalytic Performances of Novel Bi2SiO5 Nanosheets [J].
Chen, Ruigen ;
Bi, Jinhong ;
Wu, Ling ;
Wang, Wanjun ;
Li, Zhaohui ;
Fu, Xianzhi .
INORGANIC CHEMISTRY, 2009, 48 (19) :9072-9076
[8]   Study on the separation mechanisms of photogenerated electrons and holes for composite photocatalysts g-C3N4-WO3 [J].
Chen, Shifu ;
Hu, Yingfei ;
Meng, Sugang ;
Fu, Xianliang .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2014, 150 :564-573
[9]   High-Efficiency Visible-Light-Driven Ag3PO4/AgI Photocatalysts: Z-Scheme Photocatalytic Mechanism for Their Enhanced Photocatalytic Activity [J].
Chen, Zhihong ;
Wang, Weilin ;
Zhang, Zhengguo ;
Fang, Xiaoming .
JOURNAL OF PHYSICAL CHEMISTRY C, 2013, 117 (38) :19346-19352
[10]   Facile solvothermal synthesis of uniform sponge-like Bi2SiO5 hierarchical nanostructure and its application in Cr(VI) removal [J].
Cheng, Gang ;
Xiong, Jinyan ;
Yang, Hao ;
Lu, Zhong ;
Chen, Rong .
MATERIALS LETTERS, 2012, 77 :25-28
12345