Preparation and visible-light driven photocatalytic activity of the rGO/TiO2/BiOI heterostructure for methyl orange degradation

被引：30

作者：

Jin, Yu-han ^{[1
]}

Li, Chun-mei ^{[1
]}

Zhang, Yan-feng ^{[1
]}

机构：

[1] Hebei Normal Univ, Coll Chem & Mat Sci, Natl Demonstrat Ctr Expt Chem Educ, Hebei Key Lab Inorgan Nanomat, Shijiazhuang 050024, Hebei, Peoples R China

来源：

NEW CARBON MATERIALS | 2020年 / 35卷 / 04期

基金：

中国国家自然科学基金;

关键词：

rGO/TiO2/BiOI; Heterojunction; Photocatalytic activity; PERFORMANCE; TIO2; NANOPARTICLES; FABRICATION; NANOSHEETS;

D O I：

10.1016/S1872-5805(20)60496-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Reduced graphene oxide (rGO)/TiO2/BiOI ternary composites with different Bi/Ti molar ratios were prepared by a hydrothermal method. Their photocatalytic activities were investigated using methyl orange as a simulated pollutant. SEM, XRD, UV-vis diffuse reflectance spectroscopy, XPS and electrochemical tests were used to characterize their microstructures, light absorption properties and the mobility of photogenerated carriers. Results show that under visible light irradiation, the rGO/TiO2/BiOI composite with a Bi/Ti molar ratio of 80% exhibits a highest degradation rate of 98% for methyl orange within 20 min. The TiO2 nanoparticles are uniformly attached to BiOI nanosheets that are stacked on rGO sheets to form a heterostructure. The heterostructured rGO/TiO2/BiOI has strong visible light absorption, which improves the separation efficiency of the photogenerated carriers and accelerates the carrier migration rate, thus increasing the photocatalytic activity of the catalyst.

引用

页码：394 / 400

页数：7

共 19 条

[1] Indirect Z-Scheme Assembly of 2D ZnV2O6/RGO/g-C3N4 Nanosheets with RGO/pCN as Solid-State Electron Mediators toward Visible Light-Enhanced CO2 Reduction [J].