In Situ Co-Crystallization for Fabrication of g-C3N4/Bi5O7I Heterojunction for Enhanced Visible-Light Photocatalysis

被引：170

作者：

Liu, Chengyin ^{[1
]}

Huang, Hongwei ^{[1
]}

Du, Xin ^{[2
]}

Zhang, Tierui ^{[3
]}

Tian, Na ^{[1
]}

Guo, Yuxi ^{[1
]}

Zhang, Yihe ^{[1
]}

机构：

[1] China Univ Geosci, Sch Mat Sci & Technol, Beijing Key Lab Mat Utilizat Nonmetall Minerals &, Natl Lab Mineral Mat, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Dept Chem & Biol Engn, Res Ctr Bioengn & Sensing Technol, Beijing 100083, Peoples R China

[3] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2015年 / 119卷 / 30期

关键词：

POLYMERIC G-C3N4; CRYSTAL-STRUCTURE; TIO2; NANOPARTICLES; SURFACE;

D O I：

10.1021/acs.jpcc.5b03707

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：

We developed for the first tithe an in situ co-crystallization route for fabrication of a heterojunctional photocatalyst g-C3N4/Bi5O7I by adopting melamine and BiOI as coprecursors. This synthetic Method enables intimate interfacial interaction with chemical bonding between g-C3N4 and Bi5O7I, which is beneficial for charge transfer at the interface. The photocatalysis properties of g-C3N4/Bi5O7I composites were studied by photodegradation of Rhodarnine B (RhB) and phenol and generation of transient photocurrent with illumination of visible-light (lambda > 420 nm), The results revealed that the g-C3N4/Bi5O7I composite shows enhanced photocatalytic reactivity compared to the pristine g-C3N4 and Bi5O7I samples. Investigations on the behaviors of charge carriers via electrochemical impedance spectra (EIS) and photoluminescence (PL) spectra suggests that the g-C3N4/Bi5O7I heterojunctional structure constructed of the in situ cothermolysis approach is responsible for the efficient separation and transfer of photogenerated electrons (e(-)) and holes (h(+)), thus giving rise to the higher photocatalytic activity. The present work opens a new avenue for manipulation of high-performance semiconductor heterojunction for photocatalytic and photoelectrochemical application.

引用

页码：17156 / 17165

页数：10

共 35 条

[1] Understanding promotion of photocatalytic activity of TiO2 by Au nanoparticles [J].