Enhancement of photocatalytic activity for BiPO4 via phase junction

被引：115
|
作者：
Zhu, Yanyan [1 ,2 ]
Liu, Yanfang [1 ]
Lv, Yanhui [1 ]
Ling, Qiang [2 ]
Liu, Di [1 ]
Zhu, Yongfa [1 ]
机构：
[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
[2] Inst Aeronaut Meteorol & Chem Def, Beijing 100085, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2014年 / 2卷 / 32期
基金：
美国国家科学基金会; 国家高技术研究发展计划(863计划);
关键词：
BISMUTH PHOSPHATE NANORODS; SURFACE OXYGEN VACANCY; CALCINATION TEMPERATURE; PERFORMANCE ENHANCEMENT; SONOCHEMICAL SYNTHESIS; HYDROTHERMAL METHOD; DEGRADATION; TIO2; HETEROJUNCTION; BIPO4/BIVO4;
D O I：
10.1039/c4ta01807a
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：
BiPO4 with a phase junction was synthesized by calcinating hexagonal BiPO4(HBIP) at different temperatures. The phase structures of BiPO4 were gradually transformed from HBIP to monazite monoclinic BiPO4 (nMBIP) and monoclinic BiPO4 (mMBIP) with increasing calcination temperature. The enhancement of the photocatalytic performance and photocurrent were ascribed to the formation of phase junction. A nMBIP-mMBIP surface-phase junction was formed in BIPO4 when HBIP was calcined at 500 C degrees, and its photocatalytic activity was 28.7 times as high as that of HBIP. Moreover, radical trapping experiments confirmed that the hole was the active species for BiPO4 on the degradation of methylene blue.
引用
收藏
页码：13041 / 13048
页数：8
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