Development of double heterojunction of Pr2Sn2O7@Bi2Sn2O7/TiO2 for hydrogen production

被引：14

作者：

Li, Yuejun ^{[1
]}

Cao, Tieping ^{[1
]}

Mei, Zemin ^{[1
]}

Li, Xiaoping ^{[1
]}

Sun, Dawei ^{[1
]}

机构：

[1] Baicheng Normal Univ, Res Ctr Nanophotocatalyst, Baicheng 137000, Jilin, Peoples R China

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2020年 / 142卷 / 142期

基金：

中国国家自然科学基金;

关键词：

Double heterojunction; Photocatalytic; Nanofibers; Bi2Sn2O7; Pr2Sn2O7; ENHANCED PHOTOCATALYTIC ACTIVITY; BISMUTH PYROSTANNATE; TIO2; NANOSHEETS; GRAPHENE; SURFACE; NANOCOMPOSITES; CONSTRUCTION; DEGRADATION; NANOFIBERS; EVOLUTION;

D O I：

10.1016/j.jpcs.2020.109457

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The double heterojunction of Pr2Sn2O7@Bi2Sn2O7/TiO2 composite was prepared by one-step hydrothermal method using TiO2 electrospun nanofibers as substrate. The structures were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet (UV)-visible diffuse reflectance spectroscopy and photoluminescence. The performance of photocatalytic hydrogen production over the composite catalyst was studied under UV-visible light. The Pr2Sn2O7@Bi2Sn2O7/TiO2 composite nanofibers showed high photocatalytic activity for hydrogen production. The hydrogen production rate reached 587.1 mu mol h(-1) g(-1), which was 2.7 and 7.1 times that of Bi2Sn2O7/TiO2 and TiO2, respectively. The main reasons for the high photocatalytic activity included broadened spectral range, 4f-4f transition from Pr3+ of Pr2Sn2O7 and increased separation of the photogenerated carriers by double hetemjunction via direct Z-scheme transfer.

引用

页数：9

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