Photocatalytic H2 evolution of porous silicon derived from magnesiothermic reduction of mesoporous SiO2

被引：32

作者：

Sun, Hewei ^{[1
,2
]}

Chen, Jingjing ^{[1
,2
]}

Liu, Shan ^{[1
,2
]}

Agrawal, Dinesh Kumar ^{[3
]}

Zhao, Yang ^{[4
]}

Wang, Dajian ^{[1
,2
]}

Mao, Zhiyong ^{[1
,2
]}

机构：

[1] Tianjin Univ Technol, Sch Mat Sci & Engn, Tianjin Key Lab Photoelect Mat & Devices, Tianjin 300384, Peoples R China

[2] Tianjin Univ Technol, Key Lab Display Mat & Photoelect Devices, Minist Educ, Tianjin 300384, Peoples R China

[3] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA

[4] Hangke Tianjin Aeronaut Equipment Co Ltd, Tianjin 300000, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2019年 / 44卷 / 14期

基金：

中国国家自然科学基金;

关键词：

Photocatalyst; Porous silicon; H-2; evolution; Magnesiothermic reduction; HYDROGEN-PRODUCTION; WATER; NANOSTRUCTURES; FABRICATION; SPHERES; CO;

D O I：

10.1016/j.ijhydene.2019.01.270

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：

In this work, porous silicon (PSi) was synthesized by magnesiothermic reduction of mesoporous SiO2 (MCM-41) and its photocatalytic hydrogen evolution performance was investigated. The unique mesoporous structure of PSi expands the band gap of silicon and shifts its conduction band to a more negative position. As a result, excellent photocatalytic water splitting efficiency of 604.7 mu mol h(-)(1) g(-1 )under visible-light radiation is recorded for the synthesized PSi photocatalysts without loading noble metal cocatalysts. This study presented a promising visible light response photocatalysts for the generation green renewable hydrogen energy basing on PSi material deriving from simple magnesiothermic reduction of mesoporous SiO2. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：7216 / 7221

页数：6

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