用硫酸氧钛构建硫酸化二氧化钛纳米颗粒以增强光催化产氢性能。

construction of sulfated TiO nanoparticles with TiOSO for enhanced photocatalytic hydrogen production.

作者信息

Shao Xueqing, Xiao Feng, Zhao Xueying, Hou Zhiyan, Yue Fan, Wang Lu, Wu Ronglan, Wang Jide, Su Xintai, Yang Chao

机构信息

Ministry Key Laboratory of Oil and Gas Fine Chemicals, School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830046, China.

School of Environment and Energy, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), South China University of Technology, Guangzhou, Guangdong 510006, China.

出版信息

Nanoscale. 2021 Jan 21;13(2):901-911. doi: 10.1039/d0nr06436j.

DOI:10.1039/d0nr06436j

PMID:33367362

Abstract

Photocatalytic hydrogen production from water is a promising method to obtain clean energy in the future. In this work, the sulfated TiO2 photocatalyst is successfully constructed in situ via a soft-templated method for photocatalytic water splitting to produce hydrogen. The content of sulfate species in TiO2 can be tuned by changing the amount of the surfactant. The photocatalyst with the appropriate content of sulfate ions exhibits an apparent quantum efficiency (AQE) of 3.9% at 365 nm and a high hydrogen production rate of 24.32 mmol h-1 g-1, which is 1.65 times that of commercial TiO2 (P25). The optimized photocatalyst has excellent photocatalytic activity for hydrogen evolution benefitting from the presence of sulfate ions on the surface of TiO2, large surface area and oxygen vacancies, which facilitates the rapid migration of photo-generated electrons to its surface and the improvement of the separation efficiency of photo-generated carriers. This work may inspire the rational design and the development of high-efficiency photocatalysts.

摘要

光催化水制氢是未来获取清洁能源的一种很有前景的方法。在这项工作中，通过软模板法成功原位构建了硫酸化二氧化钛光催化剂用于光催化水分解制氢。二氧化钛中硫酸根物种的含量可通过改变表面活性剂的用量来调节。具有适当硫酸根离子含量的光催化剂在365 nm处表现出3.9%的表观量子效率（AQE）和24.32 mmol h-1 g-1的高产氢速率，是商用二氧化钛（P25）的1.65倍。优化后的光催化剂具有优异的光催化析氢活性，这得益于二氧化钛表面存在硫酸根离子、大表面积和氧空位，这有利于光生电子快速迁移到其表面并提高光生载流子的分离效率。这项工作可能会激发高效光催化剂的合理设计与开发。