Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 41, Issue 18, Pages 7292-7300Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2016.03.137
Keywords
Boron-doped TiO2; {001} facet; Photocatalytic H-2 production; g-C3N4
Categories
Funding
- Guangdong Natural Science Foundation [2015A030310431, 2015A030313893]
- Lingnan Normal University Natural Science Foundation [LZL1505, LZL1501]
- Climbing Program Guangdong College Students in Science and Technology Innovation Project
- Zhanjiang Special Competitive Allocation of Financial Capital Project [2015A02028]
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Herein, an anatase boron-doped TiO2 (B-TiO2) with exposed {001} facets was synthesized for the first time via a solvothermal synthetic route using NaBF4 as the morphology controlling agent, and composited with the g-C3N4 formation of B-TiO2-001/g-C3N4 hetero-junctions. The structure and optical properties of the B-TiO2-001/g-C3N4 were characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, UV vis diffuse reflectance spectroscopy and photoluminescence spectroscopy. The results show that g-C3N4 uniformly covered on anatase B-TiO2, exposing the {001} facets. A red shift in the absorption edge and a strong absorption in the visible light range were observed due to the formation of Ti-O-B bonds and composite with g-C3N4, resulting in the narrowing of the band gap from 3.13 to 2.7 eV. The photocatalytic activity of the B-TiO2-001/gC(3)N(4) heterojunctions was evaluated by hydrogen evolution reaction under visible light irradiation (lambda > 400 nm). The B-TiO2-001/g-C3N4 heterojunctions exhibited the greatest photocatalytic activity, approximately 25-fold higher than that of TiO2-001. The enhancement of photocatalytic performance was ascribed to the efficiently reduced charge recombination, high absorption of visible light range and higher catalytic activity of {001} facets relative to the {101} facets. Copyright (C) 2016, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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