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Research Article

MgTiO3/MgTi2O5/TiO2 heterogeneous belt-junctions with high photocatalytic hydrogen production activity

Ling Meng, Zhiyu Ren, Wei Zhou, Yang Qu(), Guofeng Wang()
Key Laboratory of Functional Inorganic Material Chemistry,Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University,Harbin,150080,China;
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Abstract

An effective photocatalytic hydrogen production catalyst comprising MgTiO3/ MgTi2O5/TiO2 heterogeneous belt-junctions was prepared using magnesium ions by a thermally driven doping method. The tri-phase heterogeneous junction was confirmed by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and high-resolution TEM (HRTEM). The as-prepared MgTiO3/MgTi2O5/ TiO2 heterojunctions exhibited a very high photocatalytic hydrogen production activity (356.1 mol∙g0.1gcat∙h−1) and an apparent quantum efficiency (50.69% at 365 nm) that is about twice of that of bare TiO2 nanobelts (189.4 mol∙g0.1gcat∙h−1). Linear sweep voltage and transient photocurrent characterization as well as analysis of the electrochemical impedance spectra and Mott-Schottky plots revealed that the high photocatalytic performance is caused by the one-dimensional structure, which imparts excellent charge transportation characteristic, and the MgTiO3/MgTi2O5/TiO2 tri-phase heterojunction, which effectively drives the charge separation through the inherent electric field. This titanate-based tri-phase heterogeneous junction photocatalyst further enriches the catalyst system for photocatalytic hydrogen production.

Keywords

MgTiO3/MgTi2O5/TiO2heterogeneous belt-junctionsphotocatalytic hydrogenproduction

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Nano Research
Volume 10 Issue 1,
January 2017
Pages 295-304
DOI: 10.1007/s12274-016-1292-6
Cite this article:
Meng L, Ren Z, Zhou W, et al. MgTiO3/MgTi2O5/TiO2 heterogeneous belt-junctions with high photocatalytic hydrogen production activity. Nano Research, 2017, 10(1): 295-304. https://doi.org/10.1007/s12274-016-1292-6
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