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

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 mic...

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Bibliographic Details
Published inNano research Vol. 10; no. 1; pp. 295 - 304
Main Authors Meng, Ling, Ren, Zhiyu, Zhou, Wei, Qu, Yang, Wang, Guofeng
Format Journal Article
LanguageEnglish
Published Beijing Tsinghua University Press 2017
Springer Nature B.V
Subjects
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Catalysis
Catalysts
Chemistry and Materials Science
Condensed Matter Physics
Electrical junctions
Heterojunctions
Hydrogen
Hydrogen production
Magnesium
Magnesium titanates
Materials Science
Nanotechnology
Photocatalysis
Photoelectric effect
Photoelectric emission
Quantum efficiency
Reactors
Research Article
Titanium dioxide
Transmission electron microscopy
X ray powder diffraction
MgTi
TiO
MgTiO
heterogeneous belt-junctions
O
photocatalytic hydrogen production
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Summary: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 MgTiOg/MgTi2OJ TiO2 heterojunctions exhibited a very high photocatalytic hydrogen production activity （356.1 mol·g0.1mgcat·h^-1） and an apparent quantum efficiency （50.69% at 365 nm） that is about twice of that of bare TiO2 nanobelts （189.4mol·g0.1mgcat·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.
Bibliography:MgTiO3/MgTi2O5/TiO2,heterogeneousbelt-junctions,photocatalytic hydrogenproduction
11-5974/O4
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 MgTiOg/MgTi2OJ TiO2 heterojunctions exhibited a very high photocatalytic hydrogen production activity （356.1 mol·g0.1mgcat·h^-1） and an apparent quantum efficiency （50.69% at 365 nm） that is about twice of that of bare TiO2 nanobelts （189.4mol·g0.1mgcat·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.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-016-1292-6