Synthesis of pure phase Mg1.2Ti1.8O5 and MgTiO3 nanocrystals for photocatalytic hydrogen production  

作　　者：Ning Zhang Yang Qu Kai Pan Guofeng Wang Yadong Li 

机构地区：[1]Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China [2]Department of Chemistry, Tsinghua University, Beijing 100084, China

出　　处：《Nano Research》2016年第3期726-734,共9页纳米研究（英文版）

基　　金：This work was supported by the National Natural Sdence Foundation of China （Nos. 21171052, 21471050, 21501052 and 21473051）, the Program for New Century Excellent Talents in University of Ministry of Education of China （No. NCET-11-0959）, the China Postdoctoral Science Foundation （No. 2015M570304）, the Postdoctoral Science Foundation of Heilongjiang Province （No. LBH-Q11009）, Program for Innovative Research Team in University （No. IRT-1237）, Heilongjiang Province Natural Science Foundation of Key Projects （No. ZD201301）, Heilongjiang Province Natural Science Foundation Youth Fund （No. QC2015010） and Harbin Technological Innovation Talent of Special Funds （No. RC2013QN017028）.

摘　　要：Synthesis of pure phase Mg1.2Ti1.8O5 and MgTiO3 nanocrystals has proven to be challenging. Here, pure phase Mg1.2Ti1.8O5 and MgTiO3 nanocrystals were prepared. Furthermore, a new magnesium titanate, Mg1.2Ti1.8O5, was synthesized via a solution-based route for the first time. As hydrogen evolution photocatalysts, both pure phase Mg1.2TiLsO5 and MgTiO3 nanocrystals exhibit excellent hydrogen production efficiency. In comparison with pure MgTiO3 nanocrystals, the asprepared Mg1.2Ti1.8O5 nanocrystals exhibited four times as much photocatalytic hydrogen production activity, up to 40 μmol.h-1 Photoelectrochemical analysis, including linear sweep voltammetry, transient photocurrent measurement, electrochemical impedance spectroscopy, and construction of Mott-Schottky plots, demonstrated that the enhanced photocatalytic activity was attributed to the large surface area, fast photoelectron transfer, higher carrier density, and efficient charge separation of the Mg1.2Ti1.8O5 nanocrystals.Synthesis of pure phase Mg1.2Ti1.8O5 and MgTiO3 nanocrystals has proven to be challenging. Here, pure phase Mg1.2Ti1.8O5 and MgTiO3 nanocrystals were prepared. Furthermore, a new magnesium titanate, Mg1.2Ti1.8O5, was synthesized via a solution-based route for the first time. As hydrogen evolution photocatalysts, both pure phase Mg1.2TiLsO5 and MgTiO3 nanocrystals exhibit excellent hydrogen production efficiency. In comparison with pure MgTiO3 nanocrystals, the asprepared Mg1.2Ti1.8O5 nanocrystals exhibited four times as much photocatalytic hydrogen production activity, up to 40 μmol.h-1 Photoelectrochemical analysis, including linear sweep voltammetry, transient photocurrent measurement, electrochemical impedance spectroscopy, and construction of Mott-Schottky plots, demonstrated that the enhanced photocatalytic activity was attributed to the large surface area, fast photoelectron transfer, higher carrier density, and efficient charge separation of the Mg1.2Ti1.8O5 nanocrystals.

关 键 词：Mg1.2Ti1.8O5 MGTIO3 NANOCRYSTALS photocatalytic hydrogenproduction 

分 类 号：TQ174.756[化学工程—陶瓷工业] O643.36[化学工程—硅酸盐工业]