摘要
Solar energy can convert into clean energy which can make use by human.Photocatalytic decomposition of water to generate hydrogen will be beneficial to solve the problem of the shortage for energy supply.~(1-3) So,people are actively exploring and synthesis of new nano/micro materials for photocatalytic reaction.Then,the enhanced photocatalytic activity could be attributed to the large surface area,fast photo-electrons transfer,higher carrier density and efficient charge separation which were proven by photoelectrochemical analysis such as liner sweep voltage,electrochemical impedance spectroscopy and Mott-Schottky plot.~(4-6) In here,we successfully synthesized pure phase Mg_(1.2)Ti_(1.8)O_5 and MgTiO_3 nanocrystals,using a hydrothermal method and a subsequent calcinaion in air.In comparison with pure MgTiO_3 nanocrystals,the resultant Mg_(1.2)Ti_(1.8)O_5 materials show an good photoresponse under UV light irradiation,exhibiting a high photocatalytic hydrogen evolution rate of 40 μ mol h~(-1),which is almost four times as high as that of MgTiO_3.
Solar energy can convert into clean energy which can make use by human.Photocatalytic decomposition of water to generate hydrogen will be beneficial to solve the problem of the shortage for energy supply.~(1-3) So,people are actively exploring and synthesis of new nano/micro materials for photocatalytic reaction.Then,the enhanced photocatalytic activity could be attributed to the large surface area,fast photo-electrons transfer,higher carrier density and efficient charge separation which were proven by photoelectrochemical analysis such as liner sweep voltage,electrochemical impedance spectroscopy and Mott-Schottky plot.~(4-6) In here,we successfully synthesized pure phase Mg_(1.2)Ti_(1.8)O_5 and MgTiO_3 nanocrystals,using a hydrothermal method and a subsequent calcinaion in air.In comparison with pure MgTiO_3 nanocrystals,the resultant Mg_(1.2)Ti_(1.8)O_5 materials show an good photoresponse under UV light irradiation,exhibiting a high photocatalytic hydrogen evolution rate of 40 μ mol h~(-1),which is almost four times as high as that of MgTiO_3.
引文
[1]Lv,X.;Fu,W.;Chang,H.;Zhang,H.;Cheng,J.;Zhang,G.;Song,Y.;Hu,C.;Li.J.J.Mater.Chem.2012,22:1539.
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