Synthesis and photochemical properties of Cu2+ doped layered hydrogen titanate

被引：23

作者：

Yanagisawa, M ^{[1
]}

Uchida, S ^{[1
]}

Sato, T ^{[1
]}

机构：

[1] Tohoku Univ, Inst Chem React Sci, Sendai, Miyagi 9808577, Japan

来源：

INTERNATIONAL JOURNAL OF INORGANIC MATERIALS | 2000年 / 2卷 / 04期

关键词：

D O I：

10.1016/S1466-6049(00)00033-7

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Cu2+ doped layered hydrogen titanate was prepared by the calcination of K2CO3, TiO2 and CuO mixtures with the K2CO3:TiO2:CuO molar ratio of 1:2.5(1-x):2.5x at 1200 degrees C for 5 h followed by an ion-exchange reaction in 1 M HCl solution. The crystalline phase changed from monoclinic hydrogen tetratitanate to an orthorhombic lepidocrocite-type hydrogen titanate by increasing the amount of Cu2+ doped. Both compounds could be excited by visible light irradiation (lambda>400 nm) and were capable of hydrogen gas evolution from an aqueous methanol solution, where the photocatalytic activity of Cu2+ doped hydrogen tetratitanate was slightly greater than that of Cu2+ doped lepidocrocite-type hydrogen titanate. The photocatalytic activity of Cu2+ doped hydrogen tetratitanate was enhanced by constructing Pt and TiO2 pillars in the interlayer, and the incorporation of Pt in Cu2+ doped hydrogen tetratitanate enabled the cleavage of water into hydrogen and oxygen by irradiating visible light (lambda>400 nm) without a sacrificial hole acceptor. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：339 / 346

页数：8

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