Characterization of titanium-boron binary oxides and their photocatalytic activity for stoichiometric decomposition of water
Characterization of titanium-boron binary oxides and their photocatalytic activity for stoichiometric decomposition of water
复制标题
DOI：
10.1016/s0920-5861(98)00252-1
复制
发表时间：
1998-10
期刊：
影响因子：
5.3
通讯作者：
S. Moon;H. Mametsuka;E. Suzuki;Y. Nakahara
中科院分区：
文献类型：
--
作者：
S. Moon;H. Mametsuka;E. Suzuki;Y. Nakahara
采用溶胶-凝胶法制备了钛硼二元氧化物，并将其用作分解水的光催化剂。 Ti/B二元氧化物中钛氧化物的结构在O2中煅烧前为非晶态，在O2中煅烧后为晶体，而硼氧化物则保持其非晶态。随着煅烧温度的升高，二氧化钛的晶体结构由锐钛矿相转变为金红石相。负载 Pt 的 Ti/B 光催化剂在水悬浮体系中按化学计量分解水。随着煅烧温度的升高，它们的光催化活性显着降低，这表明Ti/B二元氧化物的光催化活性强烈依赖于Ti/B二元氧化物中钛氧化物的晶相。当在负载 Pt 的 Ti/B 二元氧化物悬浮液中添加 Na2CO3 时，水分解反应获得了显着的产率。
A titanium-boron binary oxide has been prepared by sol–gel method and used as a photocatalyst for the decomposition of water. The structure of titanium oxide species in the Ti/B binary oxide was amorphous before and crystal after calcination in O2, while the boron oxide species maintained its amorphous state. With increasing calcination temperature, the crystalline structure of titanium oxides changed from an anatase phase to a rutile phase. Pt-loaded Ti/B photocatalysts decomposed water stoichiometrically in aqueous suspension system. Their photocatalytic activity decreased markedly with increase in the calcination temperature, indicating that the photocatalytic activity of the Ti/B binary oxide was strongly dependent on the crystal phase of the titanium oxide in the Ti/B binary oxide. A remarkable yield in the reaction of water decomposition was obtained when Na2CO3was added in the Pt-loaded Ti/B binary oxide suspension.