Fine crystals of potassium hexatitanate prepared by a sol-gel method for photocatalytic reduction of carbon dioxide with water

被引：3

作者：

Ishii, Tomoko ^{[1
]}

Takioka, Ryosuke ^{[1
]}

Yasumura, Hiroki ^{[2
]}

Yamamoto, Akira ^{[1
]}

Yoshida, Hisao ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Human & Environm Studies, Yoshida Nihonmatsu Cho,Sakyo Ku, Kyoto 6068501, Japan

[2] Kyoto Univ, Fac Integrated Human Studies, Yoshida Nihonmatsu Cho,Sakyo Ku, Kyoto 6068501, Japan

来源：

CATALYSIS TODAY | 2024年 / 429卷

基金：

日本学术振兴会;

关键词：

Potassium hexatitanate; Sol -gel method; Photocatalytic CO 2 reduction; Crystal size; Maximum cross-sectional area; CO2; AG; CONVERSION; GA2O3;

D O I：

10.1016/j.cattod.2023.114476

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Potassium hexatitanate photocatalysts with Ag cocatalyst (Ag/K2Ti6O13, Ag/KTO) can selectively exhibit the photocatalytic CO2 reduction to CO with water, and the preparation method and its conditions are known to much influence the photocatalytic activity. In the present study, to investigate the relationship between the structure and photocatalytic activities of crystal photocatalyst, the fine rod-like KTO samples with various crystal size are prepared by a sol-gel method. The required conditions were investigated to obtain pure KTO crystals without TiO2 impurity phase. The use of some additives for the preparation provided variously sized fine KTO crystals. By using obtained sub-micrometer sized pure KTO crystal samples, it is revealed that the KTO crystals consisting of larger crystals tend to give higher activity. This proposed that the crystals of larger maximum crosssectional area, which can receive many photons, exhibit higher photocatalytic activity for the CO2 reduction with water in the present conditions.

引用

页数：8