Photocatalytic Reduction of CO2 by TiO2 Nanotubes

被引：6

作者：

Chang, H-H ^{[1
]}

Wei, L-W ^{[1
]}

Huang, H-L ^{[2
]}

Chang, H-Y ^{[1
]}

Wang, H. Paul ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Environm Engn, Tainan 70101, Taiwan

[2] Natl United Univ, Dept Safety Hlth & Environm Engn, Miaoli 36003, Taiwan

来源：

NANO | 2022年 / 17卷 / 04期

关键词：

In situ FTIR; photocatalytic reduction of CO2; TiO2; nanotubes; CATALYSTS; OXIDE;

D O I：

10.1142/S1793292022500321

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Continuously increasing atmospheric concentrations of CO2 have given rise to great concerns about climate change. Photocatalytic reduction of CO2 to chemicals by solar energy is considered a green and sustainable process. Interactions between CO2 molecules and photocatalysts surfaces are the key factors that affect photocatalytic reduction efficiency. Thus, a better understanding of their reactive species on the TiO2 nanotube (TNT) surfaces by in situ FTIR spectroscopy was studied in the present work. The FTIR absorbance features at 1303cm(-1) and 1393cm(-1) were associated with carbonate species, e.g., bidentate carbonate on the TNT. Complete desorption of CO2 from the TNT occurred at T>418K. The carboxylate species that were adsorbed on the TNT may conduct the surface reactions enhanced by UV-Vis light to yield low carbon chemicals.

引用

页数：7

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