Photocatalytic conversion of CO2 in water over Ag-modified La2Ti2O7

被引：132
作者：
Wang, Zheng [1 ]
Teramura, Kentaro [1 ,2 ,3 ]
Hosokawa, Saburo [1 ,2 ]
Tanaka, Tsunehiro [1 ,2 ]
机构：
[1] Kyoto Univ, Grad Sch Engn, Dept Mol Engn, Kyoto 6158510, Japan
[2] Kyoto Univ, Elements Strategy Initiat Catalysts & Batteries E, Nishikyo Ku, Kyoto 6158245, Japan
[3] Japan Sci & Technol Agcy JST, Precursory Res Embryon Sci & Technol PRESTO, Kawaguchi, Saitama 3320012, Japan
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2015年 / 163卷
基金：
日本科学技术振兴机构;
关键词：
Conversion of CO2 to CO; La2Ti2O7; photocatalyst; Evolution of O-2; Isotope labeling; CARBON-DIOXIDE; REDUCTION; H-2; PHOTOREDUCTION;
D O I：
10.1016/j.apcatb.2014.07.052
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We have found that Ag-modified La2Ti2O7 with a layered perovskite structure exhibits activity for the photocatalytic conversion of CO2 to CO in pure water. The evolution of O-2 proves that H2O works as an electron donor for the photocatalytic conversion of CO2. CO was generated as the main product, and CO, H-2, and O-2 were produced in stoichiometric amounts. The crystallite size of La2Ti2O7 increased and the surface area decreased with increasing calcination temperature and time. Maximization of the photocatalytic activity of La2Ti2O7 was accomplished by making a trade-off between the crystallite size and surface area. In addition, the loading amount and modification method of the Ag cocatalyst also influenced the amount of CO evolved. An isotope labeling experiment using (CO2)-C-13 confirmed that the origin of evolved CO was not the residual carbon species on the La2Ti2O7 surface, but was rather the CO2 gas that was introduced during the experimental process. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：241 / 247
页数：7
相关论文
共 21 条
  • [1] Photocatalytic activity of R3MO7 and R2Ti2O7 (R = Y, Gd, La;: M = Nb, Ta) for water splitting into H2 and O2
    Abe, R
    Higashi, M
    Sayama, K
    Abe, Y
    Sugihara, H
    [J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (05) : 2219 - 2226
  • [2] Ag-Nanoparticle-Decorated SiO2 Nanospheres Exhibiting Remarkable Plasmon-Mediated Photocatalytic Properties
    Chen, Kuang-Hsiu
    Pu, Ying-Chih
    Chang, Kao-Der
    Liang, Yi-Fan
    Liu, Chia-Ming
    Yeh, Jien-Wei
    Shih, Han-C.
    Hsu, Yung-Jung
    [J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2012, 116 (35) : 19039 - 19045
  • [3] Effect of surface structures on photocatalytic CO2 reduction using quantized CdS nanocrystallites
    Fujiwara, H
    Hosokawa, H
    Murakoshi, K
    Wada, Y
    Yanagida, S
    Okada, T
    Kobayashi, H
    [J]. JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (41): : 8270 - 8278
  • [4] Earth's energy imbalance: Confirmation and implications
    Hansen, J
    Nazarenko, L
    Ruedy, R
    Sato, M
    Willis, J
    Del Genio, A
    Koch, D
    Lacis, A
    Lo, K
    Menon, S
    Novakov, T
    Perlwitz, J
    Russell, G
    Schmidt, GA
    Tausnev, N
    [J]. SCIENCE, 2005, 308 (5727) : 1431 - 1435
  • [5] PRODUCTION OF CO AND CH4 IN ELECTROCHEMICAL REDUCTION OF CO2 AT METAL-ELECTRODES IN AQUEOUS HYDROGENCARBONATE SOLUTION
    HORI, Y
    KIKUCHI, K
    SUZUKI, S
    [J]. CHEMISTRY LETTERS, 1985, (11) : 1695 - 1698
  • [6] Photocatalytic Reduction of Carbon Dioxide over Ag Cocatalyst-Loaded ALa4Ti4O15 (A = Ca, Sr, and Ba) Using Water as a Reducing Reagent
    Iizuka, Kosuke
    Wato, Tomoaki
    Miseki, Yugo
    Saito, Kenji
    Kudo, Aldhiko
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2011, 133 (51) : 20863 - 20868
  • [7] PHOTOELECTROCATALYTIC REDUCTION OF CARBON-DIOXIDE IN AQUEOUS SUSPENSIONS OF SEMICONDUCTOR POWDERS
    INOUE, T
    FUJISHIMA, A
    KONISHI, S
    HONDA, K
    [J]. NATURE, 1979, 277 (5698) : 637 - 638
  • [8] Photocatalytic water splitting over La2Ti2O7 synthesized by the polymerizable complex method
    Kim, HG
    Hwang, DW
    Bae, SW
    Jung, JH
    Lee, JS
    [J]. CATALYSIS LETTERS, 2003, 91 (3-4) : 193 - 198
  • [9] Highly efficient overall water splitting through optimization of preparation and operation conditions of layered perovskite photocatalysts
    Kim, J
    Hwang, DW
    Kim, HG
    Bae, SW
    Lee, JS
    Li, W
    Oh, SH
    [J]. TOPICS IN CATALYSIS, 2005, 35 (3-4) : 295 - 303
  • [10] Status and perspectives of CO2 conversion into fuels and chemicals by catalytic, photocatalytic and electrocatalytic processes
    Kondratenko, Evgenii V.
    Mul, Guido
    Baltrusaitis, Jonas
    Larrazabal, Gaston O.
    Perez-Ramirez, Javier
    [J]. ENERGY & ENVIRONMENTAL SCIENCE, 2013, 6 (11) : 3112 - 3135
123