A Quantitative Study on the Relationship of Specific Surface Area and Carrier Lifetime to Photocatalytic Activity of Anatase TiO2 Nanoparticles

被引:13
|
作者
Naniwa, Shimpei [1 ,2 ]
Kato, Kosaku [3 ]
Yamakata, Akira [3 ]
Yamamoto, Akira [1 ,4 ]
Yoshida, Hisao [1 ,4 ]
机构
[1] Kyoto Univ, Grad Sch Human & Environm Studies, Kyoto 6068501, Japan
[2] Kyoto Univ, Grad Sch Engn, Dept Mol Engn, Nishikyo Ku, Kyoto 6158510, Japan
[3] Okayama Univ, Grad Sch Nat Sci & Technol, Okayama 7008530, Japan
[4] Kyoto Univ, Elements Strategy Initiat Catalysts & Batteries, Kyoto 6158245, Japan
基金
日本学术振兴会;
关键词
photocatalysis; titanium dioxide (TiO2); direct coupling; transient absorptionspectroscopy; statistics; PARTICLE-SIZE; REDUCTION; ADSORPTION; DEPENDENCE; OXIDATION; DYNAMICS; BEHAVIOR; BENZENE; POWDERS; PHENOL;
D O I
10.1021/acscatal.3c04209
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
Heterogeneous photocatalysis is a promising technology for green and sustainable chemical processes. Understanding the relationship between the structure, properties, and activity of photocatalysts is a key to improving the design of photocatalysis. Although the specific surface area (S-BET) of photocatalysts and the lifetime of photoexcited carriers (tau) are known as determining factors of the photocatalytic activity, their quantitative relationship with the activity remains unclear. Here we show that the relationship of S-BET and tau with the photocatalytic activity can be given by a simple rate equation derived from a general kinetic model of photocatalysis. We examined activities of 21 anatase TiO2 photocatalysts with various S-BET and tau values in the direct homocoupling of benzene by means of time-resolved infrared absorption spectroscopy (TRIR) with microsecond time resolution. We found that the activity of most of the photocatalysts increased with the increase of S-BET from 9.0 to 265.9 m(2) g(-1), while some of them showed different activity despite their similar S-BET values. Carrier lifetimes (tau(1), tau(2), and tau(3)) estimated by triple-exponential fit of decay curves in TRIR were also different when the photocatalysts have similar S-BET values. The photocatalysts also showed different activity despite their similar tau values, suggesting that both S-BET and tau affect the photocatalytic activity. The activities of the photocatalysts were explained by a rate equation derived from a simple kinetic model that considers three primary processes in photocatalysis. In the equation, relations of S-BET and tau to the photocatalytic activity are equivalent in a mathematical sense, proposing the product of S-BET and tau (S-BET tau) as a determining factor of the photocatalytic activity. The present study demonstrates that a statistical approach based on a kinetic model is effective to understand a quantitative structure-property-activity relationship in photocatalysis.
引用
收藏
页码:15212 / 15218
页数:7
相关论文
共 50 条
  • [31] Hydrothermal synthesis of nanosized anatase TiO2: photocatalytic activity
    Jesty, Thomas
    Reddy, M. L. P.
    INTERNATIONAL JOURNAL OF NANOTECHNOLOGY, 2011, 8 (10-12) : 841 - 854
  • [32] Synthesis, characterization and study of photocatalytic activity of TiO2 nanoparticles
    Prasad, Shilpa
    Kumar, S. Saravana
    Shajudheen, V. P. Muhamed
    MATERIALS TODAY-PROCEEDINGS, 2020, 33 : 2286 - 2288
  • [33] Effect of gold doping on the photocatalytic activity of the anatase TiO2
    Lu, Han-Feng
    Zhou, Ying
    Xu, Bo-Qing
    Chen, Yin-Fei
    Liu, Hua-Zhang
    ACTA PHYSICO-CHIMICA SINICA, 2008, 24 (03) : 459 - 464
  • [34] Cu and Zr surface sites in the photocatalytic activity of TiO2 nanoparticles
    Pliekhova, O.
    Arcon, I.
    Pliekhov, O.
    Tusar, N. Novak
    Stangar, U. Lavrencic
    ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2017, 24 (14) : 12571 - 12581
  • [35] Cu and Zr surface sites in the photocatalytic activity of TiO2 nanoparticles
    O. Pliekhova
    I. Arčon
    O. Pliekhov
    N. Novak Tušar
    U. Lavrenčič Štangar
    Environmental Science and Pollution Research, 2017, 24 : 12571 - 12581
  • [36] Photocatalytic activity of TiO2 containing anatase nanoparticles and rutile nanoflower structure consisting of nanorods
    He, Zhiqiao
    Cai, Qiaolan
    Fang, Huiying
    Situ, Gaohua
    Qiu, Jianping
    Song, Shuang
    Chen, Jianmeng
    JOURNAL OF ENVIRONMENTAL SCIENCES, 2013, 25 (12) : 2460 - 2468
  • [37] High photocatalytic activity of mixed anatase-rutile phases on commercial TiO2 nanoparticles
    Siah, Wai Ruu
    Lintang, Hendrik O.
    Shamsuddin, Mustaffa
    Yuliati, Leny
    10TH JOINT CONFERENCE ON CHEMISTRY, 2016, 107
  • [38] Preparation and Photocatalytic Activity of Mixed Phase Anatase/rutile TiO2 Nanoparticles for Phenol Degradation
    Mohamed, Mohamad Azuwa
    Salleh, Wan Norharyati Wan
    Jaafar, Juhana
    Yusof, Norhaniza
    JURNAL TEKNOLOGI, 2014, 70 (02):
  • [39] Firmness and bandgap engineered anatase TiO2 nanoparticles for enhanced visible light photocatalytic activity
    Nagaraj, G.
    Senthil, R. A.
    Ravichandran, K.
    MATERIALS RESEARCH EXPRESS, 2019, 6 (09)
  • [40] Photocatalytic activity of TiO2 containing anatase nanoparticles and rutile nanoflower structure consisting of nanorods
    Zhiqiao He
    Qiaolan Cai
    Huiying Fang
    Gaohua Situ
    Jianping Qiu
    Shuang Song
    Jianmeng Chen
    Journal of Environmental Sciences, 2013, (12) : 2460 - 2468