Photocatalytic chemistry of methanol on rutile TiO2(011)-(2 x 1)

被引:15
作者
Wang, Zhiqiang [1 ]
Hao, Qunqing [1 ]
Mao, Xinchun [2 ]
Zhou, Chuanyao [1 ]
Dai, Dongxu [1 ]
Yang, Xueming [1 ]
机构
[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, 457 Zhongshan Rd, Dalian 116023, Liaoning, Peoples R China
[2] China Acad Engn Phys, Inst Mat, Ctr Interface Dynam Sustainabil, Chengdu 610200, Sichuan, Peoples R China
基金
中国国家自然科学基金;
关键词
TIO2; THIN-FILMS; SURFACE-STRUCTURE; METHYL FORMATE; PHOTON ENERGY; TIO2(110); FORMALDEHYDE; DISSOCIATION; HYDROGEN; ANATASE; POLYCRYSTALLINE;
D O I
10.1039/c6cp00556j
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
Photocatalytic chemistry of methanol on the reconstructed rutile TiO2(011)-(2 x 1) surface upon 266 nm and 400 nm light excitation has been investigated quantitatively using the post-irradiation temperature-programmed desorption (TPD) method. Photochemical products such as formaldehyde, methyl formate and water, which result from the recombination of surface bridging hydroxyls through the abstraction of lattice oxygen atoms, have been identified under both 266 nm and 400 nm light irradiation. However, ethylene is detected only under 266 nm light irradiation. Through an analogy experiment, ethylene production is attributed to the photochemistry and the following thermochemistry of formaldehyde. The absence of the ethylene signal under 400 nm light is consistent with the significantly lower conversion at this wavelength compared with 266 nm. The photocatalytic reaction rate of methanol is also wavelength dependent. Possible reasons for the photon energy dependent phenomena have been discussed. This work not only provides a detailed characterization of the photochemistry of methanol on the rutile TiO2(011)-(2 x 1) surface, but also indicates the importance of photon energy in the photochemistry on TiO2 surfaces.
引用
收藏
页码:10224 / 10231
页数:8
相关论文
共 47 条
[1]   Semiconductor-based Photocatalytic Hydrogen Generation [J].
Chen, Xiaobo ;
Shen, Shaohua ;
Guo, Liejin ;
Mao, Samuel S. .
CHEMICAL REVIEWS, 2010, 110 (11) :6503-6570
[2]  
Dharma J., 2009, Simple method of measuring the band gap energy value of TiO2 in the powder form using a UV/Vis/NIR spectrometer
[3]   The surface science of titanium dioxide [J].
Diebold, U .
SURFACE SCIENCE REPORTS, 2003, 48 (5-8) :53-229
[4]   In Situ Studies on the Dissociation and Photocatalytic Reactions of CH3OH on TiO2 Thin Film by Sum Frequency Generation Vibrational Spectroscopy [J].
Feng, Ran-ran ;
Liu, An-an ;
Liu, Shuo ;
Shi, Jiaojian ;
Zhang, Ruidan ;
Ren, Zefeng .
JOURNAL OF PHYSICAL CHEMISTRY C, 2015, 119 (18) :9798-9804
[5]   TiO2 photocatalysis and related surface phenomena [J].
Fujishima, Akira ;
Zhang, Xintong ;
Tryk, Donald A. .
SURFACE SCIENCE REPORTS, 2008, 63 (12) :515-582
[6]   Harnessing excess photon energy in photoinduced surface electron transfer between salicylate and illuminated titanium dioxide nanoparticles [J].
Grela, MA ;
Brusa, MA ;
Colussi, AJ .
JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (51) :10986-10989
[7]   Elementary photocatalytic chemistry on TiO2 surfaces [J].
Guo, Qing ;
Zhou, Chuanyao ;
Ma, Zhibo ;
Ren, Zefeng ;
Fan, Hongjun ;
Yang, Xueming .
CHEMICAL SOCIETY REVIEWS, 2016, 45 (13) :3701-3730
[8]   Methyl Formate Production on TiO2(110), Initiated by Methanol Photocatalysis at 400 nm [J].
Guo, Qing ;
Xu, Chenbiao ;
Yang, Wenshao ;
Ren, Zefeng ;
Ma, Zhibo ;
Dai, Dongxu ;
Minton, Timothy K. ;
Yang, Xueming .
JOURNAL OF PHYSICAL CHEMISTRY C, 2013, 117 (10) :5293-5300
[9]   Stepwise Photocatalytic Dissociation of Methanol and Water on TiO2(110) [J].
Guo, Qing ;
Xu, Chenbiao ;
Ren, Zefeng ;
Yang, Wenshao ;
Ma, Zhibo ;
Dai, Dongxu ;
Fan, Hongjun ;
Minton, Timothy K. ;
Yang, Xueming .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2012, 134 (32) :13366-13373
[10]   The chemistry of methanol on the surface:: the TiO2 (110) influence of vacancies and coadsorbed species [J].
Henderson, MA ;
Otero-Tapia, S ;
Castro, ME .
FARADAY DISCUSSIONS, 1999, 114 :313-329