Acetone Formation from Photolysis of 2-Propanol on Anatase-TiO2(101)

被引：7
作者：
Geng, Zhen-hua [1 ,2 ]
Chen, Xiao [1 ,2 ]
Guo, Qing [1 ]
Dai, Dong-xu [1 ]
Yang, Xue-ming [1 ]
机构：
[1] Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
CHINESE JOURNAL OF CHEMICAL PHYSICS | 2017年 / 30卷 / 01期
基金：
中国国家自然科学基金;
关键词：
2-Propanol; Photochemistry; A-TiO2(101); Temperature-programmed desorption; METHYL RADICAL EJECTION; PHOTOCATALYTIC DEHYDROGENATION; OXYGEN VACANCIES; SURFACE SCIENCE; TIO2(110); TIO2; DEHYDRATION; METHANOL; PHOTOOXIDATION; TEMPERATURE;
D O I：
10.1063/1674-0068/30/cjcp1608170
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
Photocatalysis of 2-propanol on A-TiO2(101) has been investigated using a temperature programed desorption method with 266 nm laser light. A clear mechanism is proposed for photodissociation of 2-propanol on A-TiO2(101). Acetone product on five coordinate Ti4+ sites is formed in a stepwise manner in which the O-H dissociation proceeds first and then followed by secondary C-H dissociation of 2-propanol while H atoms are transferred to the adjacent bridge bond oxygen (BBO) sites. Low temperature water is formed in a thermally driven process via H-atom on BBO in exchange with isopropyl groups of molecule 2-propanol, while isopropyl radical desorbs at high temperature during the TPD process. The observation demonstrates the prospect of TiO2 as a photocatalyst for degradation of organics.
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页码：1 / 6
页数：6
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