Volume 30 Issue 1
Feb.  2017
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Zhen-hua Geng, Xiao Chen, Qing Guo, Dong-xu Dai, Xue-ming Yang. Acetone Formation from Photolysis of 2-Propanol on Anatase-TiO2(101)[J]. Chinese Journal of Chemical Physics , 2017, 30(1): 1-6. doi: 10.1063/1674-0068/30/cjcp1608170
Citation: Zhen-hua Geng, Xiao Chen, Qing Guo, Dong-xu Dai, Xue-ming Yang. Acetone Formation from Photolysis of 2-Propanol on Anatase-TiO2(101)[J]. Chinese Journal of Chemical Physics , 2017, 30(1): 1-6. doi: 10.1063/1674-0068/30/cjcp1608170

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

doi: 10.1063/1674-0068/30/cjcp1608170
  • Received Date: 2016-08-30
  • Rev Recd Date: 2016-10-06
  • 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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