Abstract
The role of dissolved oxygen, and of active species generated by photo-induced reactions with oxygen, in the photocatalytic degradation of phenol was investigated using polymer [poly-(fluorene-co-thiophene) with thiophene content of 30%, so-called PFT30] sensitized TiO2 (PFT30/TiO2) under visible light irradiation. The photoluminescent (PL) quantum yield of PFT30/TiO2 was about 30% of that of PFT30/Al(2)O(3), proving that electron transfer took place between the polymer and TiO2. The result that photocatalytic degradation of phenol was almost stopped when the solution was saturated with N(2) proved the importance of O(2). Addition of NaN(3), an effective quencher of singlet oxygen ((1)O(2)), caused about a 40% decrease in the phenol degradation ratio. Addition of alcohols caused about a 60% decrease in the phenol photodegradation ratio, indicating that the hydroxyl radicals (OH), whose presence was confirmed by electron spin resonance (ESR) spectroscopy, was the predominant active species in aqueous solution. In anhydrous solution, singlet oxygen ((1)O(2)) was the predominant species. These results indicate that oxygen plays a very important role in the photocatalytic degradation of phenol.
Citations
Apr 26, 2011·The Journal of Chemical Physics·Hiroaki TakahashiGoro Mizutani
May 9, 2014·Journal of Hazardous Materials·Yeoung-Sheng WangJao-Jia Horng
Mar 19, 2013·Journal of Hazardous Materials·Peng GaoWunjern Ng
Jan 8, 2013·Journal of Hazardous Materials·Tan T VuGregorio Marbán
Mar 1, 2012·Water Research·Rongliang QiuYa Xiong
Apr 29, 2011·Journal of Hazardous Materials·Lili ZhangXuexiang Hu
Nov 9, 2015·Journal of Hazardous Materials·Jiadong XiaoFeng Duan
Mar 15, 2016·Environmental Science and Pollution Research International·Sajad RahimiAbbas Rezaee
Apr 15, 2016·Environmental Science and Pollution Research International·Rusul Khaleel IbrahimShaliza Ibrahim
Oct 8, 2014·Chemosphere·Xiaoyan GuoTingting Wei
Aug 26, 2014·Environmental Technology·J RashidJ N Kuhn
Feb 9, 2012·Science Progress·Christopher J Rhodes
Jul 8, 2017·Beilstein Journal of Nanotechnology·Florian DonatRaphaël Schneider
Jul 26, 2017·Scientific Reports·Ai-Na MengZhi-Yuan Gu
Jun 2, 2011·Nanoscale·Peng ZhangYichun Liu
Nov 15, 2013·Chemical Communications : Chem Comm·Ruifeng ChongCan Li
Jul 28, 2017·Environmental Science and Pollution Research International·Tiecheng WangLingyan Zhu
Jan 6, 2017·Nanotechnology·Erum PervaizMinghui Yang
Jun 27, 2012·Chemistry, an Asian Journal·Shu Chin LeeLeny Yuliati
Dec 20, 2017·Carbohydrate Polymers·Xiaomin ZhangJin Zhu
May 27, 2017·Environmental Pollution·Liting JuNengwu Zhu
Aug 5, 2017·Chemical Reviews·Yoshio Nosaka, Atsuko Y Nosaka
Dec 15, 2018··Chandra S. RahendaputriEndah M. M. Putri