Kinetics and mechanism of thymine degradation by TiO2 photocatalysis

被引:8
|
作者
Elsellami, L. [1 ,2 ,3 ]
Hafidhi, N. [2 ]
Dappozze, F. [1 ]
Houas, A. [2 ]
Guillard, C. [1 ]
机构
[1] Univ Lyon 1, IRCELYON, CNRS UMR 5256, F-69626 Villeurbanne, France
[2] Univ Gabes, Res Unit Catalysis & Mat Environm & Proc URCMEP U, Bettahar Erriadh Gabes 6072, Tunisia
[3] Univ Gabes, Higher Inst Appl Sci & Technol Gabes, Bettahar Erriadh Gabes 6072, Tunisia
关键词
Titania; Photocatalysis; Thymine; Photomineralization; Frontier electron density; TITANIUM-DIOXIDE; AQUEOUS SUSPENSIONS; PH; PHOTODEGRADATION; ADSORPTION; GUANINE; URACIL; OXIDATION; BASES; DNA;
D O I
10.1016/S1872-2067(15)60967-6
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The advanced oxidation processes were examined toward the degradation of thymine (C5H6N2O2), a type of nucleic acid from the pyrimidine family. As observed, the photodegradation of thymine over TiO2 photocatalyst was rapid and significant in aqueous solution under UV irradiation. Different parameters were studied, including the adsorption of thymine onto TiO2 photocatalyst, the kinetics of degradation, and the effect of pH on the photocatalytic properties of thymine degradation. Additionally, the mineralization of the products obtained upon thymine photodegradation was studied. The disappearance and mineralization rates of thymine during the photocatalytic process were also compared and discussed. The mineralization of nitrogen was also investigated, and the identification of the intermediate products was established. Finally, electronic density calculations were used to propose possible chemical pathways for the photodegradation of thymine over TiO2 photocatalyst under UV irradiation. (C) 2015, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:1818 / 1824
页数:7
相关论文
共 50 条
  • [41] Effect of sodium persulfate as electron acceptor on antipyrine degradation by solar TiO2 or TiO2/rGO photocatalysis
    Monteagudo, J. M.
    Duran, A.
    San Martin, I
    Carrillo, P.
    CHEMICAL ENGINEERING JOURNAL, 2019, 364 : 257 - 268
  • [42] X-ray induced photocatalysis on TiO2 and TiO2 nanotubes: Degradation of organics and drug release
    Schmidt-Stein, Felix
    Hahn, Robert
    Gnichwitz, Jan-Frederik
    Song, Yan Yan
    Shrestha, Nabeen K.
    Hirsch, Andreas
    Schmuki, Patrik
    ELECTROCHEMISTRY COMMUNICATIONS, 2009, 11 (11) : 2077 - 2080
  • [43] Structural characteristics of zeolite/TiO2 composite and photocatalysis of toluene degradation
    Ming Caibing
    Wu Pingxiao
    ACTA GEOCHIMICA, 2005, 24 (04) : 370 - 376
  • [44] Degradation of Organoarsenicals by Heterogeneous Photocatalysis using ZnO, TiO2 and UVA
    Miranda, C.
    Santander, P.
    Matschullat, J.
    Daus, B.
    Yanez, J.
    Mansilla, H. D.
    JOURNAL OF ADVANCED OXIDATION TECHNOLOGIES, 2016, 19 (02) : 276 - 283
  • [45] Treatment heterogeneous photocatalysis; Factors influencing the photocatalytic degradation by TiO2
    Yasmina, Mokhbi
    Mourad, Korichi
    Mohammed, Sidrouhou Hadj
    Khaoula, Chaouche
    TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY (TMREES14 - EUMISD), 2014, 50 : 559 - 566
  • [46] Analysis of TiO2 photocatalysis in a pulsed discharge system for phenol degradation
    Wang, Huijuan
    Chu, Jinyu
    Ou, Hongxiang
    Zhao, Rujin
    Han, Jiangang
    JOURNAL OF ELECTROSTATICS, 2009, 67 (06) : 886 - 889
  • [47] Thiobencarb Degradation by TiO2 Photocatalysis: Parameter and Reaction Pathway Investigations
    Lai, Hsiao-Fang
    Chen, Chiing-Chang
    Wu, Ren-Jang
    Lu, Chung-Shin
    JOURNAL OF THE CHINESE CHEMICAL SOCIETY, 2012, 59 (01) : 87 - 97
  • [48] Cytarabine degradation by simulated solar assisted photocatalysis using TiO2
    Koltsakidou, A.
    Antonopoulou, M.
    Evgenidou, E.
    Konstantinou, I.
    Lambropoulou, D. A.
    CHEMICAL ENGINEERING JOURNAL, 2017, 316 : 823 - 831
  • [49] THE DEGRADATION OF PHENOL IN WATER SOLUTION BY TiO2 PHOTOCATALYSIS IN A HELICAL REACTOR
    Laoufi, N. A.
    Tassalit, D.
    Bentahar, F.
    GLOBAL NEST JOURNAL, 2008, 10 (03): : 404 - 418
  • [50] Effect of the Ce-doped TiO2 on the Photocatalysis Degradation of MB
    Fu, Xiaoye
    Liang, Xiuhong
    CHINA FUNCTIONAL MATERIALS TECHNOLOGY AND INDUSTRY FORUM, 2013, 320 : 220 - 225