OALib Journal期刊
连续流动化学发光法在线定量检测二氧化钛光催化产生的O2·-和H2O2及其生成动力学研究
DOI: 10.6023/A15010036
Keywords: 连续流动化学发光 ,TiO2光催化 ,O2·- ,H2O2 ,在线定量检测 ,动力学研究
Abstract:
O2·-和H2O2是TiO2光催化反应过程中产生的重要活性氧物种.本文使用鲁米诺作为化学发光探针,针对两者寿命不同,建立了连续流动化学发光在线定量检测方法.对于O2·-,由于寿命短,标准品不易得到,将光照后TiO2样品10s内与鲁米诺混合产生化学发光,根据鲁米诺和O2·-化学计量关系,将该发光强度对应的鲁米诺浓度转换成O2·-的浓度,实现间接定量;对于H2O2,将光照后的TiO2溶液于黑暗处30min后进行定量.该方法测得TiO2光催化产生O2·-和H2O2的浓度范围分别为7.5～30nmol/L和0.60～3.0μmol/L,检测限分别为1.95nmol/L和18.0nmol/L.O2·-和H2O2的生成动力学研究发现,两者的生成均符合指数衰减函数增长,通过拟合计算,其生成速率常数(kf)分别为0.0653nmol·s-1和15.0nmol·s-1,表明在TiO2光催化反应中H2O2的生成速率高于O2·-.
References
[1] Kieber, R. J.; Peake, B.; Willey, J. D.; Jacobs, B. Atmos. Environ. 2001, 35, 6041. [2] Faust, B. C. Environ. Sci. Technol. 1994, 28, 216A. [3] Aguirre, J.; Ríos-Momberg, M.; Hewitt, D.; Hansberg, W. Trends in Microbiology 2005, 13, 111. [4] White, E. M.; Vaughan, P. P.; Zepp, R. G. Aquat. Sci. 2003, 65, 402. [5] Vaughan, P. P.; Blough, N. V. Environ. Sci. Technol. 1998, 32, 2947. [6] Yin, Y.; Liu, J.; Jiang, G. ACS Nano 2012, 6, 7910. [7] Li, Y.; Zhang, W.; Niu, J.; Chen, Y. ACS Nano 2012, 6, 5164. [8] Rose, A. L.; Waite, T. D. Environ. Sci. Technol. 2003, 37, 4877. [9] Wagner, J. R.; Cadet, J. Acc. Chem. Res. 2010, 43, 564. [10] Li, T. Y.; Yi, Y.; Xu, H. P. Acta Chim. Sinica 2014, 72, 1079. (李天予, 易宇, 许华平, 化学学报, 2014, 72, 1079.) [11] Hoffmann, M. R.; Martin, S. T.; Choi, W.; Bahnemann, D. W. Chem. Rev. 1995, 95, 69. [12] Attwood, A. L.; Murphy, D. M.; Edwards, J. L.; Egerton, T. A.; Harrison, R. W. Res. Chem. Intermed. 2003, 29, 449. [13] Aschauer, U.; Chen, J.; Selloni, A. Phys. Chem. Chem. Phys.2010, 12, 12956. [14] Turchi, C. S.; Ollis, D. F. J. Catal. 1990, 122, 178. [15] Li, A. C.; Li, J. F.; Liu, Y. L.; Zhang, J. P.; Zhao, L. P.; Lu, Y. H. Acta Chim. Sinica 2013, 71, 815. (李爱昌, 李健飞, 刘亚录, 张建平, 赵丽平, 卢艳红, 化学学报, 2013, 71, 815.) [16] Linsebigler, A. L.; Lu, G.; Yates, J. T. Chem. Rev. 1995, 95, 735. [17] Chen, C.; Lei, P.; Ji, H.; Ma, W.; Zhao, J.; Hidaka, H.; Serpone, N. Environ. Sci. Technol. 2004, 38, 329. [18] Choi, W.; Yeo, J.; Ryu, J.; Tachikawa, T.; Majima, T. Environ. Sci. Technol. 2010, 44, 9099. [19] Li, Y.; Wen, B.; Yu, C.; Chen, C.; Ji, H.; Ma, W.; Zhao, J. Chem.-Eur. J. 2012, 18, 2030. [20] Zhang, J.; Nosaka, Y. J. Phys. Chem. C 2013, 117, 1383. [21] Teranishi, M.; Naya, S.-i.; Tada, H. J. Am. Chem. Soc. 2010, 132, 7850. [22] Kormann, C.; Bahnemann, D. W.; Hoffmann, M. R. Environ. Sci. Technol. 1988, 22, 798. [23] Nosaka, Y.; Yamashita, Y.; Fukuyama, H. J. Phys. Chem. B 1997, 101, 5822. [24] Miller, C. J.; Rose, A. L.; Waite, T. D. Anal. Chem. 2010, 83, 261. [25] Tsaplev, Y. B. J. Anal. Chem. 2012, 67, 506. [26] Wang, D.; Zhao, L.; Guo, L.-H.; Zhang, H. Anal. Chem. 2014, 86, 10535. [27] Daimon, T.; Hirakawa, T.; Kitazawa, M.; Suetake, J.; Nosaka, Y. Appl. Catal., A: General 2008, 340, 169. [28] Tsujiko, A.; Itoh, H.; Kisumi, T.; Shiga, A.; Murakoshi, K.; Nakato, Y. J. Phys. Chem. B 2002, 106, 5878. [29] Connor, P. A.; Dobson, K. D.; McQuillan, A. J. Langmuir 1999, 15, 2402. [30] Merenyi, G.; Lind, J.; Eriksen, T. E. J. Phys. Chem. 1984, 88, 2320. [31] Attwood, A. L.; Murphy, D. M.; Edwards, J. L.; Egerton, T. A.; Harrison, R. W. Res. Chem. Intermed. 2003, 29, 449. [32] Carter, E.; Carley, A. F.; Murphy, D. M. J. Phys. Chem. C 2007, 111, 10630. [33] Green, J.; Carter, E.; Murphy, D. M. Chem. Phys. Lett. 2009, 477, 340. [34] Li, Y.-F.; Aschauer, U.; Chen, J.; Selloni, A. Acc. Chem. Res. 2014, 47, 3361. [35] Hirakawa, T.; Nosaka, Y. Langmuir 2002, 18, 3247. [36] Li, X.; Chen, C.; Zhao, J. Langmuir 2001, 17, 4118. [37] Mattioli, G.; Filippone, F.; Amore Bonapasta, A. J. Am. Chem. Soc. 2006, 128, 13772.
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