THE EFFECTS OF Ag, Pd AND Ag+, Pd2+ ON PHOTODE GRADATION OF CH3CHO CATALYZED BY TiO2

doi:10.7517/j.issn.1674-0475.1999.01.12

Imaging Science and Photochemistry ›› 1999, Vol. 17 ›› Issue (1): 12-16.DOI: 10.7517/j.issn.1674-0475.1999.01.12

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THE EFFECTS OF Ag, Pd AND Ag⁺, Pd²⁺ ON PHOTODE GRADATION OF CH₃CHO CATALYZED BY TiO₂

YAO Xiaobin¹, MA Ying², YAO Jiannian²

1. Institute of Chemical Engineering, Amakasu Chemical Industries, Japan;
2. Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101, P. R. China

Received:1998-11-17 Revised:1998-11-23 Online:1999-02-20 Published:1999-02-20

Abstract

Abstract: Photodegradation of CH₃CHO catalyzed by TiO₂ was accelerated after Ag⁺ or Pd²⁺ was added into TiO₂ aqueous suspension. Under nitrogen, Ag⁺ and Pd²⁺ only acted as electron acceptors to separate electron and hole well, while under oxygen, Ag⁺ and Pd²⁺ not only acted as electron acceptors but also increased H₂O₂ produced by illumination in the suspension. But photocatalytic activity of TiO₂ was only improved under oxygen after surface modification was used. Our results show that the concentration of H₂O₂ in the suspension has great effect on photodegradation of CH₃CHO assisted by TiO₂.

Key words: photocatalysis of TiO₂, CH₃CHO, surface modification, ionic effect

YAO Xiaobin, MA Ying, YAO Jiannian. THE EFFECTS OF Ag, Pd AND Ag⁺, Pd²⁺ ON PHOTODE GRADATION OF CH₃CHO CATALYZED BY TiO₂[J]. Imaging Science and Photochemistry, 1999, 17(1): 12-16.

References

1 姚晓斌, 马颖, 姚建年. 贵金属对TiO₂悬浮液光照过程中H₂O₂生成量的影响. 感光科学与光化学, 印刷中(Yao X B, Ma Y, Yao J N. The effect of noble metal modification and addition of ion on the generation of H₂O₂ in the TiO₂ aqueous suspension. Photographic Science and Photochemistry, in press)
2 Cai R, Hashimoto K, Fujishima A. Conversion of photogenerated superoxide anion into hydrogen peroxide in titanium dioxide suspension system. J. Electroanal. Chem., 1992, 326(1～2): 345～350
3 Cai R, Kubota Y, Shuin T, et al. Induction of cytotoxicity by photo-excited TiO₂ particles. CANCER RESEARCH, 1992, 52: 2346～2348
4 Kormann C, Bahnemann D W, Hoffmann M R. Photolysis of chloroform and other organic molecules in aqueous titanium dioxide suspensions. Environ. Sci. Technol., 1991, 25(3): 494～500
5 Minero C, Maurino V, Campnella L, et al. Photodegradation of 2-ethoxy- and 2-butoxyethanol in the presence of semiconductor particles or organic conducting polymer. Environ. Technol. Lett., 1989, 10(3): 301～310
6 Matthews R W. Photo-oxidation of organic material in aqueous suspensions of titanium dioxide. Water Res., 1986, 20(5): 569～578
7 Okamoto K, Yamamoto Y, Tanaka H, et al. Heterogeneous photocatalytic decomposition of phenol over anatase powder. Bull. Chem. Soc. Jpn., 1985, 58(7): 2015～2022
8 Kraeutler B, Bard A J. Heterogeneous photocatalytic synthesis of methane from acetic acid—new Kolbe reaction pathway. J. Am. Chem. Soc., 1978, 100: 2239～2240; Heterogeneous photocatalytic decomposition of saturated carboxylic acids on titanium dioxide powder. Decarboxylative route to allcanes. J. Am. Chem. Soc., 1978, 100:5985～5992
9 Izumi I, Fan F F, Bard A J. Heterogeneous photocatalyutic decomposition of benzoic acid and adipic acid on platinized titanium dioxide powder. J. Phys. Chem., 1981, 85: 218～223
10 Izumi I, Dunn W W, Wilbourn K O, et al. Heterogeneous photocatalytic oxidation of hydrocarbons on platinized titanium dioxide powders. J. Phys. Chem., 1980, 84(23): 3207～3210
11 Augugliaro V, Palmisano L, Sclafani A, et al. Photocatalytic degradation of phenol in aqueous titanium dioxide dispersions. Toxicol. Environ. Chem., 1988, 16(2): 89～109

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THE EFFECTS OF Ag, Pd AND Ag⁺, Pd²⁺ ON PHOTODE GRADATION OF CH₃CHO CATALYZED BY TiO₂

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