Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (6): 1933.doi: 10.7503/cjcu20200727

• Physical Chemistry • Previous Articles     Next Articles

Effect of Light Source on the Photocatalytic Performance of Dihydroxynaphthalene by Water-soluble Sulfonated Porphyrins

ZHU Qichen1, XIONG Ming2, TAO Siyu1, TANG Siwei1, REN Qizhi1()   

  1. 1.School of Chemistry and Chemical Engineering,Shanghai Jiaotong University,Shanghai 200240,China
    2.R&D Center,Wuxi Little Swan Electric Co. Ltd. ,Wuxi 214028,China
  • Received:2020-09-30 Online:2021-06-10 Published:2021-06-08
  • Contact: REN Qizhi E-mail:qzren@sjtu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21371120)

Abstract:

Water-soluble sulfonated porphyrins(TPPS, TMPPS and FeTPPS) were synthesized. Taking hydrogen peroxide as the oxidant and iodine-tungsten lamp as the light source, these porphyrins can photo-catalyze the oxidation of 1,5-dihydroxynaphthalene efficiently, the product is 5-hydroxy-1,4-naphthalene-diquinone. The fluorescence quantum yield and lifetime were measured, and the catalytic mechanism was analyzed. The effect of light sources under different wavelength range(350―650 nm) and power range(0―20 W) on the photo-catalytic activities by different porphyrins were investigated. It is shown that light sources with different wave bands have a certain effect on the photocatalytic performance of porphyrin catalysts. The order of the reactant conversion rate is: λ380―385>λ360―370>λ580―585>λ620―630>λ492―577>λ450―470, which has close correlation with the ultraviolet-visible absorption of porphyrins. For free base porphyrins, when the same wavelength band of the light source was used, the reaction rate constants show fine linear relation with the power of the light source. For iron porphyrin FeTPPS, because of its photolysis, its catalytic activities are greatly depending on the catalyst stabilities at different power of the light sources.

Key words: Porphyrin, 1, 5-Dihydroxynaphthalene, meso-Tetrakis-(4-methoxyphenyl-3-surfophenyl)-porphine iron(Ⅲ) chloride, Photolysis

CLC Number: 

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