ANALYZED AND PROPOSED MECHANISM OF PHOTOCATALYTIC DEGRADATION OF FURFURAL AT TIO2 NANO-PARTICLES BY HPLC-UV AND LC-MASS METHODS

作者：Ahmadi F^*; Zarrin L; Sharifnia S; Hosseini S N

来源：Journal of Liquid Chromatography & Related Technologies, 2014, 37(12): 1750-1762.

DOI：10.1080/10826076.2013.809543

• immobilized TiO2 nanoparticles
• HPLC
• 2,3-Dihydroxy-succinic acid
• LC-Mass
• furfural photocatalytic degradation
• maleic acid

In this work the degradation of furfural in aqueous solution was investigated by means of photo catalysis of TiO2 nanoparticles with 25nm crystallite sizes and surface area of 50 +/- 10m(2) g(-1), that was immobilized on a glass support by impregnation and calcination methods. The effects of amount of TiO2, irradiation intensity, and pH on efficiency of TiO2 nanoparticles were studied by HPLC-UV method. The optimum conditions are found as follows: pH=7, 120min of irradiation, and 125W light intensity. In addition, the mechanism of photocatalytic degradation of furfural was studied by LC-Mass technique. According to the LC-MASS data we proposed three steps for furfural degradation including aldehyde group oxidation, photo-oxidation of aromatic ring and ring cleavage. Furfural photocatalytic reaction in 140min led to production of maleic and 2, 3-Dihydroxy-succinic (tartaric) acids as intermediates.

• 出版日期2014-7-21