Kinetics of Photo-Induced Reduction of m-Nitroacetophenone with TiO2 Powder

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Yoshikazu Miyake¹  Junichi Miyuki¹ 

[1] Department of Chemical Engineering, Faculty of Engineering and High Technology Research Center, Kansai University

关键词: Photo-Induced Reaction;    m-Nitroacetophenone;    m-Aminoacetophenone;    TiO2 Powder;    Reaction Kinetics;   

DOI  :  10.1252/jcej.33.372

来源: Maruzen Company Ltd

【 摘 要 】

References(14)Cited-By(1)The photo-induced reduction rate of m-nitroacetophenone (NAP) in the presence of TiO2 powder (anatase and rutile forms) is obtained by measuring the time-courses of the concentration of a product, m-aminoacetophenone (AAP). This photo-induced overall reaction in the ethanol is expressed asNO2C6H4COCH3 + 3C2H5OH → NH2C6H4COCH3 + 3CH3CHO + 2H2OThe photo-induced reduction rate of NAP is dependent on the TiO2 and initial NAP concentrations. The time courses of the AAP concentration normalized by the initial NAP concentration decrease with increasing initial NAP concentration. These characteristics can be interpreted by the non-linear differential equation as follows,d[AAP]/dt = k([NAP]0 − [AAP])(2k0t − 6[AAP])where [NAP]0 is the initial NAP concentration. The rate constants, k0 and k, express the oxidation rate of ethanol and the reduction rate of NAP, respectively. The value of k0 is dependent on the initial NAP and TiO2 concentrations. It takes a maximum value of 4.0 g/dm3 for anatase and 1.0 g/dm3 for rutile when the initial NAP concentration is about 1.0 mmol/dm3. Then, the maximum value for anatase is 11.1 times that of rutile. The value of k0 decreases with increasing initial NAP concentration. The k value is independent of the TiO2 and initial NAP concentrations, and the same value for both anatase and rutile forms is obtained.

【 授权许可】

Unknown