水溶液中亚硝酸盐在紫外线照射下的苯酚光硝化作用II：pH值和二氧化钛的影响

Phenol photonitration upon UV irradiation of nitrite in aqueous solution II: effects of pH and TiO2.

作者信息

Vione D, Maurino V, Minero C, Pelizzetti E

机构信息

Dipartimento di Chimica Analitica, Università di Torino, Italy.

出版信息

Chemosphere. 2001 Nov;45(6-7):903-10. doi: 10.1016/s0045-6535(01)00036-4.

DOI:10.1016/s0045-6535(01)00036-4

PMID:11695612

Abstract

Phenol photonitration and photonitrosation were studied both in homogeneous and in heterogeneous phase in the presence of TiO2 particles. The effect of pH as well as of the semiconductor particles on the kinetics and products of the reaction was observed. Formation of nitrophenols is enhanced at acidic pH, due to thermal processes initiated by nitrous acid, as well as in the presence of TiO2, due to the photocatalytic oxidation of nitrite.

摘要

在TiO₂颗粒存在的情况下，研究了苯酚的光硝化和光亚硝化反应，包括均相和非均相体系。观察了pH值以及半导体颗粒对反应动力学和产物的影响。在酸性pH条件下，由于亚硝酸引发的热过程，以及在TiO₂存在下，由于亚硝酸盐的光催化氧化作用，硝基苯酚的生成量增加。