摘要
将市售的煤质活性炭用不同浓度的硝酸处理后，在乙腈体系下催化苯一步羟化成苯酚．并对处理过的活性炭进行Boehm滴定、XPS／EDX、BET等方法表征，发现活性炭表面羧基的数量是影响其催化活性的主要因素．得到苯酚的最高收率为15.7％，选择性为87．2％．
Commercially available coal-based activated carbon was treated by nitric acid with different concentrations and the resultant samples were used as catalysts for the direct hydroxylation of benzene to phenol in acetonitrile. Boehm titration, X-ray photoelectron spectroscopy, scanning electron microscope coupled with an energy dispersive X-ray microanalyzer, and Brunauer-Emmett-Teller method were used to characterize the samples. The number of carboxyl groups on the surface was found to be the main factor affecting the catalytic activity. An optimum catalytic performance with a yield of 15.7% and a selectivity of 87.2% to phenol was obtained.
基金
This work was supported by the National Natural Science Foundation of China （No.20502017, No.20872102, and No.21021001）, the Program for Changjiang Scholars and Innovative Research Team in University （No.IRT0846）, and the characterization of the catalyst from Analytic and Testing Center of Sichuan University are greatly appreciated.
关键词
活性炭
催化活性
羧基
过氧化氯
苯酚
Activated carbon, Catalytic activity, Carboxyl group, Hydrogen peroxide, Phenol
