Biomass-based activated carbon is added with surface oxygen-containing groups(SOGs)through being modified by nitric acid,and the modulation of surface functional groups of carbon material on the performance of the catalyst for catalytic oxidation reaction of benzyl alcohol is investigated.The prepared catalyst is characterized by means of SEM,XRD,XPS and other measurements,and the influence of the concentration of nitric acid on the level of SOGs on activated carbon is studied.It is found that the conversion of benzyl alcohol reaches 94%and the selectivity is 99%when the AC-1.5 catalyst,which is obtained through treating the activated carbon with HNO3 at a concentration of 1.5 mol·L-1,and then calcined,is served as the catalyst.The AC-1.5 catalyst can maintain its activity after it has been used for five times at least.This is mainly due to the high carbonyl content in AC-1.5.This study result can provide a reference for the development of efficient and low-cost biomass-based catalysts.
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