Preparation And Application Of Peach Gum Derived Carbon Materials

Biomass is an abundant, cheap, renewable and inexhaustible resource. Carbon materials can be prepared using biomass as a carbon precursor, by a simple and effective process. In this paper, peach gum derived carbon materials were successfully prepared through carbonization, activation, functionalization method and have potential application prospect, the main research content is as follows:1. A set of porous carbon has been successfully prepared by direct carbonization of peach gum at different temperature. The structure properties of the as-prepared materials were studied and they possessed high Brunauer-Emmett-Teller surface areas up to924m2/g and large pore volumes of about0.46-0.80cm3/g. Its application as adsorbent for Pb (II) and Cd (II) removal was investigated. The adsorption process could be described through the pseudo-second-order kinetic model and the adsorption isotherm was closely fitted with the Langmuir isotherm model. The maximum adsorption capacity for Pb (II) and Cd (II) removal in waste water could reach420.2and239.8mg/g, respectively.2. Several solid acid catalysts were prepared using peach gum by incomplete carbonization and then sulphonation. The properties of solid acid catalyst were characterized by various methods. In addition, we optimized reaction conditions that affect the transformation of fructose into5-HMF with the solid acid catalyst, such as temperature, time, ratio of fructose and catalyst. The results showed that peach gum-based solid acid catalyst had good catalytic activity. The yield of5-HMF can reach93%at the reaction condition of120℃,2min and the ratio of fructose and catalyst2:1. In addition, the solid acid catalyst can be reused for3times.3. Well-developed microporous carbons were prepared by KOH activation of a pre-carbonized gum-based carbon source within a temperature range of600℃-8O0℃. Textural characterization indicated that as-prepared carbons had a surface area of up to 2455m2/g and a pore volume of0.61-1.32cm3/g. When applied for CO2capture, these carbons exhibited excellent CO2adsorption capacities. In particular, the sample prepared at700℃using a KOH/precursor ratio of4:1showed an extraordinarily high CO2uptake of6.4mmol/g under0℃,1bar and4.5mmol/g under25℃,1bar as well as a selectivity of7/1for CO2/N2separation.