磷钼酸/氧化石墨烯复合材料的制备其氧化脱硫性能

摘要

Phosphomolybdic acid(PMoA)/graphene oxide(GO) were prepared by solid phase synthesis with GO and PMoA as precursor.The prepared composites were characterized by XRD,FTIR and SEM.The results showed that PMoA/GO kept the Keggin structure and PMoA was successfully intercalated into the structure of GO.The oxidative desulfurization of model oil containing thiophene was carried out by using hydrogen peroxide as oxidant and PMoA/GO as a catalyst.The results indicated that thiophene conversion can reach 87.6％ at 70 ℃,3％ H2O2(based on volume of model oil),the catalyst dosage 15 mg/mL and the reaction time 90 min.Moreover,the used PMoA/ GO still kept good desulfurization performance after recycling of 5 times,which were regenerated by centrifugalizing,washing and drying.%以氧化石墨(GO)和磷钼酸(PMoA)为原料,采用固相合成法制备了PMoA/GO复合材料,利用XRD、FTIR和SEM对所合成的材料进行表征.表征结果显示,PMoA/GO仍保持了PMoA的Keggin结构,PMoA成功插层到GO的片层结构中.以PMoA/GO为催化剂、H2O2为氧化剂,考察了催化剂对模拟油中噻吩的氧化脱硫性能.实验结果表明,反应温度为70℃、H2O2用量占模拟汽油体积3％、催化剂用量为15 mg/mL、反应时间为90 min的条件下,噻吩的转化率达87.6％.催化剂经离心、洗涤和干燥后,循环使用5次,依然保持良好的脱硫性能.