纳米金属氧化物催化氧化5-羟甲基糠醛

摘要

In order to explore the oxidation path of 5-hydroxymethylfurfural(5-HMF)and the catalytic performance of metal oxide for 5-HMF oxidation, a series of nanoscale metal oxides were synthesized, such as ZnO, CuO, SnO2, Fe2O3, Co3O4and Fe3O4. The oxidation path of 5-HMF was investigated in an alkaline condition using hydrogen peroxide as oxidant, and the products were analyzed by HPLC. The redults showed that 5-HMF is prone to the Cannizzaro reaction in the alkaline condition.And CuO had the best catalytic activity,4.2% yield of 2,5-furan dicarboxylic acid(FDCA)and 26.2% yield of HMFCA were obtained when the amount of catalyst used is 1/10 of the mass of 5-HMF and the amount of hydrogen peroxide is 2.5 mL.At the same time,the yield of FDCA increases with the augment of catalyst and hydrogen peroxide.%为探索金属氧化物对于5-羟甲基糠醛(5-HMF)氧化的催化性能及5-HMF的氧化路径,制备了纳米级ZnO、SnO2、CuO、Fe2O3、Co3O4、Fe3O4催化剂,并在碱性环境中以双氧水为氧化剂催化氧化5-HMF.利用高效液相色谱(HPLC)对氧化产物进行了定性和定量分析.结果表明:碱性环境下,5-HMF首先发生坎尼扎罗反应;与其他金属氧化相比CuO的催化效果最好,当催化剂的用量为5-HMF质量的1/10、双氧水用量为2.5 mL时, 2,5-呋喃二甲酸(FDCA)产率为4.2%,5-羟甲基-2-呋喃甲酸(HMFCA)产率为26.2%.同时,随着双氧水和催化剂用量的增大,FDCA的产率有所提高.