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本文通过溶剂热方法合成了二氧化铀-钯-石墨烯纳米复合材料.在这种复合材料中,金属钯和二氧化铀的纳米晶负载在石墨烯氧化物上,且钯纳米晶与二氧化铀纳米晶密切接触.这一复合材料对4-硝基苯酚还原反应表现出良好的催化活性,二氧化铀在其中发挥了关键作用.二氧化铀有效地防止钯颗粒在溶剂热过程中团聚、长大;此外,在钯与二氧化铀界面处,电子从钯转移至二氧化铀表面,为催化还原反应提供了更多的吸附和反应位点,从而有效地提高了催化剂活性.
In this paper, uranyl dioxide-palladium-graphene nanocomposites were synthesized by solvothermal method. In this composite, the nanocrystals of metal palladium and uranium dioxide were supported on graphene oxide, Uranium nanocrystals are in close contact with each other.The composite material shows a good catalytic activity for 4-nitrophenol reduction reaction and uranium dioxide plays a key role in it.Uranium dioxide can effectively prevent palladium particles from agglomerating during the solvothermal process, In addition, at the interface between palladium and uranium dioxide, the transfer of electrons from palladium to the surface of uranium dioxide provides more adsorption and reaction sites for the catalytic reduction reaction, thereby effectively improving the catalyst activity.