在不添加有机模板剂的情况下,通过尿素缓慢分解调节局部pH值,水热法合成了具有均一孔道直径的磷酸镍纳米管材料(NiPO-NTs).采用N2吸附-脱附、吡啶吸附红外光谱和氨程序升温脱附对材料进行了表征,并将其用于催化H2O2氧化的环己烯反应中,考察了反应条件对环氧化反应性能的影响.结果表明,NiPO-NTs具有狭窄的孔径分布,比表面积为96.6m2/g,其表面酸中心以弱Lewis酸为主.该反应中以乙腈为溶剂较为适宜,高温和高H2O2/环己烯摩尔比有利于提高环己烯转化率;而低温和高H2O2/环己烯摩尔比有利于提高环氧环己烷选择性.在60℃,H2O2/环己烯摩尔比为3,反应6h时,环己烯转化率可达50.6%,环氧环己烷选择件为72.1%.
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