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将单腈胺浸渍到竹叶上,在N2气氛中600℃焙烧,制备高比表面积的石墨型氮化碳/竹叶炭(g-C3N4/BC),以得到活性稳定、易于循环利用的催化材料。采用XRD、FT-IR、SEM、BET等方法对g-C3N4/BC进行表征。将g-C3N4/BC作为催化剂用于催化氧气氧化环己基苯(CHB)合成苯酚和环己酮。考察了反应温度、氧气压力和催化剂重复使用对反应的影响。结果表明:在g-C3N4/BC催化作用下,110℃、1.1 MPa O2下反应4 h,CHB转化率为16.7%,苯酚和环己酮选择性分别为64.0%和57.0%。催化剂循环使用10次,催化性能没有明显变化。并提出了g-C3N4/BC催化氧化CHB的反应途径和催化机理。
Mononitrilamine was impregnated onto bamboo leaves and calcined at 600 ° C in an N2 atmosphere to produce graphite-type carbon nitride / bamboo charcoal (g-C3N4 / BC) with a high specific surface area to obtain a catalyst that was stable in activity and easy to recycle material. The structure of g-C3N4 / BC was characterized by XRD, FT-IR, SEM and BET. The catalyst of g-C3N4 / BC was used to catalyze the oxidation of cyclohexylbenzene (CHB) to phenol and cyclohexanone by oxygenation. The effects of reaction temperature, oxygen pressure and catalyst re-use on the reaction were investigated. The results showed that under the catalysis of g-C3N4 / BC, the conversion of CHB was 16.7% and the selectivity to phenol and cyclohexanone was 64.0% and 57.0% respectively at 110 ℃ and 1.1 MPa O2 for 4 h. The catalyst was recycled 10 times without any significant change in catalytic performance. The reaction pathway and catalytic mechanism of the catalytic oxidation of CHB by g-C3N4 / BC were also proposed.