Co修饰介孔磷酸铝负载纳米金的制备及其催化环己烷氧化

Preparation of Co-Modified Mesoporous Aluminum Phosphate Supported Nano Gold and Its Catalytic Activity for Cyclohexane Oxidation

采用模板法制备了不同含量的Co修饰介孔磷酸铝(Co_x-APO),然后通过水热合成法制备一系列Co修饰介孔磷酸铝负载纳米金复合催化剂(Au@Co_x-APO),并考察其在环己烷选择性氧化制备环己醇和环己酮(KA油)反应中的催化性能,并采用X射线衍射(XRD),扫描电镜(SEM),红外光谱和氮气吸脱附等对Co_x-APO和Au@Co_x-APO催化剂进行表征。结果表明,Au@Co_x-APO在环己烷的选择性氧化反应中表现出较好的催化活性和选择性,在Au负载量为4.5%,催化剂用量为0.01g/mL(以环己烷为准),空气压力1 MPa,温度120℃的条件下反应2 h,KA油的产率可达到9.7%,选择性高达93%。

Different content of Co modified mesoporous aluminum phosphate(Cox-APO)was prepared by template method.Then a series of Co-modified mesoporous aluminum phosphate supported nano-gold composite catalysts(Au@Cox-APO)were prepared by hydrothermal synthesis.The catalytic performance of the selective oxidation of cyclohexanol to cyclohexanone(KA oil)in cyclohexane was investigated.Cox-APO and Au@Cox-APO catalysts were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),infrared spectroscopy and nitrogen adsorption.The results showed that Au@Cox-APO exhibited good catalytic activity and selectivity in the selective oxidation of cyclohexane.Under the condition of Au loading 4.5%,catalyst dosage 0.01 g/mL(cyclohexane),air pressure 1 MPa and temperature 120℃for 2 h,the yield of KA oil could reach 9.7%,and the selectivity was as high as 93%.