离子热合成CdMoP复合氧化物及其催化性能研究

Ionthermal synthesis of CdMoP composite oxide and its catalytic performance

摘要:

采用离子液体热合成法制备了新型镉钼磷（CdMoP）系列复合氧化物催化剂，并通过FT-IR、XRD、SEM、TEM及XPS等表征手段对催化剂物化性质进行表征。由表征结果可知离子液体不仅能够进入CdPMo-80催化剂骨架，同时还能将P元素固定于催化剂中，从而呈现出有序增长的层状结构且拥有较多强酸中心。将以环己烯氧化制备环氧环己烷为探针反应，考察了CdMoP-80复合金属氧化物催化剂的催化性能。结果表明，在催化剂用量0.2 g，质量分数为30%的过氧化氢4 mL，环己烯2 mL，乙腈4 mL，55 oC条件下反应4 h后定性定量分析，环己烯的转化率为99.2%，环氧环己烷的选择性为97.0%。

Abstract:

The novel cadmium molybdenum phosphorous (CdMoP) series composite oxide catalyst was prepared by ionic liquid thermal synthesi, and the physicochemical properties of the catalysts were characterized by FT-IR, XRD, SEM, TEM and XPS. The characterization results show that the ionic liquid can not only enter the framework of the CdPMo-80 catalyst, but also fix the P element in the catalyst, thus presenting an orderly growth layered structure and having more strong acid centers. The catalytic performance of the CdMoP-80 composite metal oxide catalyst was investigated by using cyclohexene oxidation to prepare cyclohexane oxide as a probe reaction. The results indicated that the product was qualitatively and quantitatively analyzed after reacting for 4 hours at 55 oC with a catalyst dosage of 0.2 g, 4 mL of 30% hydrogen peroxide, 2 mL of cyclohexene, and 4 mL of acetonitrile. The conversion rate of cyclohexene was 99.2%, and the selectivity of cyclohexene oxide was 97.0%.