精品文档---下载后可任意编辑PVP 修饰下的含铁氧化物催化水合肼还原硝基苯的开题报告摘要：本文讨论了 PVP 修饰下的含铁氧化物催化水合肼还原硝基苯的反应。采纳 FeCl3 和 PVP 作为前驱体，通过共沉淀法制备含铁氧化物的催化剂；并通过 X 射线衍射、扫描电镜、傅里叶变换红外光谱、紫外光-可见光漫反射光谱等手段对催化剂进行表征。讨论了催化剂的添加量、反应时间、反应温度、反应物配比等因素对还原反应的影响。结果表明，PVP 修饰的含铁氧化物催化剂能够高效催化水合肼还原硝基苯的反应，当催化剂添加量为 1%时，在反应时间 5h、温度 50℃、反应物比为 1:3 的条件下，硝基苯的转化率可达 92.3%，对映选择性达到 85.8%。关键词：PVP 修饰，含铁氧化物催化剂，水合肼，硝基苯，还原反应Abstract:This paper studies the reduction of nitrobenzene catalyzed by iron oxide with PVP modification. FeCl3 and PVP were used as precursors to prepare a catalyst containing iron oxide by the co-precipitation method. The catalyst was characterized by X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and ultraviolet-visible diffuse reflectance spectroscopy. The effects of the amount of catalyst, reaction time, reaction temperature, and reactant ratio on the reduction reaction were studied. The results show that the iron oxide catalyst modified with PVP can efficiently catalyze the reduction of nitrobenzene. When the amount of catalyst is 1%, the conversion rate of nitrobenzene can reach 92.3% under the conditions of 5h reaction time, 50℃ reaction temperature, and reactant ratio of 1:3, and the enantioselectivity is up to 85.8%.Keywords: PVP modification, iron oxide catalyst, hydrazine hydrate, nitrobenzene, reduction reaction.
