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3D Porous Carbon Framework Stabilized Ultra‐Uniform Nano γ‐Fe2O3: A Useful Catalyst System
Chemistry - An Asian Journal ( IF 4.1 ) Pub Date : 2017-12-07 , DOI: 10.1002/asia.201701457
Yongjian Ai 1, 2 , Mengqi He 2 , Qianrui Lv 1 , Lei Liu 2 , Hong-bin Sun 2 , Mingyu Ding 1 , Qionglin Liang 1
Affiliation  

We present a novel strategy for the scalable fabrication of γ‐Fe2O3@3DPCF, a three‐dimensional porous carbon framework (PCF) anchored ultra‐uniform and ultra‐stable γ‐Fe2O3 nanocatalyst. The γ‐Fe2O3@3DPCF nanocomposites were facilely prepared with the following route: condensation of iron(III) acetylacetonate with acetylacetonate at room temperature to form the polymer precursor (PPr), which was carbonized subsequently at 800 °C. The homogeneous aldol condensation offered an ultra‐uniform distribution of iron, so that the γ‐Fe2O3 nanoparticles (NPs) were uniformly distributed in the 3D carbon architecture with the average size of approximate 20 nm. The Fe2O3 NPs were capped with carbon, so that the iron oxide maintained its γ‐phase instead of the more stable α‐phase. The nanocomposite was an excellent catalyst for the reduction of nitroarene; it gave >99 % conversion and 100 % selectivity for the reduction of nitroarenes to the corresponding anilines at 100 °C. The fabrication of the γ‐Fe2O3@3DPCF nanocatalyst represents a green and scalable method for the synthesis of novel carbon‐based metal oxide nanostructures.

中文翻译:

3D多孔碳骨架稳定的超均匀纳米γ-Fe2O3:有用的催化剂体系

我们提出的新策略为γ-Fe的可伸缩的制造2 ö 3 @ 3DPCF,三维多孔碳骨架(PCF)锚定的超均匀和超稳定了γ-Fe 2 ö 3纳米催化剂。所述γ-的Fe 2 ö 3被轻便与下列路线制备@ 3DPCF纳米复合材料:乙酰丙酮与铁(III)乙酰丙酮化物的缩合在室温下,以形成所述聚合物前体(PPR),将其在800随后碳化℃。将均匀的醇醛缩合提供铁的超均匀分布,从而使γ-的Fe 2 ö 3纳米粒子(NP)均匀分布在3D碳结构中,平均大小约为20 nm。Fe 2 O 3 NPs被碳封端,因此氧化铁保持其γ相而不是更稳定的α相。纳米复合材料是还原硝基芳烃的极佳催化剂。在100°C时,硝基芳烃还原为相应的苯胺的转化率> 99%,选择性为100%。所述γ-Fe的制造2 ö 3 @ 3DPCF纳米催化剂代表了新的基于碳-金属氧化物纳米结构的合成绿色和可扩展的方法。
更新日期:2017-12-07
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