磁性可回收Fe_2O_3@C-Pt催化剂的制备及其催化还原对硝基苯酚（英文）

Preparation of magnetically recoverable Fe_2O_3@C-Pt catalyst and its application in the reduction of 4-nitrophenol

合成了一种具有壳/核结构的水热碳包覆型Fe_2O_3@C微米球,可实现贵金属Pt催化剂的低价制备和高效利用.利用外壳水热碳的亲水特性,通过简单的常温吸附与低温焙烧的方法在Fe_2O_3@C微球表面原位负载Pt纳米颗粒,构筑了壳/核型Fe_2O_3@C-Pt催化剂.该催化剂在6min内实现对硝基苯酚的完全转化,循环10次后催化活性保持不变,表现出较高的催化活性和稳定性.作为内核的磁性γ-Fe_2O_3颗粒使得Fe_2O_3@C-Pt催化剂仅通过外加磁铁即可实现其在反应溶液中的快速分离,降低了催化剂的回收成本和时间,并显著提高回收产率.

To improve the catalytic efficiency of Pt catalysts, Fe2O3@C micro-sphere with the core/shell structure was successfully prepared by initially coating hydrothermal carbon over Fe2O3, and then an adsorption of Pt over Fe2O3@C micro-sphere; subsequent low temperature calcinations were carried out to get the final Fe2O3@C-Pt catalyst owing to the hydrophilic properties of hydrothermal carbon. This novel Fe2O3@C-Pt catalyst shows a good catalytic activity and stability for the reduction of 4-nitrophenol to4-aminophenol, and there is no significant loss in catalytic activity after 10 cycles. The magnetic γ-Fe2O3 core endows the catalyst with a magnetically separable property, which can be conveniently recovered from the reaction solution using an extra magnet,finally leading to a simple separation of the catalyst and increasing the recovery yield of Pt significantly as well.