碳包覆MnFe_2O_4(MnFe_2O_4@C)纳米球的制备及其对重金属离子[Cu(Ⅱ)、Pb(Ⅱ)]的去除  

Synthesis of Carbon-coated MnFe_2O_4 Nanospheres for Heavy Metals [Copper (Ⅱ) and Lead (Ⅱ)] Removal

作　　者：黄秋安[1] 邓辉辉[1] 姚利兵[1] 杜高辉[1] 

机构地区：[1]浙江师范大学物理化学研究所,浙江金华321004

出　　处：《广东化工》2017年第9期12-14,共3页Guangdong Chemical Industry

摘　　要：以FeCl_3·6H_2O与Mn(CH_3COO)_2·4H_2O为原材料,用乙二醇作为溶剂,通过简易的水热方法制备出MnFe_2O_4纳米球;然后以葡萄糖作为碳源制备出MnFe_2O_4@C复合材料。所制备材料的形貌和微观结构经过SEM和TEM表征,其表征结果显示MnFe_2O_4@C复合材料的形貌是直径约为200~300 nm的微球,且一层厚度约为3~5 nm的碳层均匀的包覆在MnFe_2O_4微球的表面。同时还探究了MnFe_2O_4@C复合材料对水溶液中Cu(Ⅱ)、Pb(Ⅱ)的吸附性能。实验结果表明,当溶液pH为8时,MnFe_2O_4@C磁性吸附剂对Cu(Ⅱ)、Pb(Ⅱ)的去除效率分别达到了93.9%和98.2%;此外,MnFe_2O_4@C磁性吸附剂的再生性能研究结果显示,在循环使用三次以后,MnFe_2O_4@C吸附剂对Cu(Ⅱ),Pb(Ⅱ)的去除效率仍然可以达到80%和90%以上,相比于首次使用,其去除效率只有轻微的降低。Hydrothermal synthesis of MnFe2O4 nanospheres using FeCl3·6H2O and Mn（CH3COO）2·4H2O as raw material and ethylene glycol as sokent. MnFe2O4@C composites were successfully synthesized using glucose as carbon source. The synthesized MnFe2O4@C composites were examined by SEM and TEM The as-obtained products are all spherical with diameters ranging from 200 to 300 nm and with a uniform carbon layer about 3-5 nm in thickness. The adsorption performance of the MnFe2O4@C composites removing Cu（ II ） and Pb（ II ） were also investigated. The results showed that when the solution pH is 8, the removal efficiencies of MnFe2O4@C composites were 93.9 % for Cu（ II ）, and 98.2 % for Pb（ II ）, respectively. Besides, the results showed that the regeneration of adsorbent. after 3 cycles, the removal efficiencies of MnFe2O4O@C composites were above 80 % for Co（ II ）, and 90 % for Pb（ II ）, respectively, with slight reduction.

关 键 词：纳米复合材料 吸附 重金属 Cu(Ⅱ) Pb(Ⅱ) 

分 类 号：TQ[化学工程]