Copper and iron extraction from chalcopyrite by NaCl@MgCl_(2)@urea:Synthesis of CuFe_(2)O_(4)electrodes for supercapacitors  

利用NaCl@MgCl_(2)@尿素萃取黄铜矿中的Cu、Fe并合成超级电容器用CuFe_(2)O_(4)电极

作　　者：POLAT Safa MOHAMMED Mariem MASHRAH Muwafaq 

机构地区：[1]Materials Research and Development Centre,Karabuk University,Karabük 78050,Türkiye [2]Nano Energy Laboratory,Karabuk University,Karabük 78050,Türkiye [3]Metallurgy and Materials Engineering,Karabuk University,Karabük 78050,Türkiye

出　　处：《Journal of Central South University》2025年第1期82-93,共12页中南大学学报(英文版)

摘　　要：This study was conducted in two sections.Initially,the effects of NaCl,MgCl_(2),and urea were investigated on extracting copper and iron from chalcopyrite.Subsequently,CuFe_(2)O_(4)-based electrodes for supercapacitors were synthesized using the extracted solution.The first phase revealed that 3 mol/L NaCl achieved the highest extraction performance,yielding 60%Cu and 23%Fe.MgCl_(2)at 1.5 mol/L extracted 52%Cu and 27%Fe,while a combination of 0.5 mol/L MgCl_(2)and 1.6 mol/L urea yielded 57%Cu and 20%Fe.Urea effectively reduced iron levels.CuFe_(2)O_(4)-based electrodes were then successfully synthesized via a hydrothermal method using a MgCl_(2)-urea solution.Characterization studies confirmed CuFe_(2)O_(4)formation with a 2D structure and 45−50 nm wall thickness on nickel foam.Electrochemical analysis showed a specific capacitance of 725 mF/cm^(2)at 2 mA/cm^(2)current density,with energy and power densities of 12.3 mW·h/cm^(2)and 175 mW/cm^(2),respectively.These findings suggest that chalcopyrite has the potential for direct use in energy storage.本研究分为两部分。首先,研究了NaCl、MgCl_(2)和尿素对黄铜矿中铜和铁的萃取效果。随后,利用提取的溶液合成了CuFe_(2)O_(4)超级电容器电极。研究结果表明,3 mol/L NaCl萃取效果最佳,Cu回收率为60%,Fe回收率为23%。1.5 mol/L的MgCl_(2)萃取出52%的Cu和27%的Fe,0.5 mol/L的MgCl_(2)和1.6 mol/L的尿素萃取出57%的Cu和20%的Fe。尿素有效地降低了铁含量。采用水热法,以MgCl_(2)-尿素溶液成功地合成了CuFe_(2)O_(4)基电极。表征研究证实在泡沫镍表面形成了具有二维结构、45~50 nm壁厚的CuFe_(2)O_(4)。电化学分析表明,在2 m A/cm^(2)电流密度下,比电容为725 m F/cm^(2),能量和功率密度分别为12.3 m W·h/cm^(2)和175 m W/cm^(2)。这些发现表明黄铜矿具有直接用于能量储存的潜力。

关 键 词：COPPER IRON NACL MgCl_(2) UREA thiourea CHALCOPYRITE supercapacitor copper ferrite 

分 类 号：O64[理学—物理化学]