摘要
采用液相还原法制备纳米零价铁(nZVI),以其吸附废水中的Sb(Ⅲ),得到nZVI/Sb颗粒;将其在500℃下氧气煅烧8 h,制得Fe_(3)O_(4)/Sb_(2)O_(4)材料;再以葡萄糖为碳源、600℃氮气热处理,制备了Fe_(3)O_(4)/Sb_(2)O_(4)@C复合材料,并对其性能进行了研究。结果表明,nZVI吸附含Sb(Ⅲ)废水的适宜条件为:中性溶液Sb(Ⅲ)初始浓度100 mg/L,nZVI投加量1.2 g/L,室温下吸附50 min,该条件下废水中Sb(Ⅲ)去除率为73%;引入Sb_(2)O_(4)后,铁基负极的首次放电比容量高达1065.6 mAh/g;包覆碳后,Fe_(3)O_(4)/Sb_(2)O_(4)@C复合材料电化学性能明显改善,100 mA/g电流密度下,循环150圈后放电比容量仍可保持在483.7 mAh/g,电流密度2000 mA/g时,放电比容量仍有118.2 mAh/g。
Nanometer zero⁃valent iron(nZVI)prepared by liquid phase reduction method was used to adsorb Sb(Ⅲ)in wastewater.Then,the obtained nZVI/Sb particles were subjected to calcination at 500℃in an oxygen oven for 8 h,yielding a material of Fe_(3)O_(4)/Sb_(2)O_(4).After that,the material was calcinated at 600℃under nitrogen flow with glucose as carbon source,and the Fe_(3)O_(4)/Sb_(2)O_(4)@C composite powders were finally synthesized.Based on the study of its properties,it is found that the Sb(Ⅲ)in the wastewater with an initial concentration of 100 mg/L is appropriately adsorbed with nZVI by adding an amount of 1.2 g/L at the room temperature for 50 min,leading to the removal rate of Sb(Ⅲ)up to 73%.After the incorporation of Sb_(2)O_(4),the prepared iron⁃base anode has an initial discharge specific capacity up to 1065.6 mAh/g.After being coated with carbon layer,the Fe_(3)O_(4)/Sb_(2)O_(4)@C composite have an obviously improved electrochemical performance,which can remain an discharge specific capacity of 483.7 mAh/g after 150 cycles at 100 mA/g,and 118.2 mA/g at 2000 mAh/g.
作者
刘程锦
文敏玥
聂淑晴
缪畅
肖围
LIU Cheng-jin;WEN Min-yue;NIE Shu-qing;MIAO Chang;XIAO Wei(College of Chemistry and Environmental Engineering,Yangtze University,Jingzhou 434023,Hubei,China)
出处
《矿冶工程》
CAS
CSCD
北大核心
2022年第4期139-144,共6页
Mining and Metallurgical Engineering
基金
国家自然科学基金(51874046)
湖北省自然科学基金杰出青年项目(2020CFA090)。
关键词
含锑废水
Sb(Ⅲ)
高值化利用
纳米零价铁
四氧化三铁
负极材料
锂离子电池
碳包覆
Sb(Ⅲ)⁃containing wastewater
Sb(Ⅲ)
high value utilization
nanometer zerovalent iron
Fe_(3)O_(4)
anode materials
lithium⁃ion battery
carbon encapsulation
