高值化利用含Sb(Ⅲ)废水制备Fe_(3)O_(4)/Sb_(2)O_(4)@C复合材料及其性能研究  

Properties of Fe_(3)O_(4)/Sb_(2)O_(4)@C Composite Material Synthesized by High Value Utilization of Sb(Ⅲ)-Containing Wastewater

作　　者：刘程锦 文敏玥 聂淑晴 缪畅[1] 肖围[1] 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)

机构地区：[1]长江大学化学与环境工程学院,湖北荆州434023

出　　处：《矿冶工程》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)。

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.

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 

分 类 号：X703[环境科学与工程—环境工程]