Zn^(2+)-Al^(3+)-LDHs@Al构建及其吸附氟离子的性能  

Synthesis of Zn^(2+)-Al^(3+)-LDHs@Al and its performance for adsorption of fluorine ions

作　　者：马向荣[1] 党睿[1] 郭伟 任梦娇 杨方 弓莹[1] 亢玉红[1] 李霄[1] 张智芳[1] 李键 李沛 Ma Xiangrong;Dang Rui;Guo Wei;Ren Mengjiao;Yang Fang;Gong Ying;Kang Yuhong;Li Xiao;Zhang Zhifang;Li Jian;Li Pei(School of Chemistry and Chemical Engineering,YuLin University,YuLin,719000,Shaanxi,China;Ordos Dayuan Coal Co.,Ltd.,Ordos 017000,Inner Mongolia,China)

机构地区：[1]榆林学院化学与化工学院,陕西榆林719000 [2]鄂尔多斯市大源煤炭有限责任公司,内蒙古自治区鄂尔多斯017000

出　　处：《工业催化》2021年第7期28-34,共7页Industrial Catalysis

基　　金：国家自然科学基金(51762042,21763030)资助项目;陕西省科技厅项目(2018GY-086,2020TD-032,2017GY-131,2017JM2039,2020SF-408);陕西省科技资源开放共享平台项目(2019PT-18);榆林学院重点计划项目(14YK22)。

摘　　要：以硝酸锌、硝酸铝为原料,尿素为沉淀剂,采用均相沉淀技术,在铝基体表面原位生长Zn^(2+)-Al^(3+)-LDHs薄膜。采用XRD、FT-IR、SEM和EDS等对铝片表面构建的Zn^(2+)-Al^(3+)-LDHs的成分和结构进行分析表征,研究表明,Zn^(2+)-Al^(3+)-LDHs膜均匀生长在铝基体表面,具有典型的LDHs材料的层状结构。研究了Zn^(2+)-Al^(3+)-LDHs@Al在不同焙烧温度条件下吸附氟离子的性能,研究表明,Zn^(2+)-Al^(3+)-LDHs@Al对氟离子的吸附量随着焙烧温度的升高,吸附量逐渐增大,焙烧温度为300℃时吸附量达到最大,氟离子吸附量为0.0156 mg·cm^(-2),氟去除率约98.2%。Zn^(2+)-Al^(3+)-LDHs thin film was synthesized on the surface of aluminum substrate by in-situ growth technology with Zn(NO_(3))_(2)·6H_(2)O,Al(NO_(3))_(3)·9H_(2)O as raw materials and urea as precipitant.The component and structure of the Zn^(2+)-Al^(3+)-LDHs were characterized by XRD,FT-IR,SEM,EDS and other methods.The characterization results show that the synthesized materials have the typical layered structure of LDHs material.The influence of calcination temperature on adsorption performance of Zn^(2+)-Al^(3+)-LDHs@Al was investigated.The research showed that adsorption capacity increases with the increasing of calcination temperature,and 300℃ was the best calcined temperature.The highest adsorbent dosage value was 0.0156 mg·cm^(-2) and the defluorination effficiency of the Zn^(2+)-Al^(3+)-LDHs@Al is 98.2%.

关 键 词：催化剂工程 Zn^(2+)-Al^(3+)-LDHs 循环利用 氟离子回收 吸附 

分 类 号：O611.4[理学—无机化学] O614.81[理学—化学]