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

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%.