气溶胶辅助法合成球形氧化镁及其吸附性能研究
收稿日期: 2019-07-19
网络出版日期: 2020-02-26
基金资助
国家自然科学基金项目(U1607101);国家自然科学基金项目(U1808210)
Aerosol-assisted synthesis of spherical magnesium oxide and its adsorption properties
Received date: 2019-07-19
Online published: 2020-02-26
柴政泽 , 叶俊伟 , 田其哲 , 史磊 , 宁桂玲 . 气溶胶辅助法合成球形氧化镁及其吸附性能研究[J]. 无机盐工业, 2020 , 52(1) : 39 -43 . DOI: 10.11962/1006-4990.2019-0159
Spherical magnesium oxide（MgO） was prepared by aerosol-assisted method using MgCl2·6H2O as the magnesium source and urea as the precipitant.Precursor particles and MgO samples synthesized at different reaction temperatures were studied by means of X-ray diffraction（XRD）,scanning electron microscopy（SEM）,infrared spectroscopy（IR） and nitrogen adsorption-desorption.The experimental results indicated that the prepared spherical MgO had a specific surface area of 36 m 2/g,an average pore diameter of 34 nm and a total pore volume of 0.26 cm 3/g.The adsorption of Congo red accorded with pseudo-secondary kinetics and reached adsorption equilibrium within 5 min.The adsorption isotherm conformed to the Langmuir model and the saturated adsorption capacity was 764.91 mg/g.
Key words： spherical magnesium oxide; aerosol; adsorption
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