物理化学学报Issue(9)：1815-1822,8.DOI:10.3866/PKU.WHXB201507201
分级多孔γ-Al2O3空心微球微波水热法制备及其对刚果红的快速吸附
Fast Adsorption Removal of Congo Red on Hierarchically Porousγ-Al2O3 Hollow Microspheres Prepared by Microwave-Assisted Hydrothermal Method
摘要
Abstract
Hierarchical nanostructuredγ-Al2O3 hollow microspheres were synthesized from KAl(SO4)2 and urea precursors by the microwave-assisted hydrothermal (MAH) method at 180 °C for 20 min followed by calcination at 600 °C for 2 h. The as-prepared sample was used to remove the organic dye Congo red (CR) from aqueous solution. The results showed that the obtainedγ-Al2O3 hollow microspheres are about 0.8–1.0 μm in diameter with a shell thickness of approximately 200 nm. Theγ-Al2O3 hollow microspheres have a high surface area of 243 m2g–1 and a hierarchical meso-macroporous structure, which is beneficial for mass transfer in liquid processes. Therefore, the preparedγ-Al2O3 hollow microspheres exhibit faster adsorption and enhanced adsorption performance for CR than particles prepared by the hydrothermal method and commercialγ-Al2O3. The adsorption kinetic data follow the pseudo-second-order equation and the equilibrium data fit well to the Langmuir model. The maximum adsorption capacity (qmax) of the obtainedγ-Al2O3 hollow microspheres calculated by the Langmuir model is up to 515.4 mgg–1 at 25 °C. Theγ-Al2O3 hollow microspheres prepared by the microwave-assisted hydrotherm method show promise as an adsorbent for environmental applications due to their hierarchical porous structure, high surface area, large pore volume, and adsorption capacity.关键词
分级多孔材料/γ-Al2O3/刚果红/吸附动力学Key words
Hierarchicaly porous material/γ-Al2O3/Congo red/Adsorption kinetics分类
化学化工引用本文复制引用
聂龙辉,谭侨,朱玮,魏琪,林志奎..分级多孔γ-Al2O3空心微球微波水热法制备及其对刚果红的快速吸附[J].物理化学学报,2015,(9):1815-1822,8.基金项目
The project was supported by the National Natural Science Foundation of China (51572074), Natural Science Foundation of Hubei Province, China (2011CDB079), Hubei College Student Innovation Training Project, China (201310500017), and Open Fund of Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-Central University for Nationalities, China (CHCL12003)国家自然科学基金(51572074),湖北省自然科学基金(2011CDB079),湖北省大学生创新训练项目(201310500017)和中南民族大学催化与材料科学重点实验室开放基金(CHCL12003)资助 （51572074）
