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《Journal of Chongqing University of Technology(Natural Science)》 2015-11
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Synthesis of Hollow Ellipsoid-Like Hierarchical γ-Al OOH via Template-Free Hydrothermal Method and Its Adsorption Properties

LI Xiu-xia;GUO Xiao-rui;LIANG Qi;MENG Fan-cheng;Collge of Materials Science & Engineering,Chongqing University of Technology;Chongqing Municipal Engineering Research Center of Institutions of Higher Education for Special Welding Materials and Technology;  
Ellipsoid-like hierarchical γ-Al OOH materials were prepared by a template-free hydrothermal method by using aluminum nitrate( Al( NO3)3·9H2O) as aluminum source and Na2C2O3 as precipitating agent. The obtained samples were characterized by X-ray powder diffraction( XRD),scanning electron microscopy( SEM),transmission electron microscopy( TEM) and N2 adsorption /desorption technique. The possible formation mechanism of the ellipsoid-like hierarchical γ-Al OOH was proposed based on the experimental results. In addition,the adsorption performance of hierarchical γ-Al OOH for Congo red was studied. The experiment results show that the micro-morphology of γ-Al OOH and phase change is controlled by the adding amount of Na2C2O3. When Na2C2O3was2 mmol,the ellipsoid-like hierarchical γ-Al OOH is obtained with an average length of 1. 7-2. 2um and width of 0. 8-1. 0um,which is assembled by thin nanosheet and exhibited a BET surface area of147. 45 m2/ g and a most probable pore size of 3. 5 nm. Meanwhile,the hierarchical γ-Al OOH shows a maximum adsorption capacity for Congo red( CR) of 99 mg / g.
【Fund】: 国家自然科学基金资助项目(51102289);; 材料复合新技术国家重点实验室(武汉理工大学)开放基金资助项目(2015-KF-15)
【CateGory Index】: TQ133.1
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