高比表面积介孔γ-Al_2O_3纳米颗粒的制备及其对Cl^-的吸附

Preparation ofmesoporous nanostuctural alumina particles with high surface area and adsorption behavior research to Cl^-

在干法室温常压状态下,利用滚压振动磨大批量制备尺度在50~80nm的铝纳米颗粒。铝纳米颗粒在超声波作用下发生水解反应、经干燥、焙烧后制备出具有纳米结构的介孔γ-Al2O3(比表面积高达406.9m2/g)。采用X射线衍射仪(XRD)、傅里叶变换红外光谱(FT-IR)、场发射扫描电子显微镜(SEM)、透射电子显微镜(TEM)和比表面测定(BET)等技术对介孔纳米γ-Al2O3样品进行表征。并取0.2g不同条件下制备的介孔纳米γ-Al2O3,考察其对Cl-的吸附性能。实验结果表明,所制备的介孔纳米γ-Al2O3具有高比表面积、孔径大小均匀和高温稳定性。在焙烧温度为400℃、保温4h的条件下制备的介孔纳米γ-Al2O3对Cl-的吸附效率最高,对Cl-的去除率为14.03%。

Aluminum nanoparticles （NPs）in large quantities were prepared via dry roller vibration milling at room temperature with the particle size between 50 and 80 nm.Mesoporous nanostucturalγ-Al2 O3 was prepared from aluminum nanoparticles（NPs）by precipitation with the aid of ultrasonic dispersion,drying,calcination and characterized by XRD,FT-IR,SEM,TEM and BET.The adsorption characterization of Cl- on the meso-porous nanostucturalγ-Al2 O3 powders was explored.The result indicated that,Mesoporous nanostucturalγ-Al2 O3 powders calcined at 400 ℃ for 4 h have been achieved with surface area 406.9 m2/g and has a better ad-sorption performance to the Cl-.