在由机械研磨2 h的 Al 粉经超声波作用下发生水解反应、干燥、焙烧后制备 Al2 O3的过程中,用蔗糖、研磨13 h 的 Zn 粉和 Ag＋分别作为辅助剂制得具有高比表面积的γ-Al2 O3,并考察改性后对γ-Al2 O3织构的影响。采用X射线衍射仪(XRD)、场发射扫描电子显微镜(SEM)和比表面测定(BET)等技术对介孔纳米γ-Al2 O3样品进行表征。结果表明,γ-Al2 O3不但具有高的比表面积,而且孔径分布较为集中。通过改变蔗糖的用量、Zn 粉纳米颗粒和 Ag＋,在一定程度上对γ-Al2 O3的比表面积和孔结构等进行调控。
Mesoporous nanostucturalγ-Al2 O3 was prepared from aluminum nanoparticles with sucrose,Zn pow-der grinded and Ag+ respectively as auxiliary agent by precipitation with the aid of ultrasonic dispersion,dr-ying,calcination.Textural Properties of the modificationγ-Al2 O3 was explored.Theγ-Al2 O3 were characterized by XRD,SEM and BET.The result indicated that,a novel and simple method using sucrose Zn powder grinded and Ag+ as assistant agent was developed to prepareγ-Al2 O3 with high surface area and narrow pore size distri-bution.
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