Facile synthesis of mesoporous Si-containing γ-Al2O3 nanofiber with enhanced thermal stability

Abstract

Mesoporous γ-Al 2 O 3 nanofiber was prepared via a simple reverse precipitation route using Si-containing Al(OH) 3 and HNO 3 as raw materials. The resultant Si-containing mesoporous γ-Al 2 O 3 nanofiber exhibited high surface area of 320 m 2 /g, large pore volume of 1.17 cm 3 /g and large pore size of 10.5 nm. The introduction of Si element remarkably enhanced the thermal stability of mesoporous γ-Al 2 O 3 . The as-prepared nanofiber could maintain relative high surface area(110 m 2 /g) and pore volume(0.73 cm 3 /g) up to 1100 °C. The effects of various experimental conditions, such as pH value, reaction temperature and aging temperature on the structural properties of the mesoporous γ-Al 2 O 3 were also investigated.

Macrolactonization of methyl 15-hydroxypentadecanoate to cyclopentadecanolide using KF-La/γ-Al 2 O 3 catalyst

“…Among various supports, γ-Al 2 O 3 has attracted significant attention among researchers as a mesoporous material [58,59] owing to its large specific surface area, favourable dispersibility, thermostability [60] and high catalytic performance [61,62]. The addition of La is known to stabilize alumina for high temperature applications and Lanthanum acts as a promoter in combination with Al 2 O 3 to render the solid strongly basic [63,64].…”