| abstract |
The present invention discloses a particulate material comprising an aluminum-containing material and a silica dopant. The particulate material includes crystallite particles having a crystallite size of less than about 10 nm. The crystallite particles are stacked together to form primary particles having a primary particle size of less than about 500 nm. The primary particles aggregate together to form secondary particles having a secondary particle size greater than about 1 μm. The average pore diameter of the particulate material is not less than 8 nm. |