Preparation of nanomaterials having unique microstructure by using nanoreactor

纳米材料不同于块状材料，具有极高的比表面积、表面特性和量子效应，因此备受关注。以多孔载体为纳米反应器，采用快闪热解和气相水解法制备了固定化金属氧化物纳米颗粒。反应物蒸汽被吸附在载体上，然后在快速加热或暴露于水蒸气时形成产物。利用这种简单的方法，成功地制备了钛、钒、氧化铑和氧化铂纳米结构，并在载体材料中具有高产率、高负载和良好分散的特点。

Nanomaterials draw much attention owing to extremely high specific surface area as well as surface properties and quantum effects unlike bulk materials. Immobilized metal (oxides) nanoparticles on porous carriers were prepared by flash pyrolysis and gas-phase hydrolysis by using the carrier pores as a kind of nanoreactor. Reactant vapor was adsorbed on the carrier and then formed the product upon rapid heating or exposure to water vapor. With this facile method, titania, vanadia, rhodium (oxide), and platinum (oxide) nanostructures were successfully prepared at high yields, high loadings, and good dispersion in the carrier material.