Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
596599 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2008 | 5 Pages |
Abstract
NiO-coated nano-fibriform silica (NFS) was prepared by an excessive soakage method and was characterized using transmission electron microscopy, X-ray diffraction, and physical N2 adsorption techniques under different conditions. The results demonstrate that the coated NiO is of a cubic crystal form. The best preparation conditions are incubation in a water bath at 95 °C for 2 h and drying at 45 °C for 17 h, which lead to a higher NFS utilization ratio and thus lower cost, and a well-distributed NiO coating on the carrier NFS. Nitrogen adsorption isotherms for NiO-coated NFS are similar to a type IV curve, with a specific surface area of 292.7 m2/g, adsorptive capacity of 379.2 cm3/g, and pore volume of 0.59 cm3/g. The average pore diameter of NiO-coated NFS is 8.01 nm, but most pore diameters are in the range 2.1-3.9 nm. Comparison of NiO-coated NFS and NiO(Ni)-coated sol-gel silica as catalysts reveals that NiO-coated NFS may be an effective catalyst and that NFS may be a good catalyst carrier.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Xuejun Li, Zhiyong Xiao, Anhuai Lu, Lijuan Wang, Xihui Ouyang, Junhong Ma, Yuanyuan Li,