Indexed by:期刊论文

Date of Publication:2008-07-01

Journal:JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A

Included Journals:SCIE、EI、ISTIC、CSCD

Volume:9

Issue:7

Page Number:981-987

ISSN No.:1673-565X

Key Words:chemical vapor deposition (CVD); porous material; activated carbon fiber (ACF)

Abstract:TiO2 fibers were prepared via alternatively introducing water vapor and Ti precursor carried by N-2 to an APCVD (chemical vapor deposition under atmospheric pressure) reactor at <= 200 degrees C. Activated carbon fibers (ACFs) were used as templates for deposition and later removed by calcinations. The obtained catalysts were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer, Emmett and Teller (BET) and X-ray diffraction (XRD) analysis. The pores within TiO2 fibers included micro-range and meso-range, e.g., 7 nm, and the specific surface areas for TiO2 fibers were 141 m(2)/g and 148 m(2)/g for samples deposited at 100 degrees C and 200 degrees C (using ACF1700 as template), respectively. The deposition temperature significantly influenced TiO2 morphology. The special advantages of this technique for preparing porous nano-material include no consumption of organic solvent in the process and easy control of deposition conditions and speeds.