Open AccessAdsorptive properties of metal oxide dispersed carbon materials and characterization of metal oxide fine particles by XAFS
Author(s) -
Hattori Yoshiyuki,
Kaneko Katsumi
Publication year - 2001
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049500016691
Subject(s) - non blocking i/o , x ray absorption fine structure , materials science , microporous material , nickel oxide , adsorption , chemical engineering , oxide , activated carbon , metal , carbon fibers , supercritical fluid , inorganic chemistry , composite material , chemistry , metallurgy , catalysis , spectroscopy , organic chemistry , composite number , physics , quantum mechanics , engineering
Surface modification of activated carbon fiber (ACF) with metal oxide increases the adsorptivity of the ACF for supercritical gas such as NO and CH 4 . In this study, pitch‐based activated carbon fibers (P20) were modified with nickel oxide particles. The adsorptive properties and micropore structures of NiO dispersed P20 (NiO‐P20) were investigated by nitrogen adsorption isotherms at 77 K. The isotherm was of type I, suggesting that the NiO‐P20 has microporosity. The micropore volume and surface area for NiO‐dispersed P20 were smaller than that of P20 by about 15%. The Ni K ‐edge X‐ray absorption fine structure of NiO‐P20 has been investigated in order to characterize the species dispersed on P20. The local structure of the NiO particles on the P20 showed some different features compared with the local structure of powdered NiO.