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Catalytic Effects of High‐Valent Transition Metal Oxides on Different Carbonization Behaviours of Polyvinyl Alcohol
Author(s) -
Hu Qiao,
Liao JiaYing,
Yu Ran,
Tang ZhongFeng,
Chen ChunHua
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201701709
Subject(s) - carbonization , catalysis , polyvinyl alcohol , transition metal , raman spectroscopy , materials science , carbon fibers , metal , transmission electron microscopy , inorganic chemistry , infrared spectroscopy , chemical engineering , chemistry , scanning electron microscope , organic chemistry , nanotechnology , composite material , metallurgy , composite number , physics , engineering , optics
Four different high‐valent transition metal oxides (VO 2 , Nb 2 O 5 , Ta 2 O 5 and WO 3 ) are investigated for the catalytic effect on the carbonization of polyvinyl alcohol. X‐ray diffraction, infrared carbon‐sulfur analyzer, transmission electron microscopy and Raman spectroscopy are employed to study the compositions and structures of the residual carbon and resulted metal oxides. The roles of different high‐valent transition metal oxides and specific surface areas are discussed in the high temperature carbon thermal reduction process for the residue and form of carbon. It is found that VO 2 as the most effective catalyst and polyvinyl alcohol as the carbon source leads to the highest amount of carbon residue (21.34 wt%) and the lowest ratio of sp 3 to sp 2 (0.18).