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In 2 O 3 Nanofibers and Nanoribbons: Preparation by Electrospinning and Their Formaldehyde Gas‐Sensing Properties
Author(s) -
Li Zhipeng,
Fan Yingju,
Zhan Jinhua
Publication year - 2010
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201000313
Subject(s) - nanofiber , electrospinning , evaporation , nanotechnology , formaldehyde , chemistry , chemical engineering , solvent , materials science , polymer , organic chemistry , physics , engineering , thermodynamics
In 2 O 3 nanofibers and nanoribbons were prepared by electrospinning combined with a poly(vinyl pyrrolidone)‐assisted sol–gel technique. By tuning the experimental parameters, the morphological transformation of In 2 O 3 from nanofibers to nanoribbons was achieved. It was found that both the rapid evaporation of solvent and the concentration of the precursor played important roles in the formation process of In 2 O 3 nanoribbons. The average diameter of the In 2 O 3 nanofibers is 180 nm. The nanoribbons have an average width of 1 μm and a thickness of about 150 nm. The lengths of both can reach millimeters. The average grain size consisting of nanofibers and nanoribbons is 18.6 and 11.2 nm, respectively. The gas‐sensing properties of In 2 O 3 nanofibers and nanoribbons toward formaldehyde vapor were investigated. Interestingly, the gas sensor fabricated with In 2 O 3 nanoribbons exhibited a higher and faster response at a relatively lower operating temperature than that fabricated with nanofibers.