%0 Journal Article
%T Porous Cube-like In2O3 Nanoparticles and Their Sensing Characteristics toward Ethanol<br>
%A Chih-Chia HUANG
%A Chen-Sheng YEH
%A <br>
%J 材料科学技术学报
%D 2008
%I 
%X Porous cube-like crystalline In2O3 nanoparticles with an average diagonal length of 34.8 nm were fabricated by a laser ablation-reflux process to form In(OH)3, followed by a calcination treatment to yield porous In2O3. HRTEM (high-resolution transmission electronic microscopy), XRD (X-ray diffraction), BET (Brunauer-Emmett-Teller), and XPS (X-ray photoelectron spectroscopy) analysis were used to characterize their crystalline structures, grain sizes, surface areas, and surface compositions. The as-prepared porous indium oxides were tested for their sensing properties toward ethanol. Non-porous In2O3 nanopowder (about 40 nm) was also examined in order to compare the results with the as-prepared porous In2O3 nanomaterials. The porous In2O3 exhibited much better performance than that of non-porosus In2O3, and showed enhanced sensitivity with a lower detection limit than other reported In2O3-based materials when exposed to ethanol. Good gas sensitivity and linear behavior as a function of ethanol concentration were observed in the porous In2O3 nanoparticles.
%K In2O3
%K Porosity
%K Nanoparticles
%K Gas sensor<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=A2B34121A283DA243F98F5FDB8025948&yid=67289AFF6305E306&vid=B91E8C6D6FE990DB&iid=E158A972A605785F&sid=06DAE5E1DF7D0B6A&eid=8B1FE194AD66DC3D&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=32