title: Photochromism-based detection of volatile organic compounds by W-doped TiO2 nanofibers.
abstract: W-doped TiO(2) nanofibers with various compositions (W/Ti: 2-8%) were fabricated by the electrospinning method from respective precursor solutions containing tungsten(V) pentaethoxide, titanium tetraisopropoxide (TTIP), and polyvinylpyrrolidone (PVP), followed with calcination at 550 °C. Morphological and structural characteristics of these nanofibers were studied with SEM, XRD and XPS. W-doping inhibited the crystal growth and anatase-to-rutile transformation of TiO(2) nanofibers. W-doped TiO(2) nanofiber mats showed good photocatalytic oxidation abilities for acetone. Obvious color change from white to blue of mats during the photocatalysis process can be detected by naked eyes, which provides a good way in detection of pollutants in indoor air, especially for the volatile organic compounds (VOCs).
authors: Institute of Functional Polymer Materials, School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, PR China. mingjin@tongji.edu.cn
authors: Ming
authors: M
authors: Jin
authors: Xintong
authors: X
authors: Zhang
authors: Hongting
authors: H
authors: Pu
authors: Shunsuke
authors: S
authors: Nishimoto
authors: Taketoshi
authors: T
authors: Murakami
authors: Akira
authors: A
authors: Fujishima
mesh_terms: D057139:Nanofibers / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D055668:Photochemical Processes; D013056:Spectrophotometry, Ultraviolet; D014025:Titanium / Q000737:chemistry*; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D055549:Volatile Organic Compounds; C009495:titanium dioxide; D014025:Titanium