Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-10-05

Journal: JOURNAL OF MOLECULAR STRUCTURE

Included Journals: Scopus、EI、SCIE

Volume: 1075

Page Number: 154-158

ISSN: 0022-2860

Key Words: Phosphomolybdic acid; Polyvinyl pyrrolidone; SiO2 doping; Hybrid films; Photochromism

Abstract: New hybrid films were synthesized by SiO2 doping into phosphomolybdic acid (PMoA)/polyvinyl pyrrolidone (PVPd) composite system, and the effect of SiO2 doping on microstructure and photochromic properties was studied via atomic force microscope (AFM), Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible spectra (UV-vis) and X-ray photoelectron spectroscopy (XPS). The hybrid film surface with dome projection changed rough from smooth after SiO2 doping. The vibrational spectra of FT-IR verified that component of the heteropolyacids and the polymer did not changed, the vibration bands were expanded and had shifted by a few cm(-1), and changed interaction between the acid and the polymer after SiO2 doping. The hybrid film exhibited a good photochromic property, which changed from colorless to blue under UV irradiation. The color change intensity of SiO2/PMoA/PVPd film was 1.48 times stronger than that of PMoA/PVPd under the same condition. XPS results indicated that the amount of PMoA in photo-reductive reaction was increased after SiO2 doping. (C) 2014 Elsevier B.V. All rights reserved.