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论文类型：期刊论文

发表时间：2014-10-05

发表刊物：JOURNAL OF MOLECULAR STRUCTURE

收录刊物：SCIE、EI、Scopus

卷号：1075

页面范围：154-158

ISSN号：0022-2860

关键字：Phosphomolybdic acid; Polyvinyl pyrrolidone; SiO2 doping; Hybrid films; Photochromism

摘要：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.