The influence of SiO2 doping on the microstructure and photochromic behavior of phosphomolybdic acid/polyvinyl pyrrolidone hybrid films

作者：Dong, Qi; Wang, Xiang-Yu; Lu, Ya-Mei; Sun, Hai-Yan; Meng, Qing-Ling; Liu, Su-Ling; Feng, Wei^*; Han, Xiang-Kui

来源：Journal of Molecular Structure, 2014, 1075: 154-158.

DOI：10.1016/j.molstruc.2014.07.003

• Phosphomolybdic acid
• Polyvinyl pyrrolidone
• SiO2 doping
• Hybrid films
• Photochromism

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.

• 出版日期2014-10-5
• 单位大连理工大学; 吉林大学