化学学报 ›› 2001, Vol. 59 ›› Issue (12): 2076-2079. 上一篇    下一篇

研究论文

三氧化钼溶胶凝胶光致变色的研究

章俞之;黄银松;曹韫真;快素兰;胡行方   

  1. 中国科学院上海硅酸盐研究所.上海(200050);中国科学院特种无机材料研究发 展中心
  • 发布日期:2001-12-15

Photochromism of molybdenum trioxide sol and gel

Zhang Yuzhi;Huang Yinsong;Cao Yunzhen;Kuai Sulan;Hu Xingfang   

  1. Shanghai Inst Ceram., CAS.Shanghai(200050)
  • Published:2001-12-15

通过金属钼粉与过氧化氢溶液反应制备三氧化钼溶胶和凝胶,在高压汞灯的照射下,溶胶和凝胶由浅黄色变成蓝色。Raman光谱研究表明:通过紫外光照,MoO3凝胶结构进行了重整,呈有序排布。乙醇相的MoO3溶胶在紫外光照或长期自然光照下,均表现出光致变色特性。电子自旋共振(ESR)和X射线电子能谱(XPS)研究表明:空气中的MoO3经光照同时接受质子和电子后,生成了蓝色的钼青铜,其中Mo^6^+被还原成了Mo^5^+离子。

关键词: 三氧化钼, 溶胶-凝胶法, 光致变色, X射线光电子谱法, 电子自旋共振

Molybdenum trioxide sol and gel were prepared via reaction metal Mo powder with peroxo-hydrate solution and they could turn into blue color when irradiated by high pressure mercury lamp. Raman spectra show that the structrue of MoO3 sol-gel could be rearranged showing short-range order after UV irradiation. MoO3 sol-gel in ethanol could show photochromism by UV irradiation even only exposing in solar light for a long time. Electron spin resonance (ESR) and X-ray photoelectron spectrum (XPS) measurements at room temperatrue show MoO3 could form a blue colored bronze, and Mo^6^+ could be reduced to Mo^5^+ by light excitatio detected in photocolored gel in air.

Key words: MOLYBDENUM TRIOXIDE, SOL-GEL PROCESS, PHOTOCHROMISM, X- RAY PHOTOELECTRON SPECTROMETRY, ELECTRON SPIN RESONANCE

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