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Investigation of the TiO2/PPV nanocomposite for gas sensing applications

机译:TiO2 / PPV纳米复合材料在气体传感应用中的研究

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It is well established that the dispersion of nanosized metal particles in a polymer matrix can induce nonlinear optical properties, yet very little is known about the effect of semiconducting transition metal oxide nanoparticles on luminescence properties of conjugated polymers. In this paper, we report the synthesis of a nanostructured TiO2/poly(p-phenylenevinylene) (PPV) system and show by diffuse reflectance infrared Fourier transform spectrometry that a stable conjugated nanocomposite is obtained. Investigation of the photoluminescence (PL) properties reveals both a broadening and a blueshift of the emission spectra. Adsorption of oxygen is found to be stronger on the nanocomposite than on PPV and to reversibly quench the PL emission, thus suggesting enhanced gas sensing properties. A tentative mechanism explaining the role of n-TiO2 is briefly discussed. [References: 8]
机译:公认的是,纳米尺寸的金属颗粒在聚合物基质中的分散可以诱导非线性光学性质,但是关于半导体过渡金属氧化物纳米颗粒对共轭聚合物的发光性质的影响知之甚少。在本文中,我们报告了纳米结构的TiO2 /聚(对苯撑亚乙烯基)(PPV)系统的合成,并通过漫反射红外傅里叶变换光谱法表明获得了稳定的共轭纳米复合材料。对光致发光(PL)特性的研究揭示了发射光谱的变宽和蓝移。发现在纳米复合材料上,氧的吸附比在PPV上强,并且可逆地淬灭PL发射,因此表明增强了气体感应性能。简要讨论了解释n-TiO2作用的初步机制。 [参考:8]

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