紫外光诱导聚苯胺纳米复合材料的固相光降解

2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP) Pub Date : 2017-09-01 DOI:10.1109/NAP.2017.8190257

S. Mikhaylov, A. Pud, J. Wojkiewicz, P. Coddeville

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引用次数: 1

摘要

在不同金属氧化物纳米粒子(金红石型和锐钛矿型的二氧化钛，SnO2)的存在下，通过苯胺的化学氧化聚合制备了杂化聚苯胺(PANI)纳米复合材料。研究了近紫外光对合成材料性能的影响以及聚合物相光催化降解的可能性。具体来说，我们通过紫外可见光谱、热重分析和电导率测量研究了紫外辐照前后纳米复合材料的性能。所得结果表明，合成材料的固态光降解取决于聚苯胺LUMO与金属氧化物导电带之间的能隙。基于聚苯胺的敏化作用，提出了一种可能的光降解机理。

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UV-light induced solid-phase photodegradation in PANI nanocomposites

Hybrid polyaniline (PANI) nanocomposites were prepared by chemical oxidative polymerization of aniline in the presence of different metal oxide nanoparticles (TiO2 in rutile and anatase forms, SnO2). Influence of the near ultraviolet (UV) light on synthesized materials properties and possibility of polymer phase photocatalytic degradation were investigated. Specifically, we have studied the nanocomposites' properties before and after the UV exposition by UV-Vis spectroscopy, thermogravimetric analysis and conductivity measurements. The obtained results suggest that synthesized materials undergo solid-state photodegradation depending on the energy gap between PANI LUMO and metal oxides conduction band. A possible photodegradation mechanism based on the sensitizing effect by PANI is proposed.

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2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)

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