奈米複合材料PANI/TiO2之電性分析

Electrical Characteristics of PANI/TiO2 Nanocomposites

孫海濤(Hai-Tow Sun)

指導教授 ： 許經夌

中原大學/理學院/應用物理研究所/碩士(2007年)

https://doi.org/10.6840/cycu200700671

摘要

摘要
我們對聚苯胺(PANI)/TiO2複合材料做電性研究。經由直流電量測，電壓範圍介於10V~-10V間，觀察樣品壓成錠後之電性變化。經過熱退火後的樣品，在溫度量測範圍20K~300K之間，可發現導電率有明顯的提升。而熱退火超過了573K後導電率開始下降。在此研究實驗中，我們使用Mott 可變程跳躍(VRH)及空間電荷限制電流(SCLC)模型來解釋樣品的電流傳輸行為。
透過掃描式電子顯微鏡(SEM)，傅立葉紅外線光譜(FTIR)分析。我們發現樣品(PANI/TiO2)中PANI的特性在473K時開始分解熔化，到了643K時將會完全碳化。由光激螢光(PL)光譜分析中觀察可以知道，PANI加入TiO2可能有助於樣品PL效率提升。

關鍵字

可變程跳躍 ； 二氧化鈦 ； 空間電荷限制電流 ； 聚苯胺

並列摘要

Abstract
In this thesis electrical characteristics of polyaniline (PANI)/photocatalyst TiO2 nanocomposites are studied. We measured sample ingots by direct current from 10 V to -10 V to study the electrical characteristics of PANI/TiO2 nanocomposites. After annealing process, the conductivity of the sample is promoted obviously in the temperature range from 20 K to 300 K. When the annealing temperature is over 573 K, the conductivity of the sample starts to decrease. In this case we quote the model of Mott variable range hopping (VRH) and space charge limited conduction (SCLC) to explain the electron transport behavior of the sample. In the result of scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) analysis, we believe that PANI starts to melt at 473 K and becomes carbonizated completely over 643 K. Furthermore, We find that PANI doped with TiO2 may improve the sample photoluminescence (PL) efficiency by spectroscopy analysis.

並列關鍵字

PL ； SCLC ； TIO2 ； PANI ； VRH

參考文獻

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