| Summary: | 碩士 === 中原大學 === 應用物理研究所 === 95 === 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.
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