Bu çalışmada, kimyasal buhar çöktürme metodu (CVD) ile sentezlenen karbon nanotüpler (KNT) titanyum dioksit (TiO2) matrisi içerisine ağırlıkça %0.1, 0.2, 1 ve 2 oranlarında takviye edilmişlerdir. Elde edilen numunelerin yapısal karakterizasyonu Taramalı elektron mikroskobu (SEM) kullanılarak yapılmıştır. Numunelerin sıcaklığa bağlı elektriksel iletkenlikleri ölçülmüştür. UV-VIS spektrometresi kullanılarak optik özellikleri tespit edilmiştir. Kompozitteki karbon nanotüp miktarının artışı gerek oda sıcaklığında gerekse artan sıcaklıklarda elektriksel iletkenliğin artmasına neden olmuştur. Ayrıca, KNT'ler TiO2'in UV ışınlarını absorbe etme özelliğini arttırmış, yasak enerji aralığının (Eg) azalmasına sebep olmuştur. In this study, Carbon Nanotubes (CNT) synthesized with Chemical Vapour Deposition (CVD) were reinforced with 0.1, 0.2, 1 and 2% weight in Titanium dioxide (TiO2). Structural characterization of samples was analyzed by Scanning Electron Microscope (SEM). Electrical conductivities of samples, based on temperature, were surveyed. Optical properties were determined using UV-VIS spectrometer. Increase in CNT rate in composites caused electrical conductivity both room and rising temperature. Furthermore, CNT caused the increases in ability of TiO2's to absorb UV beam, and the reduces on forbidden energy gap (Eg).
In this study, carbon nanotubes, which were produced by using chemical vapour deposition and mechano-thermal methods, were combined with zinc oxide matrix at different ratios and the effects of the nanotubes on electrical and optical properties of zinc oxide were examined. It was observed that electrical conductivity of zinc oxide at room temperature increased with the increase in the reinforcement rate both in carbon nanotube reinforced samples produced by using chemical vapour deposition and those produced by using the mechano-thermal method. Carbon nano-tube reinforced samples produced by using chemical vapour deposition yielded relatively better results for the same reinforcement rate.
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