Effect of Non-ionic Surfactant on Optical Properties and Electrical Conductivity of Modified MWCNT/CuO Nanocomposites

Öz

The effect of using polyethylene glycol (PEG) nonionic surfactant with different derivatives (polyethylene glycol methyl ether methacrylate) (PEGMEMA) and molecular weights (Mw: 200, 2000 and 5000) on the structural and optical properties of previously synthesized CuO nanoparticles and MWCNT/CuO nanocomposites was extensively investigated via X -ray diffraction (XRD), Energy Dispersion X-Ray analysis (EDS) and UV-vis spectroscopy. The electrical conductivity of these samples was measured using the two-point probe technique. From the X-ray diffraction spectroscopy data of the samples, it was determined that CuO nanoparticles and MWCNT/CuO nanocomposites had crystallinity of 36.7-44.6% and 19.9-20.7%, respectively. UV-vis spectrophotometer measurements showed that CuO nanoparticles and MWCNT/CuO nanocomposites had high energy band gaps in the range of 4.24-4.31 eV and 4.24-4.35 eV, respectively, with the use of non-ionic surfactant. It can be said that the electrical conductivity values of CuO nanoparticles and MWCNT/CuO nanocomposites were significantly improved by using PEGMEMA from 3.75 x10-5 to 7.93 x10-5 S/cm and from 55.75 to 86.25 S/cm, respectively.

Anahtar Kelimeler

• CuO
• Electrical Conductivity
• Energy band gap
• Encapsulation
• Crystallinity
• MWCNT

Modifiye MWCNT/CuO Nanokompozitlerinin Optik Özellikleri ve Elektriksel İletkenlikleri Üzerine Non-iyonik Sürfektanın Etkisi

Öz

Önceden sentezlenen CuO nanoparçacıklarının ve MWCNT/CuO nanokompozitlerinin yapısal ve optik özellikleri üzerine farklı türev (polietilen glikol metil eter metakrilat) (PEGMEMA) ve moleküler ağırlıklara (Mw: 200, 2000 ve 5000) sahip polietilen glikol (PEG) noniyonik sürfektan kullanılmasının etkisi, X-ışını kırınımı (XRD), Enerji Dağılım X-Işınları analizi (EDS) ve UV-vis spektrofotometre ile kapsamlı bir şekilde araştırıldı. Bu örneklerin elektriksel iletkenlikleri iki nokta prob tekniği kullanılarak ölçüldü. Örneklerin X-ışını kırınım spektroskopisi verilerinden CuO nanoparçacıklarının ve MWCNT/CuO nanokompozitlerinin sırasıyla %36,7-44,6 ve %19,9-20,7 kristaliniteye sahip oldukları belirlendi. UV-vis spektrofotometre ölçümleri, non iyonik sürfektan kullanılması ile CuO nanoparçacıklarının ve MWCNT/CuO nanokompozitlerinin sırasıyla 4,24-4,31 eV ve 4,24-4,35 eV aralıklarında yüksek enerji bant aralıklarına sahip olduklarını göstermektedir. PEGMEMA kullanılması ile CuO nanoparçacıklarının ve MWCNT/CuO nanokompozitlerinin elektriksel iletkenlik değerleri sırasıyla 3,75 x10-5'den 7,93 x10-5 S/cm'e ve 55,75'den 86,25 S/cm'e arttırılarak önemli ölçüde iyileştirildiği söylenebilir.

Anahtar Kelimeler

• CuO
• Eleketriksel İletkenlik
• Enerji bant aralığı
• Enkapsülasyon
• Kristalinite
• MWCNT

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