OPTIMIZATION OF ZnO NANOPARTICLES PREPARED BY SOL-GEL TECHNIQUE

Abstract

Zinc oxide (ZnO) nanoparticles can potentially be applied to photo-catalysis, composite materials, chemical, gas, vapor, and humidity sensors and dye-sensitized solar cells due to their excellent optical, electrical, mechanical and chemical properties. The aim of this study was to synthesize ZnO nanoparticles by sol-gel technique and characterize them. ZnO nanoparticles were prepared from zinc acetate dihydrate and oxalic acid dihydrate precursors and ethyl alcohol solvent. The effects of process parameters such as the precursor solution molar concentration, pH and calcination temperatures on the size of the synthesized nanoparticles were investigated. Particle size of synthesized ZnOnanoparticles was determined by using a ZetaSizer instrument. Structural and chemical properties of synthesized ZnO nanoparticles were investigated by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) respectively. Results show that the lowest ZnO nanoparticles size obtained with precursor solution prepared at 0.005M and calcined at 400 °C

Keywords

• Nanoparticles, ZnO, Sol-gel

SOL-JEL YÖNTEMİ İLE HAZIRLANMIŞ ZnO NANOPARTİKÜLLERİN OPTİMİZASYONU

Abstract

Çinko oksit (ZnO) nanopartikülleri mükemmel optik, elektriksel, mekanik ve kimyasal özelliklerinden dolayı fotokatalize, kompozit malzemelere, kimyasal, gaz, buhar ve nem sensörlerine ve boyaya duyarlı güneş pillerine uygulanabilmektedir. Bu çalışmanın amacı, sol-jel yöntemiyle ZnO nanopartiküllerin sentezlenmesi ve karakterize edilmesidir. ZnO nanopartikülleri çinko asetat dihidrat ve oksalik asit dihidrat başlangıç kimyasalları ve etil alkol çözücüsü kullanılarak hazırlanmıştır. Başlangıç çözeltisi molar konsantrasyonu, pH ve kalsinasyon sıcaklığı gibi işlem parametrelerinin sentezlenen nanopartikül boyutu üzerine etkisi incelenmiştir. ZnO nanopartiküllerinin boyutu ZetaSizer cihazı kullanılarak belirlenmiştir. Sentezlenen ZnO nanopartiküllerinin yapısal ve kimyasal özellikleri X-Işını difraksiyonu (XRD) ve Fourier Dönüşümlü Kızılötesi Spektroskopisi (FTIR) ile belirlenmiştir. Elde edilen sonuçlar en düşük nanopartikül boyutunun başlangıç çözeltisinin 0,005M değerinde hazırlanması ve 400 °C sıcaklıkta kalsinasyon işlemine tabi tutulması sonucunda elde edildiğini göstermiştir.

Keywords

• Özet: Çinko oksit (ZnO) nanopartikülleri mükemmel optik, Nanopartiküller, ZnO, elektriksel, mekanik ve kimyasal özelliklerinden dolayı

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