CdSO4-CdS Composite nanowires synthesized by arc discharge method

Abstract

Herein, we successfully carried out the of CdS nanowires doped with CdSO4 nanoparticles by arc discharge method. For this, two cadmium rods with high purity as anode and cathode electrodes were submerged in a liquid nitrogen medium. The cathode electrode was filled with micro-sized sulfur powder to synthesize CdS nanowires. CdS nanowires were obtained by oxidation using low temperature with CdSO4 nanoparticles. After the arc discharge process, the resultant product was characterized to reveal structural and morphological properties. XRD and electron EDX analyses exposed the coexistence of the CdS and CdSO4 phases. Scanning electron microscopy (SEM) investigations revealed that the synthesized nanostructures formed in a 1D wire nanostructure morphology with a diameter of less than 10 nm and several micrometers in length. Besides, the transmission electron microscopy (TEM) analysis was utilized to monitor the CdSO4 nanoparticles located on CdS nanowires surface. It has been found that the absorption band blue-shifted with 0.53 eV. This blue shift originated from the quantum confinement in the nanoparticles.

Keywords

• CdS
• Nanowire
• Arc-discharge
• Photoluminescence

CdSO4-CdS Kompozit nanotellerin ark deşarj yöntemi ile sentezi

Öz

Bu çalışmada, CdSO4 nanopartikülleri ile doplanmış CdS nanotellerinin sentezini ark deşarj yöntemi ile başarıyla gerçekleştirdik. Bunun için anot ve katot elektrotlar olarak yüksek saflıkta iki kadmiyum çubuk sıvı nitrojen ortamına daldırıldı. Katot elektrotu, CdS nanotellerini sentezlemek için mikro boyutlu kükürt tozu ile doldurulmuştur. CdS nanotelleri düşük sıcaklıkta oksitleme işlemi ile CdSO4 nanoparçacıkları da elde edildi. Ark deşarj işleminden sonra, elde edilen ürün yapısal ve morfolojik özellikleri ortaya çıkarmak için karakterize edildi. X-Işını Kırınımı (XRD) ve elektron dağılımı spektroskopi (EDS) analizleri, CdS ve CdSO4 fazlarının bir arada varlığını açıkça ortaya koymuştur. Taramalı elektron mikroskobu (SEM) incelemeleri, sentezlenmiş nanoyapıların 10 nm'den küçük bir çapa ve birkaç mikrometre uzunluğa sahip bir 1B tel nanoyapı morfolojisinde oluştuğunu ortaya çıkardı. Ayrıca, geçirimli elektron mikroskobu (TEM) analizi, CdS nanotellerinin yüzeyinde bulunan CdSO4 nanopartiküllerini izlemek için kullanıldı. Absorpsiyon bandının maviye kaydığı 0.53 eV ile bulunmuştur. Bu maviye kayma, nanopartiküllerdeki kuantum sınırlamasından kaynaklandı.

Anahtar Kelimeler

• CdS
• Nanotel
• Ark deşarj
• Fotolüminesans

Kaynakça

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