Elektrokimyasal Anotlama Yöntemiyle ZnO Nanotellerin Üretilmesi ve Fotokatalitik Aktiviteleri

Yıl 2019, Cilt: 21 Sayı: 61, 67 - 71, 15.01.2019

Ahmet Aykaç

Öz

Bu çalışmada ZnO nanoteller Zn plakalar üzerine
elektrokimyasal anotlama yöntemi ile iki farklı voltaj (5V-10V) kullanılarak
büyütülmüştür. Büyütme işleminin ardından kristalin çinko oksit fazı oluşturmak
amacıyla hava ortamında 300 °C ‘de 1 saat süreyle ısıl işleme tabi tutulmuştur.
Elde edilen yapıların morfolojik ve yapısal özellikleri sırasıyla taramalı
elektron mikroskobu (SEM) ve X-ışınları kırınım difraktometresi (XRD) ile
tespit edilmiştir.  Son olarak ZnO
nanotellerin fotokatalitik performansı sulu metilen mavisi çözeltileri üzerinde
test edilmiştir. Büyütülen yapılarda artan voltaj ile birlikte nano tel
oluşumunda artış gözlenmiştir. Anotlama ve ısıl işlem sonucunda elde edilen
yapının ZnO nanotel yapısında olduğu belirlenmiştir.  Fotokatalitik testler sonucunda 10V anotlama
voltajı ile büyütülen yapılarda parçalanma hızı 112x10^-3 sa^-1
olarak tespit edilmiştir. 

Anahtar Kelimeler

ZnO, Fotokatalitik, Elekrokimyasal Anotlama, Lambert-Beer

Production and Photocatalytic Activities of ZnO Nanowire by Electrochemical Anodization

Öz

In this study, ZnO nanowires were
grown on Zn sheet plates by electrochemical anodization using two different
voltages (5V-10V). Following the growth process, the materail was heat treated
at 300 ° C for 1 hour in the air to form the crystalline zinc oxide phase. The
morphological and structural properties of the obtained structures were
determined by scanning electron microscopy (SEM) and X-ray diffraction
diffractometry (XRD), respectively. Finally, the photocatalytic performance of
ZnO nanowires was tested on aqueous methylene blue solutions. An increase in
nanowire formation was observed with increased voltage in the grown structures.
It was determined that the structure obtained by anodizing and heat treatment
is in the ZnO nanowire structure. As a result of photocatalytic tests, The
highest photocatalytic degradation rate was determined as 112x10^-3
sa^-1 in the growth structures with 10V anodization voltage.

Anahtar Kelimeler

ZnO, Photocatalysis, Electrochemical Anodization, Lambert-Beer

Kaynakça

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