کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
691099 | 1460434 | 2014 | 5 صفحه PDF | دانلود رایگان |
• We have synthesized Li-, Na- and K-doped ZnO powders by sol–gel process.
• The synthesized samples were characterized by different techniques.
• The photocatalytic activity of materials was evaluated for the degradation of pNP.
• Our synthesized materials exhibit good photocatalytic activity.
In order to utilize visible light more efficiently in the field of photocatalysis, Li, Na and K-doped ZnO nanoparticles were prepared using a sol–gel method. The obtained samples were characterized by BET surface area measurements, X-ray diffraction, scanning electron microscopy and UV–vis analysis.The photocatalytic activity of the photocatalysts was evaluated for the degradation of p-nitrophenol (p-NP) under visible light irradiation. It has been observed that these photocatalysts could be a promising photocatalyst for degradation of organic molecules as compared to transition metal doped ZnO under visible light. Li-doped ZnO is the most active photocatalyst and shows high photocatalytic activity for the degradation of p-nitrophenol (p-NP). The enhanced photocatalytic activity of Li-doped ZnO is mainly due to the electron trapping by lithium metal ions, small particle size, large surface area, and high surface roughness of the photocatalysts.
Journal: Journal of the Taiwan Institute of Chemical Engineers - Volume 45, Issue 1, January 2014, Pages 249–253