Enhanced photocatalytic activity of electrochemically synthesized aluminum oxide nanoparticles

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• 作者：Deepak Pathania ; Rishu Katwal ; Harpreet Kaur
• 关键词：aluminum oxide ; nanoparticles ; electrochemical preparation ; photocatalysis
• 刊名：International Journal of Minerals, Metallurgy, and Materials
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：23
• 期：3
• 页码：358-371
• 全文大小：6,673 KB
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• 作者单位：Deepak Pathania (1)
  Rishu Katwal (1)
  Harpreet Kaur (2)
  
  1. School of Chemistry, Shoolini University, Solan, 173212 (H.P.), India
  2. Department of Chemistry, Punjabi University, Patiala, 147002 (Punjab), India
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science
  Metallic Materials
  Mineral Resources
  
• 出版者：Journal Publishing Center of University of Science and Technology Beijing, in co-publication with Sp
• ISSN：1869-103X

文摘

In this study, aluminum oxide (Al₂O₃) nanoparticles (NPs) were synthesized via an electrochemical method. The effects of reaction parameters such as supporting electrolytes, solvent, current and electrolysis time on the shape and size of the resulting NPs were investigated. The Al₂O₃ NPs were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, thermogravimetric analysis/differential thermal analysis, energy-dispersive X-ray analysis, and ultraviolet–visible spectroscopy. Moreover, the Al₂O₃ NPs were explored for photocatalytic degradation of malachite green (MG) dye under sunlight irradiation via two processes: adsorption followed by photocatalysis; coupled adsorption and photocatalysis. The coupled process exhibited a higher photodegradation efficiency (45%) compared to adsorption followed by photocatalysis (32%). The obtained kinetic data was well fitted using a pseudo-first-order model for MG degradation.