Electrical, magnetic and photoelectrochemical activity of rGO/MgFe₂O₄ nanocomposites under visible light irradiation

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• 作者：Noor-ul Ain^a ; Wajeeha Shaheen^a ; Bushra Bashir^a ; Naser M. Abdelsalam^b ; Muhammad Farooq Warsi^a ; ^{Farooq.warsi@iub.edu.pk" class="auth_mail" title="E-mail the corresponding author} ; Muhammad Azhar Khan^c ; Muhammad Shahid^a ; ^{shahid@iub.edu.pk" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Graphene ; Nanocomposite ; Magnetic material ; Photocatalyst ; Water splitting ; Visible light
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：1 August 2016
• 年：2016
• 卷：42
• 期：10
• 页码：12401-12408
• 全文大小：1280 K

文摘

Magnetically separable rGO/MgFe₂O₄ nanocomposites having favorable photocatalytic activity were prepared by one step hydrothermal method. X-ray diffraction, Fourier transform infrared spectroscopy and raman analysis confirmed the spinel structure of magnesium ferrite nanoparticles. The UV–visible measurements indicated that the rGO/MgFe₂O₄ photocatalyst exhibits the strong visible absorption. Two probe electrical conductivity (I-V) measurements exhibited the higher conductivity of rGO/MgFe₂O₄ nanocomposite relative to MgFe₂O₄ nanoparticles. The magnetic measurements showed that the rGO/MgFe₂O₄ nanocomposite could be collected from water when an external magnetic field is applied. The photocatalytic studies were carried out by taking methylene blue as model organic compound under visible light irradiation. The photo-electrochemical (PEC) water splitting properties of the rGO/MgFe₂O₄ nanocomposite exhibited higher PEC performance compared to MgFe₂O₄ nanoparticles owing to the suppression of charge recombination. The results showed that nanocomposite can be used as photocatalysts for degradation of organic compounds in the polluted water.