Structural, spectral, dielectric and photocatalytic studies of Zr-Ni doped MnFe₂O₄ co-precipitated nanoparticles

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• 作者：Shahbaz Nazir^a ; Sumiyya Sami^a ; ^{somiasami377@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; Sajjad Haider^b ; Muhammad Shahid^a ; Muhammad Sher^c ; Muhammad Farooq Warsi^a ; Qaisar Nadeem^a ; Muhammad Azhar Khan^d ; ^{azhar.khan@iub.edu.pk" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Spinel ferrite ; Nanoparticles ; Ferrite/grapheme nanocomposite ; Photocatalysis ; Dielectric parameters
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：42
• 期：12
• 页码：13459-13463
• 全文大小：1687 K

文摘

In this study the Mn_1–2xZr_xFe_2−yNi_yO₄ nanoparticles fabricated by co-precipitation technique were investigated. Thermo-gravimetric analysis (TGA) exhibited the annealing temperature of the nanoparticles ~990 °C. Cubic spinel structure of Mn_1–2xZr_xFe_2−yNi_yO₄ nanoparticles was confirmed by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) analysis. Crystallite size was calculated by XRD data and found in the range of 32–58 nm. Photocatalytic activity of Mn_0.92Zr_0.04Fe_1.88Ni_0.12O₄/graphene nanocomposites was tested by degrading methylene blue (MB) under visible light irradiation. The MB was almost completely degraded in the presence of Mn_0.92Zr_0.04Fe_1.88Ni_0.12O₄-graphene nanocomposites under visible light irradiation. Dielectric parameters were also investigated in the frequency range 1×10⁶–3×10⁹ Hz. An overall decrease in the values of dielectric constant, dielectric loss and tangent loss was observed on account of the substitution of Zr and Ni with Mn and Fe cations.