Synthesis of CaFe<sub>2</sub>O<sub>4</sub>-NGO Nanocomposite for Effective Removal of Heavy Metal Ion and Photocatalytic Degradation of Organic Pollutants
This paper reports the successful synthesis of magnetic nanocomposite of calcium ferrite with nitrogen doped graphene oxide (CaFe<sub>2</sub>O<sub>4</sub>-NGO) for the effective removal of Pb(II) ions and photocatalytic degradation of congo red and <i>p</i>-nitrop...
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MDPI AG
2021-06-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/6/1471 |
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| author | Manmeet Kaur Manpreet Kaur Dhanwinder Singh Aderbal C. Oliveira Vijayendra Kumar Garg Virender K. Sharma |
| author_facet | Manmeet Kaur Manpreet Kaur Dhanwinder Singh Aderbal C. Oliveira Vijayendra Kumar Garg Virender K. Sharma |
| author_sort | Manmeet Kaur |
| collection | DOAJ |
| description | This paper reports the successful synthesis of magnetic nanocomposite of calcium ferrite with nitrogen doped graphene oxide (CaFe<sub>2</sub>O<sub>4</sub>-NGO) for the effective removal of Pb(II) ions and photocatalytic degradation of congo red and <i>p</i>-nitrophenol. X-ray diffraction (XRD), Fourier transform infrared (FT-IR), transmission electron microscopy (TEM), and scanning electron microscopy-energy dispersive X-ray (SEM-EDX) techniques confirmed the presence of NGO and CaFe<sub>2</sub>O<sub>4</sub> in the nanocomposite. The Mössbauer studies depicted the presence of paramagnetic doublet and sextet due to presence of CaFe<sub>2</sub>O<sub>4</sub> NPs in the nanocomposite. The higher BET surface area in case of CaFe<sub>2</sub>O<sub>4</sub>-NGO (52.86 m<sup>2</sup>/g) as compared to CaFe<sub>2</sub>O<sub>4</sub> NPs (23.45 m<sup>2</sup>/g) was ascribed to the effective modulation of surface in the presence of NGO. Adsorption followed the Langmuir model with maximum adsorption capacity of 780.5 mg/g for Pb(II) ions. Photoluminescence spectrum of nanocomposite displayed four-fold decrease in the intensity, as compared to ferrite NPs, thus confirming its high light capturing potential and enhanced photocatalytic activity. The presence of NGO in nanocomposite offered an excellent visible light driven photocatalytic performance. The quenching experiments supported <sup>●</sup>OH and O<sub>2</sub><sup>●−</sup> radicals as the main reactive species involved in carrying out the catalytic system. The presence of Pb(II) had synergistic effect on photocatalytic degradation of pollutants. This study highlights the synthesis of CaFe<sub>2</sub>O<sub>4</sub>-NGO nanocomposite as an efficient adsorbent and photocatalyst for remediating pollutants. |
| first_indexed | 2024-03-10T10:47:35Z |
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| id | doaj.art-271d6a2e7d9b4aa0b01a8b0365a44a02 |
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| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T10:47:35Z |
| publishDate | 2021-06-01 |
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| spelling | doaj.art-271d6a2e7d9b4aa0b01a8b0365a44a022023-11-21T22:28:02ZengMDPI AGNanomaterials2079-49912021-06-01116147110.3390/nano11061471Synthesis of CaFe<sub>2</sub>O<sub>4</sub>-NGO Nanocomposite for Effective Removal of Heavy Metal Ion and Photocatalytic Degradation of Organic PollutantsManmeet Kaur0Manpreet Kaur1Dhanwinder Singh2Aderbal C. Oliveira3Vijayendra Kumar Garg4Virender K. Sharma5Department of Chemistry, Punjab Agricultural University, Ludhiana 141001, Punjab, IndiaDepartment of Chemistry, Punjab Agricultural University, Ludhiana 141001, Punjab, IndiaDepartment of Soil Science, Punjab Agricultural University, Ludhiana 141001, Punjab, IndiaInstitute of Physics, University of Brasilia, Brasilia 70000-000, BrazilInstitute of Physics, University of Brasilia, Brasilia 70000-000, BrazilProgram for Environment and Sustainability, Department of Environmental and Occupational Health, School of Public Health, Texas A&M University (TAMU), College Station, TX 77843-1266, USAThis paper reports the successful synthesis of magnetic nanocomposite of calcium ferrite with nitrogen doped graphene oxide (CaFe<sub>2</sub>O<sub>4</sub>-NGO) for the effective removal of Pb(II) ions and photocatalytic degradation of congo red and <i>p</i>-nitrophenol. X-ray diffraction (XRD), Fourier transform infrared (FT-IR), transmission electron microscopy (TEM), and scanning electron microscopy-energy dispersive X-ray (SEM-EDX) techniques confirmed the presence of NGO and CaFe<sub>2</sub>O<sub>4</sub> in the nanocomposite. The Mössbauer studies depicted the presence of paramagnetic doublet and sextet due to presence of CaFe<sub>2</sub>O<sub>4</sub> NPs in the nanocomposite. The higher BET surface area in case of CaFe<sub>2</sub>O<sub>4</sub>-NGO (52.86 m<sup>2</sup>/g) as compared to CaFe<sub>2</sub>O<sub>4</sub> NPs (23.45 m<sup>2</sup>/g) was ascribed to the effective modulation of surface in the presence of NGO. Adsorption followed the Langmuir model with maximum adsorption capacity of 780.5 mg/g for Pb(II) ions. Photoluminescence spectrum of nanocomposite displayed four-fold decrease in the intensity, as compared to ferrite NPs, thus confirming its high light capturing potential and enhanced photocatalytic activity. The presence of NGO in nanocomposite offered an excellent visible light driven photocatalytic performance. The quenching experiments supported <sup>●</sup>OH and O<sub>2</sub><sup>●−</sup> radicals as the main reactive species involved in carrying out the catalytic system. The presence of Pb(II) had synergistic effect on photocatalytic degradation of pollutants. This study highlights the synthesis of CaFe<sub>2</sub>O<sub>4</sub>-NGO nanocomposite as an efficient adsorbent and photocatalyst for remediating pollutants.https://www.mdpi.com/2079-4991/11/6/1471CaFe<sub>2</sub>O<sub>4</sub>-NGOPb(II)congo-red (CR)<i>p</i>-nitrophenol (PNP)synergistic adsorption and photocatalysis |
| spellingShingle | Manmeet Kaur Manpreet Kaur Dhanwinder Singh Aderbal C. Oliveira Vijayendra Kumar Garg Virender K. Sharma Synthesis of CaFe<sub>2</sub>O<sub>4</sub>-NGO Nanocomposite for Effective Removal of Heavy Metal Ion and Photocatalytic Degradation of Organic Pollutants Nanomaterials CaFe<sub>2</sub>O<sub>4</sub>-NGO Pb(II) congo-red (CR) <i>p</i>-nitrophenol (PNP) synergistic adsorption and photocatalysis |
| title | Synthesis of CaFe<sub>2</sub>O<sub>4</sub>-NGO Nanocomposite for Effective Removal of Heavy Metal Ion and Photocatalytic Degradation of Organic Pollutants |
| title_full | Synthesis of CaFe<sub>2</sub>O<sub>4</sub>-NGO Nanocomposite for Effective Removal of Heavy Metal Ion and Photocatalytic Degradation of Organic Pollutants |
| title_fullStr | Synthesis of CaFe<sub>2</sub>O<sub>4</sub>-NGO Nanocomposite for Effective Removal of Heavy Metal Ion and Photocatalytic Degradation of Organic Pollutants |
| title_full_unstemmed | Synthesis of CaFe<sub>2</sub>O<sub>4</sub>-NGO Nanocomposite for Effective Removal of Heavy Metal Ion and Photocatalytic Degradation of Organic Pollutants |
| title_short | Synthesis of CaFe<sub>2</sub>O<sub>4</sub>-NGO Nanocomposite for Effective Removal of Heavy Metal Ion and Photocatalytic Degradation of Organic Pollutants |
| title_sort | synthesis of cafe sub 2 sub o sub 4 sub ngo nanocomposite for effective removal of heavy metal ion and photocatalytic degradation of organic pollutants |
| topic | CaFe<sub>2</sub>O<sub>4</sub>-NGO Pb(II) congo-red (CR) <i>p</i>-nitrophenol (PNP) synergistic adsorption and photocatalysis |
| url | https://www.mdpi.com/2079-4991/11/6/1471 |
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