Facile synthesis of g-C3N4(0.94)/CeO2(0.05)/Fe3O4(0.01) nanosheets for DFT supported visible photocatalysis of 2-Chlorophenol

Abstract Visible light active g-C 3 N 4(0.94) /CeO 2(0.05) /Fe 3 O 4(0.01) ternary composite nanosheets were fabricated by facile co-precipitation routes. The density functional theory (DFT) computations investigated changes in geometry and electronic character of g-C3N4 with CeO2 and Fe3O4 addition...

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Autores principales:	Jamshaid Rashid, Nadia Parveen, Aneela Iqbal, Saif Ullah Awan, Naseem Iqbal, Shamraiz Hussain Talib, Naveed Hussain, Bilal Akram, Ata Ulhaq, Bilal Ahmed, Ming Xu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6614de4993f84536a781b3e1da7baa6b
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spelling	oai:doaj.org-article:6614de4993f84536a781b3e1da7baa6b2021-12-02T15:09:45ZFacile synthesis of g-C3N4(0.94)/CeO2(0.05)/Fe3O4(0.01) nanosheets for DFT supported visible photocatalysis of 2-Chlorophenol10.1038/s41598-019-46544-72045-2322https://doaj.org/article/6614de4993f84536a781b3e1da7baa6b2019-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-46544-7https://doaj.org/toc/2045-2322Abstract Visible light active g-C 3 N 4(0.94) /CeO 2(0.05) /Fe 3 O 4(0.01) ternary composite nanosheets were fabricated by facile co-precipitation routes. The density functional theory (DFT) computations investigated changes in geometry and electronic character of g-C3N4 with CeO2 and Fe3O4 addition. Chemical and surface characterizations were explored with XRD, XPS, SEM, TEM, PL, DRS and Raman measurements. DRS and PL spectroscopy evidenced the energy band gap tailoring from 2.68 eV for bulk g-C3N4 and 2.92 eV for CeO2 to 2.45 eV for the ternary nanocomposite. Efficient electron/hole pair separation, increase in red-ox species and high exploitation of solar spectrum due to band gap tailoring lead to higher degradation efficiency of g-C 3 N 4(0.94) /CeO 2(0.05) /Fe 3 O 4(0.01) . Superior sun light photocatalytic breakdown of 2-Chlorophenol was observed with g-C3N4 having CeO2 loading up to 5 wt%. In case of ternary nanocomposites deposition of 1 wt% Fe3O4 over g-C3N4/CeO2 binary composite not only showed increment in visible light catalysis as predicted by the DFT studies, but also facilitated magnetic recovery. The g-C 3 N 4(0.94) /CeO 2(0.05) /Fe 3 O 4(0.01) nanosheets showed complete mineralization of 25 mg.L−1 2-CP(aq) within 180 min exposure to visible portion of sun light and retained its high activity for 3 consecutive reuse cycles. The free radical scavenging showed superoxide ions and holes played a significant role compared to hydroxyl free radicals while chromatographic studies helped establish the 2-CP degradation mechanism. The kinetics investigations revealed 2.55 and 4.04 times increased rate of reactions compared to pristine Fe3O4 and CeO2, showing highest rate constant value of 18.2 × 10−3 min−1 for the ternary nanocomposite. We present very persuasive results that can be beneficial for exploration of further potential of g-C 3 N 4(0.94) /CeO 2(0.05) /Fe 3 O 4(0.01) in advance wastewater treatment systems.Jamshaid RashidNadia ParveenAneela IqbalSaif Ullah AwanNaseem IqbalShamraiz Hussain TalibNaveed HussainBilal AkramAta UlhaqBilal AhmedMing XuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-14 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jamshaid Rashid Nadia Parveen Aneela Iqbal Saif Ullah Awan Naseem Iqbal Shamraiz Hussain Talib Naveed Hussain Bilal Akram Ata Ulhaq Bilal Ahmed Ming Xu Facile synthesis of g-C3N4(0.94)/CeO2(0.05)/Fe3O4(0.01) nanosheets for DFT supported visible photocatalysis of 2-Chlorophenol
description	Abstract Visible light active g-C 3 N 4(0.94) /CeO 2(0.05) /Fe 3 O 4(0.01) ternary composite nanosheets were fabricated by facile co-precipitation routes. The density functional theory (DFT) computations investigated changes in geometry and electronic character of g-C3N4 with CeO2 and Fe3O4 addition. Chemical and surface characterizations were explored with XRD, XPS, SEM, TEM, PL, DRS and Raman measurements. DRS and PL spectroscopy evidenced the energy band gap tailoring from 2.68 eV for bulk g-C3N4 and 2.92 eV for CeO2 to 2.45 eV for the ternary nanocomposite. Efficient electron/hole pair separation, increase in red-ox species and high exploitation of solar spectrum due to band gap tailoring lead to higher degradation efficiency of g-C 3 N 4(0.94) /CeO 2(0.05) /Fe 3 O 4(0.01) . Superior sun light photocatalytic breakdown of 2-Chlorophenol was observed with g-C3N4 having CeO2 loading up to 5 wt%. In case of ternary nanocomposites deposition of 1 wt% Fe3O4 over g-C3N4/CeO2 binary composite not only showed increment in visible light catalysis as predicted by the DFT studies, but also facilitated magnetic recovery. The g-C 3 N 4(0.94) /CeO 2(0.05) /Fe 3 O 4(0.01) nanosheets showed complete mineralization of 25 mg.L−1 2-CP(aq) within 180 min exposure to visible portion of sun light and retained its high activity for 3 consecutive reuse cycles. The free radical scavenging showed superoxide ions and holes played a significant role compared to hydroxyl free radicals while chromatographic studies helped establish the 2-CP degradation mechanism. The kinetics investigations revealed 2.55 and 4.04 times increased rate of reactions compared to pristine Fe3O4 and CeO2, showing highest rate constant value of 18.2 × 10−3 min−1 for the ternary nanocomposite. We present very persuasive results that can be beneficial for exploration of further potential of g-C 3 N 4(0.94) /CeO 2(0.05) /Fe 3 O 4(0.01) in advance wastewater treatment systems.
format	article
author	Jamshaid Rashid Nadia Parveen Aneela Iqbal Saif Ullah Awan Naseem Iqbal Shamraiz Hussain Talib Naveed Hussain Bilal Akram Ata Ulhaq Bilal Ahmed Ming Xu
author_facet	Jamshaid Rashid Nadia Parveen Aneela Iqbal Saif Ullah Awan Naseem Iqbal Shamraiz Hussain Talib Naveed Hussain Bilal Akram Ata Ulhaq Bilal Ahmed Ming Xu
author_sort	Jamshaid Rashid
title	Facile synthesis of g-C3N4(0.94)/CeO2(0.05)/Fe3O4(0.01) nanosheets for DFT supported visible photocatalysis of 2-Chlorophenol
title_short	Facile synthesis of g-C3N4(0.94)/CeO2(0.05)/Fe3O4(0.01) nanosheets for DFT supported visible photocatalysis of 2-Chlorophenol
title_full	Facile synthesis of g-C3N4(0.94)/CeO2(0.05)/Fe3O4(0.01) nanosheets for DFT supported visible photocatalysis of 2-Chlorophenol
title_fullStr	Facile synthesis of g-C3N4(0.94)/CeO2(0.05)/Fe3O4(0.01) nanosheets for DFT supported visible photocatalysis of 2-Chlorophenol
title_full_unstemmed	Facile synthesis of g-C3N4(0.94)/CeO2(0.05)/Fe3O4(0.01) nanosheets for DFT supported visible photocatalysis of 2-Chlorophenol
title_sort	facile synthesis of g-c3n4(0.94)/ceo2(0.05)/fe3o4(0.01) nanosheets for dft supported visible photocatalysis of 2-chlorophenol
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/6614de4993f84536a781b3e1da7baa6b
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Facile synthesis of g-C3N4(0.94)/CeO2(0.05)/Fe3O4(0.01) nanosheets for DFT supported visible photocatalysis of 2-Chlorophenol

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