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Effect of Mg doping on ZnO fabricated using aqueous leaf extract of Ziziphus mauritiana Lam. for antioxidant and antibacterial studies

Bioprocess and Biosystems Engineering volume 44, pages 875–889 (2021)Cite this article

Abstract

Aqueous leaf extract of Ziziphus mauritiana Lam. was successfully used to synthesize zinc oxide (ZnO) and magnesium-doped ZnO (Mg-doped ZnO) particles and acted as capping and stabilizing agent. UV–Vis diffuse reflectance spectra showed that optical band gap energy of ZnO has narrowed from 3.11 to 3.08 eV and 3.03 eV when doped with 1% Mg and 5% Mg, respectively. Powder X-ray diffraction and X-ray photoelectron spectroscopy studies confirmed the purity and crystalline nature of the synthesized materials. FT-IR spectroscopy revealed the presence of phytochemicals coated on the surface of synthesized materials. The synthesized materials were found to effectively scavenge DPPH radicals in the presence of visible light in comparison to the dark. The antibacterial properties of the synthesized materials were evaluated against Staphylococcus aureus and Escherichia coli. The obtained results revealed that Staphylococcus aureus seemed to be more sensitive to the green synthesized ZnO and Mg-doped ZnO than Escherichia coli.

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Acknowledgements

Authors would like to acknowledge the FIC block grant UBD/RSCH/1.4/FICBF(b)/2018/012 received from Universiti Brunei Darussalam, Brunei Darussalam.

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Affiliations

  1. Chemical Sciences, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410, Brunei Darussalam

    Ashmalina Rahman, Mohammad Hilni Harunsani, Ai Ling Tan & Mohammad Mansoob Khan

  2. Environmental and Life Sciences, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410, Brunei Darussalam

    Norhayati Ahmad

  3. Institut Für Chemie, Technische Universität Berlin, Straße des 17, Juni 135, 10623, Berlin, Germany

    Mirabbos Hojamberdiev

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  1. Ashmalina Rahman
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Contributions

AR: Methodology, investigation, data curation, writing–original draft. MHH: Supervision, writing, review & editing. ALT: Supervision, writing, review & editing. NA: Supervision, review & editing particularly the antibacterial section. MH: Resources & formal analysis. MMK: Supervision, conceptualization, funding acquisition, writing, review & editing.

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Correspondence to Mohammad Mansoob Khan.

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Rahman, A., Harunsani, M.H., Tan, A.L. et al. Effect of Mg doping on ZnO fabricated using aqueous leaf extract of Ziziphus mauritiana Lam. for antioxidant and antibacterial studies. Bioprocess Biosyst Eng 44, 875–889 (2021). https://doi.org/10.1007/s00449-020-02496-1

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Keywords

  • Ziziphus mauritiana Lam.
  • Zinc oxide
  • ZnO
  • Mg-doped ZnO
  • Aqueous leaf extract
  • Antioxidant activities
  • Antibacterial studies