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Morphology effect on photocatalytic activity of self-doped ZnO nanoflowers

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Abstract

In this study, a flowerlike nanostructure of zinc oxide (ZnO) was synthesized using a simple hydrothermal method. Systematic experiments were carried out to investigate the factors that affect the morphology of the samples. Extensive research is conducted on nanostructured ZnO materials using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and UV–visible diffuse reflectance spectroscopy (UV–Vis DRS). The XRD and FE-SEM analyses were used to determine the particle size of the synthesized nanostructure ZnO. It was revealed that the flowerlike crystallites had an average size of around 55 nm. Additionally, the UV–Vis DRS analysis provided information on the band gap energy of the ZnO nanostructure, which is a crucial parameter for its photocatalytic activity. The results indicated that the synthesized ZnO nanostructure had a narrow band gap, which enhanced its ability to absorb UV light and generate electron–hole pairs for photocatalysis. Metal oxide semiconductors are considered to be among the leading front-runners in the field of photocatalysis owing to their exceptional physical features, durability, and cost-effectiveness. Since photocatalysis offers such a broad variety of applications in fields such as wastewater treatment and environmental remediation, there has been a significant uptick in interest in the field. The synthesized ZnO powder has excellent photocatalytic degradation capabilities for rhodamine B dye (RhB). In 3 h, 20 mL of RhB solution containing 15 mg L−1 was destroyed by 300 mg of flowerlike ZnO powder.

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Acknowledgements

We, the authors, express our sincere gratitude to the University of Mysore, Mysore, for the laboratory facilities provided to us. One of the authors SK is indebted to the Department of

Minority, Government of Karnataka, for providing minority fellowship.

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Authors and Affiliations

  1. Department of Chemistry, Yuvaraja’s College (Autonomous), University of Mysore, Mysuru, Karnataka, India

    Salma Kouser & Shaukath Ara Khanum

  2. Centre for Materials Science and Technology, University of Mysore, Vijana Bhavana, P.B.No.21, Manasagangothri, Mysuru-570006, India

    Abdo Hezam, K. Namratha & K. Byrappa

Authors
  1. Salma Kouser
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  2. Abdo Hezam
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  3. K. Namratha
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  4. K. Byrappa
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  5. Shaukath Ara Khanum
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Correspondence to Shaukath Ara Khanum.

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Kouser, S., Hezam, A., Namratha, K. et al. Morphology effect on photocatalytic activity of self-doped ZnO nanoflowers. J IRAN CHEM SOC 20, 2561–2568 (2023). https://doi.org/10.1007/s13738-023-02854-2

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