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Photocatalytic removal of diazinon with Ag-coated SiO2@TiO2 core–shell using the response surface methodology

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Abstract

A two-step method comprising hydrothermal processing and photodeposition was used to synthesize core–shell nanocomposites of silver-coated silicon dioxide and titanium dioxide (Ag-SiO2@TiO2). The shape, identification of crystalline components, and substance of Ag-coated SiO2@TiO2 nanocomposites were examined using SEM, X-ray diffraction, and Fourier-transform infrared spectra. This research used a photocatalytic batch system to degrade diazinon from an aqueous solution using Ag nanoparticles photo-deposited on a SiO2@TiO2 core–shell structure at a mass concentration of 6%. The effect of five operating factors on pollutant oxidation (RSM) was studied using the central composite design (CCD) of response surface methodologies. Under optimal conditions of catalyst concentration (30 mg/L), diazinon concentration (10 mg/L), pH = 7, H2O2 (200 mg/L), and reaction time of 90 min, the Ag nanoparticle was shown to be very effective at treating diazinon-contaminated water, with a maximum removal efficiency of 99.74%. The anticipated R2 matched the modified R2 very well, indicating that the predictions and the experiments were in great agreement. The predictions made by the CCD modeling were correct, as evidenced by the lab data.

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Acknowledgements

The authors would like to extend their gratitude to the Environmental Engineering Lab at Mosul University for providing them with the tools they needed to improve the quality of their work.

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Authors and Affiliations

  1. Department of Environmental Technologies, College of Environmental Science and Technologies, University of Mosul, 41001, Mosul, Iraq

    R. K. S. Mhemid

  2. Department of Mining Engineering, College of Petroleum and Mining Engineering, University of Mosul, 41001, Mosul, Iraq

    L. I. Saeed

  3. Department of Environmental Engineering, College of Engineering, University of Baghdad, Baghdad, Iraq

    R. N. Mohammed

Authors
  1. R. K. S. Mhemid
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  2. L. I. Saeed
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  3. R. N. Mohammed
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Contributions

RKSM was involved in conception, investigation, reviewing, and editing; LIS helped in investigation, methodology, and original draft; study design, data analysis; RNM contributed to project administration. The final manuscript has been read and approved by all writers.

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Correspondence to L. I. Saeed.

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Each author states that they have no financial or other conflicts of interest.

Additional information

Editorial responsibility: Fatih ŞEN.

This research was conducted between 2021 and 2022 at the Universities of Baghdad and Mosul.

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Mhemid, R.K.S., Saeed, L.I. & Mohammed, R.N. Photocatalytic removal of diazinon with Ag-coated SiO2@TiO2 core–shell using the response surface methodology. Int. J. Environ. Sci. Technol. 21, 329–340 (2024). https://doi.org/10.1007/s13762-023-05134-x

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  • DOI: https://doi.org/10.1007/s13762-023-05134-x

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