Volume 16 Issue 3
Sep.  2023
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Piyawan Nuengmatcha, Arnannit Kuyyogsuy, Paweena Porrawatkul, Rungnapa Pimsen, Saksit Chanthai, Prawit Nuengmatcha. 2023: Efficient degradation of dye pollutants in wastewater via photocatalysis using a magnetic zinc oxide/graphene/iron oxide-based catalyst. Water Science and Engineering, 16(3): 243-251. doi: 10.1016/j.wse.2023.01.004
Citation: Piyawan Nuengmatcha, Arnannit Kuyyogsuy, Paweena Porrawatkul, Rungnapa Pimsen, Saksit Chanthai, Prawit Nuengmatcha. 2023: Efficient degradation of dye pollutants in wastewater via photocatalysis using a magnetic zinc oxide/graphene/iron oxide-based catalyst. Water Science and Engineering, 16(3): 243-251. doi: 10.1016/j.wse.2023.01.004

Efficient degradation of dye pollutants in wastewater via photocatalysis using a magnetic zinc oxide/graphene/iron oxide-based catalyst

doi: 10.1016/j.wse.2023.01.004

This work was supported by the Research and Development Institute at Nakhon Si Thammarat Rajabhat University and the Nanomaterials Chemistry Research Unit at Nakhon Si Thammarat Rajabhat University, Nakhon Si Thammarat, Thailand (Grant No. 004/2563).

  • Received Date: 2022-09-27
  • Accepted Date: 2023-02-02
  • Rev Recd Date: 2023-01-10
  • In this paper, we present a proof-of-concept study of the enhancement of photocatalytic activity via a combined strategy of fabricating a visiblelight responsive ternary heterostructure and improving overall photostability by incorporating magnetic zinc oxide/graphene/iron oxide (ZGF). A solvothermal approach was used to synthesize the catalyst. X-ray diffraction (XRD), scanning electron microscopic, energy dispersive X-ray, transmission electron microscopic, vibrating sample magnetometric, and ultravioletevisible diffuse reflectance spectroscopic techniques were used to characterize the synthesized samples. The obtained optimal Zn(NO3)2 concentration, temperature, and heating duration were 0.10 mol/L, 600 C, and 1 h, respectively. The XRD pattern revealed the presence of peaks corresponding to zinc oxide, graphene, and iron oxide, indicating that the ZGF catalyst was effectively synthesized. Furthermore, when the developed ZGF was used for methylene blue dye degradation, the optimum irradiation time, dye concentration, catalyst dosage, irradiation intensity, and solution pH were 90 min, 10 mg/L, 0.03 g/L, 100 W, and 8.0, respectively. Therefore, the synthesized ZGF system could be used as a catalyst to degrade dyes in wastewater samples. This hybrid nanocomposite consisting of zinc oxide, graphene, and iron oxide could also be used as an effective photocatalytic degrader for various dye pollutants.


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