doi: 10.18178/ijesd.2022.13.3.1372
Comparison of the Photocatalytic Degradation of Congo Red Dye Using NiO and NiO-NiFe<sub>2</sub>O<sub>4</sub> Composite
Poedji Loekitowati Hariani1
,
Muhammad Said1 ,
Addy Rachmat1 ,
Astri Nurmansyah2 ,
Ra Hoetary Tirta Amallia3
- 1Department of Chemistry, Universitas Sriwijaya, Ogan Ilir 30662, Indonesia
- 2Magister Program of Chemistry, Universitas Sriwijaya, Indonesia
- 3Doctoral Program of Environmental Science, Universitas Sriwijaya, Ogan Ilir 30662, Indonesia
Abstract
NiO and NiO-NiFe<sub>2</sub>O<sub>4</sub>, composite had been synthesized by the coprecipitation method and characterized using XRD, FTIR, UV-DRS, and SEM-EDS. The photocatalytic degradation performances of the photocatalyst were investigated using visible irradiation, in which Congo red dye was used as a model. The photocatalytic degradation process was assessed through three variables: the pH of the solution, Congo red dye initial concentration, and irradiation time. The removal efficiency of photocatalytic degradation of 98.45% was achieved using NiO-NiFe<sub>2</sub>O<sub>4</sub> at a pH of 6, an initial concentration of the dye of 100 mg/L, and an irradiation time of 120 minutes was higher than that obtained using NiO, which was 78.5%. Pseudo-first-order was suitable to describe the kinetics of photocatalytic degradation of Congo red, with values of k = 0.0114 min<sup>-1</sup> and t<sub>1/2</sub> = 60.789 min using NiO as the photocatalyst, and with k =0.0225 min<sup>-1</sup> and t<sub>1/2</sub> = 30.8 min using NiO-NiFe<sub>2</sub>O<sub>4</sub>. The removal efficiency of the NiO-NiFe<sub>2</sub>O<sub>4</sub> composite of consecutive reuse three-time was 98.45, 97.13, and 96.21%, while NiO was 78.30, 77.12, and 75.32%. Therefore, NiO-NiFe<sub>2</sub>O<sub>4</sub> was considered more effective in reducing Congo red concentration than NiO.
Keywords
- NiO
- NiO-NiFe 2 O 4 composite
- photocatalytic
- degradation
- Congo red
How to Cite
Poedji Loekitowati Hariani, Muhammad Said, Addy Rachmat, Astri Nurmansyah, and Ra Hoetary Tirta Amallia, "Comparison of the Photocatalytic Degradation of Congo Red Dye Using NiO and NiO-NiFe<sub>2</sub>O<sub>4</sub> Composite," International Journal of Environmental Science and Development, vol. 13, no. 3, pp. 57-62, 2022. https://doi.org/10.18178/ijesd.2022.13.3.1372
Copyright & License
Copyright © 2022 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).