Logical Optimization of Metal-Organic Frameworks for Photocatalytic Degradation of Organic Pollutants in Water via Box-Behnken Design
- Authors
- Afzal, Iqra; Akhter, Toheed; Hassan, Sadaf Ul; Lee, Ho Kyung; Razzaque, Shumaila; Mahmood, Asif; Al-Masry, Waheed; Lee, Hansol; Park, Chan Ho
- Issue Date
- Jan-2024
- Publisher
- AMER CHEMICAL SOC
- Keywords
- photocatalysis; MOFs; bimetallic composites; BiOI; dye degradation; Box-Behnken design
- Citation
- ACS ES&T WATER, v.4, no.2, pp 648 - 660
- Pages
- 13
- Journal Title
- ACS ES&T WATER
- Volume
- 4
- Number
- 2
- Start Page
- 648
- End Page
- 660
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/90612
- DOI
- 10.1021/acsestwater.3c00667
- ISSN
- 2690-0637
2690-0637
- Abstract
- Cobalt/copper-based bimetallic metal-organic frameworks (Co/Cu-MOFs) are synthesized using two organic ligands in the presented research work. Subsequent incorporation of bismuth oxyiodide (BiOI) into the MOFs via a hydrothermal approach formed composite materials (Co/Cu-MOFs@BiOI) that exhibit an efficient photocatalytic activity. The synthesized materials were thoroughly characterized by using X-ray diffraction, Fourier transform infrared, and scanning electron microscopy techniques. Co/Cu-MOF @BiOI was employed as a novel photocatalyst for the degradation of cationic methylene blue (MB) dye in aqueous solution under visible light. The combination of Co/Cu-MOFs with BiOI significantly enhanced the photocatalytic degradation efficiency of MB relative to that of bimetallic MOFs (Co/Cu-MOFs) owing to increased visible light absorption and reduced charge-carrier recombination. A Box-Behnken design (BBD) statistical study is employed in conjunction with response surface methodology (RSM) to optimize the dye degradation process. The BBD-RSM methodology successfully identified the optimal dye degradation conditions, including an initial dye concentration of 6 ppm, irradiation time of 120 min, and catalyst dosage of 0.14 g L-1. Furthermore, the predicted coefficient of regression (R (2)) value under these optimal conditions using BBD-RSM was 99%, indicating a strong correlation between the prediction and experimental observation. These results demonstrate the strong potential of the Co/Cu-MOF @BiOI composites as efficient photocatalysts for the removal of organic dyes.
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