Sol-Gel Synthesis of Fe2O3-Doped TiO2 for Optimized Photocatalytic Degradation of 2,4- Dichlorophenoxyacetic Acid

Razani, Afini; Abdullah, Abdul Halim; Fitrianto, Anwar; Yusof, Nor Azah; Gaya, Umar Ibrahim

doi:10.13005/ojc/330442

Cited by 15 publications

(3 citation statements)

References 13 publications

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“…Zinc precursor solution of concentration 0.2 M was prepared by dissolving 5.9500 g of zinc nitrate hexahydrate in 100 mL of distilled water [19]. Then, 2.5214 g of oxalic acid dihydrate was dissolved in 100 mL of distilled water to produce 0.2 M oxalic acid [20]. This concentration of oxalic acid was chosen to maintain the molar ratio of oxalic acid to zinc precursor as 1:1 [21].…”

Section: Preparation Of Undoped Zinc Oxidementioning

confidence: 99%

“…Then, 0.0199 g of iron(II) chloride tetrahydrate was dissolved in 100 mL of distilled water to produce 0.001 M of iron(II) precursor solution which is equivalent to 0.25 mol% of 0.2 M zinc precursor solution. Moving on, 2.5214 g of oxalic acid dihydrate was dissolved in 100 mL of distilled water to produce 0.2 M oxalic acid [20]. This concentration of oxalic acid was chosen to maintain the molar ratio of oxalic acid to zinc precursor as 1:1 [21].…”

Section: Synthesis Of Iron(ii)-doped Zinc Oxide and Iron(iii)-doped Z...mentioning

confidence: 99%

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Synthesis and evaluation of Fe-doped zinc oxide photocatalyst for methylene blue and congo red removal

Cheah

Sum

2022

PROGEE

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Zinc oxide is one of the most common photocatalysts utilized for the photocatalytic degradation of synthetic dyes aside from titanium dioxide. However, the application of ZnO in the treatment of wastewater containing synthetic dyes is limited due to the high energy band gap which allows ZnO to be efficient upon irradiation with ultraviolet radiation only. This study aims to evaluate the photocatalytic degradation efficiency of the zinc oxide photocatalyst and its derivatives, specifically 0.25, 0.5, 2.5 and 5 mol% Fe(II)-doped ZnO, 0.25, 0.5, 2.5 and 5 mol% Fe(III)-doped ZnO and 2.5 mol% Fe(II)-Fe(III)-doped ZnO. The performance of the photocatalysts was evaluated based on the effect of solution pH, effect of photocatalyst loading and nature of dye. The synthesis of photocatalysts were done using sol-gel synthesis method, and photodegradation tests were carried out under visible light exposure for 60 minutes. The photocatalysts were characterized with SEM, FTIR, and UV-Vis spectroscopy. The optical characterization results show that 2.5 mol% Fe(II)-Fe(III)-doped ZnO has the lowest band gap energy of 3.401 eV which was estimated using Tauc’s plot. This further validated the degradation performance of the 2.5 mol% Fe(II)-Fe(III)-doped ZnO photocatalyst where it displayed the highest photocatalytic degradation efficiencies at all pH and photocatalyst loading. The highest degradation achieved using methylene blue was 94.21% and 32.97% using congo red as model solute at optimum pH and 300 mg/L photocatalyst loading. In overall, the present study has proven that Fe-doped photocatalysts have the potential for the degradation of various synthetic dyes upon irradiation with visible light.

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Section: Preparation Of Undoped Zinc Oxidementioning

confidence: 99%

Section: Synthesis Of Iron(ii)-doped Zinc Oxide and Iron(iii)-doped Z...mentioning

confidence: 99%

Synthesis and evaluation of Fe-doped zinc oxide photocatalyst for methylene blue and congo red removal

Cheah

Sum

2022

PROGEE

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“…Therefore, it is important to remove dyes from aqueous solutions before discharging them into the environment (Karim et al, 2019). Recently, investigators have paid great attention to numerous treatment technologies for the removal and degradation of dyes in wastewater through biodegradation, adsorption, chemical treatment, coagulation, membrane processes, and photocatalysis (Razani et al, 2017;Tetteh and Rathial, 2020). Photocatalysis is considered a promising alternative for the degradation of various organic pollutants or dyes (Nleonu et al, 2023a).…”

Section: Introductionmentioning

confidence: 99%

Comparative Optimization of Photocatalysis and Adsorption of Methylene Blue Using Aluminum Doped Magnetic Iron Oxide by Central Composite Design

Amor

2023

Int. J. Res. Publ. Rev.

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Water pollution still remains a major issue in developing countries due to poor disposal systems. Therefore, this study was to optimize methylene blue removal from aqueous solutions through adsorption and photocatalysis methods using aluminium-doped magnetic iron oxide. The synthesis of aluminium-doped magnetic iron oxide (AlFe3O4) as an adsorbent and photocatalyst was successfully prepared using the co-precipitation method. The removal efficiency of the AlFe3O4 was evaluated as a function of two input parameters, viz., catalyst/ adsorbent dose (0.1-0.5 g) and contact time (20-100 min) by using central composite design (CCD) adopted from response surface methodology (RSM). Using removal and degradation efficiency as responses, a 13 run experiment matrix was generated by the CCD to investigate the interaction effects of the two input factors. From the results, a linear model was generated for the two treatment methods of adsorption and photocatalytic processes, which didn't show good predictability of results agreeable to the experimental data. The analysis of variance (ANOVA) showed the selected models for adsorption and degradation were significant (P <0.05) with poor coefficients of determination (R 2 ) values of 0.6323 and 0.6535, respectively.The highest efficiency of MB removal for the adsorption process (59.68%) and the photocatalysis process (49.02%) were obtained in optimum conditions of adsorbent/photocatalyst = 0.23g, contact time = 38.96 min, and MB concentration = 40mg/l. The kinetic studies showed that the adsorption data fitted well to a pseudo-first-order kinetic model, whereas the photocatalysis data fitted well to a pseudo-second-order kinetic model.

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Fe-doped TiO2 nanomaterials for water depollution

Crışan

Ianculescu

Crışan

et al. 2020

Nanotechnology in the Beverage Industry

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Sol-Gel Synthesis of Fe2O3-Doped TiO2 for Optimized Photocatalytic Degradation of 2,4- Dichlorophenoxyacetic Acid

Cited by 15 publications

References 13 publications

Synthesis and evaluation of Fe-doped zinc oxide photocatalyst for methylene blue and congo red removal

Synthesis and evaluation of Fe-doped zinc oxide photocatalyst for methylene blue and congo red removal

Comparative Optimization of Photocatalysis and Adsorption of Methylene Blue Using Aluminum Doped Magnetic Iron Oxide by Central Composite Design

Fe-doped TiO2 nanomaterials for water depollution

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