Photocatalytic decolourization of Rhodamine-B dye by visible light active ZIF-8/BiFeO3 composite

Bethi, Bhaskar; Radhika, G.; Le, Minh-Tuan; Sonawane, Shirish H.; Boczkaj, Grzegorz

doi:10.1007/s11356-022-20165-6

Cited by 15 publications

(3 citation statements)

References 15 publications

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“…PCS demonstrated high efficacy, achieving 99.47% and 99.31% degradation at a dye concentration of 80 mg/L, a catalyst dose of 0.005 g, and pH levels of 11 and 5 within 60 min. Bethi et al (2023) synthesized a photocatalyst composing of ZIF-8 and BiFeO 3 , using ultrasound, and analyzed its effectiveness in decolorizing Rhodamine-B dye using UV and visible light. The hybrid ZIF-8/BiFeO 3 composite showed significant activity against Rh-B dye, with enhanced efficacy in acidic pH solutions, and resulting in complete decolorization of Rh-B dye in just 50 min at a pH of 5.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Procion brilliant yellow H‐E6G using ultrasonic and hydrodynamic cavitation combined with oxidants with demonstration at pilot scale

Momin,

Gogate

2024

Water Environment Research

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The current study focuses on the degradation of Procion brilliant yellow H‐E6G, an azo dye, using ultrasonic and hydrodynamic cavitation (HC), evaluating the impact of various parameters on the extent of degradation. The use of only ultrasound showed less oxidation capacity as indicated by only 19.1% degradation at an optimized power of 140 W, pH of 2.5, temperature of 40°C, and initial dye concentration of 15 ppm. The effectiveness of hybrid approaches involving US + H2O2, US + Fenton, and US + H2O2 + potassium persulfate (KPS) was subsequently evaluated under optimized conditions. A notable enhancement in decolorization extent was observed for combined operations, including US + H2O2, US + Fenton, and US + H2O2 + KPS (dual oxidant scheme) with the actual decolorization extents as 80.6%, 85%, and 92.2% respectively. An optimized scheme of US + H2O2 + KPS was also utilized to decolorize the dye at a pilot scale using a US flow cell and also an HC reactor that yielded 91.8% and 88% reductions in initial concentration. The dye decolorization was elucidated to follow first‐order kinetics for all the individual and combination approaches. The obtained values of the rate constants were also utilized for the evaluation of the synergistic index. A toxicity analysis was also performed on the dye, both before and following treatment, utilizing two bacterial strains. A comparative analysis of various treatment approaches has been presented focusing on factors such as cavitational yield, operational expenses, and energy requirements. The study elucidated that the combination of US + H2O2 + KPS effectively removes Procion brilliant yellow H‐E6G giving 92.2% as the maximum degradation at an operating cost of 0.1862 $/L.Practitioner Points First depiction of cavitative degradation of Procion brilliant yellow H‐E6G Optimizing the equipment operating parameters and chemical oxidants Demonstration of optimized treatment scheme at pilot scale Evaluation of various approaches based on synergy and costs of treatment US + H2O2 + KPS is the best approach for dye degradation

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Section: Introductionmentioning

confidence: 99%

Degradation of Procion brilliant yellow H‐E6G using ultrasonic and hydrodynamic cavitation combined with oxidants with demonstration at pilot scale

Momin,

Gogate

2024

Water Environment Research

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“…Effective photocatalytic wastewater treatment can be achieved using BiOBr due to its suitable and narrow band structure (Saddique et al 2023). The ZIF-8/BiFeO 3 photocatalyst manufactured using ultrasonic conversion was reported to completely remove RhB dye in 50 min at pH 5 (Bethi et al 2023), efficiently treating complex model wastewater. TiO 2 was shown to be a financially viable option for use in TiO 2 /UV/H 2 O 2 and TiO 2 /UV/O 3 /H 2 O 2 photocatalytic technologies for the effective and quick (100 min) breakdown of volatile organic compounds with notably low chemical concentrations (Fernandes et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Optimization and modeling of solar photocatalytic degradation of raw textile wastewater dyes using green ZnO-ED NPs by RSM

Dihom,

Mohamed,

Al-Gheethi

et al. 2024

Water Practice &Amp; Technology

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This study aims to use green ZnO-ED NPs produced from Eleocharis dulcis (E. dulcis) extract to maximize solar photocatalytic degradation of raw textile wastewater. The optimization of photocatalysis was decided using the response surface methodology (RSM) as a function of ZnO-ED NPs mass load (0.1–2 g), initial concentration (10–100%), pH (4–9), and contact time (60–200 min). The maximum decolorization (87.34%) and COD removal (100%) were recorded at pH 7, time (60 min), ZnO-ED NPs dosage (2 g/L), and 10% of color concentrations with R2 coefficient of 0.78 at p < 0.05. FESEM analysis showed the presence of granules with smaller diameters than the diameter of the ZnO-ED NPs granules before SPD. EDX analysis revealed the presence of impurities like copper (Cu). XRD analysis indicated the purity of ZnO-ED NPs after SPD, as the values were all quite similar to the XRD values before SPD. The results of an AFM analysis presented that agglomerations of ZnO-ED NPs, in contrast, were somewhat homogeneous in size, nature, and dispersion before SPD.

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“…For example,Bethi et al developed ZiF-8/BiFeO 3 composite that was reported effective in visible light range for degradation of Rhodamine-B dye. The composite of ZiF-8/BiFeO 3 was more effective in degrading Rhodamine-B dye as compared to individual ZiF-8 and BiFeO 3(Bethi et al, 2023) Landge et al (2022). studied degradation of Congo Red azo dye using a Cu-ZnO/TiO 2 nanocom-…”

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confidence: 99%

Degradation of pesticides using hybrid processes based on cavitation and photocatalysis: A review

Bagal,

Nandgawle,

Thosar

et al. 2023

Environmental Quality Mgmt

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The production of pesticides and its subsequent consumption in agricultural fields have increased significantly also resulting in environmental concerns. The current review discusses the different aspects of two emerging techniques as cavitation and photocatalysis that can be effectively applied for the degradation of toxic pesticides. Governing mechanisms for the degradation have been presented followed by discussion on the effect of different parameters on the extent of degradation, also presenting guidelines for optimum selection. It has been also demonstrated that the obtained degradation can be synergistically intensified by using combined techniques with complimentary mechanisms. The discussion clearly revealed that cavitation and photocatalysis have great potential to degrade pesticides efficiently. Overall, it was demonstrated that combined technique under the optimized set of operating conditions is energy‐efficient, cost‐effective and promising technique for pesticide degradation.

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Photocatalytic decolourization of Rhodamine-B dye by visible light active ZIF-8/BiFeO3 composite

Cited by 15 publications

References 15 publications

Degradation of Procion brilliant yellow H‐E6G using ultrasonic and hydrodynamic cavitation combined with oxidants with demonstration at pilot scale

Degradation of Procion brilliant yellow H‐E6G using ultrasonic and hydrodynamic cavitation combined with oxidants with demonstration at pilot scale

Optimization and modeling of solar photocatalytic degradation of raw textile wastewater dyes using green ZnO-ED NPs by RSM

Degradation of pesticides using hybrid processes based on cavitation and photocatalysis: A review

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