Sonophotocatalytic treatment of rhodamine B using visible-light-driven CeO2/Ag2CrO4 composite in a batch mode based on ribbon-like CeO2 nanofibers via electrospinning

Sabzehmeidani, Mohammad Mehdi; Karimi, Hajir; Ghaedi, Mehrorang

doi:10.1007/s11356-019-04253-8

Cited by 47 publications

(8 citation statements)

References 64 publications

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“…Moreover, chemical parameters (pH-value, radical scavengers, oxidative additives, sort of pollutant, and catalyst) also influence the sonophotocatalytic degradation process. Detailed reports on these dependencies are given in several publications [7][8][9][17][18][19][20][21][22][23][24] or reviews [3,4,25,26] and are well-discussed.…”

Section: Introductionmentioning

confidence: 99%

Sonophotocatalysis—Limits and Possibilities for Synergistic Effects

et al. 2022

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Advanced oxidation processes are promising techniques for water remediation and degradation of micropollutants in aqueous systems. Since single processes such as sonolysis and photocatalysis exhibit limitations, combined AOP systems can enhance degradation efficiency. The present work addresses the synergistic intensification potential of an ultrasound-assisted photocatalysis (sonophotocatalysis) for bisphenol A degradation with a low-frequency sonotrode (f = 20 kHz) in a batch-system. The effects of energy input and suspended photocatalyst dosage (TiO2-nanoparticle, m = 0–0.5 g/L) were investigated. To understand the synergistic effects, the sonication characteristics were investigated by bubble-field analysis, hydrophone measurements, and chemiluminescence of luminol to identify cavitation areas due to the generation of hydroxyl radicals. Comparing the sonophotocatalysis with sonolysis and photocatalysis (incl. mechanical stirring), synergies up to 295% and degradation rates of up to 1.35 min−1 were achieved. Besides the proof of synergistic intensification, the investigation of energy efficiency for a degradation degree of 80% shows that a process optimization can be realized. Thus, it could be demonstrated that there is an effective limit of energy input depending on the TiO2 dosage.

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Section: Introductionmentioning

confidence: 99%

Sonophotocatalysis—Limits and Possibilities for Synergistic Effects

et al. 2022

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“…3D response surface plots are the most applicable approach applied to indicate the combined effects and identify the main interactions among factors on dye removal [28]. Response surface plots (3D) were applied to demonstrate the collective property and recognize the main interactions among variables on % removal of CR dye by Pb@ZnFe 2 O 4 adsorbent.…”

Section: Resultsmentioning

confidence: 99%

Exploration of the adsorption capability by doping Pb@ZnFe2O4 nanocomposites (NCs) for decontamination of dye from textile wastewater

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Attarde

et al. 2019

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In the present research article we explore the synthesis method and adsorption capability of ZnFe oxides nanocomposites by using Pb as dopant. A conventional and simple batch adsorption method is selected and optimized. Pb@ZnFe2O4 NCs were fabricated by facile method i.e. co-precipitation method and characterized by FESEM, XRD, IR, EDX. The removal of dye has monitored by UV method.An outstanding result is obtained as adsorption efficiency of 1042 mg g−1 shows more significant performance than currently available bench-mark adsorbents. The optimized parameters pH 7.1, Adsorbent Mass: 50 mg, Initial Dye Concentration: 150 mg/l and Agitation Time: 90 min results in 96.49 % removal of CR (Congo red) dye. A CCD (central composite design) is applied to evaluate the role of adsorption variables. Based on its excellent performance, cost effectiveness, facile fabrication and large surface area, the Pb@ZnFe2O4 has considerable potential for the manufacture of cost effective and efficient adsorbents for environmental applications.

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“…The result showed 90% of TOC removal at 100, 50, and 75 mg/L of RB5, Na 2 S 2 O 8 , and MnSO 4 under 44 W and 20 V of sonic power and applied voltage, respectively. Sabzehmeidani, Karimi, and Ghaedi (2019) fabricated a CeO 2 /Ag 2 CrO 4 composite photocatalyst for the sono‐photodegradation of rhodamine B. The results indicated ultrasound field enhanced photoactivity due to improved mass transfer and increased charged electron‐hole separation.…”

Section: Physical Treatmentmentioning

confidence: 99%