Degradation of furfural in contaminated water by titanium and iron oxide nanophotocatalysts based on the natural zeolite (clinoptilolite)

Esmaili, Z.; Nazar, Ali Reza Solaimany; Farhadian, Mehrdad

doi:10.24200/sci.2017.4106

Cited by 5 publications

(3 citation statements)

References 25 publications

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“…This is likely due to the fact that increasing the furfural concentration leads to the saturation of active sites on the nano photocatalyst, making it less effective at degrading furfural. Consequently, SO 4 °− and OH ° radical generation is diminished [ 35 ]. Elevating the furfural concentration can reduce the number of photons reaching the nanophotocatalyst surface [ 36 ].…”

Section: Resultsmentioning

confidence: 99%

Persulfate-assisted heterogeneous photocatalytic degradation of furfural from aqueous solutions using TiO2–ZnO/biochar composite

Hasanzadeh,

Ghaedrahmat,

Kayedi

et al. 2023

Heliyon

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Section: Resultsmentioning

confidence: 99%

Persulfate-assisted heterogeneous photocatalytic degradation of furfural from aqueous solutions using TiO2–ZnO/biochar composite

Hasanzadeh,

Ghaedrahmat,

Kayedi

et al. 2023

Heliyon

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“…These photoinduced e/h pairs can begin subsequent attacks the molecules of the pollutant to degrade them. They also can react with the dissolved oxygen and water molecules to produce the superoxide and hydroxyl radicals, respectively, as powerful oxidizing center to attack the pollutant used (Ciğeroğlu, Şahin, & Kazan, 2022;Esmaili, Solaimany Nazar, & Farhadian, 2017;Nam, Woo, & Han, 2009).…”

Section: Introductionmentioning

confidence: 99%

Study of the mechanism pathway of sulfasalazine degradation on a novel quadripartite visible-light-driven photocatalyst

Omrani,

Nezamzadeh-Ejhieh

2024

Preprint

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A novel coupled Cu2O-CdS-BiVO4-WO3 quadripartite nanoscale catalyst was prepared and characterized by XRD, SEM-DX, x-ray mapping, and DRS techniques. Its pHpzc was also determined to be about 9. The photodegradation experiments were designed via RSM. The optimal run in the photodegradation of sulfasalazine (SSZ) included the CSSZ: 7 mg/L, pH 6.25, 30 min irradiation time, 0.45 g/L of the catalyst dose, by a catalyst with a Cu2O-CdS-BiVO4-WO3 mole ratio 3:1:1:1 under visible light illumination. The effects of the scavenging agents were also studied, and the results confirmed the critical role of superoxide in SFSZ photodegradation and the hydroxyl radicals. The photodegradation pathway obeyed the direct Z-scheme mechanism, which involved three successive binary Z-scheme components involving WO3-BiVO4, BiVO4-CdS, and CdS-Cu2O, which accumulates the photoinduced electrons in the CB-Cu2O and the holes in the VB-WO3, the more powerful reducing and oxidizing centers, respectively.

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“…Being 5C unit which could be further converted to furfural, furan, furfurylic acid, or furoic acid, xylose is a very important platform chemical. It was reported furfural could be produced from agricultural and forestry waste [186][187][188][189][190][191][192][193][194][195][196]. Furfural yield of 72% could be accomplished over zeolite embedded siliceous TUD-1 mesoporous matrix [197,198].…”

Section: )5-hydroxymethylfurfural (Hmf) Hmf Has Been Examined Extenmentioning

confidence: 99%

Biomass conversion and upgrading over carbon catalyst

Chen¹

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Biomass conversion and upgrading are promising solutions for energy shortage and environment problems. Located in Southeast Asia, Singapore is surrounded by abundant biomass resource in its neighboring countries. However, most of the biomass feedstock is underutilization. Cellulose, which represents the most abundant biomass resource, has been examined over noble metal supported carbon catalyst as an example of biomass conversion. As a Johnson Matthey (JM) supported program, we examined cellulose hydrogenation over Pt/AC produced from JM by the trial-and-error method. After tuning the reaction conditions, a sorbitol yield up to 25% is obtained. We also proposed a novel and effective catalyst optimization method which can further improve the sorbitol yield to 50% by further reducing the Pt/AC in ethylene glycol. This catalytic performance improvement is attributed to the effect of particle size according to XRD and TEM results. CV scans of the Pt/AC indicate that the decline of platinum's oxidation and reduction activity after EG treatment may suppress the side reactions during cellulose hydrogenation, hence improve sorbitol yield. Ruthenium has been proved as an ideal catalyst in biomass conversion, especially for cellulose hydrogenation. However, studies of such reactions are extremely time-consuming due to the numerous side reactions and the complexity of interactions among reaction parameters. In this work, we introduced multivariate analysis method for the study of cellulose hydrogenation. The effect of temperature, hydrogen pressure, catalyst amount and ruthenium loading were comprehensively explored based on a response surface design III (RSD). Among all the 26 hydrogenation reactions, the highest sorbitol yield of 71.9% was obtained. The reaction data was then used to produce a regression model which shows strong statistical significance and high accuracy. Though this model, we evaluated the effectiveness of all the reaction parameters. It was found that ruthenium loading and temperature were the two main driving forces for sorbitol yield. High sorbitol yield could only be obtained while ruthenium loading and temperature were well tuned. The synergistic effects among reaction parameters were well presented with the help of contour plots and surface plots generated from the model. Lastly, a prediction formula according to the reaction data was constructed to predict the sorbitol yield under other reaction conditions. Sorbitol, which is the main product of cellulose hydrogenation, has been examined over sulfonated carbon catalysts as an example of biomass upgrading. The sulfonated carbon catalysts show high catalytic activity towards the synthesis of isosorbide from sorbitol, with a yield up to 60% with negligible performance loss for five consecutive runs. The sulfuric groups are identified as the main active sites for sorbitol dehydration. The physical and chemical properties of the catalysts are evaluated by advanced and extensive characterization techniques, such as XRD, TEM, SEM, BET, FTIR, EA, EDAX, TG...

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Degradation of furfural in contaminated water by titanium and iron oxide nanophotocatalysts based on the natural zeolite (clinoptilolite)

Cited by 5 publications

References 25 publications

Persulfate-assisted heterogeneous photocatalytic degradation of furfural from aqueous solutions using TiO2–ZnO/biochar composite

Persulfate-assisted heterogeneous photocatalytic degradation of furfural from aqueous solutions using TiO2–ZnO/biochar composite

Study of the mechanism pathway of sulfasalazine degradation on a novel quadripartite visible-light-driven photocatalyst

Biomass conversion and upgrading over carbon catalyst

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