Wastewater treatment by cyclodextrin polymers and noble metal/mesoporous TiO2 photocatalysts

Khaoulani, Sohayb; Chaker, Hanane; Cadet, Charles; Бычков, Е.; Chérif, L.; Bengueddach, Abdelkader; Fourmentin, Sophie

doi:10.1016/j.crci.2014.07.004

Cited by 53 publications

(26 citation statements)

References 33 publications

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“…While the doping energy level is in the band gap, long wave photon can also be absorbed. [8,9] In that way, vanadium doping enhances the absorption from UV to visible region which increases the photogenerated of electron hole pairs under visible light irradiation (See Figure 8).…”

Section: Physicochemical Characterizationmentioning

confidence: 99%

“…Consequently, there are several methods to reduce its high Eg; the first one is to identify an appropriate dopant (such as: Au, Ag, N, S, Co, Cr, Mn,…) and the second one is to change its shape to more interesting shapes such as: nanotubes, nonorodes, nanosheets…. [4][5][6]8,9] Titanate nanotubes (TiNTs) are one of the popular photocatalysts and their usage has widely been found based on the environmental governance as it shows excellent chemical stability, low cost and non-toxicity. [4,[10][11][12] The potential applications of TiNTs catalyst include water treatment, [13,14] air purification [4] and also as raw material in a coating.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Photocatalytic Degradation of Organic Pollutants and Anticorrosion of Mild Steel by Vanadium Modified Titanate Nanotubes (X%V‐TiNTs)

Ameur

Brahimi²,

Bensaada³

et al. 2020

ChemistrySelect

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The present work aims to study the anticorrosion and the photodegradation properties of titanate nanotubes (TiNTs) and vanadium doped-titanate nanotubes (V-TiNTs). Moreover, this article seeks to investigate the effect of doping TiNTs by vanadium species at different amount (2, 5 and 10 wt %). The raw materials (i.e:TiO 2 and V 2 O 5-TiO 2) are obtained by a sol gel process, while the hydrothermal treatment is chosen to achieve the hollow structure. The structural evolutions and morphological characteristics of materials have performed using various techniques such as: Scanning Electron Microscopy and Energy Dispersive X-ray (MEB/EDS), X-ray diffraction (XRD), UV-Visible in Reflection Diffuse spectroscopy (RD/UV-Vis) and Fourier Transform InfraRed spectroscopy (FTIR) analysis. However , the anticorrosion properties of the synthesized nanotubes are evaluated on mild steel corrosion in 1 N HCl using a weight loss method. All materials showed a potential inhibitor effect (up to 90 %) depending on the vanadium percentage and the inhibitor concentration. The photodegradation activity of the prepared materials is evaluated in the photodegradation of two organic pollutants: Methylene Blue (MB) and Malachite Green (MG) under UV-Visible irradiation. The obtained results underlined the improvement of photocatalytic activity of TiNTs by vanadium species. A conversion rate up to 96 % is achieved at reduced time. Therefore, the prepared materials could be suitable for the anticorrosion of mild steel and the photodegradation of organic pollutants.

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Section: Physicochemical Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Degradation of Organic Pollutants and Anticorrosion of Mild Steel by Vanadium Modified Titanate Nanotubes (X%V‐TiNTs)

Ameur

Brahimi²,

Bensaada³

et al. 2020

ChemistrySelect

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“…(B)). This decrease in the efficiency of degradation of real effluent can be related to the presence of salts and other organic chemical constituents that negatively impact the degradation efficiency at large . It can be inferred from the results (Table ) that a substantial increase was seen in pH and chloride composition while turbidity, TDS, COD, BOD, sulfate and nitrate decreased by 95, 61, 82, 86, 62 and 87% respectively after photocatalytic treatment.…”

Section: Resultsmentioning

confidence: 93%

V₂O₅/RGO/Pt nanocomposite on oxytetracycline degradation and pharmaceutical effluent detoxification

Mohan

Lim

Lee

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Antibiotics have been identified as significant pollutants owing to their adverse impact on the environment through the development of antibiotic-resistant bacteria. In a previous study, an e-waste-based reduced graphene oxide-V 2 O 5 -platinum (RGOV-Pt(1%)) nanocomposite was prepared and subsequently used for the photocatalytic degradation of oxytetracycline (OTC), a tetracycline group of antibiotics. RESULTS:This study aimed to assess the impact of additives such as H 2 O 2 , NaCl, Na 2 CO 3 , ethanol and persulfate on the photocatalytic degradation of OTC using RGOV-Pt(1%) nanocomposite. The results showed that the degradation efficiency decreased in the presence of NaCl and Na 2 CO 3 owing to the electron-hole scavenging property of their anions. Low concentrations of H 2 O 2 (up to 10 mmol L -1 ) increased the OTC degradation efficiency, whereas high concentrations decreased the OTC degradation owing to the quenching of hydroxyl radicals. However, the presence of persulfate increased the OTC degradation efficiency owing to the formation of hydroxyl radicals. Furthermore, the OTC degradation pathway was elucidated using high-performance liquid chromatography/tandem mass spectrometry (HPLC/MS/MS). The study was extended to real pharmaceutical effluent and the degradation efficiency was found to be less for real effluent (87%) in comparison with OTC (99%) in aqueous solution.CONCLUSION: RGOV-Pt(1%) photocatalyst effectively degraded OTC. An OTC degradation pathway was proposed based on the intermediates formed. The impact of additives was established. Effective real pharmaceutical effluent detoxification was observed. Thus the synthesized RGOV-Pt(1%) nanocomposite is a hopeful alternative for the removal of antibiotics in contaminated waters and sites.1.5 g L −1 (Fig. 4(C)). Almost complete degradation (99%) was observed in the absence of NaCl at the end of 60 min, while the degradation efficiency decreased to 78% with increased concentration of NaCl (1.5 g L −1 ). The decrease in the OTC degradation is J Chem Technol Biotechnol 2020; 95: 297-307

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“…The aim of the second one, ''Wastewater treatment by cyclodextrin polymers and noble metal/mesoporous TiO 2 photocatalysts'' [3] was to prepare cyclodextrin (CD) polymers from a cross-linking agent and b-CD, and to compare its efficiency vis-à -vis an emerging advanced oxidation process (AOP): photocatalysis for reducing the pollutant concentration in real wastewater effluents sampled in the output of two wastewater treatment plants (WWTPs) located in the North of France. Therefore, cross-linked cyclodextrin (CD) polymers were synthesized and a mesoporous TiO 2 was prepared by a templating sol-gel method, and modified with precious metals such as Ag, Au and Pd.…”

mentioning

confidence: 99%

International Chemical Engineering Congress 2013: From fundamentals to applied chemistry and biochemistry

Jeguirim

Limousy

2014

Comptes Rendus. Chimie

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Wastewater treatment by cyclodextrin polymers and noble metal/mesoporous TiO2 photocatalysts

Cited by 53 publications

References 33 publications

Enhanced Photocatalytic Degradation of Organic Pollutants and Anticorrosion of Mild Steel by Vanadium Modified Titanate Nanotubes (X%V‐TiNTs)

Enhanced Photocatalytic Degradation of Organic Pollutants and Anticorrosion of Mild Steel by Vanadium Modified Titanate Nanotubes (X%V‐TiNTs)

V₂O₅/RGO/Pt nanocomposite on oxytetracycline degradation and pharmaceutical effluent detoxification

International Chemical Engineering Congress 2013: From fundamentals to applied chemistry and biochemistry

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Wastewater treatment by cyclodextrin polymers and noble metal/mesoporous TiO2 photocatalysts

Cited by 53 publications

References 33 publications

Enhanced Photocatalytic Degradation of Organic Pollutants and Anticorrosion of Mild Steel by Vanadium Modified Titanate Nanotubes (X%V‐TiNTs)

Enhanced Photocatalytic Degradation of Organic Pollutants and Anticorrosion of Mild Steel by Vanadium Modified Titanate Nanotubes (X%V‐TiNTs)

V2O5/RGO/Pt nanocomposite on oxytetracycline degradation and pharmaceutical effluent detoxification

International Chemical Engineering Congress 2013: From fundamentals to applied chemistry and biochemistry

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V₂O₅/RGO/Pt nanocomposite on oxytetracycline degradation and pharmaceutical effluent detoxification