Surface modified of polyacrylonitrile nanofibers by TiO2/MWCNT for photodegradation of organic dyes and pharmaceutical drugs under visible light irradiation

Khalil, Alaa; Nasser, Walaa S.; Osman, T. A.; Toprak, Muhammet S.; Muhammed, Mamoun; Uheida, Abdusalam

doi:10.1016/j.envres.2019.108788

Cited by 43 publications

(20 citation statements)

References 50 publications

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“…2d shows the Raman spectra of the PAN, CNT, TiO 2 , and PAN-CNT/TiO 2 -NH 2 composite nanofibers. The result shows that the composite nanofibers contain all the characteristic peaks of PAN, CNT, and TiO 2, confirming the successful fabrication of the composite nanofiber membrane [32,33].…”

Section: Resultssupporting

confidence: 53%

Rapid photocatalytic degradation of phenol from water using composite nanofibers under UV

et al. 2020

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Background The removal of phenol from aqueous solution via photocatalytic degradation has been recognized as an environmentally friendly technique for generating clean water. The composite nanofibers containing PAN polymer, CNT, and TiO2 NPs were successfully prepared via electrospinning method. The prepared photocatalyst is characterized by SEM, XRD, and Raman spectroscopy. Different parameters are studied such as catalyst amount, the effect of pH, phenol concentration, photodegradation mechanism, flow rate, and stability of the composite nanofiber to evaluate the highest efficiency of the photocatalyst. Results The composite nanofibers showed the highest photodegradation performance for the removal of phenol using UV light within 7 min. The pH has a major effect on the photodegradation of phenol with its maximum performance being at pH 5. Conclusions Given the stability and flexibility of the composite nanofibers, their use in a dynamic filtration is possible and can be even reused after several cycles.

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Section: Resultssupporting

confidence: 53%

Rapid photocatalytic degradation of phenol from water using composite nanofibers under UV

et al. 2020

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“…In past decades, parallel with the increase in population and the huge development in industrial and technological activities, the world suffers from many environmental problems. This growth has resulted in the formation of large contents of hazard compounds [1]. Many of these compounds are toxic, mutagenic and carcinogenic and may pose a threat to human life and environment [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

Zeid

Ibrahem

Mohamed

et al. 2020

Mater. Res. Express

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CuO (S1) Single pure component nanoparticles (SPCNPs), Ag/CuO (S2) binary component hybrid nanoparticles (BCHNPS), Co1/Ag/CuO (S3), and Co2/Ag/CuO (S4) ternary component hybrid nanoparticles (TCHNPS) were synthesized via co-precipitation method. Several spectroscopic methods investigated the characterization of the prepared catalysts. Based on Crystal properties, CuO exhibit a monoclinic phase (tenorite); the grain size of the prepared samples was 28.15 nm, 29.42 nm, 27.86 nm, and 26.67 nm for S1, S2, S3, and S4 respectively. The addition of different content from Co as a dopant to silver decorated CuO gives a clear change to a flake shape. The presence of the IR absorption peaks in the region 400-600 cm −1 matched to the distinctive stretching vibrations of Cu-O bonds in the monoclinic phase structure of CuO. Disappearance of the Raman peaks of CuO and appearing of the new characteristic peaks of cobalt oxide confirms the doping process. Using DRS analysis, arrange of the bandgap values were S1 > S2 > S3 > S4. For the synthetic methyl orange and raw industrial dye, the photodegradation parameters were measured. The results show the excellent activity of Co2/Ag/CuO NPS compared with other samples. Electrical studies of the catalysts show a higher value for the dielectric constant in the higher and lower frequency regions for the sample S4. The hopping process of the charge carrier's improving as a result of the increase of applied field frequency which leads to an increase in the material conductivity.

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“…Therefore, a lot of methods have been used to remove Cr(VI) from wastewater such as ion exchange [5,6], adsorption [7,8], photocatalyst [9,10], membrane separation [11,12], coagulation and precipitation [13,14], and solvent extraction [15]. Photocatalysts are commonly considered as the most promising and frequently used feasible strategy, owing to its easy operation, eco-friendly, low cost, regeneration, and high performance when compared to other approaches [16,17]. Various photocatalyst for the removal of Cr (VI) have been investigated, including active carbon [18], metal oxide nanoparticles [19,20], synthesized polymer beads [21] and agriculture waste [22].…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Visible Light Photodegradation of Cr(VI) Using Electrospun MWCNTs-Fe3O4@PES Nanofibers

et al. 2021

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The development of highly efficient photocatalysis has been prepared by two different methods for the photodegradation of Cr(VI) from an aqueous solution under visible light. The electrospun polyethersulfone (PES)/iron oxide (Fe3O4) and multi-wall carbon nanotubes (MWCNTs) composite nanofibers have been prepared using the electrospinning technique. The prepared materials were characterized by SEM and XRD analysis. The result reveals the successful fabrication of the composite nanofiber with uniformly and smooth nanofibers. The effect of numerous parameters were explored to investigate the effects of pH value, contact time, concentration of Cr(VI), and reusability. The MWCNTs-Fe3O4@PES composite nanofibers exhibited excellent photodegradation of Cr(VI) at pH 2 in 80 min. The photocatalysis materials are highly stable without significant reduction of the photocatalytic efficiency of Cr(VI) after five cycles. Therefore, due to its easy separation and reuse without loss of photocatalytic efficiency, the photocatalysis membrane has tremendous potential for the removal of heavy metals from aqueous solutions.

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Surface modified of polyacrylonitrile nanofibers by TiO2/MWCNT for photodegradation of organic dyes and pharmaceutical drugs under visible light irradiation

Cited by 43 publications

References 50 publications

Rapid photocatalytic degradation of phenol from water using composite nanofibers under UV

Rapid photocatalytic degradation of phenol from water using composite nanofibers under UV

Study the influence of silver and cobalt on the photocatalytic activity of copper oxide nanoparticles for the degradation of methyl orange and real wastewater dyes

Highly Efficient Visible Light Photodegradation of Cr(VI) Using Electrospun MWCNTs-Fe3O4@PES Nanofibers

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