Solar photocatalytic degradation of phenol using nanosized ZnO and -Fe2O3

Hamza, Abdulhamid; J.T, Fatuase; Waziri, Saidu M.; Ajayi, OA

doi:10.5897/jcems2013.0162

Cited by 17 publications

(1 citation statement)

References 10 publications

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“…In visible light irradiation, the improved photodegradation activity of the 2%Pd@mTiO2 catalyst could be attributed to a combination of factors such as the increased absorbance in the visible region, the higher specific surface area, and the reduced electron-hole pair recombination rate. The photocatalytic degradation of organic pollutants is often determined by using pseudo-first-order kinetics [47][48][49]. The initial rate of phenol degradation was determined after the first 20 min of the reaction, assuming pseudo-first-order kinetics with respect to the phenol concentration.…”

Section: Photocatalytic Degradation Of Phenol Using Batch Photoreactormentioning

confidence: 99%

Continuous Flow Photocatalytic Degradation of Phenol Using Palladium@Mesoporous TiO2 Core@Shell Nanoparticles

Yilleng,

Artioli,

Rooney

et al. 2023

Water

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Palladium@mesoporous titania core@shell nanoparticles with uniform and narrow particle size distribution were synthesised using a four component ‘‘water in oil’’ microemulsion system. The prepared materials were well characterised using N2 adsorption–desorption measurements, temperature program oxidation, X-ray diffraction, ICP-OES, DRS UV-Vis, PL, TGA and transmission electron microscopy techniques. The core@shell nanoparticles showed very good absorption in both the UV and visible regions and a low bandgap, indicating that the prepared materials are visible-light-active, unlike the pristine TiO2 P25. The activity of the prepared materials was evaluated in the photodegradation of phenol using both UV and visible light, in batch and continuous flow trickle-bed and Taylor flow photoreactors. The prepared 2%Pd@mTiO2 core@shell nanoparticles showed better photocatalytic performance for phenol degradation in visible light in comparison to pristine TiO2 P25 and conventional 0.5%Pd/TiO2 P25 catalysts. The TiO2 P25 and conventional 0.5%Pd/TiO2 P25 catalysts showed gradual catalyst deactivation due to photocorrosion, the deposition of intermediates and Pd metal leaching. In comparison, the 2%Pd@mTiO2 catalyst showed higher catalyst stability and reusability. The 2%Pd@mTiO2 catalysts showed very high and stable phenol degradation (97% conversion) in continuous flow over 52 h. The results showed the feasibility of utilising the developed continuous Taylor flow photoreactor for phenol degradation or as a wastewater treatment plant.

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Section: Photocatalytic Degradation Of Phenol Using Batch Photoreactormentioning

confidence: 99%

Continuous Flow Photocatalytic Degradation of Phenol Using Palladium@Mesoporous TiO2 Core@Shell Nanoparticles

Yilleng,

Artioli,

Rooney

et al. 2023

Water

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Synthesis of novel Fe3O4@SiO2@Er2TiO5 superparamagnetic core–shell and evaluation of their photocatalytic capacity

Gandomi

Sobhani‐Nasab

Pourmasoud

et al. 2020

J Mater Sci: Mater Electron

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Solar Photocatalysis for the Decontamination Of Water from Emerging Pharmaceutical Pollutant Chloroquine Using Nano ZnO as the Catalyst

Gayathri

Nair

Gopinath

et al. 2023

Water Air Soil Pollut

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Photo-driven advanced oxidation process (AOP) with pharmaceutical wastewater has been poorly investigated so far. This paper presents the results of an experimental investigation on the photocatalytic degradation of emerging pharmaceutical contaminant chloroquine (CLQ) in water using zinc oxide (ZnO) nanoparticles as the catalyst and solar light (SL) as the source of energy. The catalyst was characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), scanning electron microscopy-energy dispersive X-ray analysis (SEM-EDAX), and transmission electron microscopy (TEM). The effect of various operating parameters such as catalyst loading, the concentration of target substrate, pH, and the effect of oxidants and anions (salts) on the efficiency of degradation was tested. The degradation follows pseudo-first-order kinetics. Surprisingly, contrary to the observation in most photocatalytic studies, the degradation is more efficient under solar radiation, with 77% under solar (SL) irradiation and 65% under UV light in 60 min. The degradation leads to slow and complete COD removal through several intermediates identified by the liquid chromatography–mass spectrometry (LC-MS) technique. The results suggest the possibility of using inexpensive natural, non-renewable solar energy for the purification of CLQ-contaminated water, thereby enabling the reuse of scarce water resources. Graphical Abstract

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Solar photocatalytic degradation of phenol using nanosized ZnO and -Fe2O3

Cited by 17 publications

References 10 publications

Continuous Flow Photocatalytic Degradation of Phenol Using Palladium@Mesoporous TiO2 Core@Shell Nanoparticles

Continuous Flow Photocatalytic Degradation of Phenol Using Palladium@Mesoporous TiO2 Core@Shell Nanoparticles

Synthesis of novel Fe3O4@SiO2@Er2TiO5 superparamagnetic core–shell and evaluation of their photocatalytic capacity

Solar Photocatalysis for the Decontamination Of Water from Emerging Pharmaceutical Pollutant Chloroquine Using Nano ZnO as the Catalyst

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