Enhanced Photodegradation of Phenol by ZnO Nanoparticles Synthesized through Sol-gel Method

Yusoff, Nik Athirah; Ho, Li-Ngee; Ong, Soon‐An; Wong, Yee‐Shian; Khalik, WanFadhilah; Ridzwan, Muhammad Fahmi

doi:10.17576/jsm-2017-4612-28

Cited by 11 publications

(1 citation statement)

References 23 publications

(31 reference statements)

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“…The photocatalytic performance of the Fe 2 O 3 and modified Fe 2 O 3 was then evaluated for degradation of phenol in the absence and presence of other pollutants, which were urea, formaldehyde, or a mixture of urea and formaldehyde under UV and visible light irradiation. Phenol constitutes one of the toxic compounds from industrial wastes such as from pulp and paper industry, mining and coal combustion, and palm oil industry (Yusoff et al 2017). Besides phenol, other organic pollutants also exist in the wastes and thus, efforts to degrade phenol in the presence of other pollutants would be also an important approach.…”

Section: Introductionmentioning

confidence: 99%

Cyanamide-Modified Iron(III) Oxide Photocatalysts for Degradation of Phenol in the Presence of Urea and Formaldehyde

Roslan¹,

Lintang²,

Yuliati³

2021

JSM

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Cyanamide as the source of carbon and nitrogen was used to modify iron(III) oxide (Fe2O3) photocatalyst. While X-ray diffraction (XRD) patterns confirmed that the cyanamide-modified Fe2O3 photocatalysts have comparable crystallinity to that of the unmodified Fe2O3, the diffuse reflectance ultraviolet-visible (DR UV-vis) spectra obviously showed additional light absorption around 500-800 nm on the cyanamide-modified Fe2O3, resulting in a better absorption capability under visible light irradiation. The presence of cyanamide modifier decreased the fluorescence emission intensity of Fe2O3, implying the reduced electron-hole recombination on the Fe2O3 and/or blocked emission sites by the modifier. The presence of carbon and nitrogen on the modified Fe2O3 photocatalysts was confirmed by the elemental analyzer. Photocatalytic activities of Fe2O3 and cyanamide-modified Fe2O3 were then evaluated for degradation of phenol under UV and visible light irradiation. Modification of Fe2O3 with cyanamide significantly improved the degradation of phenol from 30 to 75% under UV light irradiation and from 0 to 80% under visible light irradiation. Photocatalytic degradation of phenol was also investigated in the presence of urea or formaldehyde or both urea and formaldehyde. Even though the percentage of phenol degradation decreased in the presence of other pollutants, it was demonstrated that cyanamide modified iron(III) oxide photocatalysts still gave good activity towards degradation of phenol even in the presence of other organic pollutants.

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Section: Introductionmentioning

confidence: 99%

Cyanamide-Modified Iron(III) Oxide Photocatalysts for Degradation of Phenol in the Presence of Urea and Formaldehyde

Roslan¹,

Lintang²,

Yuliati³

2021

JSM

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Application of TiO2 and ZnO nanoparticles immobilized on clay in wastewater treatment: a review

et al. 2020

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Increase in industrial and anthropogenic activities leads to a decline in water quality. This necessitates the need for the removal of contaminants from industrial and domestic wastewater. Clay minerals are naturally abundant and non-toxic materials that found to be useful for remediation of emerging contaminants from wastewater. This review paper presents an insight into clay, the simplest material (in solgel techniques) for the synthesis of TiO 2 and ZnO, mechanisms of their reactions, analytical techniques used for characterizations, and their nanocomposites for wastewater treatment. Nanomaterials, such as nanoclay, titanium, and zinc oxide, have offered the opportunities of sequestering variety of pollutants in wastewater. TiO 2 and ZnO anchored on clay have been found to be good promising sequesters and have been explored for wastewater remediation via nanotechnology. This water treatment method includes adsorption/absorption, photocatalysis, and microbial disinfection. These nanocomposites provide more active surface sites and reduce the agglomeration of the nanoparticles, but leaching has been their shortcomings. To overcome this, the filtration technique may become significant for the removal and avoidance of fouling of wastewater. This can be achieved through the fabrication of nano-based filters using the nanocomposites.

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Recent progress in visible light-doped ZnO photocatalyst for pollution control

Zheng

Abdullah

Chung

et al. 2022

Int. J. Environ. Sci. Technol.

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Enhanced Photodegradation of Phenol by ZnO Nanoparticles Synthesized through Sol-gel Method

Abstract: Zinc oxide (ZnO)

Cited by 11 publications

References 23 publications

Cyanamide-Modified Iron(III) Oxide Photocatalysts for Degradation of Phenol in the Presence of Urea and Formaldehyde

Cyanamide-Modified Iron(III) Oxide Photocatalysts for Degradation of Phenol in the Presence of Urea and Formaldehyde

Application of TiO2 and ZnO nanoparticles immobilized on clay in wastewater treatment: a review

Recent progress in visible light-doped ZnO photocatalyst for pollution control

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