Efficiency of cerium oxide (CeO2) nano-catalyst in degrading the toxic and persistent 4-nitrophenol in aqueous solution

Keerthana, M.; Malini, T. Pushpa; Sangavi, R.

doi:10.1016/j.matpr.2021.10.082

Cited by 6 publications

(6 citation statements)

References 19 publications

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“…In this study, We use the Langmuir and Freundlich isotherm models to analyze the adsorption data, and there models are given in Eq. ( 4) (5).…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…O-Nitrophenol (ONP) is an important intermediate raw material in the manufacture of dyes [2], pesticides [3] and various industrial auxiliaries. However, every coin has two sides, ONP has been listed as one of the 129 toxic chemicals on the Priority Pollutant by the US Environmental Protection Agency (USEPA) [4] because of it's high toxicity and pollution to human body and aquatic environment [5]. The release of these chemical products into the natural environment has a serious impact on water bodies [6].…”

Section: Introductionmentioning

confidence: 99%

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Hierarchical nano-porous carbon from semi-coke via a MgO template preparation strategy for ONP adsorption

Shang

Zhang²,

Ding³

2022

E3S Web Conf.

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O-Nitrophenol(ONP) industrial wastewater causes serious harm to human body and aquatic environment. In this paper, we adopted a recycled MgO template preparation strategy to design series of semicoke derived hierarchical porous carbons. The prepared samples were characterized by N2 adsorption and desorption and scanning electron microscope. The analysis showed that the HPC-1 had a high specific surface area of 723.3m2/g with a huge pore volume of 1.64 cm3/g and exhibited remarkable adsorption capacity of 503.02 mg/g in batch adsorption test for ONP. Adsorption isotherms and adsorption kinetics revealed the adsorption mechanism of ONP molecules on HPCs surfaces, which followed the langmuir monolayer adsorption and pseudo-second-order kinetic. Furthermore, the HPC-1 exhibited good reusability and recycling performance, reflecting its great potential in practical application.

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“…In this study, We use the Langmuir and Freundlich isotherm models to analyze the adsorption data, and there models are given in Eq. ( 4) (5).…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hierarchical nano-porous carbon from semi-coke via a MgO template preparation strategy for ONP adsorption

Shang

Zhang²,

Ding³

2022

E3S Web Conf.

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“…Water contamination is one of the most common global environmental issues that has recently increased and is threatening human health and the ecosystem in general [1,2]. Among the causes of water pollution is the discharge of toxic organic pollutants such as 4-nitrophenol, which is used extensively in the synthesis of pharmaceuticals, dyes, herbicides, fungicides, corrosion inhibitors, etc [3][4][5][6][7]. To mitigate its toxicity, 4-nitrophenol is often reduced to 4-aminophenol since contrary to the former, the latter is less toxic and a commercially important intermediate.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of catalytic reduction of 4-nitrophenol using MoO₃ nanobelts incorporated SiO₂ nanocomposite fabricated by nanosecond pulsed laser ablation technique

et al. 2023

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Nanocomposites of SiO2/MoO3 having respective weight ratios of 3:1, 2:2, and 1:3 were synthesized using a nanosecond pulsed laser ablation method. The prepared samples were analyzed with UV-Vis and Raman spectroscopy, XRD, SEM, EDX, and TEM. Based on the TEM analysis, the morphology and the structure of the nanocomposites varied with the change in the ratio of MoO3, and the sample containing the highest amount of MoO3 shows a compact morphology and a higher number of nanoparticles. The band gap energy of the nanocomposites increases with an increase in MoO3 load. The nanocomposites were used in the catalytic reduction of 4-nitrophenol (4-NP) in the presence of NaBH4. The reduction time of 4-NP decreases as the amount of MoO3 increases in the nanocomposite. The rate constants were estimated at 0.0878, 0.2319, and 0.1726 min-1 for SiO2/MoO3 (3:1, 2:2, and 1:3) catalysts respectively. The results demonstrate the good catalytic performance of the prepared materials by enabling fast reduction of 4-NP.

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“…Several metal oxide nanoparticles like zinc oxide and titanium dioxide have been used as a photocatalyst in heterogeneous photocatalysis for the treatment of wastewater. Cerium oxide nanoparticles, also known as nanoceria a metal oxide of Rare Earth Elements REEs made using a lanthanide metal cerium (Keerthana et al, 2021). These particles are gaining attention recently due to their wide application and their unique properties, including their oxidation and other properties.…”

Section: Introductionmentioning

confidence: 99%

“…This oxidation state plays an important role in redox reactions and photocatalysis. The effective redox site of cerium Ce 4+ / Ce 3+ and its ability to exchange oxygen (Keerthana et al, 2021) have made nanoceria a great material for various activities, including environmental remediation. Nanoceria was found to possess multiple applications in environmental remediation and wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation and removal of type II pyrethroid pesticide (lambda-cyhalothrin) residue from wastewater using nanoceria for agricultural runoff application

Danjuma Sani,

Abbaraju,

Venugopal

2023

JANS

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Synthetic chemical pesticides' nature, mode of action, and persistence have brought about debates regarding whether the end justifies the means. Lambda-cyhalothrin is an important insecticide for farmers and households, with great accessibility and excellent action against pests and disease-carrying insects. Like other pyrethroid pesticides, Lambda-cyhalothrin targets the nervous system of insects or pests. However, its fate in the environment, especially in water and living systems, has made it crucial to explore methods of treating or degrading its residues in the environment. The present study aimed to develop a suitable method for the photocatalytic degradation and removal of Lambda-cyhalothrin (LCY) from wastewater and agricultural runoff. The nanoceria were used under natural solar irradiation without applying any scavenger chemical or buffer. This was synthesized using a simple co-precipitation method using cerium nitrate hexahydrate as a precursor. The synthesized nanoceria were characterized using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDS), Fourier Transform Infrared spectroscopy (FTIR) and particle size analysis. The average size of the particle was 27 nm. The photocatalytic degradation was conducted in batches with various pesticide concentrations exposed to different amounts of nanoceria. The initial and final concentrations of the LCY at each level were determined using Shimadzu UV spectroscopy. At optimum conditions, nanoceria was found to degrade and remove more than 63% of the initial pesticide concentration. This method can be suitable for degrading and removing pesticide residue from agricultural runoff (at source) and industrial effluents from synthetic pesticide industries.

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Efficiency of cerium oxide (CeO2) nano-catalyst in degrading the toxic and persistent 4-nitrophenol in aqueous solution

Cited by 6 publications

References 19 publications

Hierarchical nano-porous carbon from semi-coke via a MgO template preparation strategy for ONP adsorption

Hierarchical nano-porous carbon from semi-coke via a MgO template preparation strategy for ONP adsorption

Enhancement of catalytic reduction of 4-nitrophenol using MoO₃ nanobelts incorporated SiO₂ nanocomposite fabricated by nanosecond pulsed laser ablation technique

Photocatalytic degradation and removal of type II pyrethroid pesticide (lambda-cyhalothrin) residue from wastewater using nanoceria for agricultural runoff application

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Efficiency of cerium oxide (CeO2) nano-catalyst in degrading the toxic and persistent 4-nitrophenol in aqueous solution

Cited by 6 publications

References 19 publications

Hierarchical nano-porous carbon from semi-coke via a MgO template preparation strategy for ONP adsorption

Hierarchical nano-porous carbon from semi-coke via a MgO template preparation strategy for ONP adsorption

Enhancement of catalytic reduction of 4-nitrophenol using MoO3 nanobelts incorporated SiO2 nanocomposite fabricated by nanosecond pulsed laser ablation technique

Photocatalytic degradation and removal of type II pyrethroid pesticide (lambda-cyhalothrin) residue from wastewater using nanoceria for agricultural runoff application

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Enhancement of catalytic reduction of 4-nitrophenol using MoO₃ nanobelts incorporated SiO₂ nanocomposite fabricated by nanosecond pulsed laser ablation technique