Response surface approach for visible light assisted photocatalytic degradation of ortho nitrophenol by magnetically separable TiO2/CS nanocomposite

Afzal, Saba; Julkapli, Nurhidayatullaili Muhd; Mun, Lee Kian

doi:10.1016/j.mssp.2019.04.022

Cited by 16 publications

(5 citation statements)

References 33 publications

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“…The additional peaks at 8.31°, 18.11°and 23.78°were of β-CD. [26] Debye Scherrer's equation was used to calculate the crystallite size as shown in equation (1). The calculated values were 28.76 and 25.96 nm for ZnO-β-CD nanocomposite and ZnO NPs.…”

Section: Resultsmentioning

confidence: 99%

“…Pollutants are disposed into the water bodies due to the industrial and agricultural activities, these create health hazards for living beings specially non-biodegradable one. [1] Phenols has been reported as prior and the main pollutant by National Pollutant Release Investory (NPRI) of Canada and US Environmental Protection Agency (EPA). Phenols generally found in their derivatives form such as chlorophenol, nitrophenol and Bisphenol A (BPA).…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic Degradation of Ortho‐Nitrophenol using ZnO‐β‐CD Nanocomposite

et al. 2022

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Phenolic compounds are present as pollutant in the industrial waste water. The present work deals with the photocatalytic degradation of Ortho-Nitrophenol by using Zinc oxide Nanoparticles (ZnO NPs) and its composite with β-Cyclodextrin (β-CD) represented as ZnO-β-CD. ZnO NPs were prepared by using Sol Gel Method. The morphological and structural properties were studied using SEM EDAX, PXRD, FT-IR and UV-DRS. Effect of pH was also studied. ZnO NPs degraded the Ortho-Nitrophenol up to 25.8 % and it was enhanced by the addition of β-CD up to 88.9 % in 100 minutes. Catalysts used were 1 g/L during the degradation.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Ortho‐Nitrophenol using ZnO‐β‐CD Nanocomposite

et al. 2022

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“…1 The nitrophenols and their derivatives are widely used in printing, dyeing, pesticide and pharmaceutical industries, etc. 2−4 With high biological activity and accumulation, 5 they are highly toxic and carcinogenic, threatening the health of humans and animals. 6,7 As the reduction product of nitrophenols, the aminophenols are less toxic and easily degradable, and they are important fine chemical intermediates for antipyretics, analgesics, contrast agents, etc.…”

Section: Introductionmentioning

confidence: 99%

“…The hydrogenation reaction of nitrophenols is an important conversion for fine chemical synthesis and environmental engineering . The nitrophenols and their derivatives are widely used in printing, dyeing, pesticide and pharmaceutical industries, etc. − With high biological activity and accumulation, they are highly toxic and carcinogenic, threatening the health of humans and animals. , As the reduction product of nitrophenols, the aminophenols are less toxic and easily degradable, and they are important fine chemical intermediates for antipyretics, analgesics, contrast agents, etc. , Therefore, the hydrogenation conversion of nitrophenols to aminophenols under mild conditions is a highly desirable approach. , As a typical model reaction of hydrogenation, the reduction of 4-nitrophenol (4-NP) with NaBH 4 is thermodynamically feasible in aqueous conditions at room temperature. However, it is almost impossible to proceed without a proper catalyst due to the mutual repulsion between the conjugated nitrophenol negative ion and the BH 4 – active reducing agent, which leads to a high free energy barrier. − It is important to develop efficient, stable, and environmentally friendly catalysts for the reduction of 4-NP under mild conditions.…”

Section: Introductionmentioning

confidence: 99%

Pd Atomic Engineering of Nanoporous Ni/NiO for Efficient Nitrophenol Hydrogenation Reaction

Feng

Luo

Lan

et al. 2023

ACS Appl. Mater. Interfaces

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The catalytic hydrogenation of nitrophenols is widely utilized for both industrial synthesis and environmental protection, thus efficient and costeffective catalysts are in urgent need. Still, the cost and scarcity of the materials still inhibit their application and the active sites are not well specified, especially in the complex catalysts. Herein, we developed an atomic Pd-doped nanoporous Ni/NiO (Pd 1 @np-Ni/NiO) catalyst via facial dealloying for efficient nitrophenol hydrogenation reaction under mild conditions. Pd 1 @np-Ni/NiO achieves an excellent specific activity (1301 min −1 mg Pd −1 , 35.2 times that of commercial Pd/C), nearly 100% selectivity, and continuous reproducibility. The catalytic performance is highly relevant to the Ni sites on the catalysts regarding the exposure sites and the intrinsic property. The metal/metal oxide interfacial structure could cooperatively accelerate the catalytic reaction kinetics. The atomic dopants could effectively modulate the electronic structure, facilitate the absorption of molecules, and reduce the energy barrier of catalytic hydrogenation reaction. Based on the efficient catalyst, the protype nitrophenol//NaBH 4 battery is designed for efficient material conversion and power output, which is very attractive for green energy systems.

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“…Due to its toxicity and classification as a priority pollutant that cannot exceed 0.01–2.0 μg/L, PNP removal from waterways has received enormous attention 3 . However, in the case of the majority wastewater industrial facilities, basic physiochemical and biological treatment processes are not greatly effective at extracting PNP because the aromatic ring has a nitro (NO 2 ) group that makes PNP more persistently stable and soluble in aqueous solutions 4 . Hence, the removing of PNP from wastewater is a pressing problem that must be addressed to mitigate its negative environmental and health impact.…”

Section: Introductionmentioning

confidence: 99%

Trimethylamine functionalized radiation-induced grafted polyamide 6 fibers for p-nitrophenol adsorption

Saber

Abdullah

Jamil

et al. 2021

Sci Rep

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The method of pre-irradiation grafting was used with the aid of electron beam (EB) accelerator to accomplish the grafting of polyamide 6 fibers (PA6) with glycidyl methacrylate (GMA). The extent to which GMA was grafted on PA6 was found to be markedly influenced by the absorbed dose of radiation and the reaction time of grafting. Trimethylamine (TMA) was afterwards employed for the functionalization of GMA-grafted fibers (PA6-g-GMA). A range of analyses (e.g., FTIR, FESEM, XRD, BET, and pHpzc) were carried out to determine the physiochemical and morphological properties of the fibrous adsorbent. p-Nitrophenol (PNP) adsorption from aqueous solution was conducted with the resulting TMA-(PA6-g-GMA) adsorbent. The adsorption behaviour of PNP on the fibrous adsorbent was clarified by investigating the adsorption kinetics and isotherm. According to the results, the adsorption of PNP on TMA-(PA6-g-GMA) reflected the pseudo-second order model. Meanwhile, the isotherm analysis revealed that the best description of the equilibrium data was provided by Redlich–Peterson model, followed closely by Langmuir isotherm model. The achieved adsorption capacity was highest at 176.036 mg/g. Moreover, the adsorption was indicated by the thermodynamic analysis to be spontaneous and exothermic. Regeneration and recycling of the adsorbent was possible for a minimum of five cycles with no reduction in adsorption capacity. It was concluded that the fibrous adsorbent could have applications for the removal of PNP at industrial pilot scale.

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Response surface approach for visible light assisted photocatalytic degradation of ortho nitrophenol by magnetically separable TiO2/CS nanocomposite

Cited by 16 publications

References 33 publications

Photocatalytic Degradation of Ortho‐Nitrophenol using ZnO‐β‐CD Nanocomposite

Photocatalytic Degradation of Ortho‐Nitrophenol using ZnO‐β‐CD Nanocomposite

Pd Atomic Engineering of Nanoporous Ni/NiO for Efficient Nitrophenol Hydrogenation Reaction

Trimethylamine functionalized radiation-induced grafted polyamide 6 fibers for p-nitrophenol adsorption

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