Effect of the Ag–CeO2 interaction and the nature of pore structure on the catalytic activities of different Ag–CeO2/mesoporous-SiO2 catalysts on the reduction of 4-nitrophenol

Keshri, Kumer Saurav; Chowdhury, Biswajit

doi:10.1007/s10934-022-01222-4

Cited by 3 publications

(2 citation statements)

References 67 publications

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“…Hence, an alternative global approach is highly desirable for the disposal and purification of wastewater containing organic pollutants. [10] Catalysis can play a pivotal role to overcome the challenges of water quality. Noble metal nanoparticles have gained extraordinary attention in the field of catalysis, biology, sensors, imaging and surface-enhanced Raman scattering, owing to distinctive physical, chemical and biological properties.…”

Section: Introductionmentioning

confidence: 99%

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Ultrasound‐assisted synthesis of silica‐coated magnetite material decorated with silver nanoparticles for the detoxification of 4‐nitrophenol

Prathibha

Rangasamy

Sridhar

et al. 2023

Applied Organom Chemis

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Among phenolic pollutants, 4‐nitrophenol is a common organic pollutant readily discharged in water bodies. It causes an adverse effect on the lives of human beings and aquatic species. Therefore, it is essential to remove this pollutant from water resources. Herein, we report an eco‐friendly approach for the synthesis of silica‐coated magnetite material decorated with ultra‐fine silver nanoparticles, as a magnetically recyclable catalyst for the detoxification of 4‐nitrophenol. This synthetic strategy employs only ultrasound waves throughout the preparation of catalyst material. Further, no stabilizer was added in any of the steps involved in synthesis. Initially, iron oxide nanoparticles were synthesized from ferrous sulphate heptahydrate precursor and coated with silica matrix. Subsequently, silver nanoparticles were deposited over it. Silver was chosen among the noble metal nanoparticles, as it is abundantly available and economical and exhibits good catalytic properties. This catalyst material was well characterized using HRTEM, XRD, VSM and FTIR techniques. HRTEM studies revealed that Ag nanoparticles of size between 2 and 5 nm were dispersed over the silica‐coated magnetite. The significant merits of this approach are usage of ultrasound waves, stabilizer‐free and reduced time consumption in the synthesis of catalyst. Furthermore, a facile magnetic separation of catalyst using bar magnet is noteworthy to this method. The catalyst was successfully recycled for eight times without any significant loss in the activity. This can be a promising catalyst for the treatment of wastewater contaminated with 4‐nitrophenol.

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Section: Introductionmentioning

confidence: 99%

“…Hence, an alternative global approach is highly desirable for the disposal and purification of wastewater containing organic pollutants. [ 10 ]…”

Section: Introductionmentioning

confidence: 99%

Ultrasound‐assisted synthesis of silica‐coated magnetite material decorated with silver nanoparticles for the detoxification of 4‐nitrophenol

Prathibha

Rangasamy

Sridhar

et al. 2023

Applied Organom Chemis

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Ag/Ce0.5Zr0.5O2 nanofibers: Visible light photocatalysts for degradation of p-nitrophenol

Narasimharao

Malkhasian

2022

Molecular Catalysis

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Pyridinic N anchored Ag and Au hybrids for detoxification of organic pollutants

et al. 2022

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The development of a highly reusable, non-toxic catalyst for the effective removal of 4-nitrophenol (4-NP) from marine water is a key challenge due to its diverse effects on living organisms. Herein, in situ green fabricated pyridinic N anchored Ag2O/Au decorated porous silica (CG-Ag2O/Au-SiO2) using spent coffee grounds (CG) powder is introduced as a reusable catalyst to mitigate 4-NP, Methylene blue (MB), Rhodamine 6G (R6G) and their mixture in the spiked deionized, river and marine water samples. Exceptionally high structural activity and excellent reusability of catalysts up to 15 cycles have been demonstrated due to the accessibility of a large number of active sites from pyridinic N-anchored Ag2O and Au particle surfaces. CG-Ag2O/Au-SiO2 with the lower Ag and Au contents of 0.59 and 0.11 wt% (ICP-MS) of active catalytic sites exhibit a superior activity parameter of 6000 s−1 g−1 (4-NP), 6357 s−1 g−1 (MB), and 2892 s−1 g−1 (R6G) than chemically synthesized and reported, bare and hybrid structures. Furthermore, the CG-Ag2O/Au-SiO2 shows excellent stability in marine water with promising reusability performance (≈93% after 15 successive cycles). Density functional theory (DFT) studies reveal that the observed high catalytic efficiency originates from the pyridinic N presence on the Ag2O/Au structures.

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Effect of the Ag–CeO2 interaction and the nature of pore structure on the catalytic activities of different Ag–CeO2/mesoporous-SiO2 catalysts on the reduction of 4-nitrophenol

Cited by 3 publications

References 67 publications

Ultrasound‐assisted synthesis of silica‐coated magnetite material decorated with silver nanoparticles for the detoxification of 4‐nitrophenol

Ultrasound‐assisted synthesis of silica‐coated magnetite material decorated with silver nanoparticles for the detoxification of 4‐nitrophenol

Ag/Ce0.5Zr0.5O2 nanofibers: Visible light photocatalysts for degradation of p-nitrophenol

Pyridinic N anchored Ag and Au hybrids for detoxification of organic pollutants

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