Physics of Ce3+↔Ce4+ electronic transition in phytosynthesized CeO2/CePO4 nanocomposites and its antibacterial activities

Noor, Manifa; Mamun, Md. Abdullah Al; Ullah, Asmat; Matsuda, Atsunori; Kawamura, Go; Hakim, M. A.; Islam, Md. Fakhrul; Matin, Md. Abdul

doi:10.1016/j.jpcs.2020.109751

Cited by 26 publications

(12 citation statements)

References 64 publications

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“…Nanocomposites hold both extraordinary characteristics of nanomaterials and polymer advantages including, chemical resistance, high conductivity, biocompatibility and elasticity [2]. The recent progress in scientific areas, such as chemical engineering [3], biochemistry [4] and physics [5], require the development of novel sensing technologies that combine lower power utilization and miniaturization with highly tactile sensitivity. Nanocomposites are also nanostructures with high activities that exhibit unusual significant combinations and unique engineering possibilities.…”

Section: Introductionmentioning

confidence: 99%

New Construction of Functionalized CuO/Al2O3 Nanocomposite-Based Polymeric Sensor for Potentiometric Estimation of Naltrexone Hydrochloride in Commercial Formulations

2021

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Electrically conductive polymeric nanocomposites with nanoparticles are adaptable types of nanomaterials that are prospective for various applications. The extraordinary features of copper oxide (CuO) and aluminium oxide (Al2O3) nanostructures, encourages extensive studies to prospect these metal oxide nanocomposites as potential electroactive materials in sensing and biosensing applications. This study suggested a new CuO/Al2O3 nanocomposite-based polymeric coated wire membrane sensor for estimating naltrexone hydrochloride (NTX) in commercial formulations. Naltrexone hydrochloride and sodium tetraphenylborate (Na-TPB) were incorporated in the presence of polymeric polyvinyl chloride (PVC) and solvent mediator o-nitrophenyloctyl ether (o-NPOE) to form naltrexone tetraphenylborate (NTX-TPB) as an electroactive material. The modified sensor using NTX-TPB-CuO/Al2O3 nanocomposite displayed high selectivity and sensitivity for the discrimination and quantification of NTX with a linearity range 1.0 × 10−9–1.0 × 10−2 mol L−1 and a regression equation EmV = (58.25 ± 0.3) log [NTX] + 754.25. Contrarily, the unmodified coated wire sensor of NTX-TPB exhibited a Nernstian response at 1.0 × 10−5–1.0 × 10−2 mol L−1 and a regression equation EmV = (52.1 ± 0.2) log [NTX] + 406.6. The suggested modified potentiometric system was validated with respect to various criteria using the methodology recommended guidelines.

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Section: Introductionmentioning

confidence: 99%

New Construction of Functionalized CuO/Al2O3 Nanocomposite-Based Polymeric Sensor for Potentiometric Estimation of Naltrexone Hydrochloride in Commercial Formulations

2021

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“…This is likely caused by absorption by the CeO 2 -CePO 4 support, as both components have been reported to absorb in the 280 to 440 nm range (Fig. 3a) [17][18][19][20] The CeO 2 absorption peak is attributed to an electron transfer from the O 2− 2p orbital to the Ce 4+ conduction band, while the CePO 4 absorption peak represents the absorption resulting from the ligand-to-metal charge transfer from the phosphate group to the Ce 20 A Tauc plot was used to determine the apparent bandgap of the photocatalyst support 21 It was determined that the addition of phosphate into the photocatalyst support, reduced the optical bandgap from 2.91 to 2.53 eV, potentially increasing the proportion of incident photons that are able to be absorbed.…”

Section: Resultsmentioning

confidence: 96%

Enhanced hybrid photocatalytic dry reforming using a phosphated Ni-CeO2 nanorod heterostructure

et al. 2023

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Operating the dry reforming reaction photocatalytically presents an opportunity to produce commodity chemicals from two greenhouse gases, carbon dioxide and methane, however, the top-performing photocatalysts presented in the academic literature invariably rely on the use of precious metals. In this work, we demonstrate enhanced photocatalytic dry reforming performance through surface basicity modulation of a Ni-CeO2 photocatalyst by selectively phosphating the surface of the CeO2 nanorod support. An optimum phosphate content is observed, which leads to little photoactivity loss and carbon deposition over a 50-hour reaction period. The enhanced activity is attributed to the Lewis basic properties of the PO43− groups which improve CO2 adsorption and facilitate the formation of small nickel metal clusters on the support surface, as well as the mechanical stability of CePO4. A hybrid photochemical-photothermal reaction mechanism is demonstrated by analyzing the wavelength-dependent photocatalytic activities. The activities, turnover numbers, quantum efficiencies, and energy efficiencies are shown to be on par with other dry-reforming photocatalysts that use noble metals, representing a step forward in understanding how to stabilize ignoble nickel-based dry reforming photocatalysts. The challenges associated with comparing the performance of photocatalysts reported in the academic literature are also commented on.

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“…Noor et al [86] synthesized a well-controlled CeO 2 / CePO 4 nanocomposites using Artocarpus heterophyllus aqueous leaf extract as a reducing agent. In order to examine cytotoxicity, two mammalian cell lines HeLa and Vero used.…”

Section: Melt Blending Solution Blendingmentioning

confidence: 99%

“…Their study demonstrated that the phytosynthesized CeO 2 /CePO 4 nanocomposites show enhancement in antibacterial efficacy against both Gram-positive and Gram-negative bacteria as compared to the other phytosynthesized CeO 2 nanoparticles found in literature; these might be due to the increase the penetration of positively charged nanocomposites through the negatively charged bacterial cell walls that result in redox switching between Ce 3þ and Ce 4þ in CeO 2 /CePO 4 nanocomposites. The cytotoxicity analyze of CeO 2 /CePO 4 nanocomposites relieved that the cell survival rate was beyond 95%, with a concentration range from 0.5 to 3 g/l [86]. Bisht et al [87] synthesized bismuth oxybromide (BiOBr) and silver oxideloaded BiOBr Ag 2 O/BiOBr nanocomposite using the high efficient solution-based method.…”

Section: Melt Blending Solution Blendingmentioning

confidence: 99%

Recent Progress of Advanced Metal-Oxide Nanocomposites for Effective and Low-Cost Antimicrobial Activates: A Review

Birhanu

Afrasa

Hone

2023

Journal of Nanomaterials

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Pathogens with multidrug resistance have recently been responsible for widespread disease, fatalities, and economic distress. A nanomaterial with antibacterial characteristics is used to reduce the infection’s resistance. Metal-oxide nanocomposites are nanomaterials that exhibit outstanding physical and chemical characteristics. They are prime candidates for innovative functional materials with antimicrobial activity as one of their main uses. This review will summarize the current progress on the antimicrobial activity of metal-oxide nanocomposite, including widely recognized research outputs and recent findings, as these materials can overcome the limitation of the individual material due to their utterly different properties from the single materials. Additionally, it describes several metal-oxide nanocomposites that are produced using various methods for the application of antimicrobial activity, as well as the variables that can affect such activities and the main inhabitation mechanisms of this materials.

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Physics of Ce3+↔Ce4+ electronic transition in phytosynthesized CeO2/CePO4 nanocomposites and its antibacterial activities

Cited by 26 publications

References 64 publications

New Construction of Functionalized CuO/Al2O3 Nanocomposite-Based Polymeric Sensor for Potentiometric Estimation of Naltrexone Hydrochloride in Commercial Formulations

New Construction of Functionalized CuO/Al2O3 Nanocomposite-Based Polymeric Sensor for Potentiometric Estimation of Naltrexone Hydrochloride in Commercial Formulations

Enhanced hybrid photocatalytic dry reforming using a phosphated Ni-CeO2 nanorod heterostructure

Recent Progress of Advanced Metal-Oxide Nanocomposites for Effective and Low-Cost Antimicrobial Activates: A Review

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