Development of EPA/ZnO nanocomposites: Structural, physical, and electrochemical studies

Chavhan, Jitendra; Rathod, Ramesh Chandra; Tandon, Vipin; Gupta, Syamasri; Malav, Jeetendra Kumar

doi:10.1016/j.surfcoat.2022.128846

Cited by 5 publications

(2 citation statements)

References 28 publications

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“…ZnO is a semiconductor material that exhibits remarkable properties, making it suitable for white light emitting diode(WLED) It is a semiconductor of having a wide band gap with a high level of exciton binding energy, which allows it to emit ultraviolet (UV) light efficiently when it is excited by an IOP Publishing doi:10.1088/1755-1315/1285/1/012034 2 electric current [1][2]. In (WLEDs, ZnO acts as a key component in the blue or near-UV emission spectrum [3][4][5]. To generate white light in WLEDs, a phosphor layer is used over the ZnO layer.…”

Section: Introductionmentioning

confidence: 99%

Defect Induced high-color-rendering white light emissions from Ag-doped ZnO

Jayaprakash,

Bakshi,

Rani

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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It is crucial to find high-quality white-light phosphors that are simple to synthesize in order to create efficient lighting. In this pursuit, the focus has been on achieving the emission of white light in ZnO and Ag-doped ZnO emerging as a promising phosphor candidate. The optimized ZnO nano phosphors demonstrated visible-light emission with ideal Commission international de I E “Eclairage frequently abbreviated as coordinates (x = 0.33, y = 0.33 ) and a correlated color temperature of 6200 K, and a color rendering index of 100 for equivalent to day white light. Furthermore, under certain ideal processing conditions, neutral white-light emission (x = 0.33, y = 0.33 at λex = 280 and 370 nm) with a Color correlated temperature (CCT) of 5500 K(approx.) was achieved. The Color Rendering Index (CRI) of the ZnO and Ag:ZnO nanoparticles exceeded 90, with high values approaching 96%, which is necessary for accurately portraying object colors in comparison to natural sunshine. The research findings revealed a decrease in the FS emission intensity with all the UV excitation when Ag doped in ZnO, which aligns well with the principles of Stern-Volmer quenching. A reduction in intensity was observed which may be due to the Ag dopant interacting with the luminescent nanoparticles and causing a reduction in their emitted light. The study successfully develops and optimizes ZnO-based nano phosphors with tailored white-light emission characteristics, presenting a promising solution for achieving energy-efficient and high-quality white-light sources for various lighting applications.

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Section: Introductionmentioning

confidence: 99%

Defect Induced high-color-rendering white light emissions from Ag-doped ZnO

Jayaprakash,

Bakshi,

Rani

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…ZnO nanoparticles and other nanoparticles are also widely used in various fields because of their distinctive physical and chemical properties. They have been widely used recently in the polymer industry, as they can provide corrosion resistance to polymer composites and improve the polymer's high performance in terms of hardness, weight, and aging resistance [11].…”

Section: ■ Introductionmentioning

confidence: 99%

ZnO-Loaded SA-g-Poly (AC-co-EBS) Hydrogel Nanocomposite as an Efficient Adsorption of Tetracycline and Phenol: Kinetics and Thermodynamic Models

Aljeboree,

Al-Hussainawy,

Altimari

et al. 2024

Indones. J. Chem.

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A synthetic superabsorbent polymer hydrogel nanocomposite was prepared by the free radical graft co-polymerization method. This study included the preparation of two surfaces: first sodium alginate-g-(acrylic acid-co-sodium; 4-ethenylbenzenesulfonate), SA-g-poly (Ac-co-EBS) hydrogel, and second surface hydrogel after zinc oxide loading SA-g-poly (Ac-co-EBS). Hydrogel nanocomposite was prepared from different monomers for the removal of pollutants. The physical characterizations of nanocomposite have been studied using several techniques like UV-vis, FTIR, FE-SEM, TEM, EDX, and XRD. The data from the adsorption study show that E% increases with increasing contact time, with the best agitation time of 1 h, after which the adsorption becomes constant. The increase in adsorbent amount 0.01–0.1 g, the percentage removal of tetracycline (TC) and phenol (PH) increased from 60.639–97.085 and 487.71–94.05%, respectively, and Qe decreased 606.39–97.08 to 487.1831–94.456 mg/g on hydrogel. The ∆H value is endothermic. All processes of adsorption are considered spontaneous, from a negative value of ∆G to a positive value of ∆S. The release of the TC drug was studied in conditions similar to those in the human body in terms of acidity and temperature. The cumulative release of TC drug in 3 h was 50.65%, 42.33%, pH = 7.5 and pH 1.2, respectively.

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