Structural, morphological and dielectric investigations on NiO/CuO/ZnO combined semiconductor metal oxide structures based ternary nanocomposites

Srinivasan, M.; Punithavelan, N.

doi:10.1088/2053-1591/aad079

Cited by 28 publications

(8 citation statements)

References 31 publications

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“…The antibacterial activity of ZnO-NiO-CuO NCPs was evaluated following the disc diffusion method. 32,[34][35][36] Two Gram-positive strains (S. aureus and B. subtilis) and two Gram-negative strains (E. coli and P. aeruginosa) of bacteria were used for this study. The bacterial strains were grown in nutritional agar for 24 hours at 4 °C, and the turbidity of the cultures was controlled with saline solution (0.9% NaCl) and maintained at 108 CFU (colony forming unit).…”

Section: Antibacterial Activitymentioning

confidence: 99%

Fabrication of ternary metal oxide (ZnO:NiO:CuO) nanocomposite heterojunctions for enhanced photocatalytic and antibacterial applications

Ishaque,

Zaman,

Arif

et al. 2023

RSC Adv.

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Section: Antibacterial Activitymentioning

confidence: 99%

Fabrication of ternary metal oxide (ZnO:NiO:CuO) nanocomposite heterojunctions for enhanced photocatalytic and antibacterial applications

Ishaque,

Zaman,

Arif

et al. 2023

RSC Adv.

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“…Among many metal oxide semiconductors, ZnO nanomaterials (naturally formed as n -type semiconductors with a band gap of 3.4 eV) have excellent performance in photocatalytic processes because of their high photosensitivity, high photocatalytic activity, suitable bandgap, low cost, and environmental friendliness [ 18 ]. In addition, NiO [ 19 , 20 , 21 ] is a p -type semiconductor with a band gap of 3.5 eV [ 22 ], and it has a lattice mismatching degree with n -type ZnO, which is beneficial for the formation of pn heterojunctions [ 23 ]. This establishes a built-in electric field in the heterojunction to facilitate the separation of charges and improve photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Improved Photocatalytic Activity via n-Type ZnO/p-Type NiO Heterojunctions

Chen

et al. 2022

Nanomaterials

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The design and construct pn heterojunction to reduce the recombination rate of photogenerated electron-hole pairs can effectively improve photocatalytic activity. In this study, ZnO/NiO heterojunctions were fabricated by annealing a Zn/Ni metal organic framework precursor synthesized via coprecipitation. The effects of the precursor annealing temperature on the microstructure, morphology, and optical properties of the ZnO/NiO nanocomposites were investigated using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV-vis absorption spectroscopy. The results showed that the nanocomposite was composed of hexagonal wurtzite ZnO and cubic NiO, with the former being the dominant phase. Large ZnO nanoparticles were attached to small NiO nanoparticles, and a pn heterojunction interface was formed. The photodegradation performance of the nanomaterials was evaluated by monitoring the degradation of RhB under irradiation by ultraviolet light. The ZnO/NiO nanocomposites exhibited excellent photocatalytic activity when the annealing temperature was 550 °C. The photodegradation mechanism was also analyzed in detail, revealing that the heterojunction between the n-type ZnO and the p-type NiO played an important role in impeding the recombination of photogenerated electron-hole pairs and improving the photocatalytic efficiency.

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“…Figure 6(b) represented the FTIR spectra related to the pure ZnO, ZnO/CuO and ZnO/CuO/Ag 2 O nanocomposites in the range of 400-4,000 cm À1 . The FTIR broad bands observed at 3,400-3,500 cm À1 are allocated to the stretching vibrations of the O-H bond on the surface of samples (Srinivasana & Punithavelan 2017) while the bands at ≈1,650 cm À1 have been endorsed to the O-H bending mode of adsorbed water molecules (Figure (b)). Additionally, the sharp FTIR band observed at 442 cm À1 are corresponded to the Zn-O bond vibration and confirm the formation ZnO nanoparticles (Tan et al 2019).…”

Section: Resultsmentioning

confidence: 98%

Facile synthesis of ZnO/CuO/Ag2O ternary metal oxide nanocomposite for effective photodegradation of organic water pollutants

Meena

Poswal

Surela

et al. 2021

Water Science and Technology

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The current study is focused on fabrication of a ternary metal oxide nanocomposite (ZnO/CuO/Ag2O) as an efficient and superior photocatalyst by step wise implanting of p-type of CuO and Ag2O semiconductors onto n-type of semiconductor (ZnO) via chemical method. The structural and textural characteristics of manufactured samples were characterized by X-ray diffraction (XRD), Fourier Transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy combine electron dispersive spectroscopy (FESEM-EDS) and UV-vis spectroscopy. The photocatalytic performance of the fabricated ternary nanocomposite was tested against the photocatalytic degradation of Crystal violet (CV) and Rhodamine B (RhB) organic dyes under solar light irradiation. The ternary nanocomposite demonstrated about 99.05% and 97.38% degradation efficiencies for CV and RhB dyes under solar light irradiation in a time period of 105 min. The calculated rate constants (k, min−1) for degradation under solar light over the ZnO/CuO/Ag2O nanocomposite were 4.26 and 3.61 times higher than the k value obtained over ZnO nanoparticles for CV and RhB dyes, respectively. The main reactive species taken part in the photodegradation processes were •OH and •O2− over ZnO/CuO/Ag2O photocatalyst under solar light illumination. Further the recycle experiments confirm good reusability and photo-stability of ZnO/CuO/Ag2O ternary nanocomposite.

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Structural, morphological and dielectric investigations on NiO/CuO/ZnO combined semiconductor metal oxide structures based ternary nanocomposites

Cited by 28 publications

References 31 publications

Fabrication of ternary metal oxide (ZnO:NiO:CuO) nanocomposite heterojunctions for enhanced photocatalytic and antibacterial applications

Fabrication of ternary metal oxide (ZnO:NiO:CuO) nanocomposite heterojunctions for enhanced photocatalytic and antibacterial applications

Improved Photocatalytic Activity via n-Type ZnO/p-Type NiO Heterojunctions

Facile synthesis of ZnO/CuO/Ag2O ternary metal oxide nanocomposite for effective photodegradation of organic water pollutants

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