Structural, optical and photocatalytic properties of ZnO nanoparticles modified with Cu

Torres-Hernández, J.R.; Ramírez-Morales, E.; Rojas-Blanco, L.; Pantoja, Joel; Oskam, Gerko; Paraguay‐Delgado, F.; Escobar, Beatriz; Acosta-Alejandro, M.; Flores, Laura Lorena Díaz; Pérez-Hernández, G.

doi:10.1016/j.mssp.2015.02.009

Cited by 41 publications

(7 citation statements)

References 29 publications

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“…[9][10][11][12] To circumvent this problem, researchers have doped ZnO with different metals such as Cr, Sm, Co, Cu, or Ag to improve the photocatalytic activity. 13,14 Among the promising dopants, Cu is preferred due to its advanced attributes such as low toxicity and abundance. Its band gap (3.37 eV) can indeed be tuned by Cu + and/or Cu 2+ substitutions.…”

Section: Introductionmentioning

confidence: 99%

Experimental and ab initio studies on the structural, magnetic, photocatalytic, and antibacterial properties of Cu-doped ZnO nanoparticles

et al. 2023

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Section: Introductionmentioning

confidence: 99%

Experimental and ab initio studies on the structural, magnetic, photocatalytic, and antibacterial properties of Cu-doped ZnO nanoparticles

et al. 2023

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“…This may be due to the improvement of the crystallinity for the annealed films, which can be associated with a decrease in the defect density as a recombination center for the photogenerated electron-hole pairs and hence the improvement of the optical absorption of the deposited films in the UV range with the thickness as described in optical section. In previous research, the reduction in the crystalline defects with the heat treatment increases the photocatalytic activity due to the lower rate of electron-hole recombination at the defect centers [45]. Furthermore, it is noted that the photodegradation efficiency of ZnO film rises as the number of layers (film thickness) increases to the four layers and reduces as the number of layers increased to 5L.…”

Section: Photocatalytic Activity Of Nanostructured Zno Thin Filmsmentioning

confidence: 94%

Optimal thickness and annealing temperature for enhancement of structural, optical, and photocatalytic properties of ZnO thin films

2022

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Thin films of ZnO, with distinct thicknesses, were deposited on soda-lime glass substrates by sol–gel spin-coating as a cost-effective method without any evacuation facilities. The nanocrystalline structure of the deposited films was indexed by the atomic force microscope and X-ray diffraction techniques. The average grain size increases with the increase of the film thickness and annealing temperature. The energy-dispersive X-ray technique has been used to check the atomic ratios of Zn and O with the film thickness and heat treatment for homogeneous ZnO films. ZnO films show elevated transmission in the visible spectrum as a transparent semiconductor material. Optical constants, like absorption coefficient, optical band gap, and refractive index, were obtained by the Swanepoel method. All thin film samples were applied for photodegradation of reactive orange 96 (RO96) to evaluate the effect of thickness and annealing temperature on the ZnO film’s photocatalytic activity. ZnO 4L (400 °C, 3 h) film possesses the highest rate of photodegradation about 0.1 min−1 for RO96 with high stability and reusability.

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“…Salah satu material berukuran nanometer yang memiliki aktivitas fotokatalitik dan telah terbukti mampu menghambat pertumbuhan bakteri gram negatif maupun bakteri gram positif adalah Zink Oksida (ZnO) (Suresh et al, 2015). ZnO banyak dikembangkan sebagai material antibakteri karena memiliki sifat optik, elektrik, dan fotokatalitik (Tănase et al, 2021;Torres-Hernández et al, 2015). Selain itu, ZnO juga termasuk material yang non-toksik, bio-safe, dan biokompatibel (Fatimah, 2017), (Barman, 2015).…”

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Pemanfaatan Limbah Kulit Pisang Raja Nangka sebagai Capping Agent Sintesis Partikel ZnO: Variasi Pelarut Ekstraksi

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et al. 2022

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Kemunculan bakteri resisten antibiotik menjadi masalah serius di seluruh dunia. Upaya penanggulangan bakteri resisten antibiotik terus dilakukan, salah satunya dengan penggunaan material berukuran nano. Zink oksida (ZnO) merupakan salah satu partikel yang telah terbukti dapat menghambat pertumbuhan bakteri gram negatif dan gram positif. Dalam mencegah terjadinya aglomerasi pada sintesis ZnO berukuran nanometer dapat ditambahkan capping agent alami berupa senyawa metabolit sekunder pada ekstrak kulit pisang raja nangka. Adapun langkah yang dilakukan adalah: 1) ekstraksi metabolit sekunder kulit pisang raja nangka, 2) uji fitokimia, 3) penentuan kadar total flavonoid dan polifenol, 4) sintesis ZnO dengan capping agent alami ekstrak kulit pisang raja nangka, 5) karakterisasi ZnO, dan 6) uji aktivitas antibakteri ZnO. Hasil analisis kualitatif melalui uji fitokimia serta analisis kuantitatif melalui penentuan kadar total polifenol dan flavonoid menunjukkan bahwa ekstrak kulit pisang raja nangka etanol (96%)-air 2:1 (v/v) memiliki kadar metabolit sekunder yang lebih tinggi dibandingkan ekstrak kulit pisang raja nangka etanol (96%)-air 1:1 (v/v). Partikel ZnO berhasil disintesis menggunakan capping agent alami ekstrak kulit pisang raja nangka. Kadar metabolit sekunder yang berbeda pada masing-masing ekstrak mempengaruhi ukuran, morfologi, dan aktivitas antibakteri ZnO hasil sintesis.

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Structural, optical and photocatalytic properties of ZnO nanoparticles modified with Cu

Cited by 41 publications

References 29 publications

Experimental and ab initio studies on the structural, magnetic, photocatalytic, and antibacterial properties of Cu-doped ZnO nanoparticles

Experimental and ab initio studies on the structural, magnetic, photocatalytic, and antibacterial properties of Cu-doped ZnO nanoparticles

Optimal thickness and annealing temperature for enhancement of structural, optical, and photocatalytic properties of ZnO thin films

Pemanfaatan Limbah Kulit Pisang Raja Nangka sebagai Capping Agent Sintesis Partikel ZnO: Variasi Pelarut Ekstraksi

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