Antibiotic copper oxide-curcumin nanomaterials for antibacterial applications

Varaprasad, Kokkarachedu; López, Matias; Núñez, Dariela; Jayaramudu, Tippabattini; Sadiku, Emmanuel Rotimi; Karthikeyan, Chandrasekaran; Oyarzúnc, Patricio

doi:10.1016/j.molliq.2019.112353

Cited by 64 publications

(19 citation statements)

References 48 publications

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“…Among such nanoparticles, copper oxide nanoparticles (CuONPs) possess a narrow bandgap and have been utilized for biomedical applications such as infection control [ 28 ]. They owe their use in these applications to the ability to inhibit the growth of fungi, bacteria and viruses [ 29 , 30 ]. Furthermore, it was reported that SARS-CoV-2 has a lower stability on the surface of metallic copper compared to that on other materials, such as plastic or stainless steel [ 31 ].…”

mentioning

confidence: 99%

Protecting healthcare workers during COVID-19 pandemic with nanotechnology: A protocol for a new device from Egypt

Ahmed

Afifi

Uskoković³

2020

Journal of Infection and Public Health

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The outbreak of the coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is thought to have occurred first in Wuhan, China in December 2019, before spreading to over 120 countries in the months that followed. It was declared a “public health emergency of international concern” by the World Health Organization on January 31, 2020 and recognized as a pandemic on March 11, 2020. The primary route of SARS-CoV-2 transmission from human to human is through inhalation of respiratory droplets. Devising protective technologies for stopping the spread of the droplets of aerosol containing the viral particles is a vital requirement to curb the ongoing outbreak. However, the current generations of protective respirator masks in use are noted for their imperfect design and there is a need to develop their more advanced analogues, with higher blockage efficiency and the ability to deactivate the trapped bacteria and viruses. It is likely that one such design will be inspired by nanotechnologies. Here we describe a new design from Egypt, utilizing a reusable, recyclable, customizable, antimicrobial and antiviral respirator facial mask feasible for mass production. The novel design is based on the filtration system composed of a nanofibrous matrix of polylactic acid and cellulose acetate containing copper oxide nanoparticles and graphene oxide nanosheets and produced using the electrospinning technique. Simultaneously, the flat pattern fabricated from a thermoplastic composite material is used to provide a solid fit with the facial anatomy. This design illustrates an effort made in a developing setting to provide innovative solutions for combating the SARS-CoV-2 pandemic of potentially global significance.

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mentioning

confidence: 99%

Protecting healthcare workers during COVID-19 pandemic with nanotechnology: A protocol for a new device from Egypt

Ahmed

Afifi

Uskoković³

2020

Journal of Infection and Public Health

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“…The last 1.01% weight loss occurred at 550°C–800°C, corresponding the degradation of structural OH 2 and hydroxyl groups. The decomposition of Cur began at about 190 °C, ascribing to the dehydroxylation of Cur molecules ( Figure 6B ) ( Varaprasad et al, 2020 ). The total mass loss of pure Cur below 500°C reached 43.59%.…”

Section: Resultsmentioning

confidence: 99%

Incorporation of Different Metal Ion for Tuning Color and Enhancing Antioxidant Activity of Curcumin/Palygorskite Hybrid Materials

Yan

et al. 2021

Front. Chem.

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Curcumin is one of the dietary dyes extracted from turmeric and used for prevention and treatment of various illnesses. However, the low bioavailability and poor stability of curcumin limits its relevant applications. Therefore, different metal ions including Cu2+, Zn2+, Mg2+, Al3+, or Fe3+ were incorporated to tune the color, enhance the environmental stability and antioxidant activity of curcumin in the presence of palygorskite in this study. The as-prepared samples were studied using X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, Zeta potential, and transmission electron microscopy. In addition, the density functional theory calculation was also performed to explore the possible interaction among metal ions, curcumin and palygorskite. It was found that the color changing and stability enhancing were ascribed to the curcumin-metal ions coordination as well as chemical interactions between curcumin-metal complex and palygorskite. Moreover, the as-prepared composites showed more excellent color, thermal stability, antioxidant activity, and fluorescence properties than that of the curcumin/palygorskite composites due to the presence of metal ions. The finding of this investigation may contribute to developing the multifunctional composites with different colors and good antioxidant activity for relevant applications based on curcumin and palygorskite.

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“…Curcumin deposited on TiO2 surface [8] or ZnO [9] tested for photosensitizers has been reported to widen the photon energy absorption range towards visible light compared to the metal oxides, which are photosensitive under UV light. Bandgap energy of curcumin-only was observed at about 2.30 eV [9,10], while the electronic transition absorption of the molecule in solution is in the range of 300 -600 nm, where the maximum wavelength is solvent dependent [5,11]. The mixture of curcumin with copper oxide shows lower bandgap energy than curcumin-only from 2.30 eV (curcumin) to 2.27-2.16 eV getting smaller with increasing CuO concentration [10].…”

Section: Figure 1 Keto-enol Tautomerism Of Curcuminmentioning

confidence: 91%

Bandgap Energy of TiO2/M-Curcumin Material (M = Na+, Mg2+, Cu2+)

et al. 2022

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Bandgap energy (Egap) of TiO2/curcumin as well as TiO2/M-curcumin (M = Na+, Mg2+, Cu2+) was determined. The material was prepared on transparent conductive oxide as TiO2 film. Then, the curcumin and curcumin derivatives were adsorbed on TiO2 surface by immersing the film in solution of the compounds. The diffuse reflectance UV-Vis spectra of the materials were recorded and utilized to calculate the Egap using the Tauc plot method. The calculation gave the Egap of TiO2 of 3.27 eV that lowers after being deposited with curcumin and metal-curcumin compounds. The Egap of TiO2/curcumin was 2.82 eV, while TiO2/Na+-curcumin, TiO2/Mg2+-curcumin, and TiO2/Cu2+-curcumin were 2.36, 3.11, and 2.15 eV, respectively. Curcumin metal complexes, i.e., TiO2/Cu2+-curcumin, showed high molar absorptivity and effectively deposited on the TiO2 lowers the bandgap energy of TiO2 compared to free-curcumin on TiO2.

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Antibiotic copper oxide-curcumin nanomaterials for antibacterial applications

Cited by 64 publications

References 48 publications

Protecting healthcare workers during COVID-19 pandemic with nanotechnology: A protocol for a new device from Egypt

Protecting healthcare workers during COVID-19 pandemic with nanotechnology: A protocol for a new device from Egypt

Incorporation of Different Metal Ion for Tuning Color and Enhancing Antioxidant Activity of Curcumin/Palygorskite Hybrid Materials

Bandgap Energy of TiO2/M-Curcumin Material (M = Na+, Mg2+, Cu2+)

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