CuO nanoparticles decorated on hydroxyapatite/ferrite magnetic support: photocatalysis, cytotoxicity, and antimicrobial response

Paris, E. C.; Malafatti, João Otávio Donizette; Moreira, Ailton José; Santos, Lílian Cruz; Sciena, C. R.; Zenatti, Alessandra; Escote, M. T.; Mastelaro, Valmor Roberto; Joya, M. R.

doi:10.1007/s11356-021-18263-y

Cited by 18 publications

(7 citation statements)

References 69 publications

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“…In this sense, materials on the nanometer scale have a high potential due to their smaller size and larger surface area, characteristics that facilitate energy transfer with the polymer 5,6 . Among the ceramic materials, highlight mineral clays such as montmorillonite, zeolites, silica, graphene, and oxides (CuO, ZnO, TiO 2 ) 7–12 . In addition to increasing the intrinsic properties of the polymer and more outstanding durability, these materials can favor the appearance or intensify properties such as ultraviolet–visible radiation barrier, antimicrobial, and electrical or magnetic conductivity 13–15 .…”

Section: Introductionmentioning

confidence: 99%

“…5,6 Among the ceramic materials, highlight mineral clays such as montmorillonite, zeolites, silica, graphene, and oxides (CuO, ZnO, TiO 2 ). [7][8][9][10][11][12] In addition to increasing the intrinsic properties of the polymer and more outstanding durability, these materials can favor the appearance or intensify properties such as ultraviolet-visible radiation barrier, antimicrobial, and electrical or magnetic conductivity. [13][14][15] On the other hand, starch-based materials are pretty susceptible to bacteria and fungi growth due to the high energy source available (glucose), which causes a decrease in the viability of packaging materials due to the contamination susceptibility and the shorter shelf life.…”

Section: Introductionmentioning

confidence: 99%

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Antifungal and ultraviolet–visible barrier properties in starch films reinforced with CuO nanoparticles

Malafatti

Domingues

Meirelles

et al. 2023

J of Applied Polymer Sci

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Starch materials are subject to loss of initial characteristics due to the retrogradation degenerative effect, high hygroscopicity, and favoring the growth of the microorganisms, which reduces the shelf life of packaging. In this sense, the insertion of nanoparticulated CuO was evaluated for the best performance.CuO is a semiconductor that can improve optical, mechanical, and antimicrobial properties, enabling excellent promotion of starch films. The hot injection precipitation method was used to obtain CuO nanoparticles in the nanometric scale rapidly. The films were carried out from the starch homogenization in water and urea under temperature, followed by thermopressing at 120 C. As a result, the 1% CuO (w w À1 ) increased tensile strength from 0.87 ± 0.40 to 1.92 ± 0.09 MPa. Furthermore, the films containing nanoparticles showed a barrier property against radiation in the ultraviolet-visible spectrum, not observed for the micrometric scale. Such results were attributed to the superior opacity of the films generated by nanometric reinforcement. Concerning antimicrobial activity, the films containing CuO showed a fungistatic effect (33%) for the Alternaria alternata fungus, a microorganism very susceptible to carbohydrate-rich sources. Thus, the CuO-reinforced starch films improved physicochemical and biological properties, making them promissory candidates for commercial application.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Antifungal and ultraviolet–visible barrier properties in starch films reinforced with CuO nanoparticles

Malafatti

Domingues

Meirelles

et al. 2023

J of Applied Polymer Sci

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“…The use of supports in heterogeneous adsorption methods promotes an adsorbent-accessible recovery and simple separation from the aqueous medium [ 38 , 39 , 40 , 41 ]. Additionally, nanocomposites combine individual characteristics to increase desirable properties [ 42 , 43 , 44 , 45 ].…”

Section: Introductionmentioning

confidence: 99%

Modified Silica Nanoparticles from Rice Husk Supported on Polylactic Acid as Adsorptive Membranes for Dye Removal

et al. 2023

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Industrial effluents and wastewater treatment have been a mainstay of environmental preservation and remediation for the last decade. Silica nanoparticles (SiO2) obtained from rice husk (RH) are an alternative to producing low-cost adsorbent and agriculture waste recovery. One adsorption challenge is facilitating the adsorbate separation and reuse cycle from aqueous medium. Thus, the present work employs SiO2 supported on polylactic acid (PLA) nanofibers obtained by the electrospinning method for Rhodamine B (RhB) dye adsorption. The silica surface was modified with trimethylsilyl chloride (TMCS) to increase affinity towards organic compounds. As a result, the silanized surface of the silica from rice husk (RHSil) promoted an increase in dye adsorption attributed to the hydrophobic properties. The PLA fibers containing 40% SiO2 (w w−1) showed about 85–95% capacity adsorption. The pseudo-first-order kinetic model was demonstrated to be the best model for PLA:SiO2 RHSil nanocomposites, exhibiting a 1.2956 mg g−1 adsorption capacity and 0.01404 min−1 kinetic constant (k1) value. In the reuse assay, PLA:SiO2 membranes preserved their adsorption activity after three consecutive adsorption cycles, with a value superior to 60%. Therefore, PLA:SiO2 nanocomposites from agricultural waste are an alternative to “low-cost/low-end” treatments and can be used in traditional treatment systems to improve dye removal from contaminated waters.

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“…Metal oxide semiconductors have become promising candidates for photocatalytic applications due to their light absorption properties, charge-transfer characteristics, excited-state lifetime, and electronic structures . Among these oxides, CuO with a proper low bandgap (1.2–2.1 eV) and ease of synthesis has been proven to be an excellent candidate as efficient photocathodes for PEC water splitting , or as photocatalysts for water remediation. , …”

Section: Introductionmentioning

confidence: 99%

“…3 Among these oxides, CuO with a proper low bandgap (1.2−2.1 eV) 4 and ease of synthesis has been proven to be an excellent candidate as efficient photocathodes for PEC water splitting 5,6 or as photocatalysts for water remediation. 7,8 Various CuO structures have been feasibly synthesized by various chemical and physical methods such as hydrothermal growth, 9 chemical precipitation, 10 electrochemical routes, 11,12 thermal oxidation, 13,14 sol−gel method, 15,16 microwave irradiation, 17 magnetron sputtering, 18 and other methods such as plasma-based processes. 19,20 However, these methods have certain limitations, such as the generation of liquid waste, the need for conductive glass (for PEC applications), high energy consumption, or significant time consumption.…”

Section: Introductionmentioning

confidence: 99%

Preparation of CuO Nanoparticles Film on Cu Substrate by Air Cold Plasma and Its Photoelectrochemical Properties

Zhang

Hou

2022

ACS Appl. Energy Mater.

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CuO nanostructures are optoelectronic materials that are responsive to a wide range of visible light, and they are widely used as photoelectrodes for sunlight-based photoelectrochemical (PEC) applications. We herein introduce a green, efficient plasma-based method for preparing a CuO nanoparticle film with excellent performance in PEC water splitting. The cold plasma was generated on copper foil by dielectric barrier discharge in ambient air. Through the 30 s discharge, an aqueous film was formed on the Cu surface, which had acted as the medium facilitating the reactions between the Cu and the active species from the plasma. The aqueous film was then crystallized into a Cu4(NO3)2(OH)6 nanosheet layer during drying. Finally, a CuO film with a thickness of 360 nm composed of CuO nanoparticles with sizes of 50–100 nm was obtained by calcining the Cu4(NO3)2(OH)6 at 270 °C. Under AM 1.5 G 100 mW cm–2 illumination, the CuO film exhibited a high photocurrent density of −1.2 mA cm–2 at 0.35 V (vs RHE), comparable with the CuO nanostructures on Cu substrate by other methods. The prolonged discharge (240 s) resulted in a thicker film (950 nm), which showed a lower photocurrent density because of the increased charge-transfer resistance. This method for CuO nanoparticles does not need any chemicals and possesses the advantages of low cost and high efficiency. Furthermore, using flexible and conductive Cu as the substrate makes it a competitive technique for fabricating CuO-based photoelectrodes. By adopting a suitable photocorrosion-protection scheme, the CuO film can hopefully be used for PEC hydrogen generation and other photocatalytic applications.

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CuO nanoparticles decorated on hydroxyapatite/ferrite magnetic support: photocatalysis, cytotoxicity, and antimicrobial response

Cited by 18 publications

References 69 publications

Antifungal and ultraviolet–visible barrier properties in starch films reinforced with CuO nanoparticles

Antifungal and ultraviolet–visible barrier properties in starch films reinforced with CuO nanoparticles

Modified Silica Nanoparticles from Rice Husk Supported on Polylactic Acid as Adsorptive Membranes for Dye Removal

Preparation of CuO Nanoparticles Film on Cu Substrate by Air Cold Plasma and Its Photoelectrochemical Properties

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