Antibacterial Activity of Solvothermal Obtained ZnO Nanoparticles with Different Morphology and Photocatalytic Activity against a Dye Mixture: Methylene Blue, Rhodamine B and Methyl Orange

International Journal of Molecular Sciences, Год журнала: 2023, Номер 24(6), С. 5677 - 5677

Опубликована: Март 16, 2023

In this paper, we report the synthesis of ZnO nanoparticles (NPs) by forced solvolysis Zn(CH3COO)2·2H2O in alcohols with a different number -OH groups. We study influence alcohol type (n-butanol, ethylene glycol and glycerin) on size, morphology, properties obtained NPs. The smallest polyhedral NPs (<30 nm) were n-butanol, while measured average 44 nm rounded. Polycrystalline particles 120 glycerin only after water refluxing. addition, here, photocatalytic activity, against dye mixture, three model pollutants: methyl orange (MO), methylene blue (MB), rhodamine B (RhB), closer to real situations where is polluted many chemicals. All samples exhibited good activity degradation efficiency reaching 99.99%. sample maintained high >90%, over five catalytic cycles. Antibacterial tests conducted Gram-negative strains Salmonella enterica serovar Typhimurium, Pseudomonas aeruginosa, Escherichia coli, Gram-positive Enterococcus faecalis, Bacillus subtilis, Staphylococcus aureus, cereus. presented strong inhibition planktonic growth for all tested strains, indicating that they can be used antibacterial applications, such as purification.

Язык: Английский

---

Antibacterial Activity of Zinc Oxide Nanoparticles Loaded with Essential Oils

Pharmaceutics, Год журнала: 2023, Номер 15(10), С. 2470 - 2470

Опубликована: Окт. 15, 2023

One major problem with the overuse of antibiotics is that microorganisms acquire resistance; thus dose must be increased unsustainably. To overcome this problem, researchers from around world are actively investigating new types antimicrobials. Zinc oxide (ZnO) nanoparticles (NPs) have been proven to exhibit strong antimicrobial effects; moreover, Food and Drugs Administration (FDA) considers ZnO as GRAS (generally recognized safe). Many essential oils activity their components do not generate resistance over time. drawbacks high volatility some components, which diminishes action they eliminated. The combination NPs can synergistically produce a stronger effect, volatile compounds retained on nanoparticles' surface, ensuring better-lasting effect. samples were characterized X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning (SEM), Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible (UV-Vis), thermal analysis (TG-DSC) coupled evolved gases using FTIR. NPs, size ~35 nm, exhibited loading between 1.44% 15.62%-the lower values specific for limonene-containing (e.g., orange, grapefruit, bergamot, or limette), while obtained cinnamon, minzol, thyme, citronella, lavender oils-highlighting differences among non-polar terpenes alcohol aldehyde derivatives. antibacterial assay indicated existence synergic dependency percentage loaded oil. Loaded offer immense potential development materials applications, such wound dressings food packaging. These utilized in scenarios where burst delivery desired when prolonged sought.

Язык: Английский

---

Antimicrobial Hydroxyethyl-Cellulose-Based Composite Films with Zinc Oxide and Mesoporous Silica Loaded with Cinnamon Essential Oil

Pharmaceutics, Год журнала: 2024, Номер 16(9), С. 1225 - 1225

Опубликована: Сен. 19, 2024

: Cellulose derivatives are gaining much attention in medical research due to their excellent properties such as biocompatibility, hydrophilicity, non-toxicity, sustainability, and low cost. Unfortunately, cellulose does not exhibit antimicrobial activity. However, like hydroxyethyl represent a proper matrix incorporate agents with beneficial therapeutic effects.

Язык: Английский

---

Health Benefits of Antioxidant Bioactive Compounds in the Fruits and Leaves of Lonicera caerulea L. and Aronia melanocarpa (Michx.) Elliot

Antioxidants, Год журнала: 2023, Номер 12(4), С. 951 - 951

Опубликована: Апрель 18, 2023

Lonicera caerulaea L. and Aronia melanocarpa (Michx.) Elliot fruits are frequently used for their health benefits as they rich in bioactive compounds. They recognized a source of natural valuable phytonutrients, which makes them superfood. caerulea presents antioxidant activity three to five times higher than other berries more commonly consumed, such blackberries or strawberries. In addition, ascorbic acid level is the highest among fruits. The species A. considered one richest known sources antioxidants, surpassing currants, cranberries, blueberries, elderberries, gooseberries, contains amounts sorbitol. non-edible leaves genus became extensively analyzed byproduct waste material due high polyphenol, flavonoid, phenolic content, along with small amount anthocyanins, ingredients nutraceuticals, herbal teas, bio-cosmetics, cosmeceuticals, food by pharmaceutical industry. These plants vitamins, tocopherols, folic acid, carotenoids. However, remain outside mainstream fruit consumption, being well only audience. This review aims shed light on compounds healthy superfoods antioxidant, anti-inflammatory, antitumor, antimicrobial, anti-diabetic effects, hepato-, cardio-, neuro-protective potential. this view, we hope promote cultivation processing, increase commercial availability, also highlight ability these be potential nutraceutical sources, helpful human health.

Язык: Английский

---

Morphological effect of green and chemically synthesized nano-ZnO for evaluation of antimicrobial and photo-catalytic activity

Journal of Molecular Structure, Год журнала: 2025, Номер unknown, С. 141822 - 141822

Опубликована: Фев. 1, 2025

Язык: Английский

---

The Antimicrobial Potency of Mesoporous Silica Nanoparticles Loaded with Melissa officinalis Extract

Pharmaceutics, Год журнала: 2024, Номер 16(4), С. 525 - 525

Опубликована: Апрель 10, 2024

Melissa officinalis is an important medicinal plant that used and studied intensively due to its numerous pharmacological effects. This has active compounds with biomedical potential; some are volatile, while others sensitive heat or oxygen. Therefore, increase stability prolong biological activities, the natural extract can be loaded into various nanostructured systems. In this study, different loading systems were obtained from mesoporous silica, like Mobile Composition of Matter family (MCM) a hexagonal (MCM-41) cubic (MCM-48) pore structure, simple functionalized amino groups (using 3-aminopropyl) such as triethoxysilane (APTES). Thus, four materials characterized morphological structural points view by scanning electron microscopy, BET analysis adsorption–desorption isotherms, Fourier-transform infrared spectroscopy (FTIR) thermogravimetric coupled differential calorimetry. Natural was concentrated analyzed High-Performance Liquid Chromatography identify polyphenolic compounds. The tested against Gram-negative bacteria yeasts both reference strains clinical belonging Gram-positive previously isolated intra-hospital infections. highest antimicrobial efficiency found fungal strains. Good activity also recorded methicillin-resistant S. aureus, inhibiting production virulence factors.

Язык: Английский

---

Antimicrobial Packaging for Plum Tomatoes Based on ZnO Modified Low-Density Polyethylene

International Journal of Molecular Sciences, Год журнала: 2024, Номер 25(11), С. 6073 - 6073

Опубликована: Май 31, 2024

Food safety and quality are major concerns in the food industry. Despite numerous studies, polyethylene remains one of most used materials for packaging due to industry reluctance invest new technologies equipment. Therefore, modifications current easier implement than adopting whole solutions. Antibacterial activity can be induced low-density films only by adding antimicrobial agents. ZnO nanoparticles well known their strong activity, coupled with low toxicity UV shielding capability. These characteristics recommend By incorporating such safe dependable agents matrix, we have obtained composite able inhibit microorganisms' growth that as materials. Here report obtaining highly homogenous up 5% a melt mixing process at 150 °C 10 min. The present good transparency visible domain, permitting consumers visualize food, but barrier properties. exhibit antibiofilm from lowest composition (1%), against both Gram-positive Gram-negative bacterial strains. dispersion into matrix was assessed Fourier transform infrared microscopy scanning electron microscopy. optimal mechanical properties were 3% ZnO. thermal analysis indicates addition has increased stability more 100 °C. UV-Vis spectra indicate transmittance lower 5%, making suitable blocking photo-oxidation processes. proved efficient films, successfully preserving plum (Rome) tomatoes 14 days.

Язык: Английский

---

Polydopamine-modified mesoporous silica materials as a novel adsorbent for superior CO2 adsorption: Experimental and DFT study

Journal of environmental chemical engineering, Год журнала: 2023, Номер 11(5), С. 110451 - 110451

Опубликована: Июль 1, 2023

Язык: Английский

---

Temperature-Driven Structural Evolution during Preparation of MCM−41 Mesoporous Silica

Materials, Год журнала: 2024, Номер 17(8), С. 1711 - 1711

Опубликована: Апрель 9, 2024

This study explores the influence of micelles on evolution MCM−41’s pore structure via 24 h hydrothermal treatments in a range temperatures from 100 °C to 200 °C. MCM−41 was characterized using BET, SAXD, FTIR, TEM, and TG-DSC. The findings demonstrate that with temperature elevation 160 °C, undergo expansion, leading an enhanced lattice constant 4.50 nm 4.96 increase diameter 3.17 3.45 nm, while maintaining structural orderliness channels. Upon cooling, reversible contraction strategic addition water glass contribute reduction size. However, at threshold 180 SAXD (100) peak’s half-peak width surges by approximately 40% relative illustrating progressive disruption hexagonal configuration MCM−41. Coupled elevated silica dissolution higher alkaline solution, total disintegration ordered results drastic specific surface area 307 m2/g. These are beneficial developing transformation mechanisms materials designing mesoporous modulation innovatively.

Язык: Английский

---

Tuning Textural Properties by Changing the Morphology of SBA-15 Mesoporous Materials

Materials, Год журнала: 2024, Номер 17(12), С. 2827 - 2827

Опубликована: Июнь 10, 2024

Changing the morphology is an excellent option for altering textural parameters of SBA-15 materials. This study provides a guide on how properties mesoporous structures behave according to their and contribution thermal stability. The objective this work was synthesize different morphologies (spherical, hexagonal prisms, rice-like grains, rods, fibers) materials evaluate existing changes. were synthesized by varying temperature synthesis gel from 25 °C 55 °C, with stirring at 300 or 500 rpm. results X-ray diffraction, Fourier transform infrared spectroscopy, N2 adsorption desorption, scanning electron microscopy evaluated. Thermal stability tests also conducted in inert atmosphere. successfully synthesized, it observed that they all exhibited characteristics, such as ordering, interplanar distance, parameter, specific surface area, micropore mesopore volumes, external wall thickness. They presented stabilities. rice grain had highest area (908.8 cm2/g) best stability, while rod pore diameter (7.7 nm) microporous volume (0.078 cm3/g).

Язык: Английский

---