Surface Modification of β-MnO2 Nanorods as Nanolubricant DOI
Yasser A. Attia, Gamal El-Ghannam

Nanoscience &amp Nanotechnology-Asia, Journal Year: 2023, Volume and Issue: 13(2)

Published: March 31, 2023

Introduction: Nanolubricants are substances that use nanoparticles as lubricant additives. The proposal for wear reduction has piqued interest in nanolubricants. Particle agglomeration is the main drawback of using nanomaterials lubricating oil additives, and creating novel nanolubricants one most difficult challenges. Objective: Evaluation nano β-MnO2 nanorods nanoadditives enhancing characteristics. Methods: After producing by a modified hydrothermal process, oleic acid was used to modify their surfaces. Next, physical tribological characteristics before after addition were assessed. Results: parameters oil, including flash point, pour thermal stability, antiwear ability, viscosity, all improved varying concentrations surface-modified MnO2 rates 8.19%, 50%, 63.04%, 10.9%, 8.96% at 40ºC 4.18% 100ºC, respectively. findings demonstrate shear strain reduced an anti-wear boundary coating created result deposition produced tribochemical reaction products during friction process. Conclusion: development protective film improves requirements, ushering revolution industry.

Language: Английский

Biosynthesis of magnetic ZnO@Fe2O3 nanocomposites decorated with Ag/AgCl using Hormoz Island’s red soil and Avicennia marina leaf extract DOI Creative Commons

M Falahati Rastgar,

Zahra Ghasemi,

Fayezeh Samari

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 29, 2025

The development of environmentally sustainable and non-toxic visible-light (VL) sensitive nanostructured photocatalysts is a significant focus in nanotechnology, necessitating safe synthesis techniques for these nanocomposites. This study introduces straightforward low-temperature biosynthesis process using leaf extract from the Avicennia marina mangrove (MTLE) red soil Hormoz Island, Iran to produce Ag/AgCl-decorated magnetic ZnO@Fe2O3, plasmonic triple heterojunction nanocomposite (NC). biosynthesized Ag/AgCl/ZnO@Fe2O3 NC (BSNC) exhibited particle size ~ 60 nm, magnetization 8.04 emu.g-1, band gap energy (Eg) 1.3 eV, optimized at an MTLE concentration 0.5 g·100 mL-1. significantly influenced properties products, acting as reducing stabilizing agent. As increased 0.125 mL-1, VL light absorption intensity improved, alongside changes Eg, suggesting optimal enhanced photocatalytic activity. BSNC demonstrated broad peak between 400 600 attributed surface plasmon resonance electron dynamics involving Ag/AgCl ZnO. biosynthetic approach offers eco-friendly alternative producing NCs with improved photo-activity.

Language: Английский

Citations

0
Nano Pt/TiO2 photocatalyst for ultrafast production of sulfamic acid derivatives using 4-nitroacetanilides as nitrogen precursor in continuous flow reactors DOI Creative Commons
Yasser M. A. Mohamed, Yasser A. Attia

Environmental Science and Pollution Research, Journal Year: 2023, Volume and Issue: 30(17), P. 51344 - 51355

Published: Feb. 21, 2023

The design of reactors based on high performance photocatalysts is an important research in catalytic hydrogenation. In this work, modification titanium dioxide nanoparticles (TiO

Language: Английский

Citations

9
Challenges surrounding nanosheets and their application to solar-driven photocatalytic water treatment DOI Creative Commons
Diego T. Pérez-Álvarez, Jacob Brown, Elzahraa A. Elgohary

et al.

Materials Advances, Journal Year: 2022, Volume and Issue: 3(10), P. 4103 - 4131

Published: Jan. 1, 2022

A holistic review detailing the recent advances and challenges of nanosheet-derived photocatalysts for removal pollutants using sunlight.

Language: Английский

Citations

9
Nano Ag/AgBr/g-C3N4 catalyzed the production of hydrogen and reduction of d-glucose to sorbitol under visible light irradiation DOI
Mohamed Taha, Yasser M. A. Mohamed, Shymaa S. Medany

et al.

New Journal of Chemistry, Journal Year: 2022, Volume and Issue: 46(37), P. 17746 - 17754

Published: Jan. 1, 2022

In this study, the polymeric graphitic carbon nitride (g-C 3 N 4 ) was modified by anchoring Ag/AgBr to improve its charge separation efficiency.

Language: Английский

Citations

9
Bioethanol production from potato peels using Saccharomyces cerevisiae treated with ZnO and ZnO/g-C3N4 nanomaterials DOI Open Access
Yasser A. Attia, Essam M. Abdelsalam,

Samr Saeed

et al.

Egyptian Journal of Chemistry, Journal Year: 2022, Volume and Issue: 0(0), P. 0 - 0

Published: June 3, 2022

Bioethanol is a promising biofuel produced from agricultural wastes. The problem that the bioconversion of cellulose to bioethanol takes long time for excellent results. Predominantly, efficient enzymes and active microorganisms (yeast) can enhance enzymatic saccharification fermentation bioprocesses, respectively. addition nutrients electron acceptors in form nanomaterials was found modify bioenvironment biostimulate accomplish target bioprocesses efficiently. objective this investigation increase production wastes using nanomaterials. In study, potato peels (as an example wastes) increased ZnO ZnO/g-C3N4 with concentration 5, 10, 15, 50, 100, 150 mg/L each as well control (without nanomaterials). It hypothesized yeast treatment (nutrients) leads cells increases cell activity. Consequently, it these procedures over shorter Hydraulic Retention Time (HRT), i.e., residence time. biostimulation fungi Saccharomyces cerevisiae generated highest 33.2% compared all other treatments.

Language: Английский

Citations

8
Sub-nm titanium dioxide clusters: efficient photocatalysts for clean SOx conversion under visible light irradiation DOI

Samaa Ahmed,

Yasser M. A. Mohamed,

Shaimaa A. Habib

et al.

Chemical Papers, Journal Year: 2024, Volume and Issue: 78(14), P. 7747 - 7757

Published: Aug. 11, 2024

Language: Английский

Citations

1
Efficient visible-light-driven photocatalytic removal of Acid Blue 92, E. coli, and S. aureus over Ag-AgCl nanoparticles-decorated bismuth sulfide microparticles DOI Creative Commons
Elmuez A. Dawi,

Mohsen Padervand,

Alireza Bargahi

et al.

Materials Research Express, Journal Year: 2023, Volume and Issue: 10(10), P. 105008 - 105008

Published: Oct. 1, 2023

Abstract Bismuth sulfide particles were modified with Ag-AgCl nanoparticles to make a visible light active plasmonic photocatalyst. The powder x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive (EDX), elemental mapping, nitrogen adsorption–desorption isotherms (BET-BJH), photoluminescence (PL), and diffuse reflectance (DRS) techniques served analyze the morphological structural properties. To evaluate photocatalytic performance, Acid Blue 92 (AB92) azo dye was degraded in aqueous solution under irradiation. According results, 0.025 g of photocatalyst able remove more than 98% AB92 at 15 ppm concentration neutral acidity, following pseudo first-order kinetics. Superoxide anion radicals (O 2 •− ) also recognized as most key species promoting photodegradation pathway. Also, antibacterial activity materials explored against E. coli S. aureus pathogenic bacteria irradiation dark conditions. Using transmission (TEM) images treated cells, it found that damaged cell wall structure both gram-positive negative within h significantly, which could be attributed efficient production destructive superoxide on surface Ag-AgCl/Bi S 3 illumination.

Language: Английский

Citations

3
Surface Modification of β-MnO2 Nanorods as Nanolubricant DOI
Yasser A. Attia, Gamal El-Ghannam

Nanoscience &amp Nanotechnology-Asia, Journal Year: 2023, Volume and Issue: 13(2)

Published: March 31, 2023

Introduction: Nanolubricants are substances that use nanoparticles as lubricant additives. The proposal for wear reduction has piqued interest in nanolubricants. Particle agglomeration is the main drawback of using nanomaterials lubricating oil additives, and creating novel nanolubricants one most difficult challenges. Objective: Evaluation nano β-MnO2 nanorods nanoadditives enhancing characteristics. Methods: After producing by a modified hydrothermal process, oleic acid was used to modify their surfaces. Next, physical tribological characteristics before after addition were assessed. Results: parameters oil, including flash point, pour thermal stability, antiwear ability, viscosity, all improved varying concentrations surface-modified MnO2 rates 8.19%, 50%, 63.04%, 10.9%, 8.96% at 40ºC 4.18% 100ºC, respectively. findings demonstrate shear strain reduced an anti-wear boundary coating created result deposition produced tribochemical reaction products during friction process. Conclusion: development protective film improves requirements, ushering revolution industry.

Language: Английский

Citations

0