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Nanotechnoly and materials science

Interfacial energy transfer and charge separation in rGO/Y2O3/ZnO: Er,Yb plasmonic hybrid nanostructures for photovoltaic enhancement

Abstract This study presents a multifunctional hybrid system constructed by interfacing thermally reduced graphene oxide (rGO) nanoflakes with rare-earth-doped Y2O3/ZnO: Er,Yb thin films designed to achieve near-field optical modulation and enhanced charge transport. Here, the rGO layers were deposited by drop-casting exfoliated graphene oxide in isopropyl alcohol. The layers were then thermally annealed at 1000 […]

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Fuel cell

Dual proton transport in Schiff base-modified chitosan functionalized with AMPS for fuel cell applications

Abstract Proton exchange membranes (PEMs) require high proton conductivity, stability, and durability for fuel cell applications. This study reports the synthesis of N-(2-acrylamido-2-methylpropane sulfonyl) chitosan (CSB) via Schiff base functionalization with 2-acrylamido-2-methylpropane sulfonic acid (AMPS) and the introduction of imine (–CH=N–) and sulfonic acid (–SO3H) groups, which significantly enhance dual proton conduction mechanisms through the […]

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Food science

Comparative Effects of Various Plasticizers on the Physicochemical Characteristics of Polyhydroxybutyrate (PHB) Film for Food Packaging

Abstract This work examined the effects of four plasticizers, glycerol (GLY), potassium phosphate (PHOS), polyethylene glycol (PEG), and soy lecithin (SL), on the structural, surface, thermal, optical, and mechanical properties of polyhydroxybutyrate (PHB) films. FTIR spectra demonstrated that these plasticizers maintained the PHB molecular structure, while X-ray diffraction data proved that PHB crystallinity decreased upon […]

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Clean Energy and Renewable Tech

Functionalized clay nanocomposites for enhanced proton conductivity in polyether-based fuel cell membranes

Abstract This review critically examines the recent progress in the development of sulfonated polyether sulfone (SPES) and its derivatives (including sulfonated polyether sulfone with open sulfonic acid groups (SPESOS)) as functional matrices for next-generation proton exchange membrane (PEM) fuel cells. SPES-based membranes offer a tunable backbone, excellent thermal and mechanical stability, and chemical resistance, yet […]

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Clean Energy and Renewable Tech

Enhanced lithium-ion transport in oxidized polyvinyl alcohol/La0·56Li0·33TiO3 hybrid electrolytes for solid-state batteries

Abstract This study explores the electrical and dielectric properties of hybrid solid electrolytes made from hydrothermally synthesized La0·56Li0·33TiO3 (LLTO) oxide and oxidized polyvinyl alcohol (OPVA). The influence of LLTO on ionic conductivity and dielectric behavior was assessed by incorporating it into the OPVA matrix at weight ratios of 5, 10, 20, and 30%. Read More

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Clean Energy and Renewable Tech

High-performance OPVA/CMC hybrid biopolymer electrolyte withenhanced proton conductivity for SBPE applications

High-performance OPVA_CMC hybrid biopolymer electrolyte with enhanced proton conductivity for SBPE applications

Abstract A novel solid biopolymer electrolyte (SBPE) hybrid was developed by directly linking oxidized polyvinyl alcohol (OPVA) with carboxymethyl cellulose (CMC) via ester formation. The CMC used in this study had a degree of substitution (DS) of 1.12, while OPVA exhibited partial oxidation with a carbonyl content of 60%. Read More

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Nanotechnoly and materials science

Enhanced CuO Thin Film Growth via an Optimized Aerosol Droplet Method: Thermal Effects and Structural Evaluation

Enhanced-CuO-Thin-Film-Growth-via-an-Optimized-Aerosol-Droplet-Method-Thermal-Effects-and-Structural-Evaluation

Abstract The scalable production of high-quality copper oxide (CuO) thin films remains challenging for semiconductor and gas sensor applications. This study presents an optimized aerosol droplet method (AMD) that enhances film uniformity and crystallinity through improved substrate positioning and aerosol dynamics. External Source …. Read More

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Nanotechnoly and materials science

In-situ synthesis of ZnO nanoparticles in oxidized polyvinyl alcohol nanocomposites for tunable optoelectronic and proton conductive performance

synthesis of ZnO nanoparticles

ABSTRACT: This work presents the in-situ synthesis of zinc oxide (ZnO) nanoparticles in an oxidized polyvinyl alcohol (OPVA) matrix, which greatly enhances the final nanocomposites optical, mechanical, and proton conductive properties. Zinc acetate was used as a precursor to synthesis ZnO nanoparticles at different concentrations (1 wt %, 5 wt%, and 10 wt%) within the […]

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Clean Energy and Renewable Tech

Proton conductivity amelioration of chitosan via novel Schiff base formation with oxidized polyvinyl alcohol for proton exchange membrane

proton exchange membrane

Qana A. Alsulami1 · Wafa A. Bawazir1 · Sherif M. A. S. Keshk2 Received: 14 December 2024 / Accepted: 25 February 2025 © Qatar University and Springer Nature Switzerland AG 2025 Abstract Chitosan (CS) is a naturally occurring biopolymer that is readily accessible and widely used in various industrial applications. However, its low proton conductivity, particularly at elevated temperatures, poses […]

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Clean Energy and Renewable Tech

Enhanced proton conductivity of sulfonated poly(ether ether ketone) incorporating oxidized polyvinyl alcohol for high‑performance proton exchange membranes

high‑performance proton exchange membranes

Mohamed A. Ben Ali1 · Mohamed A. Ben Moussa2 · Souhib Umer Ilyas1 · Rizwan Nasir1 · Dorra Ghorbel3,4 · Sherif M. A. S. Keshk5 Received: 28 October 2024 / Accepted: 18 March 2025 © The Author(s) 2025 Abstract Alternative proton exchange membranes (PEMs) with high proton conductivity must be fabricated at reasonable costs to qualify as commercially used proton-exchange membrane fuel cells (PEMFCs). Read more

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