Optimizing hydrophilicity in NiO/Graphene composites via stearic acid treatment for humidity-to-energy applications

Nurul Syafiqah Mohamed Mustakim and Dayana Kamaruzaman and A Shamsul Rahimi A Subki and Mohd Hanapiah Abdullah and Mohd Firdaus Malek and Norfarariyanti Parimon and Mohd Khairul Ahmad and Suriani Abu Bakar and Nagamalai Vasimalai and Mohamad Hafiz Mamat (2024) Optimizing hydrophilicity in NiO/Graphene composites via stearic acid treatment for humidity-to-energy applications. International journal of integrated engineering, 16 (7). pp. 1-14. ISSN 2229-838X

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Abstract

Converting water molecules into energy, this research field has garnered significant attention, yet it is still in its early stages of exploration. The main challenge in humidity-to-energy development is the effectiveness of material in water absorption. This article presents a study on surface modification through stearic acid treatment aimed at optimizing the hydrophilicity of hygroscopic material, thereby improving humidity energy harvesting performance. Here, we successfully synthesized a novel NiO/Graphene on cellulose substrate (NiO/Gr/cellulose) as the hygroscopic material using the sonicated solution immersion method. A humidity-to-energy device was fabricated by utilizing the NiO/Gr/cellulose, yielding an output voltage of 2.26 mV, a current density of 0.18 nA/cm², and a power output of 0.51 pW at 75% relative humidity. This research highlights the potential of NiO/Gr/cellulose with sufficient hydrophilicity as a promising hygroscopic material, offering

Item Type:	Article
Keyword:	Humidity-to-energy, Hydroscopic material, Renewable energy, Stearic
Subjects:	Q Science > QC Physics > QC1-999 Physics > QC170-197 Atomic physics. Constitution and properties of matter T Technology > TJ Mechanical engineering and machinery > TJ1-1570 Mechanical engineering and machinery > TJ807-830 Renewable energy sources
Department:	FACULTY > Faculty of Engineering
Depositing User:	ABDULLAH BIN SABUDIN -
Date Deposited:	11 Jun 2025 15:36
Last Modified:	11 Jun 2025 15:36
URI:	https://eprints.ums.edu.my/id/eprint/44090

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