Review Article
Review on Synthesis, Physical Properties and Applications of Bismuth Sulfide Nanoparticles for Insight into Its Prominent Multifunction
Issue:
Volume 2, Issue 4, December 2025
Pages:
46-53
Received:
11 November 2025
Accepted:
20 November 2025
Published:
11 December 2025
Abstract: Bismuth sulfide is valued for its unique physical properties like electrical conductivity, high carrier mobility and concentration, suitable band gap, high X-ray attenuation coefficient, high absorption coefficient and so on, making it suitable for applications in electronics, catalysis, environmental remediation, energy storage, sensors, and biomedical fields. For instance, its semiconducting qualities and high surface area make it effective for processes like adsorption and photocatalysis and suitable band gap, stability, and visible light absorption capabilities, Bi2S3 shows promise for hydrogen generation through photocatalytic water splitting. Furthermore, Bi2S3 can be prepared utilizing controlled temperatures, precursors, and solvents via various synthesis methods, including the sol-gel method, chemical methods and chemical deposition methods. From these techniques, sol-gel method is the most common due to its cost effectiveness and ability to create high-quality materials at low temperatures. Having these as initiative concept, this review offers further studies to improve synthesis processes, optimize characteristics and explore new applications. Therefore, this work suggested that further investigation on Bismuth sulfide is needed to improve its properties for specific uses through doping as well as utilizing different synthesis techniques.
Abstract: Bismuth sulfide is valued for its unique physical properties like electrical conductivity, high carrier mobility and concentration, suitable band gap, high X-ray attenuation coefficient, high absorption coefficient and so on, making it suitable for applications in electronics, catalysis, environmental remediation, energy storage, sensors, and biome...
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Research Article
Development and Validation of an Experimental Method for the Thermophysical Characterization of Thermal Conductivity in Porous Building Materials: Application to Stone in the Context of Sustainable Construction
Mohamed Filali*
,
Fatima Filali,
Hasna Yassine
Issue:
Volume 2, Issue 4, December 2025
Pages:
54-61
Received:
27 June 2025
Accepted:
21 July 2025
Published:
30 December 2025
DOI:
10.11648/j.wjmst.20250204.12
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Abstract: The thermophysical characterization of construction materials is a fundamental area of research in building physics and energy efficiency. Over the years, various experimental techniques have been developed to determine key thermal properties such as thermal conductivity, diffusivity, and heat capacity. While these methods have provided valuable results, their accuracy and applicability remain limited in many cases due to uncertainties in the input parameters and assumptions regarding material homogeneity and saturation levels. These limitations often require researchers to implement additional experimental protocols to refine the measurements and adapt them to real-world conditions. This paper proposes a new experimental method that builds on two well-established techniques: the "hot wire" method and the "guarded hot probe" method. The proposed technique is specifically designed for the characterization of unsaturated porous construction materials, which pose particular challenges due to their complex structure and moisture content. It enables the reliable measurement of apparent thermal conductivity under variable saturation conditions and offers greater adaptability in laboratory and field settings. Experimental thermal tests were performed on a typical construction material to validate the method. The results show that the new technique improves the precision of thermophysical parameter estimation and provides a more accurate reflection of material behaviour under realistic conditions. This approach contributes to the on-going development of energy-efficient construction practices by supporting the selection and optimization of materials based on scientifically validated thermal performance criteria.
Abstract: The thermophysical characterization of construction materials is a fundamental area of research in building physics and energy efficiency. Over the years, various experimental techniques have been developed to determine key thermal properties such as thermal conductivity, diffusivity, and heat capacity. While these methods have provided valuable re...
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