Journal of the Australian Ceramic Society最新文献

{"title":"Mechanistic insights into toxicity of CuO star shaped nanoasters on microbial and cellular systems","authors":"Touseef Amna,&nbsp;M. Shamshi Hassan,&nbsp;Alya Aljuaid,&nbsp;Faheem A. Sheikh,&nbsp;Abdullah A. A. Alghamdi,&nbsp;Asiya Nazir,&nbsp;Myung-Seob Khil","doi":"10.1007/s41779-025-01311-y","DOIUrl":"10.1007/s41779-025-01311-y","url":null,"abstract":"<div><p>Even though some information exists about cytotoxicity of copper oxide on human cell lines, nothing is known about their cytotoxic action on muscle precursor myoblasts. The aim of this study was to investigate cytotoxic impact of copper oxide star shaped nanoaster flowers on both prokaryotic and eukaryotic systems. Successful synthesis of nanoasters was carried out by hydrothermal approach and were characterized by XRD, SEM-EDX and FTIR. <i>Escherichia coli</i> (Gram-ve), <i>S. aureus</i> (Gram + ve) and <i>Candida albicans</i> were used to measure cytotoxicity to bacterial and fungal cells respectively. Myoblasts were treated with various doses of nanoasters to investigate in vitro cytotoxicity. Cell survival was assessed using cell counting kit-8 assay at regular intervals. Nanoasters amalgamated via hydrothermal consist of nanorod clusters, with diameters ranging from 10 to 40 nm, exhibited potent bactericidal and antimycotic activity. For the first time, star shaped nanoasters have been investigated for their biological function in vitro, and results indicated that they bind genomic DNA, block mitochondrial caspases 3 and 7, and reduce cell viability in concentration dependent mode. Nanoasters were effective both on prokaryotic and eukaryotic systems. In summary, figuring out pathways will aid in comprehending consequences of nanoasters and assessing associated risks these flowers pose to human health. Nevertheless, in future, employing these nanoasters with appropriate capping could offer potential benefits in addressing carcinogenic and toxicological conditions associated with oxidative stress.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 3","pages":"1183 - 1194"},"PeriodicalIF":2.6,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148365935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of hot pressing sintering temperature on microstructure and properties of Si3N4-SiC composite ceramics","authors":"Xiangrong Zang,&nbsp;Zhiqiang Yu,&nbsp;Haiqing Li,&nbsp;Huihui Tan,&nbsp;Yanping Lu,&nbsp;Ming Yan,&nbsp;Zihan Peng","doi":"10.1007/s41779-025-01307-8","DOIUrl":"10.1007/s41779-025-01307-8","url":null,"abstract":"<div><p>Si₃N₄-SiC composite ceramics with Y₂O₃-MgO-Al₂O₃ as multi-component sintering additives were prepared by hot pressing sintering. The effect of sintering temperature on the properties of Si₃N₄-SiC composites was studied. With the increase of hot pressing sintering temperature, the microstructure of the Si₃N₄-SiC composites was improved. However, with the further increase of hot pressing sintering temperature, the porosity of Si₃N₄-SiC composites increased. When the sintering temperature is 1720 °C, the comprehensive properties of Si₃N₄-SiC composite ceramics were better. The density and thermal conductivity of obtained Si₃N₄-SiC composite ceramics at room temperature was 3.232 g/cm³ and 62.107 W/(m•K) respectively. The dielectric constant of Si₃N₄-SiC composites for 1720 °C sintering temperature reached a minimum range of 14–19 and the dielectric loss was the range of 0.5–0.7 in W band (75–110 GHz). Meanwhile, the microwave absorbing performance of Si₃N₄-SiC composite ceramics attenuator at Y band (170–260 GHz) were investigated by measuring S parameters. Si₃N₄-SiC composite ceramics attenuator sintered at 1720 °C showed good microwave absorbing performance at Y band, with S11&lt;-20 dB and S21&lt;-75 dB.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 3","pages":"1149 - 1155"},"PeriodicalIF":2.6,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148365882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of pure α-Al2O3 powder sources and sintering temperature on the behaviour of Al2O3 ceramics in Terahertz band","authors":"Kagan Murat Purlu,&nbsp;Sekip Dalgac,&nbsp;Elif Isik,&nbsp;Betul Kafkaslioglu Yildiz,&nbsp;Kholoud Elmabruk","doi":"10.1007/s41779-025-01312-x","DOIUrl":"10.1007/s41779-025-01312-x","url":null,"abstract":"<div><p>This study explores the impact of different sources of pure α-Al₂O₃ powder and sintering temperatures on the microstructure, densification, and dielectric properties of Al₂O₃ ceramics within the terahertz (THz) frequency range. In this regard, two commercially available α-Al₂O₃ powders, Almatis and Alfa Aesar, are sintered at temperatures of 1500 °C, 1550 °C, and 1600 °C. The microstructural analysis indicates that samples derived from Almatis have finer grain sizes of 1.6 ± 0.1 μm at 1500 °C due to the presence of sintering aids that inhibit the grain growth. In contrast, Alfa Aesar samples exhibit larger grains up to 3.8 ± 0.4 μm at 1600 °C. As the sintering temperature increases, the relative density improves, reaching a peak of 97.6 ± 2.1% for Almatis samples sintered at 1600 °C. The examination of dielectric properties presents that Almatis powder used ceramics consistently have lower absorption coefficients and loss tangents when compared to the Alfa Aesar samples. This difference is attributed to reduced porosity and optimized grain morphology in the Almatis ceramics. On the other hand, Alfa Aesar samples demonstrate higher permittivity, up to 10.11 at 1550 °C, but experience increased dielectric losses. The variations in sintering temperatures significantly impact the dielectric stability, with Almatis samples showing minimal fluctuations in the refractive index. The obtained results highlight the essential role of powder source selection and sintering conditions in optimizing Al₂O₃ ceramics for high-performance THz applications, especially for next-generation 6G communication systems requiring low-loss substrates.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 3","pages":"1195 - 1203"},"PeriodicalIF":2.6,"publicationDate":"2025-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148365946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction of a novel NiO-bentonite composite for enhanced tetracycline degradation under visible light irradiation","authors":"Levent Oncel","doi":"10.1007/s41779-025-01306-9","DOIUrl":"10.1007/s41779-025-01306-9","url":null,"abstract":"<div><p>In this study, a novel ceramic composite based on NiO and bentonite (NiO/BEN) was successfully synthesized via the hydrothermal method for the effective photocatalytic degradation of tetracycline (TC) in aqueous solutions. The synthesized composites were characterized using XRD, SEM/EDS, UV–Vis DRS, PL, XPS, BET, and FTIR techniques. The analyses revealed that NiO and bentonite formed a well-integrated heterostructure, and NiO/BEN had absorption in both the UV and visible light regions, with stronger absorption in the UV region. BET analysis confirmed a mesoporous structure with a specific surface area of 9.66 m²/g, considerably higher than those typically reported for pristine NiO, indicating improved accessibility of active sites. FTIR spectra exhibited characteristic peaks at 1042.8, 1012.9, 790.05, and 466.33 cm⁻¹, confirming the coexistence of NiO and bentonite phases with preserved structural integrity. The composite had a band gap of 4.05 eV, which effectively promoted electron-hole pair generation, while the shallow and deep defects in the structure facilitated efficient charge separation. In photocatalytic degradation experiments, NiO-bentonite composite showed much better performance compared to pristine NiO (19.51%), while increasing the NiO: bentonite ratio from 1:0.2 (52.41%) to 1:0.5 (85.58%) significantly enhanced the tetracycline removal efficiency after 120 min of visible‑light irradiation at neutral pH. The composite also exhibited strong photocatalytic activity across different water matrices, achieving 85.58% removal in distilled water and maintaining appreciable efficiencies of 69.52% in tap water and 70.67% in drinking water, where competing ions and dissolved organics are present. Reusability tests showed a gradual decline in efficiency from 85.58% in the first cycle to 69.09%, 50.65%, 39.34%, and 24.34% over five consecutive cycles, likely due to the accumulation of non-degradable by-products on active sites. The degradation reaction was found to be driven primarily by photogenerated holes, with superoxide radicals also playing an important role. Under sole visible-light irradiation and without added oxidants, the NiO–bentonite composite removed 85.58% of tetracycline at neutral pH, 93.61% at pH 3, and 78.47% at pH 10—each value representing a more than fourfold improvement over pristine NiO (19.51%) and surpassing all NiO/clay systems reported to date—thereby offering an energy-efficient, environmentally friendly, and readily scalable photocatalyst for next-generation water-treatment technologies targeting antibiotic contamination.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 1","pages":"441 - 454"},"PeriodicalIF":2.1,"publicationDate":"2025-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mineral transformation in seashells through thermal treatment: structural and adsorption characteristics","authors":"Lia Anggresani,&nbsp;Ayu Rahayu Anggraeni,&nbsp;Andi Rachman,&nbsp;Aster Rahayu,&nbsp;Tsugufumi Matsuyama,&nbsp;Lee Wah Lim","doi":"10.1007/s41779-025-01296-8","DOIUrl":"10.1007/s41779-025-01296-8","url":null,"abstract":"<div><p>Seashells are one of the natural and renewable sources of calcium carbonate. Crystals of calcium carbonate in seashells can be in the form of calcite or aragonite, which can transform along with the thermal treatment. This study explores the effect of thermal treatment on changes in the structure, morphology, crystalline form, and surface area of various seashells along with their implications for various industrial applications. Several types of seashells were powdered and then calcined at a temperature of 900℃ for 5 h. Characterization was performed systematically on all shell powders before and after thermal treatment using Fourier Transform Infrared (FTIR), X-ray Fluorescence (XRF), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Brunauer-Emmett-Teller (BET). The results demonstrated that the thermal treatment caused the decomposition of CaCO₃ into CaO, which significantly changed the crystal structure and porosity. Oyster shells (OS) had a compact structure, and calcined OS exhibited a rougher surface and increased porosity, making them suitable as a partial cement replacement in the construction fields. Mussel shells (MS) and sea-clam shells (SS) displayed a more fibrous and porous, which can be applied to medium and high adsorption capacities. Calcined MS with its high surface area and modified crystalline structure, demonstrated as an adsorbent for wastewater treatment. While calcined SS displayed the greatest porosity and enhanced reactivity, offers promising applications in bio-ceramic materials, excellent potential as an adsorbent as well as in the drug delivery systems. These findings underscore the effect of thermal treatment in enhancing the functionality of seashell-derived materials, facilitating their broader utilization in sustainable industrial applications.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 3","pages":"1015 - 1025"},"PeriodicalIF":2.6,"publicationDate":"2025-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148365886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of rice husk ash extracted heat treated Si3N4 ceramic on mechanical, wear and low cycle fatigue behaviour of hybrid pineapple/basalt fiber reinforced polyester composite","authors":"J. Jesumanen,&nbsp;M. Chandrasekaran,&nbsp;P. BabuAurtherson,&nbsp;M. Arul Murugan","doi":"10.1007/s41779-025-01304-x","DOIUrl":"10.1007/s41779-025-01304-x","url":null,"abstract":"<div><p>Increasing material innovation toward reduce the usage of heavy metals, which are increased consumption of fossil fuel, and exploitation of fossil reserves. As a result of this the bio composite light weight material is now gets researched by scientist across various domain of application. The primary aim of the research is to investigate the mechanical, fatigue, water absorption and flammability behaviour of the hybrid pineapple/basalt fiber with heat treated rice husk ash Si₃N₄composite. PBS1 (polyester, 40 vol.%basalt/pineapple fiber, 1 vol% silicon nitride Si₃N₄) and PPS1 (polyester, 40 vol% pineapple/basalt fiber, 1 vol% silicon nitride)had the highest mechanical properties of among all the tested specimens, including tensile strengths of 147.8 MPa, 132 MPa, flexural strengths of 190 MPa, 197 MPa, impact strengths of 5.45 J, 4.8 J, and fatigue life counts of 13,428 and 16,860 cycles. This increased results from the distribution of stress, which prevents cracks from spreading and lessens Si₃N₄deformation by enhancing structural integrity overall. Due to the strong link between the natural fibers and matrix, as well as the high cellulose content that improves adhesion and overall stiffness of the composite. However, the composite specimen PBS2 and PPS2 with 40 vol% fiber and 3 vol% Si₃N₄demonstrated respectively, high hardness, and water absorption of 81 shore-D, 84 shore-D, 0.241%, and 0.34%. Also Si₃N₄absorbs more water due to its porous nature, and its ceramic properties increase its hardness. Furthermore, the composite specimen, PBS2 shows reduced flame propagation speed of 8.1 mm/min, which represents reduced flammability by preventing combustion and forming a heat-resistant barrier.The composites that showed the best in-vitro performance were PBS2 (basalt fiber + 3 vol% Si₃N₄) and PPS2 (pineapple fiber + 3 vol.%Si₃N₄). Following four weeks of immersion in SBF, PBS2 had the lowest swelling rate of 2.1% and PPS2 the lowest degradation rate of 0.55%. The most biocompatible systems were found to be PBS2 and PPS2, and these results show that silane-treated Si₃N₄ fillers effectively improve chemical stability and bioactivity. These hybrid biocomposites with improved properties could be utilised in the automotive, human prosthetic, biomedical and packaging sectors.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 3","pages":"1117 - 1129"},"PeriodicalIF":2.6,"publicationDate":"2025-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148366072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of gamma-ray shielding performance of cement composites reinforced with activated magnesium slag","authors":"Abdul Vahap Korkmaz,&nbsp;Elif Kemah","doi":"10.1007/s41779-025-01301-0","DOIUrl":"10.1007/s41779-025-01301-0","url":null,"abstract":"<div><p>With the rapid advancement of industrial and technological applications, adequate protection against ionizing radiation has become increasingly critical. While radiation is widely utilized in medicine, energy, industry, and research, uncontrolled exposure poses serious biological risks. Heavy metals like lead have traditionally been used as shielding materials due to their high density and atomic number; however, their toxicity and environmental hazards have spurred the search for safer alternatives. In this context, eco-friendly, cost-effective, and industrially viable materials—particularly cement-based composites—have emerged as promising candidates for radiation shielding applications. This study systematically investigates the gamma radiation shielding performance of cement composites incorporating activated magnesium slag, a by-product generated during magnesium metal production at elevated temperatures under varying cooling conditions. Key shielding parameters—including mass attenuation coefficient (μ/ρ), linear attenuation coefficient (LAC), half-value layer (HVL), effective atomic number (Z_eff), and effective electron density (N_eff)—were evaluated both theoretically and experimentally across different photon energies (0.511, 0.662, 1.173, 1.275, and 1.332 MeV). The results reveal that the cement samples exhibit notably high μ/ρ values at low photon energy (0.511 MeV), while increased energy levels lead to a rise in HVL and LAC and a slight decrease in Z_eff and N_eff. Importantly, the cement produced with magnesium slag activated at high temperatures and rapidly cooled demonstrates photon attenuation capabilities comparable to the other samples. These findings highlight the potential of such sustainable composites as efficient and environmentally responsible shielding materials for gamma radiation in future applications.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 3","pages":"1073 - 1089"},"PeriodicalIF":2.6,"publicationDate":"2025-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148366036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of application of nano and micro particle rare earth oxide reinforced composite brake pads on braking performance in agricultural vehicles","authors":"Yavuz Şüküroğlu,&nbsp;Ersan Mertgenç,&nbsp;Hicri Yavuz","doi":"10.1007/s41779-025-01303-y","DOIUrl":"10.1007/s41779-025-01303-y","url":null,"abstract":"<div><p>Even though research on materials reinforced with rare earth oxide is growing, there is still a gap, especially in brake friction materials. The performance of CeO₂-reinforced brake friction materials for agricultural vehicles at the nano and microscales was assessed in this work. Changes in the brake disk’s surface roughness and the samples’ friction properties were examined. Wear mechanisms were examined using scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD). The samples exhibited stable friction coefficients, with coefficients determined as 0.25 for nano-sized 5% and 10% CeO₂ samples, 0.26 for micro-sized 5% sample, and 0.27 for micro-sized 10% sample. Micro-sized CeO₂ samples exhibited lower wear rates compared to nano-sized ones. The average hardness of the samples was 94 Shore D, and the hardness of both micro- and nano-sized samples increased with increasing CeO₂. Roughness analyses revealed that CeO₂ addition significantly reduced the density of scratches and indentations on the disk surface. SEM examinations identified primary and secondary plateaus, microcracks, and friction-induced scratches on the wear surfaces. This study contributes significantly to the performance optimization and understanding of wear behavior of rare earth oxide-reinforced brake materials and highlights their potential for industrial applications by minimizing disk surface roughness.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 3","pages":"1105 - 1115"},"PeriodicalIF":2.6,"publicationDate":"2025-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148366037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of calcined concrete waste powder as supplementary cementitious material: a comprehensive study on performance and sustainability","authors":"Nurullah Öksüzer,&nbsp;Muhammed Talha Ünal","doi":"10.1007/s41779-025-01302-z","DOIUrl":"10.1007/s41779-025-01302-z","url":null,"abstract":"<div><p>Construction and demolition waste (CDW) represents approximately 25–30% of total waste production in the EU, necessitating innovative recycling strategies to achieve the mandated 70% recycling rate. This study systematically investigates the performance of calcined concrete waste powder (CCWP) as a sustainable supplementary cementitious material (SCM) for partial Portland cement replacement in mortar mixtures. Six mortar compositions with CCWP replacement levels of 0%, 10%, 20%, 30%, 40%, and 50% were evaluated through comprehensive mechanical testing, microstructural analysis, durability assessment under aggressive environments, and life cycle assessment. The calcination process at 1000 °C for 2 h enhanced the pozzolanic reactivity of concrete waste by transforming calcium hydroxide into reactive phases. Results demonstrate that 20% CCWP replacement achieves optimal performance, delivering 99 MPa compressive strength at 90 days (7.6% improvement over control) while maintaining 101.7% of reference flexural strength. Microstructural analysis via ultrasonic pulse velocity confirmed enhanced densification, with UPV increasing from 4.23 km/s to 4.56 km/s. Durability testing revealed superior acid resistance with 50–53% reduction in mass loss under H₂SO₄ exposure and improved brine resistance. Environmental assessment indicates 20% CCWP reduces CO₂ emissions by 4.1% (932.81 kg/m³) and production costs by 3.3% ($175.80/m³), achieving optimal eco-efficiency ratios of 9.42 kg CO₂/MPa and $1.78/MPa. Higher replacement levels (≥ 30%) resulted in decreased mechanical properties due to dilution effects, despite continued environmental benefits. The findings validate CCWP’s viability as a sustainable SCM at moderate replacement levels, contributing to circular economy principles while maintaining structural integrity and reducing the construction industry’s carbon footprint.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 3","pages":"1091 - 1104"},"PeriodicalIF":2.6,"publicationDate":"2025-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148365884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photocatalytic degradation of methylene blue dye under visible light irradiation by CBTS photoactive catalysts as a function of annealing temperature","authors":"Adel Chihi","doi":"10.1007/s41779-025-01300-1","DOIUrl":"10.1007/s41779-025-01300-1","url":null,"abstract":"<div><p>In this work, Cu₂BaSnS₄ (CBTS) thin films were synthesized on ITO conductive glass substrate via a sol-gel dip-coating method and investigated for their photocatalytic performance in degrading methylene blue (MB) under visible light irradiation. The effects of annealing temperature on film morphology, crystallinity, and optical properties were systematically studied. The film optimized at an annealing temperature of 500 °C exhibited a compact morphology with moderate agglomeration, which favors enhanced light absorption and provides a higher density of active sites for photocatalytic activity. X-ray diffraction and Raman spectroscopy confirmed the formation of single-phase CBTS, while UV-Vis analysis revealed a direct bandgap of approximately 1.84 eV. X-ray photoelectron spectroscopy analysis confirmed the presence of Cu⁺, Ba²⁺, Sn⁴⁺, and S²⁻ oxidation states, validating the chemical composition and purity of the CBTS phase for all the annealed samples. Photocatalytic tests showed a maximum MB degradation efficiency of 91.8% within 60 min under visible light. Scavenger experiments identified photogenerated holes as the dominant reactive species. These findings highlight the potential of CBTS thin films as efficient visible-light-active photocatalysts for wastewater treatment applications.</p></div>","PeriodicalId":673,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"62 3","pages":"1055 - 1071"},"PeriodicalIF":2.6,"publicationDate":"2025-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148365949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}