{"title":"Enhancing CO2 adsorption in Ca-based materials via atomic layer deposition of alumina: Mechanisms and stability","authors":"Caifeng Huang , Tao Wang , Hemin Hu , Jian Qi","doi":"10.1016/j.matchemphys.2025.131631","DOIUrl":"10.1016/j.matchemphys.2025.131631","url":null,"abstract":"<div><div>Calcium-based thermochemical energy storage materials (Ca(OH)<sub>2</sub>/CaCO<sub>3</sub>) have emerged as promising candidates for industrial waste heat recovery and solar thermal storage applications, owing to their exceptional energy storage density (3.2 GJ/m<sup>3</sup>) and cost-effectiveness (<50 $/ton). However, their practical implementation faces significant challenges due to performance degradation caused by sintering and particle agglomeration during cyclic operation. This study demonstrates a synergistic approach combining atomic layer deposition (ALD) of Al<sub>2</sub>O<sub>3</sub> coatings and Al<sup>3+</sup> doping to enhance CO<sub>2</sub> capture in calcium-based materials. Through controlled ALD processing, we achieved nanoscale Al<sub>2</sub>O<sub>3</sub> layers (∼3.6 nm) on CaCO<sub>3</sub> substrates. The 20 deposition cycles identified as optimal for balancing Al dispersion and pore accessibility. Materials characterization revealed that Ca(OH)<sub>2</sub>-derived samples exhibited superior cyclic stability (after 20 cycles) and thermal storage density (∼2400 kJ/kg). Density functional theory calculations uncovered the atomic-scale mechanisms behind these improvements. Al element doping reduced oxygen vacancy formation energy and shortened Al–O bonds by 21 % (1.89 Å vs. Ca–O 2.40 Å), enhancing structural stability. CO<sub>2</sub> adsorption on Al-doped surfaces adopted a bent configuration (135°). In humid conditions, H<sub>2</sub>O co-adsorption further improved performance through a unique [Al–OH<sub>2</sub>⋯O<img>C<img>O⋯Ca] bridge structure, promoting bicarbonate formation.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"348 ","pages":"Article 131631"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"MXene-modified SASN: A composite with broad-spectrum absorption and microwave response","authors":"Maoguo Zhu , Chang Xu , Qiang Li , Pengju Dong , Haibin Xu , Suhang Chen , Kangzhen Xu","doi":"10.1016/j.matchemphys.2025.131637","DOIUrl":"10.1016/j.matchemphys.2025.131637","url":null,"abstract":"<div><div>To address the limitations of narrow-spectral absorption and poor microwave response of silver acetylide-silver nitrate (SASN, a light-initiated explosive), a SASN@MXene (x%) composite with different MXene contents (0.5–1.5 wt%) was prepared via electrostatic self-assembly. MXene with 1.0 wt% exhibits an ideal balance between photosensitivity, energy release and combustion behavior. Compared with pure SASN, SASN@MXene (1.0 %) exhibits not only a broad-spectrum absorption characteristic but also significantly enhanced photosensitivity with improvements of 80.0 % in the visible waveband (450–750 nm) and 57.1 % in the infrared waveband (2500–25000 nm), respectively. In addition, SASN@MXene (1.0 %) shows a fast microwave response with an ignition delay of 54.7 ms and an ignition power threshold of 20.0 W, while pure SASN failed to ignite under the same conditions. Notably, the SASN@MXene (1.0 %) also exhibits an optimal combustion behavior with the maximizing pressurization rate. The experimental results show that the addition of MXene effectively extends the light absorption spectrum of SASN, while the microwave response of SASN is also enhanced. This work provides a modified approach for creating multi-stimuli-response of SASN.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"348 ","pages":"Article 131637"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Laxmikanta Mahapatra , Prabhukrupa C. Kumar , D. Alagarasan , C. Sripan , R. Naik
{"title":"Laser-irradiated Ag/Sb20S40Se40 heterostructure film for enhanced photodetector application","authors":"Laxmikanta Mahapatra , Prabhukrupa C. Kumar , D. Alagarasan , C. Sripan , R. Naik","doi":"10.1016/j.matchemphys.2025.131638","DOIUrl":"10.1016/j.matchemphys.2025.131638","url":null,"abstract":"<div><div>Ag/Sb<sub>20</sub>S<sub>40</sub>Se<sub>40</sub> heterostructure films were fabricated by thermal evaporation and modified through 532 nm laser irradiation at varying durations (0–90 min) to investigate their optoelectronic properties. Structural analysis confirmed the films remained amorphous after irradiation, while FESEM and TEM studies revealed distinct surface morphology modifications. Contact angle measurements showed a transition from hydrophilic (67°) to nearly hydrophobic (89°), enhancing self-cleaning potential. Optical characterization demonstrated a blue shift in the absorption edge, with the bandgap widening from 1.437 eV to 1.542 eV, alongside a decrease in Urbach energy from 324 meV to 262 meV, indicating reduced defect density and improved structural order. Transmittance increased from 88 % to 97 %, accompanied by decreased extinction coefficient and optical conductivity. Dielectric studies revealed lower dielectric loss with an increased quality factor, while nonlinear optical analysis showed a reduction in χ(3) from 8.68 × 10<sup>−11</sup> to 5.31 × 10<sup>−11</sup> esu and n<sub>2</sub> from 1.02 × 10<sup>−9</sup> to 6.66 × 10<sup>−10</sup>, with a corresponding enhancement in the figure of merit. Photodetection performance was markedly improved after 90 min irradiation, with photosensitivity rising from 91 % to 162 %, responsivity from 1.37 × 10<sup>−8</sup> to 2.07 × 10<sup>−6</sup> A W<sup>−1</sup>, and detectivity from 2.02 × 10<sup>6</sup> to 2.91 × 10<sup>7</sup> Jones. These results establish laser irradiation as an efficient route to engineer the optical and electronic behavior of Ag/Sb<sub>20</sub>S<sub>40</sub>Se<sub>40</sub> films for advanced optoelectronic and UV photodetector applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"348 ","pages":"Article 131638"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ag2CO3/α-Fe2O3 n-n heterojunction photocatalyst for efficient degradation of orange G under visible light irradiation","authors":"Sara Ghazi, Benaissa Rhouta","doi":"10.1016/j.matchemphys.2025.131628","DOIUrl":"10.1016/j.matchemphys.2025.131628","url":null,"abstract":"<div><div>This study focuses on the development of an Ag<sub>2</sub>CO<sub>3</sub>/α-Fe<sub>2</sub>O<sub>3</sub> composite with an <em>n-n</em> heterojunction structure using a facile precipitation method. The composite was systematically characterized using XRD, Raman, FTIR, SEM-EDS, BET, and UV–Vis DRS, confirming the successful integration of α-Fe<sub>2</sub>O<sub>3</sub> nanorods with Ag<sub>2</sub>CO<sub>3</sub>, enhanced visible-light absorption (E<sub>g</sub> = 1.97 eV <em>vs</em>. 2.37 eV for pure Ag<sub>2</sub>CO<sub>3</sub>), and increased surface area (10.2 m<sup>2</sup>/g <em>vs</em>. 1.3 m<sup>2</sup>/g for Ag<sub>2</sub>CO<sub>3</sub>). The composite exhibited superior photocatalytic performance, achieving 100 % degradation of Orange G (OG) within 60 min under visible light, 85 % mineralization efficiency, and excellent stability with minimal Ag<sup>0</sup> formation. The observed improvements in photocatalytic performance indicate that the formation of an <em>n-n</em> heterojunction generates an internal electric field that facilitates efficient charge separation, as confirmed by photoluminescence and supported by scavenger studies (<sup>⋅</sup>O<sub>2</sub><sup>−</sup>/h<sup>+</sup> as dominant species). In addition, the Z-scheme charge transfer pathway significantly enhances the redox ability of the system. Moreover, α-Fe<sub>2</sub>O<sub>3</sub> nanorods act as both charge-transfer mediators and protective shield against Ag<sub>2</sub>CO<sub>3</sub> photocorrosion. These findings establish the Ag<sub>2</sub>CO<sub>3</sub>/α-Fe<sub>2</sub>O<sub>3</sub> composite as a sustainable and efficient photocatalyst for organic pollutant remediation, effectively addressing the photocorrosion issue of Ag<sub>2</sub>CO<sub>3</sub>.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"348 ","pages":"Article 131628"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Antibiotic and photocatalytic activities of NiO nanoparticles synthesized via Ipomoea sagittifolia leaf extract","authors":"Praveen Kumar Muchinthala, Venkatramana Losetty","doi":"10.1016/j.matchemphys.2025.131630","DOIUrl":"10.1016/j.matchemphys.2025.131630","url":null,"abstract":"<div><div>The biological methods are more efficient than chemical and physical methods for the preparation of nanomaterials due to low-energy consumption, economic, and environmentally beneficial. In this work, Nickel oxide nanoparticles (NiO NP) were prepared using the plant extract of <em>Ipomoea sagittifolia Burm.f</em>. From UV–visible spectroscopy, a notable absorption peak at 337 nm and the band gap of 4.1 eV were evaluated from the Taue equation. The bioactive compounds, their functional groups, and the synthesized high-purity phase NPs were analyzed using FTIR spectroscopy. The bands that appeared at 480 cm<sup>−1</sup>, 550 cm<sup>−1</sup> and 690 cm<sup>−1</sup> are indicative of metal-oxygen (Ni–O) interaction modes that are responsible for bending and wagging vibrations. The XRD analysis revealed an FCC phase with excellent crystallinity and a particle size of 88.5 nm. The morphological analysis confirmed that cylindrical and spherical shapes with 86.2 nm of average NP size using SEM and TEM. The EDX and DLS studies were applied to analyze the chemical compositions (55.5 %, 24.6 %, and 10.1 % for Ni, O, and C, respectively) and aggregation behavior of NP. Furthermore, four bacterial strains, two cancerous cell lines (A549 and MCF-7) were used to study the biomedical activity of NiO NP. The zone of inhibition of treated cells was 15 mm and 18 mm for <em>K. pneumoniae, E. coli</em> (Gram-negative) and 14 mm and 12 mm for <em>S. aureus</em> and <em>S. pyogenes</em> (Gram-positive) at 30 μg/mL, respectively. Similarly, MCF-7 showed 71.7 % of cell inhibition than A549 cell inhibition of 70.5 % at 100 μg/mL. The interaction between the ligands such as bioactive compound, four antibacterial, two anticancer strains, and bio-mediated NiO NP with various proteins were investigated using a molecular docking computational study. The binding efficiency of NiO NP showed as −4.04, −3.66, −3.92, and −4.66 kcal/mol against bacterial strains of <em>S. aureus</em>, <em>S. Pyogenes, K. pneumoniae,</em> and <em>E.coli</em>, respectively. The cancer cell lines such as MCF-7, and A549 with NiO NP showed the highest binding energies of −3.74, −3.43 kcal/mol, respectively. Additionally, the capacity of photocatalytic methylene blue dye degradation was investigated when exposed to direct sunlight, 96.6 % degradation was noticed after 90 min of irradiation. The radical scavenger analysis was performed using the various scavengers, and reusability assessment was carried out at the desired conditions.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"348 ","pages":"Article 131630"},"PeriodicalIF":4.7,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Thanh-Thang Le Nguyen , Tuan-Anh Ngoc Tran , Phuong Hoang Tran , Tan Le Hoang Doan , Hai Truong Nguyen
{"title":"Ionic liquid-grafting of pineapple peel-derived graphene oxide on Cu substrate for catalytic synthesis of thiazolo[3,2-a][1,3,5]triazin-6(7H)-one derivatives","authors":"Thanh-Thang Le Nguyen , Tuan-Anh Ngoc Tran , Phuong Hoang Tran , Tan Le Hoang Doan , Hai Truong Nguyen","doi":"10.1016/j.matchemphys.2025.131622","DOIUrl":"10.1016/j.matchemphys.2025.131622","url":null,"abstract":"<div><div>In this study, a novel eco-friendly catalyst, GO/HNO<sub>3</sub>/Cu/IL, was developed from graphene oxide derived from pineapple (<em>Ananas comosus</em>) peel, functionalized with copper and ionic liquid. The synthesis involved pyrolysis, Hummers’ oxidation, nitric acid treatment, Cu<sup>2+</sup> doping, and IL grafting, and the material was fully characterized (FT-IR spectroscopy, Raman spectroscopy, XRD analysis, ICP-MS analysis, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and thermogravimetric analysis (TGA)). This GO/HNO<sub>3</sub>/Cu/IL (5 mg) was applied for the one-pot, three-component Mannich reaction of arylaldehyde, thioglycolic acid, and dicyandiamide to afford thiazolo[3,2-<em>a</em>][1,3,5]triazin-6(7<em>H</em>)-one derivatives under water at 100 °C for 3 h gave the good yield (up to 51 %), and the material exhibited excellent recyclability with potential for large-scale synthesis.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"348 ","pages":"Article 131622"},"PeriodicalIF":4.7,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Venkata Dinesh Avvari , PS Rama Sreekanth , Mohammad Hassan Shahavi , Robert Olejnik , Nadir Ayrilmis , Ragavanantham Shanmugam
{"title":"Advances in electrospun nanofibrous yarns: Improved functionality and emerging applications","authors":"Venkata Dinesh Avvari , PS Rama Sreekanth , Mohammad Hassan Shahavi , Robert Olejnik , Nadir Ayrilmis , Ragavanantham Shanmugam","doi":"10.1016/j.matchemphys.2025.131621","DOIUrl":"10.1016/j.matchemphys.2025.131621","url":null,"abstract":"<div><div>Electrospinning is a breakthrough technique in materials science that enables the fabrication of polymer yarns with extraordinary nanoscale precision previously unattainable. Nanofiber-based yarns produced by the electrospinning process show unique structural and functional properties differing from traditional materials, such as an incredibly high surface area, mechanical properties leading to significantly increased durability, and architectures that can be designed according to specific requirements. This review details the transformative influence of electrospinning on yarn technology, emphasizing its incredible potential to go beyond the conventional constraints that have previously limited this field and thus fuel innovation in a vast range of applications across many industries. Thanks to innovative nanotechnology applications and high-end materials engineering, electrospun nanofibrous yarns have seriously redefined standards in many important areas, such as environmental sustainability, energy solutions, wearable technology, and biomedicine. However, significant challenges persist, requiring further scale-up and process optimization. This review emphasizes advancements made so far in the art of the electrospinning process for yarn development in pivotal positions for next-generation progress. The future of nanofiber-based yarns and their integration underscores the importance of such yarns in solving current global challenges.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"348 ","pages":"Article 131621"},"PeriodicalIF":4.7,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Structural characterization, vibrational, optical properties, and DFT investigation of a novel lead-free hydrothermally synthesized 1D iodobismuthate (III) organic-inorganic perovskite hybrid material, (C9H10N3)[BiI4]·H2O","authors":"Amin Alibi , Nour Elleuch , Emna Khdhiri , Manel Ben Hassen , Sergiu Shova , Fakher Chabchoub , Mohamed Boujelbene","doi":"10.1016/j.matchemphys.2025.131617","DOIUrl":"10.1016/j.matchemphys.2025.131617","url":null,"abstract":"<div><div>A novel one-dimensional lead-free organic-inorganic hybrid perovskite, (C<sub>9</sub>H<sub>10</sub>N<sub>3</sub>)[BiI<sub>4</sub>]·H<sub>2</sub>O, comprising the rare 3-methyl-1-phenyl-1H-1,2,4-triazolium cation, was successfully synthesized via a hydrothermal method. This material exhibits a previously unreported structural configuration, where the [BiI<sub>4</sub>]<sup>-</sup> anions form 1D infinite chains stabilized by an uncommon combination of π–π stacking and hydrogen bonding interactions, creating a highly ordered and robust framework. Unlike most known iodobismuthate hybrids, which typically favor 0D or 2D structures, this compound represents a rare example of a structurally stable 1D halobismuthate architecture featuring this particular cation. Single-crystal X-ray diffraction revealed its triclinic symmetry and distinct inorganic chain alignment. Optical investigations demonstrated a direct band gap of 3.59 eV and strong blue-violet photoluminescence with excitation-dependent chromaticity, a feature rarely reported in similar bismuth-based systems. Comprehensive DFT calculations confirmed the electronic band structure and revealed the nature of non-covalent interactions through RDG, MEP, ELF, and LOL analyses. The integration of unique structural elements with exceptional optoelectronic behavior highlights the novelty and multifunctional potential of this compound as a sustainable alternative to lead-based perovskites for UV-emitting and photonic applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"348 ","pages":"Article 131617"},"PeriodicalIF":4.7,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Amin Al-Fakih , Madyan A. Al-Shugaa , Monther Q. Alkoshab , Sagheer A. Onaizi , Bing Chen
{"title":"Holistic effect of GO@ZIF-8 nanohybrids in LC3-based mortar","authors":"Amin Al-Fakih , Madyan A. Al-Shugaa , Monther Q. Alkoshab , Sagheer A. Onaizi , Bing Chen","doi":"10.1016/j.matchemphys.2025.131618","DOIUrl":"10.1016/j.matchemphys.2025.131618","url":null,"abstract":"<div><div>Limestone calcined clay cement (LC<sup>3</sup>) offers a low-carbon alternative to Portland cement but has limitations, including drying shrinkage and reduced early compressive strength. This study explores nanohybrids to enhance LC<sup>3</sup> mortar properties. A new hybrid of graphene oxide and zeolitic imidazolate framework-8 (GO@ZIF-8) was synthesized and added to LC<sup>3</sup> mortar in varying dosages. Tests on hardened LC<sup>3</sup> mortar measured improvements in compressive strength, drying shrinkage, water absorption, heat of hydration, and microstructure. Results showed 0.2 wt% GO@ZIF-8 increased compressive strength slightly by 2.9 % and reduced drying shrinkage by 9.1 %, though porosity rose by 6.67 %, and water absorption increased from 2.8 % (control) to 3.06 % and 3.20 % with 0.2 and 0.4 wt% GO@ZIF-8. Adding 0.3 wt% accelerated Phase II hydration, enhancing hydration products and crystallinity in LC<sup>3</sup> mortar, confirmed by SEM images showing a densified microstructure with well-dispersed GO@ZIF-8 particles. Additionally, thermogravimetric analysis confirmed that GO@ZIF-8 incorporation enhances hydration efficiency. However, higher dosages led to microstructural defects, reducing strength, and highlighting the need for dosage optimization. This research demonstrates the potential of nanohybrid, like GO@ZIF-8, to improve construction materials, although single nanoparticles may offer a more sustainable approach.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"348 ","pages":"Article 131618"},"PeriodicalIF":4.7,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Gécica C. Bellettini, Mariana Souza-Pereira, Renata M. Benetti, Fábio Elyseu, Alexandre G. Dal-Bó, Adriano M. Bernardin
{"title":"Stress test of magnetite nanoparticles synthesized by controlled precipitation for the degradation of dyes under UV and visible radiation","authors":"Gécica C. Bellettini, Mariana Souza-Pereira, Renata M. Benetti, Fábio Elyseu, Alexandre G. Dal-Bó, Adriano M. Bernardin","doi":"10.1016/j.matchemphys.2025.131626","DOIUrl":"10.1016/j.matchemphys.2025.131626","url":null,"abstract":"<div><div>Magnetite nanoparticles were synthesized via controlled precipitation without thermal treatment using Fe<sup>2+</sup>/Fe<sup>3+</sup> ions (1:2 M ratio) precipitated in NH<sub>4</sub>OH at 75 °C. Comprehensive characterization revealed pure magnetite phase with 14.7 nm crystallite size (Scherrer equation), 60 m<sup>2</sup>/g specific surface area (BET), and superparamagnetic behavior (Hc = 15.5 Oe). Photocatalytic efficiency was evaluated through photo-Fenton process under UVA and visible radiation (10 W/m<sup>2</sup>) for methylene blue and rhodamine B degradation. Magnetite achieved 98 % methylene blue degradation under UVA and 93 % under visible light, maintaining 90 % efficiency after four stress test cycles. Rhodamine B showed 45 % degradation under UVA and 24 % under visible light. The superparamagnetic properties enabled efficient magnetic recovery and reuse without significant activity loss. This synthesis route provides a viable, energy-efficient approach for producing recoverable photocatalysts with sustained performance under repeated use cycles.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"348 ","pages":"Article 131626"},"PeriodicalIF":4.7,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}