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CuMn2O4-BaTiO3 nanocomposites: Efficient photocatalysts for visible-light-driven degradation of tetracycline

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2025-01-13 DOI: 10.1016/j.materresbull.2025.113316

Hind Alshaikh , Soliman I. El-Hout

Water pollution has recently emerged as one of the world's most severe problems, notably water pollution from organic pollutants. Photocatalysis has recently received much interest as one of the advanced oxidation processes that uses reactive oxygen species to eliminate organic contaminants. To overcome the challenges of fast recombination and instability, researchers are working on developing a recyclable and cost-effective photocatalyst. This study describes a facile pathway for the synthesis of Barium titanate (BaTiO₃) nanocrystals using a hydrothermal-calcination strategy, along with their integration with (5.0–20.0 wt%) CuMn₂O₄ (CMO) to form CMO-BaTiO₃ nanocomposites. Surface and optical investigations demonstrated a mesoporous structure, with surface areas between 113 and 125 m²/g and improved visible light capture capabilities, with a bandgap energy of at least 2.77 eV, making them suitable for photocatalytic uses under visible illumination. Moreover, the photocatalytic properties of CMO-BaTiO₃ have not been previously explored. The optimized 15% CMO-BaTiO₃ photocatalyst demonstrated exceptional performance in degrading Tetracycline (TC) antibiotic, achieving complete removal in 60 min over 2.0 g/L and total organic carbon removal of 93% with an elimination rate constant of 0.358 min^-1, retaining 90% of its original photocatalytic efficiency after five cycles. The enhanced photocatalytic activity is attributed to the formation of a CMO-BaTiO₃ heterojunction, which facilitates outstanding light capture and remarkable charge separation. This research manifests the potential of BaTiO₃-based photocatalysts in water remediation applications and corresponding industries.

{"title":"CuMn2O4-BaTiO3 nanocomposites: Efficient photocatalysts for visible-light-driven degradation of tetracycline","authors":"Hind Alshaikh , Soliman I. El-Hout","doi":"10.1016/j.materresbull.2025.113316","DOIUrl":"10.1016/j.materresbull.2025.113316","url":null,"abstract":"<div><div>Water pollution has recently emerged as one of the world's most severe problems, notably water pollution from organic pollutants. Photocatalysis has recently received much interest as one of the advanced oxidation processes that uses reactive oxygen species to eliminate organic contaminants. To overcome the challenges of fast recombination and instability, researchers are working on developing a recyclable and cost-effective photocatalyst. This study describes a facile pathway for the synthesis of Barium titanate (BaTiO3) nanocrystals using a hydrothermal-calcination strategy, along with their integration with (5.0–20.0 wt%) CuMn2O4 (CMO) to form CMO-BaTiO3 nanocomposites. Surface and optical investigations demonstrated a mesoporous structure, with surface areas between 113 and 125 m2/g and improved visible light capture capabilities, with a bandgap energy of at least 2.77 eV, making them suitable for photocatalytic uses under visible illumination. Moreover, the photocatalytic properties of CMO-BaTiO3 have not been previously explored. The optimized 15% CMO-BaTiO3 photocatalyst demonstrated exceptional performance in degrading Tetracycline (TC) antibiotic, achieving complete removal in 60 min over 2.0 g/L and total organic carbon removal of 93% with an elimination rate constant of 0.358 min-1, retaining 90% of its original photocatalytic efficiency after five cycles. The enhanced photocatalytic activity is attributed to the formation of a CMO-BaTiO3 heterojunction, which facilitates outstanding light capture and remarkable charge separation. This research manifests the potential of BaTiO3-based photocatalysts in water remediation applications and corresponding industries.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"185 ","pages":"Article 113316"},"PeriodicalIF":5.3,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103930","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}

引用次数: 0

Supercapacitor featuring Ti3C2Tx MXene electrode: Nanoarchitectonics and electrochemical performances in aqueous and non-aqueous electrolytes

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2025-01-13 DOI: 10.1016/j.materresbull.2025.113315

Anu M A , Merin Tomy , Manimehala U , Xavier T S

Ti₃C₂Tx MXenes, synthesized via HCl+LiF etching, show promise as pseudocapacitive electrodes for electrochemical energy storage, addressing the low voltage limitation of aqueous supercapacitors (SCs). This study explores Ti₃C₂Tx MXene electrodes in aqueous and gel electrolytes, specifically H₂SO₄ and H₃PO₄. Electrochemical testing, based on Dunn's approach, confirms supercapacitor-like performance, with specific capacitances of 299 F/g in 1 M aqueous H₃PO₄ and 212 F/g in H₂SO₄ at a 5 mV/s scan rate. Remarkably, in symmetric SCs with 1 M H₃PO₄, Ti₃C₂Tx MXene retains 95% capacitance at 1 V after 25,000 cycles, demonstrating excellent stability. Additionally, Ti₃C₂Tx in a 1 M gel H₃PO₄ electrolyte achieves a higher energy density of 72 Wh/kg within a 1.6 V window than with gel H₂SO₄, highlighting the impact of electrolyte choice. These findings underscore MXenes' potential as stable, high-rate electrodes for sustainable supercapacitors.

引用次数: 0

Oxygen vacancy association induced changes in photoluminescence of Eu3+ doped CeO2 codoped with Sc3+ and La3+

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2025-01-10 DOI: 10.1016/j.materresbull.2025.113303

Debarati Das , Annu Balhara , Santosh K. Gupta , Kathi Sudarshan

Defects recently have been found to enrich the materials with various functional properties if they are controlled and present in moderate amounts. Engineering defects through aliovalent doping was found to be one of the most sought out strategies in CeO₂ for various technological applications. The emission from Eu³⁺ is sensitive to its local surroundings. In this study, 20 % (La³⁺+Sc³⁺) codoped CeO₂:4 % Eu³⁺ samples with varying relative amounts of La³⁺ and Sc³⁺ are prepared and their emission characteristics are studied. Keeping the total trivalent content constant allowed understanding the subtle effect of vacancy distribution vis-à-vis Eu³⁺ and their influence of emission characteristics. The study shows that smaller trivalent ion scavenges the oxygen vacancies away from Eu³⁺ while larger trivalent ions facilitate the association of oxygen vacancies with Eu³⁺. The distribution of oxygen vacancies relative to Eu³⁺ allowed to tune color of emission and also enhanced emission lifetimes.

{"title":"Oxygen vacancy association induced changes in photoluminescence of Eu3+ doped CeO2 codoped with Sc3+ and La3+","authors":"Debarati Das , Annu Balhara , Santosh K. Gupta , Kathi Sudarshan","doi":"10.1016/j.materresbull.2025.113303","DOIUrl":"10.1016/j.materresbull.2025.113303","url":null,"abstract":"<div><div>Defects recently have been found to enrich the materials with various functional properties if they are controlled and present in moderate amounts. Engineering defects through aliovalent doping was found to be one of the most sought out strategies in CeO2 for various technological applications. The emission from Eu3+ is sensitive to its local surroundings. In this study, 20 % (La3++Sc3+) codoped CeO2:4 % Eu3+ samples with varying relative amounts of La3+ and Sc3+ are prepared and their emission characteristics are studied. Keeping the total trivalent content constant allowed understanding the subtle effect of vacancy distribution vis-à-vis Eu3+ and their influence of emission characteristics. The study shows that smaller trivalent ion scavenges the oxygen vacancies away from Eu3+ while larger trivalent ions facilitate the association of oxygen vacancies with Eu3+. The distribution of oxygen vacancies relative to Eu3+ allowed to tune color of emission and also enhanced emission lifetimes.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"185 ","pages":"Article 113303"},"PeriodicalIF":5.3,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143170445","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}

引用次数: 0

Optimizing Ce-doped Nd-Fe-B magnets for high-efficient grain boundary diffusion of Tb-Fe alloy

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2025-01-09 DOI: 10.1016/j.materresbull.2025.113302

Xuhang Zhang , Chaochao Zeng , Xuefeng Liao , Qing Zhou , Wanqi Qiu , Zhongwu Liu

The grain boundary diffusion (GBD) efficiencies of heavy rare earth (HRE) elements are strongly influenced by the composition of the initial Nd-Fe-B magnets. Here we reported the significant variation of terbium (Tb) diffusion efficiency in the Nd-Fe-B magnets with various cerium (Ce) contents. The magnets with 0 wt. %, 3.71 wt. %, and 8.45 wt. % Ce in the total rare earth content, denoted as Ce0, Ce4, and Ce8 magnets, were employed as the initial magnets. After diffusion by Tb₆₆Fe₃₄ alloy, the coercivity of the Ce0, Ce4, and Ce8 magnets increased from 1196 kA/m, 958 kA/m, and 986 kA/m to 1689 kA/m, 1305 kA/m, and 1711 kA/m, respectively. The Ce8 magnet demonstrated the highest diffusion efficiency of Tb with an increase of 1209 kA·m^-1 by 1 wt. % Tb. The diffused Ce8 magnet also exhibits excellent hysteresis loop squareness due to the superior diffusion behavior of Tb. In the Ce-free magnet, the presence of bulk rare earth (RE) oxides and a fully Tb₂Fe₁₄B structure leads to the wastage of Tb. Microstructure analysis revealed that the formation of a thick grain boundary (GB) layer and the cubic RE₂O₃ phase contribute to the coercivity enhancement of the Ce8 magnet. In contrast, the GB layer in Ce-free magnet is too thin to isolate the Nd₂Fe₁₄B hard magnetic grains effectively. Therefore, to achieve high GBD efficiency for Tb, the Ce8 initial magnet is effective. These findings suggest that the careful selection of initial magnet is crucial for maximizing property enhancement through GBD treatment and ensuring the efficient use of RE resources.

{"title":"Optimizing Ce-doped Nd-Fe-B magnets for high-efficient grain boundary diffusion of Tb-Fe alloy","authors":"Xuhang Zhang , Chaochao Zeng , Xuefeng Liao , Qing Zhou , Wanqi Qiu , Zhongwu Liu","doi":"10.1016/j.materresbull.2025.113302","DOIUrl":"10.1016/j.materresbull.2025.113302","url":null,"abstract":"<div><div>The grain boundary diffusion (GBD) efficiencies of heavy rare earth (HRE) elements are strongly influenced by the composition of the initial Nd-Fe-B magnets. Here we reported the significant variation of terbium (Tb) diffusion efficiency in the Nd-Fe-B magnets with various cerium (Ce) contents. The magnets with 0 wt. %, 3.71 wt. %, and 8.45 wt. % Ce in the total rare earth content, denoted as Ce0, Ce4, and Ce8 magnets, were employed as the initial magnets. After diffusion by Tb66Fe34 alloy, the coercivity of the Ce0, Ce4, and Ce8 magnets increased from 1196 kA/m, 958 kA/m, and 986 kA/m to 1689 kA/m, 1305 kA/m, and 1711 kA/m, respectively. The Ce8 magnet demonstrated the highest diffusion efficiency of Tb with an increase of 1209 kA·m-1 by 1 wt. % Tb. The diffused Ce8 magnet also exhibits excellent hysteresis loop squareness due to the superior diffusion behavior of Tb. In the Ce-free magnet, the presence of bulk rare earth (RE) oxides and a fully Tb2Fe14B structure leads to the wastage of Tb. Microstructure analysis revealed that the formation of a thick grain boundary (GB) layer and the cubic RE2O3 phase contribute to the coercivity enhancement of the Ce8 magnet. In contrast, the GB layer in Ce-free magnet is too thin to isolate the Nd2Fe14B hard magnetic grains effectively. Therefore, to achieve high GBD efficiency for Tb, the Ce8 initial magnet is effective. These findings suggest that the careful selection of initial magnet is crucial for maximizing property enhancement through GBD treatment and ensuring the efficient use of RE resources.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"185 ","pages":"Article 113302"},"PeriodicalIF":5.3,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143170439","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}

引用次数: 0

Characterization of ternary ZrHfN thin films deposited by closed-field dual-cathode DC unbalanced reactive magnetron sputtering: A preliminary investigation on their reusable SERS with high thermal stability

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2025-01-08 DOI: 10.1016/j.materresbull.2025.113301

Wuttichai Phae-ngam , Jedsada Prathumsit , Tanapoj Chaikeeree , Nutdanai Bodinthitikul , Tossaporn Lertvanithphol , Hideki Nakajima , Tula Jutarosaga , Mati Horprathum , Araya Mungchamnankit

The zirconium hafnium nitride thin films as alternative plasmonic sensing for surface-enhanced Raman scattering substrate (SERS) were fabricated by closed-field dual-cathode DC unbalanced magnetron sputtering within a thickness range of 30–70 nm. The influence of film thickness on morphology and structural was investigated by grazing-incidence X-ray diffraction (GIXRD) and field-emission scanning electron microscopy (FE-SEM). The GIXRD results indicated that all the prepared ZrHfN thin films exhibited face-centered cubic structures. Surface-sensitive methods like X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) were employed to understand the chemical composition and the distribution of nitrogen atoms. Furthermore, the SERS performance of the ZrHfN films was evaluated using Rhodamine 6 G (R6 G) as a probe molecule. It was found that the 70-nm ZrHfN thin film demonstrated a SERS enhancement factor of 5.4 × 10⁵ and high reusability (15 cycles). Additionally, our SERS substrates exhibited high thermal stability, which maintains sensitivity after heat treatment at 250 ^οC for 10 min in air ambient. These results highlight the potential of the ZrHfN thin film as an alternative SERS sensor chip for real-world applications.

{"title":"Characterization of ternary ZrHfN thin films deposited by closed-field dual-cathode DC unbalanced reactive magnetron sputtering: A preliminary investigation on their reusable SERS with high thermal stability","authors":"Wuttichai Phae-ngam , Jedsada Prathumsit , Tanapoj Chaikeeree , Nutdanai Bodinthitikul , Tossaporn Lertvanithphol , Hideki Nakajima , Tula Jutarosaga , Mati Horprathum , Araya Mungchamnankit","doi":"10.1016/j.materresbull.2025.113301","DOIUrl":"10.1016/j.materresbull.2025.113301","url":null,"abstract":"<div><div>The zirconium hafnium nitride thin films as alternative plasmonic sensing for surface-enhanced Raman scattering substrate (SERS) were fabricated by closed-field dual-cathode DC unbalanced magnetron sputtering within a thickness range of 30–70 nm. The influence of film thickness on morphology and structural was investigated by grazing-incidence X-ray diffraction (GIXRD) and field-emission scanning electron microscopy (FE-SEM). The GIXRD results indicated that all the prepared ZrHfN thin films exhibited face-centered cubic structures. Surface-sensitive methods like X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) were employed to understand the chemical composition and the distribution of nitrogen atoms. Furthermore, the SERS performance of the ZrHfN films was evaluated using Rhodamine 6 G (R6 G) as a probe molecule. It was found that the 70-nm ZrHfN thin film demonstrated a SERS enhancement factor of 5.4 × 105 and high reusability (15 cycles). Additionally, our SERS substrates exhibited high thermal stability, which maintains sensitivity after heat treatment at 250 οC for 10 min in air ambient. These results highlight the potential of the ZrHfN thin film as an alternative SERS sensor chip for real-world applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"185 ","pages":"Article 113301"},"PeriodicalIF":5.3,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143170443","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}

引用次数: 0

Generation of solid electrolyte interface (SEI) film on graphite negative electrode surface in calcium-ion secondary batteries and its dependence on electrolyte

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2025-01-08 DOI: 10.1016/j.materresbull.2025.113294

Shuzo Yamazaki , Atsuya Miyazaki , Hirotaka Imai , Mikka Nisitani-Gamo , Kiyoharu Nakagawa

Currently, secondary batteries utilizing divalent cations are gaining attention as high-energy-density devices. However, the optimization of electrolytes and materials used in these next-generation batteries has been largely unexplored. Thus, this study focused on calcium-ion batteries (CIBs), which use divalent cations, and investigated the impact of the solid electrolyte interface (SEI) formed by various electrolytes for CIBs on their charge–discharge behavior. Four types of solvents propylene carbonate (PC), dimethyl carbonate (DMC), dimethyl sulfoxide (DMSO), and N,N-dimethylformamide (DMF), were used, and Ca(ClO₄)₂was used as the electrolyte. CIBs using PC and DMC as solvents did not exhibit reversible redox reactions. However, the use of DMSO and DMF enabled reversible redox reactions and increased the charge–discharge capacity. Electrolytes demonstrating reversible charge–discharge contained an SEI with calcium, whereas those that hindered charge–discharge had an SEI with minimal calcium content.

{"title":"Generation of solid electrolyte interface (SEI) film on graphite negative electrode surface in calcium-ion secondary batteries and its dependence on electrolyte","authors":"Shuzo Yamazaki , Atsuya Miyazaki , Hirotaka Imai , Mikka Nisitani-Gamo , Kiyoharu Nakagawa","doi":"10.1016/j.materresbull.2025.113294","DOIUrl":"10.1016/j.materresbull.2025.113294","url":null,"abstract":"<div><div>Currently, secondary batteries utilizing divalent cations are gaining attention as high-energy-density devices. However, the optimization of electrolytes and materials used in these next-generation batteries has been largely unexplored. Thus, this study focused on calcium-ion batteries (CIBs), which use divalent cations, and investigated the impact of the solid electrolyte interface (SEI) formed by various electrolytes for CIBs on their charge–discharge behavior. Four types of solvents propylene carbonate (PC), dimethyl carbonate (DMC), dimethyl sulfoxide (DMSO), and N,N-dimethylformamide (DMF), were used, and Ca(ClO4)2was used as the electrolyte. CIBs using PC and DMC as solvents did not exhibit reversible redox reactions. However, the use of DMSO and DMF enabled reversible redox reactions and increased the charge–discharge capacity. Electrolytes demonstrating reversible charge–discharge contained an SEI with calcium, whereas those that hindered charge–discharge had an SEI with minimal calcium content.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"185 ","pages":"Article 113294"},"PeriodicalIF":5.3,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171534","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}

引用次数: 0

Novel electrocatalytic platform based on graphitic carbon nitride-MoS2 embellished 3D graphene ternary hybrid for enhanced quantification of neurotransmitter serotonin

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2025-01-04 DOI: 10.1016/j.materresbull.2025.113296

Neethu Sebastian , Wan-Chin Yu , Yu Chen Chiu , Deepak Balram , Qianqiao Chen , Salman S. Alharthi , Hamed M Al-Saidi

In this paper, a novel electrochemical sensor based on graphitic carbon nitride-molybdenum disulfide decorated 3D graphene nanosheets (gCN-MoS₂/3DG) was fabricated for precise detection of “feel-good” neurotransmitter, serotonin. Exfoliation of gCN and MoS₂ was conducted via a sonochemical method, and gCN-MoS₂/3DG was prepared using a hydrothermal approach. Cyclic voltammetry and differential pulse voltammetry were used to assess electrocatalytic capabilities of the proposed gCN-MoS₂/3DG modified screen printed carbon electrode, and the findings demonstrated outstanding sensitivity (26.18 μAμM^-1cm^-2) with a low detection limit (0.015 µM) and a broad linear range (1.8–53.8; 53.8–3693.8 μM). The sensor also displayed good selectivity, stability, and reusability with low relative standard deviations. High recovery values close to 100% were obtained after the sensor's practical viability was assessed using real samples including serotonin tablet and human urine.

{"title":"Novel electrocatalytic platform based on graphitic carbon nitride-MoS2 embellished 3D graphene ternary hybrid for enhanced quantification of neurotransmitter serotonin","authors":"Neethu Sebastian , Wan-Chin Yu , Yu Chen Chiu , Deepak Balram , Qianqiao Chen , Salman S. Alharthi , Hamed M Al-Saidi","doi":"10.1016/j.materresbull.2025.113296","DOIUrl":"10.1016/j.materresbull.2025.113296","url":null,"abstract":"<div><div>In this paper, a novel electrochemical sensor based on graphitic carbon nitride-molybdenum disulfide decorated 3D graphene nanosheets (gCN-MoS2/3DG) was fabricated for precise detection of “feel-good” neurotransmitter, serotonin. Exfoliation of gCN and MoS2 was conducted via a sonochemical method, and gCN-MoS2/3DG was prepared using a hydrothermal approach. Cyclic voltammetry and differential pulse voltammetry were used to assess electrocatalytic capabilities of the proposed gCN-MoS2/3DG modified screen printed carbon electrode, and the findings demonstrated outstanding sensitivity (26.18 μAμM-1cm-2) with a low detection limit (0.015 µM) and a broad linear range (1.8–53.8; 53.8–3693.8 μM). The sensor also displayed good selectivity, stability, and reusability with low relative standard deviations. High recovery values close to 100% were obtained after the sensor's practical viability was assessed using real samples including serotonin tablet and human urine.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"185 ","pages":"Article 113296"},"PeriodicalIF":5.3,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143170441","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}

引用次数: 0

Hydrothermally synthesized KNN NPs boosting P(VDF-TrFE) piezoelectricity for energy harvesting and physiological monitoring

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2025-01-04 DOI: 10.1016/j.materresbull.2025.113297

Jizhong Deng , Guoxiang Zhang , Ya Yang , Wenjun Zhu , Zhiyi Wu , Yuanyu Wang

The development of wearable technology has been driven by the increasing demand for flexible and sensitive sensors that can utilize body motion to generate electricity or acquire physiological data for health assessment and rehabilitation. In this work, piezoelectric materials K_0.5Na_0.5NbO₃ nanoparticles (KNN NPs), synthesized through a one-step hydrothermal method, were integrated into poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] films to enhance their electrical properties for application in wearable piezoelectric nanogenerator (PENG) sensors. The maximum content of β phase in the composite film is as high as 83.1 %, which may be attributed to the enhancement of polar interface interactions. The PENG sensors exhibited an open-circuit voltage of 12 V, a short-circuit current of 0.86 µA, and a peak power of 3.18 µW under optimal load, showcasing superior performance and stability over 4700 cycles. Monitoring results from human body motion demonstrated the potential application prospects of PENG sensors in motion analysis and medical rehabilitation.

{"title":"Hydrothermally synthesized KNN NPs boosting P(VDF-TrFE) piezoelectricity for energy harvesting and physiological monitoring","authors":"Jizhong Deng , Guoxiang Zhang , Ya Yang , Wenjun Zhu , Zhiyi Wu , Yuanyu Wang","doi":"10.1016/j.materresbull.2025.113297","DOIUrl":"10.1016/j.materresbull.2025.113297","url":null,"abstract":"<div><div>The development of wearable technology has been driven by the increasing demand for flexible and sensitive sensors that can utilize body motion to generate electricity or acquire physiological data for health assessment and rehabilitation. In this work, piezoelectric materials K0.5Na0.5NbO3 nanoparticles (KNN NPs), synthesized through a one-step hydrothermal method, were integrated into poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] films to enhance their electrical properties for application in wearable piezoelectric nanogenerator (PENG) sensors. The maximum content of β phase in the composite film is as high as 83.1 %, which may be attributed to the enhancement of polar interface interactions. The PENG sensors exhibited an open-circuit voltage of 12 V, a short-circuit current of 0.86 µA, and a peak power of 3.18 µW under optimal load, showcasing superior performance and stability over 4700 cycles. Monitoring results from human body motion demonstrated the potential application prospects of PENG sensors in motion analysis and medical rehabilitation.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"185 ","pages":"Article 113297"},"PeriodicalIF":5.3,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143103934","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}

引用次数: 0

UV light and X-ray induced luminescence properties of Eu3+ and Tb3+ single-doped and double-doped phosphosilicate glasses for LED and scintillator applications

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2025-01-03 DOI: 10.1016/j.materresbull.2025.113295

P. Meejitpaisan , Ramachari Doddoji , S. Kothan , H.J. Kim , Vasudeva Reddy Minnam Reddy , Salh Alhammadi , J. Kaewkhao

Eu³⁺ and Tb³⁺ single-doped and co-doped phosposilicate (P₂O₅ +SiO₂) glasses with the insertion of fluorides (NaF+BaF₂+AlF₃) were fabricated. Absorption and excitation spectra of glasses were studied. With two different (218 and 378 nm) excitations of Eu³⁺ and Tb³⁺, the visible emission spectra (450˗750 nm) consisting of RGB (red-green-blue) colors were obtained. The multipolar interactions involved in the energy transfer (ET) between Eu³⁺ and Tb³⁺ were analyzed through Reisfeld and Dexter's theory. The lifetimes of the co-doped glasses for the ⁵D₀ emission (λ_ex=378 nm) of Eu³⁺ and the ⁵D₄ emission (λ_ex=218 nm) of Tb³⁺ ions were obtained. Further, the asymmetric ratios, integrated intensities, R/G ratios, and ET efficiencies were also evaluated. The scintillation efficiency of glasses determined from radio luminescence (X-ray) was found to be 62%. The color coordinates of the glasses were moved to yellowish-green zone with the CCT (correlative color temperatures) of ≤ 4037 K.

{"title":"UV light and X-ray induced luminescence properties of Eu3+ and Tb3+ single-doped and double-doped phosphosilicate glasses for LED and scintillator applications","authors":"P. Meejitpaisan , Ramachari Doddoji , S. Kothan , H.J. Kim , Vasudeva Reddy Minnam Reddy , Salh Alhammadi , J. Kaewkhao","doi":"10.1016/j.materresbull.2025.113295","DOIUrl":"10.1016/j.materresbull.2025.113295","url":null,"abstract":"<div><div>Eu3+ and Tb3+ single-doped and co-doped phosposilicate (P2O5 +SiO2) glasses with the insertion of fluorides (NaF+BaF2+AlF3) were fabricated. Absorption and excitation spectra of glasses were studied. With two different (218 and 378 nm) excitations of Eu3+ and Tb3+, the visible emission spectra (450˗750 nm) consisting of RGB (red-green-blue) colors were obtained. The multipolar interactions involved in the energy transfer (ET) between Eu3+ and Tb3+ were analyzed through Reisfeld and Dexter's theory. The lifetimes of the co-doped glasses for the 5D0 emission (λex=378 nm) of Eu3+ and the 5D4 emission (λex=218 nm) of Tb3+ ions were obtained. Further, the asymmetric ratios, integrated intensities, R/G ratios, and ET efficiencies were also evaluated. The scintillation efficiency of glasses determined from radio luminescence (X-ray) was found to be 62%. The color coordinates of the glasses were moved to yellowish-green zone with the CCT (correlative color temperatures) of ≤ 4037 K.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"185 ","pages":"Article 113295"},"PeriodicalIF":5.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171530","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}

引用次数: 0

Exploring the structural, morphological, and dielectric properties of Sr and La single-doped and co-doped calcium copper titanate

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2025-01-02 DOI: 10.1016/j.materresbull.2025.113293

Md. Khairul Islam , Md. Shamimur Rahman , Sagor Das , Abdullah Al Masum , Shamima Akhter Urmi , Md. Aminul Islam

Solid solutions comprising CaCu₃Ti₄O₁₂ (CCTO), Ca_0.94La_0.04Cu₃Ti₄O₁₂ (CLCTO-4), Ca_0.88La_0.08Cu₃Ti₄O₁₂ (CLCTO-8), Ca_0.9Sr_0.1Cu₃Ti₄O₁₂ (CSCTO)_, and Ca_0.785Sr_0.2La_0.01Cu₃Ti₄O₁₂ (CSCLTO) were prepared by an environmentally friendly and modified solid-state sintering method to study the crystal structure, surface morphology, dielectric response, and optical properties of the synthesized materials. The XRD patterns ensure the synthesis of a pure phase CCTO with minimal impurities of CuO and TiO₂ found in CCTO, CLCTO-4, and CSCTO samples. The inclusion of both Sr and La in CCTO results in a reduction in the average grain size and enhanced uniformity, along with an enlargement in lattice spacing from 0.260 nm to 0.261 nm for the 220 net plane for CLCTO-8, as evidenced by SEM and TEM images. The impedance spectroscopy depicts co-doping with Sr and La results in a simultaneous increase in dielectric constant (k) and reduction in dielectric loss (tanδ). The CLCTO-8 ceramic exhibits the highest dielectric constant (40,372 at 40 Hz) and lowest dielectric loss (0.007 at 41.5 kHz). The occurrence of mixed Cu⁺/Cu²⁺ and Ti³⁺/Ti⁴⁺ valence states in the co-doped material lattices fosters dipole polarization, increasing the ceramic's dielectric constant. The magnitude of the band gap, as determined by the Tauc plot, shows that the optical band gap increases with La% but drops with Sr, possibly because of the electronic transition between valence and conduction bands.

{"title":"Exploring the structural, morphological, and dielectric properties of Sr and La single-doped and co-doped calcium copper titanate","authors":"Md. Khairul Islam , Md. Shamimur Rahman , Sagor Das , Abdullah Al Masum , Shamima Akhter Urmi , Md. Aminul Islam","doi":"10.1016/j.materresbull.2025.113293","DOIUrl":"10.1016/j.materresbull.2025.113293","url":null,"abstract":"<div><div>Solid solutions comprising CaCu3Ti4O12 (CCTO), Ca0.94La0.04Cu3Ti4O12 (CLCTO-4), Ca0.88La0.08Cu3Ti4O12 (CLCTO-8), Ca0.9Sr0.1Cu3Ti4O12 (CSCTO), and Ca0.785Sr0.2La0.01Cu3Ti4O12 (CSCLTO) were prepared by an environmentally friendly and modified solid-state sintering method to study the crystal structure, surface morphology, dielectric response, and optical properties of the synthesized materials. The XRD patterns ensure the synthesis of a pure phase CCTO with minimal impurities of CuO and TiO2 found in CCTO, CLCTO-4, and CSCTO samples. The inclusion of both Sr and La in CCTO results in a reduction in the average grain size and enhanced uniformity, along with an enlargement in lattice spacing from 0.260 nm to 0.261 nm for the 220 net plane for CLCTO-8, as evidenced by SEM and TEM images. The impedance spectroscopy depicts co-doping with Sr and La results in a simultaneous increase in dielectric constant (k) and reduction in dielectric loss (tanδ). The CLCTO-8 ceramic exhibits the highest dielectric constant (40,372 at 40 Hz) and lowest dielectric loss (0.007 at 41.5 kHz). The occurrence of mixed Cu+/Cu2+ and Ti3+/Ti4+ valence states in the co-doped material lattices fosters dipole polarization, increasing the ceramic's dielectric constant. The magnitude of the band gap, as determined by the Tauc plot, shows that the optical band gap increases with La% but drops with Sr, possibly because of the electronic transition between valence and conduction bands.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"185 ","pages":"Article 113293"},"PeriodicalIF":5.3,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171537","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}

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