Pub Date : 2026-04-01Epub Date: 2026-01-29DOI: 10.1016/j.nxmate.2026.101640
Egbe Terence Awoh , Achisa C. Mecha , Joseph Kiplagat , Stephen K. Kimutai
Palm processing industries leave behind huge amounts of biomass annually which are not usually being disposed of sustainably. This study utilizes fast and feasible means of converting empty palm bunch biomass into supercapacitor electrodes. The two-step carbonization-activation method was used to synthesize the highly porous activated carbon, which was used in the electrodes. The resulting materials exhibited patterns similar to that of reduced graphene oxides (rGO) and a maximum specific surface area of 1375 m2/g. The supercapacitor designed from the porous activated carbon exhibits the greatest specific capacitance of 251 F/g at a scan rate of 1 mV/s, under 6 M KOH electrolyte. The corresponding GCD analysis at 100 mA/g current density was 346 F/g, and about 82.9 % of the original capacitance value was retained even after 5000 GCD cycles. The energy density and power density were 17.16 Wh/kg and 180.1 W/kg, respectively. This work does not only provide a feasible route for the management of palm agro-industrial waste, but also produces carbon materials whose electrochemical performance are competitive to state-of-the-art biomass-derived carbon, offering a sustainable pathway for electrochemical energy storage.
{"title":"Biomass-derived activated carbon from empty fruit bunches for supercapacitor electrodes: Crystallinity and electrochemical analysis","authors":"Egbe Terence Awoh , Achisa C. Mecha , Joseph Kiplagat , Stephen K. Kimutai","doi":"10.1016/j.nxmate.2026.101640","DOIUrl":"10.1016/j.nxmate.2026.101640","url":null,"abstract":"<div><div>Palm processing industries leave behind huge amounts of biomass annually which are not usually being disposed of sustainably. This study utilizes fast and feasible means of converting empty palm bunch biomass into supercapacitor electrodes. The two-step carbonization-activation method was used to synthesize the highly porous activated carbon, which was used in the electrodes. The resulting materials exhibited patterns similar to that of reduced graphene oxides (rGO) and a maximum specific surface area of 1375 m<sup>2</sup>/g. The supercapacitor designed from the porous activated carbon exhibits the greatest specific capacitance of 251 F/g at a scan rate of 1 mV/s, under 6 M KOH electrolyte. The corresponding GCD analysis at 100 mA/g current density was 346 F/g, and about 82.9 % of the original capacitance value was retained even after 5000 GCD cycles. The energy density and power density were 17.16 Wh/kg and 180.1 W/kg, respectively. This work does not only provide a feasible route for the management of palm agro-industrial waste, but also produces carbon materials whose electrochemical performance are competitive to state-of-the-art biomass-derived carbon, offering a sustainable pathway for electrochemical energy storage.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"11 ","pages":"Article 101640"},"PeriodicalIF":0.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-22DOI: 10.1016/j.nxmate.2026.101627
Mohammad Al - Yusar Mubeen, Mohammad Salman Haque, Istiak Ahmed Ovi, MD Abir Hossain, Abdullah All Sayeed, Ruhana Binte Karim
This study aims to investigate the influence of fiber content and sand fillers on the mechanical and physical performance of jute fiber composites. With the increase of fiber percentage, improvements in tensile & flexural strength, impact energy and hardness have been observed. Furthermore, the incorporation of sand fillers led to further enhancement of these properties by limiting crack propagation and reducing internal voids. The composite with 40 % jute fiber with sand fillers exhibited the highest tensile strength (27.1 MPa), flexural strength (47.52 MPa), impact energy (3.33 J) and hardness (76.33). On the other hand, the 20 % jute fiber composite without fillers showed the lowest values. Water absorption and thickness swelling increased with higher fiber percentage but were greatly reduced by the presence of sand fillers. The 20 % fiber composite with fillers absorbed the least amount of water in both distilled and saline environments. Overall, the findings indicate that sand-filled jute fiber composites offer enhanced structural performance and exhibit properties comparable to some hybrid composites, which enables them to be used as automotive interior components, building panels, furniture and protective gear like helmets & pads.
{"title":"Effect of sand particle filler materials on the improvement of mechanical properties of jute fiber composite","authors":"Mohammad Al - Yusar Mubeen, Mohammad Salman Haque, Istiak Ahmed Ovi, MD Abir Hossain, Abdullah All Sayeed, Ruhana Binte Karim","doi":"10.1016/j.nxmate.2026.101627","DOIUrl":"10.1016/j.nxmate.2026.101627","url":null,"abstract":"<div><div>This study aims to investigate the influence of fiber content and sand fillers on the mechanical and physical performance of jute fiber composites. With the increase of fiber percentage, improvements in tensile & flexural strength, impact energy and hardness have been observed. Furthermore, the incorporation of sand fillers led to further enhancement of these properties by limiting crack propagation and reducing internal voids. The composite with 40 % jute fiber with sand fillers exhibited the highest tensile strength (27.1 MPa), flexural strength (47.52 MPa), impact energy (3.33 J) and hardness (76.33). On the other hand, the 20 % jute fiber composite without fillers showed the lowest values. Water absorption and thickness swelling increased with higher fiber percentage but were greatly reduced by the presence of sand fillers. The 20 % fiber composite with fillers absorbed the least amount of water in both distilled and saline environments. Overall, the findings indicate that sand-filled jute fiber composites offer enhanced structural performance and exhibit properties comparable to some hybrid composites, which enables them to be used as automotive interior components, building panels, furniture and protective gear like helmets & pads.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"11 ","pages":"Article 101627"},"PeriodicalIF":0.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146026223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-24DOI: 10.1016/j.nxmate.2026.101645
G. Kavitha , Moganesh Govindhan
A graphene oxide/manganese dioxide (GO/MnO₂) nanocomposite was synthesized via a green, photon-induced method under ambient conditions, avoiding high-temperature processing and chemical reductants. X-ray diffraction confirmed the formation of phase-pure tetragonal α-MnO₂ with an average crystallite size of ∼8 nm, accompanied by the disappearance of the GO (001) peak and the emergence of the rGO (002) reflection, indicating partial photoreduction. FESEM and HRTEM analyses revealed uniform dispersion of MnO₂ nanoparticles (10–20 nm) anchored on wrinkled rGO sheets, with a lattice spacing of 0.309 nm corresponding to the (310) plane of α-MnO₂, evidencing strong interfacial coupling. FTIR spectra exhibited characteristic Mn–O and Mn–O–Mn vibrations at ∼460 and 587 cm⁻¹ , confirming robust oxide formation. Nitrogen adsorption–desorption measurements showed a type-IV isotherm with mesoporosity, delivering a high specific surface area of 194.8 m² g⁻¹ , a pore volume of 0.279 cm³ g⁻¹ , and an average pore radius of 1.55 nm. UV–visible spectroscopy revealed broad absorption with an indirect optical band gap of ∼1.71 eV, attributed to interfacial charge transfer and defect-mediated electronic states. Cytocompatibility studies using HEK-293 cells demonstrated high viability (>87 %) across 12.5–200 µg mL⁻¹ , confirming excellent material tolerance. This work highlights photon-induced synthesis as an energy-efficient and scalable route to engineer nanoscale MnO₂–graphene interfaces with controlled structure, porosity, and electronic properties, relevant for redox-active and surface-driven functional applications.
{"title":"Photon-induced synthesis of GO/MnO₂ nanocomposite for biocompatibility evaluation using HEK-293 cells","authors":"G. Kavitha , Moganesh Govindhan","doi":"10.1016/j.nxmate.2026.101645","DOIUrl":"10.1016/j.nxmate.2026.101645","url":null,"abstract":"<div><div>A graphene oxide/manganese dioxide (GO/MnO₂) nanocomposite was synthesized via a green, photon-induced method under ambient conditions, avoiding high-temperature processing and chemical reductants. X-ray diffraction confirmed the formation of phase-pure tetragonal α-MnO₂ with an average crystallite size of ∼8 nm, accompanied by the disappearance of the GO (001) peak and the emergence of the rGO (002) reflection, indicating partial photoreduction. FESEM and HRTEM analyses revealed uniform dispersion of MnO₂ nanoparticles (10–20 nm) anchored on wrinkled rGO sheets, with a lattice spacing of 0.309 nm corresponding to the (310) plane of α-MnO₂, evidencing strong interfacial coupling. FTIR spectra exhibited characteristic Mn–O and Mn–O–Mn vibrations at ∼460 and 587 cm⁻¹ , confirming robust oxide formation. Nitrogen adsorption–desorption measurements showed a type-IV isotherm with mesoporosity, delivering a high specific surface area of 194.8 m² g⁻¹ , a pore volume of 0.279 cm³ g⁻¹ , and an average pore radius of 1.55 nm. UV–visible spectroscopy revealed broad absorption with an indirect optical band gap of ∼1.71 eV, attributed to interfacial charge transfer and defect-mediated electronic states. Cytocompatibility studies using HEK-293 cells demonstrated high viability (>87 %) across 12.5–200 µg mL⁻¹ , confirming excellent material tolerance. This work highlights photon-induced synthesis as an energy-efficient and scalable route to engineer nanoscale MnO₂–graphene interfaces with controlled structure, porosity, and electronic properties, relevant for redox-active and surface-driven functional applications.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"11 ","pages":"Article 101645"},"PeriodicalIF":0.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146026224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-21DOI: 10.1016/j.nxmate.2026.101617
Meenakshi K.R. , Santhoskumar A.U. , K.S. Anantharaju , Vidya Y.S. , S. Meena , Arpita Paul Chowdhury
The present study was carried out to analyze the effect of a green reducing agent and a chemical fuel used in the synthesis of nanoparticles (NPs) on their magnetic, photoluminescence (PL), photocatalytic, and electrochemical behavior. Magnesium ferrite (MgFeO) NPs were synthesized via both chemical and green combustion route using glycine (MFG) as a fuel and (clove oil) as a reducing agent (MFCL). Both MFG and MFCL NPs exhibited a cubic spinel structure; however, compared to MFG, more planes are pronounced in MFCL NPs. A larger crystallite size was observed in MFCL rather compared to MFG NPs. Transmission electron microscopy analysis supported the Bragg reflections, while X-ray photoelectron spectroscopy confirmed the presence of Mg 1s, Fe 2p, O 1s and C 1s elements. From the Hysteresis loop, magnetic parameters such as saturation magnetization, retentivity, coercivity and squareness ratio were calculated. The PL emission spectra, CIE and CCT values clearly indicate that the sample could serve as a promising blue nanophosphor material for cool display technologies. Additionally, electrochemical and EIS spectral analysis were performed. The MFCL sample displayed a smaller semicircle diameter than MFG, indicating faster charge transfer at the electrode/electrolyte interface for the clove oil derived material. This result was consistent with the photoactivity of indigo dye, where the MFCL samples showed the highest photodegradation efficiency with 90.41% compared to MFG NPs.
本研究分析了绿色还原剂和化学燃料对纳米颗粒（NPs）合成的磁性、光致发光（PL）、光催化和电化学行为的影响。以甘氨酸（MFG）为燃料，丁香油（MFCL）为还原剂，通过化学燃烧和绿色燃烧两种途径合成了镁铁氧体（MgFe2O4） NPs。MFG和MFCL NPs均呈现立方尖晶石结构；然而，与MFG相比，MFCL NPs中发音的飞机更多。与MFG NPs相比，MFCL中观察到更大的晶体尺寸。透射电子显微镜分析支持布拉格反射，而x射线光电子能谱证实了Mg 1s， Fe 2p， O 1s和c1s元素的存在。根据磁滞回线计算了饱和磁化强度、固位率、矫顽力和方位比等磁性参数。发光光谱、CIE和CCT值清楚地表明，该样品可以作为一种有前途的蓝色纳米磷光材料用于冷显示技术。此外，还进行了电化学和EIS光谱分析。MFCL样品显示出比MFG更小的半圆直径，表明丁香油衍生材料在电极/电解质界面上的电荷转移更快。这一结果与靛蓝染料的光降解活性一致，其中MFCL样品的光降解效率最高，为90.41%。
{"title":"Role of glycine and Syzygiumaromaticum oil on structural, electrochemical, optical, magnetic and photocatalytic properties of MgFe2O4 nanoparticles","authors":"Meenakshi K.R. , Santhoskumar A.U. , K.S. Anantharaju , Vidya Y.S. , S. Meena , Arpita Paul Chowdhury","doi":"10.1016/j.nxmate.2026.101617","DOIUrl":"10.1016/j.nxmate.2026.101617","url":null,"abstract":"<div><div>The present study was carried out to analyze the effect of a green reducing agent and a chemical fuel used in the synthesis of nanoparticles (NPs) on their magnetic, photoluminescence (PL), photocatalytic, and electrochemical behavior. Magnesium ferrite (MgFe<span><math><mn>2</mn></math></span>O<span><math><mn>4</mn></math></span>) NPs were synthesized via both chemical and green combustion route using glycine (MFG) as a fuel and <span><math><mrow><mi>S</mi><mi>y</mi><mi>z</mi><mi>y</mi><mi>g</mi><mi>i</mi><mi>u</mi><mi>m</mi><mi>a</mi><mi>r</mi><mi>o</mi><mi>m</mi><mi>a</mi><mi>t</mi><mi>i</mi><mi>c</mi><mi>u</mi><mi>m</mi></mrow></math></span> (clove oil) as a reducing agent (MFCL). Both MFG and MFCL NPs exhibited a cubic spinel structure; however, compared to MFG, more planes are pronounced in MFCL NPs. A larger crystallite size was observed in MFCL rather compared to MFG NPs. Transmission electron microscopy analysis supported the Bragg reflections, while X-ray photoelectron spectroscopy confirmed the presence of Mg 1s, Fe 2p, O 1s and C 1s elements. From the Hysteresis loop, magnetic parameters such as saturation magnetization, retentivity, coercivity and squareness ratio were calculated. The PL emission spectra, CIE and CCT values clearly indicate that the sample could serve as a promising blue nanophosphor material for cool display technologies. Additionally, electrochemical and EIS spectral analysis were performed. The MFCL sample displayed a smaller semicircle diameter than MFG, indicating faster charge transfer at the electrode/electrolyte interface for the clove oil derived material. This result was consistent with the photoactivity of indigo dye, where the MFCL samples showed the highest photodegradation efficiency with 90.41% compared to MFG NPs.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"11 ","pages":"Article 101617"},"PeriodicalIF":0.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146026214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-24DOI: 10.1016/j.nxmate.2026.101655
Yasmeen Hamdan , Ahed H. Zyoud , Samar Al-Shakhshir , Shaher Zyoud , Ameed Amireh , Samer H. Zyoud , Tae Woo Kim
Pharmaceutical pollutants such as tetracycline (TC) pose serious environmental concerns because of their persistence and potential to promote antibiotic resistance. In this study, a ZnO/bentonite composite was developed and applied for the efficient removal of TC from aqueous solutions under simulated solar irradiation via a synergistic adsorption–photocatalysis mechanism. The bentonite component enhanced adsorption by drawing TC molecules closer to the ZnO active sites, where the reactive oxygen species (ROS) generated by ZnO facilitated degradation. SEM, XRD, FTIR, and UV–Vis characterization confirmed the composite’s structure and optical properties. Under optimal conditions (pH 8.5, 25 °C, 0.1 g/100 mL catalyst, 40 ppm TC), the system achieved 87 % removal, with complete mineralization validated by HPLC, total organic carbon (TOC), and Fourier transform infrared (FTIR) spectroscopy. The degradation followed pseudo-first-order kinetics with a rate constant of 0.015 min⁻¹ , and the point of zero charge (pHpzc = 9.4) influenced the pH-dependent performance. The catalyst retained 77 % of its initial efficiency after five cycles, highlighting its low cost, reusability, and eco-friendly potential for antibiotic-contaminated wastewater treatment.
{"title":"The ZnO/Bentonite composite for sustainable tetracycline removal from water: Adsorption and photocatalysis for effective wastewater treatment","authors":"Yasmeen Hamdan , Ahed H. Zyoud , Samar Al-Shakhshir , Shaher Zyoud , Ameed Amireh , Samer H. Zyoud , Tae Woo Kim","doi":"10.1016/j.nxmate.2026.101655","DOIUrl":"10.1016/j.nxmate.2026.101655","url":null,"abstract":"<div><div>Pharmaceutical pollutants such as tetracycline (TC) pose serious environmental concerns because of their persistence and potential to promote antibiotic resistance. In this study, a ZnO/bentonite composite was developed and applied for the efficient removal of TC from aqueous solutions under simulated solar irradiation via a synergistic adsorption–photocatalysis mechanism. The bentonite component enhanced adsorption by drawing TC molecules closer to the ZnO active sites, where the reactive oxygen species (ROS) generated by ZnO facilitated degradation. SEM, XRD, FTIR, and UV–Vis characterization confirmed the composite’s structure and optical properties. Under optimal conditions (pH 8.5, 25 °C, 0.1 g/100 mL catalyst, 40 ppm TC), the system achieved 87 % removal, with complete mineralization validated by HPLC, total organic carbon (TOC), and Fourier transform infrared (FTIR) spectroscopy. The degradation followed pseudo-first-order kinetics with a rate constant of 0.015 min⁻¹ , and the point of zero charge (pHpzc = 9.4) influenced the pH-dependent performance. The catalyst retained 77 % of its initial efficiency after five cycles, highlighting its low cost, reusability, and eco-friendly potential for antibiotic-contaminated wastewater treatment.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"11 ","pages":"Article 101655"},"PeriodicalIF":0.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146026313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-02-03DOI: 10.1016/j.nxmate.2026.101667
Farbod Nazemi , Mohammad Chamani , Gholam Hossein Farrahi
Shot peening is an efficient technique to improve the fatigue behaviour of metal components. In this study a hybrid approach, combining numerical and experimental is presented to investigate the influence of initial surface roughness on the distribution of residual stress in shot-peened components with particular attention to additively manufactured (AM) parts characterized by significant surface roughness (). A 3D Finite Element (FE) model incorporating real rough surface morphology and strain-rate sensitive material model with nonlinear kinematic/isotropic hardening was developed, and subsequently was validated with experimental data available. A comprehensive methodology was employed, beginning with the development of a finite element model to simulate single and multi-random shot impacts on smooth and artificially generated AM-representative rough surfaces, while including stochastic surface topographies commonly seen in AM processes. Results indicate that SP decreased the roughness on surfaces with a high initial average roughness, Ra = 35.4 μm, by 16.67 %. However, the average surface roughness on samples that had lower roughness originally experienced an increase by 18 %. The results showed that the high roughness decreases the maximum and depth of the compressive residual stresses induced by SP, in comparison with smooth sample. Additionally, Machine Learning (ML) algorithms, Artificial Neural Networks and Random Forest, were applied to predict RS distribution based on SP parameters and initial surface roughness topography. The ML models were trained using a large dataset of all applicable process variables, which gives a significant predictive framework for SP applications.
{"title":"Machine learning-based residual stress prediction in shot-peened components: Application to additively manufactured surfaces with stochastic roughness","authors":"Farbod Nazemi , Mohammad Chamani , Gholam Hossein Farrahi","doi":"10.1016/j.nxmate.2026.101667","DOIUrl":"10.1016/j.nxmate.2026.101667","url":null,"abstract":"<div><div>Shot peening is an efficient technique to improve the fatigue behaviour of metal components. In this study a hybrid approach, combining numerical and experimental is presented to investigate the influence of initial surface roughness on the distribution of residual stress in shot-peened components with particular attention to additively manufactured (AM) parts characterized by significant surface roughness (<span><math><mrow><msub><mrow><mi>R</mi></mrow><mrow><mi>a</mi></mrow></msub><mo>=</mo><mn>10</mn><mo>−</mo><mn>35</mn><mspace></mspace><mi>µm</mi></mrow></math></span>). A 3D Finite Element (FE) model incorporating real rough surface morphology and strain-rate sensitive material model with nonlinear kinematic/isotropic hardening was developed, and subsequently was validated with experimental data available. A comprehensive methodology was employed, beginning with the development of a finite element model to simulate single and multi-random shot impacts on smooth and artificially generated AM-representative rough surfaces, while including stochastic surface topographies commonly seen in AM processes. Results indicate that SP decreased the roughness on surfaces with a high initial average roughness, R<sub>a</sub> = 35.4 <em>μm</em>, by 16.67 %. However, the average surface roughness on samples that had lower roughness originally experienced an increase by 18 %. The results showed that the high roughness decreases the maximum and depth of the compressive residual stresses induced by SP, in comparison with smooth sample. Additionally, Machine Learning (ML) algorithms, Artificial Neural Networks and Random Forest, were applied to predict RS distribution based on SP parameters and initial surface roughness topography. The ML models were trained using a large dataset of all applicable process variables, which gives a significant predictive framework for SP applications.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"11 ","pages":"Article 101667"},"PeriodicalIF":0.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146173675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-14DOI: 10.1016/j.nxmate.2026.101605
M. Tkachev, E. Tkachev, A. Bodyakova, S. Mironov, R. Kaibyshev
This study examined the effect of friction stir processing (FSP) on the microstructure and properties of a novel Cu-Cr-Zr-Y alloy. In addition, the microstructural aspects of doping Cu-Cr-Zr bronze with yttrium were considered. It was found that owing to the extremely low solubility of yttrium in copper, this alloying element was primarily concentrated in a secondary phase. Owing to the low melting point of the Y-rich phase, it precipitated as coarse inclusions and thus exerted only a minor influence on the material behavior. In contrast, FSP was found to be quite feasible for the thermomechanical processing of the Cu-Cr-Zr-Y alloy. Specifically, a single FSP pass resulted in a more than three-fold increase in strength characteristics and simultaneously provided a substantial enhancement in electrical conductivity. This effect was attributed to the formation of an ultrafine-grained structure and the precipitation of Cr-rich dispersoids within the stir zone.
{"title":"Effect of friction-stir processing on microstructure and mechanical properties of Cu-Cr-Zr-Y alloy","authors":"M. Tkachev, E. Tkachev, A. Bodyakova, S. Mironov, R. Kaibyshev","doi":"10.1016/j.nxmate.2026.101605","DOIUrl":"10.1016/j.nxmate.2026.101605","url":null,"abstract":"<div><div>This study examined the effect of friction stir processing (FSP) on the microstructure and properties of a novel Cu-Cr-Zr-Y alloy. In addition, the microstructural aspects of doping Cu-Cr-Zr bronze with yttrium were considered. It was found that owing to the extremely low solubility of yttrium in copper, this alloying element was primarily concentrated in a secondary phase. Owing to the low melting point of the Y-rich phase, it precipitated as coarse inclusions and thus exerted only a minor influence on the material behavior. In contrast, FSP was found to be quite feasible for the thermomechanical processing of the Cu-Cr-Zr-Y alloy. Specifically, a single FSP pass resulted in a more than three-fold increase in strength characteristics and simultaneously provided a substantial enhancement in electrical conductivity. This effect was attributed to the formation of an ultrafine-grained structure and the precipitation of Cr-rich dispersoids within the stir zone.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"11 ","pages":"Article 101605"},"PeriodicalIF":0.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145980664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-16DOI: 10.1016/j.nxmate.2026.101615
P.U. Nzereogu , A.D. Omah , F.I. Ezema , E.I. Iwuoha , A.C. Nwanya
This research investigates the synthesis and characterization of silica extracted from rice husks sourced from Adani in Enugu State, Nigeria, and its application in lithium-ion batteries. In this work, two methodologies for extracting SiO2 from rice husk were explored: rice husk pre-treatment process (acid leaching) and rice husk post-treatment process (alkaline digestion). The rice husks underwent acid leaching with 10 % HCl, followed by calcination at temperatures ranging from 500°C to 800°C. The sample post-treatment involved alkaline digestion using a 1 N sodium hydroxide solution. Results from structural analysis showed a progressive increase in purity and amorphous properties of silica up to a calcination temperature of 700°C. At 800°C, crystalline forms of silica, such as cristobalite and tridymite, were observed. The post-treated samples, especially those calcined at 700°C (PT700), exhibited comparative higher purity. Electrochemical studies were carried out using Cyclic Voltammetry (CV), Galvanostatic Charge/Discharge (GCD) and Electrochemical Impedance Spectroscopy (EIS), and the results show that the post treated rice husk that was calcined at 700 °C (PT700) had the highest specific capacity of 913 mAh g⁻¹ at a current density of 100 mA g−1 and retained ∼89 % of this capacity after 1000 charge-discharge cycles. The energy density of the PT700 sample was 302 Wh kg⁻¹ , demonstrating its potential as a viable alternative to graphite in lithium-ion battery applications. The study concludes that silica extracted from rice husks is a sustainable and efficient material for use in energy storage devices, offering significant advantages in terms of reactivity, surface area, and electrochemical performance.
本研究研究了从尼日利亚埃努古州阿达尼稻壳中提取二氧化硅的合成和表征及其在锂离子电池中的应用。研究了从稻壳中提取SiO2的两种方法：稻壳预处理法（酸浸法）和稻壳后处理法（碱消化法）。稻壳用10 % HCl酸浸，然后在500 ~ 800℃的温度下煅烧。样品后处理包括使用1 N氢氧化钠溶液进行碱性消化。结构分析结果表明，在煅烧温度达到700℃时，二氧化硅的纯度和无定形性质逐渐增加。在800℃时，观察到硅的结晶形式，如方石英和钇石。处理后的样品，特别是在700°C （PT700）下煅烧的样品，具有相对较高的纯度。利用循环伏安法（CV）、恒流充放电法（GCD）和电化学阻抗谱法（EIS）对稻壳进行了电化学研究，结果表明，在700 °C （PT700）下，在100 mA g−1的电流密度下，稻壳的比容量最高为913 mAh g⁻¹ ，在1000次充放电循环后，其比容量仍保持在89 %。PT700样品的能量密度为302 Wh kg⁻¹ ，表明其作为锂离子电池中石墨的可行替代品的潜力。该研究得出结论，从稻壳中提取的二氧化硅是一种可持续且高效的材料，可用于储能设备，在反应性、表面积和电化学性能方面具有显着优势。
{"title":"Silica derived from rice husk waste as anode material for lithium-ion battery: A comprehensive study","authors":"P.U. Nzereogu , A.D. Omah , F.I. Ezema , E.I. Iwuoha , A.C. Nwanya","doi":"10.1016/j.nxmate.2026.101615","DOIUrl":"10.1016/j.nxmate.2026.101615","url":null,"abstract":"<div><div>This research investigates the synthesis and characterization of silica extracted from rice husks sourced from Adani in Enugu State, Nigeria, and its application in lithium-ion batteries. In this work, two methodologies for extracting SiO<sub>2</sub> from rice husk were explored: rice husk pre-treatment process (acid leaching) and rice husk post-treatment process (alkaline digestion). The rice husks underwent acid leaching with 10 % HCl, followed by calcination at temperatures ranging from 500°C to 800°C. The sample post-treatment involved alkaline digestion using a 1 N sodium hydroxide solution. Results from structural analysis showed a progressive increase in purity and amorphous properties of silica up to a calcination temperature of 700°C. At 800°C, crystalline forms of silica, such as cristobalite and tridymite, were observed. The post-treated samples, especially those calcined at 700°C (PT700), exhibited comparative higher purity. Electrochemical studies were carried out using Cyclic Voltammetry (CV), Galvanostatic Charge/Discharge (GCD) and Electrochemical Impedance Spectroscopy (EIS), and the results show that the post treated rice husk that was calcined at 700 °C (PT700) had the highest specific capacity of 913 mAh g⁻¹ at a current density of 100 mA g<sup>−1</sup> and retained ∼89 % of this capacity after 1000 charge-discharge cycles. The energy density of the PT700 sample was 302 Wh kg⁻¹ , demonstrating its potential as a viable alternative to graphite in lithium-ion battery applications. The study concludes that silica extracted from rice husks is a sustainable and efficient material for use in energy storage devices, offering significant advantages in terms of reactivity, surface area, and electrochemical performance.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"11 ","pages":"Article 101615"},"PeriodicalIF":0.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145980665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-13DOI: 10.1016/j.nxmate.2026.101603
Atti Srinivas, Sarat Chandra Babu Jakka
In this study, BCG (Biochar-based graphene) was functionalized with iron (Fe) and copper (Cu) to enhance its capacitive behaviour and physicochemical properties. The structural, morphological, and surface characteristics were systematically analyzed using XRD, Raman spectroscopy, XPS, SEM, and BET analysis. Electrochemical analysis showed that BCG-Fe (iron-doped biochar-based graphene) achieved a specific capacitance of 187.72 F/g, with an energy density of 6.52 Wh/kg and power density of 2608 W/kg. BCG-Cu (copper-doped biochar-based graphene) exhibited 157.14 F/g, 5.45 Wh/kg, and 1510 W/kg, respectively. The enhanced performance of BCG-Fe is attributed to improved conductivity and redox activity from Fe doping. These results highlight the promise of metal-modified BCG as a scalable, eco-friendly electrode material for energy storage.
{"title":"Sustainable high capacitance supercapacitor electrode from biomass-derived iron and copper-doped graphene structures","authors":"Atti Srinivas, Sarat Chandra Babu Jakka","doi":"10.1016/j.nxmate.2026.101603","DOIUrl":"10.1016/j.nxmate.2026.101603","url":null,"abstract":"<div><div>In this study, BCG (Biochar-based graphene) was functionalized with iron (Fe) and copper (Cu) to enhance its capacitive behaviour and physicochemical properties. The structural, morphological, and surface characteristics were systematically analyzed using XRD, Raman spectroscopy, XPS, SEM, and BET analysis. Electrochemical analysis showed that BCG-Fe (iron-doped biochar-based graphene) achieved a specific capacitance of 187.72 F/g, with an energy density of 6.52 Wh/kg and power density of 2608 W/kg. BCG-Cu (copper-doped biochar-based graphene) exhibited 157.14 F/g, 5.45 Wh/kg, and 1510 W/kg, respectively. The enhanced performance of BCG-Fe is attributed to improved conductivity and redox activity from Fe doping. These results highlight the promise of metal-modified BCG as a scalable, eco-friendly electrode material for energy storage.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"11 ","pages":"Article 101603"},"PeriodicalIF":0.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145980668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-04-01Epub Date: 2026-01-19DOI: 10.1016/j.nxmate.2026.101614
Yitao Chen, Frank Liou
Metal additive manufacturing has become a powerful tool to develop customized metal alloys and to discover more advanced properties for novel extended applications. Ti-Ni based shape memory alloy is a group of intriguing smart functional materials, and adding a small amount of a third element can promote and induce more attractive functions. Due to the difficulty in traditional processing and the unique feature of material flexibility of in-situ alloying in additive manufacturing processes, not only Ti-Ni binary shape memory alloys but also Ti-Ni-X ternary shape memory alloys can be developed, manufactured, and investigated in-depth by additive manufacturing. This paper provides a brief review of the development of Ti-Ni based ternary shape memory alloys using metal additive manufacturing. The research status regarding a variety of Ti-Ni-X ternary alloys was summarized based on the classification of the two most widely used metal additive manufacturing processes: directed energy deposition and powder bed fusion. The main manufacturing issues were discussed and suggested, and the recommended research directions were made for future development.
{"title":"Additive manufacturing of Ti-Ni based ternary shape memory alloys","authors":"Yitao Chen, Frank Liou","doi":"10.1016/j.nxmate.2026.101614","DOIUrl":"10.1016/j.nxmate.2026.101614","url":null,"abstract":"<div><div>Metal additive manufacturing has become a powerful tool to develop customized metal alloys and to discover more advanced properties for novel extended applications. Ti-Ni based shape memory alloy is a group of intriguing smart functional materials, and adding a small amount of a third element can promote and induce more attractive functions. Due to the difficulty in traditional processing and the unique feature of material flexibility of in-situ alloying in additive manufacturing processes, not only Ti-Ni binary shape memory alloys but also Ti-Ni-X ternary shape memory alloys can be developed, manufactured, and investigated in-depth by additive manufacturing. This paper provides a brief review of the development of Ti-Ni based ternary shape memory alloys using metal additive manufacturing. The research status regarding a variety of Ti-Ni-X ternary alloys was summarized based on the classification of the two most widely used metal additive manufacturing processes: directed energy deposition and powder bed fusion. The main manufacturing issues were discussed and suggested, and the recommended research directions were made for future development.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"11 ","pages":"Article 101614"},"PeriodicalIF":0.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146026314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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