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Ballistic and impact resistance performance of natural fiber-reinforced composites from biomass resources

Next Materials

Pub Date : 2025-03-01 DOI: 10.1016/j.nxmate.2025.100565

Olatunji Oladimeji Ojo , Mesach Olujoba Olaleke , Kenneth Kanayo Alaneme , Akintunde Olurotimi Dahunsi

Plant fibers are increasingly evolving as suitable natural substitutes to the synthetic and non-ecofriendly Kevlar, polyamide, and Dyneema fibers due to their availability and the drive towards maximum cost saving, sustainable manufacturing, and environmental friendliness. This set of fibers offers unique characteristics like comparatively low weight, high impact toughness, specific strength, and modulus. Considering the plethora of explored and unexplored plant fibers available in the world, extending the application frontiers of plant fibers to defense needs/ballistic impact resistance has remained an interesting and growing research area. This review provides a detailed appraisal of the ballistic impact performances of plant fiber-reinforced polymeric composites together with their multilayer armour systems available in the literature. It covers the ballistic impact phenomena of hard frontal and soft armour composites as well as the impact of composite properties such as thickness, stacking sequence, fiber distribution, and fiber volume percentage on the impact energy absorption and other ballistic properties of plant-fiber-reinforced composites. Insights on possible research prospects to advance the ballistic impact resistance of plant fiber-reinforced composites are also provided in this paper.

{"title":"Ballistic and impact resistance performance of natural fiber-reinforced composites from biomass resources","authors":"Olatunji Oladimeji Ojo , Mesach Olujoba Olaleke , Kenneth Kanayo Alaneme , Akintunde Olurotimi Dahunsi","doi":"10.1016/j.nxmate.2025.100565","DOIUrl":"10.1016/j.nxmate.2025.100565","url":null,"abstract":"<div><div>Plant fibers are increasingly evolving as suitable natural substitutes to the synthetic and non-ecofriendly Kevlar, polyamide, and Dyneema fibers due to their availability and the drive towards maximum cost saving, sustainable manufacturing, and environmental friendliness. This set of fibers offers unique characteristics like comparatively low weight, high impact toughness, specific strength, and modulus. Considering the plethora of explored and unexplored plant fibers available in the world, extending the application frontiers of plant fibers to defense needs/ballistic impact resistance has remained an interesting and growing research area. This review provides a detailed appraisal of the ballistic impact performances of plant fiber-reinforced polymeric composites together with their multilayer armour systems available in the literature. It covers the ballistic impact phenomena of hard frontal and soft armour composites as well as the impact of composite properties such as thickness, stacking sequence, fiber distribution, and fiber volume percentage on the impact energy absorption and other ballistic properties of plant-fiber-reinforced composites. Insights on possible research prospects to advance the ballistic impact resistance of plant fiber-reinforced composites are also provided in this paper.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100565"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent challenges and scope in tandem cells for unassisted overall water splitting

Next Materials

Pub Date : 2025-03-01 DOI: 10.1016/j.nxmate.2025.100560

Himanshi Goel , Riya Nagpal , Kumar Rakesh Ranjan , Vivek Mishra

Hydrogen is an efficient and cleaner source of energy and has potential to meet future energy demands. Hydrogen production by solar-driven unassisted water splitting methodology is a mandatory step to achieve this goal. Several strategic approaches are reported to improve efficiency by modifying the surface layers of the electrodes to enhance surface kinetics while some focused on improving stability of photo-electrodes in highly saline water medium and many have worked upon improving the catalyst reaction in the process of recombination of holes and electrons. Still challenges such as poor efficiency, low stability, small solar to hydrogen ratio, over-potential, rate of evolution and high cost are limiting the construction of PEC water splitting system. Herein, we briefly summarize the recent developments in solar to hydrogen conversion technology utilizing different mechanisms over the period including metal oxide, nitrides, monolithic configuration, photo-catalysts, electro-catalysts, surface modulation layers and low quantum yield.

引用次数: 0

Powder X-ray line diffraction pattern profiling of anatase-quartz binary oxide: A crystallographic investigation

Next Materials

Pub Date : 2025-03-01 DOI: 10.1016/j.nxmate.2025.100571

Allah Rakha Aidid , Md. Khalid Hossain Shishir , Md. Ashikur Rahaman , Md. Tarikul Islam , Mubashira Mukta , Md. Ashraful Alam

High-crystalline binary oxide of TiO₂ and SiO₂ was successfully synthesized using a simple, unique method involving titanium isopropoxide, silicon tetraethoxide and isopropyl alcohol (IP). The resulting crystalline preferred oriented powder was analyzed using X-ray diffraction (XRD). Rietveld refinement showed that the titania-silica (TS) crystalline binary oxide consisted of anatase and quartz phases with a composition of 49.40 % crystalline anatase and 50.60 % crystalline quartz. The pure titania-silica binary oxide (TSBO) had detailed lattice parameters: for anatase, α=β=γ=90.0°, a=b=3.7856 Å, c=9.5159 Å, lattice strain of 0.079 %, lattice volume of 136.372 Å³ and specific surface area of 20.0 m²/g with tetragonal crystal structure. For quartz, the parameters were α= β=90.0°, γ=120.0°, a=b=4.9143 Å, c=5.4059 Å, lattice strain of 0.012 %, lattice volume of 113.063 Å³ and specific surface area of 12.5 m²/g with hexagonal crystal structure. The most intense diffractions were associated with the (101) plane at 2θ=25.289° for anatase and the (101) plane at 2θ=26.634° for quartz. The synthesized material exhibited peak in UV absorbance at 324.50 nm (0.783 a.u.) caused blue shift explored nano-size contribution and optical band gap of 3.071 eV. The zeta potential for +55.33 to −65.93 mV showed good stability of TSBO. The crystallographic data verified the successful synthesis of pure TSBO contributing to advancements in nanotechnology.

{"title":"Powder X-ray line diffraction pattern profiling of anatase-quartz binary oxide: A crystallographic investigation","authors":"Allah Rakha Aidid , Md. Khalid Hossain Shishir , Md. Ashikur Rahaman , Md. Tarikul Islam , Mubashira Mukta , Md. Ashraful Alam","doi":"10.1016/j.nxmate.2025.100571","DOIUrl":"10.1016/j.nxmate.2025.100571","url":null,"abstract":"<div><div>High-crystalline binary oxide of TiO<sub>2</sub> and SiO<sub>2</sub> was successfully synthesized using a simple, unique method involving titanium isopropoxide, silicon tetraethoxide and isopropyl alcohol (IP). The resulting crystalline preferred oriented powder was analyzed using X-ray diffraction (XRD). Rietveld refinement showed that the titania-silica (TS) crystalline binary oxide consisted of anatase and quartz phases with a composition of 49.40 % crystalline anatase and 50.60 % crystalline quartz. The pure titania-silica binary oxide (TSBO) had detailed lattice parameters: for anatase, α=β=γ=90.0°, a=b=3.7856 Å, c=9.5159 Å, lattice strain of 0.079 %, lattice volume of 136.372 Å³ and specific surface area of 20.0 m²/g with tetragonal crystal structure. For quartz, the parameters were α= β=90.0°, γ=120.0°, a=b=4.9143 Å, c=5.4059 Å, lattice strain of 0.012 %, lattice volume of 113.063 Å³ and specific surface area of 12.5 m²/g with hexagonal crystal structure. The most intense diffractions were associated with the (101) plane at 2θ=25.289° for anatase and the (101) plane at 2θ=26.634° for quartz. The synthesized material exhibited peak in UV absorbance at 324.50 nm (0.783 a.u.) caused blue shift explored nano-size contribution and optical band gap of 3.071 eV. The zeta potential for +55.33 to −65.93 mV showed good stability of TSBO. The crystallographic data verified the successful synthesis of pure TSBO contributing to advancements in nanotechnology.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100571"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Alkali-treatment of Lupine peels for valorizing adsorption of organic cationic pollutants from wastewater: Kinetics, isotherm, thermodynamic, regeneration, and mechanism

Next Materials

Pub Date : 2025-03-01 DOI: 10.1016/j.nxmate.2025.100568

Nour W. Sabry, Ibrahim Naeem, Seed A. Hassanien, Osama Abuzalat, Ahmad Baraka

Vegetable and fruit peels are gaining attention as economical and effective adsorbents for organic pollutants. This study highlights the potential of alkaline-treated Yellow Lupine Peels Powder (T-YLPP) as a biomaterial for removing cationic methylene blue (MB) from wastewater through adsorption. Characterization of untreated (YLPP) and NaOH-treated (T-YLPP) samples using FTIR, BET, SEM/EDX, and XPS revealed that alkaline treatment enhances functional group exposure, increases active sites, boosts surface area from 376.23 to 427.49 m²/g, and enlarges pore volume and size. Kinetic, isotherm, thermodynamic, and regeneration studies confirmed that MB adsorption by both samples is spontaneous, exothermic, and dominated by physical interactions, with pore diffusion controlling the process. The adsorption capacity of T-YLPP increased significantly from 3.99 mg/g (YLPP) to 46.51 mg/g. Effective regeneration was achieved through acid treatment combined with heating. The adsorption mechanism likely involves dipole-dipole interactions, hydrogen bonding, and cation exchange, making T-YLPP a promising candidate for wastewater treatment.

{"title":"Alkali-treatment of Lupine peels for valorizing adsorption of organic cationic pollutants from wastewater: Kinetics, isotherm, thermodynamic, regeneration, and mechanism","authors":"Nour W. Sabry, Ibrahim Naeem, Seed A. Hassanien, Osama Abuzalat, Ahmad Baraka","doi":"10.1016/j.nxmate.2025.100568","DOIUrl":"10.1016/j.nxmate.2025.100568","url":null,"abstract":"<div><div>Vegetable and fruit peels are gaining attention as economical and effective adsorbents for organic pollutants. This study highlights the potential of alkaline-treated Yellow Lupine Peels Powder (T-YLPP) as a biomaterial for removing cationic methylene blue (MB) from wastewater through adsorption. Characterization of untreated (YLPP) and NaOH-treated (T-YLPP) samples using FTIR, BET, SEM/EDX, and XPS revealed that alkaline treatment enhances functional group exposure, increases active sites, boosts surface area from 376.23 to 427.49 m²/g, and enlarges pore volume and size. Kinetic, isotherm, thermodynamic, and regeneration studies confirmed that MB adsorption by both samples is spontaneous, exothermic, and dominated by physical interactions, with pore diffusion controlling the process. The adsorption capacity of T-YLPP increased significantly from 3.99 mg/g (YLPP) to 46.51 mg/g. Effective regeneration was achieved through acid treatment combined with heating. The adsorption mechanism likely involves dipole-dipole interactions, hydrogen bonding, and cation exchange, making T-YLPP a promising candidate for wastewater treatment.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100568"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of artificial intelligence-discovered patterns and expert-designed aging patterns for 0.2 % proof stress in Ni-Al alloys with γ – γ' two-phase structure

Next Materials

Pub Date : 2025-02-28 DOI: 10.1016/j.nxmate.2025.100564

Vickey Nandal , Sae Dieb , Dmitry S. Bulgarevich , Toshio Osada , Toshiyuki Koyama , Satoshi Minamoto , Masahiko Demura

This study presents the comprehensive analysis of flexible non-isothermal aging (NIA) patterns discovered through artificial intelligence (AI) to improve the mechanical strength (0.2 % proof stress) in γ – γ' two-phase, binary Ni-Al alloys. In our recent investigation, we found that the AI algorithm could propose aging patterns with superior strength compared to conventional isothermal aging heat treatment. In this current study, we continued our extensive exploration of AI methodologies, uncovering diverse patterns that also surpassed the isothermal aging benchmark. Remarkably, out of 2823 NIA schedules, we found 173 ones outperforming the isothermal aging benchmark. Furthermore, we conducted a detailed analysis of newly AI-discovered patterns and expert-designed patterns inspired by AI. We identified two critical factors for strength improvement: exposure at 700 ℃ and the number of consecutive 700 ℃ exposures (optimally set at two), alongside non-consecutive steps (up to five). The insights gained from these findings may demonstrate the potential of AI-driven approaches to yield ideas on how to achieve improved strength in Ni-Al alloys.

{"title":"Analysis of artificial intelligence-discovered patterns and expert-designed aging patterns for 0.2 % proof stress in Ni-Al alloys with γ – γ' two-phase structure","authors":"Vickey Nandal , Sae Dieb , Dmitry S. Bulgarevich , Toshio Osada , Toshiyuki Koyama , Satoshi Minamoto , Masahiko Demura","doi":"10.1016/j.nxmate.2025.100564","DOIUrl":"10.1016/j.nxmate.2025.100564","url":null,"abstract":"<div><div>This study presents the comprehensive analysis of flexible non-isothermal aging (NIA) patterns discovered through artificial intelligence (AI) to improve the mechanical strength (0.2 % proof stress) in γ – γ' two-phase, binary Ni-Al alloys. In our recent investigation, we found that the AI algorithm could propose aging patterns with superior strength compared to conventional isothermal aging heat treatment. In this current study, we continued our extensive exploration of AI methodologies, uncovering diverse patterns that also surpassed the isothermal aging benchmark. Remarkably, out of 2823 NIA schedules, we found 173 ones outperforming the isothermal aging benchmark. Furthermore, we conducted a detailed analysis of newly AI-discovered patterns and expert-designed patterns inspired by AI. We identified two critical factors for strength improvement: exposure at 700 ℃ and the number of consecutive 700 ℃ exposures (optimally set at two), alongside non-consecutive steps (up to five). The insights gained from these findings may demonstrate the potential of AI-driven approaches to yield ideas on how to achieve improved strength in Ni-Al alloys.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100564"},"PeriodicalIF":0.0,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluating the photocatalytic efficiency of polypyrrole-enhanced Bi₂WO₆/g-C₃N₅ nanocomposites for effective organic pollutant degradation

Next Materials

Pub Date : 2025-02-28 DOI: 10.1016/j.nxmate.2025.100557

K.S Pushpa Valli , A. Antony Christian Raja , V. Selvam , S. Mary Jelastin Kala , A.S.I Joy Sinthiya , B. Malathi

The effective development of an advanced Z-scheme photocatalytic system, denoted as g-C₃N₅@/Bi₂WO₆/Ppy, was achieved by incorporating graphitic carbon nitride and Bi₂WO₆ nanoparticles, which were reinforced with polypyrrole (PPy). In the Z-scheme system, PPy functions as an Ohmic contact as a conductive polymer, thereby enabling the transfer of charge between g-C₃N₅ and Bi₂WO₆. The XRD confirms the crystalline nature of the Bi₂WO₆ and photocatalyst. The bandgap of the photocatalyst was enhanced, as determined through UV-DRS. BET studies confirms that adding pyrrole to g-C₃N₅@/Bi₂WO₆ significantly increases the surface area of the photocatalyst. Specifically, the 1:10 g-C₃N₅@/Bi₂WO₆ with PPy composition demonstrated exceptional photocatalytic activity, destroying over 96 % of Rhodamine B (RhB) and 98 % of Methylene Blue (MB) in 60 minutes under visible light. The primary species involved in the photocatalytic process are superoxide radicals (O₂•−) and holes (h⁺), according to photoelectrochemical tests and scavenging experiments. In recycling photocatalytic studies, the photocatalysts showed outstanding stability.

{"title":"Evaluating the photocatalytic efficiency of polypyrrole-enhanced Bi₂WO₆/g-C₃N₅ nanocomposites for effective organic pollutant degradation","authors":"K.S Pushpa Valli , A. Antony Christian Raja , V. Selvam , S. Mary Jelastin Kala , A.S.I Joy Sinthiya , B. Malathi","doi":"10.1016/j.nxmate.2025.100557","DOIUrl":"10.1016/j.nxmate.2025.100557","url":null,"abstract":"<div><div>The effective development of an advanced Z-scheme photocatalytic system, denoted as g-C<sub>3</sub>N<sub>5</sub>@/Bi<sub>2</sub>WO<sub>6</sub>/Ppy, was achieved by incorporating graphitic carbon nitride and Bi<sub>2</sub>WO<sub>6</sub> nanoparticles, which were reinforced with polypyrrole (PPy). In the Z-scheme system, PPy functions as an Ohmic contact as a conductive polymer, thereby enabling the transfer of charge between g-C<sub>3</sub>N<sub>5</sub> and Bi<sub>2</sub>WO<sub>6</sub>. The XRD confirms the crystalline nature of the Bi<sub>2</sub>WO<sub>6</sub> and photocatalyst. The bandgap of the photocatalyst was enhanced, as determined through UV-DRS. BET studies confirms that adding pyrrole to g-C<sub>3</sub>N<sub>5</sub>@/Bi<sub>2</sub>WO<sub>6</sub> significantly increases the surface area of the photocatalyst. Specifically, the 1:10 g-C<sub>3</sub>N<sub>5</sub>@/Bi<sub>2</sub>WO<sub>6</sub> with PPy composition demonstrated exceptional photocatalytic activity, destroying over 96 % of Rhodamine B (RhB) and 98 % of Methylene Blue (MB) in 60 minutes under visible light. The primary species involved in the photocatalytic process are superoxide radicals (O<sub>2</sub>•−) and holes (h<sup>+</sup>), according to photoelectrochemical tests and scavenging experiments. In recycling photocatalytic studies, the photocatalysts showed outstanding stability.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100557"},"PeriodicalIF":0.0,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Facile fabrication of a Z-scheme PVA/gelatin based CeO2/g-C3N4 heterojunction aerogel for enhanced visible light mediated photocatalytic degradation of psychoactive drug in aqueous phase

Next Materials

Pub Date : 2025-02-28 DOI: 10.1016/j.nxmate.2025.100533

Debanjali Dey , Shamik Chowdhury , Ramkrishna Sen

With rapid industrialization and escalating urbanism, the accumulation of pharmaceutically active substances and their toxic byproducts have become a global environmental burden. To address this concern, herein, a self-supporting porous PVA/gelatin-based cerium dioxide (CeO₂)/graphitic carbon nitride (g-C₃N₄) (pg-CCN) aerogel photocatalyst is synthesized through a facile two-step approach. The resulting lightweight aerogel is systematically evaluated for its ability to degrade caffeine (CAF), a psychoactive drug through visible light-mediated photocatalysis. The optimised pg-CCN aerogel manifests outstanding photocatalytic degradation efficiency of 95.8 % towards CAF within 180 min of visible light irradiation. This is apparently due to the heterostructure offering increased specific surface area, interconnected porous network, moderate band gap, fast interfacial charge transfer kinetics, and lowered recombination rate of photogenerated charge carriers. The latter is also because of a direct Z-scheme mechanism of action of the as-synthesized pg-CCN heterojunction. For a more comprehensive assessment of the photocatalytic efficiency of pg-CCN aerogel from a practical standpoint, investigations were conducted on the removal of other coexisting pharmaceuticals from complex multicomponent systems in various real water matrices. Further, these self-supporting aerogels not only exhibit high reusability with easy retrieval but also do not undergo any structural deformation on repeated usage. The findings of this work proffer valuable insights into the development of extremely efficacious Z-scheme heterojunction photocatalysts for the degradation of refractory pollutants.

{"title":"Facile fabrication of a Z-scheme PVA/gelatin based CeO2/g-C3N4 heterojunction aerogel for enhanced visible light mediated photocatalytic degradation of psychoactive drug in aqueous phase","authors":"Debanjali Dey , Shamik Chowdhury , Ramkrishna Sen","doi":"10.1016/j.nxmate.2025.100533","DOIUrl":"10.1016/j.nxmate.2025.100533","url":null,"abstract":"<div><div>With rapid industrialization and escalating urbanism, the accumulation of pharmaceutically active substances and their toxic byproducts have become a global environmental burden. To address this concern, herein, a self-supporting porous PVA/gelatin-based cerium dioxide (CeO<sub>2</sub>)/graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) (pg-CCN) aerogel photocatalyst is synthesized through a facile two-step approach. The resulting lightweight aerogel is systematically evaluated for its ability to degrade caffeine (CAF), a psychoactive drug through visible light-mediated photocatalysis. The optimised pg-CCN aerogel manifests outstanding photocatalytic degradation efficiency of 95.8 % towards CAF within 180 min of visible light irradiation. This is apparently due to the heterostructure offering increased specific surface area, interconnected porous network, moderate band gap, fast interfacial charge transfer kinetics, and lowered recombination rate of photogenerated charge carriers. The latter is also because of a direct Z-scheme mechanism of action of the as-synthesized pg-CCN heterojunction. For a more comprehensive assessment of the photocatalytic efficiency of pg-CCN aerogel from a practical standpoint, investigations were conducted on the removal of other coexisting pharmaceuticals from complex multicomponent systems in various real water matrices. Further, these self-supporting aerogels not only exhibit high reusability with easy retrieval but also do not undergo any structural deformation on repeated usage. The findings of this work proffer valuable insights into the development of extremely efficacious Z-scheme heterojunction photocatalysts for the degradation of refractory pollutants.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100533"},"PeriodicalIF":0.0,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Direct chemical vapor deposition of CoO on Ni-foam for supercapacitor electrode applications

Next Materials

Pub Date : 2025-02-28 DOI: 10.1016/j.nxmate.2025.100570

Joseph Anthony Duncan Jr., Farhan Azim, Alisha Dhakal, Himal Pokhrel, Sanjay R. Mishra, Shawn David Pollard

Low-pressure chemical vapor deposition was used to grow cobalt oxide (CoO) directly on nickel foam using a Cobalt Chloride (CoCl₂·6H₂O) precursor. The resultant coating was evaluated with scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy, which revealed a disordered surface with significant growth of CoO throughout the three-dimensional porous structure. The electrochemical performance of the resultant structure was subsequently evaluated using electrochemical impedance spectroscopy (EIS), galvanostatic charge-discharge (GCD), and cyclic voltammetry, showing a maximum specific capacitance of 1.10 F/cm² in a 1.0 M KOH aqueous solution at a 10 mV/s scan rate, significantly higher than that obtained for a control nickel foam electrode sample. Low charge transfer and solution resistances observed from EIS analysis suggested the influence of fast redox reactions at the CoO-coated Ni foam electrode-KOH electrolyte interface. The extended discharge times obtained from GCD measurements at low current densities demonstrate improved capacitive efficiency of the Ni-CoO electrode, thus making it a potential candidate in the field of energy storage application.

{"title":"Direct chemical vapor deposition of CoO on Ni-foam for supercapacitor electrode applications","authors":"Joseph Anthony Duncan Jr., Farhan Azim, Alisha Dhakal, Himal Pokhrel, Sanjay R. Mishra, Shawn David Pollard","doi":"10.1016/j.nxmate.2025.100570","DOIUrl":"10.1016/j.nxmate.2025.100570","url":null,"abstract":"<div><div>Low-pressure chemical vapor deposition was used to grow cobalt oxide (CoO) directly on nickel foam using a Cobalt Chloride (CoCl<sub>2</sub>·6H<sub>2</sub>O) precursor. The resultant coating was evaluated with scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy, which revealed a disordered surface with significant growth of CoO throughout the three-dimensional porous structure. The electrochemical performance of the resultant structure was subsequently evaluated using electrochemical impedance spectroscopy (EIS), galvanostatic charge-discharge (GCD), and cyclic voltammetry, showing a maximum specific capacitance of 1.10 F/cm<sup>2</sup> in a 1.0 M KOH aqueous solution at a 10 mV/s scan rate, significantly higher than that obtained for a control nickel foam electrode sample. Low charge transfer and solution resistances observed from EIS analysis suggested the influence of fast redox reactions at the CoO-coated Ni foam electrode-KOH electrolyte interface. The extended discharge times obtained from GCD measurements at low current densities demonstrate improved capacitive efficiency of the Ni-CoO electrode, thus making it a potential candidate in the field of energy storage application.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100570"},"PeriodicalIF":0.0,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interactive chirality transfer between chiral phosphor and achiral polyacetylene for constructing multi-color circularly polarized room temperature phosphorescence 手性荧光粉和非手性聚乙炔之间的交互手性转移用于构建多色圆偏振室温磷光体

Next Materials

Pub Date : 2025-02-26 DOI: 10.1016/j.nxmate.2025.100558

Kai Yang , Xinhui Gao , Xujie Wang , Biao Zhao , Youping Wu , Jianping Deng

Circularly polarized room temperature phosphorescence (CPRTP) attracts great attention, while it is still challenging for constructing CPRTP with large luminescence dissymmetry factor (g_lum). The present work establishes an interactive chirality transfer (ICT) strategy to modulate multi-color CPRTP, in which chiral phosphors work as chiral source and RTP emitter and achiral polyacetylene (PY) works as chirality transmitter. Chiral phosphors (S/R-PEA-DDT possessing blue RTP and S/R-PEA-NA possessing orange RTP, with lifetimes of 606 μs and 365 μs, respectively) without CPRTP are synthesized. As blending the phosphor with achiral PY, the chiral phosphor achieves helical chirality by ICT. In the process, chiral phosphor induces achiral PY forming chiral helical structure; furtherly, the induced helical structure subsequently induces the reverse helical arrangement of the chiral phosphor along with the helical structure. Hereto, the chiral phosphor achieves intrinsic CPRTP emission with maximum g_lum of 0.11. Benefited from the rigid helical structure of PY, the lifetimes of S/R-PEA-DDT and S/R-PEA-NA are increased by 4 % and 43 %, respectively. Furtherly, red CPRTP can be obtained via circularly polarized phosphorescence energy transfer (CPP-ET) by using the phosphors as the donor, with g_lum arriving at 10⁻². Multi-channel chiroptical integrated logic system and multi-dimension anti-counterfeiting are developed by leveraging the CPRTP of the films. The present work offers more insights into chirality transfer between the chiral-luminescent molecule and helical polymers, and establishes a universal platform for constructing CPRTP materials with large g_lum.

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引用次数: 0

Self-standing films of medical grade PLA/PEG copolymers for guided bone regeneration

Next Materials

Pub Date : 2025-02-26 DOI: 10.1016/j.nxmate.2025.100561

Ricardo Rojas , Juan P. Zanín , Rocío Martínez , German A. Gil

Both resorbable and non-resorbable membranes are intensely investigated as barriers materials for guided bone regeneration (GBR) due to their biodegradability and biocompatibility. To optimize their performance in bone regeneration, the chemical, physical, and biological properties of these membranes must be precisely engineered, balancing mechanical strength and controlled degradation. In this study, self-standing films for GBR applications were developed from medical-grade PLA/polyethylene glycol (PEG) copolymers. The films were prepared by spin coating of copolymer inks that included dichloromethane as a solvent, and hydroxyapatite (HA) and polyethylene glycol (PEG) chains as additives. The resulting films exhibited a thickness of 120–150 μm, a disordered arrangement of the copolymer chains, and initial poor toughness. The incorporation of PEG increased the toughness and hydrophilicity of the films and accelerated their degradation while HA improved their bioactivity but compromised their mechanical properties. The combination of HA and PEG produced films with a favorable balance between mechanical integrity and bioactivity. Cytocompatibility was confirmed with MC3T3-E1 pre-osteoblastic cells, supporting the potential of these films for GBR applications. Osteogenic differentiation was reduced in films lacking HA, whereas HA substantially improved osteogenesis by serving as adhesion nodes for differentiated cells.

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引用次数: 0

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