Pub Date : 2025-03-03DOI: 10.1016/j.diamond.2025.112168
A.A. Tyutrin , A.L. Rakevich , E.F. Martynovich
The effect of sodium borohydride (NaBH4) on the luminescent properties of glucose-based carbon dots synthesized by the plasma method is investigated. The spectral and kinetic properties of the carbon dots were studied using a MicroTime 200 confocal scanning fluorescence microscope. The lower concentration limit of NaBH4 was established at which there is an enhancement of the CDs luminescence intensity. It was found that adding of sodium borohydride to the CDs solution at concentration below 2.5 mg/mL leads to an increase in the luminescence intensity, while a decrease in intensity is noted at concentrations above 2.5 mg/mL. Enhancement of the luminescence intensity by 2.8 times was detected for the sample with the mass fraction of NaBH4 was 0.04 % in the solution. Using the time-correlated photon counting method, it was shown that the luminescence decay kinetics is described by a tri-exponential function. It has been experimentally demonstrated that the fast luminescence time component is related to the carbonyl functional group on the carbon dots surface.
{"title":"Microplasma-assisted synthesis and regulation the luminescence performance of glucose-based carbon dots by sodium borohydride","authors":"A.A. Tyutrin , A.L. Rakevich , E.F. Martynovich","doi":"10.1016/j.diamond.2025.112168","DOIUrl":"10.1016/j.diamond.2025.112168","url":null,"abstract":"<div><div>The effect of sodium borohydride (NaBH<sub>4</sub>) on the luminescent properties of glucose-based carbon dots synthesized by the plasma method is investigated. The spectral and kinetic properties of the carbon dots were studied using a MicroTime 200 confocal scanning fluorescence microscope. The lower concentration limit of NaBH<sub>4</sub> was established at which there is an enhancement of the CDs luminescence intensity. It was found that adding of sodium borohydride to the CDs solution at concentration below 2.5 mg/mL leads to an increase in the luminescence intensity, while a decrease in intensity is noted at concentrations above 2.5 mg/mL. Enhancement of the luminescence intensity by 2.8 times was detected for the sample with the mass fraction of NaBH<sub>4</sub> was 0.04 % in the solution. Using the time-correlated photon counting method, it was shown that the luminescence decay kinetics is described by a tri-exponential function. It has been experimentally demonstrated that the fast luminescence time component is related to the carbonyl functional group on the carbon dots surface.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112168"},"PeriodicalIF":4.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551991","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}
Pub Date : 2025-03-03DOI: 10.1016/j.diamond.2025.112166
Khushboo Kumari , Sonu Rani , Pankaj Kumar , Vishal Tiwari , Sanjay R. Dhakate , Saroj Kumari
Framing high-performance carbon fiber (HPCF) requires mesophase pitch (MP) having an adequate amount of anisotropic content with excellent orientation and melt flow structure. Typically, MP formation requires high temperature to generate free radicals, which has prompted the quest for low-energy consumption approaches. This study disclosed a simple and cost-effective method for synthesizing highly spinnable MP via co‑carbonization of coal tar pitch (CTP) with polycarbonate (PC). Initially, PC (0–25 wt%) was melded into CTP to prepare various isotropic pitches (IP), which were further transformed into MPs by treating at 400 °C for 4 h. After analysis, 15 wt% PC appeared efficacious for anisotropy generation and to achieve MP with requisite properties for HPCF, conditions were further optimized (400–410 °C for 4–6 h). To ascertain the suitability, MP-15-405-5 exhibiting superior characteristics was transformed into pitch fibers, stabilized, and subsequently carbonized at 1000 °C to produce carbon fibers (CF). The resulting CF exhibited excellent mechanical properties with tensile strength and tensile modulus of 1.41 GPa and 156.25 GPa, respectively. The study suggests that PC acts as a dominant module in manufacturing high-quality spinnable MP and improves the yield of anisotropic content at relatively lower experimental conditions, making the process more efficient and cost-effective.
{"title":"Effect of polycarbonate for preparation of mesophase pitch via co‑carbonization and their resulting high-performance carbon fibers","authors":"Khushboo Kumari , Sonu Rani , Pankaj Kumar , Vishal Tiwari , Sanjay R. Dhakate , Saroj Kumari","doi":"10.1016/j.diamond.2025.112166","DOIUrl":"10.1016/j.diamond.2025.112166","url":null,"abstract":"<div><div>Framing high-performance carbon fiber (HPCF) requires mesophase pitch (MP) having an adequate amount of anisotropic content with excellent orientation and melt flow structure. Typically, MP formation requires high temperature to generate free radicals, which has prompted the quest for low-energy consumption approaches. This study disclosed a simple and cost-effective method for synthesizing highly spinnable MP via co‑carbonization of coal tar pitch (CTP) with polycarbonate (PC). Initially, PC (0–25 wt%) was melded into CTP to prepare various isotropic pitches (IP), which were further transformed into MPs by treating at 400 °C for 4 h. After analysis, 15 wt% PC appeared efficacious for anisotropy generation and to achieve MP with requisite properties for HPCF, conditions were further optimized (400–410 °C for 4–6 h). To ascertain the suitability, MP-15-405-5 exhibiting superior characteristics was transformed into pitch fibers, stabilized, and subsequently carbonized at 1000 °C to produce carbon fibers (CF). The resulting CF exhibited excellent mechanical properties with tensile strength and tensile modulus of 1.41 GPa and 156.25 GPa, respectively. The study suggests that PC acts as a dominant module in manufacturing high-quality spinnable MP and improves the yield of anisotropic content at relatively lower experimental conditions, making the process more efficient and cost-effective.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112166"},"PeriodicalIF":4.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563356","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}
Pub Date : 2025-03-03DOI: 10.1016/j.diamond.2025.112171
Wael A. Mahdi , Adel Alhowyan , Ahmad J. Obaidullah
This study investigates the adsorption of folic acid (FA) onto pristine and oxygen-terminated boron nitride (BN) and silicon carbide (SiC) nanoparticles using density functional theory (DFT) and molecular dynamics (MD) simulations. Employing the Perdew-Burke-Ernzerhof functional with the D3 dispersion correction (PBED3) within a water solvent environment, we determined that FA adsorption is energetically favorable on both nitrogen-terminated BN (−0.92 eV) and oxygen-terminated SiC (−0.99 eV). This binding is driven by electrostatic interactions between the -NH and -OH groups of FA and the nitrogen and carbon atoms of the nanoparticles. Oxygen termination marginally enhanced the binding energy in both nanoparticle types. Thermodynamic analysis confirmed the adsorption process to be exothermic and spontaneous. MD simulations further revealed a hierarchy in FA interaction strength with BN nanoparticles: O > N > B, with O-terminated BN exhibiting the strongest interaction. This stronger interaction correlated with reduced FA mobility, indicating tight binding. Conversely, weaker interactions, particularly with boron-terminated BN, resulted in increased FA diffusion and higher mean square displacement (MSD). The adsorption of FA significantly altered the electronic and optical properties of both BN and SiC nanoparticles, with a termination-dependent effect. Specifically, FA adsorption substantially reduced the HOMO-LUMO gap, most notably in boron-terminated BN (76.83 % reduction) compared to oxygen-terminated SiC (72.94 % reduction), leading to increased conductivity. This enhanced conductivity, coupled with the low recovery times and improved dipole moments observed, suggests the potential utility of BN and SiC nanoparticles as biosensors for FA detection. The promising adsorption energies also highlight their potential application in drug delivery systems.
{"title":"Folic acid adsorption on pristine and oxygen-terminated boron nitride and silicon carbide nanoparticles: A DFT and MD simulation study","authors":"Wael A. Mahdi , Adel Alhowyan , Ahmad J. Obaidullah","doi":"10.1016/j.diamond.2025.112171","DOIUrl":"10.1016/j.diamond.2025.112171","url":null,"abstract":"<div><div>This study investigates the adsorption of folic acid (FA) onto pristine and oxygen-terminated boron nitride (BN) and silicon carbide (SiC) nanoparticles using density functional theory (DFT) and molecular dynamics (MD) simulations. Employing the Perdew-Burke-Ernzerhof functional with the D3 dispersion correction (PBE<img>D3) within a water solvent environment, we determined that FA adsorption is energetically favorable on both nitrogen-terminated BN (−0.92 eV) and oxygen-terminated SiC (−0.99 eV). This binding is driven by electrostatic interactions between the -NH and -OH groups of FA and the nitrogen and carbon atoms of the nanoparticles. Oxygen termination marginally enhanced the binding energy in both nanoparticle types. Thermodynamic analysis confirmed the adsorption process to be exothermic and spontaneous. MD simulations further revealed a hierarchy in FA interaction strength with BN nanoparticles: O > N > B, with O-terminated BN exhibiting the strongest interaction. This stronger interaction correlated with reduced FA mobility, indicating tight binding. Conversely, weaker interactions, particularly with boron-terminated BN, resulted in increased FA diffusion and higher mean square displacement (MSD). The adsorption of FA significantly altered the electronic and optical properties of both BN and SiC nanoparticles, with a termination-dependent effect. Specifically, FA adsorption substantially reduced the HOMO-LUMO gap, most notably in boron-terminated BN (76.83 % reduction) compared to oxygen-terminated SiC (72.94 % reduction), leading to increased conductivity. This enhanced conductivity, coupled with the low recovery times and improved dipole moments observed, suggests the potential utility of BN and SiC nanoparticles as biosensors for FA detection. The promising adsorption energies also highlight their potential application in drug delivery systems.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112171"},"PeriodicalIF":4.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578392","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}
Pub Date : 2025-03-03DOI: 10.1016/j.diamond.2025.112172
Danil M. Shivtsov , Yury I. Bauman , Ilya V. Mishakov , Yury V. Shubin , Aleksey A. Vedyagin
A series of nickel‑tin alloys was prepared by mechanochemical alloying of nickel and tin metal powders in a planetary mill. The evolution of morphology and phase composition of these alloys depending on the tin content and the duration of the alloying procedure was studied using X-ray diffraction analysis and scanning electron microscopy. The conditions providing the formation of Ni1-xSnx solid solutions based on the face-centered cubic lattice of nickel were determined. Based on the obtained results, the main stages of the mechanochemical alloying process have been proposed. The prepared nickel‑tin alloys were tested as catalysts for the production of carbon nanofibers via catalytic chemical vapor deposition of C2-C4 hydrocarbons at 650 °C. An optimal value of the mechanochemical alloying duration in terms of carbon yield was found to be 5 min. Another key factor affecting the catalytic performance is the tin content in the alloy composition. Thus, when tin was introduced in the amount of 0.5–3 at.%, the carbon yield after 30 min of reaction exceeded 120 g/gcat. Moreover, the tin content also influences the morphology and the diameter of carbon nanofibers, as well as the character of their growth. Depending on the tin content, the carbon filament diameter can be varied in the range from 20 to 500 nm. All carbon materials synthesized using NiSn alloys possess a high specific surface area of ≥250 m2/g and a total pore volume > 0.4 cm3/g. Such textural characteristics make these materials attractive for use as sorbents or catalyst supports.
{"title":"Production of carbon nanofibers from C2-C4 hydrocarbons over highly efficient NiSn catalysts prepared by mechanochemical alloying","authors":"Danil M. Shivtsov , Yury I. Bauman , Ilya V. Mishakov , Yury V. Shubin , Aleksey A. Vedyagin","doi":"10.1016/j.diamond.2025.112172","DOIUrl":"10.1016/j.diamond.2025.112172","url":null,"abstract":"<div><div>A series of nickel‑tin alloys was prepared by mechanochemical alloying of nickel and tin metal powders in a planetary mill. The evolution of morphology and phase composition of these alloys depending on the tin content and the duration of the alloying procedure was studied using X-ray diffraction analysis and scanning electron microscopy. The conditions providing the formation of Ni<sub>1-x</sub>Sn<sub>x</sub> solid solutions based on the face-centered cubic lattice of nickel were determined. Based on the obtained results, the main stages of the mechanochemical alloying process have been proposed. The prepared nickel‑tin alloys were tested as catalysts for the production of carbon nanofibers via catalytic chemical vapor deposition of C2-C4 hydrocarbons at 650 °C. An optimal value of the mechanochemical alloying duration in terms of carbon yield was found to be 5 min. Another key factor affecting the catalytic performance is the tin content in the alloy composition. Thus, when tin was introduced in the amount of 0.5–3 at.%, the carbon yield after 30 min of reaction exceeded 120 g/g<sub>cat</sub>. Moreover, the tin content also influences the morphology and the diameter of carbon nanofibers, as well as the character of their growth. Depending on the tin content, the carbon filament diameter can be varied in the range from 20 to 500 nm. All carbon materials synthesized using NiSn alloys possess a high specific surface area of ≥250 m<sup>2</sup>/g and a total pore volume > 0.4 cm<sup>3</sup>/g. Such textural characteristics make these materials attractive for use as sorbents or catalyst supports.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112172"},"PeriodicalIF":4.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551994","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}
The use of fossil fuels for energy generation is a well-known environmental issue. To overcome this problem, it is vital to discover a pollution-free energy source where hydrogen is used as a renewable energy resource. Due to its abundance on earth and zero carbon emission, it can substitute fossil fuels. Electrochemical water splitting is best method for producing molecular hydrogen as a sustainable energy source. Herein, a nanocomposite of transition metal-based spinel with rGO was synthesized by solvothermal method for OER activity. Various analytical approaches were employed to analyze the CoCr2O4/rGO composite that revealed its phase structure. The BET adsorption isotherm showed that its structure was mesoporous. Due to their unique mesoporous configuration, CoCr2O4/rGO composite shows enhanced electrical conductivity, improved thermal stability, and increased surface area. Furthermore, Electrochemical tests of composite in 1 M KOH revealed a lower overpotential 274 mV and Tafel 53 mV dec−1 for OER. The exceptional findings achieved by electrochemical activity imply that nanocomposite of CoCr2O4/rGO acts as excellent electrocatalyst for OER applications.
{"title":"Preparation of nano-composite of CoCr2O4 with rGO by solvothermal method for water splitting","authors":"Sidra Jabeen , Ashfaq Ahmad , Abhinav Kumar , Sarah A. Alsalhi , Jayanti Makasana , Suhas Ballal , R.S.K. Sharma , Piyus Kumar Pathak , Rahul Raj Chaudhary , Vijayalaxmi Mishra","doi":"10.1016/j.diamond.2025.112167","DOIUrl":"10.1016/j.diamond.2025.112167","url":null,"abstract":"<div><div>The use of fossil fuels for energy generation is a well-known environmental issue. To overcome this problem, it is vital to discover a pollution-free energy source where hydrogen is used as a renewable energy resource. Due to its abundance on earth and zero carbon emission, it can substitute fossil fuels. Electrochemical water splitting is best method for producing molecular hydrogen as a sustainable energy source. Herein, a nanocomposite of transition metal-based spinel with rGO was synthesized by solvothermal method for OER activity. Various analytical approaches were employed to analyze the CoCr<sub>2</sub>O<sub>4</sub>/rGO composite that revealed its phase structure. The BET adsorption isotherm showed that its structure was mesoporous. Due to their unique mesoporous configuration, CoCr<sub>2</sub>O<sub>4</sub>/rGO composite shows enhanced electrical conductivity, improved thermal stability, and increased surface area. Furthermore, Electrochemical tests of composite in 1 M KOH revealed a lower overpotential 274 mV and Tafel 53 mV dec<sup>−1</sup> for OER. The exceptional findings achieved by electrochemical activity imply that nanocomposite of CoCr<sub>2</sub>O<sub>4</sub>/rGO acts as excellent electrocatalyst for OER applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112167"},"PeriodicalIF":4.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601497","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}
Amorphous carbon (a-C:I) thin films have been developed on glass substrates by a simplistic PE-CVD method. The films have been synthesized from CH3I solution with iodine added at a concentration of 0.5 mg/mL. XRD study elicits the amorphous nature of the films. SEM images reveal that the films are disk-like and rough. EDS data ensures that the thin films mainly composed of carbon and iodine. The FTIR spectra reveal the stretching vibration of CI bond. Transmittance of the films initially increases with time and then stabilized. The bandgap of the synthesized a-C:I thin films have been calculated to be in the range of ∼2.12 to 2.45 eV. The findings are promising for the applications of a-C:I films in optoelectronic devices.
{"title":"Synthesis of amorphous carbon (a-C) thin films from the iodomethane chemical route by PE-CVD method for optoelectronic devices","authors":"Shochin Chandra Das , Jaker Hossain , Md. Mahbubor Rahman , Mamunur Rashid Talukder","doi":"10.1016/j.diamond.2025.112173","DOIUrl":"10.1016/j.diamond.2025.112173","url":null,"abstract":"<div><div>Amorphous carbon (a-C:I) thin films have been developed on glass substrates by a simplistic PE-CVD method. The films have been synthesized from CH<sub>3</sub>I solution with iodine added at a concentration of 0.5 mg/mL. XRD study elicits the amorphous nature of the films. SEM images reveal that the films are disk-like and rough. EDS data ensures that the thin films mainly composed of carbon and iodine. The FTIR spectra reveal the stretching vibration of C<img>I bond. Transmittance of the films initially increases with time and then stabilized. The bandgap of the synthesized a-C:I thin films have been calculated to be in the range of ∼2.12 to 2.45 eV. The findings are promising for the applications of a-C:I films in optoelectronic devices.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112173"},"PeriodicalIF":4.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551894","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}
Nanocomposites that integrate electrostatic charge accumulation and faradic reaction mechanisms hold significant potential as high-performance supercapacitor electrodes for electrochemical energy storage. However, the development of low-cost carbon composites derived from renewable resources remains challenging. Herein, we demonstrate two different conducting polymers such as polyaniline (PA) and polypyrrole (PP) with incorporation of biomass-derived activated carbon from Strychnos Potatorum shells (SPAC) through in-situ polymerization. The SPAC was prepared through pre‑carbonization followed by a physical activation method. The structural defects of the as-synthesized polymer composites were characterized thoroughly by various physicochemical techniques including Fourier transform infrared (FT-IR), Raman, X-ray diffraction (XRD), thermogravimetric analysis (TGA), Brunauer–Emmett–Teller (BET), and Field emission scanning electron microscopy (FE-SEM). Further, the PA and PP composite electrode materials were examined by electrochemical methods such as cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) techniques. Under the optimal conditions, the high specific capacitance was observed in PA@SPAC30 (214 F g−1) at 1.0 A g−1 compared to other composites such as PA@SPAC5 (35.2 F g−1), PA@SPAC10 (75.2 F g−1), PA@SPAC15 (101.4 F g−1), PA@SPAC50 (175.4, F g−1) and neat PA (168 F g−1), respectively. The specific capacitance of PP@SPAC5, PP@SPAC10, PP@SPAC15, PP@SPAC30, PP@SPAC50, and neat PP composites series, are 37.5, 76.4, 202.8, 144, 139.5, and 146 F g−1 respectively, at 1.0 A g−1. The rapid GCD characteristics of PA@SPAC30 and PP@SPAC15 are due to their excellent porosity and well-structured architectural morphology, which facilitate short ion diffusion paths and unrestricted access during GCD cycles. The specific capacitance are remains 94.55 % and 95.8 % of initial capacitance demonstrating that the PA@SPAC30 and PP@SPAC15 electrodes exhibit remarkable cyclability over 5000 GCD cycles.
{"title":"Improved capacitive performance of conducting polymer with incorporation of biomass derived activated carbon for supercapacitors","authors":"Murugan Vinayagam , Rajendran Suresh Babu , Arumugam Sivasamy , A.L.F. de Barros","doi":"10.1016/j.diamond.2025.112165","DOIUrl":"10.1016/j.diamond.2025.112165","url":null,"abstract":"<div><div>Nanocomposites that integrate electrostatic charge accumulation and faradic reaction mechanisms hold significant potential as high-performance supercapacitor electrodes for electrochemical energy storage. However, the development of low-cost carbon composites derived from renewable resources remains challenging. Herein, we demonstrate two different conducting polymers such as polyaniline (PA) and polypyrrole (PP) with incorporation of biomass-derived activated carbon from <em>Strychnos Potatorum</em> shells (SPAC) through in-situ polymerization. The SPAC was prepared through pre‑carbonization followed by a physical activation method. The structural defects of the as-synthesized polymer composites were characterized thoroughly by various physicochemical techniques including Fourier transform infrared (FT-IR), Raman, X-ray diffraction (XRD), thermogravimetric analysis (TGA), Brunauer–Emmett–Teller (BET), and Field emission scanning electron microscopy (FE-SEM). Further, the PA and PP composite electrode materials were examined by electrochemical methods such as cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) techniques. Under the optimal conditions, the high specific capacitance was observed in PA@SPAC30 (214 F g<sup>−1</sup>) at 1.0 A g<sup>−1</sup> compared to other composites such as PA@SPAC5 (35.2 F g<sup>−1</sup>), PA@SPAC10 (75.2 F g<sup>−1</sup>), PA@SPAC15 (101.4 F g<sup>−1</sup>), PA@SPAC50 (175.4, F g<sup>−1</sup>) and neat PA (168 F g<sup>−1</sup>), respectively. The specific capacitance of PP@SPAC5, PP@SPAC10, PP@SPAC15, PP@SPAC30, PP@SPAC50, and neat PP composites series, are 37.5, 76.4, 202.8, 144, 139.5, and 146 F g<sup>−1</sup> respectively, at 1.0 A g<sup>−1</sup>. The rapid GCD characteristics of PA@SPAC30 and PP@SPAC15 are due to their excellent porosity and well-structured architectural morphology, which facilitate short ion diffusion paths and unrestricted access during GCD cycles. The specific capacitance are remains 94.55 % and 95.8 % of initial capacitance demonstrating that the PA@SPAC30 and PP@SPAC15 electrodes exhibit remarkable cyclability over 5000 GCD cycles.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112165"},"PeriodicalIF":4.3,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551993","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}
Pub Date : 2025-03-01DOI: 10.1016/j.diamond.2025.112146
Abdul Khaliq , Sarah A. Alsalhi , Abhinav Kumar
Transition metal-based spinel oxides have become attractive materials for supercapacitor electrodes because of higher specific capacitance (Cs) and low cost. Nonetheless, spinel materials have limited stability because of small interfacial area. Carbonaceous electrode materials like rGO mitigated this problem by enhancing the electroactive surface area and increasing the active sites. This study employed hydrothermal synthesis to fabricate NiBi2O4/rGO (NBO/rGO). The materials potential as electrodes was evaluated utilizing 3-electrode configuration and several electrochemical techniques to evaluate the attributes of NBO and NBO/rGO. The fabricated NBO/rGO demonstrates Cs of 1104.87 F g−1 at 1 A g−1 also remarkable stability over the 3000th cycle and energy density (25.79 Wh kg−1). Electrochemical studies indicate that rGO enhances the overall stability of NBO by prolonging the discharge time interval, hence boosting the Cs. This study demonstrates that rGO can enhance the performance of NBO in various energy-storing systems.
{"title":"Efficient NiBi2O4/rGO electrode material for energy storage device","authors":"Abdul Khaliq , Sarah A. Alsalhi , Abhinav Kumar","doi":"10.1016/j.diamond.2025.112146","DOIUrl":"10.1016/j.diamond.2025.112146","url":null,"abstract":"<div><div>Transition metal-based spinel oxides have become attractive materials for supercapacitor electrodes because of higher specific capacitance (C<sub>s</sub>) and low cost. Nonetheless, spinel materials have limited stability because of small interfacial area. Carbonaceous electrode materials like rGO mitigated this problem by enhancing the electroactive surface area and increasing the active sites. This study employed hydrothermal synthesis to fabricate NiBi<sub>2</sub>O<sub>4</sub>/rGO (NBO/rGO). The materials potential as electrodes was evaluated utilizing 3-electrode configuration and several electrochemical techniques to evaluate the attributes of NBO and NBO/rGO. The fabricated NBO/rGO demonstrates C<sub>s</sub> of 1104.87 F g<sup>−1</sup> at 1 A g<sup>−1</sup> also remarkable stability over the 3000<sup>th</sup> cycle and energy density (25.79 Wh kg<sup>−1</sup>). Electrochemical studies indicate that rGO enhances the overall stability of NBO by prolonging the discharge time interval, hence boosting the C<sub>s</sub>. This study demonstrates that rGO can enhance the performance of NBO in various energy-storing systems.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112146"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551995","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}
Pub Date : 2025-03-01DOI: 10.1016/S0925-9635(25)00231-6
{"title":"Outside Front Cover - Journal name, Cover image, Volume issue details, ISSN, Cover Date, Elsevier Logo and Society Logo if required","authors":"","doi":"10.1016/S0925-9635(25)00231-6","DOIUrl":"10.1016/S0925-9635(25)00231-6","url":null,"abstract":"","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"153 ","pages":"Article 112174"},"PeriodicalIF":4.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-01DOI: 10.1016/j.diamond.2025.112157
Haifa A. Al-Yousef , Lamia Abu El Maati , Muneerah Alomar , Hafiz Muhammad Tahir Farid , Salma Eman , Taghreed Bahlool
Energy is a primary requirement of the modern age, and water-splitting is recognized as a green energy source. Developing efficient, high-performance, and cost-effective electrocatalysts has become a significant pursuit in improving water-splitting productivity. In this context, a hydrothermally synthesized, advantageous, environmentally friendly and economically efficient FeAlO3/g-CN (FAO/g-CN) hybrid material enhances water oxidation. Multiple analytical methods examine the components' morphological, textural, structural, and compositional characteristics, highlighting the need for efficient and cost-effective solutions. The electrochemical characteristics of the FeAlO3/g-CN composite have been evaluated in a 1 M potassium hydroxide (KOH), revealing an extraordinarily lower overpotential (212 mV) at an optimal current density (j) of 10 mA/cm2. A minimum charge transfer resistance (Rct) of 0.04 Ω and notable longevity (50 h) indicates the synthesized material's outstanding prospects for oxygen evolution reaction (OER). Subsequent analysis has exposed a notably low Tafel value (32 mV/dec), signifying that FeAlO3/g-CN nanocomposite has enhanced electrocatalytic effectiveness and rapid reaction kinetics. The nanocomposite demonstrates significant applications for water electrolysis and other electrochemical activities, thereby underlining its potential impact on renewable energy.
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