Materials Research Bulletin最新文献

{"title":"Pyridine and carbon co-modified carbon nitride for synergistic photocatalytic hydrogen production and pollutant degradation","authors":"Huixia Li ,&nbsp;Hui Fan ,&nbsp;Hongping Li ,&nbsp;Liang Zhang ,&nbsp;Xuan Guan ,&nbsp;Yanjuan Cui","doi":"10.1016/j.materresbull.2026.113998","DOIUrl":"10.1016/j.materresbull.2026.113998","url":null,"abstract":"<div><div>Photocatalytic hydrogen evolution from wastewater addresses the dual challenges of energy crisis and environmental pollution. A pyridine and carbon co-modified carbon nitride (UCN-D) bifunctional photocatalyst was successfully constructed via one-step thermal polymerization using 2,2′-bipyridine-4,4′-dicarboxylic acid (H₂dcbpy) as a copolymerization monomer. This modification extends the π-conjugated system, optimizes visible light absorption, and creates an internal electric field with a significant dipole moment, facilitating the separation of photogenerated carriers. UCN-D achieves H₂ production of 125.9 μmol·h^-1 in pure water, which is 2.2 times that prior to modification. In simulated wastewater, it simultaneously degrades multiple organic pollutants while maintaining high hydrogen production, demonstating excellent bifunctionality and stability. Theoretical calculations further confirm that pyridine-ring modification reduces the band energy levels and enhances ·OH generation, a crucial factor promoting anaerobic degradation. This work presents a novel strategy for designing effective metal-free bifunctional catalysts aimed at synergistic environmental remediation and resource utilization.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"198 ","pages":"Article 113998"},"PeriodicalIF":5.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145980876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Green synthesis of spherical ZnO nanoplates possessing lower band gap energy and higher photocatalytic performance","authors":"Parmeshwar Lal Meena ,&nbsp;Rohitash Meena ,&nbsp;Jugmohan Meena ,&nbsp;Sapna Meena ,&nbsp;Ajay Kumar Surela ,&nbsp;Nitin Kumar ,&nbsp;Hari Ram Dhanetia ,&nbsp;Manickam Selvaraj","doi":"10.1016/j.materresbull.2026.113996","DOIUrl":"10.1016/j.materresbull.2026.113996","url":null,"abstract":"<div><div>The biosynthesis of semiconductor nanophotocatalysts using plant waste represents an environmentally benign and facile strategy. In this study, ZnO nanoparticles with spherical plate-like morphologies were synthesized using Tamarind (Tamarindus indica) seed extract. The mean crystallite sizes—14.92 nm, 24.98 nm, and 17.78 nm were determined through the Scherrer, W–H, and M–S methods, respectively, and the band gap was calculated to be 2.95 eV. Several physical parameters derived from XRD analysis were also evaluated for the ZnO nanoplates, including dislocation density (3.743 × 10⁻³), microstrain (6.806 × 10⁻³), atomic packing factor (0.7556), Zn–O bond length (1.9739 Å), unit cell volume (47.3409 ų), and density (5.68 g cm⁻³). PL, EDS, and XPS analyses confirmed the presence of oxygen defects within the ZnO crystal lattice. In the single-dye systems, the ZnO spherical nanoplates exhibited maximum photodegradation efficiencies of 97.39%, 86.57%, and 60.24% for Brilliant Cresyl Blue (BCB), Methylene Blue (MB), and Toluidine Blue (TB), respectively, at pH 10, while Rhodamine B (RhB) showed 42.72% degradation at pH 5 under visible-light irradiation. The mixed-dye solution also underwent effective photodegradation, attributable to the reduced band gap and the suppression of electron–hole recombination resulting from defect formation within the lattice. These defects facilitated charge migration and prolonged charge-carrier lifetime by delaying recombination. Hydroxyl radicals were identified as the predominant reactive species responsible for dye degradation, and the slight reduction in photocatalytic performance over four successive recycles demonstrated the good reusability and stability of the prepared ZnO.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"198 ","pages":"Article 113996"},"PeriodicalIF":5.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145980877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Waste-to-wealth derived β-CaSiO3: Pr3+ phosphors for next generation energy storage and anti-counterfeiting technologies","authors":"N. Navya ,&nbsp;B. R. Radha Krushna ,&nbsp;S.C. Sharma ,&nbsp;Subhashree Ray ,&nbsp;R. Sivayogana ,&nbsp;P. Manod ,&nbsp;S. Akila ,&nbsp;Chandrashekhar R. Chikkegowda ,&nbsp;K. Manjunatha ,&nbsp;Sheng Yun Wu ,&nbsp;R. Arunakumar ,&nbsp;H. Nagabhushana","doi":"10.1016/j.materresbull.2026.114020","DOIUrl":"10.1016/j.materresbull.2026.114020","url":null,"abstract":"<div><div>Red emitting praseodymium (Pr³⁺) activated β-CaSiO₃ phosphors are synthesized via facile green combustion approach using bamboo leaves and eggshells as ecofriendly biogenic sources of silica and calcium. Photoluminescence (PL) measurements revealed an intense red emission centered at 652 nm, attributed to the ³P₀→³F₂ transition of Pr³⁺ under 453 nm excitation, delivering a high color purity of 86.9% with CIE chromaticity coordinates of (0.5998, 0.3562) at the optimized 2 mol% dopant concentration. The enhanced emission intensity demonstrates the efficiency of the β-CaSiO₃ host in minimizing nonradiative losses and stabilizing Pr³⁺ sites. Further, Electrochemical studies are conducted and all the electrodes exhibit smooth, quasi rectangular CV profiles without discernible anodic cathodic peak pairs, indicating that the charge storage mechanism is predominantly capacitive in nature. The optimized β-CaSiO₃:5Pr³⁺ electrode delivering a specific capacitance (C_sp) of 208.7 Fg^-1 at 5 mV s^-1, energy density (E_D) of 3.257 Whkg^-1, and power density (P_D) of 265 Wkg^-1 at 1 Ag^-1, while maintaining 89.97 % capacitance retention after 5000 charge discharge cycles, confirming its high electrochemical durability. Additionally, the optimized β-CaSiO₃:5Pr³⁺ phosphor exhibited outstanding performance as a security ink when applied to various substrates using the brush method. The fabricated anti-counterfeiting (AC) labels showed excellent long-term storage stability, photostability, and thermal resistance. These findings confirm the potential of β-CaSiO₃:Pr³⁺ phosphor for application in supercapacitors and AC technologies.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"198 ","pages":"Article 114020"},"PeriodicalIF":5.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146170059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tuning the adsorption behavior of a solitary adsorbent based on the Boric Acid–Oleylamine framework and Psyllium: A sustainable approach for simultaneous removal of oil/organic solvent and water-soluble contaminants","authors":"Kriti,&nbsp;Kiran Kumar,&nbsp;Ghanshyam S. Chauhan,&nbsp;Sandeep Chauhan","doi":"10.1016/j.materresbull.2026.114015","DOIUrl":"10.1016/j.materresbull.2026.114015","url":null,"abstract":"<div><div>The fabrication of advanced adsorbents capable of removing mixed water contaminants is crucial in wastewater treatment. Here, a novel sorbent (Est-Psy-<em>g</em>-BOF) was synthesized through a multistep process to simultaneously remove methylene green (MG), toluene, and diesel from water. First, the boric acid-oleylamine framework (BOF) was prepared. BOF was grafted onto psyllium to impart hydrophilic characteristics. Finally, the product was esterified to improve the hydrophobic behavior of the material. The final product (Est-Psy-<em>g-</em>BOF) adsorbs diesel (4.62 g/g) and toluene (4.3 g/g) at 35 °C within 105 min, and MG with a removal efficiency of 91.4 % within 30 min. The adsorption processes using Est-Psy-<em>g-</em>BOF follow different kinetic models: pseudo-second order (PSO) for MG, indicating chemisorption, and pseudo-first order (PFO) for diesel and toluene, indicating physisorption. The Est-Psy-<em>g</em>-BOF exhibited 70 % dye removal efficiency even in the presence of diesel. The Est-Psy-<em>g</em>-BOF exhibited excellent reusability, allowing efficient regeneration and repeated use across several cycles.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"198 ","pages":"Article 114015"},"PeriodicalIF":5.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of surface chemistry, corrosion, and superelastic properties of Ti2Ni-rich TiNi alloy treated by electron and ion beams","authors":"V.O. Semin ,&nbsp;F.A. D’yachenko ,&nbsp;A.V. Erkovich ,&nbsp;M.G. Ostapenko ,&nbsp;D.V. Chepelev ,&nbsp;L.L. Meisner","doi":"10.1016/j.materresbull.2026.114001","DOIUrl":"10.1016/j.materresbull.2026.114001","url":null,"abstract":"<div><div>Studies were conducted on the phase and chemical composition, electrochemical properties, and superelastic behavior of a Ti₂Ni-rich near-equiatomic TiNi alloy exhibiting different surface treatments (electropolishing, irradiation with a low-energy high-current electron beam, high-dose ion implantation). The thickness of the oxygen-rich surface layer in the irradiated samples was found to be twice that of the electropolished alloy. Additionally, ZrO₂ and Ni-Zr phases formed in the upper surface layer after Zr⁺ ion implantation. Tafel extrapolation results showed that the electropolished alloy exhibited the lowest corrosion current. Electrochemical impedance spectroscopy highlights the advantages of electron-beam treatment in improving the self-passivation ability of the TiNi alloy. Evaluation of the superelastic behavior showed that neither electron beam nor ion beam surface treatments negatively affect the superelastic properties of the TiNi substrate, but rather promote a decrease in plastic deformation.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"198 ","pages":"Article 114001"},"PeriodicalIF":5.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Self-assembled monolayer-based ETLs for perovskite solar cells: A review","authors":"Othmane El baz,&nbsp;Mohamed Ilsouk,&nbsp;Sarah Derbali","doi":"10.1016/j.materresbull.2026.114029","DOIUrl":"10.1016/j.materresbull.2026.114029","url":null,"abstract":"<div><div>Perovskite solar cells (PSCs) are gaining significant attention due to their remarkable power conversion efficiencies (PCEs), cost-effective fabrication, and scalable manufacturing processes. Meanwhile, self-assembled monolayers (SAMs) have emerged as useful interfacial materials and as effective hole transport layers (HTLs) in PSCs with tunable energy-level alignment, passivation properties, and improved charge transport properties. Recently their application as electron transport layers (ETLs) has gained much more attention as an economically viable and scalable option compared to conventional inorganic ETLs while ensuring improved device performance. The present review provides an overview of the advantages of SAMs and their role in modifying the interfaces between HTLs and perovskite, as well as between ETLs and perovskite. In addition, this review focuses on the latest advances in SAM-based ETLs demonstrating their potential to replace the conventional ETLs used in PSCs. The challenges associated with the application of SAMs in PSCs are also discussed, including issues related to stability and characterization techniques.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"198 ","pages":"Article 114029"},"PeriodicalIF":5.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable valorization of green tea waste into inherent-heteroatom-activated carbon for environmental remediation and energy applications","authors":"Kanchan Parmar ,&nbsp;Nitika Bhutani ,&nbsp;Akriti Gautam ,&nbsp;Pankaj Kumar Singh ,&nbsp;Rik Rani Koner ,&nbsp;Aditi Halder","doi":"10.1016/j.materresbull.2026.114014","DOIUrl":"10.1016/j.materresbull.2026.114014","url":null,"abstract":"<div><div>This study involves synthesis of micro-mesoporous activated carbon (derived from green tea waste), of specific surface area of 1044 m² g⁻¹, enriched with O- and N- functional groups, exhibits dual functionality in dyes removal and supercapacitor applications. The maximum adsorption capacities of 641.0 mg g⁻¹ for methylene blue and 568.2 mg g⁻¹ for methyl orange, with up to 99% removal efficiencies across various pH levels. A model cartridge filter was developed and tested. This electrode material for supercapacitors exhibits a specific capacitance of 254 F g⁻¹ at a current density of 1 A g⁻¹, surpassing that of commercial activated carbon (190 F g⁻¹). In a symmetric coin cell device, with 100% capacitance retention after 10,000 charge–discharge cycles with the specific capacitance of 144.3 F g⁻¹ and a power density of 3307 W Kg⁻¹ at an energy density of 5.51 Wh Kg⁻¹ at a current density of 10 A g⁻¹.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"198 ","pages":"Article 114014"},"PeriodicalIF":5.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and analysis of titanium nitride/titanium oxynitride films using colliding plasma pulsed laser deposition techniques","authors":"Ravi Pratap Singh ,&nbsp;Astha Shukla","doi":"10.1016/j.materresbull.2026.114030","DOIUrl":"10.1016/j.materresbull.2026.114030","url":null,"abstract":"<div><div>Titanium nitride/oxynitride thin films hold significant potential for use as transparent coatings and for creating functionalized surfaces. We have investigated the synthesis and analysis of titanium nitride/ titanium oxynitride thin films on quartz substrates using reactive colliding pulsed laser deposition (CPLD) technique. The major challenge in reactive pulsed laser deposition of titanium nitride/oxynitride is controlling the reactive incorporation of nitrogen and oxygen species in the titanium plasma, due to complex plasma plume dynamics. Here, we have systematically investigated the interaction and expansion of colliding titanium plasma plumes over a broad pressure range (10⁻⁵ mbar to 10 mbar) using 2D imaging. The 2D imaging reveals that expansion of the plasma plume is strongly influenced by background pressure. At low pressure colliding plasma plumes expand freely in forward direction. While higher pressure leads to plume confinement due to increased collisions between the plasma and ambient species. Based on this study, we performed colliding-plume PLD in ambient air to deposit TiN/oxynitride films. The characterization of deposited films using XRD and EDXA confirms the presence of titanium nitride/ oxynitride phases with nitrogen content of ≈5 wt% and significant oxygen arising from both substrate and oxide formation. Optical transmittance measurements show the high transmittance (∼90%) in the range 400 nm-700 nm, consistent with non-uniform distribution of titanium nitride particulates and presence of titanium oxynitride.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"198 ","pages":"Article 114030"},"PeriodicalIF":5.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spray-pyrolyzed potassium-sodium niobate hollow spheres for enhanced photoelectrocatalytic oxygen evolution","authors":"Fabiano R. Praxedes ,&nbsp;Miqueias L. Portugal ,&nbsp;Ulisses F. Kaneko ,&nbsp;Marcos F.S. Teixeira ,&nbsp;Silvania Lanfredi","doi":"10.1016/j.materresbull.2026.114003","DOIUrl":"10.1016/j.materresbull.2026.114003","url":null,"abstract":"<div><div>In this study, nanostructured potassium-sodium niobate (K₀.₅Na₀.₅NbO₃, KNN) hollow spheres were successfully synthesized via ultrasonic spray pyrolysis. The hollow morphology, composed of hierarchically assembled nanoplates, provided a high surface area advantageous for catalytic applications. Structural characterization by XRD and Rietveld refinement confirmed a pure monoclinic perovskite phase. Advanced local structure analysis using EXAFS revealed a significant contraction in the Nb-O bond length (1.871 Å) compared to the average long-range crystallographic model (1.938 Å), highlighting the importance of local disorder. The KNN hollow spheres were investigated as photoanodes for the oxygen evolution reaction (OER). Under visible-light irradiation (LED), the material exhibited a remarkable 120 mV reduction in onset potential compared to dark conditions, demonstrating photo-enhanced thermodynamics. However, Tafel analysis indicated slower kinetics under illumination, attributed to light-induced surface restructuring or intermediate stabilization. Electrochemical impedance spectroscopy revealed an exponential decrease in charge transfer resistance with increasing light intensity, saturating at high power, while Mott-Schottky analysis confirmed n-type behavior with photo-active surface states around 1.25 V vs. SCE. The turnover frequency (TOF) at +1.5 V increased with light power, reaching 71.8 s⁻¹ at 50 W, concurrent with a significant increase in electron lifetime. These findings establish KNN hollow spheres as promising photoanodes and provide critical insights into the complex interplay between light-induced charge generation, local structure, and interfacial kinetics in perovskite-based photocatalysts.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"198 ","pages":"Article 114003"},"PeriodicalIF":5.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145980875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Mn doping on the structural, impedance and modulus behaviour of lead free (BaCa)(ZrTiO3) ceramics","authors":"Suchismita Sahoo ,&nbsp;A. Sathiya Priya ,&nbsp;Sharmistha Anwar ,&nbsp;Shahid Anwar","doi":"10.1016/j.materresbull.2026.114017","DOIUrl":"10.1016/j.materresbull.2026.114017","url":null,"abstract":"<div><div>(Ba_0.85Ca_0.15)(Zr_0.1Ti_0.9)_1-xMn_xO₃ ceramics (x = 0.01–0.05) were synthesized via the solid-state reaction method combined with ball milling to investigate their impedance, electrical modulus, conductivity, scaling spectra, and Nyquist behaviour over the temperature range of 250–500 °C and frequency range of 1 Hz to 1 MHz. Impedance analysis revealed a continuous decrease in Z′ with an increase in temperature, indicating enhanced charge carrier mobility. Distinct contributions from grains and grain boundaries were observed. Nyquist plots showed two semi-circular arcs corresponding to grain and grain boundary contributions relaxation process. Equivalent circuit modeling was employed to interpret the electrical response, and the non-exponential Kohlrausch-Williams-Watts (KWW) function effectively fitted the imaginary part of the electric modulus. AC conductivity varied ranged from 0.002 -0.012 S/m, and the activation energy was increased with Mn doping from the range of 0.8 to 0.9 eV. These findings provide valuable insights into the conduction and relaxation mechanisms, offering a promising route for the development of high-performance materials for flexible energy and storage devices.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"198 ","pages":"Article 114017"},"PeriodicalIF":5.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024532","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}