Materials Research Bulletin最新文献_第2页

Highly efficient one-pot three-component synthesis of novel organoboron markers for diesel fuel 新型柴油用有机硼标记物的高效一锅三组分合成

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-07-18 DOI: 10.1016/j.materresbull.2025.113668

Nereida S. Campos-Medellín , Rosa M. Jiménez-Barrera , Horacio Reyes-Pérez , Emanuel Bojórquez-Quíntal , Eugenio Hernández-Fernández , Abner Esperanza-Norzagaray , Rodrigo Chan-Navarro , María C. García-López

{"title":"Highly efficient one-pot three-component synthesis of novel organoboron markers for diesel fuel","authors":"Nereida S. Campos-Medellín , Rosa M. Jiménez-Barrera , Horacio Reyes-Pérez , Emanuel Bojórquez-Quíntal , Eugenio Hernández-Fernández , Abner Esperanza-Norzagaray , Rodrigo Chan-Navarro , María C. García-López","doi":"10.1016/j.materresbull.2025.113668","DOIUrl":"10.1016/j.materresbull.2025.113668","url":null,"abstract":"<div><div>In the present work, four fluorescent organoboron esters have been prepared by a fast self-assembly-assisted synthesis, achieved in short reaction time. The resulting organoboron esters were elucidated by <sup>1</sup>H and <sup>11</sup>B NMR, as well as mass spectrometry, and for <strong>3</strong> was further confirmed by single-crystal diffraction method, where the solved crystal structure shows a tetracoordinate boron atom with a distorted tetrahedral geometry. The photophysical behavior of all derivatives was analyzed in a fresh solution, demonstrating the presence of negative solvatochromism. Additionally, phenylboronic acid derivative 2, featuring <em>tert</em>‑butyl groups, demonstrated superior photostability compared to their derivatives. Mass spectrometry analysis also indicated energetic stability of the molecular ion of compound <strong>4</strong>. Notably, compound <strong>2</strong> exhibited good solubility, high photostability, thermal decomposition above 200 °C and adequate emissive properties, making it a promising fluorescent dye for fuel marking applications. Its exceptional photostability, positions molecule <strong>2</strong> as a promising candidate for fuel marker applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"193 ","pages":"Article 113668"},"PeriodicalIF":5.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Combining two biocompatible singlet oxygen generators into a potent photoactive agent: Graphene quantum dots-curcuma hybrid 将两个生物相容的单线态氧气发生器组合成一种强效光活性剂：石墨烯量子点-姜黄混合物

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-07-18 DOI: 10.1016/j.materresbull.2025.113667

Mila Milenković , Milica Budimir Filimonović , Gabriele Ciasca , Dušan Milivojević , Jovana Prekodravac Filipović , Marija Mojsin , Svetlana Jovanović , Biljana Todorović Marković

{"title":"Combining two biocompatible singlet oxygen generators into a potent photoactive agent: Graphene quantum dots-curcuma hybrid","authors":"Mila Milenković , Milica Budimir Filimonović , Gabriele Ciasca , Dušan Milivojević , Jovana Prekodravac Filipović , Marija Mojsin , Svetlana Jovanović , Biljana Todorović Marković","doi":"10.1016/j.materresbull.2025.113667","DOIUrl":"10.1016/j.materresbull.2025.113667","url":null,"abstract":"<div><div>As a cutting-edge treatment strategy, photodynamic therapy (PDT) utilizes light-sensitive compounds to selectively destroy target cells, offering extensive possibilities for managing numerous medical conditions, including bacterial infections and tumors. Graphene quantum dots (GQDs), zero-dimensional nanomaterials, possess unique properties that make them ideal for biomedical applications, including high dispersibility, biocompatibility, and luminescent emission. In this study, we synthesized GQDs and modified them by incorporating curcumin, a natural compound known for its antimicrobial properties. Both UV–Vis and infrared spectroscopies confirmed the formation of the hybrid material. AFM and DLS analyses revealed an increase in particle size and changes in zeta potential, indicating successful incorporation of curcumin. Notably, the modified GQDs exhibited enhanced singlet oxygen production under blue light irradiation, as proven with EPR spectroscopy and ABDA degradation, demonstrating their potential as a photosensitizer of a new generation for PDT.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"193 ","pages":"Article 113667"},"PeriodicalIF":5.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144695213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Accelerated and cost-effective synthesis of NaFe0.5Mn0.5O2 layered oxide cathode material and performance evaluation in sodium-ion batteries NaFe0.5Mn0.5O2层状氧化物正极材料的快速高效合成及其在钠离子电池中的性能评价

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-07-17 DOI: 10.1016/j.materresbull.2025.113666

Buzaina Moossa , R․A․ Harindi Gayara , Ahsan Ishtiaq Qureshi , Muntaha Elsadig Siddig Ali , Talha Khan , Shahid Rasul , Ramazan Kahraman , Talal Mohammed Al Tahtamouni , R․A․ Shakoor

{"title":"Accelerated and cost-effective synthesis of NaFe0.5Mn0.5O2 layered oxide cathode material and performance evaluation in sodium-ion batteries","authors":"Buzaina Moossa , R․A․ Harindi Gayara , Ahsan Ishtiaq Qureshi , Muntaha Elsadig Siddig Ali , Talha Khan , Shahid Rasul , Ramazan Kahraman , Talal Mohammed Al Tahtamouni , R․A․ Shakoor","doi":"10.1016/j.materresbull.2025.113666","DOIUrl":"10.1016/j.materresbull.2025.113666","url":null,"abstract":"<div><div>Iron and manganese-containing O3-type layered oxides cathode materials are well known for their high specific capacity and operating voltages in sodium-ion batteries (SIBs). The layered oxides with multiple transition metal combinations are aimed to utilize the synergistic relation of the transition metals and bring out enhanced electrochemical performance. However, the popular methods of synthesis most often involve very long heat treatment periods. In this work, O3-type layered oxide material NaFe<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>2</sub> is developed using a facile sol-gel followed by microwave sintering, significantly shortening the synthesis duration. The structural characterization using X-ray diffraction confirms the structural phase purity of the synthesized material, while infrared spectroscopy confirms the various metallic bonds in the material. The microwave sintering has resulted in denser and finer microstructures of the material, as confirmed by the microscopy images. The electrochemical performance of the synthesized material has also been investigated in detail. The specific discharge capacity of the synthesized material is ∼<strong>120 mAh/g</strong>, comparable to the conventional sintered layered oxide material. This work provides insights into using the microwave-assisted synthesis technique for Sodium layered oxide battery material.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"193 ","pages":"Article 113666"},"PeriodicalIF":5.3,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Oxygen vacancy-rich vanadium-oxide hole-injection layer for high-performance OLEDs 用于高性能oled的富氧空穴氧化钒注入层

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-07-17 DOI: 10.1016/j.materresbull.2025.113655

Soon-Gyu Lee , Ankhnybayar Batdelger , Hong-Gyu Park , Sang-Geon Park

{"title":"Oxygen vacancy-rich vanadium-oxide hole-injection layer for high-performance OLEDs","authors":"Soon-Gyu Lee , Ankhnybayar Batdelger , Hong-Gyu Park , Sang-Geon Park","doi":"10.1016/j.materresbull.2025.113655","DOIUrl":"10.1016/j.materresbull.2025.113655","url":null,"abstract":"<div><div>Vanadium oxide (VOₓ) has gained attention as a promising hole-injection-layer material for organic light-emitting diodes (OLEDs); however, few studies have investigated the influence of VO<sub>x</sub> impurities and oxygen vacancies on OLED performance. VO<sub>x</sub> thin films of varying thicknesses were deposited on glass/indium tin oxide substrates via thermal evaporation to investigate their wettability, chemical composition, and electronic properties. Water-contact-angle (WCA) measurements revealed a transition from moderately hydrophilic to superhydrophilic behavior as the VOₓ thickness increased from 0.5 nm to 3 nm, which is attributed to the formation of oxygen vacancies. X-ray photoelectron spectroscopy confirmed the presence of V⁴⁺ and V⁵⁺ oxidation states, with the highest V⁵⁺ concentration at 2 nm, suggesting optimal oxygen-vacancy formation. Ultraviolet photoelectron spectroscopy demonstrated a stable work function (∼4.78–4.80 eV) across all thicknesses, and valence-band maximum variations indicated vacancy-mediated electronic transitions. The findings suggest that VOₓ enhances charge-injection properties in organic light-emitting diodes by reducing the hole-injection barrier, highlighting its potential as an effective hole-transport-layer material.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"193 ","pages":"Article 113655"},"PeriodicalIF":5.3,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Co-doped Bi2Fe4O9 microcrystals as potent peroxymonosulfate activator for efficient photocatalytic degradation of RhB 共掺杂Bi2Fe4O9微晶作为高效光催化降解RhB的过氧单硫酸盐活化剂

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-07-17 DOI: 10.1016/j.materresbull.2025.113665

Yuanchun Li, Enrong Zhang, Lingfeng Tang, Yong Fu, Simin Yin

{"title":"Co-doped Bi2Fe4O9 microcrystals as potent peroxymonosulfate activator for efficient photocatalytic degradation of RhB","authors":"Yuanchun Li, Enrong Zhang, Lingfeng Tang, Yong Fu, Simin Yin","doi":"10.1016/j.materresbull.2025.113665","DOIUrl":"10.1016/j.materresbull.2025.113665","url":null,"abstract":"<div><div>Co-doped Bi<sub>2</sub>Fe<sub>4</sub>O<sub>9</sub> (BFCO) microcrystals with well-defined facets were successfully synthesized by a facile hydrothermal method. The microstructure, magnetic and photocatalytic activity of BFCO were systematically investigated. It was found that Co doping in Bi<sub>2</sub>Fe<sub>4</sub>O<sub>9</sub> greatly varied the morphology of BFCO microcrystals from rods to cubes and induced an efficient photocatalytic degradation of RhB via PMS activation under visible light. The BFCO-3 microcrystals exhibited the highest photocatalytic activity, with 98.2 % of RhB degraded in 30 min (<em>k</em> = 0.137 min<sup>−1</sup>), 4.6 times higher than that of pure Bi<sub>2</sub>Fe<sub>4</sub>O<sub>9</sub> (0.030 min<sup>−1</sup>). It was revealed that the Co doping led to a narrowed bandgap (<strong>1.75 eV</strong>), and effective separation of photo-generated electrons and holes in BFCO. And the abundant Fe<sup>2+</sup>and O<sub>v</sub> in BFCO also contributed to the remarkable photocatalytic PMS activation. Moreover, the sample possessed enhanced ferromagnetic property, making it highly attractive for magnetic recollecting in practical wastewater purification.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"193 ","pages":"Article 113665"},"PeriodicalIF":5.3,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144670334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A stable and reusable Z-scheme ZnO/Ag2CO3 photocatalyst for efficient degradation of emerging water pollutants 一种稳定且可重复使用的Z-scheme ZnO/Ag2CO3光催化剂，用于高效降解新出现的水污染物

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-07-17 DOI: 10.1016/j.materresbull.2025.113663

Ping Huang , Wei Feng , Wenhui Li , Yuquan Zhuo , Ziwen Yang , Shuo Yang , Donglai Han

{"title":"A stable and reusable Z-scheme ZnO/Ag2CO3 photocatalyst for efficient degradation of emerging water pollutants","authors":"Ping Huang , Wei Feng , Wenhui Li , Yuquan Zhuo , Ziwen Yang , Shuo Yang , Donglai Han","doi":"10.1016/j.materresbull.2025.113663","DOIUrl":"10.1016/j.materresbull.2025.113663","url":null,"abstract":"<div><div>We report ZnO/Ag<sub>2</sub>CO<sub>3</sub> (Z/AC) p–n heterojunctions synthesized via a facile two-step method to enable Z-scheme charge transfer for enhanced photocatalysis performance. Integrated SEM, TEM, XRD, FT-IR, XPS and BET analyses show that ∼5 µm wurtzite-ZnO nanospindles (NSs) are uniformly decorated with 50–200 nm monoclinic-Ag<sub>2</sub>CO<sub>3</sub> nanoparticles (NPs), forming a rough, mesoporous heterojunction whose specific surface area increases from 1.82 to 13.78 m<sup>2</sup> g⁻¹. This microarchitecture narrows the optical band-gap from 3.09 to 2.88 eV, suppresses photoluminescence by ∼65.1 %, triples the transient photocurrent, and delivers markedly enhanced photocatalytic activity. The Z/AC-4 heterojunction demonstrates the highest photocatalytic activity, achieving 97.4 % for tetracycline (TC). Scavenger experiments reveal hydroxyl radicals (·OH), holes (h⁺) and superoxide radicals (·O<sub>2</sub><sup>⁻</sup>) as key contributors, with ·OH dominant; Notably, the Z/AC-4 photocatalyst maintains 73.4 % TC degradation efficiency after five cycles, demonstrating excellent structural stability and recyclability. This work provides mechanistic insight into Z-scheme-driven photocatalysis.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"193 ","pages":"Article 113663"},"PeriodicalIF":5.3,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sustainable energy storage device based on NiCo2O4 nanoflakes via one step microwave irradiation 基于NiCo2O4纳米片一步微波辐照的可持续储能装置

IF 5.7 3区材料科学

Materials Research Bulletin Pub Date : 2025-07-17 DOI: 10.1016/j.materresbull.2025.113664

Bindu Mishra , P Sivaraman , Navinchandra Shimpi

{"title":"Sustainable energy storage device based on NiCo2O4 nanoflakes via one step microwave irradiation","authors":"Bindu Mishra , P Sivaraman , Navinchandra Shimpi","doi":"10.1016/j.materresbull.2025.113664","DOIUrl":"10.1016/j.materresbull.2025.113664","url":null,"abstract":"<div><div>NiCo<sub>2</sub>O<sub>4</sub> nanoflakes (NFs) were synthesized by microwave irradiation method. Characterization of the synthesized NiCo<sub>2</sub>O<sub>4</sub> NFs was done using XRD, FTIR, SAED, SEM, HR-TEM and XPS. The crystallite size calculated using Debye-Scherrer formula was found to be ∼7.86 and nanoflake morphology was confirmed using SEM/TEM. Electrochemical studies, including cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS), were conducted to evaluate the performance. In a three-electrode system, NiCo<sub>2</sub>O<sub>4</sub> NFs demonstrated a high specific capacitance of 932 F g⁻¹ at a scan rate of 5 mVs⁻¹ and retained 97.37% capacitance after 2000 cycles at 5 A g⁻¹. Asymmetric supercapacitor device (NiCo<sub>2</sub>O<sub>4</sub> ||6 M KOH|| AC) delivered a maximal energy density of 25.90 Wh Kg⁻¹ and power density of 96.92 W Kg⁻¹. Due to rapid redox activity and superior electron-ion transport, NiCo<sub>2</sub>O<sub>4</sub> NFs exhibited excellent properties for usage in high performance supercapacitors with exceptional power density.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"193 ","pages":"Article 113664"},"PeriodicalIF":5.7,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced supercapacitor performance with hierarchically porous SnO₂ embedded in reduced graphene oxide nanosheets 在还原氧化石墨烯纳米片中嵌入分层多孔SnO 2增强超级电容器性能

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-07-13 DOI: 10.1016/j.materresbull.2025.113662

Yaodong Guo , Hassan Idris Abdu , Hamouda Adam Hamouda , Omer Almamoun , Taslim Aboudou , Eman Shaiba Thani , Sefiu Abolaji Rasaki

{"title":"Enhanced supercapacitor performance with hierarchically porous SnO₂ embedded in reduced graphene oxide nanosheets","authors":"Yaodong Guo , Hassan Idris Abdu , Hamouda Adam Hamouda , Omer Almamoun , Taslim Aboudou , Eman Shaiba Thani , Sefiu Abolaji Rasaki","doi":"10.1016/j.materresbull.2025.113662","DOIUrl":"10.1016/j.materresbull.2025.113662","url":null,"abstract":"<div><div>This study presents hierarchically porous SnO₂ microspheres embedded in reduced graphene oxide (SnO₂/rGO-T) as high-performance supercapacitor electrodes. Synthesized via hydrothermal treatment with fluoride ions and annealing (300 °C/500 °C), the SnO₂/rGO-T structure leverages Ostwald ripening and high-energy crystal facets to optimize porosity and ion diffusion. Fluoride ions guide SnO₂ growth on ultrathin rGO nanosheets, forming uniform microspheres with enhanced conductivity. Annealing at 500 °C yields superior crystallinity and hierarchical structure, enabling SnO₂/rGO-500 to achieve a specific capacitance of 241 F/g (2 M KOH), energy density of 22.7 Wh/kg, and power density of 900 W/kg at 1 A/g, with 89.7 % capacitance retention after 10,000 cycles—outperforming SnO₂/rGO-300 and bare SnO₂. The synergy between rGO (preventing aggregation) and annealed SnO₂ (improving charge transfer) underpins this performance. This work offers a scalable, rational design strategy for SnO₂-rGO electrodes in energy storage applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"193 ","pages":"Article 113662"},"PeriodicalIF":5.3,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reducing urea consumption in hydrothermal synthesis of TiO2 with exposed (001) facets via steam splitting of layered titanate K2Ti2O5 通过蒸汽裂解层状钛酸盐K2Ti2O5减少水热合成暴露（001）面TiO2的尿素消耗

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-07-11 DOI: 10.1016/j.materresbull.2025.113660

Wenjing Xiang , Anwen Lv , Rui Sun , Chang Liu

{"title":"Reducing urea consumption in hydrothermal synthesis of TiO2 with exposed (001) facets via steam splitting of layered titanate K2Ti2O5","authors":"Wenjing Xiang , Anwen Lv , Rui Sun , Chang Liu","doi":"10.1016/j.materresbull.2025.113660","DOIUrl":"10.1016/j.materresbull.2025.113660","url":null,"abstract":"<div><div>While using urea as a substitute for HF in the hydrothermal treatment of titanates represents a more environmentally benign approach for synthesizing TiO<sub>2</sub> with high exposure of (001) facets, this method still necessitates substantial urea consumption. In this study, we demonstrate that pretreatment of K<sub>2</sub>Ti<sub>2</sub>O<sub>5</sub> with steam treatment followed by acid washing (yielding titanic acid 2TiH-mP, 225 m²/g) significantly reduces urea requirements during subsequent hydrothermal processing, compared to titanic acid obtained through direct acid washing of K<sub>2</sub>Ti<sub>2</sub>O<sub>5</sub> (2TiH, 19 m²/g). Hydrothermal treatment in 0.5 M urea at 200 °C for 24 h yielded titanium dio1xide with 47 % (001) facet exposure from 2TiH-mP, versus 27 % from 2TiH. The 2TiH-mP-derived crystals exhibited enhanced photocatalytic activity in methylene blue degradation, with optimal samples achieving 68 % (001) facet exposure. This performance enhancement is attributed to abundant unsaturated Ti5C sites on the (001) facets, which serve as highly active centers for adsorption and degradation processes.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"193 ","pages":"Article 113660"},"PeriodicalIF":5.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144634586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structure-luminescence correlation studies in Dy /Eu doped A2P2O7 (A = Ca/Sr/Ba and Zn) phosphors for white light generation Dy /Eu掺杂A2P2O7 （A = Ca/Sr/Ba和Zn）白光荧光粉的结构-发光相关性研究

IF 5.3 3区材料科学

Materials Research Bulletin Pub Date : 2025-07-11 DOI: 10.1016/j.materresbull.2025.113661

M. Parvathy , P.S. Ghosh , A. Arya , M. Sabeena

{"title":"Structure-luminescence correlation studies in Dy /Eu doped A2P2O7 (A = Ca/Sr/Ba and Zn) phosphors for white light generation","authors":"M. Parvathy , P.S. Ghosh , A. Arya , M. Sabeena","doi":"10.1016/j.materresbull.2025.113661","DOIUrl":"10.1016/j.materresbull.2025.113661","url":null,"abstract":"<div><div>Structure-luminescence correlation in Dy/Eu doped pyrophosphate materials (A<sub>2</sub>P<sub>2</sub>O<sub>7</sub>; <em>A</em> = Ca, Sr, Ba, Zn) is investigated, unveiling novel strategies for white light generation. The Hubbard corrected density functional theory (DFT+<em>U</em>) calculations reveal that Dy<sup>3+</sup> doping reduces the coordination number and metal-oxygen bond lengths. The local lattice distortions enhance the asymmetric crystal field, favoring <sup>4</sup>F<sub>9/2</sub> → <sup>6</sup>H<sub>15/2</sub>, <sup>6</sup>H<sub>13/2</sub> transitions corresponding to blue and yellow emissions following the <span><math><mrow><mn>4</mn><mi>f</mi><mi>→</mi><mn>5</mn><mi>d</mi><mi>→</mi><mn>4</mn><mi>f</mi></mrow></math></span> energy transfer pathway. The luminescence mechanism confirms that Eu²⁺ exhibits stronger hybridization with oxygen, yielding blue-green emission through the <span><math><mrow><mi>f</mi><mo>−</mo><mi>d</mi></mrow></math></span> transition, while Eu³⁺ contributes red-orange emission via <span><math><mrow><mi>f</mi><mo>−</mo><mi>f</mi></mrow></math></span> transitions. The Eu doped systems are more resistant to lattice strain than Dy doped ones, and structurally more perturbed due to smaller ionic radii and stronger Coulomb interactions. These findings predict the oxidation state variations based on structural constraints and offer deep insight into the electronic structure and luminescence behavior of pyrophosphate phosphors.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"193 ","pages":"Article 113661"},"PeriodicalIF":5.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0