Materials Research Bulletin最新文献_第6页

Fluorescence-based single-sensor platform using polymer-coated CdSe/ZnS quantum dots for discrimination of isoniazid, hydrazine, lactose, and pharmaceutical tablets 基于荧光的单传感器平台，利用聚合物包被CdSe/ZnS量子点对异烟肼、肼、乳糖和药物片剂进行鉴别

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-04-01 Epub Date: 2026-01-03 DOI: 10.1016/j.materresbull.2026.113990

Masoumeh Hasani, Fereshteh Emami

We present a single-sensor, fluorescence-based platform using amphiphilic polymer-coated CdSe/ZnS quantum dots (PMA-QDs) for detection of isoniazid (INH), hydrazine (HZ), lactose (LAC), their mixtures, and commercial tablet formulations. The PMA-QDs exhibit distinct fluorescence quenching patterns upon interaction with each analyte, creating unique molecular fingerprints. Chemometric analysis with principal component analysis (PCA), linear discriminant analysis (LDA), and hierarchical clustering analysis (HCA) enabled accurate discrimination of individual compounds, mixtures, and tablet formulations, achieving 100% classification in leave-one-out cross-validation. The system showed high sensitivity to hydrazine, a toxic INH metabolite, detecting its formation under thermal stress and simulated in vitro metabolism. Furthermore, PMA-QDs distinguished between commercial INH tablet brands, demonstrating potential for quality control. Correlations between redox potentials and quenching efficiencies were observed, providing insight into the sensing mechanism. This versatile, multiplexed approach offers a practical strategy for drug screening, diagnostics, and metabolite monitoring in complex matrices.

我们提出了一个单传感器、基于荧光的平台，使用两亲性聚合物包被的CdSe/ZnS量子点（PMA-QDs）检测异烟肼（INH）、肼（HZ）、乳糖（LAC）、它们的混合物和商业片剂配方。PMA-QDs在与每种分析物相互作用时表现出不同的荧光猝灭模式，形成独特的分子指纹图谱。主成分分析（PCA）、线性判别分析（LDA）和层次聚类分析（HCA）的化学计量学分析能够准确区分单个化合物、混合物和片剂配方，在留一交叉验证中实现100%分类。该系统对肼（一种有毒的INH代谢物）具有很高的敏感性，可以检测其在热应激下的形成并模拟体外代谢。此外，PMA-QDs区分了商业INH片剂品牌，显示了质量控制的潜力。观察到氧化还原电位和猝灭效率之间的相关性，从而深入了解感应机制。这种多功能、多路复用的方法为复杂基质中的药物筛选、诊断和代谢物监测提供了实用的策略。

{"title":"Fluorescence-based single-sensor platform using polymer-coated CdSe/ZnS quantum dots for discrimination of isoniazid, hydrazine, lactose, and pharmaceutical tablets","authors":"Masoumeh Hasani, Fereshteh Emami","doi":"10.1016/j.materresbull.2026.113990","DOIUrl":"10.1016/j.materresbull.2026.113990","url":null,"abstract":"<div><div>We present a single-sensor, fluorescence-based platform using amphiphilic polymer-coated CdSe/ZnS quantum dots (PMA-QDs) for detection of isoniazid (INH), hydrazine (HZ), lactose (LAC), their mixtures, and commercial tablet formulations. The PMA-QDs exhibit distinct fluorescence quenching patterns upon interaction with each analyte, creating unique molecular fingerprints. Chemometric analysis with principal component analysis (PCA), linear discriminant analysis (LDA), and hierarchical clustering analysis (HCA) enabled accurate discrimination of individual compounds, mixtures, and tablet formulations, achieving 100% classification in leave-one-out cross-validation. The system showed high sensitivity to hydrazine, a toxic INH metabolite, detecting its formation under thermal stress and simulated in vitro metabolism. Furthermore, PMA-QDs distinguished between commercial INH tablet brands, demonstrating potential for quality control. Correlations between redox potentials and quenching efficiencies were observed, providing insight into the sensing mechanism. This versatile, multiplexed approach offers a practical strategy for drug screening, diagnostics, and metabolite monitoring in complex matrices.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"197 ","pages":"Article 113990"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939283","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

Multiwavelength light emission of undoped SnO2 layers as a result of defect engineering 缺陷工程导致未掺杂SnO2层的多波长光发射

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-04-01 Epub Date: 2025-12-25 DOI: 10.1016/j.materresbull.2025.113978

Poting Liu , Anjana Baby , Anna Makarova , Mohammed Adel Aly , Stefan Brackmann , David C. Grinter , Pilar Ferrer , Martin Koch , Vaidas Klimkevičius , Vladimir Sivakov

Multiwavelength light emission was observed in undoped tin oxide thin films deposited by metal-organic chemical vapor deposition at temperatures ranging from 700 °C to 800 °C. This work presents the relationship between the presence and nature of defects in undoped SnO₂ thin films and their emission properties. Blue and orange emissions were observed on SnO₂ thin films using a He-Cd laser and an Xe lamp at an excitation wavelength of 325 nm, respectively. Systematic characterization and analysis techniques, including low-temperature photoluminescence at temperatures ranging from 77 K to 298 K and surface-sensitive techniques using brilliant synchrotron radiation facilities, were applied to elucidate the features and origin of emission in undoped SnO₂ layers. Based on our results, surface and bulk oxygen and interstitial tin defects play an important role in multi-wavelength emission processes and can be separately activated by controlling the applied light source.

用金属有机化学气相沉积法在700 ~ 800℃的温度范围内沉积了未掺杂的氧化锡薄膜，并观察到了多波长的光发射。本文研究了未掺杂氧化锡薄膜中缺陷的存在和性质与其发射特性之间的关系。在激发波长为325 nm的He-Cd激光器和Xe灯下，在SnO2薄膜上分别观察到蓝色和橙色的发射。采用系统的表征和分析技术，包括温度范围为77 K至298 K的低温光致发光技术和使用明亮同步辐射设备的表面敏感技术，阐明了未掺杂SnO2层的发射特征和起源。基于我们的研究结果，表面和体氧和间隙锡缺陷在多波长发射过程中起重要作用，并且可以通过控制外加光源分别激活。

{"title":"Multiwavelength light emission of undoped SnO2 layers as a result of defect engineering","authors":"Poting Liu , Anjana Baby , Anna Makarova , Mohammed Adel Aly , Stefan Brackmann , David C. Grinter , Pilar Ferrer , Martin Koch , Vaidas Klimkevičius , Vladimir Sivakov","doi":"10.1016/j.materresbull.2025.113978","DOIUrl":"10.1016/j.materresbull.2025.113978","url":null,"abstract":"<div><div>Multiwavelength light emission was observed in undoped tin oxide thin films deposited by metal-organic chemical vapor deposition at temperatures ranging from 700 °C to 800 °C. This work presents the relationship between the presence and nature of defects in undoped SnO<sub>2</sub> thin films and their emission properties. Blue and orange emissions were observed on SnO<sub>2</sub> thin films using a He-Cd laser and an Xe lamp at an excitation wavelength of 325 nm, respectively. Systematic characterization and analysis techniques, including low-temperature photoluminescence at temperatures ranging from 77 K to 298 K and surface-sensitive techniques using brilliant synchrotron radiation facilities, were applied to elucidate the features and origin of emission in undoped SnO<sub>2</sub> layers. Based on our results, surface and bulk oxygen and interstitial tin defects play an important role in multi-wavelength emission processes and can be separately activated by controlling the applied light source.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"197 ","pages":"Article 113978"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939282","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

Statistical physics, mechanisms, and reuse potential of an adsorbent from volcanic rock powder towards metals and dyes 火山岩粉末吸附剂对金属和染料吸附的统计物理、机理和再利用潜力

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-04-01 Epub Date: 2025-12-28 DOI: 10.1016/j.materresbull.2025.113983

Ana Carolina Ferreira Piazzi Fuhr , Jandira Leichtweis , Diovani Leindecker Rossato , Fernando Machado Machado , Salah Knani , Luis Felipe Oliveira Silva , Tito J. Crissien , Guilherme Luiz Dotto

In this study, an integrated approach was employed that combines experimental adsorption techniques with a theoretical analysis based on statistical physics models, allowing a structurally detailed interpretation of the interactions between the proposed adsorbent and the different classes of pollutants, as metals (Ag⁺_(aq) and Cu²⁺_(aq)), and organic dyes (acid green 16 and acid red 97). Maximum adsorption capacities reached 70.81 mg g⁻¹ for Ag⁺, 71.93 mg g⁻¹ for Cu²⁺, 197.01 mg g⁻¹ for acid green 16, and 194.33 mg g⁻¹ for acid red 97, confirming the material's high uptake potential. Adsorption energies confirmed physical adsorption mechanisms. The material achieved removal efficiencies of over 90% for all contaminants and retained more than 85% efficiency after 5 regeneration cycles. These findings demonstrate the potential of statistical physics models for the detailed characterization of molecular interactions in adsorption systems for metals and dyes, contributing to understanding the removal mechanisms of these emerging contaminants.

在这项研究中，采用了一种综合方法，将实验吸附技术与基于统计物理模型的理论分析相结合，允许对所提出的吸附剂与不同类别的污染物(如金属(Ag + （aq)和Cu + (aq)）和有机染料（酸绿16和酸红97）之间的相互作用进行结构上的详细解释。Ag +的最大吸附量为70.81 mg g⁻¹，Cu 2 +的最大吸附量为71.93 mg g⁻¹，酸绿16的最大吸附量为197.01 mg g⁻¹，酸红97的最大吸附量为194.33 mg g⁻¹，证实了该材料的高吸收潜力。吸附能证实了物理吸附机制。该材料对所有污染物的去除效率超过90%，并在5次再生循环后保持85%以上的效率。这些发现证明了统计物理模型在金属和染料吸附系统中分子相互作用的详细表征方面的潜力，有助于理解这些新兴污染物的去除机制。

{"title":"Statistical physics, mechanisms, and reuse potential of an adsorbent from volcanic rock powder towards metals and dyes","authors":"Ana Carolina Ferreira Piazzi Fuhr , Jandira Leichtweis , Diovani Leindecker Rossato , Fernando Machado Machado , Salah Knani , Luis Felipe Oliveira Silva , Tito J. Crissien , Guilherme Luiz Dotto","doi":"10.1016/j.materresbull.2025.113983","DOIUrl":"10.1016/j.materresbull.2025.113983","url":null,"abstract":"<div><div>In this study, an integrated approach was employed that combines experimental adsorption techniques with a theoretical analysis based on statistical physics models, allowing a structurally detailed interpretation of the interactions between the proposed adsorbent and the different classes of pollutants, as metals (Ag⁺<sub>(aq)</sub> and Cu²⁺<sub>(aq)</sub>), and organic dyes (acid green 16 and acid red 97). Maximum adsorption capacities reached 70.81 mg g⁻¹ for Ag⁺, 71.93 mg g⁻¹ for Cu²⁺, 197.01 mg g⁻¹ for acid green 16, and 194.33 mg g⁻¹ for acid red 97, confirming the material's high uptake potential. Adsorption energies confirmed physical adsorption mechanisms. The material achieved removal efficiencies of over 90% for all contaminants and retained more than 85% efficiency after 5 regeneration cycles. These findings demonstrate the potential of statistical physics models for the detailed characterization of molecular interactions in adsorption systems for metals and dyes, contributing to understanding the removal mechanisms of these emerging contaminants.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"197 ","pages":"Article 113983"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939379","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

Role of annealing temperature and Bi3+ doping concentration on the photoluminescence properties of La4Ga2O9 phosphor for high quantum yield 退火温度和Bi3+掺杂浓度对高量子产率La4Ga2O9荧光粉光致发光性能的影响

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-04-01 Epub Date: 2025-12-22 DOI: 10.1016/j.materresbull.2025.113971

Babiker M Jaffar , Vinod Kumar , R.E. Kroon , Rudolph M. Erasmus , Odireleng Martin Ntwaeaborwa

Enhanced blue photoluminescence was observed from La_4-xGa₂O₉:Bi_x powder phosphors prepared using a sol-gel combustion procedure with citric acid serving as the fuel. The doping concentration of Bi³⁺ was varied according to x = 0, 0.001, 0.005, 0.01, 0.015, 0.02, 0.025, and 0.03 and the materials were heated between 800 to 1400°C in air in increments of 100°C. X-ray diffraction analysis verified that the La₄Ga₂O₉ phosphors crystallized in a single monoclinic phase, suggesting that smaller concentrations of Bi³⁺ ions substituted La³⁺ without altering the main structure, a phenomenon attributed to their similar ionic radii. Diffuse reflectance spectroscopy indicated four absorption bands. Those located at 257 and 321 nm were assigned to transitions of Bi³⁺ ions, the band at 285 nm was due to defect states in Bi clusters, and the band near 230 nm was attributed to absorption above the band gap. The La₄Ga₂O₉ bandgap was determined from the reflectance data to be 5.16 eV. Under 321 nm excitation, a broad blue fluorescence was observed at 455 nm. The emission intensity varied with Bi³⁺ concentration with a maximum for the sample having x = 0.02. For this sample the internal and external quantum yields were 95% and 27%, respectively, suggesting potential for applications in the lighting industry.

以柠檬酸为燃料，采用溶胶-凝胶燃烧法制备了La4-xGa2O9:Bix粉末荧光粉。Bi3+的掺杂浓度分别为x = 0、0.001、0.005、0.01、0.015、0.02、0.025和0.03，材料在空气中以100℃的增量在800 ~ 1400℃之间加热。x射线衍射分析证实，La4Ga2O9荧光粉在单一单斜晶相中结晶，这表明较小浓度的Bi3+离子取代了La3+而没有改变其主要结构，这一现象归因于它们相似的离子半径。漫反射光谱显示出四个吸收带。257和321 nm为Bi3+离子跃迁，285 nm为Bi团簇缺陷态，230 nm为带隙以上吸收。根据反射率数据确定La4Ga2O9的带隙为5.16 eV。在321 nm激发下，在455nm处可见较宽的蓝色荧光。发射强度随Bi³+浓度的变化而变化，当样品x = 0.02时发射强度最大。对于该样品，内部和外部量子产率分别为95%和27%，表明在照明行业的应用潜力。

{"title":"Role of annealing temperature and Bi3+ doping concentration on the photoluminescence properties of La4Ga2O9 phosphor for high quantum yield","authors":"Babiker M Jaffar , Vinod Kumar , R.E. Kroon , Rudolph M. Erasmus , Odireleng Martin Ntwaeaborwa","doi":"10.1016/j.materresbull.2025.113971","DOIUrl":"10.1016/j.materresbull.2025.113971","url":null,"abstract":"<div><div>Enhanced blue photoluminescence was observed from La<sub>4-x</sub>Ga<sub>2</sub>O<sub>9</sub>:Bi<sub>x</sub> powder phosphors prepared using a sol-gel combustion procedure with citric acid serving as the fuel. The doping concentration of Bi<sup>3+</sup> was varied according to x = 0, 0.001, 0.005, 0.01, 0.015, 0.02, 0.025, and 0.03 and the materials were heated between 800 to 1400°C in air in increments of 100°C. X-ray diffraction analysis verified that the La<sub>4</sub>Ga<sub>2</sub>O<sub>9</sub> phosphors crystallized in a single monoclinic phase, suggesting that smaller concentrations of Bi<sup>3+</sup> ions substituted La<sup>3+</sup> without altering the main structure, a phenomenon attributed to their similar ionic radii. Diffuse reflectance spectroscopy indicated four absorption bands. Those located at 257 and 321 nm were assigned to transitions of Bi<sup>3+</sup> ions, the band at 285 nm was due to defect states in Bi clusters, and the band near 230 nm was attributed to absorption above the band gap. The La<sub>4</sub>Ga<sub>2</sub>O<sub>9</sub> bandgap was determined from the reflectance data to be 5.16 eV. Under 321 nm excitation, a broad blue fluorescence was observed at 455 nm. The emission intensity varied with Bi³⁺ concentration with a maximum for the sample having x = 0.02. For this sample the internal and external quantum yields were 95% and 27%, respectively, suggesting potential for applications in the lighting industry.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"197 ","pages":"Article 113971"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145881057","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

Novel sustainable choline chloride-free deep eutectic solvents: Preparation and physicochemical evaluation 新型可持续无氯化胆碱深度共晶溶剂：制备及理化评价

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-04-01 Epub Date: 2025-12-13 DOI: 10.1016/j.materresbull.2025.113948

Tahereh Javanmard, Morteza Jabbari, Sayyed Ahmad Nabavi-Amri, Azam Jabbari

Deep eutectic solvents (DESs), a class of liquid mixtures formed through strong hydrogen-bond interactions between a hydrogen bond acceptor (HBA) and a hydrogen bond donor (HBD), have emerged as environmentally friendly and versatile alternatives to conventional organic solvents. In the present study, several novel choline-chloride-free DESs (i.e., DESs prepared without using the conventional HBA choline chloride) were developed to provide more cost-effective and accessible options compared to traditional choline-chloride-based systems. The solvents were prepared by combining N,N-dimethylaniline hydrochloride, where the chloride anion (Cl^-) functions as the HBA, with urea, whose N–H groups act as the HBDs, at molar ratios of 2:1, 1:1, and 1:2. The prepared DESs were characterized using Differential Scanning Calorimetry (DSC) and Fourier-Transform Infrared Spectroscopy (FT-IR). DSC analysis confirmed significant melting-point depression relative to the pure constituents, while the FT-IR spectra confirmed hydrogen-bond formation, as evidenced by the redshift of the N-H stretching band of urea from 3448 cm^-1 to 3340-3200 cm^-1 in the prepared DESs and the shift of the C=O band from 1680 cm^-1 to approximately 1728-1732 cm^-1, accompanied by an increase in peak intensity. Furthermore, key physicochemical properties (including density, refractive index, specific conductivity, and dielectric constant) were measured at room temperature and atmospheric pressure. The results were interpreted based on variations in HBA/HBD molar ratios and the chemical nature of the starting components.

深共晶溶剂（DESs）是一类通过氢键受体（HBA）和氢键供体（HBD）之间的强氢键相互作用形成的液体混合物，已成为传统有机溶剂的环保和通用替代品。在本研究中，开发了几种新型的无氯胆碱DESs（即不使用传统的HBA氯化胆碱制备的DESs），与传统的氯胆碱系统相比，它们提供了更具成本效益和可获得的选择。溶剂由盐酸N，N-二甲基苯胺（氯阴离子Cl-）作为HBA，尿素（N- h基作为HBDs）按2:1,1:1和1:2的摩尔比合成。采用差示扫描量热法（DSC）和傅里叶变换红外光谱（FT-IR）对制备的DESs进行了表征。DSC分析证实了相对于纯组分的熔点明显下降，而FT-IR光谱证实了氢键的形成，制备的DESs中尿素的N-H拉伸带从3448 cm-1红移到3340-3200 cm-1， C=O波段从1680 cm-1红移到约1728-1732 cm-1，并伴有峰强度的增加。此外，在室温和常压下测量了关键的物理化学性质（包括密度、折射率、比电导率和介电常数）。结果是基于HBA/HBD摩尔比的变化和起始组分的化学性质来解释的。

{"title":"Novel sustainable choline chloride-free deep eutectic solvents: Preparation and physicochemical evaluation","authors":"Tahereh Javanmard, Morteza Jabbari, Sayyed Ahmad Nabavi-Amri, Azam Jabbari","doi":"10.1016/j.materresbull.2025.113948","DOIUrl":"10.1016/j.materresbull.2025.113948","url":null,"abstract":"<div><div>Deep eutectic solvents (DESs), a class of liquid mixtures formed through strong hydrogen-bond interactions between a hydrogen bond acceptor (HBA) and a hydrogen bond donor (HBD), have emerged as environmentally friendly and versatile alternatives to conventional organic solvents. In the present study, several novel choline-chloride-free DESs (i.e., DESs prepared without using the conventional HBA choline chloride) were developed to provide more cost-effective and accessible options compared to traditional choline-chloride-based systems. The solvents were prepared by combining N,N-dimethylaniline hydrochloride, where the chloride anion (Cl<sup>-</sup>) functions as the HBA, with urea, whose N–H groups act as the HBDs, at molar ratios of 2:1, 1:1, and 1:2. The prepared DESs were characterized using Differential Scanning Calorimetry (DSC) and Fourier-Transform Infrared Spectroscopy (FT-IR). DSC analysis confirmed significant melting-point depression relative to the pure constituents, while the FT-IR spectra confirmed hydrogen-bond formation, as evidenced by the redshift of the N-H stretching band of urea from 3448 cm<sup>-1</sup> to 3340-3200 cm<sup>-1</sup> in the prepared DESs and the shift of the C=O band from 1680 cm<sup>-1</sup> to approximately 1728-1732 cm<sup>-1</sup>, accompanied by an increase in peak intensity. Furthermore, key physicochemical properties (including density, refractive index, specific conductivity, and dielectric constant) were measured at room temperature and atmospheric pressure. The results were interpreted based on variations in HBA/HBD molar ratios and the chemical nature of the starting components.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"197 ","pages":"Article 113948"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798283","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

Synthesis of 2D WO3 nanosheets by confined growth on GO to enhance the photodegradation of organic contaminants in wastewater 氧化石墨烯限生法制备二维氧化钨纳米片，增强废水中有机污染物的光降解能力

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-04-01 Epub Date: 2025-12-02 DOI: 10.1016/j.materresbull.2025.113936

Druval Santos de Sá , Kelly Leite dos Santos Castro Assis , Carolina Carvalho de Mello , Victor Magno Paiva , Maybi Fálker Sampaio , Odivaldo Cambraia Alves , Adriana Maria da Silva , Eliane D'Elia , Braulio Soares Archanjo , Carlos Alberto Achete

The remarkable properties of tungsten oxide nanosheets (WO₃-NS), such as high specific surface area and preferentially exposed facets, renders them highly attractive photocatalytic nanomaterials for the degradation of organic contaminants. Nevertheless, conventional synthesis routes for the WO₃ nanosheets (WO₃-NS), face challenges with the production often limited to WO₃ nanoplates that do not fully exploit its surface properties. In this work, we report the successful synthesis of WO₃-NS using the confined growth approach on graphene oxide (GO) at temperatures ranging from 450 to 700 °C. WO₃-NS with a porous surface were successfully synthetized and applied to the photodegradation of methylene blue (MB) under visible, UV-A, and solar light. Kinetics studies of MB photodegradation with WO₃-NS/H₂O₂ revealed a degradation Deg (%) of 97-99% with k =0.026-0.070 min⁻¹ and excellent photostability over five cycles without no significant loss of photocatalytic activity. In addition, WO₃-NS-600 demonstrated broad-spectrum activity against other organic contaminants, including Rhodamine B (94 % in 60 min) and Tetracycline (88 % in 120 min. This study also provides insights into the WO₃ formation mechanism GO surfaces and underscores the promising performance of WO₃-NS for wastewater decontamination.

氧化钨纳米片（WO3-NS）具有高比表面积和优先暴露的表面等显著特性，使其成为降解有机污染物的极具吸引力的光催化纳米材料。然而，传统的WO3纳米片（WO3- ns）合成路线面临着挑战，其生产往往局限于WO3纳米片，不能充分利用其表面特性。在这项工作中，我们报告了在氧化石墨烯（GO）上使用限制生长方法在450至700°C的温度范围内成功合成了WO3-NS。成功合成了具有多孔表面的WO3-NS，并将其应用于可见光、UV-A和太阳光下对亚甲基蓝（MB）的光降解。WO3-NS/H2O2光降解MB的动力学研究表明，当k =0.026-0.070 min - 1时，降解度（%）为97-99%，并且在5个循环中具有良好的光稳定性，没有明显的光催化活性损失。此外，WO₃-NS-600对其他有机污染物表现出广谱活性，包括罗丹明B（60分钟94%）和四环素（120分钟88%）。该研究还揭示了氧化石墨烯表面WO3的形成机制，并强调了WO3- ns在废水净化方面的良好性能。

{"title":"Synthesis of 2D WO3 nanosheets by confined growth on GO to enhance the photodegradation of organic contaminants in wastewater","authors":"Druval Santos de Sá , Kelly Leite dos Santos Castro Assis , Carolina Carvalho de Mello , Victor Magno Paiva , Maybi Fálker Sampaio , Odivaldo Cambraia Alves , Adriana Maria da Silva , Eliane D'Elia , Braulio Soares Archanjo , Carlos Alberto Achete","doi":"10.1016/j.materresbull.2025.113936","DOIUrl":"10.1016/j.materresbull.2025.113936","url":null,"abstract":"<div><div><strong>The remarkable properties of t</strong>ungsten oxide nanosheets (WO<sub>3</sub>-NS), such as high specific surface area and preferentially exposed facets, renders them highly attractive photocatalytic nanomaterials for the degradation of organic contaminants. Nevertheless, conventional synthesis routes for the WO<sub>3</sub> nanosheets (WO<sub>3</sub>-NS), face challenges with the production often limited to WO<sub>3</sub> nanoplates that do not fully exploit its surface properties. In this work, we report the successful synthesis of WO<sub>3</sub>-NS using the confined growth approach on graphene oxide (GO) at temperatures ranging from 450 to 700 °C. WO<sub>3</sub>-NS with a porous surface were successfully synthetized and applied to the photodegradation of methylene blue (MB) under visible, UV-A, and solar light. Kinetics studies of MB photodegradation with WO<sub>3</sub>-NS/H<sub>2</sub>O<sub>2</sub> revealed a degradation Deg (%) of 97-99% with k =0.026-0.070 min<sup>−1</sup> and excellent photostability over five cycles without no significant loss of photocatalytic activity. In addition, WO₃-NS-600 demonstrated broad-spectrum activity against other organic contaminants, including Rhodamine B (94 % in 60 min) and Tetracycline (88 % in 120 min. This study also provides insights into the WO<sub>3</sub> formation mechanism GO surfaces and underscores the promising performance of WO<sub>3</sub>-NS for wastewater decontamination.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"197 ","pages":"Article 113936"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749682","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

Tungsten carbide/carbon composite as novel functional filler in polypropylene enables highly efficient γ-ray shielding 碳化钨/碳复合材料作为一种新型的功能性填料在聚丙烯中实现了高效的γ射线屏蔽

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-04-01 Epub Date: 2025-12-07 DOI: 10.1016/j.materresbull.2025.113944

Shuaida Song , Jie Zhao , Xiangjie Duan , Na Zhou , Jizhuang Fan , Bo Tian , Yunchen Du

Polymer-based composites attract increasing attention for γ-ray shielding because of their light weight, flexibility, and easy processing. In this study, tungsten carbide–carbon (WCC) with dual-scale characteristics, composed of ultrafine WC_1-x nanoparticles (3–4 nm) anchored on micrometer-scale carbon scaffolds, is incorporated into a polypropylene (PP) matrix to develop high-performance shielding materials. WCC possessing combined micro– and nano-scale features effectively mitigates nanoparticle agglomeration and enhances radiation attenuation across a wide energy range. Among the prepared composites, WCC45PP (45 wt % WCC) exhibits a linear attenuation coefficient (μ_L) of 3.597 cm^-1 and a radiation protection efficiency (RPE) of 48.3 % at 59.6 keV, while also showing superior mechanical and thermal stability compared with the composite containing commercial WC. These results indicate that WCC with dual-scale characteristics provides an effective strategy for designing lightweight, flexible, and lead-free polymer composites for γ-ray shielding applications.

聚合物基复合材料因其重量轻、柔韧性好、易于加工等优点，在γ射线屏蔽领域受到越来越多的关注。在本研究中，将具有双尺度特性的碳化钨-碳（WCC）纳米颗粒（3-4 nm）固定在微米尺度的碳支架上，将其掺入聚丙烯（PP）基体中，开发高性能屏蔽材料。WCC具有微纳米相结合的特点，有效地减轻了纳米颗粒的团聚，增强了宽能量范围内的辐射衰减。在制备的复合材料中，WCC45PP （45 wt % WCC）在59.6 keV下的线性衰减系数（μL）为3.597 cm-1，辐射防护效率（RPE）为48.3%，同时与含商用WC的复合材料相比，具有更好的机械稳定性和热稳定性。这些结果表明，具有双尺度特性的WCC为设计用于γ射线屏蔽应用的轻质、柔性和无铅聚合物复合材料提供了有效的策略。

{"title":"Tungsten carbide/carbon composite as novel functional filler in polypropylene enables highly efficient γ-ray shielding","authors":"Shuaida Song , Jie Zhao , Xiangjie Duan , Na Zhou , Jizhuang Fan , Bo Tian , Yunchen Du","doi":"10.1016/j.materresbull.2025.113944","DOIUrl":"10.1016/j.materresbull.2025.113944","url":null,"abstract":"<div><div>Polymer-based composites attract increasing attention for γ-ray shielding because of their light weight, flexibility, and easy processing. In this study, tungsten carbide–carbon (WCC) with dual-scale characteristics, composed of ultrafine WC<sub>1-x</sub> nanoparticles (3–4 nm) anchored on micrometer-scale carbon scaffolds, is incorporated into a polypropylene (PP) matrix to develop high-performance shielding materials. WCC possessing combined micro– and nano-scale features effectively mitigates nanoparticle agglomeration and enhances radiation attenuation across a wide energy range. Among the prepared composites, WCC45PP (45 wt % WCC) exhibits a linear attenuation coefficient (<em>μ</em><sub>L</sub>) of 3.597 cm<sup>-1</sup> and a radiation protection efficiency (RPE) of 48.3 % at 59.6 keV, while also showing superior mechanical and thermal stability compared with the composite containing commercial WC. These results indicate that WCC with dual-scale characteristics provides an effective strategy for designing lightweight, flexible, and lead-free polymer composites for γ-ray shielding applications.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"197 ","pages":"Article 113944"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749683","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

Promotion of Cd species on the electrocatalytic hydrogen evolution activity of two-dimensional molybdenite 镉对二维辉钼矿电催化析氢活性的促进作用

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-04-01 Epub Date: 2026-01-05 DOI: 10.1016/j.materresbull.2026.113992

Qinghong Han , Qingmiao Wang , Yue Wu , Si Wu , Yu Wang , Qing Ye , Shaoxian Song , Feifei Jia , Yanmei Li

The inert MoS₂ basal plane severely restricts its hydrogen evolution reaction (HER) activity. This work systematically compares three Cd-based modification strategies (doping, Cd-MoS₂; CdS heterojunction, CdS/MoS₂; atomic clusters, Cd/MoS₂) to activate the basal plane while retaining MoS₂’s layered structure. Taking into account both catalytic activity and stability, Cd-MoS₂ stands out with a ultralow overpotential of 113 mV at 10 mA·cm⁻², a Tafel slope of 62 mV·dec⁻¹, and robust long-term stability in alkaline media. DFT calculations confirm Cd optimizes ΔG_H* to near-zero, narrows the bandgap, and enhances Fermi-level electron density via Cd-MoS₂ orbital hybridization. This work uncovers Cd’s atomic-level modulation mechanism and provides a novel, comparative design blueprint for high-performance MoS₂-based HER catalysts. These findings offer a strategic framework for the rational development of MoS₂-based electrocatalysts for high-efficiency alkaline HER.

惰性的MoS 2基面严重限制了其析氢反应（HER）活性。本研究系统地比较了三种基于Cd的修饰策略（掺杂，Cd-MoS2； CdS异质结，Cd/MoS2；原子团簇，Cd/MoS2）来激活基面，同时保留MoS2的层状结构。考虑到催化活性和稳定性，Cd-MoS2在10 mA·cm - 2时的过电位为113 mV， Tafel斜率为62 mV·dec - 1，并且在碱性介质中具有强大的长期稳定性。DFT计算证实Cd优化ΔGH*接近零，缩小带隙，并通过Cd- mos2轨道杂化提高费米能级电子密度。这项工作揭示了Cd的原子级调制机制，并为高性能mos2基HER催化剂提供了一种新的、比较的设计蓝图。这些发现为合理开发基于mos2的高效碱性HER电催化剂提供了战略框架。

{"title":"Promotion of Cd species on the electrocatalytic hydrogen evolution activity of two-dimensional molybdenite","authors":"Qinghong Han , Qingmiao Wang , Yue Wu , Si Wu , Yu Wang , Qing Ye , Shaoxian Song , Feifei Jia , Yanmei Li","doi":"10.1016/j.materresbull.2026.113992","DOIUrl":"10.1016/j.materresbull.2026.113992","url":null,"abstract":"<div><div>The inert MoS₂ basal plane severely restricts its hydrogen evolution reaction (HER) activity. This work systematically compares three Cd-based modification strategies (doping, Cd-MoS<sub>2</sub>; CdS heterojunction, CdS/MoS<sub>2</sub>; atomic clusters, Cd/MoS<sub>2</sub>) to activate the basal plane while retaining MoS<sub>2</sub>’s layered structure. <strong>Taking into account both catalytic activity and stability</strong>, Cd-MoS<sub>2</sub> stands out with a ultralow overpotential of 113 mV at 10 mA·cm⁻<sup>2</sup>, a Tafel slope of 62 mV·dec⁻<sup>1</sup>, and robust long-term stability in alkaline media. DFT calculations confirm Cd optimizes ΔG<sub>H*</sub> to near-zero, narrows the bandgap, and enhances Fermi-level electron density via Cd-MoS<sub>2</sub> orbital hybridization. This work uncovers Cd’s atomic-level modulation mechanism and provides a novel, comparative design blueprint for high-performance MoS<sub>2</sub>-based HER catalysts. These findings offer a strategic framework for the rational development of MoS<sub>2</sub>-based electrocatalysts for high-efficiency alkaline HER.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"197 ","pages":"Article 113992"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145939288","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

Chemical reengineering of waste polyester-cotton blends with comprehensive sustainability assessment 废涤棉混纺的化学再造及综合可持续性评价

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-04-01 Epub Date: 2025-12-26 DOI: 10.1016/j.materresbull.2025.113979

Tian Tian , Xinyu Wang , Xinglin Liu , Wang Liao , De-Yi Wang

The large amount of textiles has caused a serious environmental burden. Creative methods should be proposed to solve the long-standing unresolved problem. Herein, waste polyester-cotton blend (PCB) are converted into robust and flame-resistant composite aerogels under the light of ‘Chemical Reengineering’. The compression modulus of the resulting aerogel is up to 23.9 MPa with corresponding specific modulus of 69.92 m²/s². The in-situ introduction of magnesium-aluminium layered double hydroxide (MgAl LDH) in PCB gel decreases the peak heat release rate (PHRR) by 91.6% and extends the time to peak heat release (tPHRR) to 115 s. Simultaneously, terephthalic acid (TPA) is effectively recovered with a purity as high as 99.7%. Furthermore, a comprehensive sustainability assessment with 4 rating parameters is promoted to evaluate and compare recent recycling methods.

大量的纺织品造成了严重的环境负担。应该提出创造性的方法来解决长期未解决的问题。在此，废弃的涤棉混纺（PCB）在“化学再造”的光下转化为坚固耐用的阻燃复合气凝胶。所得气凝胶的压缩模量高达23.9 MPa，相应的比模量为69.92 m2/s2。原位引入镁铝层状双氢氧化物（MgAl LDH）可使PCB凝胶的释热速率降低91.6%，达到释热峰值的时间延长至115 s。同时，对苯二甲酸（TPA）可有效回收，纯度高达99.7%。在此基础上，提出了一种包含4个评价参数的综合可持续性评价方法，以评价和比较最近的回收方法。

引用次数: 0

A dual-mode magnetic–luminescent hybrid: Fe3O4 + Y2O3:Yb3+,Tm3+ decorated with a Eu3+β-diketonate complex Fe3O4 + Y2O3:Yb3+，Tm3+饰有Eu3+β-二酮酸配合物的双模磁发光杂化体

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin

Pub Date : 2026-04-01 Epub Date: 2025-12-09 DOI: 10.1016/j.materresbull.2025.113943

André Lucas Costa , Clara Johanna Pacheco , Julieth Caro Patiño , Angelo Márcio de Souza Gomes , Flavia Artizzu , Sergio Antonio Marques Lima , Airton Germano Bispo-Jr , Ana Maria Pires

We report the fabrication of multifunctional core@shell nanostructures integrating photonic and magnetic properties via a stepwise synthetic approach. The Fe₃O₄ + Y₂O₃:Yb,Tm@SiO₂ hybrid was prepared through co-precipitation, homogeneous precipitation with urea, and silica coating, followed by functionalization with isocyanate groups. Subsequent coupling with 4-(aminomethyl)benzoic acid (pamba) enabled Eu³⁺ coordination through carboxylate moieties. Finally, the β-diketonate ligand 1-(4-chlorophenyl)-4,4,4-trifluoro-1,3-butanedione (4-Cl-btfa) was coordinated to Eu³⁺, promoting efficient ligand-to-metal energy transfer. The resulting nanostructure exhibited a saturation magnetization of 0.58 emu g⁻¹ with negligible coercivity, consistent with related systems. Under 980 nm excitation (1500 mW), bright blue upconversion emission from Yb³⁺/Tm³⁺ in the Y₂O₃ matrix was observed. In contrast, ultraviolet excitation (335 nm) produced intense red emission with an absolute quantum yield of 12.7 %, arising from Eu³⁺ β-diketonate complexes on the surface. These findings demonstrate tunable emission behavior depending on excitation wavelength and highlight the potential of rational core@shell assembly for multifunctional nanoplatforms.

我们报道了一种集成光子和磁性质的多功能core@shell纳米结构的逐步合成方法。通过共沉淀、尿素均匀沉淀、二氧化硅包覆、异氰酸基官能团化制备Fe3O4 + Y2O3:Yb，Tm@SiO2杂化物。随后与4-（氨基甲基）苯甲酸（pamba）偶联使Eu3+通过羧酸基团进行配位。最后，β-二酮酸配体1-（4-氯苯基）-4,4,4-三氟-1,3-丁二酮（4- cl -btfa）与Eu3+配位，促进了配体到金属的高效能量转移。所得纳米结构的饱和磁化强度为0.58 emu g−1，矫顽力可以忽略不计，与相关体系一致。在980 nm （1500 mW）激发下，Yb3+/Tm3+在Y2O3基体中产生亮蓝色上转换发光。相比之下，紫外光激发（335 nm）产生了强烈的红色发射，绝对量子产率为12.7%，这是由表面的Eu3+ β-二酮酸配合物引起的。这些发现证明了可调谐的发射行为取决于激发波长，并强调了合理的core@shell组装多功能纳米平台的潜力。

{"title":"A dual-mode magnetic–luminescent hybrid: Fe3O4 + Y2O3:Yb3+,Tm3+ decorated with a Eu3+β-diketonate complex","authors":"André Lucas Costa , Clara Johanna Pacheco , Julieth Caro Patiño , Angelo Márcio de Souza Gomes , Flavia Artizzu , Sergio Antonio Marques Lima , Airton Germano Bispo-Jr , Ana Maria Pires","doi":"10.1016/j.materresbull.2025.113943","DOIUrl":"10.1016/j.materresbull.2025.113943","url":null,"abstract":"<div><div>We report the fabrication of multifunctional core@shell nanostructures integrating photonic and magnetic properties via a stepwise synthetic approach. The Fe<sub>3</sub>O<sub>4</sub> + Y<sub>2</sub>O<sub>3</sub>:Yb,Tm@SiO<sub>2</sub> hybrid was prepared through co-precipitation, homogeneous precipitation with urea, and silica coating, followed by functionalization with isocyanate groups. Subsequent coupling with 4-(aminomethyl)benzoic acid (pamba) enabled Eu<sup>3+</sup> coordination through carboxylate moieties. Finally, the β-diketonate ligand 1-(4-chlorophenyl)-4,4,4-trifluoro-1,3-butanedione (4-Cl-btfa) was coordinated to Eu<sup>3+</sup>, promoting efficient ligand-to-metal energy transfer. The resulting nanostructure exhibited a saturation magnetization of 0.58 emu g<sup>−1</sup> with negligible coercivity, consistent with related systems. Under 980 nm excitation (1500 mW), bright blue upconversion emission from Yb<sup>3+</sup>/Tm<sup>3+</sup> in the Y<sub>2</sub>O<sub>3</sub> matrix was observed. In contrast, ultraviolet excitation (335 nm) produced intense red emission with an absolute quantum yield of 12.7 %, arising from Eu<sup>3+</sup> β-diketonate complexes on the surface. These findings demonstrate tunable emission behavior depending on excitation wavelength and highlight the potential of rational core@shell assembly for multifunctional nanoplatforms.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"197 ","pages":"Article 113943"},"PeriodicalIF":5.7,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145798291","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