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Facile Fabrication of LaFeO3 Supported Pd Nanoparticles as Highly Effective Heterogeneous Catalyst for Suzuki–Miyaura Coupling Reaction 简便制备 LaFeO3 Supported Pd 纳米粒子,作为铃木-宫浦偶联反应的高效异构催化剂
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2024-10-27 DOI: 10.1002/cnma.202400450
Ying Sun, Juanjuan Yin, Ying Wang, Ping Zhang, Lingjuan Ma, Jisen Li
{"title":"Facile Fabrication of LaFeO3 Supported Pd Nanoparticles as Highly Effective Heterogeneous Catalyst for Suzuki–Miyaura Coupling Reaction","authors":"Ying Sun,&nbsp;Juanjuan Yin,&nbsp;Ying Wang,&nbsp;Ping Zhang,&nbsp;Lingjuan Ma,&nbsp;Jisen Li","doi":"10.1002/cnma.202400450","DOIUrl":"https://doi.org/10.1002/cnma.202400450","url":null,"abstract":"<p>Supported Pd catalysts have been widely studied due to their enormous potential as candidates for heterogeneous Suzuki–Miyaura coupling reactions. However, the sintering and low activity of active sites still remain challenges. A vesicle-shaped LaFeO<sub>3</sub>-supported Pd catalyst (I−Pd/LaFeO<sub>3</sub>) was successfully fabricated using the impregnation method and tested for the Suzuki–Miyaura coupling reaction. Compared to P−Pd/LaFeO<sub>3</sub> prepared with photo-deposition and Pd/Al<sub>2</sub>O<sub>3</sub> prepared with impregnation, the I−Pd/LaFeO<sub>3</sub> catalyst exhibits significantly higher catalytic activity, stability, and reusability. The chemical composition and electron states of different Pd-based catalysts were well studied based on various characterizations and the results indicated that the excellent performance of I−Pd/LaFeO<sub>3</sub> can be attributed to its unique nanostructure and the strong interactions between LaFeO<sub>3</sub> and palladium nanoparticles. The impregnation method and the choice of the LaFeO<sub>3</sub> support show a great influence on the electronic properties of Pd species, their reducibility, and, consequently, their reaction behavior. This unique LaFeO<sub>3</sub> supported Pd catalyst provided an environmentally friendly heterogeneous method for the Suzuki–Miyaura coupling reaction.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 12","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Dynamic pH-Responsive Release and Biological Impact of In Situ Quercetin-Modified MIL-101(Fe)-NH2
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2024-10-27 DOI: 10.1002/cnma.202400197
Ghina Alya Nabilah, Roshid Adi Nugroho, Dendy Dendy, Murni Handayani, Caecilia Sukowati, Claudio Tiribelli, Saveria Lory Crocè, Witri Wahyu Lestari
{"title":"Dynamic pH-Responsive Release and Biological Impact of In Situ Quercetin-Modified MIL-101(Fe)-NH2","authors":"Ghina Alya Nabilah,&nbsp;Roshid Adi Nugroho,&nbsp;Dendy Dendy,&nbsp;Murni Handayani,&nbsp;Caecilia Sukowati,&nbsp;Claudio Tiribelli,&nbsp;Saveria Lory Crocè,&nbsp;Witri Wahyu Lestari","doi":"10.1002/cnma.202400197","DOIUrl":"https://doi.org/10.1002/cnma.202400197","url":null,"abstract":"<p>A successful investigation was conducted on the <i>in situ</i> modification of MIL-101(Fe)-NH<sub>2</sub> with quercetin and its controlled release under various pH conditions. MIL-101(Fe)-NH<sub>2</sub> was synthesized using an electrochemical method at room temperature (15 volts, 30 min). The formation of the material was confirmed through comprehensive analyses, including PXRD, FTIR, and TGA. Nitrogen sorption isotherm measurements revealed that Qu@MIL-101(Fe)-NH<sub>2</sub> exhibited a smaller surface area compared to MIL-101(Fe)-NH<sub>2</sub>, with both materials classified as mesoporous. Transmission electron microscopy (TEM) clearly depicted the materials’ octahedral microspindle morphology. The cumulative percent release (CPR) of quercetin from Qu@MIL-101(Fe)-NH<sub>2</sub> over 72 h was determined to be 53.45 % at pH 1.2, 19.48 % at pH 4.8, and 5.87 % at pH 7.4. Notably, quercetin release in the acidic microenvironment representative of cancer cells (pH 4.8) was nearly four times higher than under physiological conditions (pH 7.4). Kinetic release studies indicated that quercetin release from Qu@MIL-101(Fe)-NH<sub>2</sub> followed the Ritger-Peppas kinetic model, suggesting non-Fickian diffusion. The MIL-101(Fe)-NH<sub>2</sub> nanocarriers, with <i>in situ</i>-loaded quercetin, demonstrated promising potential for pH-triggered drug release. Additionally, the safety of MIL-101(Fe)-NH<sub>2</sub> in biological models and the anticancer efficacy of quercetin were evaluated in vitro using two liver cancer cell lines.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143120141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Effect of Electric Field on Carbon Encapsulation and Catalytic Activity of Pd for Efficient Formic Acid Decomposition 电场对碳包封及Pd高效分解甲酸催化活性的影响
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2024-10-25 DOI: 10.1002/cnma.202400411
Jiangnan Guo, Shuozhen Hu, Xinsheng Zhang, Shigang Sun
{"title":"Effect of Electric Field on Carbon Encapsulation and Catalytic Activity of Pd for Efficient Formic Acid Decomposition","authors":"Jiangnan Guo,&nbsp;Shuozhen Hu,&nbsp;Xinsheng Zhang,&nbsp;Shigang Sun","doi":"10.1002/cnma.202400411","DOIUrl":"https://doi.org/10.1002/cnma.202400411","url":null,"abstract":"<p>Utilizing carbon coated ferroelectric materials to introduce polarization-induced electric field (PIEF) stimulates research of electric field-assisted catalysts for various reactions. However, effect of PIEF on carbon coating mechanism has not been studied. Herein, tourmaline nanoparticles (TNPs) with spontaneous dipole moments were applied as the PIEF supplier and sucrose was utilized as the carbon precursor to synthesize carbon coated TNPs (TNP@SC) to uncover the influence of PIEF on the carbon coating and catalytic activity of Pd toward formic acid decomposition (FAD). PIEF enhanced the adsorption capacity of TNPs for the caramelized intermediate species and increased H<sup>+</sup> concentration by facilitating water ionization. Polymerization of adsorbed caramelized intermediate species on TNPs was accelerated. Uniformly coated carbon layer with more defects, larger specific surface area, and higher porosity was coated on TNP. Such surface properties of the carbon layer were beneficial for strongly anchoring ultrafine Pd nanoparticles. Owing to the specific properties of carbon layer and existence of PIEF, Pd/TNP@SC exhibited higher FAD activity than the catalysts absent of PIEF. Stronger PIEF leaded to higher initial turnover frequency. This study provides guidance to supply electric field for catalysis.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 12","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Two-Dimensional Metal Covalent Organic Polymers with Dirhodium(II) Photoreduction Centers for Efficient Nitrogen Fixation 具有二铑(II)光还原中心的二维金属共价有机聚合物用于高效固氮
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2024-10-24 DOI: 10.1002/cnma.202400462
Qian-Qian Qiu, Wang-Kang Han, Ruo-Meng Zhu, Yong Liu, Jia-Xing Fu, Zhi-Guo Gu
{"title":"Two-Dimensional Metal Covalent Organic Polymers with Dirhodium(II) Photoreduction Centers for Efficient Nitrogen Fixation","authors":"Qian-Qian Qiu,&nbsp;Wang-Kang Han,&nbsp;Ruo-Meng Zhu,&nbsp;Yong Liu,&nbsp;Jia-Xing Fu,&nbsp;Zhi-Guo Gu","doi":"10.1002/cnma.202400462","DOIUrl":"https://doi.org/10.1002/cnma.202400462","url":null,"abstract":"<p>Photocatalytic nitrogen fixation is a green method for converting N<sub>2</sub> to NH<sub>3</sub>, but it remains a challenging task due to the lack of effective photocatalysts. Herein, a series of porous metal covalent organic polymers (MCOPs) with the integration of dinuclear rhodium(II) catalytic centers were rationally constructed for photocatalytic N<sub>2</sub> fixation. Interestingly, the porous MCOPs had double-layers two-dimensional (2D) structures with the coordinated Rh(II) as the point of registry. The photocatalytic experiment showed that Rh-TAPA with significant donor-acceptor (D−A) features exhibited a high activity toward NH<sub>3</sub> production with a rate of 319.8 μmol g<sup>−1</sup> h<sup>−1</sup>. The electron transfer process, N<sub>2</sub> adsorption and activation mechanism of RhCOPs were further investigated through comprehensive characterization, including DFT calculations and in situ characterization. This work provided a valuable insight into the photocatalytic N<sub>2</sub> fixation process with porous materials.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 12","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142861957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Advanced Research on Graphene-Based Nano-Materials: Synthesis, Structure, Dispersibility and Tribological Applications
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2024-10-24 DOI: 10.1002/cnma.202400428
Kang Yang, Hongliang Chen, Zhenjie Li, Yaqiong Wang, Boliang Li, Chengyu Wang, Shuaichao Qiu, Fan Chen
{"title":"Advanced Research on Graphene-Based Nano-Materials: Synthesis, Structure, Dispersibility and Tribological Applications","authors":"Kang Yang,&nbsp;Hongliang Chen,&nbsp;Zhenjie Li,&nbsp;Yaqiong Wang,&nbsp;Boliang Li,&nbsp;Chengyu Wang,&nbsp;Shuaichao Qiu,&nbsp;Fan Chen","doi":"10.1002/cnma.202400428","DOIUrl":"https://doi.org/10.1002/cnma.202400428","url":null,"abstract":"<p>In recent years, graphene-based nanomaterials have attracted extensive attention because of their excellent physical and chemical properties, such as high strength, high conductivity, high thermal conductivity and excellent lubrication performance. Here, the latest research progress of graphene-based nanomaterials is reviewed in this paper, and their synthesis method, unique structure, dispersion improvement strategy and wide application in tribology are emphatically discussed. Graphene-based materials are synthesized by typical chemical vapor deposition and reduced graphene oxide, showing nanoporous structure characteristics and excellent layered structure. Furthermore, through adjusting the chemical structure for the material, the graphene-based materials with specific lubricating properties can be designed to meet the use requirements under different working conditions. In view of the easy agglomeration of graphene, physical and chemical dispersion methods, such as in-situ polymerization and functionalization treatment, were introduced, which significantly improved its dispersibility in the matrix. In tribology, graphene-based nanocomposites present the excellent anti-friction and anti-wear properties, which effectively reduce the coefficient of friction and prolong the service life of materials with forming the stable lubricating films. The summary for graphene-based materials provides theoretical basis and technical support for applications in high-end manufacturing, energy storage, and protective coatings.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143119083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Efficient Dendritic Cell Activation by a Layered Double Hydroxide-Loaded Dual Adjuvant Cocktail
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2024-10-23 DOI: 10.1002/cnma.202400472
Yi Jiang, Chenglun Tang, Yilun Wu, Yishen Zhu
{"title":"Efficient Dendritic Cell Activation by a Layered Double Hydroxide-Loaded Dual Adjuvant Cocktail","authors":"Yi Jiang,&nbsp;Chenglun Tang,&nbsp;Yilun Wu,&nbsp;Yishen Zhu","doi":"10.1002/cnma.202400472","DOIUrl":"https://doi.org/10.1002/cnma.202400472","url":null,"abstract":"<p>One of the main goals of present vaccine investigations is to develop a potent and efficient adjuvant strategy. The combination of multiple agonists to different pattern recognition receptor families offers great opportunities to achieve strong immune responses in a synergy manner. Here, we employed layered double hydroxide nanomaterials with BSA coating (LB) to integrate CpG and 3pRNA dual adjuvant cocktail, together with ovalbumin antigen. With LB loading, CpG and 3pRNA led to a quick internalization and enhanced induction of dendritic cell (DC) maturation. Meanwhile, this nanoadjuvant cocktail facilitated antigen crosspresenting in activated DCs. Taken together, these results may inspire the investigation of agonists combination and LDH-based nanoadjuvants.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"11 2","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Investigation On Barrier Layers Of PT/BaTiO3/PT Based Thin Film Capacitors 基于 PT/BaTiO3/PT 的薄膜电容器阻隔层研究
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2024-10-22 DOI: 10.1002/cnma.202400316
P. S. Smitha, V. Suresh Babu, M. K. Asmin
{"title":"Investigation On Barrier Layers Of PT/BaTiO3/PT Based Thin Film Capacitors","authors":"P. S. Smitha,&nbsp;V. Suresh Babu,&nbsp;M. K. Asmin","doi":"10.1002/cnma.202400316","DOIUrl":"https://doi.org/10.1002/cnma.202400316","url":null,"abstract":"<p>Barium titanate is a ferroelectric material used as a dielectric in thin film capacitors owing to its high dielectric constant. Barrier layers are utilized in these capacitors to improve the capacitors’ performance by controlling the microstructure and creating thin resistive films. In this paper, the effect of barrier layers in Pt/BT/Pt capacitors is studied using zinc oxide and aluminium oxide. The performance parameters such as capacitance density, leakage current, equivalent series resistance, dielectric loss and dielectric strength of Pt/BT/Pt thin film capacitors with barrier layers of different sizes are simulated using COMSOL Multiphysics modeling software. 2 nm thick aluminum oxide as Pt - BT barrier layer gives optimal performance. The leakage current, dielectric loss, capacitance density, equivalent series resistance and dielectric strength of Pt/BT/Pt capacitor are found to be 0.519 mA, 9.62×10<sup>−12</sup>, 172.8 fF/μm<sup>2</sup>, 9.62 kΩ, 10<sup>8</sup> V/m respectively whereas that of Pt/ALO/BT/ALO/Pt capacitor are found to be 1.56×10<sup>−18</sup> A, 7.81×10<sup>−18</sup>, 11.6 fF/μm<sup>2</sup>, 9.01×10<sup>15</sup> Ω, 5.05×10<sup>9</sup> V/m respectively. The low capacitance in Pt/ALO/BT/ALO/Pt capacitor is due to the low dielectric constant of aluminium dioxide barrier layer. The reduced leakage current and increased equivalent series resistance is due to the low conductivity of the aluminium oxide barrier layer. The use of aluminium oxide barrier layer between the conductive surfaces can reduce the electric field and increase the breakdown voltage, leading to improved dielectric strength and reduced dielectric loss.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 12","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142862041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Construction of PtAg-on-Au Heterostructured Nanoplates for Improved Electrocatalytic Activity of Formic Acid Oxidation 构建 PtAg-on-Au 异质结构纳米板以提高甲酸氧化的电催化活性
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2024-10-21 DOI: 10.1002/cnma.202400399
Quansen Wu, Yuanyuan Min, Yingying Wang, Yanyun Ma, Yiqun Zheng
{"title":"Construction of PtAg-on-Au Heterostructured Nanoplates for Improved Electrocatalytic Activity of Formic Acid Oxidation","authors":"Quansen Wu,&nbsp;Yuanyuan Min,&nbsp;Yingying Wang,&nbsp;Yanyun Ma,&nbsp;Yiqun Zheng","doi":"10.1002/cnma.202400399","DOIUrl":"https://doi.org/10.1002/cnma.202400399","url":null,"abstract":"<p>Direct formic acid fuel cells have attracted significant attention due to their low fuel crossover, high safety, and high theoretical power density among all proton-exchange membrane fuel cells. Numerous efforts have been dedicated to studying formic acid oxidation, particularly in the fabrication of high-performance electrocatalysts with economical utilization of Pt metal. In this work, we report a synthetic strategy to create PtAg dots supported on plate-like Au nanoparticles and explore their applications in electrocatalytic formic acid oxidation. The highly dispersed nature of the catalytic Pt centers and the successful construction of PtAg−Au trimetallic interfaces makes the current nanostructure an ideal system to allow for a synergetic effect between Pt, Au, and Ag, leading to improved electrocatalysis. Compared with commercial Pt/C, our PtAg-on-Au heterogenous nanoplates exhibit superior mass activity, along with enhanced reaction kinetics and long-term durability for FAOR in an acidic medium. Density functional theory (DFT) simulation results indicate that AgPtAu(111) exhibits a relatively high activity for HCOOH oxidation into CO<sub>2</sub> among the various Au-based catalysts. This work provides a viable strategy for constructing Pt-based electrocatalysts with controlled Pt ensembles, offering insights into the development of fuel cell catalysts that make highly efficient use of costly noble metals.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 11","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
New Ceramic Material Y2-xVxO3+x – Mechanochemical Synthesis and Some Physicochemical Properties 新型陶瓷材料 Y2-xVxO3+x - 机械化学合成及某些物理化学特性
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2024-10-18 DOI: 10.1002/cnma.202400337
Mateusz Piz, Elżbieta Filipek, Kamil Kwiatkowski, Piotr Dulian, Wojciech Bąk, Rafał J. Wróbel
{"title":"New Ceramic Material Y2-xVxO3+x – Mechanochemical Synthesis and Some Physicochemical Properties","authors":"Mateusz Piz,&nbsp;Elżbieta Filipek,&nbsp;Kamil Kwiatkowski,&nbsp;Piotr Dulian,&nbsp;Wojciech Bąk,&nbsp;Rafał J. Wróbel","doi":"10.1002/cnma.202400337","DOIUrl":"https://doi.org/10.1002/cnma.202400337","url":null,"abstract":"<p>Potential applications of known compounds from the V<sub>2</sub>O-Y<sub>2</sub>O<sub>3</sub> system, i. e. YVO<sub>4</sub>, Y<sub>8</sub>V<sub>2</sub>O<sub>17</sub> and Y<sub>10</sub>V<sub>2</sub>O<sub>20</sub>, were the inspiration to undertake research, the main goal of which was to determine whether unknown phases of the solid solution type are formed in this system. Solid solutions are still sought-after phases because their properties depend on their chemical composition. In this work it was experimentally demonstrated that a new substitute solid solution with the formula Y<sub>2-x</sub>V<sub>x</sub>O<sub>3+x</sub> (0.00&lt;×&lt;0.60) is formed from mixtures of V<sub>2</sub>O<sub>5</sub> with Y<sub>2</sub>O<sub>3</sub> as a result of mechanochemical synthesis. Its properties were examined by using, i.a. XRD (X-ray diffraction) and UV-Vis-DRS (ultraviolet-visible light spectroscopy with diffusion reflectance) methods. It was found among other things, that it crystallizes in a regular system, exhibits a Y<sub>2</sub>O<sub>3</sub> structure and is thermally stable up to at least 800 °C (for x=0.40). Moreover, the estimated value of the band gap width indicated that the solid solution Y<sub>2-x</sub>V<sub>x</sub>O<sub>3+x</sub> belongs to the class of semiconductors. The study of dielectric properties of new phase was performed by means of broadband dielectric spectroscopy. The obtained measurement data showed the presence of relaxation type dielectric mechanisms. The thermally activation energies of the relaxation processes related to the electric conductivity were calculated.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 11","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Fluorescent “On-Off-On” Probe for Cascade Detection of Ag(I) and Ascorbic Acid Using Folic Acid Protected Copper Nanoclusters 使用叶酸保护铜纳米团簇级联检测 Ag(I) 和抗坏血酸的荧光 "开-关-开 "探针
IF 2.6 4区 材料科学
ChemNanoMat Pub Date : 2024-10-17 DOI: 10.1002/cnma.202400300
Yagnik Vegad, Lata Rana, Bigyan Ranjan Jali, Suban K. Sahoo
{"title":"Fluorescent “On-Off-On” Probe for Cascade Detection of Ag(I) and Ascorbic Acid Using Folic Acid Protected Copper Nanoclusters","authors":"Yagnik Vegad,&nbsp;Lata Rana,&nbsp;Bigyan Ranjan Jali,&nbsp;Suban K. Sahoo","doi":"10.1002/cnma.202400300","DOIUrl":"https://doi.org/10.1002/cnma.202400300","url":null,"abstract":"<p>Folic acid (FA) protected copper nanoclusters (FA-CuNCs, λ<sub>ex</sub>=350 nm, λ<sub>em</sub>=445 nm) were synthesized and used as a fluorescent “on-off-on” probe for the cascade detection of Ag<sup>+</sup> and ascorbic acid (AA). The fluorescence emission of FA-CuNCs at 445 nm was quenched significantly by Ag<sup>+</sup> due to the analyte-induced aggregation followed by the formation of larger nanoparticles. However, when AA was added to the <i>in-situ</i> generated Ag@FA-CuNCs, the fluorescence emission of FA-CuNCs was recovered at 445 nm because of the AA-directed reduction of Ag<sup>+</sup> to Ag<sup>0</sup>. The experimental conditions, such as pH, incubation time, and quencher Ag<sup>+</sup> concentrations, were optimized to achieve improved sensitivity. The detection limit for Ag<sup>+</sup> and AA was estimated as 37.1 nM and 0.27 μM with a linearity range of 2.49–22 μM and 4.71–81.53 μM, respectively. In real sample analysis, the recoveries of Ag<sup>+</sup> ions in river water and AA in orange juice samples were found between 99–93 % and 97–94 % using the probes FA-CuNCs and Ag@FA-CuNCs, respectively. Overall, this work offers a viable method for the sequential detection of Ag<sup>+</sup> and AA using FA-CuNCs via a fluorescence “on-off-on” switch mechanism.</p>","PeriodicalId":54339,"journal":{"name":"ChemNanoMat","volume":"10 12","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142861849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
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