Functional Materials Letters最新文献_第4页

Optimization Analysis of Variable Gradient Structures with Shape Memory Characteristics in zero Poisson's ratio Metamaterials 零泊松比超材料中具有形状记忆特性的变梯度结构优化分析

4区材料科学

Functional Materials Letters Pub Date : 2023-10-21 DOI: 10.1142/s1793604723510232

Rui Zhou, Xin Huang, Fangfang Zhang

{"title":"Optimization Analysis of Variable Gradient Structures with Shape Memory Characteristics in zero Poisson's ratio Metamaterials","authors":"Rui Zhou, Xin Huang, Fangfang Zhang","doi":"10.1142/s1793604723510232","DOIUrl":"https://doi.org/10.1142/s1793604723510232","url":null,"abstract":"Mechanical metamaterials can achieve fantastic properties fabricated using artificial structural design. In this study, shape memory polymers (SMP) were combined to design variable gradient zero Poisson ratio mechanical metamaterials and 3D printing was used to fabricate complex structures. The shape memory performance of these structures was investigated by conducting simulation calculations to analyze the variations of zero Poisson’s ratio structures with different wall thicknesses, cell internal angles, and inclined wall length gradients. Through the analysis of structural dimension factors, it is concluded that the structures with smaller wall thickness and intracellular angle exhibit better shape memory performance. In order to further enhance the shape memory performance, several models with identical wall thickness and internal angles were designed to investigate the influence of inclined wall length gradients on shape memory characteristics, leading to the identification of optimal gradient structures. Finally, thermal cycling experiments were conducted on samples to validate the accuracy of the simulation results. The investigation of shape memory recovery characteristics in variable gradient zero Poisson’s ratio structures provides new insight and method for the optimization design and application of smart materials in mechanical metamaterial structures.","PeriodicalId":12701,"journal":{"name":"Functional Materials Letters","volume":"130 1-4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135463227","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

Photothermal insulation mechanism of submicron ITO hollow particles in PVDF film 亚微米ITO中空颗粒在PVDF薄膜中的光热隔热机理

4区材料科学

Functional Materials Letters Pub Date : 2023-10-21 DOI: 10.1142/s1793604723400295

Hedong Li, Peihu Shen, Zizheng He, Yang Xu, Minjia Wang

引用次数: 0

Adsorption of PPL on a high thermal stable DUT-5 and their catalytic activity in a transesterification reaction of cinnamyl alcohol and vinyl acetate 高热稳定DUT-5对PPL的吸附及其在肉桂醇与醋酸乙烯酯交换反应中的催化活性

4区材料科学

Functional Materials Letters Pub Date : 2023-10-21 DOI: 10.1142/s1793604723500224

Xiaolin Zhou, Jingxiao Zheng, Xia Zhang

引用次数: 0

Simulation and Fabrication of Titanium dioxide thin films for supercapacitor electrode applications 超级电容器电极用二氧化钛薄膜的模拟与制备

4区材料科学

Functional Materials Letters Pub Date : 2023-10-20 DOI: 10.1142/s1793604723400349

S. Harish, Muhammad Hamza, P. Uma Sathyakam, Annamalai Senthil Kumar

{"title":"Simulation and Fabrication of Titanium dioxide thin films for supercapacitor electrode applications","authors":"S. Harish, Muhammad Hamza, P. Uma Sathyakam, Annamalai Senthil Kumar","doi":"10.1142/s1793604723400349","DOIUrl":"https://doi.org/10.1142/s1793604723400349","url":null,"abstract":"Nanostructured thin-film electrode materials are proposed for supercapacitors due to their outstanding performance over bulk materials. In this work, we fabricated a TiO 2 nanotube film over a titanium foil using a top-down approach for supercapacitor electrodes. We noticed that the fabricated nanotubes are uniform and well aligned, confirmed by FESEM; the TiO 2 nanotube parameters were further simulated using COMSOL Multiphysics. Simulations show an areal capacitance of 1.19393 pF/cm 2 with oxidation and reduction peak currents of 6.18921 × 10[Formula: see text] A and − 6.0320 × 10[Formula: see text] A, respectively, at 10 mV/s scan rate. The as-prepared nanotubes show a poor areal capacitance of 1.0193 F/cm 2 , which is improved to 12.8764 F/cm 2 at a scan rate of 10 mV/s, that is approximately 12.63 times with oxidation and reduction peak currents of 0.129 mA/cm 2 and − 0.105 mA/cm 2 , respectively, by performing an electrochemical etching. Further, the surface roughness of both as-prepared and etched samples is studied to comment on their surface area changes. The effect of the etched sample is studied, compared and validated with simulation, which reveals that the etched TiO 2 nanotubes thin-film sample shows considerable similarity with the simulation results.","PeriodicalId":12701,"journal":{"name":"Functional Materials Letters","volume":"73 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135514122","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

Synthesis of 2-D Type A molecular sieves by alkaline removal of natural kaolin 碱性脱除天然高岭土合成二维A型分子筛

4区材料科学

Functional Materials Letters Pub Date : 2023-10-20 DOI: 10.1142/s1793604723510244

Suyang Wang, Weilin Jia, Yingying Deng, Jie Shen, Jun Cao, Peng Wang, Ping Zhao, Yuanyu Wang, Qi Sun

{"title":"Synthesis of 2-D Type A molecular sieves by alkaline removal of natural kaolin","authors":"Suyang Wang, Weilin Jia, Yingying Deng, Jie Shen, Jun Cao, Peng Wang, Ping Zhao, Yuanyu Wang, Qi Sun","doi":"10.1142/s1793604723510244","DOIUrl":"https://doi.org/10.1142/s1793604723510244","url":null,"abstract":"Type A molecular sieves have been extensively employed in various fields. It is noteworthy that the direct synthesis of type A molecular sieves from natural kaolin is a common practice among researchers. Traditional type A molecular sieves are characterized by a three-dimensional cubic lattice structure. In this study, our objective is to facilitate the transformation of type A molecular sieves into a two-dimensional layered configuration by employing a two-dimensional layered material as a templating agent. In this research, natural kaolin serves as the primary source material. To eliminate impurities including quartz, illite, and dolomite, an alkali-based solvent extraction method is employed, yielding amorphous silicon and aluminum compounds. Subsequently, a graphene-based templating agent is introduced, and a hydrothermal synthesis process is employed to fabricate two-dimensional type A molecular sieves. The method described herein yields two-dimensional layered type A molecular sieves with a crystallinity exceeding 90%, thereby resulting in a specific surface area that is approximately 11-fold greater compared to their three-dimensional type A counterparts. The applicability of this methodology can be extended to the valorization of low-grade natural mineral resources, optimizing their utility. Furthermore, the approach presented herein for the synthesis of two-dimensional molecular sieves is of a universal nature, offering valuable insights that can serve as a reference for the synthesis of various other categories of two-dimensional molecular sieves.","PeriodicalId":12701,"journal":{"name":"Functional Materials Letters","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135514407","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

Sol-gel synthesis, electromagnetic properties and microwave absorption behavior of strontium Co₂Z hexaferrites Co2Z锶六铁体的溶胶-凝胶合成、电磁性能及微波吸收行为

4区材料科学

Functional Materials Letters Pub Date : 2023-10-20 DOI: 10.1142/s1793604723510268

Z.F. Gu, Z.C. Yu, B. Hong, J.C. Xu, Y.B. Han, X.L. Peng, H.L. Ge, X.Q. Wang

{"title":"Sol-gel synthesis, electromagnetic properties and microwave absorption behavior of strontium Co<sub>2</sub>Z hexaferrites","authors":"Z.F. Gu, Z.C. Yu, B. Hong, J.C. Xu, Y.B. Han, X.L. Peng, H.L. Ge, X.Q. Wang","doi":"10.1142/s1793604723510268","DOIUrl":"https://doi.org/10.1142/s1793604723510268","url":null,"abstract":"Owing to the special planar structure and very high resistivity, [Formula: see text]-type hexaferrites possess the high initial permeability and cut-off frequency, indicating great application potential in high-frequency devices. Strontium Co 2 Z hexaferrites (Sr 3 Co 2 Fe[Formula: see text]O[Formula: see text]) were successfully prepared by the sol–gel method and calcined at the different temperatures from 1175[Formula: see text]C to 1250[Formula: see text]C. The influence of the calcined temperatures on the microstructure, phase structures, magnetic properties and microwave absorption behavior of all samples was investigated in detail. All results indicated that strontium hexaferrites go through the [Formula: see text]-, [Formula: see text]-, [Formula: see text]-, and [Formula: see text]-phase transformation process from 1175[Formula: see text]C to 1250[Formula: see text]C, and S-1200 (calcined at 1200[Formula: see text]C) is confirmed to be Co 2 Z-type hexaferrites. S-1200 showed the highest imaginary permeability while the imaginary permittivity of all samples is close to zero, indicating the excellent microwave adsorption behavior of strontium Co 2 Z hexaferrites. The reflection loss results indicate that S-1200 exhibits the best microwave absorption performance with the RL value of − 32.4 dB for 4.0 mm thickness at 4.72 GHz, according to the impedance matching and quarter-wavelength theory.","PeriodicalId":12701,"journal":{"name":"Functional Materials Letters","volume":"12 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135514408","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: 1

Preparation of novel azobenzene derivatives/potassium niobate nanocomposite and its application in electrochemical sensors 新型偶氮苯衍生物/铌酸钾纳米复合材料的制备及其在电化学传感器中的应用

4区材料科学

Functional Materials Letters Pub Date : 2023-10-19 DOI: 10.1142/s1793604723510256

Yicheng Zhou, Li Dong, Tongtong Cao, Haoran Wang, Jiazheng Zhang, Xiaobo Zhang, Lin Liu, Zhiwei Tong

{"title":"Preparation of novel azobenzene derivatives/potassium niobate nanocomposite and its application in electrochemical sensors","authors":"Yicheng Zhou, Li Dong, Tongtong Cao, Haoran Wang, Jiazheng Zhang, Xiaobo Zhang, Lin Liu, Zhiwei Tong","doi":"10.1142/s1793604723510256","DOIUrl":"https://doi.org/10.1142/s1793604723510256","url":null,"abstract":"The guest molecule trans-[2-(2,2,3,3,4,4,4-heptafluorobutylamino) ethyl]-2-[4-(4-hexanobenzazo)-phenoxy] ethyl-dimethylammonium (abbreviated as C 3 F 7 -azo[Formula: see text]Br[Formula: see text]) were inserted into the K 4 Nb 6 O[Formula: see text] laminated by the guest–guest exchange method to synthesize C 3 F 7 -azo[Formula: see text]/Nb 6 O[Formula: see text] type-A nanocomposite with excellent electrochemical properties. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier Transform infrared (FTIR) spectrometer and energy dispersive spectroscopy (EDS) were used to characterize the structure and morphology of nanocomposite C 3 F 7 -azo[Formula: see text]/Nb 6 O[Formula: see text]. C 3 F 7 -azo[Formula: see text]ions were speculated to form bilayer between the [Nb 6 O[Formula: see text]][Formula: see text]lamellar at an angle of 51.1[Formula: see text] by morphology analysis and lamellar spacing calculation. This nanocomposite was used to fabricate an electrochemical sensor for simultaneous detection of dopamine (DA) and ascorbic acid (AA). Differential pulse voltammetry, cyclic voltammetry and electrochemical impedance spectroscopy in N 2 -saturated phosphate buffered solution (0.1 M, pH = 5) demonstrated excellent electrocatalytic activity. The sensor achieved detection limits of 1.74 [Formula: see text]M for DA and 1.57 [Formula: see text]M for AA.","PeriodicalId":12701,"journal":{"name":"Functional Materials Letters","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135667124","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

Synthesis and characterization of a β-ketoenamine COF Tp-BD(Me)₂ at mild temperatures β-酮胺COF Tp-BD(Me)2的合成与表征

4区材料科学

Functional Materials Letters Pub Date : 2023-10-18 DOI: 10.1142/s1793604723500212

Shuquan Wan, Guanyu Liu, Ying Chen, Senlin Leng, Yuanyong Yao, Xinjuan Zeng, Cailong Zhou

{"title":"Synthesis and characterization of a β-ketoenamine COF Tp-BD(Me)<sub>2</sub> at mild temperatures","authors":"Shuquan Wan, Guanyu Liu, Ying Chen, Senlin Leng, Yuanyong Yao, Xinjuan Zeng, Cailong Zhou","doi":"10.1142/s1793604723500212","DOIUrl":"https://doi.org/10.1142/s1793604723500212","url":null,"abstract":"In this work, we investigated the morphology and crystallinity changes of a [Formula: see text]-ketoenamine COF, Tp-BD(Me) 2 (Tp=1,3,5-triformylphloroglucinol, BD(Me) 2 =3,3[Formula: see text]-dimethyl-[1,1[Formula: see text]-biphenyl]-4,4[Formula: see text]-diamine), with different reaction time and temperatures. Powder X-ray diffraction (PXRD) and Fourier-transform infrared (FTIR) spectra tests confirmed the synthesis of Tp-BD(Me) 2 , which has a specific [Formula: see text]-ketoenamine linkage and a probable eclipsed stacking mode. At a reaction temperature of 50[Formula: see text]C, the morphology of Tp-BD(Me) 2 underwent a progressive process of growing, extending and splitting. The band gaps of the Tp-BD(Me) 2 obtained with the reaction time of 18–24 h were calculated near 2.0 eV. The BET surface areas of the Tp-BD(Me) 2 were around 400–600 m 2 /g. It is not an optimal choice if the reaction temperature is below 50[Formula: see text]C, which could cause a low crystallinity and disordered morphology. However, slightly improving the reaction temperature to 60[Formula: see text]C is beneficial for generating high-crystallinity Tp-BD(Me) 2 .","PeriodicalId":12701,"journal":{"name":"Functional Materials Letters","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135824167","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

Synthesis, structure and property investigation of a three-dimensional Zn (II) metal–organic frameworks 三维Zn (II)金属-有机骨架的合成、结构与性能研究

4区材料科学

Functional Materials Letters Pub Date : 2023-10-17 DOI: 10.1142/s1793604723500200

Cong-Cong Jiang, Dong-Xin Xu, Pei-Xin Bai, Yong-Xiang Wang, Cheng Zhang, Jun Wang, Shi-Xin Sun

引用次数: 0

Facile graphene quantum dot-anchoring strategy synthesis of single-atom iron-nitrogen electrocatalyst with enhanced ORR performance 具有增强ORR性能的单原子铁氮电催化剂的石墨烯量子点锚定策略合成

4区材料科学

Functional Materials Letters Pub Date : 2023-10-17 DOI: 10.1142/s1793604723400313

Huinian Zhang, Suping Jia, Ning Li, Xiaolin Shi, Ziyuan Li

{"title":"Facile graphene quantum dot-anchoring strategy synthesis of single-atom iron-nitrogen electrocatalyst with enhanced ORR performance","authors":"Huinian Zhang, Suping Jia, Ning Li, Xiaolin Shi, Ziyuan Li","doi":"10.1142/s1793604723400313","DOIUrl":"https://doi.org/10.1142/s1793604723400313","url":null,"abstract":"Single-atom catalysts (SACs), especially atomically dispersed Fe–N[Formula: see text]–C based SACs, hold great promise to replace Pt-based electrocatalysts for oxygen-reduction reaction (ORR). Currently, synthesizing high-activity ORR electrocatalysts with atomically dispersed Fe–N[Formula: see text] site structures is still challenging due to their high surface free energy, which leads to easy migration and serious aggregation. Herein, we have designed a general graphene quantum dots (GQDs)-anchoring strategy to synthesize a single-iron-atom electrocatalyst (Fe–N-GQDs/PC) applied to ORR through calcining of N-GQDs-Fe[Formula: see text] modified porous carbon (PC) and melamine. Experiments demonstrate the N-GQDs consist of abundant oxygenated groups, which could lead to complexing metal ions and thus facilitating the formation of SACs. Furthermore, the Fe–N-GQDs/PC electrocatalyst exhibits outstanding electrocatalytic ORR activity in 0.1 M KOH media with half-wave potentials of 0.84 versus 0.85 V for Pt/C. This strategy has opened up new feasible ideas to produce SACs for electrochemical energy devices.","PeriodicalId":12701,"journal":{"name":"Functional Materials Letters","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135944437","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