Diamond and Related Materials最新文献_第3页

Green synthesis of reduced graphene oxide using Persea americana mill. extract: Characterization, oxygen reduction reaction and antibacterial application 利用鲈鱼提取物绿色合成还原氧化石墨烯：表征、氧还原反应和抗菌应用

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-09-02 DOI: 10.1016/j.diamond.2024.111560

{"title":"Green synthesis of reduced graphene oxide using Persea americana mill. extract: Characterization, oxygen reduction reaction and antibacterial application","authors":"","doi":"10.1016/j.diamond.2024.111560","DOIUrl":"10.1016/j.diamond.2024.111560","url":null,"abstract":"<div>Reduced graphene oxide (rGO) has garnered tremendous attention due to its salient properties that make it applicable in various electrochemical and environmental remediation fields. However, the commonly used chemical method to obtain rGO from graphene oxide (GO) involves toxic chemicals making both the process and product toxic and expensive. In the present work, the suitability of Avocado (Persea americana Mill) seed extract to reduce as-synthesized GO to rGO was investigated fully by optimising the reducing parameters such as the pH, temperature, amount of extract and reduction time. The formation of rGO from GO was confirmed with UV–Vis spectrophotometry (UV–Vis), Fourier Transform Infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), Transmission Electron Microscopy (TEM) and the thermogravimetric analysis (TGA). The optimal conditions for reducing GO with avocado seed extract are pH 8, 100 °C, and 12 h. The average thickness and width for the rGO was 5.55 nm and 11.39 nm accordingly. While GO exhibited a ζ of −29.9.3 mV, the reduced GO possessed a − 38.2 mV. Calculations from the Kotouckey-Levich's equation demonstrated that the obtained rGO can potentially be applied as an oxygen reduction reaction (ORR) catalyst for the generation of hydrogen peroxide since it follows a 2e− pathway mechanism where hydrogen peroxide is generated as an intermediate. Additionally, the avocado seed extract reduced GO demonstrated a slight growth inhibition of methicillin resistant S. aureus (MRSA).</div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0925963524007738/pdfft?md5=751460b2c0e4c0bf596ada72ae4f801b&pid=1-s2.0-S0925963524007738-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142164614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanoarchitectonics with reduced graphene oxide nanosheets for photo- and humidity sensing properties 利用还原氧化石墨烯纳米片的纳米结构实现光和湿度传感特性

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-09-02 DOI: 10.1016/j.diamond.2024.111563

引用次数: 0

A comparative study of the carbon-based nanostructures for the delivery and detection of drug metronidazole 用于递送和检测药物甲硝唑的碳基纳米结构比较研究

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-09-02 DOI: 10.1016/j.diamond.2024.111562

{"title":"A comparative study of the carbon-based nanostructures for the delivery and detection of drug metronidazole","authors":"","doi":"10.1016/j.diamond.2024.111562","DOIUrl":"10.1016/j.diamond.2024.111562","url":null,"abstract":"<div>The interactions between the metronidazole molecule and three different carbon-based nanostructures, fullerene (C60), carbon nanotube (CNT), and carbon nanosheet (CNS), were examined using density functional theory (DFT) calculations. The results indicate that C60 attaches metronidazole more stronger than CNT and CNS, and the adsorption energies of metronidazole with C60, CNT, and CNS are decreased after considering the solvent effects. The variation in energy gaps follows the order of CNS > C60 > CNT, indicating that CNS has better sensing performance for metronidazole compared to fullerene and CNT. Both CNT and CNS show a reasonable recovery time at an achievable operating temperature. According to the quantum theory of atoms in molecules (QTAIM) and symmetry-adapted perturbation theory (SAPT), the dispersion component is the primary factor in stabilization, followed by electrostatic interaction. Simulated infrared (IR) and ultraviolet-visible (UV–Vis) spectra provide a basis reference for further structural characterization. This work indicates that carbon-based nanomaterials have potential applications in the delivery and detection of metronidazole.</div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150132","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

An alternative approach in the synthesis of strontium-hydroxyapatite and strontium hydroxyapatite embedded in graphitic carbon nitride nanocomposites for potential tissue engineering applications 合成嵌入石墨氮化碳纳米复合材料中的羟基磷灰石锶和羟基磷灰石锶的另一种方法，用于潜在的组织工程应用

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-09-02 DOI: 10.1016/j.diamond.2024.111561

{"title":"An alternative approach in the synthesis of strontium-hydroxyapatite and strontium hydroxyapatite embedded in graphitic carbon nitride nanocomposites for potential tissue engineering applications","authors":"","doi":"10.1016/j.diamond.2024.111561","DOIUrl":"10.1016/j.diamond.2024.111561","url":null,"abstract":"<div>Sr-hydroxyapatite has drawn much attention with promising applications in biomedical engineering especially in drug delivery and tissue repair. A novel protocol for the preparation of Strontium hydroxyapatite (Sr-HAP) and Strontium hydroxyapatite encapsulated by graphitic carbon nitride (Sr-HAP@gCN) with high purity and better homogeneity was adopted for potential use in orthopaedic surgeries. The physiological pathway of Strontium and calcium inside humans follow the same trend leading to the mineral deposition of the bone. In the present study, a novel attempt in synthesizing Sr-HAP and Sr-HAP@gCN by the hydrothermal method is proposed for obtaining an ideal biomaterial with potential biocompatibility and pharmacological activity. Phase identification by X-ray diffraction (XRD), Fourier transform Infra-Red spectroscopic analysis (FTIR), Electron & atomic force microscopic studies, Thermogravimetric and Raman spectroscopic analysis was performed on the prepared Sr-HAP and Sr-HAP@gCN to characterize the incorporation efficiency of Strontium. Resazurin microtiter assay and MTT assay were used to evaluate antimicrobial susceptibility and biocompatibility. The typical crystal phase of Sr-HAP and a phase change in Sr-HAP@gCN have been demonstrated with special reference to the interfacial connection between gCN and Sr-HAP through FT-IR studies. Raman spectroscopy revealed the archetypal signature of symmetric and asymmetric P<img>O vibrations pertaining to linearity change with the addition of Strontium. The biological effect of Sr-HAP and Sr-HAP@gCN was quite significant in inducing mineralization when kept immersed in simulated body fluid (SBF) for 21 days. Promising results pertaining to antimicrobial susceptibility and biocompatibility have been proved as an encouraging choice for drug delivery applications and bone filling applications.</div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150133","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

Solar/microwave-driven composite membrane evaporation and its application in seawater desalination 太阳能/微波驱动复合膜蒸发及其在海水淡化中的应用

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-09-02 DOI: 10.1016/j.diamond.2024.111541

{"title":"Solar/microwave-driven composite membrane evaporation and its application in seawater desalination","authors":"","doi":"10.1016/j.diamond.2024.111541","DOIUrl":"10.1016/j.diamond.2024.111541","url":null,"abstract":"<div>Increased economic growth and population expansion has heightened the demand for water resources, leading to escalating levels of water scarcity. Sustainable seawater desalination methods, powered by renewable energy, offer promising solutions to the long-standing global water shortage. This study presents a method for seawater desalination that employs eco-friendly materials. The approach involves utilizing metakaolin-based porous geopolymer (GP) as the base material, and depositing graphene oxide (GO) to create a graphene oxide geopolymer (GOGP) composite membrane. The membrane undergoes in-situ self-reduction to obtain reduced graphene oxide geopolymer (rGOGP). The study examines the composition, microstructure, and water evaporation performance of the composite membrane under both solar/microwave-driven. The results show that, under microwave conditions with a frequency of 2450 MHz and power of 400 W, the evaporation rate can reach up to 4.13 kg·m−2·h−1, doubling the evaporation rate achieved through solar-driven evaporation at an equivalent efficiency level. Furthermore, the evaporation rate of the composite membrane remains consistent when exposed to high-concentration saltwater of 15 wt%. Notably, the removal rates of Na+, K+, Ca2+, and Mg2+ all exceed 99 %, meeting the drinking water requirements established by the World Health Organization. This study provides a novel approach to seawater desalination utilizing environmentally friendly materials and clean energy sources.</div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150128","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

Graphene nanoplatelet reinforced Al-based composites prepared from recycled powders via mechanical alloying and pressureless sintering 利用回收粉末通过机械合金化和无压烧结制备石墨烯纳米平板增强铝基复合材料

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-08-31 DOI: 10.1016/j.diamond.2024.111552

{"title":"Graphene nanoplatelet reinforced Al-based composites prepared from recycled powders via mechanical alloying and pressureless sintering","authors":"","doi":"10.1016/j.diamond.2024.111552","DOIUrl":"10.1016/j.diamond.2024.111552","url":null,"abstract":"<div>This study reports on the powder metallurgy preparation and characterization of aluminum-graphene nanoplatelet (Al-GNP) composites synthesized using recycled Al powders. Recycled Al and GNP powders (0.1–1 wt%) were mechanically alloyed (MA'd) for 4 h, followed by cold pressing (at 450 MPa) and pressureless sintering at 590 °C for 2 h. Starting powders were analyzed using an optical emission spectrometer (OES) and a Raman spectrometer. Also, MA'd powders and sintered samples were characterized using an X-ray diffractometer (XRD), a scanning electron microscope/energy dispersive spectrometer (SEM/EDS), and a differential scanning calorimeter (DSC). Particle size analyses, pycnometer, and Archimedes' densities, Vickers microhardness, dry-sliding wear, and compression tests were also conducted. The Al4C3 formation was observed in the XRD patterns of sintered compositions. The highest and lowest relative densities were measured for the 1 wt% and 0.1 wt% GNP reinforced samples as 97 % and 92 %, respectively. The highest hardness value was obtained as approximately 1.31 GPa for 1 wt% GNP reinforced. With the addition of reinforcement GNP, the wear rate developed to approximately 0.00225 mm3/Nm. The compressive strength increased from nearly 70 MPa to 162 MPa.</div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150124","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

Carbon nanodots-based interfacial nanofluid for high-performance solar-driven water evaporation 基于碳纳米点的高性能太阳能驱动水蒸发界面纳米流体

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-08-30 DOI: 10.1016/j.diamond.2024.111551

{"title":"Carbon nanodots-based interfacial nanofluid for high-performance solar-driven water evaporation","authors":"","doi":"10.1016/j.diamond.2024.111551","DOIUrl":"10.1016/j.diamond.2024.111551","url":null,"abstract":"<div>Solar steam generation through volumetric heating using nanofluids is a promising approach for wastewater treatment and desalination. However, low evaporation rate and slow response time to the change in solar intensity seriously affect their cumulative evaporation performance in practice. Here, we propose an interfacial nanofluid structure for high-performance solar-driven water evaporation using carbon nanodot (CDs) nanofluid and airlaid paper. CDs nanofluid transferred down through the paper from a source water tank to form an interfacial evaporation structure and ensure continuous water supply for evaporation. The solar conversion heat was only localized on a small amount of nanofluid on the paper resulting in low heat loss to the bulk nanofluid and a fast response time of within 2 min to reach a steady evaporation rate. In addition, the flowing nanofluid on the paper can absorb environmental energy to achieve high-rate evaporation of 1.93 kg m−2 h−1 under one sun irradiation. This study provides an effective strategy to improve the performance of volumetric heating systems for solar wastewater treatment and desalination.</div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098116","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

Elucidating the photocatalytic mechanism of biomass-derived carbon dots nanocomposite for efficient degradation of MB and CR dyes: Insights into protein binding applications 阐明生物质衍生碳点纳米复合材料高效降解 MB 和 CR 染料的光催化机理：蛋白质结合应用的启示

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-08-30 DOI: 10.1016/j.diamond.2024.111547

{"title":"Elucidating the photocatalytic mechanism of biomass-derived carbon dots nanocomposite for efficient degradation of MB and CR dyes: Insights into protein binding applications","authors":"","doi":"10.1016/j.diamond.2024.111547","DOIUrl":"10.1016/j.diamond.2024.111547","url":null,"abstract":"<div>This study introduces an environmentally sustainable method for synthesizing a nanocomposite using carbon quantum dots derived from green tea waste and zinc oxide. The single-step hydrothermal process not only addresses waste management but also yields a versatile nanocomposite with diverse applications. Rigorous characterization reveals its morphology, crystallinity, phase identification, structural behavior, optical properties, and chemical composition. Incorporating carbon quantum dots into the zinc oxide matrix reduces the band gap to 1.87 eV, enhancing charge separation and light-harvesting. This modification significantly boosts photocatalytic activity, achieving degradation efficiencies of 95.16 % for methylene blue (MB) and 93.21 % for congo red (CR) under visible light. The effects of pH, contact time, and photocatalyst concentration on dye degradation were explored. The nanocomposite, exhibiting both adsorption and photocatalytic performance, is poised for broad applications. Fluorescence quenching studies with lysozyme protein provide insights into potential applications across diverse fields, highlighting its environmentally friendly and multifunctional attributes.</div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142122015","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

Ultrathin 2D2D WO3-x-C3N4 heterostructure-based high-efficiency photocatalyst for selective oxidation of toluene 基于超薄 2D2D WO3-x-C3N4 异质结构的高效光催化剂用于甲苯的选择性氧化

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-08-30 DOI: 10.1016/j.diamond.2024.111534

{"title":"Ultrathin 2D2D WO3-x-C3N4 heterostructure-based high-efficiency photocatalyst for selective oxidation of toluene","authors":"","doi":"10.1016/j.diamond.2024.111534","DOIUrl":"10.1016/j.diamond.2024.111534","url":null,"abstract":"<div>Photocatalytic oxidation of toluene for the organic synthesis of value-added benzaldehyde has attracted great attention in recent years. However, activation of C<img>H bonds and selective production of benzaldehyde under mild green conditions remains a great challenge. Herein, a series of two-dimensional (2D) ultrathin heterostructure-based components (WO3-x-C3N4 nanosheets), fabricated by coupling oxygen-deficient WO3-x with amorphous C3N4 via a simple electrostatic self-assembly method, was demonstrated as high-efficiency photocatalysts to produce benzaldehyde in the presence O2 as oxidant at room temperature. Under optimal conditions, the prepared 10WCN sample (10 wt% WO3-x-C3N4) exhibited improved photocatalytic oxidation ability with a good benzaldehyde selectivity (96 %) and high benzaldehyde yield (2738.6 μmol g−1 h−1) within 6 h, which is 6.6 and 3.3 times than that of pure WO3-x (412.5 μmol g−1 h−1) and C3N4 (835.7 μmol g−1 h−1). The enhanced photocatalytic performance was due to the constructed 2D type II heterojunction and abundant oxygen vacancies (OVs), contributing to the photoinduced carriers' separation and migration efficiently. This work indicates the synergistic effect of defect metal oxides and 2D ultrathin sheet-to-sheet heterojunctions in photocatalytic hydrocarbon conversion.</div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098236","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 tunable graphene dual mode absorber for efficient terahertz radiation absorption and sensing applications 用于高效太赫兹辐射吸收和传感应用的可调石墨烯双模吸收器

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-08-30 DOI: 10.1016/j.diamond.2024.111554

{"title":"A tunable graphene dual mode absorber for efficient terahertz radiation absorption and sensing applications","authors":"","doi":"10.1016/j.diamond.2024.111554","DOIUrl":"10.1016/j.diamond.2024.111554","url":null,"abstract":"<div>This paper presents a novel plasmonic graphene absorber designed for the terahertz frequency range, utilizing a dual mode optical filter configuration. The absorber consists of a layered periodic array comprising gold, SiO₂ and graphene. Key components include a graphene disk and four strategically positioned graphene stripes on a SiO₂ substrate. An underlying gold layer enhances the absorption efficiency by serving as a reflector. The structure is numerically simulated using the 3D finite difference time domain (FDTD) method. A comprehensive parametric study has been conducted to optimize the absorber's performance. The simulation results demonstrate near perfect absorption at 4.16 THz and 5.88 THz. This innovative design enables efficient absorption of terahertz radiation due to the plasmonic resonance effects of the graphene components. Additionally, the absorption frequency can be dynamically adjusted by altering the chemical potential of graphene through applying an external bias voltage. The tailored geometry and material composition result in a compact absorber with high absorption values and tunability. Detailed performance analysis through numerical simulations demonstrates the absorber's potential for applications in sensing, imaging, and communication systems operating in the terahertz frequency range.</div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142122016","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