Advanced Materials Proceedings最新文献

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Lithium Ion Battery: An Era of Portable Energy and the Nobel Prize 2019 锂离子电池:便携能源时代与2019年诺贝尔奖

Advanced Materials Proceedings

Pub Date : 2019-11-27 DOI: 10.5185/amp.2019.1004

Prashant Mishra

引用次数: 0

Crystal Packing Analysis of Picric Acid, Phthalazone and their Cocrystal using Hirshfeld Computational Studies 用Hirshfeld计算法分析苦味酸、邻苯二酮及其共晶的晶体堆积

Advanced Materials Proceedings

Pub Date : 2019-09-01 DOI: 10.5185/amp.2019.0013

U. Likhitha

In this paper we present the investigation of crystal packing of picric acid (PA), phthalazone (PZ) and their cocrystal phthalazone-picric acid (PA-PZ) using Hirshfeld surface computational analysis. The title molecules are synthesized, crystallized and three-dimensional structures are redetermined using XRD analysis. PA exhibit intermolecular hydrogen bonds O---H…N, O---H…O and intermolecular connection N---O...  . PZ shows N---H…O molecular interaction in it. O---H…O molecular contact has been noticed in PA-PZ. These intermolecular contacts within the crystal structure are quantified, evaluated and visualized in terms of 2D-finger print plots and Hirshfeld surfaces. In all crystal structures, O...H intercontact is common. The major contacts observed are O…H in PA and PA-PZ, H…H in PZ, respectively. In addition, electrostatic potential surface mappings are drawn on Hirshfeld surfaces for all the

本文采用Hirshfeld表面计算法研究了苦味酸(PA)、邻苯二甲酸(PZ)及其共晶邻苯二甲酸-苦味酸(PA-PZ)的晶体填充。合成了标题分子，并用XRD分析重新确定了标题分子的三维结构。PA具有分子间氢键O—H…N、O—H…O和分子间连接N—O…。PZ表现为N—H…O分子相互作用。在PA-PZ中发现了O—H…O分子接触。这些分子间的接触在晶体结构被量化，评估和可视化的2d指纹图和赫希菲尔德表面。在所有的晶体结构中，O…H相互接触是常见的。PA和PA-PZ的主要接触为O…H, PZ的主要接触为H…H。此外，在Hirshfeld表面上绘制了静电势表面映射

引用次数: 1

Stability Analysis on MWCNT/Water Nanofluids with and without Surfactant 添加和不添加表面活性剂MWCNT/水纳米流体稳定性分析

Advanced Materials Proceedings

Pub Date : 2019-09-01 DOI: 10.5185/amp.2019.0016

M. Muruganandam

Much research works are being carried out in applications of nanofluids at different engineering fields as they have improved thermal conductivity. However, the effective applications of nanofluids have limitations such as poor stability, sedimentation, erosive wear and potential health risk. In heat transfer application point of view, stability of nanoparticles plays a major function in enhancing heat transfer. In this experimental investigation, the stability of Multi-walled Carbon Nano Tube (MWCNT)/water nanofluids with surfactant and without surfactant has been carried out by keeping the nanofluids at static condition and at constant temperature at different time interval. The nanofluids were prepared by means of the use of Multi-walled Carbon Nano Tube (MWCNT) as base materials and distilled water as base fluids at 0.1%, 0.3%, 0.5% and 0.7% volume concentration with 0.02% and 0.05% sodium dodecyl butane sulfonate (SDBS) as surfactant and without the surfactant two-step method is used to put together the nanofluids underneath attention. The stability analysis of prepared nanofluids are studied with the UV-Vis. spectrophotometer, measure of zeta potential value , and photograph capturing techniques by keeping the nanofluids under static condition for The MWCNT nanofluids have been characterized with the sample of just after preparation after 30 days of preparation and after 60 days. It is studied that the nanofluids with surfactant showed better stability than the nanofluids without surfactant. Found that the nanofluids at 0.7% volume concentration with surfactant showed good stability with negligible visual sedimentation even after 60 days than the nanofluids without surfactant. Therefore the MWCNT/water nanofluids are the potential heat transfer fluids to apply in heat transfer field. Copyright © VBRI Press.

由于纳米流体改善了导热性，因此在不同的工程领域进行了大量的研究工作。然而，纳米流体的有效应用存在稳定性差、沉积、侵蚀磨损和潜在的健康风险等局限性。从传热应用的角度来看，纳米颗粒的稳定性对增强传热起着重要的作用。本实验研究了多壁碳纳米管(MWCNT)/水纳米流体在不同的时间间隔内保持静态和恒温的稳定性，研究了添加表面活性剂和不添加表面活性剂对纳米流体稳定性的影响。以多壁碳纳米管(MWCNT)为基材，以体积浓度分别为0.1%、0.3%、0.5%和0.7%的蒸馏水为基液，以0.02%和0.05%的十二烷基丁烷磺酸钠(SDBS)为表面活性剂，在不添加表面活性剂的情况下，采用两步法制备纳米流体。用紫外-可见光谱对制备的纳米流体进行了稳定性分析。采用分光光度计，zeta电位值测量，以及在静态条件下保持纳米流体的照片捕捉技术对MWCNT纳米流体进行了表征，分别用制备后30天和60天的样品进行了表征。研究了添加表面活性剂的纳米流体比不添加表面活性剂的纳米流体具有更好的稳定性。结果表明，体积浓度为0.7%的纳米流体与不含表面活性剂的纳米流体相比，即使在60天后仍具有良好的稳定性，可见沉降可以忽略不计。因此，纳米碳纳米管/水纳米流体是一种潜在的换热流体，可以应用于换热领域。版权所有©VBRI出版社。

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引用次数: 0

Optimization of WEDM Process Parameters on Surface Roughness and Study of Physical behaviour using SEM for Machining Aluminium Alloy Al 7075 using Brass Coated Copper Wire 基于表面粗糙度的电火花线切割工艺参数优化及镀黄铜铜线加工Al - 7075铝合金的SEM研究

Advanced Materials Proceedings

Pub Date : 2019-09-01 DOI: 10.5185/amp.2019.0024

S. Jayachandran

Wire Electrical Discharge Machining is one of the most effective Non-Conventional Machining method available to machine intricate shapes which are very difficult to machine with conventional machining methods, on electrically conductive materials having varying hardness. In this research work, an attempt has been made to study the effect of process parameters of WEDM on the Surface roughness. Input process parameters considered in this work are Pulse on time (T ON ), Pulse off time(T OFF ), Wire Feed (WF), Wire Tension(WT) and the Surface Roughness as response. Al 7075 Aluminium alloy was taken as work material and Brass coated copper wire as electrode to machine and the values of roughness obtained by varying the input process parameters were analysed using Taguchi method (L 27 orthogonal array). The measured values have been used to develop the mathematical model and the accuracy of the model was tested using Analysis of Variance (ANOVA) technique. Based on the predicted values the interaction graphs, were drawn between the Surface roughness and the process parameters taken for this study. It was construed that the pulse-on time has the highest impact on the Surface roughness followed by the Wire feed, Wire tension and the Pulse-off time. The surface roughness got increased with increase in wire feed. Finally optimum parameters have been arrived to achieve better surface roughness. WEDMed surface was also examined by using scanning electron microscope (SEM) and evinced that the physical behaviour of these process parameters on Surface roughness. Copyright © VBRI Press.

电线放电加工是一种有效的非常规加工方法，可用于加工具有不同硬度的导电材料的复杂形状，这是传统加工方法难以加工的。本研究尝试研究电火花线切割工艺参数对表面粗糙度的影响。本工作中考虑的输入工艺参数是脉冲接通时间(T on)、脉冲关闭时间(T off)、送丝量(WF)、丝张力(WT)和作为响应的表面粗糙度。以Al 7075铝合金为工作材料，黄铜包覆铜丝为电极进行加工，采用田口法(l27正交阵列)分析了不同输入工艺参数所得到的粗糙度值。利用测量值建立数学模型，并利用方差分析(ANOVA)技术检验模型的准确性。在此基础上，绘制了表面粗糙度与工艺参数之间的相互作用图。结果表明，脉冲开启时间对表面粗糙度的影响最大，其次是送丝量、丝张力和脉冲关闭时间。表面粗糙度随进给量的增加而增大。最后得出了最优参数，以获得较好的表面粗糙度。利用扫描电子显微镜(SEM)对电火花线切割表面进行了检测，证明了这些工艺参数对表面粗糙度的物理行为。版权所有©VBRI出版社。

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引用次数: 0

An Unsupervised Learning of Hyperspectral Images using Fuzzy C-means (FCM) Clustering Method with Glowworm Swarm Optimization (GSO) 基于模糊c -均值(FCM)聚类和GSO的高光谱图像无监督学习

Advanced Materials Proceedings

Pub Date : 2019-09-01 DOI: 10.5185/amp.2019.0019

C. Rajinikanth

The unsupervised learning method is one of the formidable operations in Hyper-Spectral Image (HSI) processing. Fuzzy C-Means (FCM) clustering is an optimistic and strategic method for selecting the unsupervised bands. There are some limits and standards in fuzzy clustering technique. The Glowworm Swarm Optimization (GSO) is proposed with combining fuzzy clustering and GSO. The GSO is introduced to enhance the performance of fuzzy clustering to optimize the characteristics of hyperspectral images. The main objective of the proposed method is to improve the accuracy of the hyperspectral datasets and to achieve it through better computational time. The experimental results are achieved through MATLAB toolbox and the proposed method has the capability to perform with the high quality hyperspectral image classification. Copyright © VBRI Press.

无监督学习方法是高光谱图像处理中的难点之一。模糊c均值(FCM)聚类是一种选择无监督波段的乐观策略方法。模糊聚类技术存在一定的限制和标准。将模糊聚类和GSO相结合，提出了一种萤火虫群优化算法。引入GSO算法提高模糊聚类算法的性能，优化高光谱图像的特征。该方法的主要目标是提高高光谱数据集的精度，并通过更好的计算时间来实现。通过MATLAB工具箱对实验结果进行了验证，表明该方法能够对高质量的高光谱图像进行分类。版权所有©VBRI出版社。

引用次数: 1

Synthesis and Characterization of Graphene Oxide Coated Au Nano Particles and The Study of its Application on Electro Catalytic Activity of Nitric Oxide 氧化石墨烯包覆金纳米粒子的合成、表征及其在一氧化氮电催化活性中的应用研究

Advanced Materials Proceedings

Pub Date : 2019-09-01 DOI: 10.5185/amp.2019.0022

A. Shalini

Synthesis of graphene oxide has entice good dispense of consciousness due to their vast utilization in different fields in modern days. In the present investigation, we report on the preparation of graphene oxide via a modified Hummer’s method. The nanocomposite were isolated and then characterized by using various analytical techniques to understand the composition and the surface morphology of the nanocomposites. The structure as well as morphology of the nanocomposites were analyzed using SEM Instruments. The electro chemical behavior of the compound was studied by cyclic voltammetry in various supporting electrolyte. The electrocatalytic behavior of the nanocomposites monitored over the oxidation of nitric oxide (NO). Copyright © VBRI Press.

氧化石墨烯的合成由于其在不同领域的广泛应用而引起了人们的广泛关注。在本研究中，我们报告了通过改进的Hummer方法制备氧化石墨烯的方法。对所制备的纳米复合材料进行了分离，并利用各种分析技术对其进行了表征，以了解其组成和表面形貌。利用扫描电镜对复合材料的结构和形貌进行了分析。用循环伏安法研究了该化合物在不同载体电解质中的电化学行为。研究了纳米复合材料在氧化一氧化氮过程中的电催化行为。版权所有©VBRI出版社。

引用次数: 0

Synthesis, Crystal Growth and Characterization of Serine Zinc Acetate an Organic Nonlinear Optical material by Slow Evaporation Method 慢蒸发法制备丝氨酸醋酸锌有机非线性光学材料的合成、晶体生长及表征

Advanced Materials Proceedings

Pub Date : 2019-09-01 DOI: 10.5185/amp.2019.0020

R. Sakunthaladevi

Optically good quality single crystal of Serine Zinc Acetate (SZA) was grown by the method of slow evaporation and using a solvent of water. The value of cell parameters was obtained by single crystal XRD study. The various functional groups of molecules present in SZA were identified from FTIR studies. The optical behaviour of the grown crystal was analysed through UV-VIS-NIR spectral studies and the material SZA was found to have wide range of transparency in the visible region. The Vickers micro hardness study revealed the hardening nature of the grown material. Thermal stability of SZA was confirmed using thermo gravimetric and differential thermal analyses. The NLO activity of the grown crystal was tested by Kurtz-Perry powder technique. Copyright © VBRI Press.

以水为溶剂，采用缓慢蒸发法制备了光学性能优良的丝氨酸醋酸锌单晶。通过单晶XRD研究得到了电池参数的取值。通过FTIR研究确定了SZA中存在的各种功能基团。通过紫外-可见-近红外光谱研究分析了生长晶体的光学行为，发现材料SZA在可见光区域具有广泛的透明度。维氏显微硬度研究揭示了生长材料的硬化性质。热重分析和差热分析证实了SZA的热稳定性。采用Kurtz-Perry粉末法测定了生长晶体的NLO活性。版权所有©VBRI出版社。

引用次数: 0

Synthesis, Crystallization and Optical Properties of Potassium Nitrate Added L-alanine Single Crystals for Optoelectronic Device Applications 用于光电子器件的硝酸钾添加l -丙氨酸单晶的合成、结晶及光学性质

Advanced Materials Proceedings

Pub Date : 2019-09-01 DOI: 10.5185/amp.2019.0023

M. Sundaram

Current work, L-alanine single crystals in the presence of potassium nitrate were grown by slow evaporation method. The unit cell parameters and crystalline structure of the L-alanine crystal were analysed using powder XRD (PXRD) technique. The numerous functional groups and vibrational modes of the grown crystal were identified by FTIR analysis. The linear optical analysis has been employed in the wavelength range 200-2500 nm to find out the optical transparency of the grown crystal. Nonlinear optical efficiency of the grown crystal is 1.12 times superior to the reference crystalline material KDP. The negative photoconductivity of the grown crystal was exposed by photoconductivity analysis. Copyright © VBRI Press.

引用次数: 0

Photocatalytic Oxidation of Acid Orange 10 dye Molecules using Cerium Oxide Nanosphere Particles under Ultraviolet and Visible Light Irradiations 紫外和可见光下氧化铈纳米球光催化氧化酸性橙10染料分子

Advanced Materials Proceedings

Pub Date : 2019-09-01 DOI: 10.5185/amp.2019.0014

M. P. Kumar

Exploration of semiconductors in the field of photocatalysis plays a crucial role in energy and environmental remediation in particular oxidation/reduction of toxic organic contaminants from water and wastewater. The present research work aims on synthesis of pristine CeO 2 nanoparticles by precipitation method and was thoroughly characterized by Fourier Transform Infrared spectroscopy, X-ray Diffraction, UV-vis-Diffuse Reflectance Spectroscopy, High Resolution Scanning Electron Microscopy, EDAX and Electron Spin Resonance techniques. The band gap energy (E bg ) was found to be 3.19 eV. The synthesized nanomaterials showed spherical morphology and the particles size ranged from 50-93 nm. The insitu generation of · OH radicals was confirmed from ESR studies. The synthesized CeO 2 nanospheres was evaluatedin photocatalytic oxidation of an azo dye Acid orange 10 under Ultraviolet and visible light irradiations. Experimental studies such as pH, catalyst amount and effect of initial dye concentration were also studied. Kinetic studies indicate the photo reaction follows pseudo-first order rate equation. The photocatalytic oxidation of dye molecules were monitored by UV-visible spectroscopy and COD analyses. The level of chemical oxygen demand (COD) of the photodegraded samples decreases in both the photocatalytic systems indicating that dye molecules readily degraded under present experimental conditions.Effect of electrolytes like MgSO 4 ,KCl, Na 2 CO 3 and NaHCO 3 were also investigated to check interference of inorganic anions on photocatalytic oxidation of dye molecules using CeO 2 nanospheres. Finally, the prepared catalyst was checked for its reusability and the photocatalyst exhibited better photocatalytic activity evenafter three cycles of regeneration.Copyright © VBRI Press.

半导体在光催化领域的探索在能源和环境修复中起着至关重要的作用，特别是在水和废水中有毒有机污染物的氧化/还原中。本研究旨在采用沉淀法合成原始的ceo2纳米颗粒，并通过傅里叶变换红外光谱、x射线衍射、紫外可见漫反射光谱、高分辨率扫描电镜、EDAX和电子自旋共振技术对其进行了全面的表征。带隙能(ebg)为3.19 eV。合成的纳米材料呈球形，粒径在50 ~ 93 nm之间。ESR研究证实了·OH自由基的原位生成。对合成的ceo2纳米球在紫外光和可见光下光催化氧化偶氮染料酸橙10的性能进行了评价。实验研究了pH、催化剂用量、初始染料浓度等因素的影响。动力学研究表明，光反应符合准一级速率方程。通过紫外可见光谱和COD分析对染料分子的光催化氧化进行了监测。在两种光催化体系中，光降解样品的化学需氧量(COD)水平都有所下降，表明染料分子在目前的实验条件下容易降解。考察了mgso4、KCl、na2co3和nahco3等电解质对ceo2纳米球光催化氧化染料分子的影响，考察了无机阴离子的干扰作用。最后，对所制备的催化剂的可重复使用性进行了测试，结果表明，经过三次再生后，所制备的光催化剂仍具有较好的光催化活性。版权所有©VBRI出版社。

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引用次数: 0

ZnO Doped Lanthanide Oxide Nanomaterials as Photocatalysts for Selective Organic Transformation Reactions: Synthesis of N-Phenyl-P-Benzoquinonimine ZnO掺杂镧系氧化物纳米材料作为选择性有机转化反应的光催化剂:n -苯基-对苯醌亚胺的合成

Advanced Materials Proceedings

Pub Date : 2019-09-01 DOI: 10.5185/amp.2019.0025

G. Josephine

Heterogeneous semiconductor nanomaterials are widely employed nowadays as efficient photocatalysts for selective organic transformation reactions. A co-precipitation technique was employed for the preparation of ZnO doped dysprosium oxide from the respective metal nitrates and characterization studies were conducted by FT-IR, X-Ray Differaction, UV-Visible-DRS and FE-SEM analysis. XRD showed the prepared nanomaterial to be in a nano range with high crystallinity. The particles possesed a spherical morphology and of the order of 40-50 nm (particle size) as evidenced from FE-SEM analysis. From the UV-Visible-DRS analysis the band gap energy was calculated as 3.15 eV. The synthesized ZnO doped dysprosium oxide was employed as a photocatalyst under UV light irradiation for selective organic transformation reaction. Quinones especially benzoquinones are a class of compounds which forms a basic structural skeleton for various natural compounds. They are widely employed as a precursor for natural products synthesis. Herein we report the synthesis of N-phenyl-p-benzoquinonimine from diphenylamine by employing ZnO doped dysprosium oxide as a photocatalyst under UV light irradiation in ethanol. Thin Layer Chromatography was used to check the progress of the reaction. Optimization studies for the reaction parameters were conducted systematically.

非均相半导体纳米材料是目前广泛应用于选择性有机转化反应的高效光催化剂。采用共沉淀法从不同的金属硝酸盐中制备ZnO掺杂氧化镝，并通过FT-IR、x射线衍射、uv -可见光- drs和FE-SEM分析对其进行了表征。XRD分析表明，所制备的纳米材料在纳米范围内，结晶度高。FE-SEM分析表明，颗粒呈球形，粒径为40-50 nm。通过uv -可见光- drs分析，计算出带隙能量为3.15 eV。将合成的氧化锌掺杂氧化镝作为光催化剂，在紫外光照射下进行选择性有机转化反应。醌类，尤其是苯醌类，是构成多种天然化合物基本结构骨架的一类化合物。它们被广泛用作天然产物合成的前体。本文报道了以氧化锌掺杂的氧化镝为光催化剂，在紫外光照下，以二苯胺为原料合成n -苯基-对苯醌亚胺。用薄层色谱法检查反应的进行情况。系统地进行了反应参数的优化研究。

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