不同形貌Nb2O5纳米材料:细长尖形Nb2O5与碳纳米球复合材料生长优化的比较研究

IF 2.7 4区 材料科学 Q3 CHEMISTRY, PHYSICAL
Bramhaiah Kommula, Ramya Prabhu B, Harishankar Kopperi, Vinay S. Bhat, Gurumurthy Hegde, Neena S. John
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引用次数: 0

摘要

具有复杂形态和活性相的纳米材料的可控合成和设计为利用其独特的化学和物理性质进行各种应用提供了新的前景。本文报道了一种简单有效的水热方法,利用尿促蛋白作为生长导向和水解剂,在各种混合和纯溶剂中制备了各种复杂的Nb - 2o5纳米结构,包括薄片、厚片、尖状和长尖状海胆。详细介绍了合成的n2o5纳米结构的结构、化学组成、表面形貌和结晶度。促尿激素浓度、反应时间和水-乙醇混合溶剂对获得长刺海胆形态起关键作用。尖尖的Nb 2o - 5结构表现为假六方相,尿毒素含量较少,而尿毒素浓度较高时得到薄片,主要为无定形。这些结构在高温煅烧过程中发生晶体相和形态的转变,揭示了促尿激素在稳定它们方面的积极作用。通过在CNS存在的情况下原位生长Nb 2o - 5,在不影响形貌、相和结晶度的情况下,获得了尖海胆Nb 2o - 5 -碳纳米球的复合材料(suNb 2o - 5 - CNS)。sunb2o5 - CNS复合材料在超级电容器应用中具有比其成分更高的电荷存储容量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Diverse Morphologies of Nb<sub>2</sub>O<sub>5</sub> Nanomaterials: A Comparative Study for the Growth Optimization of Elongated Spiky Nb<sub>2</sub>O<sub>5</sub> and Carbon Nanosphere Composite

Diverse Morphologies of Nb2O5 Nanomaterials: A Comparative Study for the Growth Optimization of Elongated Spiky Nb2O5 and Carbon Nanosphere Composite
Abstract Controlled synthesis and design of nanomaterials with intricate morphologies and active phases offer new prospects in harnessing their unique chemical and physical properties for various applications. Herein, a facile and efficient hydrothermal approach is reported for obtaining various complex Nb 2 O 5 nanostructures, including thin sheets, thick flakes, spiky and elongated spiky sea urchin morphologies using urotropin as a growth‐directing and hydrolyzing agent in various mixed and pure solvents. The detailed structural and chemical composition, surface morphology and crystallinity of as‐synthesized Nb 2 O 5 nanostructures are presented. The urotropin concentration, reaction time, and water‐ethanol solvent mixture play a critical role for obtaining the elongated spiky sea urchin morphologies. The spiky Nb 2 O 5 structures show a pseudohexagonal phase with less urotropin content, while thin sheets are obtained with a higher urotropin concentration and are primarily amorphous. These structures undergo transformation in their crystal phase and morphologies during calcination at higher temperatures revealing the active role of urotropin in stabilizing them. A composite of spiky sea urchin Nb 2 O 5 ‐carbon nanospheres (suNb 2 O 5 ‐CNS) is achieved by in‐situ growth of Nb 2 O 5 in the presence of CNS without compromising on morphology, phase, and crystallinity. suNb 2 O 5 ‐CNS composite is shown to possess higher charge storage capacity compared to its constituents for supercapacitor applications.
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来源期刊
Particle & Particle Systems Characterization
Particle & Particle Systems Characterization 工程技术-材料科学:表征与测试
CiteScore
5.50
自引率
0.00%
发文量
114
审稿时长
3.0 months
期刊介绍: Particle & Particle Systems Characterization is an international, peer-reviewed, interdisciplinary journal focusing on all aspects of particle research. The journal joined the Advanced Materials family of journals in 2013. Particle has an impact factor of 4.194 (2018 Journal Impact Factor, Journal Citation Reports (Clarivate Analytics, 2019)). Topics covered include the synthesis, characterization, and application of particles in a variety of systems and devices. Particle covers nanotubes, fullerenes, micelles and alloy clusters, organic and inorganic materials, polymers, quantum dots, 2D materials, proteins, and other molecular biological systems. Particle Systems include those in biomedicine, catalysis, energy-storage materials, environmental science, micro/nano-electromechanical systems, micro/nano-fluidics, molecular electronics, photonics, sensing, and others. Characterization methods include microscopy, spectroscopy, electrochemical, diffraction, magnetic, and scattering techniques.
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