利用具有特殊吸附能力的 WO3-BiVO4 纳米片异质结构增强乙二胺检测:实验和理论研究。

IF 2.9 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Nanotechnology Pub Date : 2025-01-15 DOI:10.1088/1361-6528/ada038
Eun-Bi Kim, M Shaheer Akhtar, Sadia Ameen, Ahmad Umar, Sheikh Akbar, S Baskoutas
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引用次数: 0

摘要

研究了单步水热法制备WO3-BiVO4-纳米片异质结构(NFHs)。通过对WO3-BiVO4的晶相和结构行为分析,可以得到晶体质量较好的WO3-BiVO4 NFHs。显微镜下观察,制备的WO3-BiVO4呈现出均匀、明显的纳米片状结构。利用广泛密度泛函理论(DFT)从层能、电荷密度、态密度(DOS)和能带结构等方面考察了制备的WO3-BiVO4 NFHs的电子结构和能带结构。将合成的WO3-BiVO4 NFHs用作检测乙二胺(EDA)化学物质的传感电极,其灵敏度为~318.52 mA。mM-1cm-2,动态范围为1 μM -1 mM,检出限(LOD)为~94.51 nM,保留系数为~0.9929。WO3-BiVO4 NFHs电极对EDA化学具有良好的重现性、稳定性和可重复性。据我们所知,用WO3-BiVO4 NFHs电极制备的化学传感器首次成为识别环境中极低浓度危险化学物质的极有前途的电极材料。重要的是,该化学传感器可以有效地用于环境监测。 。
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Enhanced ethylenediamine detection using WO3-BiVO4nanoflakes heterostructure with exceptional adsorption capabilities: experimental and theoretical studies.

The present work describes the synthesis of WO3-BiVO4-nanoflakes heterostructure (NFHs) by a single step hydrothermal method. The analysis of crystalline phases and structural behavior deduced the formation of good crystal quality WO3-BiVO4NFHs. Under microscopic observation, the as-prepared WO3-BiVO4displayed uniform and conspicuous nanoflakes like structures. The extensive density functional theory was studied to examine the electronic and band structures of as-prepared WO3-BiVO4NFHs in terms of formation energy, charge density, density of state and band structures. The synthesized WO3-BiVO4NFHs was used as sensing electrode towards the detection of ethylenediamine (EDA) chemical that displayed a good sensitivity of ∼318.52 mA·mM-1cm-2, excellent dynamic range of 1μM-1 mM with detection limit of ∼94.51 nM and retention coefficient of ∼0.9929. WO3-BiVO4NFHs electrode possessed the good reproducibility, stability, and repeatability towards EDA chemical. To the best of our knowledge, for the first time, the fabricated chemical sensor fabricated with WO3-BiVO4NFHs electrode could be promising electrode materials to identify dangerous chemicals at very low concentration in environment. Importantly, the fabricated chemical sensor can be effective for environmental monitoring.

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来源期刊
Nanotechnology
Nanotechnology 工程技术-材料科学:综合
CiteScore
7.10
自引率
5.70%
发文量
820
审稿时长
2.5 months
期刊介绍: The journal aims to publish papers at the forefront of nanoscale science and technology and especially those of an interdisciplinary nature. Here, nanotechnology is taken to include the ability to individually address, control, and modify structures, materials and devices with nanometre precision, and the synthesis of such structures into systems of micro- and macroscopic dimensions such as MEMS based devices. It encompasses the understanding of the fundamental physics, chemistry, biology and technology of nanometre-scale objects and how such objects can be used in the areas of computation, sensors, nanostructured materials and nano-biotechnology.
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