Fabrication of CuS-MoO3 nanocomposite for high-performance photocatalysis and biosensing

IF 4 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Structure Pub Date : 2024-11-23 DOI:10.1016/j.molstruc.2024.140823

E. Vinay Kumar , T.L. Soundarya , B.E. Kumara Swamy , Anitha , G. Nagaraju

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Abstract

The design and development of highly efficient nanostructure materials for photocatalytic and electrochemical applications is very necessary. In this study, CuS-MoO₃ nanocomposite (NCs) was fabricated using a simple wet impregnation process and the photodegradation potential for 8 major hazardous dyes and electrochemical sensing of Dopamine was investigated. X-ray diffraction (XRD), Fourier transform - Infrared spectroscopy (FTIR), UV-Vis spectroscopy (UV-Vis), Photoluminescence spectroscopy (PL), Scanning Electron Microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX) and Transmission Electron Microscopy (TEM) were employed for characterization. Fabricated NCs are made up of CuS in the hexagonal phase and MoO₃ in the orthorhombic phase, both of which react to UV light. Optical and electrochemical impedance spectroscopy (EIS) results show that improved photocatalytic performance is related to increased UV light spectrum sensitivity, inhibited charge carrier recombination, and decreased band gap energy in the NCs. Experimental findings showed that CuS-MoO₃ (CMS) NCs had substantially more photocatalytic degradation activity than pure MoO₃ and CuS nanoparticles (NPs). The prepared CMS NCs were then used for electrochemical analysis of Dopamine (DA). Electroanalytical results showed that the CMS NCs had enhanced electrochemical activity towards DA. The constructed sensor has a limit of detection of (6.61 µM) and proved that it is capable of being a sensor.

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高性能光催化和生物传感用cu - moo3纳米复合材料的制备

设计和开发用于光催化和电化学的高效纳米结构材料是非常必要的。本研究采用简单的湿浸渍法制备了cu - moo3纳米复合材料（NCs），研究了cu - moo3纳米复合材料对8种主要有害染料的光降解潜力以及对多巴胺的电化学传感。采用x射线衍射（XRD）、傅里叶变换-红外光谱（FTIR）、紫外-可见光谱（UV-Vis）、光致发光光谱（PL）、扫描电子显微镜（SEM）、能量色散x射线光谱（EDX）和透射电子显微镜（TEM）进行表征。合成的纳米碳化物由六方相的cu和正交相的MoO3组成，两者都能与紫外光发生反应。光学和电化学阻抗谱（EIS）结果表明，NCs光催化性能的提高与提高紫外光谱灵敏度、抑制载流子复合和降低带隙能有关。实验结果表明，cu -MoO3 （CMS）纳米粒子比纯MoO3和cu纳米粒子（NPs）具有更高的光催化降解活性。将制备的CMS神经网络用于多巴胺（DA）的电化学分析。电分析结果表明，CMS NCs对DA具有较强的电化学活性。所构建的传感器的检测极限为（6.61µM），并证明了其作为传感器的能力。

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来源期刊

Journal of Molecular Structure 化学-物理化学

CiteScore

7.10

自引率

15.80%

发文量

2384

审稿时长

45 days

期刊介绍： The Journal of Molecular Structure is dedicated to the publication of full-length articles and review papers, providing important new structural information on all types of chemical species including: • Stable and unstable molecules in all types of environments (vapour, molecular beam, liquid, solution, liquid crystal, solid state, matrix-isolated, surface-absorbed etc.) • Chemical intermediates • Molecules in excited states • Biological molecules • Polymers. The methods used may include any combination of spectroscopic and non-spectroscopic techniques, for example: • Infrared spectroscopy (mid, far, near) • Raman spectroscopy and non-linear Raman methods (CARS, etc.) • Electronic absorption spectroscopy • Optical rotatory dispersion and circular dichroism • Fluorescence and phosphorescence techniques • Electron spectroscopies (PES, XPS), EXAFS, etc. • Microwave spectroscopy • Electron diffraction • NMR and ESR spectroscopies • Mössbauer spectroscopy • X-ray crystallography • Charge Density Analyses • Computational Studies (supplementing experimental methods) We encourage publications combining theoretical and experimental approaches. The structural insights gained by the studies should be correlated with the properties, activity and/ or reactivity of the molecule under investigation and the relevance of this molecule and its implications should be discussed.