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用于光降解和先进储能应用的BiMoO/MXene纳米结构复合材料的研究。

Investigation of BiMoO/MXene nanostructured composites for photodegradation and advanced energy storage applications.

作者信息

Panda Sagarika, Mehlawat Savita, Dhariwal Neeraj, Yadav Preety, Kumar Vinod, Thakur O P, Brahmankar Neha V, Uke Santosh J, Kumar Ashwani, Sanger Amit

机构信息

Department of Physics, Netaji Subhas University of Technology, Dwarka, New Delhi, 110078, India.

Department of Physics, JDPS College, SGB Amravati University, Amravati, 444803, Maharashtra, India.

出版信息

Sci Rep. 2024 Nov 9;14(1):27416. doi: 10.1038/s41598-024-78887-1.

DOI:10.1038/s41598-024-78887-1
PMID:39521896
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11550469/
Abstract

This study presents nanostructured composite BiMoO/MXene heterostructure by using hydrothermal method for photodegradation of the congo-red dye and also for energy storage devices. X-ray diffractometer (XRD), High Resolution Transmission Electron Microscopy (HRTEM), Field emission scanning electron microscope (FESEM) and X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) were performed to examine the structural properties along with surface area and porosity of the material. Due to addition of MXene the larger surface area and improved pore size help to quickly break down additional organic pollutants by adsorbing them. The band gap of BiMoO/MXene nanostructured composite reduced to 2.4 eV suggesting transfer of electrons from VB to CB. BiMoO/MXene exhibits a high (92.3%) photocatalytic degradation rate for a duration of 16 min which was verified using UV-visible spectroscopy, also scavenger test was conducted to ascertain the reactive agent along with the degradation pathway was confirmed by LCMS. Elemental content was also established by using inductively coupled plasma mass spectrometry (ICP-MS). For estimating energy storage capacity cyclic voltammetry (CV) was performed. It was observed BiMoO/MXene nanostructured composite electrodes had specific capacitance of 642.91Fg, power density of 1.24 kWkg, and energy density of 22.32 Whkg at a current density of 5Ag also it exhibited 64.42% capacity retention having current density 20 Ag throughout 10,000 Galvanostatic charge discharge (GCD) cycles. High electrical conductivity of BiMoO/MXene electrode was again examined by Electrochemical impedance spectroscopy (EIS). These findings demonstrate the potential of BiMoO/MXene nanostructured composites in both photodegradation and energy storage applications.

摘要

本研究采用水热法制备了纳米结构复合BiMoO/MXene异质结构，用于刚果红染料的光降解以及储能器件。使用X射线衍射仪（XRD）、高分辨率透射电子显微镜（HRTEM）、场发射扫描电子显微镜（FESEM）、X射线光电子能谱（XPS）、布鲁诺尔-埃米特-泰勒（BET）法来研究材料的结构性质以及表面积和孔隙率。由于添加了MXene，更大的表面积和改善的孔径有助于通过吸附快速分解额外的有机污染物。BiMoO/MXene纳米结构复合材料的带隙降低到2.4 eV，表明电子从价带转移到导带。BiMoO/MXene在16分钟内表现出92.3%的高光催化降解率，这通过紫外可见光谱法得到验证，还进行了清除剂测试以确定反应剂，同时通过液相色谱-质谱联用（LCMS）确认了降解途径。还使用电感耦合等离子体质谱（ICP-MS）确定了元素含量。为了估计储能容量，进行了循环伏安法（CV）测试。观察到BiMoO/MXene纳米结构复合电极在电流密度为5Ag时的比电容为642.91F/g，功率密度为1.24 kW/kg，能量密度为22.32 Wh/kg，并且在10000次恒电流充放电（GCD）循环中，当电流密度为20Ag时，其容量保持率为64.42%。通过电化学阻抗谱（EIS）再次检测了BiMoO/MXene电极的高电导率。这些发现证明了BiMoO/MXene纳米结构复合材料在光降解和储能应用中的潜力。

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