Prakash Natarajan, Balaji Ramachandran, Govindaraju Saravanan, Steffi Alexander Pinky, Santhanalakshmi Nagendran, Mohanraj Kumar, Selvarajan Ethiraj, Chandrasekar Narendhar, Samuel Melvin S
Department of Nanoscience and Technology, Sri Ramakrishna Engineering College, Coimbatore, 641022, India.
Department of chemical engineering and Biotechnology National Taipei University of Technology Taiwan, 106, Taiwan.
Environ Res. 2022 Mar;204(Pt D):112383. doi: 10.1016/j.envres.2021.112383. Epub 2021 Nov 20.
Cobalt oxide (CoO) is a low-cost material exhibiting excellent physicochemical and photocatalytic properties indicating its potential use for next-generation eco-friendly energy storage and photocatalytic degradation applications. In this study, CoO nanoarcs were synthesized using SBA-15 as a template by microwave-assisted method to form an S15/m-CoO product. Characterization was done by low and wide-angle X-Ray diffraction, and Fourier transformed infra-red spectroscopic studies confirming the presence of S15/m-CoO. Scanning Electron Microscope images proved the agglomerated nanotube and nanoarcs like the structure of SBA-15 and S15/m- CoO, respectively. Electrochemical studies included cyclic voltammetry, charge/discharge, retention capacity, and electron impedance spectroscopy studies in a 3-electrode system. S15/m-CoO nanoarcs, as the electrode material, was revealed to have a specific capacity of 87.5 C/g in 1 M KOH solution. Upon running 1000 cycles, the material had excellent capacity retention of 87%. The S15/m-CoO product also underwent photocatalytic degradation studies. The Rhodamine R6G dye degradation by S15/m-CoO under UV irradiation exhibited a high degradation percentage of 97.7%, following the first-order kinetics. S15/m-CoO has proven to be biocompatible and can be used to enhance supercapacitors which are an ideal alternative to conventional batteries for energy storage applications. Thus, the data produced proves S15/m-CoO nanoarcs is an excellent electrode material for pseudocapacitive application and a catalyst for photocatalytic degradation of dye molecules.
氧化钴（CoO）是一种低成本材料，具有优异的物理化学和光催化性能，表明其在下一代环保储能和光催化降解应用中的潜在用途。在本研究中，以SBA - 15为模板，采用微波辅助法合成了CoO纳米弧，形成了S15/m - CoO产物。通过低角度和广角X射线衍射以及傅里叶变换红外光谱研究进行表征，证实了S15/m - CoO的存在。扫描电子显微镜图像分别证明了团聚的纳米管和类似SBA - 15和S15/m - CoO结构的纳米弧。电化学研究包括在三电极系统中的循环伏安法、充放电、保留容量和电子阻抗谱研究。作为电极材料，S15/m - CoO纳米弧在1 M KOH溶液中的比容量为87.5 C/g。在运行1000次循环后，该材料具有87%的优异容量保持率。S15/m - CoO产物还进行了光催化降解研究。在紫外光照射下，S15/m - CoO对罗丹明R6G染料的降解遵循一级动力学，降解率高达97.7%。已证明S15/m - CoO具有生物相容性，可用于增强超级电容器，超级电容器是储能应用中传统电池的理想替代品。因此，所产生的数据证明S15/m - CoO纳米弧是一种用于赝电容应用的优异电极材料，也是染料分子光催化降解的催化剂。
