纳米材料
降级(电信)
钙钛矿(结构)
Crystal(编程语言)
化学工程
细菌
材料科学
晶体生长
化学
纳米技术
致病菌
有机化学
结晶学
生物
计算机科学
电信
工程类
遗传学
程序设计语言
作者
Indrajit Mondal,Piyali Halder,Anuja Chatterjee,Neelanjana Bag,Suman Sau,Somen Biswas,Dheeraj Mondal,Biplab Kumar Paul,Pabitra Kumar Paul,Sukhen Das
标识
DOI:10.1016/j.jece.2024.112385
摘要
Addressing water resource depletion from microbial colonies and pollutants, piezo-catalysis, through mechanical energy harvesting, emerges as a promising advanced oxidation process. This work reports the successful synthesis of rhombohedral CoMnO3 (CMO) perovskite (R3) piezo-catalyst with varying calcination time (2-6 hours), amongst which CMO4 exhibited exceptional performance in degrading organic contaminants and microorganisms. Conventional characterizations through XRD, FTIR, XPS, and Raman spectroscopy established pure-phase formation, supported by Rietveld refinement. The synthesis method facilitated irregular spherical agglomerated morphology with an impressive surface area (41.13 m2g-1). Controllable-sized CMO (5-9 nm) semiconductor-nanoparticles enabled unique physicochemical properties, corroborated with ab initio studies, and were suitable for various optoelectronic applications. Furthermore, the elevation in polarization was confirmed by the remarkable dielectric response in CMO4 at low-frequency (~0.1 M@40 Hz), explained via the IBLC model and LFDD mechanism. The underlying excellent polarizability of CMO4 led to attaining a high piezo-catalytic efficiency, efficiently removing ~95% of Congo red within 180 minutes under mechanical stimuli, with a significant rate constant (0.00754 min-1), primarily due to ·OH ROS-generation, suggesting a rapid and effective degradation process. Inspired by this, we applied a piezo-catalytic process for nearly 95% E. faecalis bacterial eradication, marking a first-time use of manganese-based perovskite oxide in piezo-dynamic dye degradation and bacterial elimination.
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