石墨烯
材料科学
复合数
化学工程
电化学
制作
甲基膦酸二甲酯
纳米复合材料
电极
复合材料
纳米技术
化学
无机化学
医学
替代医学
物理化学
病理
工程类
作者
Ashish Kumar,Najmul Haque Barbhuiya,Archana Nair,Kritika Jashrapuria,Nandini Dixit,Swatantra P. Singh
出处
期刊:Chemosphere
[Elsevier]
日期:2023-09-01
卷期号:335: 138988-138988
被引量:5
标识
DOI:10.1016/j.chemosphere.2023.138988
摘要
Titanium suboxides (TSO) are identified as a series of compounds showing excellent electro- and photo-chemical properties. TSO composites with carbon-based materials such as graphene have further improved water splitting and pollutant removal performance. However, their expensive and multi-step synthesis limits their wide-scale use. Furthermore, recently discovered laser-induced graphene (LIG) is a single-step and low-cost fabrication of graphene-based composites. Moreover, LIG's highly electrically conductive surface aids in tremendous environmental applications, including bacterial inactivation, anti-biofouling, and pollutant sensing. Here, we demonstrate the single-step in-situ fabrication of TSO-LIG composite by directly scribing the TiO2 mixed poly(ether) sulfone sheets using a CO2 infrared laser. In contrast, earlier composites were derived from either commercial-grade TSO or synthesized TSO with graphene in multi step processes. The characteristic Ti3+ peaks in XPS confirmed the conversion of TiO2 into its sub-stoichiometric form, enhancing the electro-catalytical properties of the LIG-TiOx composite surface. Electrochemical characterization, including impedance spectroscopy, validated the surface's enhanced electrochemical activity and electrode stability. Furthermore, the LIG-TiOx composite surfaces were tested for anti-biofouling action and electrochemical application as electrodes and filters. The composite electrodes exhibit enhanced degradation performance for removing emerging pollutant antibiotics ciprofloxacin and methylene blue due to the in-situ hydroxyl radical generation. Additionally, the LIG-TiOx conductive filters showed the complete 6-log killing of mixed bacterial culture and MS2 phage virus in flow-through filtration mode at 2.5 V, which is ∼2.5-log more killing compared to non-composited LIG filers at 500 Lm−2h−1. Nevertheless, these cost-effective LIG-TiOx composites have excellent electrical properties and can be effectively utilized for energy and environmental applications.
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