Abstract

Although liquid-solid contact electrification (CE) is a long-established natural phenomenon, few systematic studies have explored the triboelectric charge-induced chemical reactions it initiates, particularly the reactions caused by flow electrification (FE) within dielectric tubes over long distances. Here, a tunable and easily recyclable contact-electro-chemistry (CE-Chemistry) method is presented, employing triboelectric charge from FE to directly monitor general chemical reactions, such as [Fe(CN)6]4- oxidation, [AuCl4]- reduction, and luminol luminescence etc. The chemical reaction rate could be regulated by physical parameters of dielectric tubes, including input flow velocity, tube inner diameter, length, and series-parallel configurations etc. Additionally, cascade reaction could be designed by simulating the Flow Injection Analysis (FIA) facilities, originally used in analytical chemistry. The CE-Chemistry induced by FE in dielectric tubes holds potential for real-time catalysis of organic waste and reduction of precious metals in wastewater tubes, prompting a reconsideration of the effectiveness of some traditional analytical chemistry methodologies utilizing flow-based systems such as high-performance liquid chromatography (HPLC).

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