Enhanced HClO production from chloride by dual cocatalyst loaded WO₃ under visible light

Abstract

Hypochlorous acid (HClO) as a high value-added oxidation reagent is produced conventionally by a chlor-alkali electrolysis process, which causes heavy economic burden and leads to considerable CO2 emissions. Herein, we...

Sunlight-Driven Generation of Hypochlorous Acid on Plasmonic Au/AgCl Catalysts in Aerated Chloride Solution

“…The irradiation of an NaCl solution with visible light (λ > 420 nm) for 24 h under air (black circle, Figure a) generated 38 ppm of HClO (36 μmol/50 mL). This concentration is higher than that obtained in the reported photocatalytic systems (<2.4 ppm) − or photoelectrochemical systems using photoanodes with external bias (<35 ppm), , confirming the high activity of the present Au/AgCl system. In addition, this concentration (38 ppm) is much higher than the HClO concentration (>3 ppm) recommended by WHO for the disinfection of drinking water, where an HClO solution of >3 ppm has been confirmed to be effective for the disinfection of several types of bacteria and viruses in lakes, rivers, and groundwater containing fecal contamination. , This means that the HClO solution obtained in our experiment has sufficient bactericidal activity.…”

Interfacial engineering of CuWO4/WO3 thin films precisely fabricated by ultrasonic spray pyrolysis for improved solar water splitting

“…1 Photoelectrochemical (PEC) water splitting is a very attractive and promising technology to solve these problems by converting unlimited and sustainable solar energy to clean hydrogen energy. 2,3 At present, a large number of semiconductor materials have been explored as potential photoanodes, such as Fe 2 O 3 , 4,5 BiVO 4 , 6,7 WO 3 , 8,9 and CdS. 10,11 However, their practical applications are limited by the unsatisfactory PEC performance caused by the shortage like large bandgap, weak light absorption, poor stability, and slow charge transfer.…”

Construction of a Bi2MoO6/CoOx/Au system with a dual-channel charge transfer path for enhanced tetracycline degradation

“…It is essential to design a visible light responsive photocatalytic system with a dualchannel charge transfer path for both electrons and holes. 41,42 Fortunately, transition metal oxides have been considered as one of the best candidates for effectively extracting holes and constructing hole transport channels. [43][44][45][46] Among them, CoO x has attracted the interest of many researchers in practical application on account of its high efficiency, affordable cost, and earth abundance.…”

“…It is essential to design a visible light responsive photocatalytic system with a dual-channel charge transfer path for both electrons and holes. 41,42…”