Self-cycled photo-Fenton-like system based on an artificial leaf with a solar-to-H<sub>2</sub>O<sub>2</sub> conversion efficiency of 1.46.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 36008378.
- Also identified by DOI 10.1038/s41467-022-32410-0 and PMC identifier 9411154.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Millions of families around the world remain vulnerable to water scarcity and have no access to drinking water. Advanced oxidation processes (AOPs) are an effective way towards water purification with qualified reactive oxygen species (ROSs) while are impeded by the high-cost and tedious process in either input of consumable reagent, production of ROSs, and the pre-treatment of supporting electrolyte. Herein, we couple solar light-assisted H<sub>2</sub>O<sub>2</sub> production from water and photo-Fenton-like reactions into a self-cyclable system by using an artificial leaf, achieving an unassisted H<sub>2</sub>O<sub>2</sub> production rate of 0.77 μmol/(min·cm<sup>2</sup>) under 1 Sun AM 1.5 illumination. Furthermore, a large (70 cm<sup>2</sup>) artificial leaf was used for an unassisted solar-driven bicarbonate-activated hydrogen peroxide (BAP) system with recycled catalysts for real-time wastewater purification with requirements for only water, oxygen and sunlight. This demonstration highlights the feasibility and scalability of photoelectrochemical technology for decentralized environmental governance applications from laboratory benchtops to industry.
Medical subject headings
- Water Pollutants, Chemical
- Water Purification