Photo-enhanced Zn-air batteries with simultaneously highly efficient in-situ H2O2 generation for wastewater treatment
Energy crisis and environmental pollution represent a substantial impediment as of today. For the first time, we construct an electricity and H2O2 cogeneration-pollutant degradation integrated system based on a Zn-air battery with polyterthiophene (pTTh) as photo-enhanced electrocatalysts for high-efficient catalyzing 2e oxygen reduction reaction (ORR). This integrated system manifests lager peak power density of 195.0 mW/g at 150.0 mA/g, as well as high H2O2 production rate of 34.8 mg/L/h. Simultaneously, the superoxide (O2.) and hydroxyl radicals (.OH) resulting from the decomposition of the in-situ generated H2O2 can be used as oxidants to degrade the pollutant as demonstrated in succeeding sections as appropriate. The removal rate of RhB gets to almost 100% in the discharging process of this integrated system for 1 h. This work provides a proof-of-concept potential for applications in combing energy conversion with wastewater treatment technologies.
- This article is part of the themed collection: 2019 Journal of Materials Chemistry A HOT Papers