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Efficient solar-driven H2O2 synthesis in-situ and sustainable activation to purify water via cascade reaction on ZnIn2S4-based heterojunction.
- Source :
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Chemical Engineering Journal . 2022 Part 3, Vol. 430, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
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Abstract
- A fantastic 2D/1D hierarchical layered ZnIn 2 S 4 /TiO 2 hetero-structure is reported as an efficient catalyst for in- situ H 2 O 2 production via 2-electrons oxygen reduction (ORR) process and be activated to high concentration hydroxyl radical (•OH) for water purification under visible light irradiation. [Display omitted] • Solar-driven H 2 O 2 synthesis to purify water via cascade reaction. • A fantastic 2D/1D hierarchical layered heterojunction of ZnIn 2 S 4 /TiO 2. • ZnIn 2 S 4 effectively promote the activation of in- situ generated H 2 O 2. • The superior H 2 O 2 production rate arrives 1530.59 μmol h−1 g−1. Hydrogen peroxide (H 2 O 2) is a significant green oxidant for environment and new energy, especially for Fenton-like system. Onsite production and sustainable consumption of H 2 O 2 are the two critical challenges. Here, a fantastic 2D/1D hierarchical layered ZnIn 2 S 4 /TiO 2 heterojunction is reported as an efficient catalyst for in- situ H 2 O 2 production via 2-electrons oxygen reduction (ORR) process and be rapidly activated to high concentration hydroxyl radical (•OH) for water purification under visible light irradiation. The high-quality catalyst enables superior H 2 O 2 production rate of 1530.59 μmol h−1 g−1 with an external quantum efficiency of 10.39% illuminated at 400 nm, is much higher than that of reported photocatalysts. The bimetallic sulfide ZnIn 2 S 4 can effectively promote the activation of H 2 O 2 due to the unsaturation of sulfur atoms, so that the wastewater containing tetracycline (50 ppm) can be degraded by 90% only within 60 min by ZnIn 2 S 4 /TiO 2 via this cascade reaction. This work provides a novel strategy and ZnIn 2 S 4 -based catalyst for photocatalytic Fenton-like reaction. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13858947
- Volume :
- 430
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Journal
- Publication Type :
- Academic Journal
- Accession number :
- 154110521
- Full Text :
- https://doi.org/10.1016/j.cej.2021.133039