Back to Search
Start Over
Recyclable CoFe2O4 modified BiOCl hierarchical microspheres utilizing photo, photothermal and mechanical energy for organic pollutant degradation
- Source :
- Nano Energy. 89:106403
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Taking advantage of multiple energy sources is an effective way to enhance the catalytic efficiency of a catalytic system. Here, through rational design, we fabricated CoFe2O4 modified BiOCl hierarchical microspheres (CFO-BiOCl), which not only can make full use of photo, photothermal and mechanical energy but also can be easily recycled from liquid solutions. Photocatalytic activity measurement showed that CFO-BiOCl samples possessed outstanding photocatalytic activity, evident with 99% of rhodamine B decomposed in 5 min and 90% of tetracycline hydrochloride degraded in 10 min under full-spectrum light irradiation. Furthermore, piezo-/photocatalytic degradation rates of tetracycline hydrochloride, bisphenol A and phenol were around 2, 3 and 8 times higher than photocatalytic degradation rates under low-intensity light irradiation. Recycling tests showed that the piezo-/photocatalytic activity of CFO-BiOCl hardly decreased after 5 cycles. The excellent photocatalytic performance of CFO-BiOCl catalysts can be attributed to suitable band alignment of CoFe2O4 and BiOCl and photothermal effect that elevates organic pollutant molecules into a more active state. The generation of piezoelectric field in BiOCl crystals, providing strong driven force for the separation of photo-induced electrons and holes, gives rise to the high piezo-/photocatalytic efficiency. This work may bring a design pattern to fabricate catalysts that can utilize multiple energy sources and give a thorough discussion in the catalytic mechanism.
- Subjects :
- Materials science
Renewable Energy, Sustainability and the Environment
Photothermal effect
Photothermal therapy
Catalysis
chemistry.chemical_compound
chemistry
Chemical engineering
Rhodamine B
Photocatalysis
Degradation (geology)
Phenol
General Materials Science
Electrical and Electronic Engineering
Energy source
Subjects
Details
- ISSN :
- 22112855
- Volume :
- 89
- Database :
- OpenAIRE
- Journal :
- Nano Energy
- Accession number :
- edsair.doi...........82581088cc821990ae95fa5c45c55938