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In-situ synthesized porphyrin polymer/TiO2 composites as high-performance Z-scheme photocatalysts for CO2 conversion
- Source :
- Journal of Colloid and Interface Science. 596:342-351
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- The promising photocatalytic conversion of CO2 into valuable fuel promotes the development of photocatalyst through various methods. In this work, TiO2 nanoparticle was composited with covalent porphyrin polymers (COP-Ps) to fabricate composite photocatalysts. The resultant COP-Ps/TiO2 composites by in situ hydrothermal method exhibit much improved photocatalytic activity for the conversion of CO2 into CO relative to two components, and it is attributable to improved charge transfer between two moieties led by strong interaction. Especially, TiO2 is composited more evenly with the sulfonated hollow COP-P (sh-COP-P). The resultant composite sh-COP-P/TiO2 performs best with a CO production rate of 5.70 μmol·g−1·h−1, which is approximately 20.4 times as high as that of pure TiO2 and 2.3 times of sh-COP-P polymer. For comparison, the simple physical mixture of sh-COP-P and TiO2 (sm-sh-COP-P/TiO2) was fabricated, and it performs more badly due to poor mixing uniformity. A Z-scheme photocatalytic mechanism was proposed for sh-COP-P/TiO2 composite on the basis of energy band analysis and hydroxyl radical test. This study provides a new in situ strategy to fabricate organic polymer/metal oxide composites of high photocatalytic activity for CO2 reduction.
- Subjects :
- chemistry.chemical_classification
Materials science
Composite number
Oxide
02 engineering and technology
Polymer
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Porphyrin
Hydrothermal circulation
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Biomaterials
Metal
chemistry.chemical_compound
Colloid and Surface Chemistry
chemistry
Covalent bond
visual_art
Photocatalysis
visual_art.visual_art_medium
Composite material
0210 nano-technology
Subjects
Details
- ISSN :
- 00219797
- Volume :
- 596
- Database :
- OpenAIRE
- Journal :
- Journal of Colloid and Interface Science
- Accession number :
- edsair.doi...........84542cc58e4572c48d62d12a232dffd3