Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 42, Pages 22963-22969Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202110336
Keywords
large scale application; multifunctional bilayer paper; photocatalysis; photothermal; triphase system
Categories
Funding
- National Key Projects for Fundamental Research and Development of China [2018YFB1502002]
- National Natural Science Foundation of China [51825205, 51772305, 21902168]
- Beijing Natural Science Foundation [2191002]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB17000000]
- Royal Society-Newton Advanced Fellowship [NA170422]
- International Partnership Program of Chinese Academy of Sciences [GJHZ201974]
- Youth Innovation Promotion Association of the CAS
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Photocatalysis using a scalable bilayer paper for photothermal-assisted triphase photocatalysis has shown significantly improved reaction rates compared to traditional diphasic systems, achieving high mineralization of phenol through enhanced oxygen diffusion and interfacial photothermal effects. The system also demonstrated high stability and sunlight-driven feasibility, indicating its potential for large-scale photocatalytic applications integrated into a triphase flow reactor.
Photocatalysis as one of the future environment technologies has been investigated for decades. Despite great efforts in catalyst engineering, the widely used powder dispersion and photoelectrode systems are still restricted by sluggish interfacial mass transfer and chemical processes. Here we develop a scalable bilayer paper from commercialized TiO2 and carbon nanomaterials, self-supported at gas-liquid-solid interfaces for photothermal-assisted triphase photocatalysis. The photogeneration of reactive oxygen species can be facilitated through fast oxygen diffusion over triphase interfaces, while the interfacial photothermal effect promotes the following free radical reaction for advanced oxidation of phenol. Under full spectrum irradiation, the triphase system shows 13 times higher reaction rate than diphase controlled system, achieving 88.4 % mineralization of high concentration phenol within 90 min full spectrum irradiation. The bilayer paper also exhibits high stability over 40 times cycling experiments and sunlight driven feasibility, showing potentials for large scale photocatalytic applications by being further integrated into a triphase flow reactor.
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