Journal
ACS APPLIED NANO MATERIALS
Volume 5, Issue 3, Pages 3581-3590Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.1c04210
Keywords
microwave synthesis; carbon nanotubes; CeO2 mesocrystals; photocatalysis; NO oxidation
Funding
- National Key Research and Development Program of China [2020YFA0211004]
- National Natural Science Foundation of China [21876112, 21876113, 22022608, 92034301, 22106105]
- 111 Innovation and Talent Recruitment Base on Photochemical and Energy Materials [D18020]
- Ministry of Education
- Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Engineering Research Center of Green Energy Chemical Engineering [18DZ2254200]
- Shanghai government [18SG41, 309-AC9103-21-413002, 2019-0107-00-E00015]
- Shanghai Scientific and Technological Innovation Project [19JC1410402, 21DZ1206300]
- Program for Professor of Special Appointment (Eastern Scholar) at the Shanghai Institutions of Higher Learning and Shanghai Sailing Program [20YF1432100]
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In this study, a series of carbon nanotube (CNT)-threaded CeO2 mesocrystalline photocatalysts were synthesized using the microwave thermal method. The noncontinuous CNT-threaded structure provided two interfacial charge transport pathways for efficient separation of photogenerated carriers. The introduction of CNTs induced surface Ce3+ and oxygen vacancies in mesocrystalline CeO2, enhancing adsorption and activation of reactants and facilitating a deep oxidation pathway for NO removal. The optimal photocatalyst exhibited remarkable conversion ratio for NO oxidation and NO3- selectivity in a recyclable way.
The synthesis of photocatalysts with rapid photogenerated electron transfer, strong reactant adsorption, and activation is urgent to promote photocatalytic NO oxidation. Herein, we construct a series of carbon nanotube (CNT)-threaded CeO2 mesocrystalline photocatalysts applying the microwave thermal method. The noncontinuous CNT-threaded structure provides two interfacial charge transport pathways for the efficient separation of photogenerated carriers. The introduction of CNTs induces mesocrystalline CeO2 with surface Ce3+ and oxygen vacancies, which is in favor of adsorption and activation for reactants, further facilitating a deep oxidation pathway for NO removal. The optimal photocatalyst exhibits a remarkable conversion ratio for NO oxidation and NO3- selectivity in a recyclable way.
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