Defective domain control of TiO2 support in Pt/TiO2 for room temperature formaldehyde (HCHO) remediation
| Autor: | Jongsoo Jurng, Byoung Chan Kim, Waleed Ahmad, Jin Young Kim, Eunseuk Park, Youngtak Oh, Heehyeon Lee |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Anatase
Materials science Formaldehyde General Physics and Astronomy chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Oxygen Catalysis law.invention Metal chemistry.chemical_compound law Oxidation state Electron paramagnetic resonance Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Surfaces Coatings and Films chemistry Chemical engineering visual_art visual_art.visual_art_medium 0210 nano-technology Space velocity |
| Zdroj: | Applied Surface Science. 538:147504 |
| ISSN: | 0169-4332 |
| Popis: | Sustainable and effective formaldehyde (HCHO) remediation at room temperature has significant potential in next-generation indoor environment purification technology. Herein, defective anatase TiO2 was synthesized using chemical vapor condensation (CVC) and was subsequently impregnated with 0.08 wt% Pt. The resulting Pt/CVC-TiO2 catalyst was used for the room-temperature conversion of HCHO and exhibited a HCHO removal efficiency of 80% under continuous flow conditions (GHSV 100,000 cm3 h−1 gcat−1) with an initial concentration of 10 ppm with good stability over 600 min. The characterization results confirmed the metallic oxidation state (Pt0), oxygen vacancies (mainly F centers), disordered domains, and strong interaction between Pt and defective TiO2 were essential for high activity. Moreover, electron paramagnetic resonance (EPR) analysis showed the consistent stability of the defective domains of CVC-TiO2, imparting catalytic stability over multiple cycles. This study highlights the synergistic relationship between oxygen vacancies in the TiO2 support and the resulting HCHO oxidation functionality. |
| Databáze: | OpenAIRE |
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