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Preparation of flexible Pt/TiO2/γ-Al2O3 nanofiber paper for room-temperature HCHO oxidation and particulate filtration
- Source :
- Chemical Engineering Journal. 427:130951
- Publication Year :
- 2022
- Publisher :
- Elsevier BV, 2022.
-
Abstract
- A flexible Pt/TiO2/γ-Al2O3 nanfiber paper (PTA) was successfully prepared by an electrospinning-coating-NaBH4 reduction method. The catalytic performance for formaldehyde (HCHO) oxidation over PTA with different Pt contents was investigated at room temperature. The results show that PTA exhibits higher catalytic activity and stability than Pt/γ-Al2O3. The TiO2 coating can promote the transformation of intermediate species and the desorption of CO2. The PTA1 with 1 wt% Pt shows the best catalytic activity and good stability. In the view of activity and cost, 0.5 wt% Pt is the optimal Pt content. The TiO2 coating not only plays an important role in improving the activity and stability of PTA, but also acts as a protective shell of γ-Al2O3 fiber, which greatly reduces the risk of alkali etching during preparation and maintains the good flexibility of PTA. The dioxymethylene (DOM), formate/carbonate species, CO are the intermediate species in HCHO oxidation over PTA. In addition, PTA exhibits good filtration performance for fine particles as well as good fluid permeability. Because of the high efficiency and flexibility of PTA composite catalytic material for HCHO oxidation with good filtration performance for fine particles, it will be a promising candidate in air purification.
- Subjects :
- Materials science
General Chemical Engineering
Formaldehyde
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Alkali metal
01 natural sciences
Industrial and Manufacturing Engineering
0104 chemical sciences
Catalysis
law.invention
chemistry.chemical_compound
chemistry
Chemical engineering
law
Nanofiber
Desorption
otorhinolaryngologic diseases
Environmental Chemistry
Formate
Fiber
0210 nano-technology
Filtration
Subjects
Details
- ISSN :
- 13858947
- Volume :
- 427
- Database :
- OpenAIRE
- Journal :
- Chemical Engineering Journal
- Accession number :
- edsair.doi...........2f04ae5e87a8b88c0be5e03f8721c65d