Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 119974 |
| Fachzeitschrift | Applied Catalysis B: Environmental |
| Jahrgang | 291 |
| Frühes Online-Datum | 22 Feb. 2021 |
| Publikationsstatus | Veröffentlicht - 15 Aug. 2021 |
Abstract
A wet chemical-synthesized high surface area ultrafine Ta2O5 nanoparticle and its application to NOx control is reported. The as-synthesized photocatalyst is characterized using powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), electron paramagnetic resonance (EPR) spectroscopy, X-ray Photoelectron Spectroscopy (XPS), transient absorption spectroscopy (TAS), UV–vis diffuse reflectance spectroscopy, and N2 adsorption (BET). The catalytic performance of these Ta2O5 nanoparticles was evaluated towards the photodegradation of nitrogen oxides (NOx) under UV–vis irradiation at room temperature. In comparison to the commercial TiO2 (Aeroxide P25 powder: 20 % rutile/80 % anatase, 50 m2/g), traditionally considered state-of-the-art material for the NOx degradation, as-synthesized Ta2O5 (41 m2/g specific surface area) nanoparticles offers NOx remediation with minimal toxic NO2 and excellent stability under UV irradiation. A 2-fold increase in the UV-photonic-efficiency (∼0.64 %) of Ta2O5 is observed compared to TiO2 P25 (∼0.30 %). NO conversion using Ta2O5 was noted to be 18.6 % compared to 8.8 % for TiO2. The UV–vis photocatalytic activity is explained on the basis of the band structure modulation of Ta2O5 due to the intrinsic defects introduced during the synthesis of the material.
ASJC Scopus Sachgebiete
- Chemische Verfahrenstechnik (insg.)
- Katalyse
- Umweltwissenschaften (insg.)
- Allgemeine Umweltwissenschaft
- Chemische Verfahrenstechnik (insg.)
- Prozesschemie und -technologie
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in: Applied Catalysis B: Environmental, Jahrgang 291, 119974, 15.08.2021.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Photocatalytic NOx removal using tantalum oxide nanoparticles
T2 - A benign pathway
AU - Khanal, Vijay
AU - Balayeva, Narmina O.
AU - Günnemann, Carsten
AU - Mamiyev, Zamin
AU - Dillert, Ralf
AU - Bahnemann, Detlef W.
AU - Subramanian, Vaidyanathan (Ravi)
N1 - Funding Information: RSV would like to thank the Alexander von Humboldt foundation for supporting part of this activity. The funding for Vijay Khanal from the Chemical and Materials Engineering department is much appreciated.
PY - 2021/8/15
Y1 - 2021/8/15
N2 - A wet chemical-synthesized high surface area ultrafine Ta2O5 nanoparticle and its application to NOx control is reported. The as-synthesized photocatalyst is characterized using powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), electron paramagnetic resonance (EPR) spectroscopy, X-ray Photoelectron Spectroscopy (XPS), transient absorption spectroscopy (TAS), UV–vis diffuse reflectance spectroscopy, and N2 adsorption (BET). The catalytic performance of these Ta2O5 nanoparticles was evaluated towards the photodegradation of nitrogen oxides (NOx) under UV–vis irradiation at room temperature. In comparison to the commercial TiO2 (Aeroxide P25 powder: 20 % rutile/80 % anatase, 50 m2/g), traditionally considered state-of-the-art material for the NOx degradation, as-synthesized Ta2O5 (41 m2/g specific surface area) nanoparticles offers NOx remediation with minimal toxic NO2 and excellent stability under UV irradiation. A 2-fold increase in the UV-photonic-efficiency (∼0.64 %) of Ta2O5 is observed compared to TiO2 P25 (∼0.30 %). NO conversion using Ta2O5 was noted to be 18.6 % compared to 8.8 % for TiO2. The UV–vis photocatalytic activity is explained on the basis of the band structure modulation of Ta2O5 due to the intrinsic defects introduced during the synthesis of the material.
AB - A wet chemical-synthesized high surface area ultrafine Ta2O5 nanoparticle and its application to NOx control is reported. The as-synthesized photocatalyst is characterized using powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), electron paramagnetic resonance (EPR) spectroscopy, X-ray Photoelectron Spectroscopy (XPS), transient absorption spectroscopy (TAS), UV–vis diffuse reflectance spectroscopy, and N2 adsorption (BET). The catalytic performance of these Ta2O5 nanoparticles was evaluated towards the photodegradation of nitrogen oxides (NOx) under UV–vis irradiation at room temperature. In comparison to the commercial TiO2 (Aeroxide P25 powder: 20 % rutile/80 % anatase, 50 m2/g), traditionally considered state-of-the-art material for the NOx degradation, as-synthesized Ta2O5 (41 m2/g specific surface area) nanoparticles offers NOx remediation with minimal toxic NO2 and excellent stability under UV irradiation. A 2-fold increase in the UV-photonic-efficiency (∼0.64 %) of Ta2O5 is observed compared to TiO2 P25 (∼0.30 %). NO conversion using Ta2O5 was noted to be 18.6 % compared to 8.8 % for TiO2. The UV–vis photocatalytic activity is explained on the basis of the band structure modulation of Ta2O5 due to the intrinsic defects introduced during the synthesis of the material.
KW - NOx
KW - Oxidation
KW - Photocatalysis
KW - Pollution abatement
KW - TaO
UR - http://www.scopus.com/inward/record.url?scp=85102260923&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2021.119974
DO - 10.1016/j.apcatb.2021.119974
M3 - Article
AN - SCOPUS:85102260923
VL - 291
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
SN - 0926-3373
M1 - 119974
ER -