TY - JOUR
T1 - Constructing Pd/ferroelectric Bi4Ti3O12 nanoflake interfaces for O2 activation and boosting NO photo-oxidation
AU - Zhang, Qian
AU - Shi, Yuanyu
AU - Shi, Xianjin
AU - Huang, Tingting
AU - Lee, Shuncheng
AU - Huang, Yu
AU - Cao, Junji
N1 - Funding Information:
Q. Zhang gratefully acknowledges the National Key Research and Development Program of China ( 2016YFA0203000 ), the funding from the National Natural Science Foundation of China (Grant No. 21707142 ), the Youth Innovation Promotion Association ( 2021413 ) and the West Light Foundation ( XAB2018B06 ) of the Chinese Academy of Sciences for the support.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/3
Y1 - 2022/3
N2 - Photo-oxidative NO
x removal often encountered with sluggish charge carrier separation kinetics and poor selectivity. Herein, Pd/ferroelectric Bi
4Ti
3O
12 nanoflakes (Pd/BTO NF) were constructed to investigate the photo-excited charge separation, O
2 activation and the generated reactive oxygen species (ROS) in dictating NO removal. Results showed that the depolarization field of ferroelectric BTO NF significantly promoted bulk charge separation, leading to boosted NO removal reaction kinetics (10 times higher) for Pd/BTO NF comparing with Pd/TiO
2. Revealed by electronic paramagnetic resonance and radical scavenging tests, it is observed that the primary O
2 activation species differed among Pd, Ag and Pt supported BTO NF photocatalysts, which resulted in different selectivity. The underlying mechanism of NO photo-oxidative conversion pathway was studied by in situ diffuse reflectance infrared Fourier transform spectroscopy. This work illustrate that metal/ferroelectric interfaces can be tuned to obtain differing O
2 activation species, and notable selectivity changes in photocatalysis mediated environmental remediation reactions.
AB - Photo-oxidative NO
x removal often encountered with sluggish charge carrier separation kinetics and poor selectivity. Herein, Pd/ferroelectric Bi
4Ti
3O
12 nanoflakes (Pd/BTO NF) were constructed to investigate the photo-excited charge separation, O
2 activation and the generated reactive oxygen species (ROS) in dictating NO removal. Results showed that the depolarization field of ferroelectric BTO NF significantly promoted bulk charge separation, leading to boosted NO removal reaction kinetics (10 times higher) for Pd/BTO NF comparing with Pd/TiO
2. Revealed by electronic paramagnetic resonance and radical scavenging tests, it is observed that the primary O
2 activation species differed among Pd, Ag and Pt supported BTO NF photocatalysts, which resulted in different selectivity. The underlying mechanism of NO photo-oxidative conversion pathway was studied by in situ diffuse reflectance infrared Fourier transform spectroscopy. This work illustrate that metal/ferroelectric interfaces can be tuned to obtain differing O
2 activation species, and notable selectivity changes in photocatalysis mediated environmental remediation reactions.
KW - Air pollution
KW - Ferroelectric polarization
KW - O activation
KW - Perovskite nanomaterials
KW - Photocatalysis
UR - http://www.scopus.com/inward/record.url?scp=85118902482&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2021.120876
DO - 10.1016/j.apcatb.2021.120876
M3 - Journal article
VL - 302
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
SN - 0926-3373
M1 - 120876
ER -