选择性
铁电性
光催化
光化学
材料科学
动力学
活性氧
氧气
漫反射红外傅里叶变换
光电子学
化学
催化作用
有机化学
电介质
物理
量子力学
生物化学
作者
Qian Zhang,Yuanyu Shi,Xianjin Shi,Ting‐Ting Huang,Shuncheng Lee,Yu Huang,Junji Cao
标识
DOI:10.1016/j.apcatb.2021.120876
摘要
Photo-oxidative NOx removal often encountered with sluggish charge carrier separation kinetics and poor selectivity. Herein, Pd/ferroelectric Bi4Ti3O12 nanoflakes (Pd/BTO NF) were constructed to investigate the photo-excited charge separation, O2 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/TiO2. Revealed by electronic paramagnetic resonance and radical scavenging tests, it is observed that the primary O2 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 O2 activation species, and notable selectivity changes in photocatalysis mediated environmental remediation reactions.
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