Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 277, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119200
Keywords
NO removal; Layered double hydroxide; Photocatalysis; Oxygen vacancy; Reactive oxidative species
Funding
- National Natural Science Foundation of China [51978110, 51878105]
- Program for the Top Young Talents of Chongqing, Innovation group of new technologies for industrial pollution control of Chongqing Education Commission [CXQT19023]
- Science and Technology Research Program of Chongqing Municipal Education Commission [KJQN201800829, KJZD-M201900802, KJZD-K201900502]
Ask authors/readers for more resources
We demonstrated the partial Ni2+ substitution for Mg2+ in Mg2Al-layered double hydroxide nanosheet (Ni/LDH) significantly improved its photocatalytic performance in removing the ppb-level NO pollutant from air. With 25 % of Mg2+ substituted, the Ni/LDH delivered the highest NO removal efficiency of 42.10 % (87.2 % of them were mineralized to nitrate) under UV-light irradiation. Such a robust performance with the low energy input (8 W) made Ni/LDH among the top photocatalysts for NO removal. We evidenced the OH- carried by Ni/ LDH transformed to center dot OH radicals by trapping the photoexcited holes. This unique feature was intriguing as the OH- at layer surfaces of LDH were abundant, fully exposed and dynamically supplemented by atmospheric water, which endowed Ni/LDH with superior center dot OH production capability even under low atmospheric moistures. The positive contribution of Ni2+ arose from its function in optimizing band structure and activating the OH- of LDH, leading to enhanced reactive oxidative species production.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available