期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 585, 期 -, 页码 20-29出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.11.064
关键词
MXene; TiO2; Co-modified; Photocatalytic nitrogen fixation
资金
- National Natural Science Foundation of China [21802078, 21965027]
- Natural Science Foundation of Ningxia, China [2018AAC03053]
- National First-rate Discipline Construction Project of Ningxia: Chemical Engineering and Technology [NXY-LXK2017A04]
- Scientific Research Foundation of the Higher Education Institutions of Ningxia [NGY2018028]
Modulating the binding of reactants or products with catalysts is an effective way to enhance photocatalytic activity. Introducing Co into MXene@TiO2 catalysts adjusts surface reactivity, promoting product desorption and active site efficiency. The optimal catalyst shows remarkable NH4+ production and stability.
Modulation of the binding of the reactant or product species with catalysts is an effective approach to optimize the photocatalytic activity. Herein, we explored the relationship between the binding of reactant (N-2) and product (NH3) with catalyst and the photocatalytic nitrogen fixation activity. The surface reactivity of nitrogen with water was tuned by introducing Co into the MXene@TiO2 catalysts, which the TiO2 nanoparticle derived from the in-situ growth on the surface of MXene nanosheets. Co modified adjusted the chemisorption equilibrium of the catalyst for reactant (N-2) and product (NH3), thus promoted product desorption and efficiency of the active site. Remarkably, the optimal catalyst (MXene/TiO2/Co-0.5%) exhibited outstanding NH4+ production rate (110 mu mol g(-1) h(-1)) and excellent stability in pure water without any hole sacrificial agent under Ultraviolet-Visible (UV-vis) light in N-2 and air ambient. (C) 2020 Elsevier Inc. All rights reserved.
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