1. Promoted photocatalytic N2 fixation to ammonia over floatable TiO2/Bi/Carbon cloth through relay pathway.
- Author
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Li, Yaru, Li, Rui, Sun, Zijun, Guo, Lijun, Wang, Yawen, Ma, Xiaoli, Li, Houfen, Lei, Tao, Fan, Caimei, and Liu, Jianxin
- Subjects
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CARBON fibers , *TITANIUM dioxide , *AMMONIA , *NITROGEN , *DISPLAY systems - Abstract
[Display omitted] • The floatable TiO 2 /Bi/CC exhibited higher ammonia activity than powder TiO 2 /Bi. • The newly relay photocatalysis mechanism (N 2 → NO 3 − → NH 3) took place on TiO 2 /Bi/CC. • The Bi component in TiO 2 /Bi/CC promoted the NO 3 − → NO 2 − step occurring spontaneously. • The photocatalytic N 2 fixation product solution was successfully applied in lettuce cultivation. The floatable photocatalyst at N 2 -water interface allows the adequate supply of N 2 reactant and the utilization of photothermal energy for photocatalytic N 2 fixation, however, the presence of non-volatile NO 3 − product poses a challenge to the stability as it easily covers the catalytic active sites. Herein, a floatable TiO 2 /Bi/CC (Carbon cloth) photocatalyst was designed, in which the non-volatile NO 3 − can be transformed to the volatile NH 3 via the newly synergistic relay photocatalysis pathway (N 2 → NO 3 − → NH 3) between TiO 2 (N 2 → NO 3 −) and Bi (NO 3 − → NH 3). Attractively, the spontaneous NO 3 − → NO 2 − step occurs on Bi component to promote the relay pathway performing. Therefore, TiO 2 /Bi/CC system displays better long-term stability than TiO 2 /CC, and moreover, it achieves a higher NH 3 yield of 8.28 mmol L−1 h−1 g−1 (i.e. 4.14 mmol h−1 m−2) than that 1.46 mmol L−1 h−1 g−1 for TiO 2 /Bi powder. Importantly, the N 2 fixation products by TiO 2 /Bi/CC effectively promote lettuce growth and enhance lettuce nutrient contents, which further validates the feasibility of this system in large-scale application of crop cultivation. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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