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Ultralow-temperature synthesis of small Ag-doped carbon nitride for nitrogen photofixation

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Abstract

By using small-sized metal particles homogeneously dispersed on a support, the performance of a catalyst can be improved and high-cost metal can be saved. Preparing homogeneously dispersed Ag0/g-C3N4 as a N2 photofixation catalyst is a challenge. In the past, for its preparation as a photocatalyst, surfactants have to be used, and the preparation process is time consuming and high cost. Herein, a one-pot method is used to prepare homogeneously dispersed Ag0/g-C3N4 as an efficient N2 photofixation catalyst by the reduction–deposition method at ultra-low temperature (−60 °C). The characterizations and N2 photofixation results show that small-sized Ag particles promote N2 adsorption and generate more photo-generated electrons–holes. Meanwhile, they improve the electron/hole separation efficiency. The N2 photocatalytic activity of the catalyst is 1.4 and 15 times higher than that of larger-sized Ag/C3N4 and pristine C3N4, respectively. The advantages of the catalyst are saving Ag, quantum size effects, and improving metal–support interactions. The process can be used to prepare state-of-the-art photocatalysts for N2 photofixation.

Graphical abstract: Ultralow-temperature synthesis of small Ag-doped carbon nitride for nitrogen photofixation

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Article information


Submitted
31 Jul 2020
Accepted
17 Sep 2020
First published
17 Sep 2020

Catal. Sci. Technol., 2020, Advance Article
Article type
Paper

Ultralow-temperature synthesis of small Ag-doped carbon nitride for nitrogen photofixation

Y. Wang, R. Zhao, F. Wang, Y. Liu, X. Yu, L. Chen, Y. Yao, S. Lu and X. Liao, Catal. Sci. Technol., 2020, Advance Article , DOI: 10.1039/D0CY01532F

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