Ultralow-temperature synthesis of small Ag-doped carbon nitride for nitrogen photofixation
Ultralow-temperature synthesis of small Ag-doped carbon nitride for nitrogen photofixation
复制标题
超低温合成小型银掺杂碳氮化物用于氮光固定
DOI：
10.1039/d0cy01532f
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发表时间：
2020-11-21
影响因子：
5
通讯作者：
Liao, Xiaoyuan
中科院分区：
文献类型：
--
作者：
Wang, Yingzhi;Zhao, Rui;Liao, Xiaoyuan
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 Ag-0/g-C3N4 as a N-2 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 Ag-0/g-C3N4 as an efficient N-2 photofixation catalyst by the reduction-deposition method at ultra-low temperature (-60 degrees C). The characterizations and N-2 photofixation results show that small-sized Ag particles promote N-2 adsorption and generate more photo-generated electrons-holes. Meanwhile, they improve the electron/hole separation efficiency. The N-2 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 N-2 photofixation.
