Constructing Schottky junctions via Pd nanosheets on DUT-67 surfaces to accelerate charge transfer

Mengyang Xu; Xiaoxue Zhao; Haopeng Jiang; Xianghai Song; Weiqiang Zhou; Xin Liu; Zhi Liu; Huiqin Wang; Pengwei Huo

doi:10.1016/j.jcis.2021.11.027

Constructing Schottky junctions via Pd nanosheets on DUT-67 surfaces to accelerate charge transfer

J Colloid Interface Sci. 2022 Feb 15;608(Pt 3):3022-3029. doi: 10.1016/j.jcis.2021.11.027. Epub 2021 Nov 11.

Authors

Mengyang Xu¹, Xiaoxue Zhao², Haopeng Jiang¹, Xianghai Song², Weiqiang Zhou², Xin Liu², Zhi Liu³, Huiqin Wang⁴, Pengwei Huo²

Affiliations

¹ Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China; Green Catalysis Center, College of Chemistry, Zhengzhou University, 450001, China.
² Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
³ Department of Chemistry, College of Science, Shantou University, Shantou, Guangdong 515063, PR China.
⁴ School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, PR China.

PMID: 34815078
DOI: 10.1016/j.jcis.2021.11.027

Abstract

The separation, transfer and recombination of charge often affect the rate of photocatalytic reduction of CO₂. Schottky junctions can promote the rapid separation of space charge. Therefore, in this paper, Pd nanosheets were grown on the surface of DUT-67 by a hydrothermal method, and a Schottky junction was constructed between DUT-67 and Pd. Under the action of the Schottky junction, the CO yield of 0.3-Pd/DUT-67 reached 12.15 μmol/g/h, which was 17 times higher than that of DUT-67. Efficient charge transfer was demonstrated in photochemical experiments. The large specific surface area and the increased light utilization rate also contributed to the increase in the CO₂ reduction efficiency. In addition, the mechanism of Pd/DUT-67 photocatalytic reduction of CO₂ was proposed.

Keywords: CO(2) reduction; MOFs; Pd nanosheet; Photocatalysis; Schottky junction.