Dye-Sensitized Fe-MOF nanosheets as Visible-Light driven photocatalyst for high efficient photocatalytic CO2 reduction

Ahmed Mahmoud Idris; Xinyan Jiang; Jun Tan; Zhenzhi Cai; Xiaodan Lou; Jin Wang; Zhengquan Li

doi:10.1016/j.jcis.2021.09.014

Dye-Sensitized Fe-MOF nanosheets as Visible-Light driven photocatalyst for high efficient photocatalytic CO₂ reduction

J Colloid Interface Sci. 2022 Feb;607(Pt 2):1180-1188. doi: 10.1016/j.jcis.2021.09.014. Epub 2021 Sep 8.

Authors

Ahmed Mahmoud Idris¹, Xinyan Jiang¹, Jun Tan¹, Zhenzhi Cai¹, Xiaodan Lou¹, Jin Wang¹, Zhengquan Li²

Affiliations

¹ Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, Zhejiang 321004, PR China.
² Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, Zhejiang 321004, PR China. Electronic address: zqli@zjnu.edu.cn.

PMID: 34571305
DOI: 10.1016/j.jcis.2021.09.014

Abstract

Dye-sensitized system holds great potential for the development of visible-light-responsive photocatalysts not only because it can enhance the light absorption and charge separation efficiency of the systems but also because it can tune the band structure of catalysts. Herein, two-dimensional (2D) Fe-MOF nanosheets (Fe-MNS) with a LUMO potential of 0.11 V (vs. RHE) was prepared. Interestingly, it has been found that when the 2D Fe-MNS catalyst was functionalized with visible-light-responsive [Ru(bpy)]₃²⁺ as a dye-sensitizer, the electrons from the [Ru(bpy)]₃²⁺ can effectively inject into the 2D Fe-MNS, which resulted in a negative shift of the LUMO potential of the 2D Fe-MNS to -0.15 V (vs. RHE). Consequently, the [Ru(bpy)]₃²⁺/Fe-MNS catalytic system exhibits a sound photocatalytic CO₂-to-CO activity of 1120 μmol g^-1h^-1 under visible-light-irradiation. The photocatalytic CO production was further ameliorated by regulating the electronic structure of the 2D Fe-MNS by doping Co ions, achieving a remarkable photocatalytic activity of 1637 μmol g^-1h^-1. This work further supports that the dye-sensitized system is an auspicious strategy worth exploring with different catalysts for the development of visible-light-responsive photocatalytic systems.

Keywords: CO(2) reduction; Dye-sensitization; Metal–organic frameworks; Photocatalysts.