2D/2D Schottky heterojunction of in-situ growth FAPbBr3/Ti3C2 composites for enhancing photocatalytic CO2 reduction

Meidan Que; Weihua Cai; Yang Zhao; Yawei Yang; Boyue Zhang; Sining Yun; Jin Chen; Gangqiang Zhu

doi:10.1016/j.jcis.2021.11.094

2D/2D Schottky heterojunction of in-situ growth FAPbBr₃/Ti₃C₂ composites for enhancing photocatalytic CO₂ reduction

J Colloid Interface Sci. 2022 Mar 15:610:538-545. doi: 10.1016/j.jcis.2021.11.094. Epub 2021 Nov 19.

Authors

Meidan Que¹, Weihua Cai², Yang Zhao², Yawei Yang³, Boyue Zhang², Sining Yun², Jin Chen⁴, Gangqiang Zhu⁵

Affiliations

¹ College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China; State Key Laboratory of Green Building in Western China, Xi'an University of Architecture and Technology, Xi'an 710055, PR China. Electronic address: mdque@xauat.edu.cn.
² College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China.
³ School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China.
⁴ College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China. Electronic address: jinchen@xauat.edu.cn.
⁵ School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, PR China.

PMID: 34838312
DOI: 10.1016/j.jcis.2021.11.094

Abstract

Mimicking the natural photosynthesis process to convert carbon dioxide into value-added chemicals is vital to solving both the climate crisis worldwide and the depletion of fossil fuels. Herein, we explore the synthesis of 2D FAPbBr₃ nanoplate combined with 2D Ti₃C₂ nanosheet to form a 2D/2D FAPbBr₃/Ti₃C₂ Schottky heterojunction using facile hot-injection and in-situ growth approaches. The Schottky heterojunction of FAPbBr₃/Ti₃C₂ over large interfacial contact provides abundant channels for transferring photogenerated carriers from FAPbBr₃ nanoplate to Ti₃C₂ nanosheet. The experimental results showed a CO yield of 93.82 μmol·g^-1·h^-1 with ethyl acetate/deionization water as a sacrificial reagent for FAPbBr₃/Ti₃C₂ composite, which was 1.25-fold enhancement that on pristine FAPbBr₃ nanoplates. The large 2D heterointerface can efficiently accelerate the spatial separation and transfer of photogenerated carriers and result in the superior photocatalytic activity and favorable stability of FAPbBr₃/Ti₃C₂ photocatalysts, which are proved by in-situ X-ray photoelectron spectroscopy, photoluminescence, transient absorption spectra, and Mott-Schottky measurement. Thus, this work unveils that 2D/2D Schottky heterostructures would significantly improve the reaction activities of halide perovskite-based photocatalysts.

Keywords: 2D/2D Schottky Heterojunction; CO(2) Photoreduction; FAPbBr(3) nanoplates; FAPbBr(3)/Ti(3)C(2) photocatalysis.