Construction of PDDA functionalized black phosphorus nanosheets/BiOI Z-scheme photocatalyst with enhanced visible light photocatalytic activity

Ruisen Jing; Junshan Yang; Shutao Li; Shifeng Zhao; Pengfei Wang; Yunyan Liu; Aiju Liu; Zilin Meng; Hongwei Huang; Zhilei Zhang; Qian Zhang

doi:10.1016/j.jcis.2020.04.103

Construction of PDDA functionalized black phosphorus nanosheets/BiOI Z-scheme photocatalyst with enhanced visible light photocatalytic activity

J Colloid Interface Sci. 2020 Sep 15:576:34-46. doi: 10.1016/j.jcis.2020.04.103. Epub 2020 Apr 27.

Authors

Ruisen Jing¹, Junshan Yang¹, Shutao Li², Shifeng Zhao¹, Pengfei Wang², Yunyan Liu², Aiju Liu³, Zilin Meng³, Hongwei Huang⁴, Zhilei Zhang⁵, Qian Zhang⁶

Affiliations

¹ School of Agricultural Engineering and Food Science, Shandong University of Technology, 255049 Zibo, PR China.
² School of Physics and Optoelectronic Engineering, Shandong University of Technology, 255049 Zibo, PR China.
³ School of Resources and Environmental Engineering, Shandong University of Technology, 255049 Zibo, PR China.
⁴ Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, 100083 Beijing, PR China.
⁵ CNPC Engineering Technology R&D Company Limited, PR China.
⁶ School of Resources and Environmental Engineering, Shandong University of Technology, 255049 Zibo, PR China. Electronic address: zq@sdut.edu.cn.

PMID: 32413779
DOI: 10.1016/j.jcis.2020.04.103

Abstract

The use of black phosphorus (BP) nanosheets has attracted much attention in the area of photocatalysis owing to the thickness-tunable bandgap and high carrier mobility. In order to improve the stability of BP nanosheets, poly dimethyldiallyl ammonium chloride (PDDA) is used to passivate the BP nanosheets and change its surface properties. The present study concerns the development of a facile electrostatic assembly method for the construction of a Z-scheme system consisting of PDDA-functionalized BP nanosheets and layered BiOI in order to enhance visible light adsorption and promote electron-hole separation. The morphology, structure and photoelectrochemical properties of the composites are thoroughly characterized and the photocatalytic performances of all the samples were assessed under visible light irradiation. The 5-F-BP/BiOI exhibits excellent photocatalytic activity with removal efficiencies of 97.6% and 90.0% for methylene blue (MB) and tetracycline (TC), respectively. Superoxide radicals (·O₂^-) were found to be the main organic decomposition products according to species trapping experiments. The photocatalyst presents favorable stability after three catalytic cycles. This study provides new insights into the design of highly efficient Z-scheme photocatalysts based on functionalized BP nanosheets in order to meet environmental demands.

Keywords: Bismuth oxyiodide; Functionalized black phosphorus nanosheets; Photocatalysis; Z-scheme.