Shuguang Li, Zhiyu Liu, Congcong Piao, Jun Wang

College of Chemistry, Liaoning University

Zhihui Qu, Jize Liu, Youtao Song

School of Environment, Liaoning University

Duo Xu, Xiaojing Li

Alashan League Quality Inspection Center of Agricultural and Livestock Products

Abstract

It is first reported that an all-solid-state Z-scheme NaNbO₃-Au-Sn₃O₄ nanocomposite photocatalyst can be prepared by ultrasonic dispersion and calcination methods. In NaNbO₃-Au-Sn₃O₄, NaNbO₃ and Sn₃O₄ form a Z-scheme photocatalytic system, Au as an electron transfer channel accelerates the flow rate of the photo-induced electrons. Their effective combination can not only improve the utilization ratio of sunlight but also achieve the effective segregation of photo-induced electron-hole pairs. The fabricated samples were characterized by XRD, Raman spectra, SEM, TEM, UV-vis DRS, XPS and PL. In addition, the activity of the NaNbO₃-Au-Sn₃O₄ photocatalyst was researched via the photocatalytic degradation of carbofuran in wastewater under sunlight irradiation. The sunlight illumination time, NaNbO₃ and Sn₃O₄ mole ratio, cycle number and pesticides types as influence factors on the photocatalytic degradation efficiency of Z-scheme NaNbO₃-Au-Sn₃O₄ photocatalyst are investigated in detail. The possible mechanism and degradation pathways for the photocatalytic degradation of carbofuran caused by Z-scheme NaNbO₃-Au-Sn₃O₄ photocatalyst under sunlight irradiation are put forward. The research results show that the all-solid-state Z-scheme NaNbO₃-Au-Sn₃O₄ photocatalyst displays a wonderful activity for degradation of carbofuran in wastewater.

Read the article here:   12-An all-solid-state Z-scheme NaNbO3-Au-Sn3O4 photocatalyst for effective degradation of carbofuran under sunlight irradiation. Journal of Photochemistry and Photobiology A- Chemistry.pdf