High-efficiency photocatalytic degradation of RhB by protonation of g-C3N4 with Ag-loaded TiO2 nanofibers

Abstract

For organic pollution, photocatalytic degradation is a low-cost, high-efficiency, and no secondary pollution treatment method. In this paper, the degradation ability of organic pollutants when light is irradiated on Ag/g-C3N4/TiO2 ternary nanocomposites was studied. As a metal with excellent conductivity, Ag accelerates the electron transfer in the TiO2 conductive band, increases the life of electron-hole pairs, and produces a plasmon resonance effect on the boundary of TiO2, which enhances the absorption of visible light. In addition, g-C3N4 after proton treatment will form colloids and be covered on the surface of Ag/TiO2 nanofibers by electrostatic adsorption. This improved method can significantly improve the catalytic efficiency and is a relatively novel attempt in the field of carbon nitride. The photocatalytic degradation efficiency of nanocomposites is significantly improved, which overtop that of g-C3N4 and Ag/TiO2. The degradation efficiency of simulated pollutant rhodamine B solution is 1.9x that of pure titanium dioxide. The research work in this article provides a research foundation for metal element loaded and non-metal composite TiO2.