Photo-Fenton Catalysis Degradation Of 4-Dodecylmorpholine By Heterogeneous Microprocessor Cu 2 O/Sno 2

Abstract

The increasing demand for potash has led to an increase in the use of 4-dodecylmorpholine (DMP), an important froth flotation agent for the extraction of potash by “reverse flotation-cold crystallisation”. As it is not easy to be stable and decompose in its natural state, it has seriously endangered the environment of salt lakes and the development of salt lake resources. The development of a safe and harmless catalytic system to accomplish the degradation and removal of DMP is urgent. Herein, A Cu2O/SnO2/PDA (CSP) heterogeneous microprocessor with a synergistic effect of photocatalysis and Fenton-like catalysis was developed, and the CSP had a good photothermal conversion efficiency. Under 808nm NIR irradiation, not only the catalyst activity was enhanced, but also the complexation rate of electron-hole pairs was reduced, which effectively increased the catalytic rate. In addition, by analysing the degradation products of DMP, the possible pathways of DMP degradation process were proposed and, at the same time, the degradation catalytic system we used was proved to be safe and harmless. A new pathway is provided for the degradation and removal of DMP in the salt lake environment.

Keywords: 4-Dodecylmorpholine, Photocatalysis, Fenton-like catalysis, Flotation agent, Degradation.