Lattice distortion SnS₂ piezoelectric self-Fenton system for efficient degradation and detoxification of pollutants

Both piezoelectricity and self-Fenton catalysis are effective ways to degrade water pollution, but little research has combined them to construct a more efficient water pollution treatment method. Here, a Fe-doped SnS₂ (Sn₁₋ₓFexS₂) piezoelectric self-Fenton system was constructed, which shows superior water treatment performance. The best piezoelectric properties of the Sn₀.₉₇Fe₀.₀₃S₂ system were verified by degrading rhodamine B (RhB). The toxicity analysis of degradation intermediates and solutions confirmed that the toxicity of RhB decreased after degradation. In addition, Kelvin probe force microscopy and photoelectrochemical analysis confirmed the better piezoelectric properties of Sn₀.₉₇Fe₀.₀₃S₂. It has demonstrated the enhancement of systematic piezoelectricity by Fe lattice defects and the formation of self-Fenton by Fe as an active center in the degradation of RhB. In this work, an efficient piezoelectric and self-Fenton technology is constructed to remove organic pollutants from water, which is significant for developing water treatment technology.

Runren Jiang, Guanghua Lu, Min Wang, Yufang Chen, Jianchao Liu, Zhenhua Yan, Haijiao Xie