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Abstract
Piezoelectric fields can decrease the recombination rate of photogenerated electrons and holes in semiconductors and therewith increase their photocatalytic activities. Here, a BaTiO3/WS2 composite is synthesized and characterized, which combines piezoelectric BaTiO3 nanofibers and WS2 nanosheets. The piezo-photocatalytic effect of the composite on the persulfate activation is studied by monitoring Ofloxacin (OFL) degradation efficiency. Under mechanical forces, LED lamp irradiation, and the addition of 10?mM persulfate, the OFL degradation efficiency reaches ~90% within 75?min, which is higher than efficiencies obtained for individual BaTiO3, WS2, or TiO3, widely used photocatalysts in the field of water treatment. The boosted degradation efficiency can be ascribed to the promotion of charge carrier separation, resulting from the synergetic effect of the heterostructure and the piezoelectric field induced …
