☆ 4.7 Article

Construction of a novel S-scheme heterojunction piezoelectric photocatalyst V-BiOIO3/FTCN and immobilization with floatability for tetracycline degradation

JOURNAL OF HAZARDOUS MATERIALS (2023)

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JOURNAL OF HAZARDOUS MATERIALS
Volume 443, Issue -, Pages -

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ELSEVIER
DOI: 10.1016/j.jhazmat.2022.130251

Keywords

Piezoelectric photocatalyst; Floatable carbon nitride; V-BiOIO3; Photocatalytic Immobilization; S-scheme Heterojunction

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Engineering, Environmental Environmental Sciences

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A high-performance piezoelectric photocatalyst was developed to improve the removal efficiency of tetracycline hydrochloride. The photocatalyst introduced a piezoelectric effect and constructed a heterojunction structure. The removal efficiency was further enhanced by ultrasound. The immobilized photocatalyst floated on the water surface, enabling easy recovery.
A high-performance piezoelectric photocatalyst (V-BiOIO3/FTCN) was constructed to improve removal efficiency of tetracycline hydrochloride (TCH). The role of V-BiOIO3 in the composite was to introduce piezoelectric effect and construct S-scheme heterojunction photocatalyst with fish scale tubular carbon nitride (FTCN). The morphology, structure, chemical composition and optoelectronic characteristics of the as-prepared photo -catalysts were studied by SEM, TEM, XRD, XPS and UV-Vis DRS. Combined with UV-Vis DRS, XPS valence band, Mott-schottky curve and theoretical calculations, the mechanism of TCH degradation was deeply analyzed. A series of degradation experiments showed that the V-BiOIO3/FTCN could effectively degrade TCH, and the removal efficiency was further improved under the action of ultrasound. Importantly, the further immobilized V-BiOIO3/FTCN/MS could float on the water surface to degrade TCH without additional stirring, which facilitated the recovery of photocatalysts and showed excellent practical application value. This work provided a reference for the design and immobilization of carbon nitride-based piezoelectric photocatalysts.

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