Construction of Z-scheme LaNiO3/SnS2 composite for boosting visible light photodegradation of tetracycline

Add time:08/29/2019    Source:sciencedirect.com

Exploring efficient and stable visible-light-driven photocatalysts for the photocatalytic elimination of organic pollutants is of prime importance for environmental remediation. For this purpose, zero-dimensional (0D) LaNiO3 nanoparticles was opted for coupling with two-dimensional (2D) SnS2 nanosheets to build a 0D/2D Z-scheme LaNiO3/SnS2 composite. The resultant LaNiO3/SnS2 composite displayed greatly enganced photocatalytic degradation of tetracycline (TC) under visible light irradiation. Strikingly, the optimum degradation rate of the modified LaNiO3(4.0 wt%)/SnS2 hybrid was up to 0.0054 min−1, which was nearly 7.7-fold larger than that of pure SnS2 (0.0007 min−1). The excellent performance could be ascribed to the formative 0D/2D Z-scheme LaNiO3/SnS2 system between LaNiO3 and SnS2, which not just accelerated the spatial isolation of photogenerated charge carriers but also vested the LaNiO3/SnS2 hybrid with high redox capacity. The investigation creates a new opportunity for other SnS2-based Z-scheme hybrids for environment purification.

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