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Materials 2018, 11(3), 447; https://doi.org/10.3390/ma11030447

Bismuth Oxysulfide and Its Polymer Nanocomposites for Efficient Purification

State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
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Received: 6 February 2018 / Revised: 9 March 2018 / Accepted: 12 March 2018 / Published: 19 March 2018
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Abstract

The danger of toxic organic pollutants in both aquatic and air environments calls for high-efficiency purification material. Herein, layered bismuth copper oxychalcogenides, BiCuSO, nanosheets of high photocatalytic activity were introduced to the PVDF (Polyvinylidene Fluoride). The fibrous membranes provide an easy, efficient, and recyclable way to purify organic pollutant. The physical and photophysical properties of the BiCuSO and its polymer composite were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), ultraviolet-visible diffuse reflection spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), electron spin resonance (EPR). Photocatalysis of Congo Red reveals that the BiCuSO/PVDF shows a superior photocatalytic activity of a 55% degradation rate in 70 min at visible light. The high photocatalytic activity is attributed to the exposed active {101} facets and the triple vacant associates V B i V O V B i . By engineering the intrinsic defects on the surface of bismuth oxysulfide, high solar-driven photocatalytic activity can be approached. The successful fabrication of the bismuth oxysulfide and its polymer nanocomposites provides an easy and general approach for high-performance purification materials for various applications. View Full-Text
Keywords: bismuth oxyselenide; high-efficiency purification; defects bismuth oxyselenide; high-efficiency purification; defects
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Luo, Y.; Qiao, L.; Wang, H.; Lan, S.; Shen, Y.; Lin, Y.; Nan, C. Bismuth Oxysulfide and Its Polymer Nanocomposites for Efficient Purification. Materials 2018, 11, 447.

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