Abstract
In this work, a visible-light-driven BiOCl/Bi2WO6 photocatalyst was obtained via a facile hydrothermal method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), X-ray photoelectron spectroscopy (XPS), ultraviolet/visible light diffuse reflection spectroscopy (UV/Vis), and photocurrent (PC). BiOCl/Bi2WO6 was modified with (3-chloro-2-hydroxypropyl) trimethyl ammonium chloride to obtain the cationized BiOCl/Bi2WO6. Cotton fabric was pretreated with sodium hydroxide (NaOH) and sodium chloroacetate solution to obtain carboxymethylated cotton fabric, which was further reacted with cationized BiOCl/Bi2WO6 to achieve finished cotton fabric. The cotton fabrics were characterized by Fourier-transform infrared spectroscopy (FT-IR), XRD, SEM, and EDS. The photocatalytic activity of the BiOCl/Bi2WO6 photocatalyst and cotton fabrics was assessed by photocatalytic degradation of MB (methylene blue) solution under simulated visible light. The self-cleaning property of cotton fabrics was evaluated by removing MB solution and red-wine stains. Results revealed that the coated cotton fabrics exhibited appreciable photocatalytic and self-cleaning performance. In addition, anti-UV studies showed that the finished cotton fabrics had remarkable UV blocking properties in the UVA and UVB regions. Therefore, the finished cotton fabric with BiOCl/Bi2WO6 can provide a framework for the development of multifunctional textiles.
Highlights
Semiconductor-based photocatalysis is regarded as a promising and cost-effective approach to realize environmental decontamination [1,2,3,4,5]
Visible light-responsive Bi2 WO6 /BiOCl heterojunctions were successfully prepared via a simple one-step hydrothermal method by Liang and his coworkers, and the results revealed that Bi2 WO6 /BiOCl had superior degradation efficiency under visible-light illumination than bare BiOCl and Bi2 WO6 [18]
No diffraction peaks of BiOCl were detected in Cl/W-1-3 from Figure 2a, which may be due to the insufficient content of BiOCl/Bi2 WO6
Summary
Semiconductor-based photocatalysis is regarded as a promising and cost-effective approach to realize environmental decontamination [1,2,3,4,5]. BiOCl with a layered structure is a potential candidate for semiconductor photocatalysis owing to its superior photocatalytic activity. It displays a relatively low quantum efficiency in the visible wavelength range that hinders its practical implementation [8,9,10,11]. Cotton fabrics have been finished with semiconductor materials by many researchers to obtain properties such as self-cleaning, UV-shielding, superhydrophobic, water–oil separating, and antibacterial [23,24,25]. BiOCl nanosheet-coated cotton fabric was obtained via a pad–dry–cure method by Jin and his colleagues; the finished cotton fabric showed appreciable UV protection and photocatalytic performance [27]. The UV protection, photocatalytic, and self-cleaning properties of the cotton fabric coated with BiOCl/Bi2 WO6 were investigated
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