Visible-light-driven photocatalytic degradation of rhodamine B using Bi 2 WO 6 /GO deposited on polyethylene terephthala
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(2020) 2:16
Journal of Leather Science and Engineering
RESEARCH
Open Access
Visible-light-driven photocatalytic degradation of rhodamine B using Bi2WO6/ GO deposited on polyethylene terephthalate fabric Zoufei Du1, Ce Cui2, Sihang Zhang1, Hongyan Xiao2, Erhui Ren2, Ronghui Guo2* and Shouxiang Jiang3*
Abstract The environmental repercussions of wastewater from the dye process mean that it is very important to obtain an eco-friendly photocatalyst that would degrade wastewater. Herein, bismuth tungstate/graphene oxide (Bi2WO6/GO) composites are fabricated through in-situ hydrothermal reaction and then the Bi2WO6/GO photocatalysts are deposited onto polyethylene terephthalate (PET) fabric. The obtained Bi2WO6/GO deposited PET fabrics are then characterized through XPS, Raman, SEM, TEM, XRD, UV-vis, BET method and photoluminescence spectroscopy (PL) to investigate their chemical and crystal structures, morphology, optical property, surface area and photochemical properties. Photocatalytic performance is studied through examining the rate of degrading rhodamine B (RhB) under visible light. Surface of PET fibers is densely covered with Bi2WO6/GO. Bi2WO6/GO deposited PET fabrics show a broad absorption band in the visible spectra. Removal rate of RhB on the Bi2WO6/GO deposited PET fabric is the highest with the GO content of 2 g/L (labeled as Bi2WO6/2 g/LGO). The result of active species experiment shows that superoxide radicals (·O2−) plays a major role in the degradation of RhB. Moreover, Bi2WO6/2 g/LGO deposited PET fabric shows excellent cycle stability of photocatalytic degradation for RhB. The findings in this work can be extended to preparation other types of composite on the textile for photocatalysis, which can be applied to remove dyes in the wastewater produced by the textile or leather industry. Keywords: Bi2WO6/GO depositing, RhB, PET fabric, Photocatalytic performance, Visible light-driven
1 Introduction It is well known that industries can contribute to the contamination of water bodies, such as textile and leather industries because a large volume of water is used in the process, generating large amounts of effluents. The dye wastewater from these industries is resistant to biodegradation [1]. Therefore, industrial dye wastewater treatment has received much attention. Among numerous pollutant treatment approaches, photocatalysis is * Correspondence: [email protected]; [email protected] 2 College of Biomass Science and Engineering, Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu, China 3 Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China Full list of author information is available at the end of the article
one of the most promising methods for wastewater treatment [2–4]. In recent years, Bi-based photocatalysts have attracted much attention [5–7]. Bi2WO6 is reported as an effective photocatalyst for detoxification in wastewater as well as polluted air among Bi-based semiconductors. Additionally, Bi2WO6 is stable with hi
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