Construction of superhydrophobic directly Z-scheme bismuth oxybromide/silver phosphate fabric surface with UV shielding
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nstruction of superhydrophobic directly Z-scheme bismuth oxybromide/silver phosphate fabric surface with UV shielding and enhanced visible light absorption activity 1*
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GE Bo , ZHANG YuLing , ZHANG TingXiao , REN GuiNa , LI WenZhi & ZHAO Hui 1
School of Materials Science and Engineering, Liaocheng University, Liaocheng 252000, China; 2
School of Environmental and Material Engineering, Yantai University, Yantai 264405, China Received April 16, 2020; accepted August 3, 2020; published online September 24, 2020
Various forms of pollutants discharged from industrial and life; how to treat the opposite water-soluble pollutants at the same time is a challenge. Here, a superhydrophobic BiOBr/Ag3PO4 fabric (SH fabric) bulk material was prepared aiming at the diversity of pollutants. Water (WCA=160°) and oil contaminants (spread) have different wetting behavior on fabric surfaces. The high recovery efficiency for oil pollutants was achieved by using the selective oil removal property of the SH fabric. Meanwhile, the pollutants in the aqueous phase were removed by photocatalyst after oil/water separation. Mechanism analysis demonstrated that the direct Z-type heterojunction formed between BiOBr (EVB=1.66 eV; ECB=−1.08 eV) and Ag3PO4 (EVB=3.03 eV; ECB= 0.6 eV). It is worth noting that the SH fabric exhibited good mechanical stability and UV shielding performance, which have potential application in environmental control. superhydrophobic, UV shielding, oil-water separation, pollutant removal Citation:
Ge B, Zhang Y L, Zhang T X, et al. Construction of superhydrophobic directly Z-scheme bismuth oxybromide/silver phosphate fabric surface with UV shielding and enhanced visible light absorption activity. Sci China Tech Sci, 2020, 63, https://doi.org/10.1007/s11431-020-1703-7
1 Introduction In order to deal with the growing serious pollution situation, researchers have developed a variety of materials and methods [1–6] with special wettability. Among them, superhydrophobic surfaces have attracted extensive interest [7– 10]. Until now, the application of superhydrophobic materials has gone beyond the scope of self-cleaning. For example, it can be used for surfae enhanced raman scattering [11], wear resistant [12], microfluidic process [13], selfcleaning [14], oil/water mixture separation [15,16] and UV shielding [17–19]. Environment-friendly polydopamine and stearic acid modified cotton fabric were employed to achieve self-cleaning, UV shielding and oil/water separation prop*Corresponding authors (email: [email protected]; [email protected])
erties by Lai et al. [17]. In addition, the transparent super-slip surface based on hydrophobic property is applied [20]. The above materials were highly efficient in the treatment of oil contaminants that were floating or more dense than water. However, the removal of dissolved contaminants from the water remained a challenge after the oil layer was removed. To address the issue of water-soluble dye emissions from leather mills, Xu et al. [21] proposed a gelatine-copolymer
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