Antifouling properties of PEVE coating modified by BiVO 4 /BiOIO 3 composite photocatalyst
- PDF / 2,579,339 Bytes
- 8 Pages / 595.276 x 790.866 pts Page_size
- 28 Downloads / 179 Views
Antifouling properties of PEVE coating modified by BiVO4/BiOIO3 composite photocatalyst Yupeng Song1 · Feng Zhou1 Received: 16 April 2020 / Accepted: 10 June 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The BiVO4/BiOIO3 composite photocatalyst was synthesized by hydrothermal method. The fluorocarbon resin was modified by the addition of a composite photocatalyst. The results showed that under simulated sunlight, the composite coating with the best performance had a sterilization rate of 90.5%. The EIS and photocurrent measurements indicated that due to the heterostructure that formed and the electric field that formed inside, the recombination rate of photogenerated electron–holes were reduced; Trapping experiments indicated that .OH radicals were the main reactive species for the sterilization process. Additionally, the cycle tests revealed the excellent stability of BiVO4/BiOIO3 composites. Keywords Antifouling coating · BiOIO3 · BiVO4 · Heterostructure
1 Introduction Ships require the injection and discharge of ballast water while under motion, and a large amount of ballast water is generated each year [1]. However, there are many marine microorganisms in the ballast water that attach to the hull to cause corrosion, and this biocorrosion also increases the hull’s running resistance and fuel consumption [2, 3]. Marine biofouling is also the primary vehicle for introducing invasive species (or nonnative species) and can promote potential side effects on the local biota [4]. Photocatalytic technology produces hydroxyl radicals that can be used to inactivate marine microorganisms [5, 6]. Our group’s work on photocatalysts to inactivate marine microorganisms includes TiO2 [7], ZnWO4 [8], Bi2WO6 [9], and WO3 [10]. However, although heterogeneous photocatalysts have great prospects for inactivating microorganisms, they have two problems; low energy conversion rate and high recombination rate of electrons and holes [11, 12]. To solve these Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00339-020-03717-w) contains supplementary material, which is available to authorized users. * Feng Zhou [email protected] 1
Key Laboratory of Ship‑Machinery Maintenance and Manufacture for Ministry of Transport, Dalian Maritime University, Dalian 116026, People’s Republic of China
problems, more effective methods have been proposed, such as deposition, doping, surface sensitization, and heterostructure construction [13–16]. In the development of many new photocatalysts, Bi3+-based oxides such as BiOX (Cl, Br, I), Bi2MoO6, and B iOIO3, has a special layered structure, suitable potential position, internal polar electric field, and excellent photocatalytic performance that have attracted attention [17]. BiOIO3 has an Aurivillius type ( Bi2O2)2+ layer and an (IO3)− pyramid structure that accelerates electron transport [18]. Each ( IO3)− triangle can be thought of as an ordered electric dipole, with (IO3)− arranged in larger nanoscale
Data Loading...
