基于光催化氧化还原反应的仿生纳米涂层防止生物污损。
Bioinspired nanocoatings for biofouling prevention by photocatalytic redox reactions.
机构信息
Department of Marine Science & Fisheries, College of Agricultural & Marine Sciences, Sultan Qaboos University, P.O. Box 34, Al Khoud, 123, Sultanate of Oman.
Chair in Nanotechnology, Water Research Center, Sultan Qaboos University, P.O. Box 17, Al Khoud, 123, Sultanate of Oman.
出版信息
Sci Rep. 2017 Jun 15;7(1):3624. doi: 10.1038/s41598-017-03636-6.
Aquaculture is a billion dollar industry and biofouling of aquaculture installations has heavy economic penalties. The natural antifouling (AF) defence mechanism of some seaweed that inhibits biofouling by production of reactive oxygen species (ROS) inspired us to mimic this process by fabricating ZnO photocatalytic nanocoating. AF activity of fishing nets modified with ZnO nanocoating was compared with uncoated nets (control) and nets painted with copper-based AF paint. One month experiment in tropical waters showed that nanocoatings reduce abundances of microfouling organisms by 3-fold compared to the control and had higher antifouling performance over AF paint. Metagenomic analysis of prokaryotic and eukaryotic fouling organisms using next generation sequencing platform proved that nanocoatings compared to AF paint were not selectively enriching communities with the resistant and pathogenic species. The proposed bio-inspired nanocoating is an important contribution towards environmentally friendly AF technologies for aquaculture.
水产养殖是一个价值数十亿美元的产业，水产养殖设施的生物污垢会带来沉重的经济处罚。一些海藻具有天然的防污（AF）防御机制，通过产生活性氧物质（ROS）来抑制生物污垢，这启发我们通过制造 ZnO 光催化纳米涂层来模拟这一过程。我们比较了用 ZnO 纳米涂层改性的渔网与未涂层的渔网（对照）和涂有铜基 AF 涂料的渔网的 AF 活性。在热带水域进行的为期一个月的实验表明，与对照相比，纳米涂层使微生物污垢生物的丰度减少了 3 倍，并且在防污性能上优于 AF 涂料。使用下一代测序平台对原核和真核污垢生物进行的宏基因组分析证明，与 AF 涂料相比，纳米涂层并没有选择性地富集具有抗性和致病性的物种。这种受生物启发的纳米涂层是朝着水产养殖环保型 AF 技术的重要贡献。
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