Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, Shandong, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, Shandong, China.
J Colloid Interface Sci. 2019 Jan 1;533:358-368. doi: 10.1016/j.jcis.2018.06.090. Epub 2018 Aug 29.
The problem of marine life attachment and its pollution to facilities has caused a lot of great troubles in the development and application of marine resources. The holes generated by the photocatalytic coating materials under sunlight may produce strong oxidizing species and showed a significant effect on the degradation and bactericidal performance of environmental organic matter. In this paper, a novel bismuth vanadate/indium vanadate (BiVO/InVO) composite with cherimoya-like microstructure was fabricated using new vanadium source. It is found that the composite materials showed enhanced photocatalytic antifouling property. The degradation efficiency of the model pollutes (Rhodamine B, RhB) achieved 99.775% within 280 min over BiVO/InVO nanostructures, and the sterilization rate of E. coli, S. aureus, P. aeruginosa and A. carterae achieved 99.7148%, 99.5519%, 99.5411% and 96.00%, respectively. Moreover, the circulate photocatalytic degradation of antibacteria experiments demonstrated the outstanding stability and reusability of BiVO/InVO composite. According to the active free radical trapping experiments, the hydroxyl radical (OH) and superoxide radical (O) were certified to be the main reactive oxygen species in the BiVO/InVO system. The distinctly enhanced photocatalytic performance of BiVO/InVO nanomaterial primarily resulted from the narrow bandgap (about 1.86 eV). This study not only provides a new method for developing novel antibacterial materials, but also introduces a visible light-driven photocatalyst for water treatment and marine antifouling, especially for red tide control.
海洋生物附着及其对设施的污染问题，给海洋资源的开发和应用带来了很多大麻烦。在阳光照射下，光催化涂层材料产生的孔可能会产生强氧化性物质，并对环境有机物质的降解和杀菌性能表现出显著的效果。本文采用新型钒源，制备了具有番荔枝状微观结构的新型五氧化二铋/五氧化二铟（BiVO/InVO）复合材料。研究发现，复合材料表现出增强的光催化防污性能。在 280 min 内，BiVO/InVO 纳米结构对模型污染物（罗丹明 B，RhB）的降解效率达到 99.775%，大肠杆菌、金黄色葡萄球菌、铜绿假单胞菌和粘质沙雷氏菌的杀菌率分别达到 99.7148%、99.5519%、99.5411%和 96.00%。此外，循环光催化降解抗菌实验证明了 BiVO/InVO 复合材料具有出色的稳定性和可重复使用性。根据活性自由基捕获实验，证明了羟基自由基（OH）和超氧自由基（O）是 BiVO/InVO 体系中的主要活性氧物质。BiVO/InVO 纳米材料的明显增强的光催化性能主要归因于其较窄的带隙（约 1.86 eV）。这项研究不仅为开发新型抗菌材料提供了新方法，而且为水处理和海洋防污，特别是赤潮控制，引入了一种可见光驱动的光催化剂。
