In this study, we developed a simple, low-temperature method to synthesize carbonized polymer nanosheets (CPNSs) using sodium alginate, a biopolymer derived from algae, and diammonium hydrogen phosphate. These nanosheets are produced through a solid-state pyrolysis at 180 °C, involving dehydration, cross-linking through phosphate ester bonds, and subsequent carbonization, forming 2D structured CPNSs. These synthesized CPNSs exhibit excellent bacterial adsorption capabilities, particularly against V. parahaemolyticus and S. aureus. When applied to ordinary filter paper, the CPNS-modified paper efficiently filters bacteria from aquaculture water, removing over 98% of V. parahaemolyticus within two hours and maintaining effectiveness after 24 h. In contrast, control filter paper showed significantly reduced efficiency over the same period. Our filtration tests demonstrated enhanced survival rates for shrimp in aquaculture systems, highlighting the potential of CPNSs-modified filter paper as a suitable treatment to reduce the microbiological contamination levels in recirculating aquaculture systems in the event of a disease outbreak.

在这项研究中，我们开发了一种简单的低温方法，使用海藻酸钠（一种源自藻类的生物聚合物）和磷酸氢二铵合成碳化聚合物纳米片（CPNS）。这些纳米片是通过 180°C 的固态热解产生的，包括脱水、通过磷酸酯键交联以及随后的碳化，形成 2D 结构的 CPNS。这些合成的 CPNS 表现出优异的细菌吸附能力，特别是针对副溶血性弧菌和金黄色葡萄球菌。当应用于普通滤纸时，CPNS改性滤纸可有效过滤养殖水中的细菌，在2小时内去除98%以上的副溶血性弧菌，并在24小时后保持有效性。相比之下，对照滤纸在同一时期表现出显着降低的效率。我们的过滤测试表明，水产养殖系统中虾的存活率有所提高，这突显了 CPNS 改性滤纸作为一种合适的处理方法的潜力，可在疾病爆发时降低循环水产养殖系统中的微生物污染水平。