Nanotechnology Research Center, Sultan Qaboos University, PO Box 33, Al-Khoudh, 123, Muscat, Oman.
Department of Physics, College of Science, Sultan Qaboos University, PO Box 36, Al-Khoudh, 123, Muscat, Oman.
Chemosphere. 2024 Feb;350:141053. doi: 10.1016/j.chemosphere.2023.141053. Epub 2023 Dec 26.
This work reports the development of multifunctional or polymorphous surfaces using zinc oxide (ZnO) nanorods, silica (SiO), and fluoropolymer functionalization in a sequential process. Firstly, zinc oxide nanorods were grown on activated carbon cloth (ACC) using a simple low-temperature synthesis process. ZnO nanorods-coated ACC substrate was applied to investigate the antimicrobial properties, and the results showed inhibition of 50% for Escherichia coli (E.coli) and 55% for Bacillus subtilis (B.subtilis) over 48 h of incubation time. Subsequent in-situ modification of silica nanoparticles like layer on ZnO nanorods-coated ACC surface was developed and used as an electrode for brackish water desalination in a capacitive deionization system. ZnO-SiO modified ACC surface enhanced the desalination efficiency by 1.6 times, the salt removal rate (SRR) by threefold, and the durability (fouling prevention) for long-term usage compared to pristine ACC. Further modification of the ZnO-SiO-ACC surface using fluoropolymer rendered the surface superhydrophobic and oleophilic. Vegetable (1.4 g/g) and crude oil (1.6 g/g) adsorption capacities were achieved for modified surface which was 70% enhancement compared with pristine ACC. The dynamic oil spill adsorption test exhibited the complete removal of oil spills on water surfaces within a few seconds, suggesting a potential application in oil spill cleaning.
这项工作报道了使用氧化锌 (ZnO) 纳米棒、二氧化硅 (SiO) 和氟聚合物功能化在顺序过程中开发多功能或多晶型表面。首先，使用简单的低温合成工艺在活性炭布 (ACC) 上生长氧化锌纳米棒。将 ZnO 纳米棒涂覆的 ACC 基底应用于研究抗菌性能，结果表明在孵育 48 小时后，对大肠杆菌 (E.coli) 的抑制率为 50%，对枯草芽孢杆菌 (B.subtilis) 的抑制率为 55%。随后在 ZnO 纳米棒涂覆的 ACC 表面上原位修饰了类似层的二氧化硅纳米颗粒，并将其用作电容去离子系统中咸水淡化的电极。与原始 ACC 相比，ZnO-SiO 修饰的 ACC 表面将脱盐效率提高了 1.6 倍，盐去除率 (SRR) 提高了两倍，并且在长期使用中具有更好的耐用性（防污）。进一步用氟聚合物修饰 ZnO-SiO-ACC 表面，使表面超疏水和超亲油。改性表面的植物（1.4 g/g）和原油（1.6 g/g）吸附能力比原始 ACC 提高了 70%。动态溢油吸附测试表明，在几秒钟内即可完全清除水面上的溢油，这表明在溢油清理方面具有潜在应用。
