Advanced Technology Development Centre, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India.
Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India.
Environ Sci Pollut Res Int. 2017 Aug;24(22):18063-18072. doi: 10.1007/s11356-017-9458-7. Epub 2017 Jun 17.
Development of efficient techniques to combat the harmful effects of oil spill is an emerging field, where fabrication of new sorbents for selective removal of oil has become a hot topic for environmental scientists. The present study reports the preparation of superhydrophobic/oleophilic magnetic titania nanotubes via a facile hydrothermal method, followed by the treatment with octadecylamine, as potential magnetically driven sorbent for selective removal of oil from water surface. The magnetic nature (superparamagnetism at 300 K) of the nanotubes enabled magnetic removal of the oil-sorbed material from water surface. Wettability test of the material depicted a static water contact angle of 166 ± 1°, indicating its superhydrophobic character. Oil uptake experiments and contact angle measurements revealed its superoleophilicity with maximum oil sorption capacity >1.5 g/g for a variety of oils. In addition to the ease of magnetic removal, the nanotubes possess sufficient buoyancy, high selectivity, and quick rate of oil uptake and is more than five times reusable.
开发高效的技术来应对溢油的有害影响是一个新兴领域，其中用于选择性去除油的新型吸附剂的制备已成为环境科学家的热门话题。本研究报告了通过简便的水热法制备超疏水/亲油磁性二氧化钛纳米管，然后用十八胺进行处理，作为从水面选择性去除油的潜在磁性驱动吸附剂。纳米管的磁性（在 300 K 时呈现超顺磁性）使得可以从水面上磁性去除吸附油的材料。材料的润湿性测试显示其静态水接触角为 166 ± 1°，表明其具有超疏水性。吸油实验和接触角测量表明，其具有超亲油性，对各种油的最大吸油能力> 1.5 g/g。除了易于磁性去除之外，纳米管还具有足够的浮力、高选择性、快速的吸油速度，并且可重复使用超过五倍。
