一种可直接使用的磁性光热纳米流体

An Available Magnetic Photothermal Nanofluilds for Direct Application

本文通过"两步法"制备了一种具有高光热转换效率的Fe304-H20磁性纳米流体。该纳米流体可以通过磁分离技术实现纳米颗粒与基液的分离,使得纳米流体基液得以直接使用,同时具有优异的可重复利用性能。实验结果表明,在1200 s内其光热转化效率高达70.2%,并且经过60次的循环使用后无明显的衰减。此研究结果为实现纳米流体基液的直接应用提供了可行性的方案。

Fe3O4-H2O magnetic nanofluids with high photothermal conversion efficiency were prepared by the so-called two-step method,which can be easily separated by using an external magnetic field.The experimental results show that the maximum photo-thermal conversion efficiency of Fe3O4-H2O nanofluids can reach nearly 70.2%in 1200 s.And the magnetic photothermal nanofluilds can be reused at least 60 successive cycles without significant loss of photothermal conversion efficiency.This study paves a new avenue for direct use the base liquid of nanofluids in the solar thermal conversion technique.