writer：Min Wang, Lingling Wang, Wei Yu*, Huaqing Xie
keywords：Au nanoparticles, Bi2WO6 nanosheets, broad?band absorption, solar thermal conversion
source：期刊
specific source：Journal of Materials Science: Materials in Electronics volume 30, pages 9388–9395(2019)
Issue time：2019年
Photothermal conversion is one of the most effective ways of absorbing and utilizing solar energy. The key issues of photothermal conversion are seeking for nanofluids with strong and wide-range sunlight harvesting. In this work, near-infrared (NIR) light absorbed Bi2WO6 is first exploited for solar thermal conversion. However, the photothermal conversion efficiency is low owing to its insufficient NIR-light absorption. After coating Au nanoparticles on Bi2WO6 nanosheets, the localized surface plasmon resonance effect of Au nanoparticles enable Bi2WO6 show strong optical absorption. Au/Bi2WO6–H2O nanofluids have higher temperature rise and better photothermal conversion efficiency than Bi2WO6 and the base fluid water. The present work not only explore a new way for improving the photothermal conversion efficiency of NIR-light nanofluids, but also help design and prepare novel broad-band sunlight absorption nanofluids.