Open AccessEnhanced solar energy absorption on nitrogen-doped carbon nanotubes decorated with gold-palladium bimetallic nanoparticles
Author(s) -
Lingling Wang,
Guihua Zhu,
Long Shen,
Wei Yu,
Dahai Zhu,
Yingchun Zhang,
Liye Zhang,
Huaqing Xie
Publication year - 2018
Publication title -
thermal science/thermal science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.339
H-Index - 43
eISSN - 2334-7163
pISSN - 0354-9836
DOI - 10.2298/tsci170620055w
Subject(s) - materials science , carbon nanotube , bimetallic strip , nanofluid , nucleation , nanoparticle , chemical engineering , absorption (acoustics) , palladium , alloy , nanotechnology , composite material , catalysis , metal , metallurgy , organic chemistry , chemistry , engineering
Gold-palladium alloy nanoparticles decorated on nitrogen-doped carbon nanotubes (Au-Pd/N-CNT) were prepared by using polyethylene imine reduction method. Polyethylene acts as not only a stabilizing agent, but also a reducing agent, leading to nucleation and growth of nanoparticles on the N-CNT surfaces. All the N-CNT-based nanofluids show broadband absorption across the visible region and near infrared region. The Au-Pd/N-CNT nanofluids absorb more solar irradiation compared with monometallic Pd/N-CNT or Au/N-CNT nanofluid. The photo-thermal conversion efficiency of Au-Pd /N-CNT nanofluids is 62.3%, compared with 53.3% and 57% for Pd/N-CNT and Au/N-CNT, respectively. This enhancement was mainly due to the synergetic effects of N-CNT and Au-Pd alloy nanoparticles.