Applied Physics A

, 125:151 | Cite as

Au–Ag alloy nanoparticles supported on ordered mesoporous carbon (CMK-3) with remarkable solar thermal conversion efficiency

  • Guihua Zhu
  • Lingling WangEmail author
  • Yali Zhang
  • Wei YuEmail author
  • Huaqing Xie


Dual plasmonic Au–Ag alloy nanoparticles supported on ordered mesoporous carbon (Au–Ag/CMK-3) have been fabricated by the method of partial substitution of silver on CMK-3 with gold. Near-spherical Ag–Au nanoparticles with a diameter of 8–15 nm are uniformly coated on the surface of CMK-3. Attributed to dual localized surface plasmon resonance (LSPR) effect of Au–Ag alloy nanoparticles, the Au–Ag/CMK-3 composites have remarkable broadband absorption in the visible and near-infrared regions. All CMK-3 based nanofluids show much higher photothermal conversion efficiency than the base liquid of ethylene glycol (EG). Au–Ag alloy nanoparticles further enhance the photothermal conversion efficiency of CMK-3, which is 71.1% compared with 67.4% and 65.6% for Au/CMK-3 and Ag/CMK-3, respectively. The Au–Ag/CMK-3 nanomaterials pay new ways for fabrication promising photothermal nanofluids for application in direct absorption solar collectors.

List of symbols


Mass of nanofluids (g)


The ambient temperature (°C)


Constant rate of heat dissipation (s−1)


The incident solar heat flux (W m−2)


Wavelength (nm)


Spectral solar irradiance


Transmittance per unit wavelength


Penetration distance (cm)


Specific heat [J/(kg × ℃)]


The equilibrium temperatures (°C)


Temperature of the nanofluids at time t (°C)


Photothermal conversion efficiency


Area exposed to solar irradiation (m2)


Solar-weighted absorption coefficient


Transmittance coefficient


The spectral solar irradiance



This work was supported by National Natural Science Foundation of China (51876112, and 51590901), Shanghai Municipal Natural Science Foundation (Grant no. 17ZR1411000), the Key Subject of Shanghai Polytechnic University (Material Science and engineering, XXKZD1601 and EGD18YJ0042), the Graduate Program Foundation of Shanghai Polytechnic University (EGD17YJ0015), and Gaoyuan Discipline of Shanghai-Environmental Science and Engineering (Resource Recycling Science and Engineering).


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Environmental and Materials Engineering, College of EngineeringShanghai Polytechnic UniversityShanghaiChina
  2. 2.Research Center of Resource Recycling Science and EngineeringShanghai Polytechnic UniversityShanghaiChina

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