期刊
ACS APPLIED NANO MATERIALS
卷 4, 期 5, 页码 5230-5239出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.1c00623
关键词
electrospinning; nanofiber; photothermal absorber; carbon nanotube; carbon nanoparticle; steam generation
资金
- National Science Foundation [CBET-1941743]
This study introduces a high-energy conversion efficiency photothermal absorber using polycaprolactone nanofiber composite with the incorporation of carbon nanotubes or carbon nanoparticles, achieving ultra-high solar absorptance. Electrospinning enables scalable fabrication of nanostructured materials, providing a new approach for low-cost and high-efficiency solar energy utilization in the future.
The usage of the abundant solar energy has attracted significant interest in the recent years, and the photothermal absorber with a high energy conversion efficiency due to its broad solar absorption has become a key component in many solar-harvesting applications, such as solar-driven steam generation. In this work, a polycaprolactone nanofiber composite with incorporation of carbon nanotubes or carbon nanoparticles is introduced with an average absorptance of 0.94 and 0.93 in the wavelength of visible and near-infrared light, serving as an excellent broadband solar absorber. The refractive indices of the composite are determined using a Lorentz-Drude oscillator model based on the experimental transmittance spectra. The composite yields an ultrahigh solar absorptance that contributes to an interfacial evaporation rate of 2.00 kg m(-2) h(-1) and 1.95 kg m(-2) h(-1) for carbon nanotubes and nanoparticle composites, respectively. Compared with other nanofabrication methods, electrospinning has the advantages of simplicity, cost effectiveness, and high efficiency, and it enables scalable fabrication of nanostructured materials. This work sheds light on a low-cost and high-output fabrication method for a nanofiber photothermal absorber composed of a biocompatible and biodegradable polymer and carbon materials.
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