131. high-temperature solar absorbing nanostructures

Department: Mechanical & Aerospace Engineering
Faculty Advisor(s): Renkun Chen

Primary Student
Name: Elizabeth Branman Caldwell
Email: ebcaldwe@ucsd.edu
Phone: 310-422-8711
Grad Year: 2019

Solar receivers are the core part of solar thermal technologies, determining the efficiency of conversion of solar radiation to heat. As solar thermal technologies strive to function at higher temperatures, solar absorbing coatings need to meet these temperature targets while maintaining superior optical performance. In this recent study, cobalt oxide (Co3O4) was synthesized into two distinctive nanostructures (nanoflowers and nanoneedles) through an inexpensive and scalable hydrothermal process. When coated with a thin layer of silicon dioxide (SiO2) through atomic layer deposition, nanoflowers and nanoneedles demonstrated excellent thermal stability at 800C in air and maintained a record-high over 99% solar absorptance.

Industry Application Area(s)
Energy/Clean technology | Materials

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