Preparation and photothermal properties of composite materials of gradient index glass and disordered mesoporous carbon

Luminous energy utilization is a critical factor that directly affects the performance of photothermal conversion materials. However, in the process of photothermal conversion, there is always a thorny problem of low utilization of solar energy due to high reflectivity. In order to solve this problem, in this paper, the gradient refractive index structure has been introduced to reduce the reflection, increase the absorption, and capture more photons, so as to explore the high conversion efficiency, convenient preparation, and large-scale production of photothermal materials. A new type of photothermal composite material, namely gradient index glass and disordered mesoporous carbon, was prepared by screen printing and low-temperature sintering. Compared with the disordered mesoporous carbon glass film without refractive index, the temperature of the material was 9.375 degrees C higher under 808 nm laser irradiation for 900 s. This new photothermal material with good photothermal properties and stability will have great potential in the field of photothermal applications.