# Radiation Characterization of Smart Aerogels Based on Hollow VO2 Particles

## TL;DR

This paper introduces a smart aerogel made of hollow VO2 particles that can adjust its emittance with temperature, improving energy efficiency and reducing emissions.

## Contribution

The design of a smart aerogel using hollow VO2 particles with optimized thermal regulation properties is presented.

## Key findings

- Hollow VO2 particles with 1 μm radius and 40 nm shell thickness show excellent thermal regulation.
- A 50 μm thick aerogel with 2.5% volume fraction achieves 51.295% emittance.
- The study provides a theoretical basis for improving infrared smart aerogel energy-saving performance.

## Abstract

The smart aerogel control technology based on thermochromic materials can dynamically adjust the emittance with temperature changes, which plays a significant role in reducing energy consumption and carbon emissions. This paper presents the design of the smart aerogel based on hollow VO2 particles with excellent emittance modulation. The radiation characteristics of a single particle were calculated using the multi-sphere superposition T-matrix method, and the radiation characteristics of the aerogel were determined using the Monte Carlo method. The results indicate that when the radius of the hollow VO2 particles is 1 μm and the shell thickness is 40 nm, the hollow particles display excellent thermal regulation. When the thickness of the VO2 particle smart aerogel is 50 μm, with a volume fraction of 2.5%, the emittance of the adaptable aerogel can reach 51.295%, which provides a theoretical foundation for the further advancement of infrared smart aerogels to enhance their energy-saving performance.