Solar triggered CO2 regeneration and conversion using amine-based materials

Leveraging solar irradiation for regenerating amine materials presents a promising alternative to conventional steam-based CO₂ regeneration, potentially mitigating environmental concerns associated with rising CO₂ levels. However, this method has limitations and needs substantial improvements in both regeneration efficiency and photo-thermal conversion efficiency, which are closely tied to the performance of the photo-thermal materials. The development of highly efficient photo-thermal conversion materials is crucial for the successful implementation of this technology. In this review, we focus on the utilization of light-irradiated amine materials for CO₂ regeneration and conversion. We compare and analyze their performance in terms of regeneration efficiency, temperature achieved, properties of the photo-thermal conversion materials and advantages and disadvantages of various photo-thermal materials. Additionally, we provide suggestions for enhancing these materials based on the research findings and discuss the potential future directions. Moreover, we address the challenges and feasibility of replacing traditional steam-based methods with light-activated CO₂ regeneration in industrial applications, aiming to foster more efforts towards the industrial-scale utilization of solar-irradiated CO₂ regeneration and conversion.