Researchers have made a breakthrough in carbon dioxide (CO2) conversion, a critical process in mitigating global warming, by developing an innovative biochar catalyst. This biochar, derived from corn stalks, is doped with nitrogen (N) and boron (B) using either a one-step or two-step pyrolysisPyrolysis is a thermochemical process that converts waste biomass into bio-char, bio-oil, and pyro-gas. It offers significant advantages in waste valorization, turning low-value materials into economically valuable resources. Its versatility allows for tailored products based on operational conditions, presenting itself as a cost-effective and efficient More process. The study, published in Separation and Purification Technology, demonstrates that one-step doping results in a significantly more efficient catalyst compared to the two-step method.

The N, B co-doped biochar (NB-BC) exhibits remarkable photothermal conversion efficiency and catalytic performance. Under mild conditions, such as light irradiation from a xenon lamp and standard CO2 pressure, the NB-BC catalyst achieved a high yield of 99% in CO2 cycloaddition reactions, producing valuable cyclic carbonates. This high efficiency is attributed to the optimized pore structure, enhanced electronic properties, and increased density of active sites due to the N and B doping.

Furthermore, the NB-BC catalyst maintains its performance over multiple cycles and under simulated industrial flue gas conditions, showcasing its durability and potential for real-world applications. The research highlights the synergistic effects of N and B co-doping in improving biochar’s catalytic properties, paving the way for more sustainable and efficient CO2 conversion technologies. This advancement not only addresses the pressing issue of CO2 emissions but also contributes to the development of high-value chemical production from waste biomassBiomass is a complex biological organic or non-organic solid product derived from living or recently living organism and available naturally. Various types of wastes such as animal manure, waste paper, sludge and many industrial wastes are also treated as biomass because like natural biomass these More, offering a dual benefit in combating climate change and resource utilization.