Graphene Oxide–Coated Biochar: Dual Enhancement of Carbon Capture Capacity and Mechanical Properties of Cementitious Materials

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:Researchers in CCUS and sustainable construction materials can leverage the mechanism insights and synthesis method to further optimize carbon-capturing cement composites.

🏢実務担当者:Cement manufacturers and construction firms can explore this material as a way to reduce embodied carbon of concrete while maintaining performance.

🏛政策担当者:Policymakers focusing on industrial decarbonization and CCUS roadmaps should note this material innovation as a promising technology for the cement sector.

Abstract Biochar possesses an extensive porous structure and a huge specific surface area that substantially augments the carbon capture capacity of cementitious materials. Nevertheless, excess biochar leads to reduced mechanical properties of cementitious materials due to its inherent porosity. The modification of biochar with graphene oxide (GO) can counteract its negative influences on the mechanical strength of cementitious materials, without compromising its carbon capture properties. This research assesses the synergistic improvement of GO-coated biochar (GC) on the mechanical properties and carbon capture capacity of cementitious materials, and the relevant enhancement mechanism is systematically proposed. Specifically, the GC is prepared by bonding GO to the straw-derived biochar surface via amino functionalization. The GC displays an increase of 346.09% in specific surface area. Further, the GC significantly improves the carbon capture and capacity mechanical properties of cementitious materials. To be specific, after 28 days of carbonation curing, the compressive strength of the GCC3 group increases by 26.35% in comparison with the PC group and by 38.61% in comparison with the BC3 group. More importantly, based on the microstructure and phase composition analysis of cement paste containing GC, the enhancement mechanism of GC on the carbon capture capacity and mechanical properties of cement-based materials could be reasonably ascribed to the fact that GC provides a larger specific surface area, facilitates the generation of calcium carbonate and cement hydration products, and optimizing the microstructure of the cement matrices. This study introduces a novel GC for cementitious materials, presenting a promising avenue for the advancement of the carbon capture, utilization, and storage technique of cementitious materials.

• openalex https://doi.org/10.1061/jmcee7.mteng-22580first seen 2026-07-22 05:05:39