Ultrafast Laser-Driven Crystallization of LTA Zeolite

In conventional synthesis routes, crystallization is governed by bulk heating, diffusion, and reactor-scale heat/mass transfer. The primary challenge in these synthesis methods is not only achieving crystallization but controlling how the energy is delivered to the precursor medium, because the spatiotemporal distribution of energy largely determines nucleation and growth of crystals. Here, we provide an ultrafast laser synthesis method where a localized energy-delivery is achieved for driving LTA zeolite crystallization directly from liquid precursor suspension. This method enables precise control over nucleation and growth. Hence, the resulting LTA zeolite crystals synthesized via the ultrafast laser method demonstrate uniform particle size distribution, 28% greater total surface area, 57% greater external surface area, and 30% enhanced CO₂ adsorption (2.44 mmol g^{- 1}) compared to their hydrothermally synthesized counterpart, thanks to the dynamic environment of the synthesis method. Both XRD and FTIR characterizations show high crystallinity (90%) alongside the absence of detectable silanol or extra-framework aluminum species, validating that the ultrafast laser method maintains complete structural integrity in the LTA framework despite rapid crystallization. This work establishes the ultrafast laser method as a powerful approach for producing high-quality zeolite crystals with enhanced adsorption capacity, offering an alternative route to microporous materials in carbon dioxide capture and green chemical processes.