투고논문

Abstract ²⁹Si and ²⁷Al solid-state nuclear magnetic resonance (NMR) spectroscopy has been established as a powerful technique for investigating the network connectivity and coordination environments for diverse crystalline and amorphous silicate materials. Recently, zeolite-geopolymer composites, emerging as sustainable and functional construction materials, have garnered significant interest for their mechanical properties and adsorption capabilities. However, the coexistence of crystalline and amorphous phases, as well as complex Si-Al coordination environments, makes detailed structural characterization challenging. In this mini-review, recent applications of ²⁹Si and ²⁷Al solid-state NMR to zeolite-geopolymer compo-sites are summarized, highlighting the isotopic chemical shift ranges of geopolymer gels in comparison with coexisting crystalline phases. Perspectives on future studies are also discussed.

Keywords Solid-state NMR, zeolite-geopolymer composites, ²⁷Al NMR, ²⁹Si NMR

* Address correspondence to: Hyo-Im Kim, Department of Geology and Research Institute of Molecular Alchemy, Gyeongsang National University, Jinju 52828, Republic of Korea, Tel: 82-55-772-1478; E-mail: hyoim@gnu.ac.kr