Deep eutectic solvothermal synthesis of an open framework copper selenidogermanate with pH-resistant Cs+ ion exchange properties†
Abstract
Presented here is the deep eutectic solvothermal synthesis of an open framework copper selenidogermanate, namely [NH3CH3]0.75Cu1.25GeSe3 (CuGeSe-1), which exhibits a rapid and effective Cs+ ion exchange performance (qm = 225.3 mg gā1). CuGeSe-1 shows a structural flexibility upon Cs+ exchange. The robust selenide-based framework contributes to an excellent pH stability (1ā12). The Cs+-laden product could be facilely eluted.