Template-free synthesis of faujasite type zeolite was investigated in the presence of graphene oxide (GO) in the synthesis sol. Nano-sized FAU/EMT, nano-sized FAU, and micro-sized FAU can be obtained depending on synthesis conditions such as precursor molar ratios, crystallization temperature, and the use of freeze-drying to alter water content. The obtained GO/Faujasite powder was shaped in the form of a disk by vacuum filtration. The shaped GO/Faujasite powder is electrically conductive (∼0.4 S/m and 2000-3000 Ω/sq), mechanically stable (Young's modulus: ∼7 MPa) and contains micropores, mesopores, and macropores. Furthermore, the GO/Faujasite disk exhibits high methylene blue adsorption capacity and can be regenerated by thermal annealing at 300 °C without significant capacity loss.
Bibliographical noteFunding Information:
This work was supported by the Center for Gas Separations Relevant to Clean Energy Technologies, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Basic Energy Sciences under DE-SC0001015 . Dae Woo Kim was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( 2015R1A6A3A04057367 ). He Han was supported by the China Scholarship Council (CSC) (File No. 201606060063 ). Parts of this work were carried out in the Characterization Facility, University of Minnesota, which receives partial support from NSF through the MRSEC program.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials