Details

Autor(en) / Beteiligte

• Carey, Michael S
• Barsoum, Michel W

Titel

Scalable and sustainable production of Ti3C2Tz MXene and fluorine recovery from wastewater through cryolite precipitation

Ist Teil von

• RSC advances, 2022-10, Vol.12 (47), p.30846-30850

Ort / Verlag

Cambridge: Royal Society of Chemistry

Erscheinungsjahr

2022

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Treatment of HF or HCl/LiF etched Ti3C2Tz with 0.05 M NaHCO3 before water washing reduces the wastewater generated by 75%. When etched with HF, cryolite (Na3AlF6) precipitation from spent etching waste effectively removes fluorine from this waste stream, offers insight into the etching chemistry of MAX to MXene, and provides an effective analytical tool for optimization of MXene production. Additionally, washing HF etched multilayered Ti3C2Tz with 0.05 M NaHCO3 allows for the production of delaminated Ti3C2Tz colloidal suspensions, which typically requires the use of TBAOH or DMSO for intercalation and subsequent delamination. Ti3C2Tz made with HCl/LiF and washed with 0.05 M NaHCO3 yields a colloidal suspension with a concentration of 18 mg mL−1 and a film conductivity of 1150 S cm−1.