Facile development of carbon quantum dot deposited titanate-based materials for environmental application

• Published in: Materials chemistry and physics 2022-08, Vol.287, p.126319, Article 126319
• Main Authors: Nguyen-Le, Minh-Tri, Nguyen, Cuu Khoa, Nam, Pham Hong, Thoa, Dao Thi, Phong, Nguyen Van, Tri, Nguyen Huu, Viet, Nguyen Minh, Viet Ha, Tran Thi, Nguyen, Luu Huu
• Format: Article
• Language: English
• Subjects: Carbon quantum dot; EDTA; Methylene blue; Photocatalytic; Titanate
• ISSN: 0254-0584; 1879-3312
• DOI: 10.1016/j.matchemphys.2022.126319

In this study, we reported a facile EDTA-Na2 assisted method to synthesize CQD deposited titanate based materials for photocatalytic degradation of methylene blue (MB) dye. A variety of characterization methods (XRD, FTIR, DRS, Raman, UV–Vis, BET, etc.) were used to study the characteristics of the obtained materials. The results showed that the CQD deposited titanate based materials had stronger visible light absorption than the pristine titanate-based materials. Moreover, they also exhibited the enhanced photocatalytic activity in the degradation of MB into CO2. More than 90% of MB was quickly removed by one of these materials after 90-min reaction which obeyed the first-order kinetic model. .OH, .O2− and h+ were dominant active species for the MB photodegradation. •Novel carbon quantum dot deposited titanate-based materials were synthesized.•EDTA-Na2 was used as a modified in the synthesis method.•The synthesized materials were used as photocatalysts for removal of cationic dyes.•CQD deposited materials showed remarkable visible light absorption.•CQD deposited titanate based materials had an ability to mineralize MB to CO2.