Vietnam Academy of Science and Technology

Project's information

Project's title	Fabrication of TiO2-sodium titanate-carbon quantum dots composites for photocatalytic reduction of CO2 into renewable fuels
Project’s code	GUST.STS ĐT2019-KHVL04
Research hosting institution	Graduate University of Science and Technology
Project leader’s name	Nguyen Le Minh Tri
Project duration	01/06/2019 - 30/06/2022
Project’s budget	462 million VND including project’s budget 300,000,000 VND and monthly scholarship: 162 million (4,500,000 VND/month)
Classify	Excellent
Goal and objectives of the project	To develop a method to fabricate TiO2-sodium titanate-carbon quantum dots composites for photocatalytic reduction of CO2 into renewable fuels
Main results	Theoretical results: - The project was successful to synthesize solutions of carbon quantum dots (CQD) at different time intervals of 4h, 6h and 8h having an ability to absorb visible light. - The project was successful to synthesize a TiO2-titanate composite by modifying titania precursor with EDTA at different ratios of [precursor]:[EDTA] via a sol-gel and heat treatment method. - The project was successful to synthesize TiO2-titanate-CQD composite by mixing the TiO2-titanate composite with different volumes of CQD. The obtained materials did not change their appearance. - The XRD, FTIR, SEM… results showed that the synthesized materials had their properties, composition and structures meet the given requirements. - The project was successful to set up a electrochemical system involving three electrodes: Pt auxiliary electrode, Ag/AgCl reference electrode and working electrode made of synthesized materials. - The project was successful to evaluate the photoactivity of the synthesized materials by using a linear sweep voltammetry and a time-current plot. - The project was successful to propose a photocatalytic checking system. Applied results: the obtained composites have a potential to be used as photocatalysts for environmental applications.
Novelty and actuality and scientific meaningfulness of the results	TiO₂-titanate-CQD composite by mixing the TiO2-titanate composites were synthesized for the first time via a sol-gel and heat treatment method. The obtained results will provide a fundemental knowledge for the synthesis of other titanium-based material systems. The product obtained from the project is a scientific and practical reference for other studies.
Products of the project	- Scientific papers in referred journals (list): + Optik 248, 168155 (2021) + Materials Chemistry and Physics 287, 126319 (2022) + Vietnam Journal of Chemistry XX, XX (2022) - Patents (list): None - Technological products (describe in details: technical characteristics, place): None - Other products (if applicable): one master student in chemistry was successfully trained and graduated.
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