Project's information

Project's title Photocatalytic degradation of persistent organic pollutants in agriculture using titanate perovskite fabricated at low temperature
Project’s code ĐLTE00.09/20-21
Research hosting institution Institute of Chemical Technology
Project leader’s name Nguyen Phung Anh
Project duration 01/01/2020 - 31/12/2022
Project’s budget 500 million VND
Classify Grade A
Goal and objectives of the project

Fabrication of the easy recyclable titanate perovskite-based catalysts with high activity and stability, in photodegrading persistent organic pollutants in wastewater from agricultural production, typically glyphosate herbicide and cinnamic acid.

Main results
The main results include the following:
+ 03 titanate perovskites with fully analyzed physicochemical properties and surveyed activity in the photodegradation of cinnamic acid.
+ 03 modified titanate perovskites with fully analyzed physicochemical properties and surveyed activity in the photodegradation of cinnamic acid.
+ Results of the oxidizing agent effect (ozone and H2O2) in the photodegradation of cinnamic acid on four best catalysts.
+ Results of stability, recovery, and recycling investigation on the four best catalysts in the cinnamic acid photodegradation under suitable conditions corresponding to each applicable operating parameter.
+ The results of oxidizing agent (air, ozone, and H2O2) effect examination in photodegradation of glyphosate on 04 outstanding catalysts.
Scientific meaning: The research has found a new recoverable perovskite-based catalytic system with low band gap energy and the ability to absorb visible light. Besides, the combination of TiO2 and mixed metal oxide as a potential photocatalyst has enhanced the visible light absorption ability, improved the specific surface area, and limited the electron-hole recombination.
Practical application: Research results based on suitable conditions for synthesized perovskite-based catalysts with high activity and easy recovery. The obtained photodegradation reaction conditions for typical persistent organic pollutants in agricultural production, including cinnamic acid and glyphosate, are the basis for orientation of the future application.
Novelty and actuality and scientific meaningfulness of the results

- Proposing a synthesis process of photocatalysts based on Al2TiO5, Fe2TiO5, and NiTiO3 perovskite by sol-gel method with low calcination temperature.
- Proposing a synthesis process of perovskite/TiO2 heterostructure catalyst systems: Al2TiO5/TiO2, Fe2TiO5/TiO2, and NiTiO3/TiO2 by hydrothermal method with larger specific surface area, higher activity and stability for cinnamic acid and glyphosate photodegradation, and easier recoverability compared to hydrothermal-synthesized TiO2 in an aqueous medium.

Products of the project
- Scientific papers in referred journals (list):
1) Nguyen Phung Anh, Nguyen Tri, Nguyen Dien Trung, Ha Cam Anh, Hoang Tien Cuong, Nguyen Thi Thuy Van, and Luu Cam Loc, Envirronmentally friendly fabrication of Fe2TiO5-TiO2 nanocomposite for enhanced photodegradation of cinnamic acid solution, Adv. Nat. Sci.: Nanosci. Nanotechnol. 12 (2022) 045015 (10pp) (VAST1, Q2)
2) Phung Anh Nguyen, Tri Nguyen, Cam Anh Ha, Tien Cuong Hoang, Thi Thuy Van Nguyen, Dien Trung Nguyen, and Cam Loc Luu, "Exceptional photodecomposition activity of heterostructure NiTiO3–TiO2 catalyst," Journal of Science: Advanced Materials and Devices, vol. 7, p. 100407, 2022 (SCIE, Q1)
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