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1. Full name: Dang Thi Ngoc Thuy 2. Gender: Female
3. Date of birth: November 3st, 1977 4. Place of birth: Ha Nội
5. Number of admission decision: Decision 5023/QĐ-SĐH dated on 29th December 2017 by the President of Vietnam National University, Hanoi.
6. The changes in academic process: Change extension of the protection period for PhD students as the decision No.231/QD-SDH signed on 27 January 2022 by the Rector of VNU University of Science.
7. Title of thesis: Research on synthetic process of modified TiO2 nano-material coasted on rice husk ash and application for nitrogen compound removal from Hanoi’Underground water
8. Major: Environment science 9. Code: 9440301.01
10. Supervisors: 1. Assoc. Prof., Dr. Nguyen Thi Ha
2. Dr. Nguyen Hoang Nam
11. Summary of the new findings of thesis:
+ Have fabricated, analyzed, evaluated the characteristics and optical catalytic effectiveness of TiO2 nanomaterials modified N, Nd, Eu and obtained materials that meet the target of denaturation materials that bring the energy of the forbidden zone to the natural light zone (Eg from 2.61 ÷ 3.11 Ev); the effectiveness of decomposition of some nitrogen-containing compounds (ammonium, antibiotics, color) in natural light conditions reached 80-90%, of which ammonium concentration reached 98%.
+ Have studied the kinetics and explained the mechanism of the process of removing the nitrogen compounds present in the water and determined the optimal conditions of the decomposition process, thus applying successfully the TiO2 metamorphosis photocatalyst material with Nd modification coated on the substance carrying husk ash into NH4+ treatment in groundwater in Hanoi at the scale of the laboratory capacity 80 ÷100 L/day, responsed the domestic water standards (QCVN 01-1:2018/BYT).
12. Practical applied capability
The thesis contributes to the fabrication process of TiO2 nano-photocatalyst materials modified by nitrogen, neodymium and europium elements coated on rice husk ash carrier, with high photochemical ability in the natural light region with simple technology and the input materials are available in Viet Nam. Particularly, the thesis also contributes to elaborating the role of nano TiO2 modified nitrogen element and rare earth coating on rice husk ash carrier and the kinetics of decomposition of some nitrogen compounds in general and ammonium in particular to offer solutions to improve the effectiveness of handling such compounds as well as deploying practical applications.
13. Further research directions:
Research on the safety of materials towards human health to increase the practicality and feasibility of the material by evaluating the durability of the material and the stability of the photocatalytic ability.
Applying materials to treat other polluting components in the environment, especially organic components that are difficult to decompose (colors, antibiotics, pesticides)
14. Thesis-related publications:
1. Dang Thi Ngoc Thuy, Nguyen Hoang Nam, Do Khac Uan, Nguyen Thi Ha (2018), “Preparation of TiO2 nano - material coating on rice husk and application for nitrogen compound removal from water”, Vietnam Jornal of Catalysis and Adsorption. p. 97-104 Proceeding RoHan DAAD SDG Workshop 2018 “Catalysis toward sustainable chemical industry”). ISSN 0866-7411, vol 7 issue 3/2018.
2. Nguyen Hoang Nam, Dang Thi Ngoc Thuy, Nguyen Thi Thu (2018), “Synthesiserial and characterization of photocatalytic material TiO2/rice husk ash for reduce of nitrate in aqueous solution, Earth sciences and natural resources for sustainable development conference (ERSD-2018), pp 54-62.
3. Dang Thi Ngoc Thuy, Nguyễn Hoàng Nam, Nguyen Thi Ha, Nguyen Manh Khai, Nguyen Quang Duong (2020), “Research on synthetic process of rare earth element modified TiO2 nano-material and color treatment ability in water materials” Natural resources and environment magazine, vol 14(340), pp 54-56.
4. Dang Thi Ngoc Thuy, Nguyễn Hoàng Nam, Nguyen Thi Ha, Nguyen Manh Khai (2022), Current status of ammonium pollution in groundwater in Hanoi area and the possibility of treatment with modified TiO2 and TiO2. Environmental management and natural resources development international conference (EMNR 2020), pp 96-102.
5. Thuy Dang Thi Ngoc, Ha Nguyen Thi, Sen Nguyen Thi, Dung Nguyen Duc, Toan Nguyen Duc, Nam Nguyen Hoang. Preparation and photocatalytic characterization of modified TiO2/Nd/rice husk ash nanomaterial for Rifampicin removal in aqueous solution (2022). Journal of Analytical Methods in Chemistry. Special issue: Green Analytical Methods and nanomaterials for sample preparation 2021 (Q2 IF 2.193).
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