1. Full name: Ngo Tien Quyet                                                     2. Sex: male

3. Date of birth: 28/06/1984                                            4. Place of birth: Bac Ninh

5. Admission decision number: No. 6089/QĐ-ĐHKHTN on 31/12/2013 by the Rector of VNU University of Science (PhD. student from 911 Project).

6. Changes in academic process:

7. Official thesis title: Synthesis and characterization of iron and graphene oxides- based nanocomposites for the oxidation of phenol from aqueous solution.

8. Major: Organic Chemistry                                           9. Code: 62.44.01.14

10. Supervisors: Assoc. Prof. Vu Anh Tuan

11. Summary of the new findings of the thesis

- Successful synthesis of the novel photocatalytic nanocomposites: Fe3O4/GO, Fe-Fe3O4/GO, CuFe2O4/GO, Fe/GO, Cu-Fe/GO by different methods: co-precipitation followed by thermal reduction and atomic implantation method for synthesis of Fe/GO and Cu-Fe/GO. This is a new developed method, which has not been reported in literature yet.

- From the characterization result, it revealed that the nano composite catalysts are consisted of small nanoparticles Feo ,Fe2O,Fe3O4 and CuO with uniform size distribution (HR - TEM, mapping). XPS result demonstrated the existence of Fe in various oxidation states and especially in the presence of Feo, Cu+ reduced Fe3+ to the lower valence state of Fe2+.

- The catalysts are highly active in the phenol degradation, especially Cu-Fe/GO catalysts have the highest activity due to small particle size, high dispersion, and a high number of active sites.

- Successful identification of short-chain organic acids (C1-C3) as the intermediate products prior to transform to CO2 and H2O by using combination  HPLC and LC/MS/MS. This is also a new result and contribution of the thesis.

12. Practical applicability, if any: phenol is one of the toxic organic polutants existed in the waste water of the chemical industry, petro-refining industry, metallurgical industry… causing the serious invironmental polution. There for, phenol treatment is necessary, highly practical application. The successful synthesis of the new catalyst system with high efficiency for phenol removal contributed significantly the development of new technology in treatment of waste industrial water containing phenol and other toxic organic polutants.

13. Further research directions, if any:

- Continuing research and development of new catalysts by modifying the obtained catalyst systems in order to improve the activity of catalysts.

- Study on the possibility of replacing the oxydant of H2O2 by O3 produced from air ozonization to minimize the wastewater treatment cost.

- Development of a new catalyst system based on base catalyst system for catalytic ozonization.

14. Thesis-related publications:

[1] Ngo Tien Quyet, Le Ha Giang, Nguyen Ke Quang, Vu Anh Tuan (2016), “Synthesis of novel nano composite Fe/GO with highly photocatalytic performance in the phenol degradation”, Vietnam Journal of Chemistry, 54 (5e1,2), pp.61 – 65.

[2] Ngo Tien Quyet, Le Ha Giang, Nguyen Ke Quang, Nguyen Thanh Tuan, Nguyen Trung Kien, Dang Tuyet Phuong, Tran Thi Kim Hoa and Vu Anh Tuan (2016), “Synthesis, characterization and application of novel CuFe2O4/GO nano composite in photocatalytic degradation of phenol”, Vietnam Journal of Chemistry, 54 (6e2), pp.89 – 93.

[3] Ngo Tien Quyet, Le Ha Giang, Nguyen Ke Quang, Nguyen Thanh Tuan, Quan Thi Thu Trang, Dang Tuyet Phuong, Ngo Quang Binh and Vu Anh Tuan (2017), “One-step synthesis of novel nano composite Cu/Fe/GO with highly photocatalytic performance in the phenol degradation”, Viet Nam Journal of Catalysis and Adsorption, 6 (No 3), pp.59 – 65,  ISSN 0866-7144.

[4] Giang H. Le, Quyet T. Ngo, Tuan T. Nguyen, Quang K. Nguyen, Trang T. T. Quan, Tuan A. Vu (2017), “highly photocatalytic activity of novel CuFe2O4/GO nano composite in the degradation of phenol on aqueous solution”, Physical Chemistry, 7(1), pp.8 – 16, 2017, DOI: 10.5923/j.pc.20170701.02.