1. Full name: Dang Van Long                                         2. Sex: Male

3. Date of birth: 08/4/1981                                              4. Place of birth: Vinh Phuc

5. Admission decision number: No 3731/QĐ-ĐHKHTN dated on 09/9/2014 by Rector of VNU University of science.

6. Changes in academic process: None

7. Official thesis title: “Synthesis, characterization, and catalytic activity of Mg-Al-CO3 hydrotalcite catalysts modified by Co2+, MoO42- ions in the liquid phase oxidation of styrene”

8. Major: Petrochemistry                                                9. Code: 62440115

10. Supervisors:            1) Assoc.Prof.Dr. Nguyen Tien Thao

                                    2) Assoc.Prof.Dr. Hoa Huu Thu

11. Summary of the new findings of the thesis

- The role of brucite layers modified by transition metal ions (Co2+) and molybdate anions intercalated into the brucite layers of Mg-Al hydrotalcite in the selective oxidation of styrene with air have been indicated.

- Co2+ ions are stabilized and posited in the brucite layers. Cobalt cations in the hydrotalcite framework exhibited a high selective oxidation of styrene to benzaldehyde and styrene oxide. Extra-lattice cobalt ions in Mg-Al-MoO4-LDH catalysts tend to undergo the oxidation of styrene to benzoic acid.

- MoO42- anions are highly active for the styrene oxidation reaction. Tetrahedral MoO42- ions in the interlayer region of brucite layers (Me-OH) act as the active centers for styrene epoxidation reaction, while the molybdates, polymolybdates show the activity to convert styrene into benzaldehyde.

12. Practical applicability, if any: Mg-Co-Al-CO3 and Mg-Al-MoO4 catalysts might have been used as catalysts for the oxidation of styrene with air to produce styrene oxide and benzaldehyde. These products are valuable materials for the pharmaceutical, favor, dyeing, agrochemical, cosmetic, chemical and some other additives industries.

13. Further research directions, if any: Developing hydrotalcite catalysts modified by other transition metals and applying their solids in the oxidation of other aromatic hydrocarbons.

14. Thesis-related publications:

Nguyen Tien Thao, Le Thi Kim Huyen, Dang Van Long (2014), “Co-doped Hydrotalcite as an Efficient Catalyst for Solvent-free Reaction Oxidation of Styrene”, Tạp chí Khoa học ĐHQGHN: Khoa học Tự nhiên và Công nghệ 30(6S), tr. 537-542.

Nguyen Tien Thao, Ngo Minh Hieu, Dang Van Long (2015), “Reaction of styrene with H2O2 catalyzed by Mg-Co-Al-CO3 hydrotalcites”, Tạp chí Hóa học 53(6e1,2), tr. 396-400.

Nguyen Tien Thao, Nguyen Duc Trung, Dang Van Long (2016), "Activity of Molybdate-Intercalated Layered Double Hydroxides in the Oxidation of Styrene with Air", Catalysis Letters 146(5), tr. 918-928. IF: 2,40. DOI 10.1007/s10562-016-1710-0.

Nguyễn Tiến Thảo, Đặng Văn Long (2016), “Oxidation of styrene over molybdenum-containing hydrotalcite catalysts”, Tạp chí Hóa học 54(4), tr. 454-458. DOI: 10.15625/0866-7144.2016-00346.

Đặng Văn Long, Hán Thị Huệ, Nguyễn Tiến Thảo, Hoa Hữu Thu (2016), “Nghiên cứu ảnh hưởng của pH đến sự hình thành xúc tác hidrotanxit Mg-Ni-Al-CO3 dùng cho phản ứng oxi hóa chọn lọc stiren bằng hidroperoxit”, Tạp chí Khoa học ĐHQGHN: Khoa học Tự nhiên và Công nghệ 4(32), tr.12-19.

Nguyen Tien Thao, Dang Van Long, Dinh Minh Hoan (2017), “Conversion of styrene into Benzaldehyde and styrene epoxide over MgCoAl-LDH catalysts”, Tạp chí Khoa học và Công nghệ 55(4), tr.403-410. DOI: 10.15625/2525-2518/55/4/8510

Nguyen Tien Thao, Nguyen Duc Trung, Dang Van Long, Vu Dong Thuc (2017), “Mg-Al-MoO4 layered double hydroxides as catalysts for the oxidation of styrene”, Tạp chí Hóa học 55(4), tr. 489-493. DOI: 10.15625/2525-2321.2017-00496

Dang Van Long, Nguyen Tien Thao (2017), “Investigation of styrene oxidation over Co-doped hydrotalcite catalysts”, Tạp chí Hóa học 55(4E23), tr. 294-298.

Dang Van Long (2017), “Selective Oxidation of Styrene over Molypdat-Intercalated Layered Double Hydroxide Catalysts”, Poster,  1st RoHan DAAD SDG Summer School 2017 “Challenges in Vietnamese Society – Impact of catalysis”, May 1st-12th, 2017, Rostock, Germany.