Laboratory Of Inorganic Materials

+ Main research objectives:

- Extraction and purification of rare earth elements together with their uses.

- Hydrometallurgy, separation, and recovery of certain valuable metals from ores.

- Development and utilization of diverse nanomaterials for the remediation of water and air environments.

- Adaptive technology for the treatment of liquid and solid industrial waste.

- Chemical evaluation and measurement of environmental contamination levels.

Contact information of the Head of Laboratory: Assoc. Prof. Dr. Dao Ngoc Nhiem Office address: Room 406, Building B2, 18 Hoang Quoc Viet, Nghia Do, Hanoi Contact number: +84 915417696 Email: nhiemdn@ims.(*) - replace (*) = vast.ac.vn

LIST OF ALL MEMBERS

MAIN ACHIEVEMENTS

• Developed an advanced processing methodology for xenotime concentrate to significantly improve the recovery efficiency of rare earth elements.
• Synthesized trace element-containing foliar fertilizers enriched with rare earth elements to promote crop growth and support sustainable and environmentally friendly agricultural practices.
• Fabricated rare earth-based nanocatalysts specifically designed for the effective removal of toxic exhaust gases including carbon monoxide (CO), toluene, benzene, nitrogen oxides (NO_x), and various hydrocarbons.
• Engineered nanomaterials integrated with rare earth elements for the treatment of contaminated water, targeting the removal of hazardous pollutants such as iron (Fe), arsenic (As), manganese (Mn), and ammonium ions (NH4⁺).
• Established an innovative method for the production of nano silver from metallic silver, characterized by cost-effective and simple equipment requirements, yielding high-purity nano silver with uniform particle size, controllable distribution in water, and minimized impurities.

Figure 1. Foliar fertilizer containing trace rare earth elements (NANO-REM)

Figure 2. Patent for the processing method of xenotime concentrate

PUBLICATIONS

1. Dao Ngoc Nhiem, Nguyen Quang Bac, Pham Ngoc Chuc, Nguyen Thi Ha Chi, Nguyen Trung Kien, Luu Thi Viet Ha, Method for processing xenotime mineral, VN Patent No. 44433.
2. Dao Ngoc Nhiem, Nguyen Thi Ha Chi, Pham Ngoc Chuc, Cao Van Hoang, Doan Trung Dung, Nguyen Quang Bac, Nguyen Thi Dieu Cam, Nguyen Vu Ngoc Mai, Duong Thi Lim, Dinh Quang Khieu, Processing technology for monazite ore, VN Patent No. 41857.
3. Dao Ngoc Nhiem, Nguyen Thi Ha Chi, Nguyen Quang Bac, Pham Ngoc Chuc, Doan Trung Dung, Nguyen Vu, Cao Van Hoang, Nguyen Vu Ngoc Mai, Nguyen Thi Dieu Cam, Duong Thi Lim, Pham Ngo Nghia, Process of manufacturing organic fertilizer containing Co Zn Mo, VNPatent No. 34960.
4. Nguyen, C.T.H., Nguyen, K.T., Nguyen, B.Q., Pham, C.N., Van Ngo, Q., Dao, H.N., Luu, H.T.V., Nguyen, M.V.N. and Dao, N.N., 2025. Synthesis of monoclinic clinobisvanite BiVO₄ for effective visible-light degradation of antibiotics in water: Photocatalytic performance, reaction kinetics, and mechanism. Powder Technology, 453, p.120650. Impact factor: 4.6
5. Luu, T.V.H., Dao, N.N., Nguyen, Q.B., Nguyen, T.H.C., Pham, N.C., Dao, N.H. and Nguyen, T.K., 2025. Microwave-assisted synthesis of self-assembled C-doped-ZnO/gC₃N₄ heterojunction catalysts for effective photodegradation of ofloxacin antibiotic. Nanoscale Advances, 7(10), pp.2916-2928. Impact factor: 4.6
6. Duong, L.T., Nguyen, H.T.L., Nguyen, T.T.H., Dang, Q.T., Dao, N.N., Nguyen, K.T., Duong, D.C., Tran, N.T.H., Nguyen, H.T. and Nguyen, B.Q., 2025. Abundance, distribution, and seasonal variation of marine litter on the beaches of central Vietnam. Marine Pollution Bulletin, 216, p.118046. Impact factor: 4.9
7. Le, H.B., Nguyen, K.T., Nghiem, T.X., Nguyen, B.Q., Nguyen, C.T.H., Pham, C.N., Nguyen, T.K. and Dao, N.N., 2024. Efficient photocatalytic remediation of persistent organic pollutants using magnetically recoverable spinel manganese ferrite nanoparticles supported on activated carbon. Materials Research Bulletin, 178, p.112913. Impact Factor: 5.6
8. Nguyen, T.L.H., Duong, T.L., Nguyen, T.H.T., Dang, T.Q., Nguyen, T.H., Dao, N.N., Nguyen, K.T., Duong, C.D., Pham, N.N. and Nguyen, B.Q., 2023. Microplastics and trace metals in river sediment: Prevalence and correlation with multiple factors. Science of The Total Environment, p.165145. Impact Factor: 9.8
9. Pham, N.C., Vo, T.K., Nguyen, Q.B., Nguyen, T.K., Nguyen, T.H.C., Dao, N.N., Kim, J. and Nguyen, V.C., 2023. Ethylenediamine-entrapped defective UiO-66 (Zr) frameworks for improved CO2 adsorption and selectivity. Inorganic Chemistry Communications, 158, p.111476. Impact Factor = 3.8.