MPhil Thesis http://reposit.library.du.ac.bd:8080/xmlui/xmlui/handle/123456789/196 2026-04-07T02:16:18Z 2026-04-07T02:16:18Z Non-metal Doped TiO2 Nanocomposites for the Removal of Nuclear Waste from Water Hassan, Md. Mehedi http://reposit.library.du.ac.bd:8080/xmlui/xmlui/handle/123456789/4796 2026-03-03T07:49:55Z 2026-03-03T00:00:00Z Non-metal Doped TiO2 Nanocomposites for the Removal of Nuclear Waste from Water Hassan, Md. Mehedi This study focuses on the synthesis and evaluation of non-metal doped titanium dioxide (TiO2) nanoparticles for the potential remediation of radionuclide-contaminated water. Undoped TiO2 and doped TiO2, e.g., B-doped TiO2 (B–TiO2), C-doped TiO2 (C–TiO2), N-doped TiO2 (N–TiO2) were successfully prepared by the sol-gel method. The resultant nanoparticles were thoroughly characterized by XRD, FESEM, EDX, TEM, FTIR, UV–Vis spectroscopy, DLS, zeta potential measurement, and AAS to study their structural, morphological, optical, and adsorption properties. Furthermore, batch adsorption and photocatalytic experiments using adsorbents were conducted to assess their efficiency in radionuclide removal. While attempting to extract radioactive isotopes from water, real radionuclides were not implemented due to safety, cost, and facility constraints. Instead, the nonradioactive analogs—cobalt, iodine, manganese, and zinc (which have similar radioisotopes, such as 60Co2+, 131I-, 54Mn2+, and 65Zn2+)—were employed, due to their similarity with the radioactive elements. XRD results revealed that both the doped and undoped TiO2 were crystalline anatase, and B-doping led to the formation of a small amount of the rutile phase. Both SEM and TEM images showed that the morphology and particle dimension were influenced by doping, with the smallest average particle size being reached for C–TiO2. The adsorption capacity was evaluated using iodine adsorption and the removal of metal ions. The C–TiO2 and N–TiO2 nanocomposites were found to show excellent adsorption properties among the doped samples, which may be due to a higher surface area and improved surface chemistry. The findings indicate that non-metal doping can enhance the photocatalytic and adsorption activity of TiO2. Thus, these materials are promising candidates for treating radioactive wastewater. This thesis is submitted for the degree of Master of Philosophy. 2026-03-03T00:00:00Z Effect of fillers on the performance of surface modification of plywood with epoxy acrylate by UV radiation http://reposit.library.du.ac.bd:8080/xmlui/xmlui/handle/123456789/4642 2025-05-26T08:56:27Z 2025-05-26T00:00:00Z Effect of fillers on the performance of surface modification of plywood with epoxy acrylate by UV radiation This thesis is submitted for the degree of Master of Philosophy. 2025-05-26T00:00:00Z Removal of arsenic from contaminated tube well water Haque, Md. Mozaharul http://reposit.library.du.ac.bd:8080/xmlui/xmlui/handle/123456789/4641 2025-05-26T08:55:01Z 2025-05-26T00:00:00Z Removal of arsenic from contaminated tube well water Haque, Md. Mozaharul This thesis is submitted for the degree of Master of Philosophy. 2025-05-26T00:00:00Z Surface modification of solid polymers with acrylic monomer by photoinduced polymerization Akter, Ferdous http://reposit.library.du.ac.bd:8080/xmlui/xmlui/handle/123456789/4640 2025-05-26T08:53:29Z 2025-05-26T00:00:00Z Surface modification of solid polymers with acrylic monomer by photoinduced polymerization Akter, Ferdous This thesis is submitted for the degree of Master of Philosophy. 2025-05-26T00:00:00Z