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Summary of Environmental engineering doctoral thesis: Study on synthesis of manganese oxide, iron oxide on reduced graphene oxide nanoparticles to treatment of pigments and pesticides in the aqueous environment

Successfully synthesized nano – mixed oxide by different gelling agents; compared, selected the appropriate gelling agent; researched to evaluate the catalytic activity of mixed oxide nanoparticles formed with pollutants methyl orange (MO), methylene blue (MB). Successful dispersed mixed oxide nanoparticles on rGO; investigated catalytic activity of material systems on parathion, fenitrothion. | MINISTRY OF EDUCATION AND VIETNAM ACADEMYOF TRAINING SCIENCE AND TECHNOLOGY GRADUATE UNIVERSITY SCIENCE AND TECHNOLOGY . . Nguyen Vu Ngoc Mai STUDY ON SYNTHESIS OF MANGANESE OXIDE IRON OXIDE ON REDUCED GRAPHENE OXIDE NANOPARTICLES TO TREATMENT OF PIGMENTS AND PESTICIDES IN THE AQUEOUS ENVIRONMENT Major Environmental Engineering Code 9 52 03 20 SUMMARY OF ENVIRONMENTAL ENGINEERING DOCTORAL THESIS Hanoi 2020 The thesis was performed at Graduate University of Science and Technology Vietnam Academy Science and Technology Supervisor 1 Assoc. Prof. Dr.Nguyen Quang Trung Supervisor 2 Assoc. Prof. Dr. Dao Ngoc Nhiem Reviewer 1 Reviewer 2 Reviewer 3 . The thesis will be defended at the doctoral thesis committee at the Academy level meeting at the Graduate University of Science and Technology - Vietnam Academy of Science and Technology at on 20 . The thesis can be found in - The library of Graduate University of Science and Technology - National Library of Vietnam NEW FINDINGS OF THE THESIS 1. Successfully synthesized mixed oxide Fe2O3 Mn2O3 nanoparticles using tartaric acid AT tartaric acid combined with polyvinyl alcohol PVA as gel forming agents. Nanostructured Fe2O3-Mn2O3 mixed-oxides prepared by the combustion method that used a mixture of tartaric acid and PVA pH 4 the molar ratio of Fe Mn 1 1 the molar ratio of AT PVA 1 1 the molar ratio of Fe Mn AT PVA 1 3 the gel-forming temperature of 80 oC and the calcination temperature at 450 oC during 2h had uniform size and specific surface area of their 63.97 m2 g was larger than using only tartaric acid as gel forming agents 46.25 m2 g . 2. Studied the photocatalytic ability of Fe2O3 Mn2O3 and Fe2O3 Mn2O3 rGO materials to decompose some pollutants such as methyl orange methylene blue parathion fenitrothion. For the first time mixed oxide Fe2O3 Mn2O3 rGO nanoparticles were studied to decompose parathion and fenitrothion. The results showed that parathion was decomposed efficiency after 90 minutes reaction time pH 7.5 the .