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Nguyen, Hoang Hai Nguyen, Dang Phu This paper studied the effects of Co, Ni replacement in the nanoparticles, pH, weight of nanoparticles/ml of qater and time of stirring on the arsenic removal ability. The removal was also affected by the pH of the water. The presence of Ni improved the absorption in most cases. Chi tiết xin mời tham khảo tại http://repository.vnu.edu.vn/handle/VNU_123/56806   Title:  Arsenic removal from water by magnetic Fe1-xFe2O4 and Fe1-yNiy Fe2O4 nanoparticles Authors:  Nguyen, Hoang Hai Nguyen, Dang Phu Keywords:  Magnetic nanoparticles;ferrites;arsenic removal;water treatment Issue Date:  2009 Publisher:  H. : ĐHQGHN Series/Report no.:  Vol. 25;No. 1 (2009) Description:  p. 15-19 URI:  http://repository.vnu.edu.vn/handle/VNU_123/56806 ISSN:  2588-1124 Appears in Collections: Mathematics and Physics

Truong, Thanh Trung Do, Thi Nhung Nguyen, Thi Thanh Van Nguyen, Hoang Nam Nguyen, Hoang Luong CoxPt100- x nanoparticles (x=50, 59, and 73) were prepared by the chemical reduction of Cobalt (II) chloride and Chloroplatinic acid, then ultrasonicated for 2 h. After annealing at various temperatures from 450 C to 700 C for 1 h, structure change was observed and samples show hard magnetic prop-erties which depend strongly on chemical composition and annealing temperature. The highest coer-civity value of 1.15 kOe was obtained at room temperature for sample with x =50 annealed at 500 C. Chemical reduction combined with ultrasound is a useful method to prepare CoPt nanoparticles Chi tiết xin mời tham khảo tại http://repository.vnu.edu.vn/handle/VNU_123/58327 Title:  Magnetic properties of CoxPt100 - x nanoparticles Authors:  Truong, Thanh Trung Do, Thi Nhung Nguyen, Thi Thanh Van Nguyen, Hoang Nam Nguyen, Hoang Luong Keywords:  CoPt;Magnetic nanoparticles;L10struct...