20 October 2009 Preparation of nano-TiO2 powder by polyacrylamide gel method
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Proceedings Volume 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering; 749362 (2009) https://doi.org/10.1117/12.840137
Event: Second International Conference on Smart Materials and Nanotechnology in Engineering, 2009, Weihai, China
Abstract
Polyacrylamide gel method is a new successful technique for preparing nanometer metallic oxide materials, such as α-Al2O3, ZnO and ZrO2. TiO2 made by this method, however, has not been reported. In this study, the nano-TiO2 powder was prepared using the novel method with TiCl3 as raw materials, and with acrylamide and N,N'-methylenediacrylamide as crosslinking agent. The TG showed that the optimization sintering process is that: the polyacrylamide gel was dried at 110°C for 2 hour to obtain the xerogel, and then the grinded xerogel was sintered up to 450°C, meanwhile, kept at 250°C, 410°C and 450°C for 1 hour, respectively, to gain TiO2 particles. The grain size of TiO2 particles is smaller than 25 nm. And those particles are spherical approximately and have good distribution because of the hindering effect of space grid structure. Adding SO4 2- in the polyacrylamide gel process can maintain the content of anatase-TiO2 phase at higher sintering temperature. This may be explained that the SO4 2- can form coordination compound with Ti4+. And the coordination compound is prone to generate anatase-TiO2 with the burning out of SO4 2- , in which structure the adjacent two TiO6 hexahedrons share only one oxygen atom.
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Xiaowei Fan, Xiaowei Fan, Xiaoping Liang, Xiaoping Liang, Guanqun Guo, Guanqun Guo, Rongtao Wang, Rongtao Wang, Jianxin Li, Jianxin Li, } "Preparation of nano-TiO2 powder by polyacrylamide gel method", Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 749362 (20 October 2009); doi: 10.1117/12.840137; https://doi.org/10.1117/12.840137
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