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金属离子同晶置换对TiO2 A→R相变的影响研究 郑昆1,符春林2,张朝阳3,魏锡文3,张海东3 (1.西南农业大学基础部,重庆 400016;2.电子科技大学信息材料学院,成都 610054;3.重庆大学环境与化学化工学院,重庆 400044) 摘要: 二氧化钛的金红石型(Rutile)和锐钛型(Anatase)产品中,前者具有更广泛的用途,更好的性能,更高的价格.锐钛型TiO2转变为金红石型Ti02(简称A→R相变)的温度通常为610℃~915℃,且转化时间较长.由转变温度-时间关系图[1]可以发现,在800℃煅烧24h也难以使转化率达到100%.在工业生产中,通常用的回转窑只能加热到800℃左右,因而需要采取措施来降低转化温度,提高转化率. [全文内容正在添加中] ......
), and electrochemical testing. The results show that the materials are well crystallized and fluoride doping cannot change the space structure of LiFePO4. Slight amounts of Fe2O3 with no fluoride impurity......
(TEM). The results show that the relative intensity of 101 peak of anatase and 002 peak of rutile, the mean crystal diameter and mean particle diameter of Y2O3/TiO2 samples decrease while specific surface area increases owing to doping Y2O3. Y2O3/TiO2 samples have a larger specific surface area and higher thermal stability. Owing to quantum size effect, the reflectance of Y2O3/TiO2 samples is larger......
J. Cent. South Univ. (2018) 25: 783-794 DOI: https://doi.org/10.1007/s11771-018-3783-y Properties of boron-rich slag separated from boron-bearing iron concentrate WANG Guang(王广), WANG Jing-song(王静松..., part of Springer Nature 2018 Abstract: In the present paper, the fundamental research on the properties of boron-rich slag melting separated from boron-bearing iron concentrate was performed......
表面修饰TiO2光催化薄膜的表征 潘峰1,程躜1,郝维昌1,蒋湘宁2,赵艳玲2,郑树凯1,王天民1 (1.北京航空航天大学,北京,100083;2.北京林业大学,北京,100083) 摘要:利用射频磁控溅射技术,以Ar和O2气混合气体为溅射气体在载玻片上制备了锐钛相TiO2薄膜.为了提高TiO2薄膜的光催化活性,在TiO2薄膜表面进行了钽修饰.利用X射线衍射(XRD),原子力显微镜(AFM)和UV-VIS-NIR分光光度计等技术对薄膜进行了表征.结果表明:对TiO2薄膜的表面进行适量的Ta元素修饰可以提高其光催化活性. 关键词:TiO2薄膜; 表面修饰; 光催化活性; TiO2 thin film; surface modification; photocatalytic activity; [全文内容正在添加中] ......
in this direction. The growth rate on and planes is relatively fast, resulting in a flaky shape. The iron oxide flakes with regular hexagonal structure are formed primarily because... have incorporated the internal structure of iron oxide flakes. Table 6 Chemical composition of hydrothermal product synthesized with optimal experimental parameters (mass fraction, %) 3.3 Quality......
of rare earth ions doping on photocatalytic properties of TiO2 and found the bandgap of the catalysts shift into the visible region[4-6]. However, practical applications of photocatalysis are limited... and easy control of the doping level. In this work, neodymium doping TiO2 was loaded to SiO2 to prepare Nd/TiO2-SiO2 using inexpensive SiO2 as supporter. The Nd/TiO2-SiO2 samples were characterized......
plasma spray. Lanthanum trivalent ion doping increased the photocatalytic activity of TiO2 greatly, the optimal doping concentration was 0.5%. The doped powders were the mixture of anatase phase and rutile phase. The contents of anatase phase decreased firstly and then increased with an increase in the contents of lanthanum trivalent ion. Doping lanthanum trivalent ion could make the TiO2......
J. Cent. South Univ. Technol. (2009) 16: 0236-0241 DOI: 10.1007/s11771-009-0040-4 Effect of doping Bi on oxygen evolution potential and corrosion behavior of Pb-based anode in zinc electrowinning...; Abstract: A new anodic material of ternary Pb-0.8%Ag-(0-5.0%)Bi alloy for zinc electrowinning was obtained by doping Bi. The anodic oxygen evolution potential, corrosion rate......
Kinetic study on pressure leaching of high iron sphalerite concentrate XIE Ke-qiang(谢克强)1, YANG Xian-wan(杨显万)1, WANG Ji-kun(王吉坤)2, YAN Jiang-feng(阎江峰)2, SHEN Qing-feng(沈庆峰)2 1. Faculty...; Abstract: The kinetics of pressure leaching high iron sphalerite concentrate was studied. The effects of agitation rate, temperature, oxygen partial pressure, initial acid concentration, particle size......
