The mesoporous hydroxyapatite （HA） was synthesized by hydrothermal method utilizing cationic surfactant cetyltrimethylammonium bromide （CTAB） as template. The crystalline phase, morphology and porous structure wer...The mesoporous hydroxyapatite （HA） was synthesized by hydrothermal method utilizing cationic surfactant cetyltrimethylammonium bromide （CTAB） as template. The crystalline phase, morphology and porous structure were characterized respectively by different detecting techniques. The results reveal that the particles are highly crystalline hydroxyapatite phase. The surfactant has little influence on the morphology of the crystals, but affects the porous structure obviously. The sample without CTAB has a low surface area not exceeding 33 m^2/g, and no distinct pores can be observed by TEM. While the samples obtained with the surfactant get better parameters. Numerous open-ended pores centered at 2-7 nm spread unequally on the surface of the hydroxyapatite nanorods. The N2 adsorption-desorption experiments show type IV isotherms with distinct hysteresis loops, illustrating the presence of mesoporous structure. When the mole ratio of CTAB to HA is 1：2, the sample has the largest surface area of 97.1 m^2/g and pore volume of 0.466 cm^3/g.展开更多
采用表面活性剂模板合成法制备TiO2P2O5纳米复合材料,并用X射线衍射（XRD）、透射电子显微镜（TEM）和恒流充放电等测试手段对复合材料的结构、形貌及其电化学性能进行了研究。电化学性能研究表明TiO2P2O5复合材料表现出比纯TiO2更高的...采用表面活性剂模板合成法制备TiO2P2O5纳米复合材料,并用X射线衍射（XRD）、透射电子显微镜（TEM）和恒流充放电等测试手段对复合材料的结构、形貌及其电化学性能进行了研究。电化学性能研究表明TiO2P2O5复合材料表现出比纯TiO2更高的初始充电容量和循环稳定性。90TiO210P2O5复合材料表现出最好的电化学性能,初始充电容量达到207 m Ah/g,明显高于纯TiO2材料（143 m Ah/g）。经过30次循环后,90TiO210P2O5复合材料的充电容量仍为168 m Ah/g,而纯TiO2材料只有70 m Ah/g。复合材料电化学性能提高的原因可能与样品的晶粒大小和比表面积有关。展开更多
基金Projects(51102285,81170912)supported by the National Natural Science Foundation of ChinaProject supported by the Open Foundation of State Key Laboratory of Powder Metallurgy,China
文摘The mesoporous hydroxyapatite （HA） was synthesized by hydrothermal method utilizing cationic surfactant cetyltrimethylammonium bromide （CTAB） as template. The crystalline phase, morphology and porous structure were characterized respectively by different detecting techniques. The results reveal that the particles are highly crystalline hydroxyapatite phase. The surfactant has little influence on the morphology of the crystals, but affects the porous structure obviously. The sample without CTAB has a low surface area not exceeding 33 m^2/g, and no distinct pores can be observed by TEM. While the samples obtained with the surfactant get better parameters. Numerous open-ended pores centered at 2-7 nm spread unequally on the surface of the hydroxyapatite nanorods. The N2 adsorption-desorption experiments show type IV isotherms with distinct hysteresis loops, illustrating the presence of mesoporous structure. When the mole ratio of CTAB to HA is 1：2, the sample has the largest surface area of 97.1 m^2/g and pore volume of 0.466 cm^3/g.
文摘采用表面活性剂模板合成法制备TiO2P2O5纳米复合材料,并用X射线衍射（XRD）、透射电子显微镜（TEM）和恒流充放电等测试手段对复合材料的结构、形貌及其电化学性能进行了研究。电化学性能研究表明TiO2P2O5复合材料表现出比纯TiO2更高的初始充电容量和循环稳定性。90TiO210P2O5复合材料表现出最好的电化学性能,初始充电容量达到207 m Ah/g,明显高于纯TiO2材料（143 m Ah/g）。经过30次循环后,90TiO210P2O5复合材料的充电容量仍为168 m Ah/g,而纯TiO2材料只有70 m Ah/g。复合材料电化学性能提高的原因可能与样品的晶粒大小和比表面积有关。
