Preparation and Characterization of Potassium Titanate Nanofiber

doi:10.3724/SP.J.1077.2007.00237

Abstract

Abstract: Potassium titanate nanofibers ( K_1.34H_0.66Ti₂O₄(OH)₂) were prepared by using ion-exchange reaction between KOH solution and titanic acid nanotube (H₂Ti₂O₄(OH)₂). TEM and XRD results show that the nanotubes change into nanofibers and the crystalline structure alters. K/Ti atomic ratio, chemical state of K and Ti elements for the product were determined by means of atomic absorption spectrophotometry, colorimetric method, and X-ray photoelectron spectroscopy. The results indicate that the empirical formula of the product is K_1.34H_0.66Ti₂O₄(OH)₂. Compared with H₂Ti₂O₄(OH)₂ nanotubes, the thermal-stability of potassium titanate nanofibers is higher. At T>700℃, the crystalline structure of this material changes into monoclinic phase K₂Ti₄O₉. High temperature treatment results in nanofibers’ sizes increasing, but the aspect ratio is still high. The BET surface area of the material is 104m ²·g^-1.

Key words: titanate acid nanotube, potassium titanate, nanofiber, ion-exchange

WANG Xiao-Dong,JIN Zhen-Sheng,ZHANG Jing-Wei,YANG Jian-Jun,ZHANG Zhi-Jun. Preparation and Characterization of Potassium Titanate Nanofiber[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2007.00237.

References

[1] Halberstadt M L, Rhee S K, Mansfield J A. Wear, 1978, 46 (1): 109--126.
[2] Kim S J, Cho M H, Lim D S, et al. Wear, 2001, 251 (1-12): 1484--1491.
[3] Tjong S C, Meng Y Z. Polymer, 1998, 39 (22): 5461--5466.
[4] Yu D M, Wu J S, Zhou L M, et al. Composites Science and Technology, 2000, 60 (4): 499--508.
[5] Kasuga T, Hiramatsu M, Hoson A, et al. Langmuir, 1998, 14 (12): 3160--3163.
[6] 张顺利, 周静芳, 张治军, 等. 科学通报, 2000, 45 (10): 1533--1536.
[7] YANG J J, JIN Z S, WANG X D, et al. Dalton Trans. 2003, (20): 3898--3901.
[8] SUN X M, Li Y D. Chem. Eur. J., 2003, 9 (10): 2229--2238.
[9] Ma R, Bando Y, Sasaki T. Chemical Physics Letters, 2003, 380 (5-6): 577--582.
[10] ZHU H Y, GAO X P, LAN Y, et al. J. Am. Chem. Soc., 2004, 126 (27): 8380--8381.
[11] MENG X D, WANG D Z, LIU J H, et al. Materials Research Bulletin, 2004, 39 (14-15): 2163--2170.
[12] YUAN Z Y, SU B L. Colloids and Surfaces A: Physicochem. Eng. Aspects, 2004, 241 (1-3): 173--183.
[13] 付敏, 江志东, 马紫峰, 等(FU Min, et al). 无机材料学报(Journal of Inorganic Materials), 2005, 20 (4): 808--814.
[14] ZHU H Y, LAN Y, GAO X P, et al. J. Am. Chem. Soc., 2005, 127 (18): 6730--6736.
[15] Hodos M, Horv\acute ath E, Haspel H, et al. Chemical Physics Letters, 2004, 399 (4-6): 512--515.
[16] WANG B L, CHEN Q, HU J, et al. Chemical Physics Letters, 2005, 406 (1-3): 95--100.
[17] WANG B L, CHEN Q, WANG R H, et al. Chemical Physics Letters, 2003, 376 (5-6): 726--731.
[18] YUAN Z Y, ZHANG X B, SU B L. Appl. Phys. A, 2004, 78 (7): 1063--1066.
[19] SUN X M, CHEN X, LI Y D. Inorg. Chem., 2002, 41 (20): 4996--4998.
[20] 王晓冬, 李伟, 杨建军, 等. 化学研究, 2003, 14 (2): 5--8.
[21] Wagner C D, Riggs W M, Davis L E, et al. Handbook of X-Ray Photoelectron Spectroscopy, Perkin-Elmer Corporation,
Eden Prairie, Minnesota, 1979.
[22] ZHANG M, JIN Z S, ZHANG J W, et al. Journal of Molecular Catalysis A : Chemical, 2004, 217 (1-2): 203--210.
[23] Joint Committee on Powder Diffraction Standard, 32--0861.