Abstract：In this paper, ZrO(OH)2 was prepared with sol-gel method, then a series of metal-ions-doped SO2-4/ZrO2 nanosolid superacids were prepared by impregnated ZrO(OH)2 using diluted H2SO4 and Ni2+, Al3+, Sn4+, Ag+, Sn2+ etc. salt solutions. The samples were characterized by IR, XRD, TEM and chemical analysis method. The result shows that the IR spectra of samples are the characteristic spectra of the solid superacids. The stretching frequencies of Zr—O and SO in Ni2+ and Sn4+ doped samples are obviously increased, the νZr—O values of Zr—O increase from 485 cm-1 for SO2-4/ZrO2 to 500 cm-1 for both Ni2+ and Sn4+ doped samples, the νas values of SO increase from 1 390 cm-1 for SO2-4/ZrO2 to 1 405 and 1 400 cm-1 for Ni2+ and Sn4+ doped samples respectively, but that in Sn2+ doped sample increases a little. It is indicated that the samples doped by Ni2+ and Sn4+ show higher super acidity than SO2-4/ZrO2. The IR spectra of samples were determined at different calcination temperatures. It was found that the stretching frequencies of Zr—O and SO in Ni2+ and Al3+ doped samples are obviously increased with the increase in calcination temperature, but that in Ag+ doped sample is not.
[1] Suja H, Deepa C S, Sreeja Rani K et al. Appl. Catal., 2002, 230：233. [2] CＨＥＮ Tong-yun, GU Xu-peng, HU Xiang-yu(陈同云, 古绪鹏, 胡祥余). Chinese J. Inorg. Chem.(无机化学学报), 2002, 18(4): 378. [3] Vera C R, Pieck C L, Shimizu K et al. Appl. Catal., 2002, 232: 169. [4] Reddy B M, Sreekanth P M, Yamada Y et al. Appl. Catal., 2002, 228: 269. [5] Jin T, Yamaguchi T, Tanabe K. J. Phys. Chem., 1986, 90: 4794. [6] ZHANG Han-hui, JIANG Feng-ling, YANG Rong-sheng, SUN Rui-qing, YANG Qi-yu et al(张汉辉, 江凤玲, 杨融生，孙瑞卿，杨齐愉等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2000, 20(6): 761. [7] LIN De-juan, PAN Hai-bo, SHEN Shui-fa，CHEN Nai-sheng, HUANG Jin-ling et al(林德娟, 潘海波, 沈水发，陈耐生，黄金陵等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2000, 20(5): 616. [8] Garvie R C. J. Phys. Chem., 1965, 69(4): 1238. [9] Yamaguchi T, Jin T, Tanabe K. J. Phys. Chem., 1986, 90: 3148.
