蠕虫孔状介孔Cr_2O_3的制备与表征

Preparation and characterization of wormhole-like mesoporous Cr_2O_3

以硝酸铬为金属源,活性炭为硬模板,用真空辅助浸渍法制备了蠕虫孔状介孔Cr_2O_3,采用XRD、BET、TEM、TPR和UV-Vis对样品的物化性能进行了表征。结果表明,制备的介孔Cr_2O_3是具有六方晶型和比表面积高达112m^2·g^(-1)的晶体,平均孔径约6.5nm,与体相材料相比,介孔Cr_2O_3表现出良好的低温还原性能和吸光性能,这与其表面形貌和晶体结构有关。

Using activated carbon as the like mesoporous chromium oxides were chemical properties were characterized sion electron microscopy, temperature spectroscopy. The results showed that the hard template and chromic nitrate as the metal source, the wormhole- prepared by the vacuum impregnation method, and their physico- by means of X-ray diffraction, N2 adsorption-desorption, transmis- programmed reduction and ultraviolet-visible reflectance diffuse hexagonal lattice chromium oxide with surface area 112 m^2 g^-1 and average pore diameter about 6.5 nm was obtained. Compared with bulk material, mesoporous chromium oxide exhibited better low-temperature reducibility and momhology, and crystal structure of the material. absorption performance ,which related to the surface