Synthesis and characterization of Cr-containing silica gel and Ti-containing silica gel

Abstract

Silica gel has a lot of advantages in the actual production of life. Here, the main purpose is to use the abundant silicon hydroxyl silicone surface can be modification, surface chemical bonding and operation are understood and applied by experiment. Chromium-containing mesoporous silica gel and Titanium-containing silica gel have been synthesized at ambient temperature using sol-gel method adding different amount of Cr and Ti. In this paper, a lot of measurement used to measure various properties of the chromium silicon gel, such as measurement of Raman spectra, measurement of diffuse reflectance UV-visible spectroscopy, measurement of infrared ray absorption, measurement of surface area, etc. With these measurement, we can come to a conclusion, with the synthesis of silica gel containing chromium in this method, Cr(III) will be excluded and Cr(VI) was left, and the synthesis of silica gel containing titanium, it was possible to prepare materials without forming extra TiO2. At the same time, other impurities were cleaned in the washing and burning. Also, the product has high activity for the selective oxidation of styrene and large surface area and pore volume. This experiment method compared with other method, the advantage is simple, the synthesis time is shorter, low cost, good repeatability and can be smoothly in the ordinary environment. It is suitable for industrial production.