拱形面包 发表于 2025-3-25 07:11:42
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http://image.papertrans.cn/e/image/308252.jpg遍及 发表于 2025-3-26 03:55:19
Mélances Offerts à Juraj Andrassyoxane (MAO). The oxides used as supports were porous and high BET area materials prepared by sol-gel starting from hybrids containing the biopolymers Chitosan or Gelatin as organic counterparts. Supports were obtained through calcination at 550°C/2h of the organo-inorganic hybrid xerogels. Moreover,浪费时间 发表于 2025-3-26 08:15:32
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https://doi.org/10.1007/978-4-431-68111-3raditional method based on the impregnation of the support with the metal precursor on commercial and sol-gel supports. The calcined solids were characterised by evaluating the specific surface area and porosity by nitrogen adsorption at 77 K, TPR, TPD of ammonia, X-ray diffraction, evaluation of ba娘娘腔 发表于 2025-3-26 17:21:28
https://doi.org/10.1007/978-3-662-63610-7d as catalysts for the epoxidation of cyclohexane at two different temperatures. Only the samples containing Ti were active in the reaction being the most active the sample that was silylated. This fact was attributed to the generation of isolated titania sites. The catalysts display a complete sele