| 洪超,徐潮,苏伟,吕庆阳,彭梦,袁华.铈锰/硅基气凝胶载体的制备及其在合成碳酸二苯酯中的应用[J].分子催化,2017,31(4):348-355 |
| 铈锰/硅基气凝胶载体的制备及其在合成碳酸二苯酯中的应用 |
| Preparation of Cerium-Manganese Composite Aerogel Supports and the Application in the Synthesis of Diphenyl Carbonate |
| 投稿时间：2017-08-03 修订日期：2017-07-10 |
| DOI： |
| 中文关键词: 硅气凝胶 铈锰复合氧化物 催化氧化 碳酸二苯酯 |
| 英文关键词:silica aerogels cerium-manganese composite oxide catalytic oxidation diphenyl carbonate |
| 基金项目:国家自然科学基金（51474160），湖北省自然科学基金（2016CFA079） |
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| 中文摘要: |
| 分别采用原位合成法、浸渍法制备不同组成的铈锰/硅基气凝胶载体，利用XRD、BET、TEM、EDS、FT-IR等手段对其结构进行表征.结果表明：采用浸渍法制备的铈锰/复合硅基气凝胶，铈锰金属氧化物为纳米尺寸颗粒，孔道保留较为完整.以苯酚催化氧化羰基化合成碳酸二苯酯反应，考察了铈锰/硅基复合气凝胶载体载钯催化剂的催化性能，结果表明以浸渍法制备组分为m（Ce+Mn）/m（SiO2）=20%载钯催化剂，在反应压力5 MPa、反应温度75℃、反应时间6 h时，碳酸二苯酯单程收率可达21.58%，选择性为99.27%. |
| 英文摘要: |
| Cerium-manganese composite silica aerogel carriers were prepared by in-situ synthesis and impregnation methods respectively. The samples were characterized by XRD, FT-IR, BET, TEM and EDS methods. The results showed that cerium-manganese oxide particles in silica aerogel carriers prepared by impregnation were in nano-size and those composite carriers remained intact pore. The catalytic performance for corresponding palladium-supported catalysts were investigated on the synthetic reaction of dipenyl carbonate by catalytic oxidation of phenol.The catalytic activity of Pd/20%(Ce+Mn)-SiO2 under impregnation was much higher, over which the single pass yield of DPC reached 21.58% with selectivity above 99.27% under a totalpressure of 5 MPa at 75℃ for 6 h. |
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