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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(SiO_2)=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%.
Their structures were characterized by XRD, BET, TEM, EDS and FT-IR respectively by in situ synthesis and impregnation method. The results showed that the prepared cermets were prepared by impregnation Cerium manganese composite silicon-based aerogels, cerium manganese metal oxide nano-size particles, pore to retain more complete.Phenol catalytic oxidation carbonylation of diphenyl carbonate reaction was investigated cerium manganese / silicon composite airgel The results showed that the catalyst prepared by impregnation was m (Ce + Mn) / m (SiO 2) = 20% supported palladium catalyst under the conditions of reaction pressure 5 MPa, reaction temperature 75 ℃ and reaction time 6 h , One-way yield of diphenyl carbonate up to 21.58%, the selectivity of 99.27%.