微孔多酸Cs_xH_(5-x)PW_(10)V_2O_(40)/SiO_2的制备及氧化催化作用  

Synthesis and Oxidative Catalysis of Microporous Heteropolyoxometalates Cs_xH_(5-x)PW_(10)V_2O_(40)SiO_2

作　　者：彭革[1] 胡长文[1] 王永慧[1] 陈立东[1] 王恩波[1] 冯守华[2] 刘彦勇 

机构地区：[1]东北师范大学化学学院多酸化学研究所,长春130024 [2]吉林大学无机合成与制备化学国家重点实验室,长春130023 [3]日本千叶开发研究所化学技术部

出　　处：《高等学校化学学报》2002年第3期478-480,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :2 0 0 710 0 7)资助

摘　　要：Microporous heteropolyoxometalates Cs\-\%x\%H\-\{5-\%x\%\}PW\-\{10\}V\-2O\-\{40\}/SiO\-2 were synthesized by a sol\|gel technique and characterized by IR, UV\|Vis, BET adsorption/desorption isotherm. The structural frameworks of Cs\-\%x\%H\-\{5-\%x\%\}PW\-\{10\}V\-2O\-\{40\} are preserved within the silica networks. Cs\-\%x\%H\-\{5-\%x\%\}PW\-\{10\}V\-2O\-\{40\}/SiO\-2 are a kind of polyoxometalate\|silica gel hybrids with uniform micropores of ca. 0.65 nm. They show a high catalytic activity for oxidation reaction of benzyl alcohol by H\-2O\-2(30%) in liquid\|solid systems and product selectivity for benzaldehyde(>96%). The highest activity is observed at \%x\%=2.5 in Cs\-\%x\%H\-\{5-\%x\%\}PW\-\{10\}V\-2O\-\{40\}/SiO\-2 and little formation of benzoic acid and a more deeply oxidized product is observed.Microporous heteropolyoxometalates Cs\-\%x\%H\-\{5-\%x\%\}PW\-\{10\}V\-2O\-\{40\}/SiO\-2 were synthesized by a sol\|gel technique and characterized by IR, UV\|Vis, BET adsorption/desorption isotherm. The structural frameworks of Cs\-\%x\%H\-\{5-\%x\%\}PW\-\{10\}V\-2O\-\{40\} are preserved within the silica networks. Cs\-\%x\%H\-\{5-\%x\%\}PW\-\{10\}V\-2O\-\{40\}/SiO\-2 are a kind of polyoxometalate\|silica gel hybrids with uniform micropores of ca. 0.65 nm. They show a high catalytic activity for oxidation reaction of benzyl alcohol by H\-2O\-2(30%) in liquid\|solid systems and product selectivity for benzaldehyde(>96%). The highest activity is observed at \%x\%=2.5 in Cs\-\%x\%H\-\{5-\%x\%\}PW\-\{10\}V\-2O\-\{40\}/SiO\-2 and little formation of benzoic acid and a more deeply oxidized product is observed.

关 键 词：微孔杂多酸 制备 结构表征 苯甲醇 氧化催化 苯甲醛 催化剂 杂多酸铯盐 二氧化硅载体 

分 类 号：O625.41[理学—有机化学] O643.361[理学—化学]