Abstract: Niobium-containing mesoporous molecular sieves Nb-SBA-15 were synthesized by using Nb₂O₅ as niobium source. The molecular sieves were characterized by means of small angle XRD, BET, FT-IR，DTA. The results show that with niobium loaded on SBA-15, it possess characteristic structure of SBA-15. The (Z)-Nb-SBA-15 molecular sieve catalyst has a high catalytic activity for the oxidition of styrene, at the temperature 70 ℃, n(styrene)/n(H₂O₂)/n(acetone)= 1∶2∶2, the quantity of catalyst was 10.0% of [KG*4]the [KG*4]raw [KG*4]material, reaction [KG*4]time 10 h, the [KG*4]conversion [KG*4]of [KG*4]styrene [KG*4]is [KG*4]up [KG*4]to 43.21%, the selectivity of benzaldehyde is up to 94.32%, and the catalyst has good stability, is a preferred solid acid catalyst.

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摘要： 以Nb₂O₅为铌源直接合成Nb-SBA-15，通过X射线衍射（XRD）、氮气吸附脱附分析（BET）、红外光谱（FT-IR）、热重分析（DTA）表征手段对其结构进行分析。结果表明，铌负载于SBA-15后，仍保留SBA-15的高度有序的二维六方介孔结构。(Z)-Nb-SBA-15分子筛催化剂对苯乙烯氧化反应具有较高的催化活性，温度为70 ℃，n（苯乙烯）/n（过氧化氢）/n（丙酮）=1∶2∶2，催化剂质量为原料质量的10.0%的条件下反应10 h，苯乙烯的转化率达到43.21%，苯甲醛的选择性为94.32%，且该催化剂稳定性较好，是性能良好的固体酸催化剂。

关键词: (Z)-Nb-SBA-15 , 催化氧化 , 苯乙烯 , 苯甲醛