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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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磺酸官能化的磁性核壳结构的纳米材料用于果糖脱水制备5-羟甲基糠醛
DOI: 10.1016/S1872-2067(12)60739-6, PP. 703-708
Keywords: 磁性粒子,纳米催化剂,果糖脱水,5-羟甲基糠醛,磺酸
Abstract:
？通过反相微乳液法制备了以Fe3O4为核，磺酸官能化的硅基材料为壳层的磁性酸性催化剂.首先制备纳米Fe3O4磁核，然后涂层包覆苯基修饰的纳米级硅层，最后进行苯基磺化修饰，制得固体酸催化剂Fe3O4@Si/Ph-SO3H.在果糖脱水制备5-羟甲基糠醛反应中，该催化剂表现出较好的催化活性，优于传统催化剂A-15，且与均相无机酸催化活性相当.当采用二甲基亚砜作溶剂，在110℃下反应3h，果糖转化率达到99%，5-羟甲基糠醛收率为82%.另外，该催化剂经磁法回收后可多次重复使用.
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