Due to its excellent catalytic performance, low production of waste and easy recyclability, heterogeneous catalysts employed for conversion of cellulose to HMF have been drawn wide attention in recent years. In this work, precipitation polymerization methodology, subsequent template remove, and the sulfonation technique are combined to synthesis hollow polymeric solid catalysts with tunable acid‐base bi‐functional sites. By simply varying the parameters of precipitation polymerization, the acid and base strengths can be easily adjusted. The catalytic performances of synthesized catalysts were evaluated for 5‐hydroxymethylfurfural (HMF) production from cellulose conversion in ionic liquid of 1‐butyl‐3‐methylimidazolium chloride ([BMIM]‐Cl). And 41.63% of HMF yield can be obtained under the optional conditions. Furthermore, catalyst can be easily recovered and reused at least five times without significant loss of activity. This research opens up a versatile method to synthesize multifunctional catalyst for excellent conversion of one‐pot cellulose to HMF.

中文翻译：

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埃洛石纳米管模板化酸基双功能中空聚合物固体，可选择性地将纤维素转化为5-羟基甲基糠醛

由于其优异的催化性能，废物的低产生和易于回收利用，近年来，用于将纤维素转化为HMF的非均相催化剂受到了广泛的关注。在这项工作中，将沉淀聚合方法，随后的模板去除和磺化技术相结合，以合成具有可调酸碱双功能位的中空聚合物固体催化剂。通过简单地改变沉淀聚合的参数，可以容易地调节酸和碱的强度。评估了合成催化剂的催化性能，用于纤维素在离子液体中的1-丁基-3-甲基咪唑鎓氯化物（[BMIM] -Cl）转化为5-羟甲基糠醛（HMF）。在可选条件下，可以获得41.63％的HMF收率。此外，催化剂可以很容易地回收并至少重复使用五次，而不会显着降低活性。这项研究开辟了一种通用的方法，可以合成多功能催化剂，从而将单罐纤维素出色地转化为HMF。