This work presents the development of a new hybrid material composed of metal-organic-framework, MIL-101 (Cr) and mesoporous tin phosphate nanoparticles. The phosphate groups of the composite impart Brønsted acidity, while the Cr and Sn atoms act as the Lewis acid sites, thus promoting it as a dual acid functionalized material suitable for solid acid catalysis of biomass. Simultaneously, the issues of hydrothermal stability and degradation in acidic medium as faced by pristine MIL-101 (Cr), have been fairly alleviated. In order to demonstrate our claims, the composite has been used as a solid acid catalyst for the dehydration of xylose to furfural. A remarkable performance of 86.7% furfural yield with 92.3% selectivity has been achieved in 180 min at 150 °C. The composite can sustain minimum of 10 cycles of run while pristine MIL-101 (Cr) loses its functional properties after 4 cycles of run. In presence of 35 ppt NaCl solution, the yield and selectivity improved to 92.4% and 96.6% respectively.

这项工作提出了一种新的混合材料的开发，该混合材料由金属有机框架，MIL-101（Cr）和中孔磷酸锡纳米颗粒组成。复合材料的磷酸基团赋予布朗斯台德酸度，而Cr和Sn原子充当路易斯酸位点，从而促进了它成为适用于固体酸催化生物质的双重酸官能化材料。同时，原始MIL-101（Cr）所面临的水热稳定性和在酸性介质中降解的问题已得到相当大的缓解。为了证明我们的权利要求，该复合物已被用作用于木糖脱水成糠醛的固体酸催化剂。在150°C的180分钟内，糠醛的收率为86.7％，选择性为92.3％，具有非凡的性能。该复合材料可以至少维持10个循环运行，而原始MIL-101（Cr）在4个循环运行后会失去其功能特性。在35 ppt NaCl溶液中，收率和选择性分别提高到92.4％和96.6％。