This work presents the catalytic valorization agricultural waste into levulinic acid over Mo-doped carbon microspheres (MoCMP) in γ-valerolactone/water solvents. The MoCMP with Brønsted and Lewis acid were synthesized by hydrothermal carbonization of uncrystallized cellulose with phosphomolybdic acid in one step, which was in absence of any additional modification. The MoCMP catalyst displayed a peak levulinic acid yield of 33.02% at 195 ℃ for 90 min. The improvement of Lewis acid sites was related by the Mo₂C and Mo⁶⁺ species to promote the isomerization of glucose to fructose. The enhanced strong Brønsted acid sites were generated by carboxyl groups to facilitate the glucose dehydration to levulinic acid. MoCMP provided a high catalytic efficiency for production of LA from corncob. A simple and green method was proposed to synthesize Mo-doped carbon microspheres for valorization of agricultural biomass into valuable chemicals.

这项工作展示了在 γ-戊内酯/水溶剂中的 Mo 掺杂碳微球 (MoCMP) 上将农业废弃物催化增值为乙酰丙酸。具有布朗斯台德和路易斯酸的 MoCMP 是通过未结晶纤维素与磷钼酸的水热碳化一步合成的，该步骤没有任何额外的修饰。MoCMP 催化剂在 195 ℃ 90 分钟时显示出 33.02% 的峰值乙酰丙酸产率。路易斯酸位点的改善与 Mo ₂ C 和 Mo ^6+有关促进葡萄糖异构化为果糖的物质。增强的强布朗斯台德酸位点由羧基产生，以促进葡萄糖脱水为乙酰丙酸。MoCMP 为从玉米芯生产 LA 提供了高催化效率。提出了一种简单且绿色的方法来合成钼掺杂的碳微球，用于将农业生物质转化为有价值的化学品。