Even though lignin is very rich in aromatic compounds, it remains the least exploited fraction of biomass due to its recalcitrant nature. Consequently, prevailing efforts to fully unlock its potential are still far from reaching due to the use of harsh conditions and energy-intensive processes which are not environmentally friendly. Herein, a facile approach for coupling acid-catalyzed mechanocatalysis (MC) via ball milling with TiO₂ photocatalysis (PC)/Fenton for depolymerization of alkaline lignin was investigated. Mechanocatalysis (MC) involved prior acid impregnation (AI) followed by ball milling. A direct comparison of pretreatments (AI, BM, MC) coupled with oxidation processes was preliminarily undertaken. The untreated lignin (UL) served as the control. MC/PC showed the highest yield of major aromatic products. Vanillin, homovanillic acid, acetovanillone, guaiacol, and vanillic acid were major aromatic building blocks identified and quantified. Further optimization revealed a total monomer yield of 22.77 wt%. SEM and FTIR analysis were done with the latter revealing the existence of pre-oxidation reaction in the BM and MC lignin prior to PC. The proposed synergetic process could offer an advantage over prevailing robust systems used for lignin depolymerization.

尽管木质素富含芳香族化合物，但由于其顽固性，它仍然是生物质中开发最少的部分。因此，由于使用了不环保的恶劣条件和能源密集型工艺，目前为充分释放其潜力所做的努力仍远未实现。在此，一种通过球磨与 TiO _{2耦合酸催化机械催化 (MC) 的简便方法}研究了用于碱性木质素解聚的光催化 (PC)/Fenton。机械催化 (MC) 涉及预先酸浸渍 (AI)，然后进行球磨。初步进行了预处理（AI、BM、MC）与氧化过程的直接比较。未处理的木质素 (UL) 作为对照。MC/PC 显示出主要芳烃产品的最高收率。香草醛、高香草酸、乙酰香草酮、愈创木酚和香草酸是鉴定和定量的主要芳香成分。进一步优化显示总单体产量为 22.77 重量%。对后者进行了 SEM 和 FTIR 分析，揭示了在 PC 之前 BM 和 MC 木质素中存在预氧化反应。所提出的协同过程可以提供优于用于木质素解聚的流行的稳健系统的优势。