The adsorption of reactants is highly correlated with photocatalysis. Improving the adsorption ability of photocatalyst may realize highly efficient removal performance. In this work, Bi₂MoO₆ and bamboo-derived biochar composite was developed by a facile ball milling method. The adsorption and photodegradation abilities of the composites were evaluated by removing methylene blue (MB), which is a most commonly used aromatic-cationic dye. The maximum adsorption capacity of MB on the optimized 20 % Bi₂MoO₆/biochar sample was 160.6 mg/g, and the synergistic adsorption-photocatalytic removal efficiency of MB reached 93.3 % within 30 min, which were superior to Bi₂MoO₆ (13.3 mg/g, 31.6 %) and biochar (127.7 mg/g, 69.8 %). Compared to Bi₂MoO₆, the Bi₂MoO₆/biochar composites showed decreased bandgap and enhanced charge separation efficiency. The strong interfacial interactions between Bi₂MoO₆ and biochar in composites facilitated the photo-induced electrons transfer. Furthermore, the photodegradation efficiency enhanced along with the adsorption efficiency while pH value increased, which further proves the synergy between adsorption and photodegradation. Noticeably, the 20 % Bi₂MoO₆/biochar can completely remove MB at pH between 3 and 11. This work proves Bi₂MoO₆ modified biochar prepared by ball milling is a promising material for synergistic adsorption and photodegradation removal of organic pollutants.

反应物的吸附与光催化高度相关。提高光催化剂的吸附能力可以实现高效的去除性能。在这项工作中，Bi ₂ MoO ₆和竹衍生的生物炭复合材料是通过一种简便的球磨方法开发的。通过去除最常用的芳香族阳离子染料亚甲蓝 (MB) 来评估复合材料的吸附和光降解能力。MB对优化后的20% Bi ₂ MoO ₆ /生物炭样品的最大吸附量为160.6 mg/g，30 min内MB的协同吸附-光催化去除效率达到93.3%，优于Bi ₂ MoO ₆(13.3 mg/g, 31.6 %) 和 biochar (127.7 mg/g, 69.8 %)。与Bi ₂ MoO ₆相比， Bi ₂ MoO ₆ /生物炭复合材料的带隙减小，电荷分离效率提高。_{复合材料中Bi 2} MoO ₆和生物炭之间的强界面相互作用促进了光致电子转移。此外，随着pH值的增加，光降解效率随着吸附效率的提高而提高，这进一步证明了吸附和光降解之间的协同作用。值得注意的是，20% Bi ₂ MoO ₆ /biochar 在 pH 值介于 3 和 11 之间时可以完全去除 MB。这项工作证明了 Bi ₂ MoO球磨制备的_{6改性生物炭是一种很有前景的协同吸附和光降解去除有机污染物的材料。}