Table_1_Ultrathin-Layer Structure of BiOI Microspheres Decorated on N-Doped Biochar With Efficient Photocatalytic Activity.XLSX

Bismuth oxyiodide (BiOI) is among the most potential photocatalysts due to its photocatalytic activity under visible light irradiation. However, the photoinduced carrier separation efficiency has limited the BiOI photocatalytic activity. Herein, we utilized the direct carbonation of sapless cattail grass to obtain N-doped hierarchical structure cattail-based carbon (NCC). The NCC not only served as an appropriate host but also as a self-sacrificing template for BiOI microspheres for the preparation of BiOI/NCC composite material. The acidic solutions (HCl or AcOH) were used as a solvent which helped to obtain a well-defined micro/nano hierarchical BiOI microspheres composed of ultrathin nanosheets. Thus, BiOI/NCC composites were successfully designed through the in-situ self-template rapid dissolution-recrystallization mechanism. Additionally, numerous well-contacted interfaces were formed between NCC and BiOI, which served as an electron-acceptor bridge function for ultrafast electron transfer process in order to hinder the electron-hole pairs recombination. On account of the multiple synergistic effects of micro/nano hierarchical microsphere structure, ultrathin nanosheets, and well-contacted interface, the as-prepared BiOI/NCC composites exhibit the superior degradation of rhodamine B (RhB) than pure BiOI under visible light irradiation.

氧化铋碘（BiOI）因其可见光照射下的光催化活性而成为最具潜力的光催化剂之一。然而，光诱导载流子分离效率的限制制约了BiOI的光催化活性。本研究中，我们利用无汁芦苇的直接碳化法制备了N掺杂的分级结构芦苇基碳（NCC）。NCC不仅充当了合适的宿主，而且还作为BiOI微球的牺牲性模板，用于制备BiOI/NCC复合材料。酸性溶液（HCl或AcOH）作为溶剂，有助于获得由超薄纳米片组成的定义明确的微/纳米分级BiOI微球。因此，通过原位自模板快速溶解-结晶机制成功设计了BiOI/NCC复合材料。此外，在NCC和BiOI之间形成了众多紧密接触的界面，这些界面作为超快电子转移过程的电子受体桥，以阻止电子-空穴对的复合。由于微/纳米分级微球结构、超薄纳米片和紧密接触界面的多重协同效应，所制备的BiOI/NCC复合材料在可见光照射下对罗丹明B（RhB）的降解性能优于纯BiOI。