Surfactant with amphiphilic substance has a vital impact on the synthesis of photocatalysts, which can affect surface property and morphology of materials. Herein, we proposed a Triton X-100 (TX-100)–assisted method for the synthesis of layered BiOBr nanosheet–assembled flower-like nanostructures. It was found that the TX-100 played a key role on the morphology and photocatalytic performance of the product. The prepared multilayered BiOBr nanosheet–assembled flower-like nanostructures exhibited larger specific surface area, broadened light absorption, and enhanced separation rate of photo-generated electrons and holes. The adsorption and photocatalytic degradation properties of ciprofloxacin (CIP) by our prepared BiOBr were investigated, and the results indicated that BiOBr assisted with 7 mL TX-100 exhibited higher adsorption ability and enhanced photocatalytic activity with 94.0% of ciprofloxacin degradation rate within 180 min. Superoxide radicals (·O₂⁻) and holes (h⁺) were confirmed to be the two main reactive species for the degradation of ciprofloxacin. This work provides a novel surfactant-assisted method for the synthesis of layered nanosheet-assembled flower-like nanostructures, which would have potential applications in the photocatalytic field.

Graphical abstract

The illustration of the photocatalytic degradation mechanism for ciprofloxacin under visible light.

中文翻译：

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Triton X-100 辅助合成层状纳米片组装的花状 BiOBr 纳米结构，增强可见光光催化降解环丙沙星

具有两亲性物质的表面活性剂对光催化剂的合成具有至关重要的影响，会影响材料的表面性质和形貌。在此，我们提出了一种 Triton X-100 (TX-100) 辅助方法来合成层状 BiOBr 纳米片组装的花状纳米结构。发现TX-100对产物的形貌和光催化性能起关键作用。制备的多层BiOBr纳米片组装的花状纳米结构表现出更大的比表面积、更宽的光吸收和更高的光生电子和空穴分离率。研究了我们制备的 BiOBr 对环丙沙星 (CIP) 的吸附和光催化降解性能，结果表明，BiOBr在7 mL TX-100的辅助下表现出更高的吸附能力和增强的光催化活性，180 min内环丙沙星的降解率为94.0%。超氧自由基（· O ₂ ^- ) 和空穴(h ⁺ ) 被证实是环丙沙星降解的两个主要反应物。这项工作为合成层状纳米片组装的花状纳米结构提供了一种新的表面活性剂辅助方法，在光催化领域具有潜在的应用价值。

图形概要

可见光下环丙沙星光催化降解机理示意图。