In this work, silver nanoparticles/graphene oxide nanoscroll composites (AgNPs/GO nanoscroll composites) with open-ended nanoscroll structures were synthesized as a recyclable photocatalyst. The open-ended nanoscroll structures provide sufficient space to prevent the AgNPs from oxidizing and aggregating, and the $\pi$-$\pi$ continuous surface provides an abundance of pathways for AgNPs transfer during photodegradation. To demonstrate the recyclability of the synthesized photocatalytic composites, methylene blue aqueous solution was photodegraded under optimal conditions over ten consecutive photocatalytic cycles. The result shows that the AgNPs/GO nanoscroll composites are able to mineralize methylene blue to colorless within 10 min in each cycle, and no decomposition was detected after ten cycles. The AgNPs/GO nanoscroll composites could be used as a recyclable photocatalyst in wastewater treatment applications.

在这项工作中，具有开放式纳米卷结构的银纳米颗粒/氧化石墨烯纳米卷复合物（AgNPs / GO纳米卷复合物）被合成为可回收的光催化剂。开放式纳米滚动结构提供了足够的空间来防止AgNP氧化和聚集，并且$\pi$--$\pi$连续表面为光降解过程中的AgNPs传递提供了丰富的途径。为了证明合成的光催化复合材料的可循环利用性，在十个连续的光催化循环中，在最佳条件下对亚甲基蓝水溶液进行了光降解。结果表明，AgNPs / GO纳米卷复合物能够在每个循环中在10分钟内将亚甲基蓝矿化为无色，并且在十个循环后未检测到分解。AgNPs / GO纳米卷复合材料可用作废水处理应用中的可回收光催化剂。