Dependence of photocatalytic performance on interfacial reaction in carbon dots/mesoporous hydroxyapatite nanocomposites

[摘要] Carbon dots (CDs) with N- and Cl-contained groups supported mesoporous hydroxyapatite (mHA) composites were prepared, respectively. The effect of the interfacial reaction between CDs and mHA on the photocatalytic activity was investigated. It was found that the composites exhibited different compositions and absorption properties owing to the interfacial reaction. As a consequence, while CDs with Cl-contained groups (Cl-CDs) showed the highest activity, mHA/Cl-CDs composite exhibited the lowest activity. Conversely, the composite of mHA and CDs with N-contained groups using ammonia as source (N-CDs-1) had the highest activity, although the activity of N-CDs-1 was lower that of Cl-CDs. It can be concluded that the interfacial reaction played an essential role in governing the activity of the composites. The findings were valuable in constructing CDs-based composites with excellent photocatalytic performance.

[学科分类] 计算机科学（综合）

[关键词] calcium compounds;nanoparticles;nanofabrication;carbon;mesoporous materials;nanocomposites;photocatalysis;photocatalysts;interfacial reaction;photocatalytic activity;N-CDs-1;CDs-based composites;carbon dots/mesoporous hydroxyapatite nanocomposites;C-Ca5(PO4)3(OH)