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| 银量子点修饰的氮化碳及其光解水产氢性能研究 |
| Study on carbon nitride modified by silver quantum dots for photocatalytic hydrogen evolution |
| Received:December 09, 2020 |
| DOI： |
| 中文关键词: 氮化碳 银量子点 光催化 分解水 产氢 |
| 英文关键词: carbon nitride silver quantum dots photocatalysis water splitting hydrogen evolution |
| 基金项目:江苏省自然科学基金(BK20170310) |
| Author Name | Affiliation | | ZHANG Hui | School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, Jiangsu, China | | YANG Qing | School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, Jiangsu, China | | CAO Yu-qi | School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, Jiangsu, China | | LI Zong-lin | School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, Jiangsu, China | | YANG Zhen | School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, Jiangsu, China | | CAO Xin | School of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, Jiangsu, China |
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| 中文摘要: |
| 将尿素与乙酸银的混合物进行一步煅烧，得到了纳米尺度的银量子点(Ag QDs)修饰的氮化碳。用X射线衍射(XRD)、能谱(EDS)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)表征所得产物。结果表明，在CN100样品中，Ag QDs的大小约为5~7 nm，高度分散在氮化碳纳米片上。在光催化的过程中，Ag QDs不仅作为产氢助催化剂，而且能够快速捕获光生电子，从而显著提升体系的电荷传递和分离效率。产物CN100的光催化分解水产氢速率达到了215 μmol h-1 g-1，约为纯氮化碳的60倍。 |
| 英文摘要: |
| Carbon nitride modified by nano-sized silver quantum dots (Ag QDs) photocatalysts were prepared by a one-step calcination method using a mixture of urea and silver acetate. The as-prepared samples were characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). For the obtained CN100 sample, the size of Ag QDs was 5~7 nm and they dispersed on the carbon nitride nanosheets well. In the photocatalysis process, Ag QDs not only act as H2 evolution promoter, but also quickly capture photogenerated electrons, thereby significantly improving the charge transfer and separation efficiency of the system. The photocatalytic H2 evolution rate of CN100 was up to 215 μmol h-1 g-1, which is about 60 times that of pristine carbon nitride. |
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