摘要
通过混合氨基修饰碳点(N-CDs)与酞菁锌(Pc Zn)合成了静电结合的N-CDs/Pc Zn复合结构.利用荧光光谱、紫外-可见吸收光谱、循环伏安测试和光催化活性表征证实了N-CDs的光激发电子通过界面转移到了Pc Zn分子上,然后在Pc Zn上发生辐射复合,导致Pc Zn的荧光发射增强.由于N-CDs上的激发电子转移到了Pc Zn分子上,促使了其与空穴的分离,阻碍了N-CDs上的辐射复合发生,因此提高了N-CDs/Pc Zn复合体系的光催化活性.反应温度会影响N-CDs/Pc Zn复合体系的稳定性和光转换能力,在常温下制备的N-CDs/Pc Zn复合结构具有最佳的光物理与化学性能.
Amine-functionalized carbon dots（ N-CDs） and zinc phthalocyaine（ Pc Zn） were combined by electrostatic bonding under the mechanical stirring,resulting in a new composite,i.e. N-CDs / Pc Zn. The photoinduced excited electron transfer via the interface between N-CDs and Pc Zn was determined through fluorescence spectra,UV-Vis absorption spectra,infrared spectra and cyclic voltammetry. The excited electrons of N-CDS were transfered onto the Pc Zn molecules and then relaxed by radiative recombination,causing the enhanced fluorescence emission of Pc Zn. On the other hand,the separation of electron-hole pair on N-CDs was realized and thus limited the possibility of radiative combination on N-CDs. Therefore,the composite of N-CDs / Pc Zn showed a high photocatalytic activity. Moreover,the stability and the photon conversion ability of N-CDs / Pc Zn composites depended on the reaction temperature. The experimental results suggest that room temperature is the optimum to obtain composite with good performance.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2015年第4期619-624,共6页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:51172214)
山西省优秀青年科学基金(批准号:2014021008)资助~~
关键词
碳点
酞菁锌
电子转移
荧光性能
光催化性能
Carbon dots
Zinc phthalocyaine
Electronic transfer
Fluorescent property
Photocatalytic property
