Oxygen-rich carbon-nitrogen quantum dots as cocatalysts for enhanced photocatalytic H2 production activity of TiO2 nanofibers

Progress in Natural Science: Materials International

Lihua He¹  Zhiyong Wang¹  Yongpeng Lei²  Zhongmin Wang³  Zhiyan Chen⁴  Yishang Wu⁴  Qichen Wang⁴ 

[1] AVIC Beijing Institute of Aeronautical Materials, Beijing 100095, China;College of Basic Education, National University of Defense Technology, Changsha 410073, China;Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China;School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China;

关键词: Photocatalytic H2 production;    TiO2;    Nanofibers;    Quantum dots;   

DOI  :  10.1016/j.pnsc.2017.04.011

来源: DOAJ

【 摘 要 】

We developed an one-step hydrothermal method to synthesize carbon-nitrogen quantum dots (CNQDs) with oxygen-rich functional groups. The sample was characterized by TEM, AFM, FT-IR, XPS, UV–vis absorption and PL spectra. The O/C and N/C atomic ratio of typical CNQDs with diameters of 3–6 nm are ca. 0.4 and 0.2, respectively. Without noble metal cocatalyst, the photocatalytic H2 production rate of CNQDs/TiO2 nanofibers (NFs) (112.4 μmol h−1 g−1) is 1.8 times higher than that of TiO2 NFs. The good absorption of light contributes to the enhanced photocatalytic H2 performance. The CNQDs could be promising in biomedical imaging, optical data recording storage and photo/electrocatalysis, etc.

【 授权许可】

Unknown