Citation: FENG Chang, DENG Xiao-Yan, NI Xiao-Xiao, LI Wei-Bing. Fabrication of Carbon Dots Modified Porous ZnO Nanorods with Enhanced Photocatalytic Activity[J]. Acta Physico-Chimica Sinica, ;2015, 31(12): 2349-2357. doi: 10.3866/PKU.WHXB201510281 shu

Fabrication of Carbon Dots Modified Porous ZnO Nanorods with Enhanced Photocatalytic Activity

1.
1 School of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong Province, P. R. China;
2.
2 Qingdao Municipal Drainage Monitoring Center, Qingdao 266002, Shandong Province, P. R. China

Corresponding author: DENG Xiao-Yan,
Received Date: 7 August 2015
Available Online: 27 October 2015
Fund Project: 国家自然科学基金(41376126) (41376126)

Porous ZnO nanorods that displayed excellent photocatalytic degradation of organic pollutants (RhB and phenol) were prepared via a solvent thermal method followed by surface modification with carbon dots (C-dots) using a deposition method. The photocatalysts were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and ultraviolet-visible (UV-Vis) spectroscopy. The degradation of the organic pollutants using the nanorods was tested under Xe-light illumination and was enhanced following C-dot modification. Nanorods that were modified by the C-dots at a mass fraction of 1.2% (CZn1.2) exhibited the highest photocatalytic activity for the degradation of RhB, which was 2.5 times of the pure porous ZnO nanorods. Additionally, the modified nanorods with strangely oxidation ability could catalyze the degradation of phenol by open-rings reaction under Xe-light illumination. The improved photocatalytic activity was attributed to the effective separation of the photogenerated electrons and holes, in which the C-dots served as the receptor of the photogenerated electrons.
- Semiconductor photocatalysis,
- ZnO,
- C-dots,
- Degradation of organic pollutants,
- Modified photocatalyst
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