Citation: ZHANG Yun-Long, ZHANG Yu-Zhi, SONG Li-Xin, GUO Yun-Feng, WU Ling-Nan, ZHANG Tao. Synthesis and Photocatalytic Performance of Ink Slab-Like ZnO/Graphene Composites[J]. Acta Physico-Chimica Sinica, ;2017, 33(11): 2284-2292. doi: 10.3866/PKU.WHXB201705184 shu

Synthesis and Photocatalytic Performance of Ink Slab-Like ZnO/Graphene Composites

1.
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, P. R. China;
2.
University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Received Date: 20 March 2017
Revised Date: 10 May 2017

A special ZnO/graphene composite with an ink slab-like shape was synthesized by a facile one-step solution method. The morphology of the ink slab-like ZnO/graphene composites produced under different reaction conditions was studied by scanning electron microscopy (SEM), field emission SEM (FESEM), and high resolution transmission electron microscopy (HRTEM). The photocatalytic properties of the products obtained under different reaction conditions were evaluated to determine the effect of reaction conditions and morphology. Photoluminescence (PL) and UV-visible spectra were measured to study the recombination of electron-hole pairs and absorption of UV-visible light. The results showed that the growth process of the ink slab-like ZnO involves the ‘corrosion mechanism’. The combination of graphene greatly enhanced the photocatalytic performance by enhancing light absorption, decreasing the band gap, and reducing the recombination probability of electron-hole pairs. Moreover, the bottom of the ink slab-like ZnO with a rough surface can greatly increase the reaction area. The extremely thin bottom of the ink slab offers a considerable build-in internal electric field that accelerates the separation of electron-hole pairs, thus decreasing the recombination probability and enhancing the photocatalytic performance.
- Ink slab-like ZnO,
- Graphene,
- Composite,
- Photocatalytic degradation,
- Methylene blue
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1.
沈阳化工大学材料科学与工程学院沈阳 110142