Citation: LIU Su-Qin, WANG Song, DAI Gao-Peng, LU Jun, LIU Ke. Enhanced Visible-Light Photocatalytic Activity and Stability of Nano-Sized Ag₂CO₃ Combined with Carbon Nanotubes[J]. Acta Physico-Chimica Sinica, ;2014, 30(11): 2121-2126. doi: 10.3866/PKU.WHXB201409191 shu

Enhanced Visible-Light Photocatalytic Activity and Stability of Nano-Sized Ag₂CO₃ Combined with Carbon Nanotubes

LIU Su-Qin ^1,2 ,
WANG Song ¹ ,
DAI Gao-Peng ^1,2, ,
LU Jun ¹ ,
LIU Ke ²

1.
1. Department of Chemical Engineering and Food Science, Hubei University of Arts and Science, Xiangyang 441053, Hubei Province, P. R. China;
2. Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Xiangyang 441053, Hubei Province, P. R. China

Received Date: 17 June 2014
Available Online: 19 September 2014
Fund Project: 国家自然科学基金(51378183) (51378183) 湖北省自然科学基金(2012FFB1903) (2012FFB1903) 湖北省教育厅项目(Q20132608) (Q20132608) 襄阳市科技局项目及湖北省低维光电材料与器件重点实验室开放基金(13XKL02013)资助 (13XKL02013)

Nano-sized Ag₂CO₃ and carbon nanotube (CNT) composites were fabricated by a facile chemical precipitation approach in N,N-dimethylformamide (DMF) solvent. The as-prepared Ag₂CO₃/CNT samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and ultra violet-visible (UV-Vis) diffuse reflectance spectroscopy (DRS). The photocatalytic activity of the samples was evaluated by photocatalytic degradation of methyl orange (MO) under visible light irradiation. The results showed that the nano-sizedAg₂CO₃ particles and CNTs were well combined. The Ag₂CO₃/CNT composite with CNT content of 1.5%(w) exhibited optimal photocatalytic activity under visible light. Ninetythree percent of the MO was removed by the Ag₂CO₃/CNT composite within 60 min. For the Ag₂CO₃/CNT composites, we found that the incorporation of CNT improved the structural stability of Ag₂CO₃ compared with Ag₂CO₃. After three cycles, 81% of the MO was decomposed by the Ag₂CO₃/CNT composite with CNT content of 1.5% (w), but only 59.5% of the MO could be removed by Ag₂CO₃. The improvements in the activity and stability are attributed to the conductive structure supported by CNTs, which favors electron-hole separation and the removal of photogenerated electrons from the decorated Ag₂CO₃.
- Ag₂CO₃/CNT composite,
- Photocatalysis,
- Visible light,
- Stability
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Enhanced Visible-Light Photocatalytic Activity and Stability of Nano-Sized Ag₂CO₃ Combined with Carbon Nanotubes