Preparation of novel silicon/nitrogen-doped graphene composite nanosheets by DC arc discharge. Issue 37 (25th March 2015)

• Record Type: Journal Article
• Authors: Shah, Sayyar Ali; Cui, Lan; Lin, Kui; Xue, Tao; Guo, Qianjin; Li, Ling; Zhang, Lishuang; Zhang, Fan; Hu, Fengxiang; Wang, Xitao; Wang, Hui; Chen, Xiaoping; Cui, Shen
• Is Part Of: RSC advances. Volume 5:Issue 37(2015)
• Page Start: 29230
• Page End: 29237
• Publication Date: 2015-03-25
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra01858g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Silicon/nitrogen-doped graphene composite nanosheets were prepared by DC arc discharge and their suspensions emitted green luminescence under irradiation of UV light. Abstract : Silicon/graphene nanocomposites (Si/GNCs) are one of the promising candidates for the increasing demands of portable electronic devices and electric vehicle applications. However, two-dimensional (2D) Si phase component in Si/GNCs was rarely reported. In this work, we present the preparation of Si/nitrogen-doped graphene composite nanosheets (Si/NDGCNSs) by DC arc discharge under nitrogen of 800 °C, using an anode with comparatively high Si content and good homogeneity. 2D Si nanostructures were observed in the Si/NDGCNSs. The phase composition of the Si/NDGCNSs includes graphitic carbon, Si and silicon carbide (SiC). The suspensions of the Si/NDGCNSs in distilled water and ethanol were stable for more than one and two months respectively, and both of them emitted green luminescence under irradiation of UV light. Their UV-vis spectra show two absorption peaks. The formation mechanism of the Si/NDGCNSs is discussed briefly. The as-prepared Si/NDGCNSs may be used for photocatalysts, solar cells and energy storage devices, etc.