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不含金属的二维石墨相氮化碳纳米片由于具有优异的催化、光学及电学性能而受到研究者的广泛关注.然而制备纳米级尺寸的单层石墨相氮化碳纳米片仍然存在挑战.本文采用一种高效超声方法制备了横向尺寸约为55 nm,厚度约为0.6 nm的单层石墨相氮化碳纳米片(NMGCNs).由于其纳米级尺寸及单层片状结构,NMGCNs表现出与大尺寸纳米片和量子点显著不同的光响应特性.NMGCNs的水分散溶液具有良好的稳定性能和优异的荧光性能,荧光量子产率可达32%,所以可用于细胞荧光成像.此外,NMGCNs表现出比多层石墨相氮化碳纳米片更优异的可见光催化性能.独特的小尺寸及单层超薄结构使得NMGCNs在传感器和光电子等领域都具有潜在应用前景.
Metal-free, two-dimensional graphitic carbon nitride carbon nanosheets have attracted the attention of researchers due to their excellent catalytic, optical and electrical properties, however, there are still some challenges in the preparation of single-walled graphite carbon nitride nanosheets with nanoscale dimensions. In this paper, a single-walled graphite carbonitride carbon nanosheets (NMGCNs) with lateral size of about 55 nm and thickness of about 0.6 nm were prepared by an efficient ultrasonic method. Due to their nanometer size and single-layer lamellar structure, NMGCNs showed With the large size of nanosheets and quantum dots significantly different photoresponse characteristics.NGGCNs aqueous dispersion solution with good stability and excellent fluorescence properties, fluorescence quantum yield of up to 32%, it can be used for fluorescence imaging of cells.In addition, NMGCNs Showing more excellent photocatalytic activity than multilayer graphite carbon nitride carbon nanosheets.Unique small size and single layer ultrathin structure make NMGCNs have potential applications in the fields of sensors and optoelectronics.