title: An efficient top-down approach for the fabrication of large-aspect-ratio g-C3N4 nanosheets with enhanced photocatalytic activities.
abstract: Graphitic carbon nitride (g-C3N4) nanosheets with large aspect ratios were fabricated from bulk g-C3N4 through an efficient top-down approach of moderate disintegration-exfoliation using diluted H2SO4 as an "efficient knife". By prior disintegration in a diluted H2SO4 solution, the exfoliation of bulk g-C3N4 was effectively accelerated. The as-prepared g-C3N4 nanosheets possess a two-dimensional (2D) thin-layer structure with seven-atom thickness, a large lateral size of about 1 μm, and a high specific surface area of 80 m(2) g(-1). Compared with the bulk precursor, the g-C3N4 nanosheets showed much higher efficiency of photogenerated charge transfer and separation, and consequently exhibited enhanced photocatalytic activity toward hydrogen evolution and pollutant decomposition under both full-sunlight and visible-light irradiation.
authors: School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450052, China. lizhang9@zzu.edu.cn caoshaokui@zzu.edu.cn.
authors: Jincheng
authors: J
authors: Tong
authors: Li
authors: L
authors: Zhang
authors: Fei
authors: F
authors: Li
authors: Mingming
authors: M
authors: Li
authors: Shaokui
authors: S
authors: Cao