Yu Jing, Xu Cheng-Yan, Ma Fei-Xiang, Hu Sheng-Peng, Zhang Yu-Wei, Zhen Liang
School of Materials Science and Engineering, Harbin Institute of Technology , Harbin 150001, People's Republic of China.
ACS Appl Mater Interfaces. 2014 Dec 24;6(24):22370-7. doi: 10.1021/am506396z. Epub 2014 Dec 5.
Graphene-like two-dimensional layered materials have attracted quite a lot of interest because of their sizable band gaps and potential applications. In this work, monodisperse tin disulfide (SnS2) nanosheets were successfully prepared by a simple solvothermal procedure in the presence of polyvinylpyrrolidone (PVP). Large PVP molecules absorbing on (001) facets of SnS2 would inhibit crystal growth along [001] orientation and protect the product from agglomeration. The obtained SnS2 nanosheets have diameters of ca. 0.8-1 μm and thicknesses of ca. 22 nm. Different experiment parameters were carried out to investigate the transformation of phase and morphology. The formation mechanism was proposed according to the time-dependent experiments. SnS2 nanosheets exhibit high photocatalytic H2 evolution activity of 1.06 mmol h(-1) g(-1) under simulated sunlight irradiation, much higher than that of SnS2 with different morphologies and P25-TiO2. Moreover, the as-obtained SnS2 nanosheets show excellent photoelectrochemical response performance in visible-light region.
类石墨烯二维层状材料因其可观的带隙和潜在应用而备受关注。在本工作中，通过在聚乙烯吡咯烷酮（PVP）存在下的简单溶剂热法成功制备了单分散的二硫化锡（SnS2）纳米片。吸附在SnS2（001）晶面上的大尺寸PVP分子会抑制晶体沿[001]方向生长，并防止产物团聚。所制备的SnS2纳米片直径约为0.8 - 1μm，厚度约为22nm。通过改变不同实验参数来研究相和形貌的转变。根据时间相关实验提出了形成机理。SnS2纳米片在模拟太阳光照射下表现出1.06 mmol h(-1) g(-1)的高光催化析氢活性，远高于具有不同形貌的SnS2和P25 - TiO2。此外，所制备的SnS2纳米片在可见光区域表现出优异的光电化学响应性能。
