Hexagonal tin disulfide nanoplatelets: A new photocatalyst driven by solar light
Hexagonal tin disulfide nanoplatelets: A new photocatalyst driven by solar light
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DOI：
10.1039/c0ce00596g
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发表时间：
2011-01-01
期刊：
影响因子：
3.1
通讯作者：
Qian, Xuefeng
中科院分区：
文献类型：
--
作者：
Du, Weimin;Deng, Dehua;Qian, Xuefeng
以SnCl 4中心点5 H（2）O和二硫化碳（CS2）为前驱体，采用改进的溶剂热法成功合成了六方结构的单晶二硫化锡（SnS 2）纳米片。采用X射线粉末衍射（XRD）、透射电子显微镜（TEM）和高分辨透射电子显微镜（HRTEM）对产物的晶相、形貌和晶格进行了表征。结果表明，合成的SnS 2纳米片为六方结构，直径20-60 nm，厚度7-10 nm。结构和HRTEM分析表明，六方晶系SnS 2纳米片的形成是由于六个能量等效的高折射率{110}晶面的加速生长和{001}晶面的延迟生长的结果。以罗丹明B（RhB）为模拟污染物，进一步研究了六方SnS 2纳米片在太阳光驱动下的光催化降解性能。结果表明，SnS 2纳米片对罗丹明B具有良好的光催化降解性能，太阳光照射70 min，脱色率可达97.7%。六方SnS 2纳米片具有良好的光催化性能，是一种很有前途的太阳光驱动光催化剂，在废水处理和环境保护方面具有潜在的应用前景。
Single-crystalline, hexagonal tin disulfide (SnS2) nanoplatelets were successfully synthesized through an improved solvothermal process with SnCl4 center dot 5H(2)O and carbon disulfide (CS2) as precursors. The crystal phase, morphology, and crystal lattice of the prepared products were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM), respectively. Results reveal that the synthesized SnS2 nanoplatelets are in the hexagonal structure with 20-60 nm in diameter and 7-10 nm in thickness. The structural and HRTEM analysis indicates that the formation of SnS2 nanoplatelets with hexagonal morphology result from the accelerating growth of six energetically equivalent high-index crystalline planes {110} and the retarded growth of {001} crystalline planes. The photocatalytic degradation properties of hexagonal SnS2 nanoplatelets driven by solar light were further investigated with Rhodamine B (RhB) as simulating pollutant. Results show that these SnS2 nanoplatelets have a good performance of photocatalytic degradation on RhB, and the decolorizing rate can reach 97.7% after being irradiated for 70 min by solar light. Better photocatalytic properties indicate that hexagonal SnS2 nanoplatelets are a type of promising photocatalyst driven by solar light and have potentially applied prospects in wastewater treatment and environmental protection.