Porous SnIn4S8 microspheres in a new polymorph that promotes dyes degradation under visible light irradiation.
Porous SnIn4S8 microspheres in a new polymorph that promotes dyes degradation under visible light irradiation.
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DOI：
10.1016/j.jhazmat.2010.10.114
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发表时间：
2011-02
影响因子：
13.6
通讯作者：
T. Yan;Liping Li;Guangshe Li;Yunjian Wang;Wanbiao Hu;X. Guan
中科院分区：
文献类型：
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作者：
T. Yan;Liping Li;Guangshe Li;Yunjian Wang;Wanbiao Hu;X. Guan
采用溶剂热法制备了SnIn 4S 8多孔微球，并将其作为可见光催化剂用于染料废水的降解。采用XRD、SEM、TEM、N2吸附-脱附、紫外-可见漫反射等手段对催化剂进行了表征。结果表明，合成的SnIn 4S 8为一种新的四方晶型，其禁带宽度为2.5eV，比表面积为197 m2 g-1，具有多孔结构。以橙子、罗丹明B和亚甲基蓝等典型有机染料为目标染料，研究了多孔SnIn 4S 8的可见光催化活性。结果表明，多孔SnIn 4S 8具有较高的光催化活性和稳定性，其光催化活性远高于二元硫化物In 2S 3、SnS 2，甚至三元硫属化合物ZnIn 2S 4。多孔SnIn 4S 8的优异光催化性能是由于其高的比表面积、清晰的多孔结构和大量的羟基自由基。
Porous SnIn4S8microspheres were initially synthesized through a facile solvothermal approach and were investigated as visible-light driven photocatalysts for dyes degradation in polluted water. The photocatalysts were characterized by XRD, SEM, TEM, N2adsorption–desorption, and UV–vis diffuse reflectance techniques. Results demonstrated that the as-synthesized SnIn4S8was of a new tetragonal polymorph, showing a band-gap of 2.5eV, a specific surface area of 197m2g−1, and an accessible porous structure as well. The photocatalytic activity of the porous SnIn4S8was evaluated by decomposition of several typical organic dyes including methyl orange, rhodamine B, and methylene blue in aqueous solution under visible light irradiation. It is demonstrated that porous SnIn4S8was highly photoactive and stable for dyes degradation, showing photocatalytic activity much higher than binary constituent sulfides like In2S3, SnS2, or even ternary chalcogenide ZnIn2S4photocatalyst. The excellent photocatalytic performance of porous SnIn4S8is the consequence of its high surface area, well-defined porous texture, and large amount of hydroxyl radicals.