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Fabrication of SnO2/SnS2 hybrids by anchoring ultrafine SnO2 nanocrystals on SnS2 nanosheets and their photocatalytic properties

机译:通过将超细SnO2纳米晶体锚定在SnS2纳米片上来制备SnO2 / SnS2杂化物及其光催化性能

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Ultrafine SnO2 nanocrystals with sizes of 4 nm have been successfully loaded on the SnS2 nanosheets to fabricate SnO2/SnS2 hybrids via a facile hydrothermal method. The obtained samples are well characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), UV vis spectroscopy, photoluminence (PL) and electrochemical impedance spectroscopy (EIS). The experimental results indicate that the SnO2 nanocrystals of similar to 4 nm are well dispersed and intimately anchored on the SnS2 nanosheets to form nanosized heterojunctions, which can be favorable to the separation of photo-generated holes and electrons. Consequently, the SnO2/SnS2 hybrids demonstrate obviously enhanced photocatalytic activities for reduction of Cr (VI) under visible light compared with both the bare SnO2 and SnS2. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
机译:已经成功地将大小为4 nm的超细SnO2纳米晶体装载到SnS2纳米片上,以方便的水热方法制造SnO2 / SnS2杂化物。获得的样品通过X射线衍射(XRD),扫描电子显微镜(SEM),高分辨率透射电子显微镜(HRTEM),X射线光电子能谱(XPS),紫外可见光谱,光致发光(PL)和电化学进行了很好的表征阻抗谱(EIS)。实验结果表明,相似的4nm的SnO2纳米晶体良好地分散并紧密地锚定在SnS2纳米片上,形成纳米尺寸的异质结,这有利于光生空穴和电子的分离。因此,与裸露的SnO2和SnS2相比,SnO2 / SnS2杂化物在可见光下均表现出明显增强的光催化活性,以减少Cr(VI)。 (C)2015 Elsevier Ltd和Techna Group S.r.l.版权所有。

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