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首页> 外文期刊>Applied Surface Science >Fabrication of hydrophilic S/In2O3 core-shell nanocomposite for enhancement of photocatalytic performance under visible light irradiation
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Fabrication of hydrophilic S/In2O3 core-shell nanocomposite for enhancement of photocatalytic performance under visible light irradiation

机译：亲水性S / In2O3核壳纳米复合材料的制备以增强可见光照射下的光催化性能

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Recently, elemental semiconductors as new photocatalysts excited by visible light have attracted great attention due to their potential applications for environmental remediation and clean energy generation. However, it is still a challenge to fabricate elemental photocatalysts with high activity and stability. In this paper, a straightforward ball-milling method was carried out to fabricate core-shell S/In2O3 nanocomposite photocatalyst with high performance. The photocatalyst was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS), Brunauer-Emmett-Teller (BET) method, photoluminescence spectra (PL) and super-hydrophilic experiment. The results showed that In2O3 nanoparticles were successfully grown round of S blocks and formed core-shell heterostructures. The 10% S/In2O3 core-shell nanocomposite exhibited the highest photocatalytic activity for degradation of rhodamine B (RhB) under visible light irradiation. The reaction rate constant (k) of the 10% S/In2O3 core-shell nanocomposite is about 8.7 times as high as the sum of pure In2O3 and S because of the formation of core-shell S/In2O3 heterostructures, which might remedy the drawbacks of poor hydrophilicity of S, enhance visible light absorption and separate the photogenerated carriers efficiently. Furthermore, the mechanism of influence on the photocatalytic activity of the S/In2O3 core-shell nanocomposite was also discussed. It is anticipated that our work may open up a new direction for the fabrication of core-shell heterostructure to remedy the drawbacks of a photocatalyst and expand its application in the field of photocatalysis. (C) 2014 Elsevier B.V. All rights reserved.
机译：最近，元素半导体作为一种新型的可见光激发的光催化剂，由于其在环境修复和清洁能源产生方面的潜在应用而备受关注。然而，制造具有高活性和稳定性的元素光催化剂仍然是一个挑战。本文采用一种简单的球磨法制备了高性能的核壳型S / In2O3纳米复合光催化剂。通过扫描电子显微镜（SEM），透射电子显微镜（TEM），X射线衍射（XRD），X射线光电子能谱（XPS），紫外可见漫反射光谱（DRS），Brunauer-Emmett-柜员（BET）方法，光致发光光谱（PL）和超亲水实验。结果表明，In2O3纳米颗粒在S嵌段周围成功生长并形成核-壳异质结构。 10％S / In2O3核壳纳米复合材料在可见光照射下对罗丹明B（RhB）的降解表现出最高的光催化活性。 10％S / In2O3核-壳纳米复合材料的反应速率常数（k）约为纯In2O3和S之和的8.7倍，这是因为形成了核-壳S / In2O3异质结构，这可能弥补了这些缺点S亲水性差，增强可见光吸收并有效分离光生载流子。此外，还讨论了影响S / In2O3核-壳纳米复合材料光催化活性的机理。可以预期，我们的工作可能会为核-壳异质结构的制造开辟新的方向，以弥补光催化剂的缺点并扩大其在光催化领域的应用。 （C）2014 Elsevier B.V.保留所有权利。

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