CsxWO3 nanorods: Realization of full-spectrum-responsive photocatalytic activities from UV, visible to near-infrared region
CsxWO3 nanorods: Realization of full-spectrum-responsive photocatalytic activities from UV, visible to near-infrared region
复制标题
CsxWO3纳米棒：实现从紫外、可见光到近红外区域的全光谱响应光催化活性
DOI：
10.1016/j.apcatb.2015.10.039
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发表时间：
2016-04-01
影响因子：
22.1
通讯作者：
Liu, Shaoqin
中科院分区：
文献类型：
--
作者：
Li, Guilian;Guo, Chongshen;Liu, Shaoqin
在光催化材料中有效利用太阳能是光化学工作者沿着十分关注的问题之一。本工作首次实现了混合价态Cs 0. 32 WO 3纳米棒单组分光催化降解亚甲基蓝的紫外、可见和近红外全光谱响应光催化活性。光学吸收结果表明，Cs0.32WO3纳米棒用于此目的的优势源于其在300-2500 nm的整个太阳光谱中的高光学吸收。得益于这种独特的光吸收特性，CsxWO 3纳米棒的光催化性能在充分利用所有太阳能方面表现出显著的优势，尤其是对于近红外部分，这部分拥有相当大比例的太阳能，但迄今为止很少被利用。在185 mW/cm（2）IN、166 mW/cm（2）可见光和42.7 mW/cm（2）NIR照射下，CsxWO 3纳米棒对MB的去除率分别为72%、70%和37%。此外，基于ESR结果和极化吸收理论，提出了一种解释Cs 0. 32 WO 3纳米棒近红外光催化活性的可能机制. (C)2015 Elsevier B. V.版权所有。
Effective utilization of solar energy in photocatalytic materials is one Of most essential issues what the photochemists are very concerned all along. In this work, full-spectrum-response photocatalytic activities covering UV, visible and near infrared regions on degradation of methylene blue have been realized firstly on single matter of the mixed valence CS0.32WO3 nanorod. As revealed by-optical absorption results, advantages of Cs0.32WO3 nanorod used in this purpose originated from its high optical absorption in the whole solar spectrum of 300-2500 nm. Benefitting from this unique photo-absorption property, the photocatalytic property of CsxWO3 nanorod displayed a significant advance-in fully utilization of all solar energy, especially for NIR part, which holds considerable percentage of sunlight but seldom is utilized up to now. The removal rates of MB on CsxWO3 nanorod were determined to be 72, 70 and 37% under 185 mw/cm(2) IN, 166 mw/cm(2) visible and 42.7 mW/cm(2) NIR irradiation within the test duration, respectively. In addition, a plausible mechanism toward understanding the near-infrared driven photocatalytic activity on Cs0.32WO3 nanorod has been proposed on the basis of ESR results and polarorr absorption theory. (C) 2015 Elsevier B.V. All rights reserved.