Fluorescence Properties of the Lanthanide Supported onto Titanate Nanosheets
Fluorescence Properties of the Lanthanide Supported onto Titanate Nanosheets
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DOI：
10.17265/2162-5298/2017.08.005
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发表时间：
2017-08
期刊：
影响因子：
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通讯作者：
D. Yoshioka;Y. Nishimura;Ken‐ichi Katsumata
中科院分区：
文献类型：
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作者：
D. Yoshioka;Y. Nishimura;Ken‐ichi Katsumata
金属氧化物纳米片越来越多地用作催化剂、硬涂层和透明薄膜。在这些材料中，在液相中合成的TNS（钛纳米片）由于其亲水性、光催化活性、独特的形貌和易于合成而受到特别的关注。重要的是，TNS和金属氧化物之间的光诱导氧化还原反应提供了具有增强的光催化活性的潜在荧光金属负载的TNS，例如，Ln/TNS（镧系元素支持的TNS）。本文制备了掺杂有任意量的第5族元素（M-TNS：M = V、Nb和Ta）的TNS，以研究Ln/M-TNS的荧光激发光谱，从而阐明光沉积的机制并确定Ln/TNS荧光的来源。结果表明，光沉积过程涉及TNS与镧系氧化物之间的光诱导氧化还原反应，Ln/TNS和Ln/M-TNS的荧光强度取决于TNS和Ln激发能的重叠。
Metal oxide nanosheets are increasingly used as catalysts, hard coatings and transparent thin films. Among these materials, TNSs (Titanate Nanosheets) synthesized in liquid phase enjoy particular attention due to their water dispersibility, photocatalytic activity, unique morphology and ease of synthesis. Importantly, the photo-induced redox reaction between TNSs and metal oxides affords potentially fluorescent metal-supported TNSs with enhanced photocatalytic activity, e.g., Ln/TNSs (Lanthaide-supported TNSs). Herein, TNSs doped with arbitrary amounts of group 5 elements (M-TNSs: M = V, Nb and Ta) were prepared to investigate the fluorescent excitation spectra of Ln/M-TNSs and thus shed light on the mechanism of photodeposition and determine the origin of Ln/TNS fluorescence. As a result, photodepositiom was shown to involve phot-induced redox reaction between TNSs and lanthanide oxides, and the fluorescence intensity of Ln/TNSs and Ln/M-TNSs was demonstrated to be determined by the overlap of TNS and Ln excitation energies.