Abstract In order to obtain ideal CsxWO3 powders that combine transparent thermal insulation and outstanding photocatalytic degradation of pollutants, Tm3+, Yb3+ co-doped CsxWO3 ((Tm, Yb)-CsxWO3) urchin-like nanoclusters were synthesized in situ by facile solvothermal reaction and subsequent heat treatment. The effects of Tm, Yb co-doping on the crystal structure, adsorption/photocatalysis, visible transmittance and near-infrared (NIR) absorption of CsxWO3 particles were investigated. The results indicate that the as-prepared (Tm, Yb)-CsxWO3 samples exhibit significantly improved photocatalytic activity while maintaining excellent visible transmittance and NIR shielding properties. In particular, sample 2T-10YC with 2 mol% Tm/10 mol% Yb co-doped CsxWO3 exhibited highest photocatalytic activity with the photocatalytic degradation efficiency of Rhodamine B attaining to 69.86 %, and its films prepared from dispersion of powder samples exhibit high transparent heat shielding performance with visible transmittance 71.4 % and NIR shielding rate 90.8 %, respectively. The enhanced photocatalytic activity of the sample can be ascribed to the lattice distortion and decrease of band gap caused by Tm, Yb co-doping, and the increased light utilization due to the formation of impurity energy level and multiple light reflection caused by hierarchical structure can also enhance the photocatalytic activity. Moreover, the introduction of Tm and Yb elements can also refine the CsxWO3 grains, which is conducive to improving the visible transmittance. Thus, the as-prepared bifunctional (Tm, Yb)-CsxWO3 particles will have potential application prospects in the field of energy-saving and environmental purification.

中文翻译：

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Tm、Yb 共掺杂类海胆 CsxWO3 纳米团簇具有双重功能特性：透明隔热性能和增强的光催化

摘要 为了获得理想的 CsxWO3 粉末兼具透明隔热性和出色的光催化降解污染物的能力，通过简单的溶剂热反应原位合成了 Tm3+、Yb3+ 共掺杂的 CsxWO3（（Tm，Yb）-CsxWO3）类海胆纳米团簇。热处理。研究了 Tm、Yb 共掺杂对 CsxWO3 颗粒的晶体结构、吸附/光催化、可见光透射率和近红外 (NIR) 吸收的影响。结果表明，所制备的 (Tm, Yb)-CsxWO3 样品表现出显着提高的光催化活性，同时保持出色的可见光透射率和 NIR 屏蔽性能。特别是，2 mol% Tm/10 mol% Yb共掺杂CsxWO3样品2T-10YC表现出最高的光催化活性，罗丹明B的光催化降解效率达到69.86%，其由粉末样品分散制备的薄膜表现出高透明隔热性能可见光透射率分别为 71.4% 和 NIR 屏蔽率 90.8%。样品的光催化活性增强可以归因于 Tm、Yb 共掺杂引起的晶格畸变和带隙减小，以及由于杂质能级的形成和分级结构引起的多次光反射可以提高光利用率。还可以提高光催化活性。此外，Tm和Yb元素的引入还可以细化CsxWO3晶粒，有利于提高可见光透射率。因此，