Abstract One-dimensional (1D) Cs0.3WO3 nanofibers were controllably synthesized via a simple hydrothermal method employing different reducing agents such as ethanol, isopropanol, terpineol and 1-octadecene. The effects on the crystalline structure, size and morphology of the nanoparticles were thoroughly investigated by XRD and SEM analyses. XRD analysis shows that the different reducing agents have no significant effect on the crystal phase of the products. SEM results indicate that the 1D Cs0.3WO3 nanofibers synthesized by using 1-octadecene as a reducing agent possess uniform fiber-like morphology with smooth surface and the largest aspect ratio up to 132.3, average diameter and length of 65 nm and 8.6 μm, respectively. Moreover, all the samples exhibit a broad absorption spectrum from 780 nm to 20000 nm, and their optical properties are closely related to the aspect ratio of the samples. And the sample-1-OA with the largest aspect ratio shows excellent instantaneous photo-thermal conversion property resulting in an obvious temperature increases from 20 °C to 72.3 °C when it was irradiated by 50 W halogen lamp for 10 s.

中文翻译：

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水热法合成Cs0.3WO3纳米纤维及其光学性能

摘要 采用乙醇、异丙醇、萜品醇和1-十八碳烯等不同还原剂，通过简单的水热法可控合成一维（1D）Cs0.3WO3纳米纤维。通过XRD和SEM分析彻底研究了对纳米颗粒的晶体结构、尺寸和形态的影响。XRD分析表明，不同的还原剂对产物的晶相没有显着影响。SEM结果表明，以1-十八碳烯为还原剂合成的一维Cs0.3WO3纳米纤维具有均匀的纤维状形态，表面光滑，最大纵横比可达132.3，平均直径和长度分别为65 nm和8.6 μm . 此外，所有样品都表现出从 780 nm 到 20000 nm 的宽吸收光谱，它们的光学性质与样品的纵横比密切相关。并且具有最大纵横比的样品-1-OA显示出优异的瞬时光热转换性能，当它被50 W卤素灯照射10 s时，温度从20°C明显升高到72.3°C。