Chao Luomeng, Sun Changwei, Dou Jianyong, Li Jiaxin, Liu Jia, Ma Yonghong, Xiao Lihua
College of Science, Inner Mongolia University of Science and Technology, Baotou 014010, China.
Guizhou Institute of Technology, Guiyang 550003, China.
Nanomaterials (Basel). 2021 Mar 14;11(3):731. doi: 10.3390/nano11030731.
The NaWO nanoparticles with different were synthesized by a solvothermal method and the absorption behavior in visible and near-infrared light (NIR) region was studied. Well-crystallized nanoparticles with sizes of several tens of nanometers were confirmed by XRD, SEM and TEM methods. The absorption valley in visible region shifted from 555 nm to 514 nm and the corresponding absorption peak in NIR region shifted from 1733 nm to 1498 nm with the increasing x. In addition, the extinction behavior of NaWO nanoparticles with higher values were simulated by discrete dipole approximation method and results showed that the changing behavior of optical properties was in good agreement with the experimental results. The experimental and theoretical data indicate that the transparency and NIR-shielding properties of NaWO nanoparticles in the visible and NIR region can be continuously adjusted by value in the whole range of 0 < < 1. These tunable optical properties of nanocrystalline NaWO will expand its application in the fields of transparent heat-shielding materials or optical filters.
通过溶剂热法合成了具有不同x值的NaWO纳米颗粒，并研究了其在可见光和近红外光（NIR）区域的吸收行为。通过XRD、SEM和TEM方法确认了尺寸为几十纳米的结晶良好的纳米颗粒。随着x的增加，可见光区域的吸收谷从555 nm移至514 nm，近红外区域相应的吸收峰从1733 nm移至1498 nm。此外，用离散偶极近似方法模拟了具有较高x值的NaWO纳米颗粒的消光行为，结果表明光学性质的变化行为与实验结果吻合良好。实验和理论数据表明，在0 < x < 1的整个范围内，通过x值可以连续调节NaWO纳米颗粒在可见光和近红外区域的透明度和近红外屏蔽性能。这些纳米晶NaWO的可调谐光学性质将扩大其在透明隔热材料或光学滤波器领域的应用。
