Selective and Tunable Near-Infrared and Visible Light Transmittance of MoO3-x Nanocomposites with Different Crystallinity

Ning Li; Yamei Li; Guangyao Sun; Yining Ma; Tianci Chang; Shidong Ji; Heliang Yao; Xun Cao; Shanhu Bao; Ping Jin

doi:10.1002/asia.201700437

Selective and Tunable Near-Infrared and Visible Light Transmittance of MoO_3-x Nanocomposites with Different Crystallinity

Chem Asian J. 2017 Jul 18;12(14):1709-1714. doi: 10.1002/asia.201700437. Epub 2017 Jun 21.

Authors

Ning Li^{1

2}, Yamei Li³, Guangyao Sun^{1

2}, Yining Ma^{1

2}, Tianci Chang^{1

2}, Shidong Ji¹, Heliang Yao¹, Xun Cao¹, Shanhu Bao¹, Ping Jin^{1

4}

Affiliations

¹ State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Dingxi 1295, Changning, Shanghai, 200050, China.
² University of Chinese Academy of Sciences, Beijing, 100049, China.
³ Biofunctional Catalyst Research Team, Riken, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.
⁴ National Institute of Advanced Industrial Science and Technology (AIST), Moriyama, Nagoya, 463-8560, Japan.

PMID: 28636086
DOI: 10.1002/asia.201700437

Abstract

In this Communication, we report MoO_3-x nanocomposites in which the near-infrared and visible light transmittance can be selectively modulated through the crystallinity. The MoO_3-x nanocomposites were fabricated by a hydrothermal method, and their optical properties were characterized by UV-Vis spectrometer. The obtained results proved the possibility to tune the nanocomposite's optical properties in the UV/Visible spectral region: crystalline MoO₃ mainly regulates the near-infrared range (800-2600 nm), and amorphous MoO_3-x mainly changes the visible range from 350 nm to 800 nm and MoO_3-x , with semi-crystalline structures mainly modulating around 800-1000 nm. These kinds of optical modulations could be attributed to small polar absorption, free electron absorption and plasmon absorption according to different crystallinity. Our work may create new possibilities for future applications such as photochromism, photocatalysis, and electrochromism.

Keywords: MoO3 nanocomposite; crystallinity; heterostructures; optical modulations; photochromism.