WO3· n H2O Crystals with Controllable Morphology/Phase and Their Optical Absorption Properties

Ping Ou; Fangzhen Song; Yuhuan Yang; Junqi Shao; Yusen Hua; Shuhua Yang; Hebin Wang; Yudong Luo; Jian Liao

doi:10.1021/acsomega.1c07147

WO₃· n H₂O Crystals with Controllable Morphology/Phase and Their Optical Absorption Properties

ACS Omega. 2022 Mar 2;7(10):8833-8839. doi: 10.1021/acsomega.1c07147. eCollection 2022 Mar 15.

Authors

Ping Ou¹, Fangzhen Song¹, Yuhuan Yang¹, Junqi Shao¹, Yusen Hua¹, Shuhua Yang², Hebin Wang¹, Yudong Luo¹, Jian Liao³

Affiliations

¹ School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China.
² Materials Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, University of Jinan, Jinan 250022, China.
³ Testing Center, Agro-product Quality and Safety of Jiangxi Province, Nanchang 330046, China.

Abstract

In this work, a one-step hydrothermal route is developed to prepare WO₃·nH₂O crystals with various morphology/phases, for which any surfactants, templates, or structure-directing agents are not used. Five types of WO₃·nH₂O crystals, including o-WO₃·H₂O nanoplates, rectangular m-WO₃ nanosheets, o-WO₃·0.33H₂O microspheres, h-WO₃ nanorods, and bundle-like h-WO₃ hierarchical structures, are successfully obtained by adjusting the amount of H₂SO₄ and reaction temperature. According to the experimental results, the formation mechanism for various WO₃·nH₂O species is proposed. In addition, the optical absorption properties of these WO₃·nH₂O crystals are also investigated by UV-vis absorption spectra.