具有可控形态/相的WO·HO晶体及其光吸收特性。

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

School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China.

Materials Center for Energy and Photoelectrochemical Conversion, School of Material Science and Engineering, University of Jinan, Jinan 250022, China.

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

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

在本工作中，开发了一种一步水热法来制备具有各种形态/相的WO₃·H₂O晶体，在此过程中未使用任何表面活性剂、模板或结构导向剂。通过调节H₂SO₄的用量和反应温度，成功获得了五种类型的WO₃·H₂O晶体，包括正交相WO₃·H₂O纳米片、矩形单斜相WO₃纳米片、正交相WO₃·0.33H₂O微球、六方相WO₃纳米棒和束状六方相WO₃分级结构。根据实验结果，提出了各种WO₃·H₂O物种的形成机制。此外，还通过紫外-可见吸收光谱研究了这些WO₃·H₂O晶体的光吸收特性。