Oxygen vacancy-rich defective tungsten oxide (WO3-x) modified by Prussian blue for efficient photocatalytic carbon dioxide conversion and tetracycline degradation

Ruolin Cheng; Xiyao Niu; Han Li; Huagen Liang; Panagiotis Tsiakaras

doi:10.1016/j.jcis.2024.12.146

Oxygen vacancy-rich defective tungsten oxide (WO_3-x) modified by Prussian blue for efficient photocatalytic carbon dioxide conversion and tetracycline degradation

J Colloid Interface Sci. 2024 Dec 19;683(Pt 2):807-816. doi: 10.1016/j.jcis.2024.12.146. Online ahead of print.

Authors

Ruolin Cheng¹, Xiyao Niu², Han Li², Huagen Liang³, Panagiotis Tsiakaras⁴

Affiliations

¹ Jiangsu Key Laboratory of Coal-based Greenhouse Gas Control and Utilization, Carbon Neutrality Institute, China University of Mining and Technology, 221008 Xuzhou, Jiangsu, China.
² School of Information and Control Engineering, China University of Mining and Technology, Xuzhou 221116, China.
³ Jiangsu Key Laboratory of Coal-based Greenhouse Gas Control and Utilization, Carbon Neutrality Institute, China University of Mining and Technology, 221008 Xuzhou, Jiangsu, China; School of Materials Science and Physics, China University of Mining and Technology, Xuzhou 221008, China; Laboratory of Alternative Energy Conversion Systems, Department of Mechanical Engineering, School of Engineering, University of Thessaly, Pedion Areos 38834, Greece. Electronic address: lianghg@cumt.edu.cn.
⁴ Laboratory of Alternative Energy Conversion Systems, Department of Mechanical Engineering, School of Engineering, University of Thessaly, Pedion Areos 38834, Greece. Electronic address: tsiak@uth.gr.

PMID: 39752930
DOI: 10.1016/j.jcis.2024.12.146

Abstract

The coupling of carbon dioxide (CO₂) with epoxides to produce cyclic carbonates is a desirable decarbonization approach, but its commercial applicability is still restricted by the costly catalysts required, as well as the need for high temperature and high pressure. Herein, oxygen vacancy-rich defective tungsten oxide (WO_3-x) rich in Lewis acid sites was modified by Prussian blue (PB), and the obtained composite reaches up to 94 % styrene carbonate yield (171 mmol g^-1h^-1) at ambient temperature and pressure, exhibiting outstanding advantages in the photocatalytic CO₂ cycloaddition reaction compared with currently reported photocatalysts. It is found that the introduction of PB with photothermal properties significantly enhances the capability of WO_3-x to absorb and activate CO₂ and epoxide, along with its light utilization ability. PB acts as an electron reservoir to promote the separation and migration of photoinduced electrons and holes. The synergistic catalytic effect between photogenerated charge carriers and photothermal effect has been verified. The PB-modified WO_3-x composites can also achieve complete tetracycline (TC) degradation in 30 min, and this excellent photo-Fenton TC removal activity is attributed to the combined action of active species (^•OH, ¹O₂, h⁺, ^•O₂^-). This work aims to offer fresh perspectives on developing bifunctional photocatalysts for CO₂ conversion and environmental remediation.

Keywords: CO(2) cycloaddition; Photocatalysis; Prussian blue; Tetracycline degradation; Tungsten oxide.