Enhanced Photoelectrocatalytic Activity of TiO 2 Nanowire Arrays via Copolymerized G-C 3 N 4 Hybridization

Yajun Wang, Runhua Li, Qiaohuan Wu, Zhuang Yang, Fan Fan, Yuming Li and Guiyuan Jiang
Additional contact information
Yajun Wang: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Runhua Li: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Qiaohuan Wu: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Zhuang Yang: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Fan Fan: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Yuming Li: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
Guiyuan Jiang: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China

Energies, 2022, vol. 15, issue 12, 1-9

Abstract: Photoelectrocatalytic (PEC) oxidation is an advanced technology that combines photocatalytic oxidation (PC) and electrolytic oxidation (EC). PEC activity can be greatly enhanced by the PC and EC synergy effect. In this work, novel copolymerized g-C 3 N 4 (denoted as CN x )/TiO 2 core-shell nanowire arrays were prepared by chemical vapor deposition. CN x were deposited on the surface of TiO 2 nanowire arrays using organic monomer 4,5-dicyanidazole and dicyandiamide as copolymerization precursor. TiO 2 nanowire arrays provide a direct and fast electron transfer path, while CN x is a visible light responsive material. After CN x deposition, the light response range of TiO 2 is broadened to 600 nm. The deposition of CN x shell effectively improves the PC efficiency and PEC efficiency of TiO 2 . Under visible light irradiation and 1 V bias potential, the rate constant k of PEC degradation of CN x /TiO 2 core-shell nanowire arrays is 0.0069 min −1 , which is 72% higher than that of pure TiO 2 nanowires. The built-in electric field formed in the interface between TiO 2 core and CN x shell would effectively promote photogenerated charge separation and PEC activity.

Keywords: photoelectrocatalysis; copolymerization; CN x; TiO 2; nanowire arrays (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/15/12/4180/pdf (application/pdf)
https://www.mdpi.com/1996-1073/15/12/4180/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:15:y:2022:i:12:p:4180-:d:832875

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().