Enhancement of the Photocatalytic Oxygen Production by Tantalum Nitride Supported Fe Atom Embedded N‐Doped Graphene Oxide†. Issue 3 (14th December 2022)

• Record Type: Journal Article
• Authors: Chen, Hanxiang; Yan, Jia; Mo, Zhao; Liu, Jinyuan; Zhu, Xianglin; Li, Huaming; Xu, Hui
• Is Part Of: Chinese journal of chemistry. Volume 41:Issue 3(2023)
• Page Start: 280
• Page End: 286
• Publication Date: 2022-12-14
• Subjects: Photocatalysis -- Electron transfer -- Fe atom embedded N‐doped graphene oxide -- Ta3N5 -- Catalysis; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cjoc.202200337
• Languages: English
• ISSNs: 1001-604X

Abstract

Comprehensive Summary: Energy crises and environmental pollution have become urgent problems with human civilization development. Photocatalysis technology is a green method to deal with these challenges. The key to improve photocatalytic efficiency lies in the effective separation of photogenerated electron–hole pairs. In this work, we designed the Fe atom embedded N‐doped graphene oxide (Fe‐NGO) supporting on tantalum nitride (Ta3 N5 ) catalyst, which was employed to improve the photocatalytic oxygen production activity. The oxygen production of 5 wt% Fe atom embedded N‐doped graphene oxide supporting on tantalum nitride (Fe‐NGO/Ta3 N5 ) was 184.7 μmol·g −1, about 3.5 times higher than that of the pure Ta3 N5 . The introduction of the cocatalyst Fe‐NGO acting as an electron conductor in the Fe‐NGO/Ta3 N5 accelerates the carrier migration of Ta3 N5 and further enhances the photocatalytic oxygen production activity. N‐doping increases the conductivity of graphene oxide (GO), and Fe atoms are used as the reactive sites to promote the combination of electron and sacrificial agent in the system. This work may provide insights into the research of new carbon cocatalyst materials. Abstract : The Fe atom‐embedded N‐doped graphene oxide supporting tantalum nitride (Fe‐NGO/Ta3 N5 ) was successfully constructed by chemical adsorption and high‐temperature calcination. The oxygen production of 5 wt% Fe‐NGO/Ta3 N5 was 184.7 μmol·g −1 in 5 h, about 3.5 times higher than that of Ta3 N5 . GO has a large specific surface area, N‐doping increases its conductivity, and Fe atoms are used as the reactive sites to promote the combination of electron and sacrificial agents. Fe‐NGO acting as an electron conductor in the Fe‐NGO/Ta3 N5 accelerates the carrier migration from Ta3 N5 and further enhances oxygen production activity.