2D Amorphous CoO Incorporated g‐C3N4 Nanotubes for Improved Photocatalytic Performance. Issue 9 (11th July 2021)

• Record Type: Journal Article
• Authors: Wang, Xiao-Rui; Yang, Kang-Xin; Ding, Shuang-Shuang; Li, Yuan-Yuan; Zhou, Bing-Xin; Huang, Gui-Fang; Hu, Wangyu; Huang, Wei-Qing
• Is Part Of: Physica status solidi. Volume 15:Issue 9(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-07-11
• Subjects: 2D/2D heterojunctions -- amorphous CoO -- g-C3N4 -- nanotubules -- photocatalysis; Solid state physics -- Periodicals; 530.4105
• DOI: 10.1002/pssr.202100254
• Languages: English
• ISSNs: 1862-6254

Abstract

Abstract : CoO nanomaterials have been identified as a potential visible‐light‐driven photocatalyst. However, they suffer from the rapid deactivation derived from the aggregation and thermally induced oxidation of CoO. Herein, a facile and scalable strategy is proposed to effectively inhibit the aggregation and oxidation of CoO via the construction of a 2D/2D amorphous CoO (a‐CoO)/g‐C3 N4 (CN) nanotubular heterojunction. The synthesized 2D/2D CN/a‐CoO heterojunction shows appreciably improved activity toward rhodamine B (RhB) degradation and no deactivation is detected even after four consecutive photodegradation cycles. Moreover, the optimized 2D/2D CN/a‐CoO heterojunction exhibits hydrogen evolution rate of 428.8 μmol h −1 g −1, which is 5.9 times than that of CN under visible‐light irradiation. The superior photocatalytic performance is attributed to the large interface between 2D components, the amorphous structure of disordered a‐CoO, the multiple scattering in the tubular heterojunction, and the efficient spatial charge‐separation through CoN bond due to the synergistic coupling effects between CN and a‐CoO. This work is helpful to promote the application of a‐CoO in photocatalysis while the unique 2D/2D heterojunction could be the fundamental basis for emerging applications in energy‐related and beyond. Abstract : CoN covalently bridged 2D/2D CN/a‐CoO heterojunctions for enhanced photocatalytic splitting water are reported. The 2D/2D CN/a‐CoO heterojunction demonstrates wide visible‐light absorption due to introduction of disordered a‐CoO and high light‐harvesting ability due to the multiple scattering in the tubular heterojunction.