Rational construction of 1D/2D Cu-NiS/S-g-C3N4 binary nanocomposites heterojunction enriching spatial charge carrier separation under visible light irradiation. (April 2022)

• Record Type: Journal Article
• Authors: Hakami, Othman
• Is Part Of: Materials science in semiconductor processing. Volume 141(2022)
• Publication Date: 2022-04
• Subjects: 1D/2d heterojunction -- 5CuNS -- CuNS/SCN -- Heterointerface -- Binary nanocomposites; Semiconductors -- Periodicals; Integrated circuits -- Materials -- Periodicals; Semiconducteurs -- Périodiques; Circuits intégrés -- Matériaux -- Périodiques; Electronic journals; 621.38152
• DOI: 10.1016/j.mssp.2021.106448
• Languages: English
• ISSNs: 1369-8001

Abstract

Abstract: Due to their potential to accelerate photoinduced electron/hole pair transportation, a well-defined heterojunction between the two different semiconductors was shown to improve photocatalytic performance. As a result, research has focused on building and improving heterojunctions utilizing a variety of semiconductor-based materials to improve photocatalytic activity using a variety of ways. For this purpose, g-C3 N4 (CN) is being studied as a possible photocatalytic material for the removal of organic dyes, although its high recombination rate of photogenerated charge carriers limits its use. In the current work, we used a self-assembly method to create heterojunction of 5CuNS-18-SCN binary nanocomposites (NCs). The 5CuNS-18-SCN binary NCs were confirmed by XRD data. TEM examination reveals that the binary NCs are made up of Cu–NiS (CuNS) nanorods (NRs) and nanosheets (NSs), like the morphology of S-g-C3 N4 (SCN). Even though the bandgap of SCN is 2.70 eV, the 5CuNS-18-SCN binary NCs shift the bandgap to 2.64 eV. Because of the well-defined heterojunction, the electron-hole pair recombination rate in the 5CuNS-18-SCN binary NCs is greatly decreased, as shown by photoluminescence spectrum analysis. The photoelectrochemical results show that 5CuNS-18-SCN binary NCs increases the photocurrent to 0.65 mA and effectively suppress the electron-hole pairs that were previously associated with bare NiS, CuNS, and SCN. Under visible light irradiation, the 5CuNS-18-SCN binary NCs effectively increased methylene blue (MB) decolorization to 100% for 36 min. Graphical abstract: Image 1 Research Highlights: A 1D/2D 5CuNS-18-SCN binary heterojunction with a well-refined heterointerface has been constructed. Synergetic intimate interface contacts of a 1D/2D heterojunction enabled the transfer of e - and h + . The developed 1D/2D heterojunction's improved visible light-harvesting performance. The photocatalytic performance and antibacterial activity of the 1D/2D binary heterojunction were improved.