Construction of 2D/2D layered g-C3N4/Bi12O17Cl2 hybrid material with matched energy band structure and its improved photocatalytic performance. Issue 43 (6th July 2018)

• Record Type: Journal Article
• Authors: Shi, Lei; Si, Weiwei; Wang, Fangxiao; Qi, Wei
• Is Part Of: RSC advances. Volume 8:Issue 43(2018)
• Page Start: 24500
• Page End: 24508
• Publication Date: 2018-07-06
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra03981j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Surface-to-surface contact g-C3 N4 /Bi12 O17 Cl2 hybrid material with a matched energy band structure could efficiently transfer photoinduced charges, improving the photocatalytic activity. Abstract : A series of visible-light-induced 2D/2D layered g-C3 N4 /Bi12 O17 Cl2 composite photocatalysts were successfully synthesized by a one step chemical precipitation method with g-C3 N4, BiCl3 and NaOH as the precursors at room temperature and characterized through XRD, FTIR, XPS, TEM, BET and UV-vis DRS measurements. The results of XRD, FTIR and XPS indicated that g-C3 N4 has been introduced in the Bi12 O17 Cl2 system. The TEM image demonstrated that there was strong surface-to-surface contact between 2D g-C3 N4 layers and Bi12 O17 Cl2 nanosheets, which contributed to a fast transfer of the interfacial electrons, leading to a high separation rate of photoinduced charge carriers in the g-C3 N4 /Bi12 O17 Cl2 system. Rhodamine B was considered as the model pollutant to investigate the photocatalytic activity of the resultant samples. The g-C3 N4 /Bi12 O17 Cl2 composite showed a clearly improved photocatalytic degradation capacity compared to bare g-C3 N4 and Bi12 O17 Cl2, which was ascribed to the interfacial contact between the 2D g-C3 N4 layers and Bi12 O17 Cl2 sheet with a matched energy band structure, promoting the photoinduced charges' efficient separation. Finally, combined with the results of the trapping experiment, ESR measurements and the band energy analysis, a reasonable photocatalytic mechanism over the 2D/2D layered g-C3 N4 /Bi12 O17 Cl2 composite was proposed.