Efficient Fe2O3/C-g-C3N4 Z-scheme heterojunction photocatalyst prepared by facile one-step carbonizing process. (July 2019)

• Record Type: Journal Article
• Authors: Kang, Myung Jong; Yu, Hyejin; Lee, Wonjoo; Cha, Hyun Gil
• Is Part Of: Journal of physics and chemistry of solids. Volume 130(2019)
• Page Start: 93
• Page End: 99
• Publication Date: 2019-07
• Subjects: Photocatalysis -- Iron oxide -- g-C3N4 -- Z-scheme heterojunction -- Photodegradation; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2019.02.017
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: Photocatalytic water purification has emerged as new effective ways for an environment preserve and purification in few decades. As a part of studies on photocatalytic water purification, constructing heterojunction structured compounds with different photocatalysts for efficient organic pollutant degradation is regarded as key-strategy. Herein, facile one-step carbonizing process was introduced for synthesizing Fe2 O3 /C-g-C3 N4 based Z-scheme heterojunction photocatalyst. The two times of photocatalytic organic pollutant degradation rate of Fe2 O3 /C-g-C3 N4 based Z-scheme heterojunction photocatalyst was enhanced comparing with pristine Fe2 O3 /g-C3 N4 heterojunction photocatalyst through rhodamine B (RhB) degradation under AM 1.5G (100 mWcm −2, 1 sun) illumination. The reasons for enhanced photocatalytic RhB degradation efficiency of Fe2 O3 /C-g-C3 N4 based Z-scheme heterojunction photocatalyst were revealed to efficient charge transfer during light induced RhB degradation reaction by constructing junction structures among Fe2 O3, amorphous carbon layer and g-C3 N4, which proved by fluorescence spectroscopy, XPS, SEM, TEM and UV–Vis analysis. Graphical abstract: Image 1 Highlights: Fe2 O3 /g-C-3 N4 (Fg) and Fe2 O3 /C-g-C3 N4 (FCg) heterojunction photocatalysts synthesized via simple solid-state reaction. Z-scheme heterojunction between Fe2 O3 and g-C3 N4 was constructed by insertion of amorphous carbon layer. Photocatalytic activities of double charge transfer or Z-scheme heterojunction between Fe2 O3 and g-C3 N4 was studied.