期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 788, 期 -, 页码 1084-1092出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.03.006
关键词
Precursors effect; Structural property; Thermal polymerization; g-C3N4/ZnO composite; Core-shell morphology; Segregated morphology
资金
- Basic Science Research Program through the National Research Foundation (NRF) of Korea
- Ministry of Science, and ICT [2018R1A2B6004219]
In this study, g-C3N4/ZnO (CNZ) composite materials were synthesized through a one-step facile method with diverse precursors to investigate the interaction between g-C3N4 precursors and ZnO and the resultant morphological structures. Thiourea (Thio), urea, and dicyandiamide (DCDA) were used as g-C3N4 precursors. Several characterization methods were employed to understand the structural and optical properties affected by the interaction variation between g-C3N4 and ZnO nanoparticles during the thermal polycondensation process to the g-C3N4 structure. Consequently, each composite material resulted in different morphological composite structures. DCDA-CNZ formed a core-shell structure covered with thin g-C3N4 layers due to an efficient interaction between DCDA and ZnO nanoparticles. Meanwhile, Thio and Urea-CNZ showed a segregated morphology of porous g-C3N4 and ZnO nanoparticles in the composites, which was ascribed to a weak interaction between them and gas generation from thiourea and urea during the thermal polymerization. The core-shell morphology of DCDA-CNZ led to a unique behavior, such as the deficient electron density of Zn and g-C3N4-responded photoluminescence emission. Furthermore, DCDA-CNZ exhibited the highest efficiency for the photocatalytic degradation of methylene blue under visible-light irradiation, implying the strong influence of the morphological structure on the photocatalytic performance. (C) 2019 Elsevier B.V. All rights reserved.
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