Synthesis of a g-C3N4-Cu2O heterojunction with enhanced visible light photocatalytic activity by PEG
| Autor: | Shiyu Zuo, Dongsheng Xia, Dongya Li, Binyang Zhang, Haiming Xu, Lei Sun, Liao Wei, Jie Zan, Donghui Han |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
PEG 400
Materials science Band gap Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Biomaterials chemistry.chemical_compound Colloid and Surface Chemistry X-ray photoelectron spectroscopy chemistry Chemical engineering law Specific surface area Photocatalysis Calcination Crystallite 0210 nano-technology |
| Zdroj: | Journal of Colloid and Interface Science. 531:28-36 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2018.07.018 |
| Popis: | A g-C3N4-Cu2O was successfully synthesized in the presence of PEG-400 surfactant via a hydrothermal method and high-temperature calcination method. Based on the results of TEM, XPS, EPR, and other techniques, it was verified that a heterojunction was formed. The synthesized g-C3N4-Cu2O show excellent photocatalytic activity and stability was confirmed through cycling experiments, XRD and XPS. At a suitable addition amount, the value of band gap of g-C3N4-Cu2O is reduced to 1.87 eV, the PL intensity decreases effectively, the specific surface area is increased to 12.8114 m2/g, and the photocatalytic degradation rate is increased to 94%. Adding the surfactant PEG-400 in the precursor solutions leads to a reduction in the crystallite size, which can improve the morphology and specific surface area to form abundant heterojunction interfaces as channels for photo-generated carrier separation, and improve its light utilization and quantum efficiency. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect