Fabrication of electrospun nanofiber composite of g-C3N4 and Au nanoparticles as plasmonic photocatalyst
Fabrication of electrospun nanofiber composite of g-C3N4 and Au nanoparticles as plasmonic photocatalyst
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DOI：
10.1016/j.surfin.2021.101367
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发表时间：
2021-08-05
影响因子：
6.2
通讯作者：
Cunfer, Kayla
中科院分区：
文献类型：
--
作者：
Saha, Dipendu;Gismondi, Pasquale;Cunfer, Kayla
在本研究中，我们通过静电纺丝制备了由g-C3N4、金纳米粒子（AuNPs）和聚偏氟乙烯（PVDF）纳米纤维组成的等离子体光催化剂复合纳米纤维垫。采用ESEM、TEM、AFM、XPS、FTIR、XRD、TGA、PL光谱和UV-Vis反射光谱对纳米纤维毡的结构和化学性质进行了详细研究。合成图成像证实纤维直径在100-400 nm之间，g-C3N4粒径在2-8 μ m之间。ESEM背向散射（Zcontrast）电子成像显示AuNP粒径在60-160 nm之间，Au含量为0.02%。XPS和FTIR对各组分的化学性质进行了识别，发现各组分的化学结构没有发生变化。光谱学结果显示，AuNPs中载流子的弛豫引起了轻微的光谱学猝灭。通过对反射率数据的Kubeka-Munk分析计算得出带隙能量为2.94 eV。通过光电化学研究和光催化降解染料亚甲基蓝，证实了纳米纤维垫的光催化效率。复合材料经多次循环成功地降解了亚甲基蓝。
In this research, we have fabricated a composite nanofiber mat of plasmonic photocatalyst consisting of g-C3N4, gold nanoparticles (AuNPs) and random nanofibers of polyvinylidene fluoride (PVDF) by electrospinning. The structure and chemical properties of the nanofiber mat were investigated in detail by ESEM, TEM, AFM, XPS, FTIR, XRD, TGA, PL spectroscopy and UV-Vis reflectance spectra. Imaging of the composite map confirmed that the fiber diameter was in the range of 100-400 nm with the g-C3N4 size in the range of 2-8 mu m. Backscattered (Zcontrast) electron imaging in ESEM revealed that the AuNP particle size is in the range of 60-160 nm with Au content 0.02%. XPS and FTIR recognized the chemical identify of individual components and it was revealed that chemical structure of those components remained unaltered. PL spectroscopic results revealed slight PL quenching caused by the relaxation of charge carriers in the AuNPs. Bandgap energy, as calculated by Kubeka-Munk analysis of the of the reflectance data, was found to be 2.94 eV. The photocatalytic efficiency of the nanofiber mat was confirmed by photoelectrochemical study and photocatalytic degradation of a dye, methylene blue. Methylene blue was successfully degraded by the composite mat under repeated cycles.