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Graphitic Carbon Nitride Nanosheet/FeWO4 Nanoparticle Composite for Tandem Photooxidation/Knoevenagel Condensation
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-06-15 , DOI: 10.1021/acsanm.0c01380
Afsaneh Rashidizadeh 1 , Hamid Reza Esmaili Zand 1 , Hossein Ghafuri 1 , Zeynab Rezazadeh 1
Affiliation  

A facile and convenient process for the fabrication of a Z-scheme heterojunction g-C3N4 nanosheet/FeWO4 nanoparticle composite is reported. The structure of the synthesized g-C3N4/FeWO4 nanocomposite was analyzed by a variety of techniques including X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, diffuse reflectance spectroscopy (DRS), energy-dispersive X-ray spectroscopy (EDX), inductively coupled plasma optical emission spectroscopy (ICP-OES), photoluminescence spectroscopy (PL), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA). The obtained results from DRS and PL analyses confirmed that the as-prepared nanocomposite g-C3N4/FeWO4 illustrated improved photocatalytic performance compared with pristine graphitic carbon nitride. The Z-scheme heterostructured nanocomposite (g-C3N4/FeWO4) with a suitable band structure shows efficient photocatalytic activity due to the spatial separation of charge carriers. The obtained g-C3N4/FeWO4 heterostructured photocatalyst demonstrated high efficiency in the tandem photo-oxidation/Knoevenagel condensation reaction under visible illumination and O2 atmosphere as a green oxidant. The catalytic activity of the g-C3N4/FeWO4 did not show considerable decline even after five cycles of use.

中文翻译:

用于串联光氧化/ Knoevenagel缩合的石墨化氮化碳纳米片/ FeWO 4纳米粒子复合材料

报道了一种制备Z型异质结gC 3 N 4纳米片/ FeWO 4纳米粒子复合物的简便方法。合成的gC 3 N 4 / FeWO 4的结构通过多种技术对纳米复合材料进行了分析,包括X射线粉末衍射(XRD),傅里叶变换红外光谱(FT-IR),拉曼光谱,漫反射光谱(DRS),能量色散X射线光谱(EDX),归纳法耦合等离子体发射光谱(ICP-OES),光致发光光谱(PL),场发射扫描电子显微镜(FESEM),透射电子显微镜(TEM)和热重分析(TGA)。从DRS和PL分析获得的结果证实,与原始石墨氮化碳相比,所制备的纳米复合材料gC 3 N 4 / FeWO 4表现出改善的光催化性能。Z型异质结构纳米复合材料(gC 3 N具有合适的能带结构的4 / FeWO 4)由于载流子的空间分离而显示出有效的光催化活性。所获得的gC 3 N 4 / FeWO 4异质结构光催化剂在可见光和作为绿色氧化剂的O 2气氛下,在串联光氧化/ Knoevenagel缩合反应中显示出高效率。即使在使用五个循环之后,gC 3 N 4 / FeWO 4的催化活性也没有显示出明显的下降。
更新日期:2020-07-24
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