ZnO Semiconductor Nanoparticles and Their Application in Photocatalytic Degradation of Various Organic Dyes

被引:55
|
作者
Luque-Morales, Priscy Alfredo [1 ]
Lopez-Peraza, Alejandra [1 ]
Nava-Olivas, Osvaldo Jesus [1 ]
Amaya-Parra, Guillermo [1 ]
Baez-Lopez, Yolanda Angelica [1 ]
Orozco-Carmona, Victor Manuel [2 ]
Garrafa-Galvez, Horacio Edgardo [1 ]
Chinchillas-Chinchillas, Manuel de Jesus [3 ]
机构
[1] Univ Autonoma Baja California UABC, Fac Ingn Arquitectura & Diseno, Ensenada 22860, Baja California, Mexico
[2] Ctr Invest Mat Avanzados CIMAV, Chihuahua 31136, Chihuahua, Mexico
[3] Univ Autonoma Occidente UAdeO, Dept Ingn & Tecnol, Guasave 81048, Sinaloa, Mexico
关键词
biosynthesis; Capsicum annuum var; Anaheim; organic dye; photocatalysis; ZnO nanoparticles; ZINC-OXIDE NANOPARTICLES; GREEN SYNTHESIS; METHYLENE-BLUE; RHODAMINE-B; ANTIBACTERIAL ACTIVITY; PEEL EXTRACT; LEAF EXTRACT; SOL-GEL; PERFORMANCE; ORANGE;
D O I
10.3390/ma14247537
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The biosynthesis of oxide semiconductor nanoparticles (NPs) using materials found in nature opens a wide field of study focused on sustainability and environmental protection. Biosynthesized NPs have the capacity to eliminate organic dyes, which pollute water and cause severe damage to the environment. In the present work, the green synthesis of zinc oxide (ZnO) NPs was carried out using Capsicum annuum var. Anaheim extract. The photocatalytic elimination of methylene blue (MB), methyl orange (MO), and Rhodamine B (RhB) in UV radiation was evaluated. The materials were characterized by scanning and transmission electron microscopy (SEM and TEM) and SEM-coupled energy dispersive spectroscopy (EDS), attenuated total reflectance-infrared (ATR-IR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Photoluminescence (PL), and ultraviolet-visible spectroscopy (UV-Vis). The TEM analysis showed the NPs have an average size of 40 nm and quasi-spherical shape. ATR-IR showed the ZnO NPs contained functional groups from the extract. The analysis through XRD indicated that the NPs have a hexagonal zincite crystal structure with an average crystallite size of approximately 17 nm. The photoluminescence spectrum (PL) presented an emission band at 402 nm. From the UV-Vis spectra and TAUC model, the band-gap value was found to be 2.93 eV. Finally, the photocatalytic assessment proved the ZnO NPs achieved 100% elimination of MB at 60 min exposure, and 85 and 92% degradation of MO and RhB, respectively, at 180 min. This indicates that ZnO NPs, in addition to using a friendly method for their synthesis, manage to have excellent photocatalytic activity in the degradation of various organic pollutants.
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页数:18
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