Facile and green synthesis of a ZnO/CQDs/AgNPs ternary heterostructure photocatalyst: study of the methylene blue dye photodegradation
Source abstract
Abstract
A photocatalyst based on a ZnO/CQDs/AgNPs ternary heterostructure was synthesized by a green and easy in-situ hydrothermal method. The carbon quantum dots (CQDs) were used in order to reduce AgNO3 to form silver nanoparticles (AgNPs). The as-prepared photocatalyst was characterized by different techniques such as X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectrometer, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and Bruner–Emmett–Teller. The optical properties of the nanocomposites were examined using UV–visible spectrophotometer. The photocatalytic activity of ZnO/CQDs/AgNPs was evaluated by degradation of methylene blue (MB) under UV light irradiation. The ternary heterostructure exhibits higher photocatalytic activity compared to pure ZnO, ZnO/CQDs and ZnO/Ag. It was found that a degradation of 98.6% of MB was achieved within 50 min of UV light irradiation. Finally, a possible mechanism is proposed to explain the photodegradation of MB by this nanocomposite.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Carbon and Quantum Dots Applications · Advanced Photocatalysis Techniques · Nanocluster Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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