Figure - available from: Journal of Materials Science: Materials in Electronics
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Schematic illustration of charge transfer in a coupled semiconductor system (NiWO4/CdO nanocomposites)
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NiWO4 nanostructure and NiWO4/CdO nanocomposites have been prepared through a new rapid co precipitation in presence of tween 80 as capping agent at 500 for 30 min. This study aimed to investigate the effects metal to capping agent ratios on the morphology and particle size of final products. Furthermore, due to occurrence of red shift in nonanocom...
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Organic pollutants from the industries and anthropogenic sources pose severe problems to both the environment and human health. Hence, there is the need to eliminate these pollutants from our water bodies, as safe drinking water is a major prerequisite for healthy life and also as precious resources for human civilisation. In this study, a photocat...
In this study, Fe3O4 magnetic nanoparticles were prepared from FeCl2/FeCl3 and NaOH solution by chemical co-precipitation method in an impinging stream-rotating packed bed. Then, Fe3O4/TiO2 photocatalyst was prepared for photocatalytic degradation of phenol by sol–gel method using butyl titanate and Fe3O4 magnetic nanoparticles. The surface morphol...
Citations
... A lot of new metal oxide and metal ion-doped metal oxide semiconductor materials have been made recently for photocatalysis. These include Fe 2 O 3 , [4] CuO, [5] ZnO, [6] TiO 2 , [7] WO 3 , [8] CeO 2 , [9] ZnWO 4 , [10] NiWO 4 [11] and many more. Even though the photocatalytic performance limits generated charge carriers' rapid recombination and migration distance, consequently, the development of highperformance semiconductor materials has drawn tremendous attention in the field of photocatalysts. ...
Recently, the environmental contamination caused by toxic dyes has posed a severe threat to human health. Semiconductor‐based photocatalysis is gaining a lot of attention due to its potential applications in environmental remediation. Herein, photocatalytic reactive FeCoWO4/g‐C3N4 nanocomposites were prepared through a facile route hydrothermal process. The bare FeCoWO4, g‐C3N4 and FeCoWO4/g‐C3N4 nanocomposites possess specific features, including reactive surface sites, improved efficiency of charge transfer, and accelerated separation of photogenerated electron‐hole pairs. As a result, the photocatalytic activity towards methylene blue dye (MB) degradation activity of FeCoWO4/g‐C3N4 nanocomposites is significantly improved. Thus, photocatalysts exhibited the highest degradation activities and could remove 91.5 % of MB dye within 120 minutes of visible light irradiation. The enhanced photocatalytic activity with excellent recyclability shows potential for the practical application of FeCoWO4/g‐C3N4 nanocomposites for wastewater treatment.
... One millimole of cadmium nitrate warm solution (70 • C) and Fe 3 O 4 dispersion were added to 50 mL of NaOH with a concentration of 2.5 mol L −1 under stirring conditions for 15 min. Finally, the CdO/Fe 3 O 4 precipitation was rinsed with distilled water and after drying, it was calcined at 450 • C for 70 min (Vosoughifar, 2018). ...
With the development of nanomaterials in electrochemical sensors, the use of nanostructures to modify the electrode surface has been shown to improve the kinetics of the electron transfer process. In this study, a sensor was developed for the electrochemical determination of Acyclovir (ACV) based on the modified carbon paste electrode (CPE) by CdO/Fe3O4. The magnetic CdO nanoparticles characterization was studied by energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). To study of the modified CPE surface morphology, scanning electron microscopy (SEM) was used. At the optimal conditions, a noteworthy enhancement in the electrochemical behavior of ACV was observed at the surface of the modified CPE compared to the unmodified CPE. A detection limit of 300 nM and a linear range of 1–100 μM were obtained for the quantitative monitoring of ACV at the modified CPE surface using differential pulse voltammetry (DPV) in phosphate buffer. The RSD% (relative standard deviation) of the electrode response was <4.3% indicating the development of a high precision method. Also, satisfactory results were obtained in the determination of ACV with the modified electrode in tablet, blood serum, and urine samples with a satisfactory relative recovery (RR%) in the range of 94.0–104.4%.
... In this context, the photo catalytic properties of pure NiWO4 nanocrystals exhibit interesting industrial applications such as the photodegradation of methylene blue [13], remazol brilliant violet 5R (RBV5R) [14], methyl orange [15], 4-nitrophenol [16] and rhodamine b [17] at room temperature. ...
The different pH levels of NiWO4 materials were synthesized by co-precipitation route. The insight unit cell properties were studied by Powder X-ray diffraction (PXRD). The detailed structural analyses were done by Rietveld profile refinement method. The morphology on the surface of the synthesized NiWO4 materials was evaluated by scanning electron microscopic images. The presence of elements in the prepared materials were confirmed by energy dispersive X-ray spectroscopy (EDS) analysis. The photocatalytic activities of prepared materials are performed on methylene blue which is degraded by irradiation of catalyst in 50 minutes under ultra violet light.
