Oxidation of hydrogels based of sodium alginate and MnO2 as catalyst

Watandost, Hamimullah; Achak, Jailani; Haqmal, Abdullah

doi:10.53894/ijirss.v4i4.77

Cited by 13 publications

(3 citation statements)

References 11 publications

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“…Soft molds refer to a set of surfactants or surfactants such as liquid crystals, micelles. Unlike hard molds, soft molds are of organic origin and contain ligands, surfactants, and polymers [128][129][130][131]. Using soft molds such as rod-shaped micelles, Ag and gold nanowires and nanowires with controllable diameters and dimensional ratios can be synthesized.…”

Section: Soft Templatementioning

confidence: 99%

Morphological Control: Properties and Applications of Metal Nanostructures

Chupradit

Suksatan

et al. 2022

Advances in Materials Science and Engineering

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Metal nanomaterials with special physicochemical and plasmatic properties have a wide range of applications in various fields including catalysts, plasmon devices, spectroscopy, fuel cell, and various sensors including chemical, colorimetric, and fluorescence sensors. These applications are made possible by controlling the morphology and properties of nanostructures and increasing their selectivity. Various methods have been developed for the synthesis of metal nanostructures, including the use of prefabricated patterns or hard templates such as anodic aluminum oxide and soft molds such as cetyltrimethylammonium bromide (CTAB).

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Section: Soft Templatementioning

confidence: 99%

Morphological Control: Properties and Applications of Metal Nanostructures

Chupradit

Suksatan

et al. 2022

Advances in Materials Science and Engineering

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“…When these bubbles collapse onto the solid surface, the high pressure and temperature released produce microjets and shock waves directed to the solid surface. These microjets impact the surface, leading to its wear, breakage, and degradation 33 , 34 .…”

Section: Introductionmentioning

confidence: 99%

Dispersive solid phase microextraction based on magnesium oxide nanoparticles for preconcentration of auramine O and methylene blue from water samples

Qiu

Baharinikoo

et al. 2022

Sci Rep

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In this study, we investigated the process of preconcentrate and determine trace amounts of Auramine O (AO) and methylene blue (MB) dyes in environmental water samples. For this purpose, the ultrasound-assisted dispersive-magnetic nanocomposites-solid-phase microextraction (UA-DMNSPME) method was performed to extract AO and MB from aqueous samples by applying magnesium oxide nanoparticles (MgO-NPs). The proposed technique is low-cost, facile, fast, and compatible with many existing instrumental methods. Parameters affecting the extraction of AO and MB were optimized using response surface methodology (RSM). Short extraction time, low experimental tests, low consumption of organic solvent, low limits of detection (LOD), and high preconcentration factor (PF) was the advantages of method. The PF was 44.5, and LOD for AO and MB was 0.33 ng mL−1 and 1.66 ng mL−1, respectively. The linear range of this method for AO and MB were 1–1000 ng mL−1 and 5–2000 ng mL−1, respectively. In addition, the relative standard deviation (RSD; n = 5) of the mentioned analytes was between 2.9% and 3.1%. The adsorption–desorption studies showed that the efficiency of adsorbent extraction had not declined significantly up to 6 recycling runs, and the adsorbent could be used several times. The interference studies revealed that the presence of different ions did not interfere substantially with the extraction and determination of AO and MB. Therefore, UA-DMNSPME-UV/Vis method can be proposed as an efficient method for preconcentration and extraction of AO and MB from water and wastewater samples.

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“…A nominate problems in the area of the heat exchangers and micro-annulus is to boost the heat transfer performance without scarifying the pressure drop disadvantage. So, nanofluids are an advantageous choice considering their exceptional feature [5][6][7] in comparison to a liquid with micro-size particles [8], which were applied in various industries and applications [9][10][11][12][13][14]. Abdulrazzaq et al [15] conducted an empirical research on a turbulent heat transfer by nanofluid flow interaction in a cylinder geometry with sharp changes in flow.…”

Section: Introductionmentioning

confidence: 99%

Investigating non-Newtonian nano-fluid flow based on first and second law of thermodynamics by micro-annulus

Mehran¹,

Ghandilou

Yapanto

2022

Scientia Iranica

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In this study first and second law analyses of non-Newtonian nano-fluid flow through an annular cylinder filled with non-Newtonian water-CMC/TiO2 nano-fluid by considering temperature jump and slip velocity were investigated numerically. The single-phase was developed for heat transfer and nano-fluid flow. The impact of Reynolds number, nanoparticles volume fraction, temperature jump, and slip velocity on Nusselt numbers and entropy generation were evaluated and the findings were discussed considering non-Newtonian performance of working fluid. The findings indicate that note the higher shear rate in the presence of the interior wall the Nusselt number for the interior wall was higher than outside walls. According to shear-thinning fluid behavior, when the flow has a higher shear rate, apparent viscosity would be small. So, it can be concluded that the apparent viscosity of flow close to the inner wall was low which decreased the impact of viscosity force and improved heat transfer due to convection-advection phenomena. In addition, the findings showed that the entropy generation ratio is very high at the entrance and it decreased along the annular tube. Furthermore, the apparent viscosity of fluid increases by nano-particle volume fraction.

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Oxidation of hydrogels based of sodium alginate and MnO2 as catalyst

Cited by 13 publications

References 11 publications

Morphological Control: Properties and Applications of Metal Nanostructures

Morphological Control: Properties and Applications of Metal Nanostructures

Dispersive solid phase microextraction based on magnesium oxide nanoparticles for preconcentration of auramine O and methylene blue from water samples

Investigating non-Newtonian nano-fluid flow based on first and second law of thermodynamics by micro-annulus

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