Nanofluids stability on amino-silane and polymers coating titanium dioxide and zinc oxide nanoparticles

Roslan, A.A.; Zaine, Siti Nur Azella; Zaid, Hasnah Mohd; Umar, Mursyidah; Beh, Hoe Guan

doi:10.1016/j.jestch.2022.101318

Cited by 6 publications

(3 citation statements)

References 46 publications

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“…One of the key characteristics for guaranteeing a nanomaterial's reusability is its capacity for regeneration. Desorption studies offer important details on the reusability of nanomaterials and the adsorption mechanism [22][23][24]. As a result, two eluents, H 2 O and NaOH, were utilized to investigate the ability of STONPs to regenerate.…”

Section: Regeneration Study Of Stonpsmentioning

confidence: 99%

Sustainable approach for adsorptive removal of cationic and anionic dyes by titanium oxide nanoparticles synthesized biogenically using algal extract of Spirulina

Sharma,

Mittal,

Sharma

et al. 2023

Nanotechnology

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Worldwide, dyes are significant pollutants present in water because of their huge consumption for industrial purposes. These dyes as pollutants cause serious health issues in human beings and also cause the loss of aquatic biodiversity. So, remediation of pollutants like dyes from wastewater is the need of the hour. In the present study, we greenly synthesized Spirulina-mediated titanium oxide nanoparticles (STONPs) for the adsorptive remediation of cationic malachite green (MG) and anionic methyl orange (MO) dyes. The characterization of STONPs was performed by X-Ray Diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Field emission scanning electron microscopy (FESEM) with Energy Dispersive X-ray analysis (EDX), Zeta Potential & Particle size analyzer (PSA), Raman spectroscopy, and Ultraviolet-visible spectroscopy (UV-VIS). The various parameter effects like pH, nano-adsorbent dose, the concentration of dye, contact time, and temperature were also examined. Adsorption isotherms like Freundlich, Langmuir, & Temkin, and Kinetics models like Pseudo 1st and Pseudo 2nd order, Elovich Model, intraparticle diffusion model (IPDM), and Thermodynamic model were applied for a stronger interpretation. The qmax obtained from the Langmuir adsorption model was 272.4795 mg/g and 209.6436 mg/g for MO and MG correspondingly. The regeneration study of synthesized nanomaterials up to five cycles was also done. We found that greenly synthesized STONPs have great potential for adsorptive remediation for both MG and MO dyes.

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Section: Regeneration Study Of Stonpsmentioning

confidence: 99%

Sustainable approach for adsorptive removal of cationic and anionic dyes by titanium oxide nanoparticles synthesized biogenically using algal extract of Spirulina

Sharma,

Mittal,

Sharma

et al. 2023

Nanotechnology

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“…The surface coating of the nanoparticle or functionalization layers may also be one of the factors affected the overall stability of the nanofluid. As referred Roslan et al, [35], the choice of surface coating is critical, as it can impact the stability of the nanofluid. the wrong or inadequate surface coating can lead to instability, such as particle agglomeration or phase separation.…”

Section: Stability Of Nanofluids (Observation Method)mentioning

confidence: 97%

Performance Evaluation of Photovoltaic Thermal using MgO Nanofluid

Sam Yih Herng,

Mohd Afzanizam Mohd Rosli,

Nurfahana Salimen

et al. 2023

ARFMTS

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This study investigated the performance and efficiency of a photovoltaic thermal (PV/T) system utilizing a metal-based nanofluid, specifically MgO nanofluid. This research proposes MgO as nanoparticle to mix with base fluid because it demonstrated to have superior features with the highest thermal conductivity and lowest viscosity among the metal oxide. The nanofluid offered improved thermophysical properties that enhanced the PV/T system performance. The study focused on formulating a stable nanofluid, determining its thermophysical properties, and analysing the overall system performance. 0.2wt% MgO nanofluid were successfully developed and demonstrated excellent stability over a 14-day period by using a two-step method which 20 minutes of homogenization at 1000rpm and 30 minutes of ultrasonication. Tests were conducted to determine the thermal conductivity and viscosity of the nanofluid at various concentrations and temperatures. Results showed that increasing the concentration and temperature enhanced thermal conductivity, while viscosity increased with concentration but decreased with temperature. The thermal and electrical efficiencies of the PV/T system at various irradiances (200W/m2, 500W/m2 and 800W/m2), and flow rates (10L/h, 20L/h, 30L/h) were examined, calculated and compared between water and the MgO nanofluid as working fluids. At 10L/h, it was observed that nanofluid had the highest 74% of thermal efficiency increment compared to the water at 500W/m2 followed by 71% at 200w/m2 and 55% at 800W/m2. Also, Nanofluid demonstrated a 5% increase in electrical efficiency at 200W/m2, 2.1% increase at 500W/m2, and 1.9% increase at 800W/m2 compared to water. The nanofluid exhibited superior thermal and electrical efficiency compared to water, indicating its potential for improving system performance hence, surpassing the performance of a standalone PV system.

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“…One of the notable metal oxides nanoparticles used for preparing nanofluids is Zinc oxide nanoparticles and they are mainly preferring because of their remarkable stability in base fluid suspension, wide bandgap, good opto-electronic applications, easily adopt variety of molecules, and their ability to withstand high temperatures formations [5]. The stability of ZnO nanoparticles in suspension is an import factor for enhanced oil recovery since aggregation and agglomeration of nanoparticles at the reservoir pores may cause a formation damage which impose great change during oil production [6]. The impact of ZnO nanoparticles in enhanced oil recovery is still under investigation since their applications depend on reservoir conditions such as salinity, temperature, fluids saturation, wettability, and oil viscosity.…”

Section: Introductionmentioning

confidence: 99%

Stability Evaluation of Nanofluids Suitable for Enhanced Oil Recovery

Tuok,

El Kady,

Yoshitake

et al. 2023

KEM

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The evaluation of metal oxides nanoparticles stability in the base fluids has become a major aspect in enhanced oil recovery process in recent years. Physical and chemical properties of ZnO nanofluids have caught attention of many researchers because they are easily dispersed in the base fluids, better convective coefficient of heat transfer, and wider bandgap which make them remarkable nanofluids candidate compared to other metal oxides. In this study, the stability of nanofluid of zinc oxide nanoparticles was evaluated using different stability tests and analysis. However, ZnO nanoparticles were synthesized using sol-gel method and nanofluids of different concentrations were prepared. The prepared nanoparticles were characterized using various characterization techniques such as XRD, FTIR, TEM, and Zeta sizer. The stability of prepared nanofluids was investigated using sedimentation test, UV-vis spectrophotometer, and zeta analyzer. Based on physical investigation and UV-vis spectra observations, ZnO nanoparticles in base fluids have shown a good colloidal stability in addition to their high zeta potential values of-43.7 (mV) after seven days which makes it a successful potential candidate for enhanced oil recovery applications.

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Nanofluids stability on amino-silane and polymers coating titanium dioxide and zinc oxide nanoparticles

Cited by 6 publications

References 46 publications

Sustainable approach for adsorptive removal of cationic and anionic dyes by titanium oxide nanoparticles synthesized biogenically using algal extract of Spirulina

Sustainable approach for adsorptive removal of cationic and anionic dyes by titanium oxide nanoparticles synthesized biogenically using algal extract of Spirulina

Performance Evaluation of Photovoltaic Thermal using MgO Nanofluid

Stability Evaluation of Nanofluids Suitable for Enhanced Oil Recovery

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