Comprehensive evaluation of TiO2 nanofluid stability: Insights from pH, EC measurements, and UV-Vis spectroscopy

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects Pub Date : 2024-10-28 DOI:10.1016/j.nanoso.2024.101387

Chakar Khadija , Asdiou Nouhaila , Salhi Anas , Salhi Imane , El Mouden Mahmoud , Hajjaji Abdelowahed , Muthanna H. Al-Dahhan

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Abstract

This study delves into assessing the stability of different nanofluids containing TiO₂ nanoparticles, employing either ethylene glycol (EG) or water as the base fluid. The results obtained will be applied to photovoltaic panels in future work, in particular to solve the cooling problems facing these systems, in order to improve their efficiency and durability. The nanoparticles, approximately 75 nm in size as determined by the Debye-Scherrer equation and X-ray diffraction (XRD), were utilized to formulate nanofluids at concentrations of 0.1 %, 0.3 %, and 0.5 % using a two-step method. To gauge the stability of these prepared nanofluids, practical investigations were conducted involving pH and electrical conductivity (EC) measurements, along with UV-Vis spectroscopy spanning the wavelength range of 200–800 nm. The findings reveal that nanofluids with 0.1 % and 0.5 % TiO₂ in water demonstrated promising stability. Moreover, the absorbance levels of nanofluids containing 0.1 %, 0.3 %, and 0.5 % TiO₂ in EG, as well as 0.3 % TiO₂ in water, decreased with increasing settling time, as observed through UV-Vis spectroscopy analysis, consistent with prior research. Additionally, the study of pH and EC stability for 0.5 % TiO₂ in water indicated satisfactory results.

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全面评估 TiO2 纳米流体的稳定性：从 pH 值、导电率测量和紫外可见光谱中获得的启示

本研究采用乙二醇（EG）或水作为基液，深入评估了含有二氧化钛纳米颗粒的不同纳米流体的稳定性。获得的结果将在今后的工作中应用于光伏电池板，特别是解决这些系统面临的冷却问题，以提高其效率和耐用性。通过德拜-舍勒方程和 X 射线衍射 (XRD) 测定，纳米粒子的尺寸约为 75 纳米，利用这种纳米粒子，采用两步法配制出浓度分别为 0.1%、0.3% 和 0.5% 的纳米流体。为了衡量这些制备的纳米流体的稳定性，进行了实际调查，包括 pH 值和导电率 (EC) 测量，以及波长范围为 200-800 纳米的紫外可见光谱分析。研究结果表明，在水中添加 0.1 % 和 0.5 % TiO2 的纳米流体具有良好的稳定性。此外，通过紫外可见光谱分析观察到，EG 中含 0.1 %、0.3 % 和 0.5 % TiO2 的纳米流体以及水中含 0.3 % TiO2 的纳米流体的吸光度随着沉淀时间的增加而降低，这与之前的研究结果一致。此外，对水中 0.5 % TiO2 的 pH 值和导电率稳定性的研究结果令人满意。

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来源期刊

Nano-Structures & Nano-Objects Physics and Astronomy-Condensed Matter Physics

CiteScore

9.20

自引率

0.00%

发文量

审稿时长

22 days

期刊介绍： Nano-Structures & Nano-Objects is a new journal devoted to all aspects of the synthesis and the properties of this new flourishing domain. The journal is devoted to novel architectures at the nano-level with an emphasis on new synthesis and characterization methods. The journal is focused on the objects rather than on their applications. However, the research for new applications of original nano-structures & nano-objects in various fields such as nano-electronics, energy conversion, catalysis, drug delivery and nano-medicine is also welcome. The scope of Nano-Structures & Nano-Objects involves: -Metal and alloy nanoparticles with complex nanostructures such as shape control, core-shell and dumbells -Oxide nanoparticles and nanostructures, with complex oxide/metal, oxide/surface and oxide /organic interfaces -Inorganic semi-conducting nanoparticles (quantum dots) with an emphasis on new phases, structures, shapes and complexity -Nanostructures involving molecular inorganic species such as nanoparticles of coordination compounds, molecular magnets, spin transition nanoparticles etc. or organic nano-objects, in particular for molecular electronics -Nanostructured materials such as nano-MOFs and nano-zeolites -Hetero-junctions between molecules and nano-objects, between different nano-objects & nanostructures or between nano-objects & nanostructures and surfaces -Methods of characterization specific of the nano size or adapted for the nano size such as X-ray and neutron scattering, light scattering, NMR, Raman, Plasmonics, near field microscopies, various TEM and SEM techniques, magnetic studies, etc .