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oai:riuma.uma.es:10630/361222026-02-03T11:09:08Zcom_10630_2254col_10630_37953

RIUMA. Repositorio Institucional de la Universidad de Málaga author Meriem, Jebali author Gómez-Merino, Ana Isabel author Gianpiero, Colangelo 2025-01-10T10:45:38Z 2025-01-10T10:45:38Z 2025 Jebali, Meriem, Ana Isabel Gómez-Merino, and Gianpiero Colangelo. “Influence of the Lemon (Citrus Limon L.) Juice Amount on the Green Synthesis of CuO Nanoparticles: Characterization, Stability and Thermal Conductivity.” Ceramics international 51.1 (2025): 72–84 https://hdl.handle.net/10630/36122 10.1016/j.ceramint.2024.10.330 The characterization techniques of the three powders through TEM showed an increase of the particle diameter, dp, with the amount of lemon juice added in the synthesis process. The values of the dp were 27 nm, 31 nm and 37 nm corresponding to the ratio’s L/M = 0.33, L/M = 1 and L/M = 3, respectively. The L/M = 0.33 TEM images exhibited a more disaggregated powder and the EDX showed fewer K and P atoms as impurities. Ultrasonication time was effective in particle size reduction until an optimal value of 60 min beyond which no signiﬁcant dp reduction was observed. At 20 ◦C, DLS measurements of the three powders dispersed in EG/W (60:40) after 1h of sonication with SDS 1.5 wt% showed particle diameters of 80.6 ± 0.2 nm, 140 ± 5 nm and 196 ± 7 nm for the three L/M ratios (0.33, 1 and 3), respectively, which supposed a reduction ratio of 3.5, 3.1 and 2.2. While the zeta potential yielded optimal values of 􀀁 61.2 ± 0.9 mV, 􀀁 60.8 ± 0.7 mV and 􀀁 59.6 ± 0.4 mV, which showed a signiﬁcant improvement of the stability and quality of the nanoﬂuids. The thermal conductivity studies of the three powders revealed an enhancement of the keff compared to the base ﬂuid. It was also veriﬁed an increase in TC when rising temperature. The L/M = 0.33 nanoﬂuids demonstrated the highest TC improvement of 7.5 % vs. 5.4 % for L/M = 1 and 4.4 % for L/M = 3 nanoﬂuids, all of them at 20 ◦C, 0.02 vol%and1.5 wt% of SDS. In the three samples, the TC raised linearly with temperature. The experimental data of keff were compared with two thermal conductivity mathematical models, which mainly examine the inﬂuence of cluster formation and liquid layering organization around particles. In the two models the DLS measurements of the aggregate diameter was applied. In all cases, the deviation with respect to the experimental values was under 5 % at 20 ◦C. eng Atribución 4.0 Internacional Nanopartículas Síntesis (Química) Inﬂuence of the lemon (Citrus Limon L.) juice amount on the green synthesis of CuO nanoparticles: Characterization, stability and thermal conductivity journal article 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 URL https://riuma.uma.es/bitstreams/6d78c1c6-6ff9-4411-bd71-ce292a0e4b29/download File MD5 ac9a40dbe2a2565a5da577deef0465fd 9811082 application/pdf 1-s2.0-S027288422404851X-main.pdf