Effect of synthesis conditions on the corrosion inhibition properties of carbon dots.
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| Title: | Effect of synthesis conditions on the corrosion inhibition properties of carbon dots. |
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| Authors: | Aslam, Ruby1,2 (AUTHOR), Solomon, Moses M.1,3,4 (AUTHOR) moses.solomon@nottingham.edu.cn, Qihui, Wang1 (AUTHOR), Sun, Yi1 (AUTHOR), Amune, Ubani O.3,4 (AUTHOR), Umoren, Saviour A.5,6 (AUTHOR), Yan, Zhitao1,7 (AUTHOR) yanzhitao@cqu.edu.cn |
| Source: | Diamond & Related Materials. Nov2025:Part B, Vol. 159, pN.PAG-N.PAG. 1p. |
| Subjects: | Inhibition (Chemistry), Carbon nanodots, Doping agents (Chemistry), Dialysis (Chemistry), Corrosion prevention |
| Abstract: | Nitrogen and sulfur co-doped carbon dots (N, S-CDs) are promising corrosion inhibitors, typically synthesized hydrothermally. This study investigates how synthesis conditions, namely reaction time (4–24 h), reaction temperature (170-230 °C), and dialysis duration (12–48 h) affect N, S-CD properties. Nine samples labelled CD-1 (190 °C, 4 h, 24 h dialysis), CD-2 (190 °C, 6 h, 24 h dialysis), CD-3 (190 °C, 12 h, 24 h dialysis), CD-4 (190 °C, 24 h, 24 h dialysis), CD-5 (170 °C, 6 h, 24 h dialysis), CD-6 (210 °C, 6 h, 24 h dialysis), CD-7 (230 °C, 6 h, 24 h dialysis), CD-8 (190 °C, 6 h, 12 h dialysis), and CD-9 (190 °C, 6 h, 48 h dialysis) are synthesized. Results show optimal conditions maximizing chromophore yield and minimizing particle size distribution were a 6 h reaction, 190 °C temperature, and dialysis ≥24 h. Particle size increased with longer reaction times and higher temperatures. Crucially, inhibition efficiency (η) in 1 M HCl at 150 mg/L directly correlated with these properties, yielding this ranking: CD-2 (94 %) > CD-1 (92 %) > CD-4 (89 %) ≈ CD-3/CD-9 (88 %) > CD-6 (87 %) > CD-7 (82 %) > CD-5 (64 %) > CD-8 (57 %). This confirms that synthesis conditions critically determine CD properties and performance. CD-2, the superior inhibitor, demonstrates temperature and immersion time dependence: η decreased with rising electrolyte temperature but improved with prolonged immersion, suggesting gradual film stabilization. [Display omitted] • The influence of synthesis conditions on N, S-doped carbon dots is studied. • Optimal conditions are 6 h reaction time at 190 °C with dialysis ≥24 h. • Inhibitor efficiency is directly linked to synthesis parameters. • CD-2 sample obtained at optimal conditions shows the highest corrosion inhibition (94 %). • CD-2 efficiency decreases with temperature but improves over time. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
| Abstract: | Nitrogen and sulfur co-doped carbon dots (N, S-CDs) are promising corrosion inhibitors, typically synthesized hydrothermally. This study investigates how synthesis conditions, namely reaction time (4–24 h), reaction temperature (170-230 °C), and dialysis duration (12–48 h) affect N, S-CD properties. Nine samples labelled CD-1 (190 °C, 4 h, 24 h dialysis), CD-2 (190 °C, 6 h, 24 h dialysis), CD-3 (190 °C, 12 h, 24 h dialysis), CD-4 (190 °C, 24 h, 24 h dialysis), CD-5 (170 °C, 6 h, 24 h dialysis), CD-6 (210 °C, 6 h, 24 h dialysis), CD-7 (230 °C, 6 h, 24 h dialysis), CD-8 (190 °C, 6 h, 12 h dialysis), and CD-9 (190 °C, 6 h, 48 h dialysis) are synthesized. Results show optimal conditions maximizing chromophore yield and minimizing particle size distribution were a 6 h reaction, 190 °C temperature, and dialysis ≥24 h. Particle size increased with longer reaction times and higher temperatures. Crucially, inhibition efficiency (η) in 1 M HCl at 150 mg/L directly correlated with these properties, yielding this ranking: CD-2 (94 %) > CD-1 (92 %) > CD-4 (89 %) ≈ CD-3/CD-9 (88 %) > CD-6 (87 %) > CD-7 (82 %) > CD-5 (64 %) > CD-8 (57 %). This confirms that synthesis conditions critically determine CD properties and performance. CD-2, the superior inhibitor, demonstrates temperature and immersion time dependence: η decreased with rising electrolyte temperature but improved with prolonged immersion, suggesting gradual film stabilization. [Display omitted] • The influence of synthesis conditions on N, S-doped carbon dots is studied. • Optimal conditions are 6 h reaction time at 190 °C with dialysis ≥24 h. • Inhibitor efficiency is directly linked to synthesis parameters. • CD-2 sample obtained at optimal conditions shows the highest corrosion inhibition (94 %). • CD-2 efficiency decreases with temperature but improves over time. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 09259635 |
| DOI: | 10.1016/j.diamond.2025.112932 |
