化工学报 ›› 2023, Vol. 74 ›› Issue (8): 3446-3456.DOI: 10.11949/0438-1157.20230555
收稿日期:
2023-06-08
修回日期:
2023-08-14
出版日期:
2023-08-25
发布日期:
2023-10-18
通讯作者:
董社英
作者简介:
陈佳起(1999—),男,硕士研究生,chenjiaqi@xauat.edu.cn
基金资助:
Jiaqi CHEN(), Wanyu ZHAO, Ruichong YAO, Daolin HOU, Sheying DONG()
Received:
2023-06-08
Revised:
2023-08-14
Online:
2023-08-25
Published:
2023-10-18
Contact:
Sheying DONG
摘要:
为实现废弃果壳的合理利用及绿色缓蚀剂的制备,采用水热法分别合成了开心果壳碳点(pvs-CDs)及开心果壳-酒石酸复合碳点(pt-CDs),通过傅里叶红外光谱、X射线电子能谱、透射电子显微镜及荧光光谱对所制备的碳点进行表征,以电化学方法及失重法测试其缓蚀性能。结果表明,所制备的碳点对Q235碳钢在1 mol·L-1盐酸中的缓蚀效率均达90.0%以上,其中pt-CDs缓蚀性能更为优异。电化学阻抗谱表明pt-CDs对浸泡6 h后碳钢的缓蚀效率可达94.5%,这主要归因于其在碳钢表面吸附形成保护膜,显著增加了碳钢腐蚀反应活化能。同时荧光光谱和差分紫外光谱法证实pt-CDs与Fe3+的强相互作用,可进一步促进其在碳钢表面的吸附,这为探索生物质碳点类缓蚀剂的研究提供了思路。
中图分类号:
陈佳起, 赵万玉, 姚睿充, 侯道林, 董社英. 开心果壳基碳点的合成及其对Q235碳钢的缓蚀行为研究[J]. 化工学报, 2023, 74(8): 3446-3456.
Jiaqi CHEN, Wanyu ZHAO, Ruichong YAO, Daolin HOU, Sheying DONG. Synthesis of pistachio shell-based carbon dots and their corrosion inhibition behavior on Q235 carbon steel[J]. CIESC Journal, 2023, 74(8): 3446-3456.
C/ (mg·L-1) | Ecorr/ V | βa/(mV·dec-1) | βc/(mV·dec-1) | Icorr/ (A·cm-2) | η/% |
---|---|---|---|---|---|
0 | -0.464 | 9.762 | 8.752 | 6.80×10-4 | — |
10 | -0.471 | 14.801 | 8.893 | 2.27×10-4 | 66.6 |
50 | -0.472 | 14.345 | 9.037 | 8.54×10-5 | 87.4 |
100 | -0.470 | 16.093 | 9.385 | 6.02×10-5 | 91.1 |
200 | -0.471 | 14.489 | 7.522 | 6.09×10-5 | 91.0 |
300 | -0.463 | 13.289 | 7.391 | 5.57×10-5 | 91.8 |
表1 不同pt-CDs浓度下的极化曲线参数
Table 1 Polarization curve parameters at different pt-CDs concentrations
C/ (mg·L-1) | Ecorr/ V | βa/(mV·dec-1) | βc/(mV·dec-1) | Icorr/ (A·cm-2) | η/% |
---|---|---|---|---|---|
0 | -0.464 | 9.762 | 8.752 | 6.80×10-4 | — |
10 | -0.471 | 14.801 | 8.893 | 2.27×10-4 | 66.6 |
50 | -0.472 | 14.345 | 9.037 | 8.54×10-5 | 87.4 |
100 | -0.470 | 16.093 | 9.385 | 6.02×10-5 | 91.1 |
200 | -0.471 | 14.489 | 7.522 | 6.09×10-5 | 91.0 |
300 | -0.463 | 13.289 | 7.391 | 5.57×10-5 | 91.8 |
Time/h | Rs/ (Ω·cm2) | Rct/ (Ω·cm2) | Cdl/ (μF·cm-2) | n | η/% |
---|---|---|---|---|---|
0 | 4.9 | 346.4 | 112.84 | 0.81 | 90.2 |
2 | 2.0 | 375.4 | 82.03 | 0.86 | 90.9 |
6 | 1.2 | 622.6 | 68.19 | 0.89 | 94.5 |
12 | 2.4 | 381.3 | 79.97 | 0.85 | 91.1 |
24 | 4.1 | 197.2 | 101.87 | 0.84 | 82.7 |
表2 不同浸泡时间下的阻抗参数
Table 2 Impedance parameters at different immersion times
Time/h | Rs/ (Ω·cm2) | Rct/ (Ω·cm2) | Cdl/ (μF·cm-2) | n | η/% |
---|---|---|---|---|---|
0 | 4.9 | 346.4 | 112.84 | 0.81 | 90.2 |
2 | 2.0 | 375.4 | 82.03 | 0.86 | 90.9 |
6 | 1.2 | 622.6 | 68.19 | 0.89 | 94.5 |
12 | 2.4 | 381.3 | 79.97 | 0.85 | 91.1 |
24 | 4.1 | 197.2 | 101.87 | 0.84 | 82.7 |
C/(mg·L-1) | CR/(g·m-2·h-1) | η/% | ||||||
---|---|---|---|---|---|---|---|---|
303 K | 308 K | 313 K | 323 K | 303 K | 308 K | 313 K | 323 K | |
0 | 0.348 | 0.608 | 1.099 | 2.049 | — | — | — | — |
100 | 0.037 | 0.115 | 0.306 | 1.088 | 89.3 | 81.1 | 72.1 | 46.9 |
200 | 0.029 | 0.083 | 0.216 | 0.859 | 91.7 | 86.3 | 80.3 | 58.1 |
250 | 0.023 | 0.055 | 0.168 | 0.707 | 93.3 | 91.0 | 84.7 | 65.5 |
300 | 0.019 | 0.045 | 0.149 | 0.598 | 94.4 | 92.5 | 86.4 | 70.8 |
表3 失重法数据
Table 3 Weightless method data
C/(mg·L-1) | CR/(g·m-2·h-1) | η/% | ||||||
---|---|---|---|---|---|---|---|---|
303 K | 308 K | 313 K | 323 K | 303 K | 308 K | 313 K | 323 K | |
0 | 0.348 | 0.608 | 1.099 | 2.049 | — | — | — | — |
100 | 0.037 | 0.115 | 0.306 | 1.088 | 89.3 | 81.1 | 72.1 | 46.9 |
200 | 0.029 | 0.083 | 0.216 | 0.859 | 91.7 | 86.3 | 80.3 | 58.1 |
250 | 0.023 | 0.055 | 0.168 | 0.707 | 93.3 | 91.0 | 84.7 | 65.5 |
300 | 0.019 | 0.045 | 0.149 | 0.598 | 94.4 | 92.5 | 86.4 | 70.8 |
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