Researchers have focused on exploring various types of nanomaterial‐based adsorbents, of which carbon nanotubes (CNT) are the most promising, to offset the harmful effects of waste water‐containing dyes on both human health and aquatic ecosystems. A new, novel, efficient, rapid, and one‐pot synthetic route for synthesizing CNT has been attempted by using sodium perchlorate as a precursor at 300 °C for 3 h. Further, La‐CNT (lanthanum‐doped carbon nanotubes) has been synthesized. These materials were characterized through FTIR, FESEM, XRD, STA, EDS, and UV‐visible techniques, among others. Both materials were used as better suitable and efficient adsorbents to completely remove the toxic dye Rh‐B (Rhodamine B) (≈100% adsorption of dye) from aqueous solutions. The synthesized materials displayed lanthanum‐doped carbon nanotubes and aligned nanotubes, with lanthanum‐doped carbon buds present in La‐CNT. La‐CNT was found to be more thermally stable than CNT. Freundlich and Langmuir's isotherms were validated for the adsorption process, with pseudo‐second‐order kinetics being favored.

中文翻译：

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La-CNT的合成、表征及其在罗丹明B染料水溶液吸附中的应用


研究人员致力于探索各种类型的纳米材料吸附剂，其中碳纳米管（CNT）是最有前途的，以抵消废水中的染料对人类健康和水生生态系统的有害影响。以高氯酸钠为前驱体，在300℃下反应3小时，尝试了一种新颖、高效、快速、一锅法合成CNT的合成路线。此外，还合成了La-CNT（掺镧碳纳米管）。通过 FTIR、FESEM、XRD、STA、EDS 和紫外可见技术等对这些材料进行了表征。这两种材料都被用作更合适和更有效的吸附剂，以从水溶液中完全去除有毒染料 Rh-B（罗丹明 B）（约 100% 吸附染料）。合成材料呈现出掺镧碳纳米管和排列纳米管，La-CNT 中存在掺镧碳芽。 La-CNT 被发现比 CNT 更热稳定。 Freundlich 和 Langmuir 的等温线在吸附过程中得到了验证，伪二级动力学受到青睐。