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Efficient Adsorptive Removal of Methylene Blue Dye from Aqueous Solution Using Eragrostis Teff Biomass-Derived Nitrogen and Phosphorus-Codoped Carbon Quantum Dots
Langmuir ( IF 3.7 ) Pub Date : 2023-12-26 , DOI: 10.1021/acs.langmuir.3c01813 Bisrat Nigusie Tafese 1 , Thothadri Ganesh 1 , Abraham Solomon 1 , Basker Sundararaju 2 , Nidhi Garg 2 , Biruk Alebachew 3
Langmuir ( IF 3.7 ) Pub Date : 2023-12-26 , DOI: 10.1021/acs.langmuir.3c01813 Bisrat Nigusie Tafese 1 , Thothadri Ganesh 1 , Abraham Solomon 1 , Basker Sundararaju 2 , Nidhi Garg 2 , Biruk Alebachew 3
Affiliation
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Carbon quantum dots have a great application potential in environmental protection via adsorption technology due to their large specific surface area and negative zeta potential. In this work, nitrogen and phosphorus-codoped carbon quantum dots (NP-CQDs) with a large specific surface area and negative zeta potential were successfully synthesized by a single-step hydrothermal synthesis. Batch adsorption studies were utilized to assess the adsorbent’s capacity to remove common methylene blue (MB) dye contaminants from an aqueous solution. The experiment showed that MB dye could be removed in 30 min under optimum experimental conditions, with a removal efficiency of 93.73%. The adsorbent’s large surface area of 526.063 m2/g and negative zeta potential of −12.3 mV contribute to the high removal efficiency. The Freundlich isotherm model fits the adsorption process well at 298 K, with R2 and n values of 0.99678 and 4.564, respectively, indicating its applicability. A kinetic study demonstrated that the pseudo-second-order model, rather than the pseudo-first-order model, is more suited to represent the process of MB dye adsorption onto NP-CQDs. This research established a simple and cost-effective method for developing a highly efficient NP-CQD adsorbent for organic dye degradation by adsorption.
中文翻译：
利用画眉草生物质衍生的氮磷共掺杂碳量子点有效吸附去除水溶液中的亚甲基蓝染料
碳量子点由于具有大的比表面积和负的zeta电位，在吸附技术在环境保护方面具有巨大的应用潜力。本工作通过一步水热合成成功合成了具有大比表面积和负zeta电位的氮磷共掺杂碳量子点（NP-CQD）。批量吸附研究用于评估吸附剂从水溶液中去除常见亚甲基蓝 (MB) 染料污染物的能力。实验表明，在最佳实验条件下，30 min即可去除MB染料，去除效率为93.73%。该吸附剂具有526.063 m 2 /g的大表面积和-12.3 mV的负zeta电位，有助于提高去除效率。 Freundlich等温线模型在298 K下对吸附过程拟合良好，R 2和n值分别为0.99678和4.564，表明了其适用性。动力学研究表明，伪二级模型比伪一级模型更适合代表 MB 染料吸附到 NP-CQD 上的过程。本研究建立了一种简单且经济有效的方法来开发高效的 NP-CQD 吸附剂，用于吸附降解有机染料。
更新日期：2023-12-26
中文翻译：
利用画眉草生物质衍生的氮磷共掺杂碳量子点有效吸附去除水溶液中的亚甲基蓝染料
碳量子点由于具有大的比表面积和负的zeta电位，在吸附技术在环境保护方面具有巨大的应用潜力。本工作通过一步水热合成成功合成了具有大比表面积和负zeta电位的氮磷共掺杂碳量子点（NP-CQD）。批量吸附研究用于评估吸附剂从水溶液中去除常见亚甲基蓝 (MB) 染料污染物的能力。实验表明，在最佳实验条件下，30 min即可去除MB染料，去除效率为93.73%。该吸附剂具有526.063 m 2 /g的大表面积和-12.3 mV的负zeta电位，有助于提高去除效率。 Freundlich等温线模型在298 K下对吸附过程拟合良好，R 2和n值分别为0.99678和4.564，表明了其适用性。动力学研究表明，伪二级模型比伪一级模型更适合代表 MB 染料吸附到 NP-CQD 上的过程。本研究建立了一种简单且经济有效的方法来开发高效的 NP-CQD 吸附剂，用于吸附降解有机染料。
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