Stable hydrogen bonding interactions in supramolecular deep eutectic solvents based on carbon quantum dots: For extraction and oxidative desulfurization

IF 9.1 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2023-10-15 Epub Date: 2023-07-01 DOI:10.1016/j.seppur.2023.124491

Meijun Chen , Changjun Zou , Wenyue Tang , Yixuan Cao

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引用次数: 0

Abstract

Supramolecular deep eutectic solvent (SUPRADES) was a promising green solvent with physicochemical properties that was similar to those of conventional deep eutectic solvent (DES). The supramolecular deep eutectic solvent-based nanofluidic system (β-CD-CA/CQDs) was constructed by using β-cyclodextrin as the hydrogen bond acceptor and citric acid as the hydrogen bond donor with the addition of carbon quantum dots (CQDs). The addition of CQDs enhanced the desulfurization ability and hydrogen bonding stability of SUPRADES. By controlling the content of CQDs solution, the viscosity of β-CD-CA/CQDs can be easily changed without altering its eutectic nature. The effects of temperature, O/S, sulfur content, oil content and different sulfides on the sulfur removal of β-CD-CA/CQDs were investigated. The sulfur removal of β-CD-CA/CQDs was up to 99.32% at 50 °C. The cyclic voltammetric tests, recovery experiments, and characterization all showed that β-CD-CA/CQDs had excellent recoverability and stability in desulfurization.

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基于碳量子点的超分子深共晶溶剂中稳定的氢键相互作用:用于萃取和氧化脱硫

超分子深共晶溶剂(SUPRADES)具有与传统深共晶溶剂(DES)相似的理化性质，是一种很有前途的绿色溶剂。以β-环糊精为氢键受体，柠檬酸为氢键给体，添加碳量子点(CQDs)，构建了超分子深度共晶溶剂基纳米流体体系(β-CD-CA/CQDs)。CQDs的加入提高了SUPRADES的脱硫能力和氢键稳定性。通过控制CQDs溶液的含量，可以很容易地改变β-CD-CA/CQDs的粘度，而不改变其共晶性质。考察了温度、O/S、硫含量、含油量和不同硫化物对β-CD-CA/CQDs脱硫的影响。在50℃下，β-CD-CA/CQDs的硫去除率可达99.32%。循环伏安测试、回收率实验和表征均表明，β-CD-CA/CQDs具有良好的脱硫回收率和稳定性。

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.