查找使用阿拉丁产品的科研文献

High-efficient separation mechanism of Co/Mo/V system by ethanolamine-induced phosphonic acid extractants

Hongtao Liu,Jiawei Wen,Lei Cao,Junlian Wang,Xin Wang,Guoyong Huang,Shengming Xu

Conventional phosphonic acid extractants such as bis (2-ethylhexyl) phosphate (P204) have only been used for cobalt extraction and perform poor separation efficiency. In this work, we propose a route to synergistically extract and separate Co, Mo, and V from spent hydrogenation catalysts by utilizing the modulating effect of ethanolamine (MEA) on phosphonic acid-based extractants, which eliminates the need for saponification and acidification of the extractants. The extraction mechanism of V, Co and Mo have been explained detailedly. By performing quantum chemical calculations on the surface properties of various amines, their metal extraction effects were predicted and validated using machine learning, laying the foundation for the design of synergistic extractants. The Co/Mo/V selective separation process was finally built with the aim of extracting cobalt first in the form of Co(RNH 2 ) 2 A 2 . At a P204 concentration of 25 %, MEA addition of 5 %, stirring time of 10 min, stirring rate of 400 rpm, the combined recoveries of the three metals Co, V and Mo reached 94.56 %, 85.60 % and 88.81 %, the separation factors β Co/Mo and β Co/V could be increased up to 44748.77 and 1174.04, respectively. It was also demonstrated that the extractant was also suitable for the selective extraction of Ni 2+ . This work provided fundamental research for the development of high-performance extraction systems.

Structural effect on physicochemical properties of ethanolamine carboxylate ionic liquids by experimental and theoretical study

Xinyuan Zhang,Xinyao Tang,Zhenhai Zhong,Xinyi Ge,Qingguo Zhang

The hydroxylammonium ionic liquids (ILs) falling within the category of protic ionic liquids (PILs) have garnered attention from researchers, owing to their outstanding solubility properties. A one-step method was employed to synthesize a series of ethanolamine ILs. The thermodynamic properties of the ILs, including surface tension, density, and electrical conductivity, were measured across varying temperatures. Essential parameters such as thermal expansion coefficient, molecular volume, surface entropy, and surface energy were estimated using empirical equations. In order to elucidate the intermolecular interactions within the ethanolamine carboxylate ILs, the sigma profiles of ILs were determined using COSMO-RS. It was observed that the ethanolamine cation has a strong potential as a H-bond donor, while the carboxylate anion demonstrates significant capability as a hydrogen bond acceptor. By DFT calculations, it was observed that the N H in the ethanolamine cation can form H-bonds with the oxygen atom in the carboxylate anion.

Protic ethanolamine hydrochloride-based deep eutectic solvents for highly efficient and reversible absorption of NH3

Qi Luo,Jingai Hao,Ligang Wei,Shangru Zhai,Zuoyi Xiao,Qingda An

Ammonia (NH 3 ) is essential for nitrogen fertilizer and is also considered as a promising energy carrier recently. In considering the role of NH 3 for energy storage, the health and environmental risks from NH 3 emission must be minimized and efficiently eliminated. To this end, a wide range of materials such as metal halides, ionic liquids and porous materials have been examined for NH 3 absorption. Deep eutectic solvents (DESs) with unique properties and low cost are considered as potential solvents for absorbing NH 3 . Herein, we report a DES composed of protic ethanolamine hydrochloride (EACl), weakly acidic resorcinol (Res) and neutral glycerol (Gly) can absorb 0.240 g NH 3 /g DES for EACl/Res/Gly (1:4:5) at 293 K and 0.1 MPa, which is much higher than most of reported DESs. The absorption mechanism of NH 3 is hydrogen-bonding interaction from the results of NMR and FT-IR spectra. The ternary DESs EACl/Res/Gly have abundant hydrogen-bonding sites to absorb NH 3 without structural damage, in which EACl and Res play a major role in the interaction with NH 3, while Gly is helpful for structural stability during NH 3 absorption. Besides, DES EACl/Res/Gly (1:4:5) has good reversibility, excellent NH 3 /CO 2 selectivity, is a potential NH 3 absorption and storage material for industrial application.

Pretreatment of wheat straw using basic ethanolamine-based deep eutectic solvents for improving enzymatic hydrolysis

Zheng Zhao,Xiaochun Chen,Muhammad Furqan Ali,Ahmed A. Abdeltawab,Sobhy M. Yakout,Guangren Yu

A series of ethanolamine based deep eutectic solvents (DESs), which have strong basicity, were firstly applied in wheat straw pretreatment. Typically, choline chloride: monoethanolamine (C:M) as the best solvent among these DESs can remove 71.4% lignin and reserve 93.7% cellulose (70 °C, L/S mass ratio of 20:1, 9 h), and improve the enzymatic hydrolysis of residue, i.e., 89.8% cellulose and 62.0% xylan conversion. The pretreatment capacity of C:M is comparable to other solvents while C:M has several advantages, e.g., lower cost with cheap materials and simpler preparation process, mild conditions and lower polysaccharide loss. The XRD, SEM and FT-IR results verified that the polysaccharide conversion and sugars yield were enhanced by the removal of lignin in the pretreatment process. The basic ethanolamine based DESs are promising solvents for industrial application of wheat straw pretreatment.

Ethanolamine- and amine-functionalized porous cyclodextrin polymers for efficient removal of anionic dyes from water

Hui-Ling Duan,Xu Deng,Jun Wang,Li Fan,Yu-Cheng Yang,Zhi-Qi Zhang

Functionalized modification of materials can be used to tailor their interaction ability and adsorption performance toward target pollutants. Tetrafluoroterephthalonitrile-linked porous β-cyclodextrin polymer (P-CDP) has excellent adsorption capacity toward cationic and neutral pollutants, but a weak ability to adsorb anionic pollutants. Herein, two modified cyclodextrin polymers were prepared. The nitrile groups in P-CDP were transformed into ethanolamine and amine via the reaction with ethanolamine and borane complexes, and the obtained products were used for dye removal. The functional modification changed the adsorption selectivity from toward cation to toward anion, and significantly improved the adsorption capacity toward anion. Using methyl orange as the model anionic adsorbate, the maximum adsorption capacity of ethanolamine-functionalized one reached 625 mg g −1 , which is far higher than those of most reported adsorbents. The adsorption isotherms better fitted to Langmuir model and kinetic study showed a pseudo second-order adsorption. The as-prepared modified-polymers with superior adsorption ability and selectivity toward anion are expected to be applied to removing anionic pollutants from waste water.

How to active ethanolamine for selective hydrogenation by imidazolium-based cation and conjugated π bond

Zichen Zhang,Donglin Yang,Jiaqiang Wang,Chaoting Deng,Hengjun Gai,Meng Xiao,Tingting Huang,Quanhong Zhu,Hongbing Song

Ionic liquids (ILs) are unique substances with unique ionic sites. They are regarded as one of the most promising green solvents and catalysts in the 21st century. In this work, the synthesis of imidazolium-based ILs as metal-free catalysts by molecular design is reported for the first time. By using the ILs as precursors, hyper-crosslinked poly(ionic liquid) (HCPIL) was synthesized by Friedel–Crafts alkylation reaction. These metal-free catalysts can effectively activate ethanolamine for the hydrogenation of nitrobenzene, and they have definite active sites. As the synthesized HCPIL-Cl has a rich porous structure and IL structural units, it could maintain the catalytic activity of ILs and recover them via efficient facile filtration and washing. Density functional theory (DFT) calculation suggested that the imidazolium structure is essential to ethanolamine activation. The calculated results of DFT agree well with the experimental results. The hydrogenation of nitrobenzene has many intermediates whose selectivity can be regulated by different gas atmosphere or alkaline environments. This work provides a promising method for the design of metal-free catalysts.

Robust ionic liquid/ethanolamine-superbase solvents enable rapid, efficient and mild dissolution of lignocellulosic biomass

Yang Wang,Huan Wang,Lan Chen,Weitao Wang,Zhaohui Yang,Zhimin Xue,Tiancheng Mu

Dissolution of lignocellulose is of significant importance for its utilization and transformation. However, it remains a great challenge to efficiently and rapidly dissolve lignocellulose under mild conditions owing to the significant lack of efficient solvents for lignocellulose dissolution. Herein, robust solvent systems were designed by a combination of ionic liquids (ILs), ethanolamine (EA), and organic superbases for the dissolution of lignocellulose. It was observed that the prepared solvents (denoted as the IL/EA-superbase) could efficiently dissolve lignocellulose at mild temperatures (below 100 °C). In particular, the EmimOAc/EA-DBN system showed the best performance, and the solubility values of Populus tomentosa, sugarcane bagasse and Miscanthus giganteus at 90 °C could reach up to 3.8%, 9.5% and 20% (g per 100 g solvent), respectively. It was revealed that EA-superbase effectively participated in the interaction between ILs and lignocellulose, thus promoting the dissolution process. A systematic study revealed that the good performance of the developed solvents toward lignocellulose dissolution resulted from the synergistic effect of the three constructed components to make the solvent have a suitable capacity for the formation of hydrogen-bonding and an appropriate microstructure.

Synergistic pretreatment with sodium sulfite and ethanolamine improves lignin removal and enzymatic hydrolysis of reed biomass

Hao Tong,Yehan Tao,Jinwen Hu,Jian Du,Jie Lu,Bin Li,Chenglong Fu,Zhenglei Jia,Haisong Wang

The efficient pretreatment of biomass to achieve high-value utilization is a critical challenge in advancing bioenergy applications. This study presents a synergistic pretreatment method using sodium sulfite and ethanolamine to enhance the conversion efficiency of reed biomass. This approach facilitates the direct utilization of lignin while significantly improving the enzymatic hydrolysis of cellulose fibers. At optimal pretreatment conditions (20 % sodium sulfite and 25 % ethanolamine; 170 °C; 40 min), the enzymatic hydrolysis of pretreated reed achieved an efficiency of 81.68 % and a glucose yield of 77.52 %. Compared to single-agent pretreatment, the synergistic pretreatment with sodium sulfite and ethanolamine increased the reed lignin removal rate by 46.86 % and 60 %, respectively. Ethanolamine functions as a surfactant, enhancing the penetration of sodium sulfite and promoting lignin sulfonation, thereby improving biomass accessibility. This study demonstrates that the synergistic pretreatment method not only streamlines lignin separation but also significantly improves enzymatic hydrolysis efficiency, offering a promising pathway for advancing renewable bioenergy production and energy-efficient biomass utilization.

Ethanolamine Modified ZnO Nanorods-Based Disposable Gate-AlGaN/GaN High Electron Mobility Transistor for pH Sensing

Zhiqi Gu,Jin Wang,Bin Miao,Xinsheng Liu,Lei Zhao,Huoxiang Peng,Dongmin Wu,Jiadong Li

Ethanolamine-Induced Hydrophilic Transition in Coaxial Electrospun C-MNF for Co3O4 Nanoneedle Growth toward Flexible Supercapacitors

Jun Yu,Yi Liu,Mengqi Wang,Xiaoxin Guo,Xingyu Zhang,Yihang Dong,Jiawei Yan,Keqin Zhang,Yuqing Liu

Hydrophilic modification of materials is crucial for optimizing the performance of flexible supercapacitors, which are promising energy-storage devices for flexible and wearable electronics. However, enhancing the wettability of coaxial electrospun membranes to facilitate the uniform growth of active materials and improve electrochemical performance remains a key challenge. Herein, we propose a hydrophilic modification strategy using ethanolamine (MEA) heat treatment, which significantly enhances the wettability of coaxial electrospun CNT/MOF-5/PAN/PVDF (C-MNF) membranes and promotes the uniform in situ growth of Co3O4 nanoneedles. Characterization results reveal that hydrophilic modification improves the penetration and diffusion of Co2+ ions within the substrate, optimizing the nucleation and growth environment for Co3O4 crystals. By integrating multiple mechanisms such as Zn2+/Co2+ ion exchange, Fe3+-induced oxidation, and spontaneous crystal transformation, the material’s interface structure and electrochemical performance were synergistically enhanced. The resulting Co3O4@C-MNF composite electrode achieved a mass-specific capacitance of 310 F g–1 at 0.5 A g–1, with good rate performance (250 F g–1 at 10 A g–1) and low interfacial resistance (∼51 Ω). A symmetric supercapacitor device constructed with the modified material exhibited a maximum energy density of 4.94 Wh kg–1, high cycling stability (94.2% capacity retention after 8000 cycles), and stable output in various bending states. These results highlight the potential of the device for flexible, wearable energy storage applications and provide an approach and material system for the design of high-performance flexible supercapacitors.

Ag@SnO2/CsPbBr3 nanocomposite gas sensor for well-behaved low-concentration ethanolamine sensing at room temperature

Xu Xiaoli,Jiang Hongtao,Liu Wangwang,Wang Shengyi,Wang Xiaoping,Wang Mengyu,Ma Wei,Ma Shuyi,Wei Jinsha

It is a novel-effective process for realizing high-efficiency sensing and continuous gas monitoring by introducing precious metals into metal–oxide–semiconductors (MOSs). In this study, Ag is exploited to prepare surface functionalized SnO 2 nanoparticles (NPs) and innovative x Ag@SnO 2 /CsPbBr 3 , activating and catalyzing the gas sensing reactions on semiconductors. The results show that the precious metal Ag NPs promote the directional transport of carriers, thus improving the gas sensing performances. In addition, innovative x Ag@SnO 2 /CsPbBr 3 composites originated from Ag@SnO 2 NPs and 3-mercaptopropionic acid treated all-inorganic perovskite CsPbBr 3 are constructed to further accelerate electron transfer on heterointerfaces, enabling continuous and efficient monitoring of ethanolamine (EA) at room temperature. The sensing properties of Ag@SnO 2 /CsPbBr 3 on various volatile organic compounds are investigated. Compared with pure CsPbBr 3 , the EA response of as-prepared 2Ag@SnO 2 /CsPbBr 3 is obviously improved by about sevenfold. The response/recovery time is greatly shortened, besides the good stability. Another interesting result for x Ag@SnO 2 /CsPbBr 3 is the lower limit of detection of 44.43 ppb. The work demonstrates that Ag modification facilitates the adsorption/desorption rate and the response. Furthermore, the catalytic activation of noble metal Ag NPs and the synergistic interaction of SnO 2 /CsPbBr 3 nano-heterojunctions promote EA sensing performances at room temperature.

A Two-Stage Functional Nanomaterial Utilized for Ethanolamine Scavenging and Formaldehyde Detection via the AILE Mechanism

Shuo Zhu,Ruiqi Cui,Sicong Liu,Weihao Chen,Shouhui Huang,Genbao Zhu,Meng Liu,Jutao Sun,Lili Li,Xinlong Pang

Based on the principle of intermolecular interactions of the aggregation-induced locally excited emission (AILE) luminescence mechanism, two-stage functional conjugated polymers (CPs) capable of scavenging ethanolamine (ETA) and nanoprobes with detecting formaldehyde (FA) were designed and developed. The two-stage functional PFOP-NEt3(+)-based nanomaterial is simple to synthesize, easy to use, versatile, atom-economical, photostability, and biocompatible. In the first stage, conjugated polymers can process and stabilize the water pollutant ethanolamine. In the second stage, the nanoparticles formed by self-assembling conjugated polymers with ethanolamine can produce specific and sensitive responses to formaldehyde. They can detect formaldehyde in normal and cancer cells. This two-stage functional material, which has a high atom economy, is expected to be a specific detection probe for formaldehyde in vivo and ex vivo and can remove ethanolamine from aqueous environments and cells.