JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2018
·
IF 2.196
Along Wang,Yuting Chu,Tahir Muhmood,Mingzhu Xia,Ying Xu,Lei Yang,Wu Lei,Fengyun Wang
The remediation of wastewater containing Pb2+ has attracted much attention due to the harm of Pb2+ to the environment and human health. A promising adsorbent, functionalized montmorillonite modified with a ligand diethylenetriamine (DETA) was prepared under mild reaction conditions. The modified montmorillonite (DETA-MMT) and nature montmorillonite (Na-MMT) were then characterized with the help of XRD, FTIR, TG/DTG, and BET. It was revealed that the modifier DETA was successfully inserted into interlayers of montmorillonite, as demonstrated by the characterizations. Batch adsorption experiments of Pb2+ onto Na-MMT and DETA-MMT in solutions were studied as a function of various parameters, such as pH, contact time, initial concentration, and temperature. The maximum adsorption capacity of DETA-MMT was 61.1 mg g–1, which had more than doubled compared with that of Na-MMT. The adsorption thermodynamics of Pb2+ by DETA-MMT was studied, and it showed a endothermic process. The adsorption kinetics of two samples both fit well with the pseudo-second-order model. The adsorption isotherms of Na-MMT and DETA-MMT can be well described by the Langmuir isotherm and Freundlich isotherm, respectively. Furthermore, the adsorbed Pb2+ onto DETA-MMT can hardly be dissolved under weak acidic condition (pH >4) according to the desorption experiments of simulated acid rain and Tessier’s sequential extraction procedure.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 54
·48810-48815
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IF 3.289
Ge Yang,Jianxi Zhao
A reverse aggregate system composed of oleic acid and diethylenetriamine in cyclohexane has been studied. Small angle X-ray scattering (SAXS) measurements and polarising microscopy (POM) observations suggested the formation of reverse vesicles. FT-IR measurements showed simple attraction between DETA and OA, which increased the size of the head of the forming unit and resulted in reverse vesicle formation. Therefore, the viscosity of solutions depended on the mole ratios of DETA to OA,β, and reached a maximum of 122 Pa s at β = 1 for 1 mol L−1 OA. Dynamic oscillatory sweeps were carried out for this system of equi-mole mixed OA (1 mol L−1) and DETA. Strong elasticity was observed, where the elastic modulus (G′) always dominated over the viscous modulus (G′′) over the range of examined frequencies. The elastic plateau modulus G′P was 127.4 Pa and G′P was found to decrease exponentially with temperature. Strain sweeps exhibited a strain-softening response at high strains. The effect of trace amounts of water was also examined for equi-mole mixed OA (1 mol L−1) and DETA, where the reverse vesicles remained. The water was found to improve the association of DETA with OA and increase the visco-elasticity of the solution. The maximum viscosity was as high as 6005 Pa s at W0 = 6, and G′P also reached 530 Pa. The solution became gelatinous in appearance.
研究领域:
化学
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材料科学
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2025
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IF 5.2
Ye Wang,Jingxiao Zhang,Hongrui Zhang,Xianbin Zheng,Xingshuo Zhang,Xingshuo Zhao,Lilei Zhang
This study investigates the thermodynamic properties and intermolecular hydrogen transfer behavior in binary mixtures of 1,2-propanediol (1,2-PD) and diethylenetriamine (DETA). Experimental measurements of density, sound velocity, and viscosity reveal significant interactions between the hydroxyl group of 1,2-PD and the amino group of DETA, leading to non-ideal mixing behaviors. The excess molar volumes, apparent molar volumes, and viscosity deviations show clear evidence of intermolecular hydrogen bonding. Theoretical calculations using density functional theory (DFT) further support the formation of hydrogen bonds, with optimized molecular structures and pathways confirming a concerted hydrogen transfer mechanism. The study identifies the pathway for hydrogen transfer and provides insights into the thermodynamic and structural changes occurring in this mixture. These findings enhance our understanding of hydrogen transfer processes between alcohol and amine and offer valuable knowledge for the design of materials with tailored properties in industrial and research applications.
研究领域:
物理化学
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材料科学
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DOI
高影响因子
Royal Society Open Science
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2018
·Vol. 5
·期 9
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IF 2.504
Juncai Zhang,Youning Chen,Wei Zhao,Yuhong Li
The surface-initiated atom transfer radical polymerization method was used to graft glycidyl methacrylate (GMA) on chloromethylated cross-linked styrene-divinylbenzene resin, and then the novel diethylenetriamine-functionalized resin was prepared through the amination reaction between amino group of diethylenetriamine and epoxy group in GMA. The adsorption properties were evaluated with As(V). The adsorption of As(V) was mainly regarded as the electrostatic interaction between the adsorbent and the adsorbate by analysing the relationship between adsorption capacity with the solution pH, adsorption isotherm and adsorption kinetics. The maximum sorption capacity of As(V) was 5.25 mmol g−1. The adsorption isotherms of As(V) were best described by the Langmuir model, and its adsorption kinetics followed the pseudo-second-order kinetic equation. The adsorption of As(V) ions was hardly affected by common coexisting ions such as Na(I), K(I), Ca(II) and Mg(II), whereas it was slightly decreased when Fe(II) and Zn(II) coexisted in the solution, which illustrates the selective adsorption of As(V) from wastewater. Ten adsorption–desorption cycles demonstrated that the resin possessed high recycling efficiency and stability and was suitable for efficient removal of metal ions from aqueous solution.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
COLLOID AND POLYMER SCIENCE
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2022
·Vol. 300
·期 9
·1017-1025
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IF 2.434
Li Jiawei,Shao Xiaoming,Zhang Bo,Wang Zongzheng,Ye Xin,Zhang Liqun,Wang Wencai
We report a simple strategy for improving the hydrophilicity of carbon black. Tannic acid (TA) and diethlyenetriamine (DETA) were employed to co-deposit on the surface of CB via immersing the CB in an alkaline TA and DETA solution with gently stirring at room temperature. The surface chemistry characteristics and hydrophilic of CB are investigated. The results suggest that a poly (tannic acid/diethlyenetriamine) (TA/DETA) layer with abundant hydrophilic groups such as hydroxyl and amino groups was successfully deposited on the surface of CB. Results of static contact angle indicate that the water contact angle is as low as 32°, which presents the excellent hydrophilicity of the modified CB. Graphical abstract The deposition process of TA and DETA on the surface of carbon black.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2019
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IF 2.298
Daofan Ma,Chunying Zhu,Taotao Fu,Xigang Yuan,Youguang Ma
The experimental values of density and viscosity for binary solutions diethylenetriamine (DETA) + H2O, DETA + N,N-diethylethanolamine (DEEA), and ternary solution DETA + DEEA + H2O over the entire concentration range were reported at atmospheric pressure and T = (293.15, 303.15, 313.15, 323.15, 333.15) K. The measured densities and viscosities were used to calculate the thermal expansion coefficient, excess molar volume, partial molar volume, apparent molar volume, partial molar volume at infinite dilution, viscosity deviation, and excess Gibbs free energy of activation for viscous flow. The molecular interactions in mixtures were discussed based on the volumetric and viscometric properties.
研究领域:
物理化学
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分子科学
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DOI
高影响因子
Journal of Water Process Engineering
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2022
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IF 7.34
Wen Huang,Xueping Zhang,Yaxin Tang,Jinqi Luo,Jiao Chen,Yixin Lu,Lin Wang,Ze Luo,Jianqiang Zhang
In this study, waste corn cobs were oxidized and grafted with diethylenetriamine (DETA), which chelates a large amount of Fe 3+ . Then, nitrogen-doped zero-valent iron/biochar (ZVI/BC-N) was prepared using a simple carbothermal reduction method. ZVI/BC-N had a larger specific surface area and porous structure due to the irregular folding phenomenon on its surface caused by Fe and N codoping. At the same time, ZVI/BC-N contained more ZVI reactive crystals due to DETA chelation. The pseudo-second-order and Elovich models better describe the behavior of ZVI/BC and ZVI/BC-N in phosphorus adsorption, where the adsorption process was controlled by a combination of the reaction rate and diffusion. The isotherm and thermodynamic fitting results showed that the adsorption of phosphorus by ZVI/BC was a single-molecular-layer physical adsorption process, while ZVI/BC-N exhibited multimolecular layer chemisorption , and the maximum amounts of phosphorus adsorbed by ZVI/BC and ZVI/BC-N were 17.93 and 82.78 mg·g −1 , respectively. X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) spectroscopy showed that both C N and C H on biochar were involved in the adsorption process, while the coordination between OH, C O and phosphate, the adsorption of ZVI and chemical processes were the main mechanisms of phosphorus removal. The stronger adsorption performance of ZVI/BC-N compared to ZVI/BC might be related to its high ZVI content and rich surface structure. This study aims to provide a method for the preparation of biochar composites with a high ZVI content through simple modifications and provide a new approach for the efficient removal of phosphorus from water.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2022
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IF 5.477
Yanwei Dong,Qinze Liu,Tingting Gao,Xian Zhang,Jinshui Yao,Changbin Zhang
Background: In order to remedy the pollution of chromium(VI), it is of great significance to develop high-efficiency adsorbents. Methods: Heren, excellent adsorbents poly(polyethyleneimine-tannin-diethylenetriamine) (PPTD) were synthesized using a simple route and utilized for the removal of Cr (VI) from aqueous solutions. The effect of various factors on the adsorption behavior of PPTD was studied, such as polyethyleneimine content, temperature, initial pH, initial concentration, adsorbent dosage, contact time, and foreign ions. The optimized experiments were performed under the conditions of polyethyleneimine content (35%), temperature (30 °C), initial pH (2), initial concentration (200 mg L −1 ), and contact time (24 h) using 25 mg PPTD to remove Cr(VI) for 100 mL solution. Significant Findings: The results not only showed rapid removal efficiency which is close to 100% at low concentrations (20∼120 mg L −1 ), but also exhibited favorable selectivity for Cr (VI) even in the presence of coexisting ions (such as Cl − , Cd (II), and Cu (II)). Its maximum capacity reached the value of 757.6 mg g −1 at 30 °C, which was close to the experiment data (751.6 mg g −1 ). Besides, the adsorption behavior of Cr (VI) can be described by the pseudo-second-order kinetic model and the Langmuir isothermal model. Following satisfactory fitting with the Langmuir isotherm model.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 15
·e55222
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IF 2.7
Haihua Wang,Yun Han,Xuan Liu,Liyu Sun,Huizhu Niu,Yifan Du,Jie Wang
In lithium-ion batteries (LIBs), separator is used to provide a barrier between the anode and cathode and provide freedom for the transport of lithium-ions, which serves a key function in inhibiting internal short circuit and improving the battery safety. The limited wettability of commercial polyolefin separators in electrolytes restricts its utilization in extreme environmental conditions. In our work, we choose polypropylene (PP) as the precursor and can address the issue of poor wettability through suitable modification methods. Tannic acid (TA) and diethylenetriamine (DETA) were utilized to coat PP separator via hierarchical self-assembly approach, and the coating is further stabilized by taking advantage of the specific oxidizing properties of sodium periodate. This method scarcely increases the separator thickness or sacrifices the microporous structure of the original separator. The improved separator not only exhibits outstanding wetting capability and relatively high ion conductivity (1.24 mS cm −1 ), but also has the highest lithium-ion migration number of 0.74. This indicates that when the modified separator is applied to LIBs, its electrochemical performance is significantly enhanced. The enhancement in electrochemical performance of LIBs is attributed to the strong absorption and retention ability of the coating on the separator. The reversible capacity of Li/PP-TD2 separator/LiFePO 4 battery is 144.3 mAh g −1 at 2C, which is higher than that of PP separator (117.1 mAh g −1 ) under the same current density. Even after 200 cycles, the PP-TD2 separator with two-layer assembly modification still maintains a higher coulombic efficiency of 97.55% and a discharge capacity of 96.6%. This hierarchical self-assembly modification of PP provides an effective approach for fabricating high-performance separator.
研究领域:
材料科学
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电化学
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能源技术
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Taiping Hu,Kai Dai,Jinfeng Zhang,Shifu Chen
Step-scheme (S-scheme) photocatalytic system has been considered as an effective method for solar energy conversion by utilizing broadband solar energy, realizing easy separation of photoexcited carriers and strong redox ability. Herein, the novel ternary Ni 2 P cocatalysted two-dimensional (2D)/2D SnNb 2 O 6 /CdS-diethylenetriamine (SNO/CdS-D) system was designed and fabricated. The S-scheme SNO/CdS-D heterostructure gives photocatalytic hydrogen production of 7808 μmol g −1 h −1 , which is about 130.13 and 2.35 times stronger than that of SNO and CdS-D. Further, noble-metal-free Ni 2 P cocatalyst is decorated into SNO/CdS-D heterostructure, the photocatalytic hydrogen evolution performance could be enhanced to 11,992 μmol g −1 h −1 . Additionally, XPS analysis and DFT calculation revealed the carriers moves from CdS-D to SNO and then to Ni 2 P in the Ni 2 P-SNO/CdS-D nanocomposite. This work will give a reliable and clear insight into the interface and surface design of the 2D catalysts and offer a broadband photocatalytic hydrogen evolution process without noble metal cocatalysts.
研究领域:
材料科学
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能源化学
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光催化
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2015
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IF 2.711
Xi Zhang,Peng-Fei Ren,Hao-Cheng Yang,Ling-Shu Wan,Zhi-Kang Xu
We report a novel approach toward the surface modification of commercial polymer membranes via co-deposition of tannic acid (TA) and diethlyenetriamine (DETA). Particle-free, superhydrophilic, and almost colorless coatings are fabricated on the surfaces of polypropylene, poly(vinylidene fluoride), and poly(tetrafluoroethlene) microfiltration membranes. Cross-linking between TA and DETA plays a crucial role during the co-deposition process, as well as the adhesion of TA on the hydrophobic membrane surfaces. Both the surface wettability and water permeation flux are dramatically improved for the studied membranes after the co-deposition. The results indicate that co-deposition of TA and DETA is great potential for the surface modification of hydrophobic membranes.
研究领域:
材料科学
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表面化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Yunlan Liu,Dan Ding,Yanfeng Lu,Yu Chen,Ying Liao,Guangxian Zhang,Fengxiu Zhang
A halogen-free, highly efficient, and durable flame retardant containing both phosphonate and ammonium phosphonate groups, ammonium salt of diethylenetriamine pentamethylene phosphonate glycol ester (ADTPMPAEG), was synthesized and applied to cotton fabrics by surface grafting modification. Fourier-transform infrared spectroscopy (FT-IR) and energy-dispersive X-ray spectroscopy (EDS) analyses indicated that ADTPMPAEG was grafted onto the surface of cotton fiber by a P–O–C covalent bond . The limiting oxygen index (LOI) of ADTPMPAEG-treated cotton with 18.92% weight gain was 45.1%, and after 50 laundering cycles (LCs), the LOI was 32.7%. Thermogravimetric analysis , conical calorimetry , and vertical combustion measurements revealed that treated cotton possessed outstanding flame retardancy and excellent durability. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) results showed that ADTPMPAEG had little influence on the surface morphology and crystal structure of cotton fibers. It was observed that ADTPMPAEG had no obvious effect on the mechanical properties of the cotton fabrics.
研究领域:
材料科学
·
纺织工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）