SEPARATION SCIENCE AND TECHNOLOGY
·
2019
·
IF 1.354
Mei Wang,Na Rao,Yuqing Liu,Jiale Li,Qunpeng Cheng,Jianfen Li
TETA or TETA-AEP mixtures were used as an activator to enhance CO2 capture in the MDEA solution. The effect of amount and type of activators, and the viscosity of absorbents on CO2 capture were discussed. The results showed that the positive effect of TETA-AEP mixtures on CO2 capture in the MDEA solution was greater than that of TETA. The optimal absorbent was No. V, whose CO2 absorption capacity/desorption efficiency was 3.08 times/1.18 times of No. І. The viscosity had a little influence on CO2 absorption and an obvious effect on CO2 desorption.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2018
·
IF 9.89
Desheng Pan,Yong Li,Zheng Han,Bing Li,Chinwei Wang,Teng Yang,Da Li,Chuljin Choi,Zhidong Zhang
Incorporation of distinct organic molecules and inorganic fragments into a single crystalline lattice of organic–inorganic hybrid magnets has aroused much attention for novel physical properties and applications. Yet, there has been no report on the discovery of ordered organic–inorganic hybrid magnets with room-temperature magnetism. Here, we report a simple chemical solution method for synthesis of new organic–inorganic hybrid magnets built by organic Fe(teta)1.5 and inorganic FeSex segments. By changing the reaction temperature, the size of these hybrid nanostructures can be tuned from 100 nm to 4 μm, and their shapes vary from nanoparticles and nanobelts to nanoplates. Selected area electron diffraction and X-ray diffraction reveal that hybrid (β-Fe3Se4)4[Fe(teta)1.5] nanoplates are a single phase in a tetragonal crystal structure with the space group I4cm (108). The thermal magnetic curve between 5 and 900 K was characterized using a vibrating sample magnetometer, revealing room-temperature ferrimagnetism of the (β-Fe3Se4)4[Fe(teta)1.5] nanoplates with the Curie temperature (TC) higher than 530 K. In the case of hybrid nanoplates synthesized at 483 K, a giant coercivity value reaching 11 kOe is obtained at 5 K. Our study not only provides guidance for developing a chemical solution method for controllable fabrication of a new class of organic–inorganic hybrid materials but also enhances the magnetic ordering temperature of such magnetic organic–inorganic hybrid materials to be higher than room temperature.
研究领域:
材料科学
·
物理化学
·
磁学
✓ 已验证
产品关联
DOI
高影响因子
Greenhouse Gases-Science and Technology
·
2022
·Vol. 12
·期 3
·362-375
·
IF 2.518
Jinxiu Li,Yu Li,Chen Li,Rui Tu,Pengfei Xie,Yi He,Yao Shi
While nonaqueous organic-amine absorbents have great potential in reducing energy consumption of CO 2 capture, their absorption/desorption behaviors are still poorly understood when high-concentration polyamines are used. On the other hand, large scale CO 2 capture demands the use of high-concentration polyamines absorbents. Therefore, we investigated the absorption and microwave regeneration behavior of high-concentration triethylenetetramine (TETA) in three typical organic solvents, including polyethylene glycol 200 (PEG200), diethylene glycol (DEG), and ethylene glycol (EG). The results showed that high-concentration TETA nonaqueous absorbents demonstrate advantages in absorption rate and regeneration energy consumption. The average absorption rate of 2.0 and 5.0 mol/L TETA/EG was 2.84 and 4.70 times that of 0.6 mol/L, respectively. The energy consumption of TETA/EG and TETA/DEG decreased by 29.4 and 25.6% as the concentration increased from 0.6 to 5.0 mol/L. In addition, the high-concentration TETA/PEG200 absorbent demonstrated observable tolerance for water vapor, which usually exists in flue gas. Results also showed that microwave regeneration was superior to conventional conduction heating especially when high-concentration TETA/PEG200 absorbent were used. The energy consumption of microwave regeneration of the absorbent with a concentration of 0.6, 2.0, and 5.0 mol/L was reduced by 65.9, 81.2, and 86.0%, respectively when compared with conduction heating. © 2022 Society of Chemical Industry and John Wiley & Sons, Ltd.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Fan Wang,Lijuan Zhang,Yeying Wang,Xijian Liu,Sohrab Rohani,Jie Lu
The graphene oxide (GO) functionalized by Fe 3 O 4 @SiO 2 @CS-TETA nanoparticles, Fe 3 O 4 @SiO 2 @CS-TETA-GO, was firstly fabricated in a mild way as a novel adsorbent for the removal of Cu(II) ions and methylene blue (MB) from aqueous solutions. The magnetic composites showed a good dispersity in water and can be conveniently collected for reuse through magnetic separation due to its excellent magnetism. When the Fe 3 O 4 @SiO 2 @CS- TETA-GO was used as an absorbent for the absorption of MB and Cu(II), the adsorption kinetics and isotherms data well fitted the pseudo-second-order model and the Langmuir model, respectively. Under the optimized pH and initial concentration, the maximum adsorption capacity was about 529.1 mg g −1 for MB in 20 min and 324.7 mg g −1 for Cu(II) in 16 min, respectively, exhibiting a better adsorption performance than other GO-based adsorbents reported recently. More importantly, the synthesized adsorbent could be effectively regenerated and repeatedly utilized without significant capacity loss after six times cycles. All the results demonstrated that Fe 3 O 4 @SiO 2 @CS-TETA-GO could be used as an excellent adsorbent for the adsorption of Cu(II) and MB in many fields.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2020
·
IF 6.785
Shaoyu Lu,Jingjing Du,Zhenli Sun,Chuanyong Jing
Antibiotic resistance genes (ARGs) have become emerging environmental contaminants, and the effective on-site detection of ARGs is urgently needed. Herein, we constructed a hairpin-structured magnetic sensor for the analysis of a widespread ARG, tetA, using surface-enhanced Raman scattering (SERS). The SERS sensor was assembled by immobilizing core-satellite structured Fe3O4@SiO2-Au with single-stranded DNA in a folded hairpin structure. The SERS sensor exhibited good sensitivity and specificity for the detection of laboratory-synthesized tetA ssDNA fragments. In addition, this SERS strategy is the first of its kind to be employed for monitoring environmental samples in the field, with a limit of detection reaching as low as 25 copies μL–1. Univariate and multivariate linear regression equations verify the practicability of the SERS sensor for quantitative tetA determination, showing the prospect for an amplification-free alternative platform for sensitive and reliable on-site detection of ARGs in the environment.
研究领域:
环境科学
·
分析化学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 56
·84903-84915
·
IF 5.19
Zhao Shujie,Wang Yongqiang,Zhu Kaili,Zhao Dongfeng,Song Qingbin
Currently, biphasic solvents are receiving more attention for CO 2 capture due to their energy-saving potential. Whereas, most of the current biphasic solvents still suffer from high viscosity and low regeneration efficiency. To solve this problem, a novel tri-solvent biphasic solvent triethylenetetramine (TETA)-2–amino–2–methyl–1–propanol (AMP)-1-dimethylamino-2-propanol (1DMA2P) was proposed in this study, and its absorption properties, viscosity changes, desorption properties, recyclability capacity, and reaction mechanism were explored. The results showed that the CO 2 absorption load showed a trend of firstly increasing and then decreasing with the increase of AMP concentration. Although the volume of the rich phase increased with increasing AMP concentration after the absorption, it also decreases the viscosity growth. The viscosity of the solution decreased from 498 mPa•s to 91 mPa•s. During the desorption process, the maximal desorption rates of AMP-containing solvents is significantly greater than that of 2 mol/L (M) TETA + 2 M 1DMA2P (2T2D). Simultaneously, the recyclability capacity of the AMP-containing solvents were also significantly higher than that of 2T2D. The regeneration efficiency of 1.5 M TETA + 0.5 M AMP + 2 M 1DMA2P (1.5T0.5A2D) was 81.92%. It was concluded by 13 C NMR analysis that amino groups in TETA and AMP can react with CO 2 to form carbamates and carbonates. Since AMP in the biphasic solution can generate free protons through various pathways during the desorption process, it promotes the decomposition of TETA-carbamate. This process achieves the deep stripping of CO 2 in biphasic solvent. Overall, TETA-AMP-1DMA2P solution is a promising energy-saving candidate for industrial CO 2 capture due to its competitive absorption–desorption performance and low viscosity.
研究领域:
化学工程
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环境科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Lingchao Kong,Qinyu Wang,Yeyin Zhang,Yi Wang,Chunmiao Zheng
The rapid expansion of the textile dyeing industry has created an urgent need for high-performance dye wastewater treatment materials due to the limitations of traditional adsorbents in efficiency and separability. Herein, we report the synthesis of ultralight, cost-effective aerogel adsorbents by introducing triethylenetetramine (TETA) into α-cellulose (CU). The resulting CU/TETA-0.25 aerogel displays outstanding adsorption capacities for Congo Red and indigo dyes, reaching 575.7±20 mg/g and 516.4±20 mg/g, respectively. Remarkably, less than 1 g of this aerogel continuously filters over 35 L (50 mg/L) of deeply colored red–blue dye wastewater to near transparency. Its high adsorption efficiency remains stable even under simultaneous exposure to multiple ions, organic compounds, and pH fluctuations. Mechanistic insights, derived from SEM, EDX, and XPS analyses and first-principles calculations (including molecular structure optimization, frontier molecular orbital distribution, weak interaction, and charge density difference), confirm that the –OH and –NH₂ groups on CU/TETA-0.25 drive dye adsorption through hydrogen bonding, supplemented by electrostatic and van der Waals interactions. Owing to its mass-producibility, lightweight nature, and low cost, CU/TETA-0.25 holds great promise for large-scale applications in mitigating water pollution caused by mixed dyes.
研究领域:
环境科学
·
材料工程
·
吸附技术
·
计算化学
·
废水处理
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Yunlei Shi,Dazhen Xiong,Zhiyong Li,Huiyong Wang,Jikuan Qiu,Hucheng Zhang,Jianji Wang
In recent years, metal–organic frameworks (MOFs) have been explored as emulsifiers for the fabrication of Pickering emulsions and then used for hybrid material synthesis and interface catalysis. Nevertheless, stimuli-responsive Pickering emulsions stabilized by MOFs have been rarely reported so far, although they are of great importance for fundamental research studies and practical applications. Herein, for the first time, triethylenetetramine (TETA)-functionalized MOFs (ZIF-90/TETA) have been designed, synthesized, and used for fabricating CO2-/N2-response Pickering emulsions. It is shown that even at the ZIF-90/TETA content of 0.25 wt %, the functional MOF can still efficiently emulsify n-hexane and water to form a high internal phase Pickering emulsion. Importantly, the Pickering emulsion can be easily and reversibly switched between emulsification and demulsification by bubbling of CO2 and N2 alternatively at atmospheric pressure. The possible mechanism of the CO2/N2 switchable emulsion is investigated by zeta potential, water contact angle, interfacial tension, 13C NMR spectroscopy, and an optical microscope. It is found that the acid–base reaction of CO2 with TETA anchored on the surface of ZIF-90 leads to the production of hydrophilic ammonium bicarbonate and carbamate, which results in the emulsification of the Pickering emulsion. However, when N2 is bubbled to remove CO2, the reverse reaction takes place to cause the demulsification of the Pickering emulsion. Moreover, the CO2/N2 switchable Pickering emulsion has been successfully used as a microreactor for Knoevenagel reactions to demonstrate a highly efficient integration of chemical reaction, product separation, and ZIF-90/TETA recycling for a sustainable chemical process.
研究领域:
化学
·
材料科学
·
胶体科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLID STATE SCIENCES
·
2017
·
IF 1.811
Yisong Wang,Tao Du,Yanli Song,Shuai Che,Xin Fang,Lifeng Zhou
ZSM-5 type zeolite with mesoporous structure was prepared and then amine-functionalized with tetraethylenepentamine (TEPA) by wet impregnation method to form a series of CO 2 adsorbents (ZTx). The structural properties of ZSM-5 and ZTx were characterized by XRD , FTIR , TGA/DTG, nitrogen adsorption/desorption, SEM and EDX techniques. The adsorption capacity of the adsorbents with different amine loading was measured at a temperature from 40 to 100 °C and the adsorption capacity of ZT7 was 1.80 mmol/g at 100 °C. The adsorption process and mechanism were studied by fitting the experimental data used the three adsorption kinetic models, and a complex physical and chemical mixing process was produced as the amine entered the surface and pore size of the zeolite. The high adsorption selectivity at 10% CO 2 concentration and the stability of the five adsorption desorption cycles indicated that ZT7 is a suitable and promising CO 2 adsorbent for the purification of industrial flue gas .
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 42
·期 1
·420-428
·
IF 3.269
Fenglei Liu,Shuoyu Wang,Guorong Lin,Shuixia Chen
A hyper-cross-linked resin (PDVBpc) based solid amine adsorbent was synthesized by suspension polymerization of divinylbenzene (DVB) and a Friedel–Crafts alkylation reaction, followed by impregnation with tetraethylenepentamine (TEPA), for CO2 capture. The results showed that the specific surface area and pore volume of the initial porous polymer (PDVB) remarkably increased after the Friedel–Crafts alkylation reaction, which was beneficial for increasing the loading of TEPA and the adsorption of CO2. To determine the CO2 adsorption performance, certain factors, including the TEPA loading, flow rate, CO2 concentration and adsorption temperature, were investigated. The maximum adsorbed amount of CO2 (3.11 mmol g−1) was achieved at 25 °C and a CO2 concentration of 10 vol% when the flow rate was 30 mL min−1 and the TEPA loading was 30 wt%. The optimal TEPA loading could provide sufficient active sites for CO2 capture, whereas excessive loading may lead to aggregation of the adsorbent and blockage of pore channels. An increase in temperature was unfavourable for the adsorption of CO2, because the reaction between amine groups and carbon dioxide was exothermic. A high CO2 concentration would reduce the breakthrough time but would not affect the adsorption capacity for CO2. The experimental data fitted the Avrami model well at different temperatures, which indicated that both physisorption and chemisorption contributed to the adsorption of CO2. Thus, a promising material for the adsorption of CO2 was obtained via the functionalization with TEPA of a hyper-crosslinked resin.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2019
·
IF 7.149
Lidong Wang,Shanshan Liu,Rujie Wang,Qiangwei Li,Shihan Zhang
Biphasic solvents containing mixed amines have a phase separation behavior and energy-efficient regeneration for CO2 capture. However, the trade-off between the CO2 absorption capacity and the volume ratio of the CO2-rich phase presents a critical challenge to the reducing potential in regeneration energy consumption. In this study, sulfolane was proposed to regulate the phase separation behavior of a N,N-diethylethanolamine (DEEA)–triethylenetetramine (TETA) biphasic absorbent by simultaneously decreasing the volume ratio and increasing the CO2 loading of the rich phase, without sacrificing the high CO2 capacity. In the DEEA–TETA–sulfolane biphasic absorbent, sulfolane acted as a phase splitter and physical activator. The replacement of a part of H2O by hydrophobic sulfolane contributed to a substantial decrease in the volume ratio of the rich phase from 83 to 39% and an increase in CO2 loading of the rich phase from 3.10 to 4.92 mol/L. The regeneration heat decreased to 1.81 GJ/t CO2, 26.4% less than DEEA–TETA, and 54.6% less than the 5 M monoethanolamine system. Moreover, by promoting the mass transfer coefficient of CO2 in DEEA–TETA–sulfolane to 1.8 times the original DEEA–TETA system, sulfolane was validated as a physical activator. Our study provides a promising strategy for regulating the phase separation behavior of biphasic solvents and enhancing the regeneration energy efficiency for CO2 capture.
研究领域:
化学工程
·
碳捕集与封存
·
分离科学
·
能源效率
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2016
·
IF 4.836
Beini Gong,Pingxiao Wu,Zhujian Huang,Yuanyuan Li,Shanshan Yang,Zhi Dang,Bo Ruan,Chunxi Kang
The potential application of triethylenetetramine intercalated montmorillonite (TETA-Mt) in mine tailings treatment and AMD (acid mine drainage) remediation was investigated with batch experiments. The structural and morphological characteristics of TETA-Mt were analyzed with XRD, FTIR, DTG-TG and SEM. The inhibition efficiencies of TETA-Mt against heavy metal release from mine tailings when exposed to acid rain leaching was examined and compared with that of triethylenetetramine (TETA) and Mt. Results showed that the overall inhibition by TETA-Mt surpassed that by TETA or Mt for various heavy metal ions over an acid rain pH range of 3–5.6 and a temperature range of 25–40 °C. When mine tailings were exposed to acid rain of pH 4.8 (the average rain pH of the mining site where the mine tailings were from), TETA-Mt achieved an inhibition efficiency of over 90% for Cu 2+ , Zn 2+ , Cd 2+ and Mn 2+ release, and 70% for Pb 2+ at 25 °C. It was shown that TETA-Mt has a strong buffering capacity. Moreover, TETA-Mt was able to adsorb heavy metal ions and the adsorption process was fast, suggesting that coordination was mainly responsible. These results showed the potential of TETA-Mt in AMD mitigation, especially in acid rain affected mining area.
研究领域:
环境地球化学
·
环境污染与修复
·
矿物材料学
·
环境工程
·
土壤化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）