INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
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IF 4.939
Xintong Li,Xianglin Wang,Min Li,Junhong Luo,Yongtao An,Peilong Li,Jiangfeng Song,Changan Chen,Xingwen Feng,Shuai Wang
Deuterium has numerous applications in industry and scientific research. However, the conventional methods for separation hydrogen isotopes face the problems of low selectivity and high energy consumption. Recently, microporous material adsorption separation technology provides an efficient way for the separation of hydrogen isotopes. Herein, we prepared the metal bistriazolate framework Ni 2 Cl 2 BBTA, featuring a high density of coordinatively unsaturated Ni 2+ sites. Interactions between the open metal sites and hydrogen render this material excellent separation ability for the capture of D 2 from the hydrogen isotopes mixture, with the D 2 over H 2 selectivity up to 4.5 at 77 K and 4.0 at 87 K respectively. Notably, recycle experiments show that this material has great potential in the application of hydrogen isotope separation, owing to its good structural stability and reusability .
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Yanhua Liu,Yuanyue Li,Geoffrey I.N. Waterhouse,Chenchen Liu,Xiaohui Jiang,Zhiming Zhang,Liangmin Yu
A smart composite system based on thermosensitive polymers and photosensitive polyaniline (PANI) was constructed in this work, enabling efficient photo-driven adsorption and separation of anionic dyes within a short time. Thermosensitive copolymers (P(NIPAM-NVK)) of N -isopropylacrylamide (NIPAM) and N -vinylcarbazole (NVK) with adjustable low critical solution temperatures (LCST) were synthesized via a free radical copolymerization method. PANI was then composited with P(NIPAM-NVK) as a photothermal agent and dye adsorbent. The developed P(NIPAM-NVK)/PANI composite systems showed a rapid temperature increase under visible light irradiation, triggering the transition of P(NIPAM-NVK) from the sol state to a bulk gel state. Simultaneously, PANI and Congo Red (CR) anionic dye were efficiently encapsulated within the gel state of P(NIPAM-NVK) via intermolecular interactions, facilitating the rapid separation of aqueous CR through a direct solid–liquid process to yield clean water. The P(NIPAM-NVK 10 )/PANI 0.5 composite system afforded a removal efficiency > 98 % for CR (80 mg/L) within 5 min under visible light illumination. These findings hold great promise for the eco-friendly treatment of dye-containing wastewater.
研究领域:
材料科学
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环境科学
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高分子化学
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DOI
PubMed
高影响因子
Asia-Pacific Journal of Chemical Engineering
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2025
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IF 1.6
Shuai Yan,Xin Pu,Zhiyong Qi,Xiaoran Zhang,Xiaoyu Zhou,Xin Han,Lei Ye,Xinglong Qin,Jichang Liu
m -Cresol and p -cresol cannot be effectively separated using conventional distillation because of their proximate boiling temperatures. This study investigated the adsorption separation of cresol using the short b -axis ZSM-5 synthesized via a urea-assisted method. In contrast to the ellipsoidal HZSM-5, which was approximately 1 μm in length, the thickness of the sheet-like HZSM-5 decreased to 36 nm, resulting in an increase in total cresol adsorption capacity from 76 to 122 mg/g. Applying the CLD method, an increase in the TEOS:HZSM-5 ratio from 0 to 0.83 resulted in the increase in p -cresol adsorption capacity from 69 to 106 mg/g, while m -cresol adsorption capacity dropped from 53 to 12 mg/g. The adsorption selectivity significantly rose from 1.3 to 9.7. The adsorption kinetics and isotherms demonstrated that the process was exothermic for p -cresol and endothermic for m -cresol.
研究领域:
材料化学
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物理化学
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分离科学
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催化化学
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纳米材料
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
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2022
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IF 4.119
Bin Wang,Haifeng Cong,Xingang Li,Hong Li,Xin Gao
The recovery of levulinic acid (LA) and formic acid (FA) from aqueous solutions and actual biomass hydrolysates by using the stepwise adsorption method was investigated for the first time. The carbon molecular sieve was used as the adsorbent for FA and microporous activated carbon was used as the adsorbent for LA according to the steric hindrance effect of the pore channels and the difference in molecular diameter of FA and LA. The adsorption data of LA and FA onto their respective adsorbents were measured and numerically analyzed by adopting batch adsorption experiment and fixed-bed column methods. In the study of static adsorption equilibrium experiment, the Langmuir equation fitted the data of LA adsorption on activated carbon, while the Freundlich equation fitted well the adsorption data of FA adsorption on carbon molecular sieve. In the kinetic study, the LA adsorption on activated carbon and FA adsorption on carbon molecular sieve confirmed the PSO model. Moreover, the effect of various conditions on fixed-bed column adsorption progress was investigated, which indicated that the adsorption property improved with feed flow rate, column length, temperature decreasing and initial concentration increasing. The Yoon-Nelson model was adopted to predict and analyze the whole process of adsorption breakthrough and consistent well with the experimental data. The separation of LA and FA was realized by continuous fractional adsorption.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2021
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IF 3.498
Tian-Xiang Yan,Xiu-Juan Li,Le Chen,Zhi-Hui Zhang,Qun Chen,Ming-Yang He
Metal-organic frameworks (MOFs) with metal-containing secondary building units and organic linkers have great potential for the separation of isomers. A type of hybridized materials synthesized by in-situ growth of microporous zeolite imidazolate framework (ZIF-67) on siliceous mesoporous foam (MCF), ZIF-67@MCF, was synthesized and employed in the adsorption separation processes of the petrochemical industry. This study aims to present the adsorption behavior of ZIF-67@MCF for separating xylene isomers. The adsorption separation of xylene isomers on ZIF-67@MCF hybrid materials was studied using the batch vapor-phase adsorption, and liquid-phase breakthrough adsorption. ZIF-67@MCF showed a preferable adsorption of p -xylene over the other two isomers, with the adsorption strength order of p -xylene ( p X) > m -xylene ( m X) > o -xylene ( o X). In addition, the adsorption capacity of ZIF-67@MCF materials were studied with the different mole ratio of fluorine to silicon (F/Si = 0, 0.03, 0.06). The higher resolution and larger separation factors for p X/ o X and m X/ o X, and higher adsorption capacity make ZIF-67@MCF an efficient and reliable alternative adsorbent to the isolation protocols for xylene isomers in the petrochemical industry.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2023
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IF 5.9
Yong Zhu,Hailun Li,Huiran Jin,Jingrui Ma,Zhandong Ye,Bingmin Wu,Ying Zhang,Qingping Xiong,Shijie Ding,Jing Chen,Song Huang
Alkaloids are the most medicinally valuable ingredients in plant crop Coptis chinensis ( C. chinensis ). However, the separation of these small-molecule compounds is challenging because C. chinensis also contains a lot of impurities such as proteins and saccharides . Adsorption separation stands out in the field of biological separation by virtue of its efficiency and greenness. Here, this paper aimed to selectively separate the total alkaloids during extraction of C. chinensis by resorcinol-formaldehyde (RF) aerogel based on electrostatic interaction and size-sieving effect. First, RF aerogels with different surface area (40.6–674.9 m 2 /g) and pore size (2–25 nm approximately) were synthesized by adjusting the ratio of catalyst (C). The results of static adsorption showed that the optimum alkaloids selective separation was achieved at R/C of 10/1: alkaloids adsorption capacity ( Q e ), protein retention ratio ( Pr ), saccharides retention ratio ( Sr ) and the coefficient of selectivity were 487.93 mg/g, 87.40 %, 95.90 % and 2.23, respectively. Methanol containing 1 % hydrochloric acid was considered as the most suitable eluent with the desorption efficiency of 95.88 %. In addition, the adsorption process conformed to pseudo-second-order kinetics, intra-particle diffusion and Langmuir isotherm models, and was a spontaneous endothermic process. It was found from the dynamic adsorption experiment that the dynamic adsorption capacity was 497.81 mg/g, and the purity of total alkaloids increased from 39.19 % to 90.22 %. Compared with resin adsorption and salt precipitation method, RF aerogel separation could more efficiently separate the alkaloids from C. chinensis (the total alkaloids yield of 57.40 mg/g C. chinensis ). In addition, the alkaloids separated by RF aerogel had better antioxidant and antibacterial activities than that separated by salt precipitation method. In summary, RF aerogel separation was potential as an efficient and green method for the separation of total alkaloids from C. chinensis .
研究领域:
植物化学
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药物分离工程
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生物医学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Jiao He,Siyuan Zhang,Xinjian Cheng
Dendritic fiber nanosilica (DFNS) possesses a unique porous structure, and its potential application for adsorption and separation, particularly of heavy metals, should be explored. This study, to our knowledge, is the first time to introduce fluorescence recognition ability to DFNS and to combine it with polymer materials. Firstly, the fluorescent DFNS (FL-DFNS) was prepared by a Schiff base formation reaction between the naphthalamide fluorophore and the modified DFNS. Then, a two-step approach was employed to fabricate FL-DFNS/polyurethane (FL-DFNS/CSPU-02) nanocomposite materials. FL-DFNS functions as a “turn off” sensor for Hg 2+ /Hg + ions, exhibiting fluorescence quenching of up to 81.1 %/75.9 %. It also has an excellent adsorption capacity to mercury. Specifically, FL-DFNS/CSPU-02 membrane enabled portable detection of Hg 2+ /Hg + ions. Importantly, it exhibited superior performance in the adsorption and separation of Hg 2+ /Hg + ions, achieving a removal efficiency of 97.7 % and 98.0 %, with an absorption capacity of 382.4/373.5 µg/cm 2 . And it can be recycled for at least nine times. Overall, this study confirms the practical application value of FL-DFNS and FL-DFNS/CSPU-02 membrane in the recognition and removal of Hg 2+ /Hg + ions, it will achieve the real application in environmental science and engineering.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
Environmental Science-Nano
·
2016
·Vol. 3
·期 3
·670-681
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IF 5.896
Bo Chen,Yang Liu,Sijiang Chen,Xuesong Zhao,Wenli Yue,Xuejun Pan
In the present work, a facile, mild and reproducible chemical strategy, based on the glutaraldehyde crosslinking reaction, was explored to fabricate nitrogen-rich core/shell structured magnetic nanocomposites using hydrophilic polyethylenimine (PEI) as the nitrogen source. As expected, the obtained Fe3O4@NH2@PEI nanocomposites, with a magnetic core and polymeric shell, contain porous structures and N-rich groups, exhibiting extremely high stability and selectivity for adsorption and separation of anionic dyes from complex systems. Single-solute adsorption experiments indicated that the magnetic removal of alizarin red S (ARS) and methyl orange (MO) by Fe3O4@NH2@PEI was fast and forceful, and best fitted to a pseudo-second-order kinetic model, and followed Langmuir monolayer adsorption. Furthermore, the adsorbed dyes could be easily desorbed and the regenerated adsorbents could be reused without an obvious decrease of the adsorption capacity even after 15 consecutive adsorption–desorption cycles. In addition, owing to the high selectivity of Fe3O4@NH2@PEI toward anionic dyes, the model anions could be conveniently separated from a complex system containing anionic and cationic dyes and recycled back into the industrial process, effectively avoiding secondary pollution. More importantly, the as-prepared material could act as an efficient adsorbent for the model textile effluent, and the regenerated adsorbent could be successfully reused without a significant efficiency loss. The results of the present work are of great importance for practical applications of Fe3O4@NH2@PEI as a promising adsorbent for selective adsorption and separation of anionic dyes from industrial effluents.
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
ACS Applied Materials & Interfaces
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2021
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IF 9.229
Liping Yang,Hanbang Liu,Danhua Yuan,Jiacheng Xing,Yunpeng Xu,Zhongmin Liu
The separation of xylene isomers is one of the most challenging issues in the chemical industry because of the similarity of their boiling points and kinetic diameters. This study focuses on the use of pillar-layer MOF-Co(aip)(bpy)0.5 for adsorption and separation of xylene isomers. It was found that Co(aip)(bpy)0.5 exhibited a significant para-selectivity in liquid-phase competitive adsorption of xylene isomers, and the competitive separation factors reached as high as 30 for p-xylene versus m-xylene and 16 for p-xylene versus o-xylene. Desorption experiments further confirmed the preferential adsorption of p-xylene on the adsorbent. Molecular simulations and calculations revealed that the order of interaction strengths for xylene molecules and the adsorbent framework was p-xylene ≫ o-xylene ≈ m-xylene, which illustrated the selective adsorption phenomena arising from the mechanism for microscopic interactions. This work broadens the application of pillar-layer MOF materials in the field of xylene isomer adsorption and separation.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
Food Additives and Contaminants Part A-Chemistry Analysis Control Exposure & Risk Assessment
·
2018
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IF 2.129
Xue Wang,Hui-Ling Duan,Shi-Yao Ma,Jun Wang,Han-Ying Zhan,Zhi-Qi Zhang
A novel adsorbent, poly(sodium 4–styrenesulfonate) modified MIL-101(Cr)–NH2, was successfully prepared. Owing to its high surface area and degree of negative surface charge, it enables effective adsorption and separation of illegal cationic dyes, such as rhodamine B, pararosaniline, and auramine O, from foodstuffs prior to high performance liquid chromatography analysis. Under optimised conditions, good linearity was obtained over 1.0–80.0 or 1.0–120 ng mL−1 with a correlation coefficient (R2) > 0.999. Limits of detection and limits of quantification of the three dyes were 0.28–0.65 and 0.94–2.13 μg kg−1, respectively. The recoveries of the three dyes in shrimp powder, chili powder, tofu sheets, and tomato sauce were in the range of 86.8–119.3%, suggesting that the developed method is a promising tool for accurate quantification of the three dyes at trace levels in foodstuffs.
研究领域:
食品安全
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2018
·Vol. 93
·期 10
·2898-2905
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IF 2.587
Le Chen,Dan-Dan Zhu,Guo-Jian Ji,Sheng Yuan,Jun-Feng Qian,Ming-Yang He,Qun Chen,Zhi-Hui Zhang
Background Metal−organic frameworks (MOFs) are energy-efficient adsorbents for separating industrial chemical feedstocks. A type of MOF containing an extended porous network of γ-cyclodextrin (γ-CD) and alkali metal salts, CD-MOF, has potential applications in adsorption separation processes in the petrochemical industry. This study aims to present the adsorption efficiency of CD-MOF-1 in separating xylene regioisomers. Results The adsorption separation of xylene regioisomers on layered CD-MOF-1 microcrystals was studied using batch vapor-phase adsorption and liquid-phase breakthrough adsorption. CD-MOF-1 showed preferable adsorption of o -xylene over the other two isomers, with adsorption strength in the order o -xylene ( o X) > m -xylene ( m X) > p -xylene ( p X). With increased temperature, high adsorption capacities of o X and m X over p X were detected. However, this also resulted in a decrease of the separation factors of o X/ p X and m X/ p X. Conclusion The high resolution and large separation factors for o X/ p X and m X/ p X make CD-MOF-1 an efficient and reliable alternative adsorbent to the isolation protocols for xylene isomers currently used in the petrochemical industry. © 2018 Society of Chemical Industry
研究领域:
化学工程
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材料科学
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石油化工
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Chaohui He,Peng Zhang,Yong Wang,Yujuan Zhang,Tuoping Hu,Libo Li,Jinping Li
The selective removal of carbon dioxide (CO 2 ) from acetylene (C 2 H 2 ) is an important separation process in the petrochemical industry, but is challenging due to the similar physicochemical properties of the two gases. Using CO 2 -selective adsorbents that have preferential affinity for CO 2 over C 2 H 2 in pressure swing adsorption was deemed a promising separation method for the separation of CO 2 /C 2 H 2 mixtures. Herein, we report an ultramicroporous metal-organic framework, Y-bptc, to achieve efficient separation of CO 2 /C 2 H 2 through thermodynamic and kinetic synergetic effects. The unique cage-type structure interconnected by small windows exhibits high adsorption capacity for CO 2 while efficiently impeding adsorption diffusion of C 2 H 2 , which was proved by the single-component equilibrium and kinetic adsorption curves. Grand canonical Monte Carlo (GCMC) molecular calculations further show that the µ 3 -OH − of the framework have a stronger adsorption affinity for CO 2 through forming hydrogen bonds. Breakthrough experiments using Y-bptc as a CO 2 -selective adsorbent proved that high-purity C 2 H 2 (>99%) could be directly produced from one-step separation of CO 2 /C 2 H 2 (1/1, v/v) mixtures, which greatly reduced the separation process and energy consumption. In addition, the structure of Y-bptc due to the high charge density of the Y6 cluster has high stability under humid and high-temperature conditions adding to the application possibility in industry.
研究领域:
材料科学
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化学工程
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环境科学
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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）