JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Jiaojiao Chen,Yiwei Zhang,Mei Zhao,Xinyi Zan,Xiaohong Pan,Cunsheng Zhang,Ziwei Chen,Hossain M. Zabed,Xianghui Qi
Pectate lyase (PL) holds significant potential for applications in various industries. However, the existing PL was unable to adapt to thermo-alkaline industrial environments. In this work, a PL from Caldicellulosiruptor bescii DSM 6725 (hereafter, CbPelD) was studied to disclose its structural and biochemical properties. CbPelD consisted of a putative signal peptide sequence, a short linker region, and a catalytic domain (PelD-II), along with an exoacting β-fructofuranosidase domain (PelD-I). In molecular dynamics simulation, PelD-II demonstrated significantly higher activity and thermal stability compared to other truncated enzymes of CbPelD. The optimal pH and temperature for PelD-II were 10.0 and 60 °C, respectively, with the specific activity increasing by 164–223% in the presence of Ca2+ or Ni2+. The exotype PelD-II exhibited efficient degradation of polygalacturonic acid (PGA) into unsaturated galacturonic acid (uG1), digalacturonic acid (uG2), and trigalacturonic acid (uG3). In the bioscouring assay, PelD-II exhibited a significant increase in the wetted fabric area to 6.072 ± 0.684 cm2, which was about 7.9 times higher than untreated fabric. Scanning electron microscopy further revealed that treatment with PelD-II resulted in a smoother fiber surface, providing direct visual confirmation of the enzyme’s action. These results highlight the potential of PelD-II for applications in the textile industries.
研究领域:
酶学
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生物技术
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纺织工业
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Xuehui Ge,Jun Qian,Zhen Zhu,Yafei Cheng,Lei Yuan,Jinjie Jia,Xiaolei Liu,Hongwei Zhang,Xiaocheng Lin
Membrane separator that is highly ionic conductive and alkaline stable is essential for the efficient, scalable electrocatalytic oxidation of HMF to FDCA, a key process for sustainable development. Drawing inspiration from the microstructural design of Nafion, we developed a series of side-chain imidazolium-functionalized anion exchange membranes (AEMs), employing the chemically stable polyethersulfone (PES) as the base polymer. Functionalization of PES side chains with chloromethyl groups, followed by C2-substituted imidazolium modification, enabled precise tuning of the membrane's physicochemical properties and structural characteristics. This tailored approach yielded an optimized DIM-PES-1.0 AEM exhibiting complete HMF conversion, with 94.0 % selectivity for FDCA and 94.1 % Faradaic efficiency, outperforming the commercial Fumasep FAA-3-PK-130 AEM, which achieved only 85.5 % FDCA selectivity under similar conditions. Notably, the DIM-PES-1.0 AEM demonstrated high alkaline stability, substantially retaining its electrocatalytic activity across 15 cycles, in contrast to the rapid degradation observed in FAA-3-PK-130 AEM after only three cycles. Our findings showcase a scalable, efficient strategy for producing high-performance AEMs under mild conditions, highlighting their potential for advancing sustainable electrocatalytic processes.
研究领域:
化学工程
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可持续发展
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电催化
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产品关联
DOI
高影响因子
FARADAY DISCUSSIONS
·
2017
·Vol. 201
·63-70
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IF 3.588
Nian Zhao,Ping Li,Xin Mu,Chuanfang Liu,Fuxing Sun,Guangshan Zhu
A novel ultra-stable metal–organic framework, MCIF-1, [Cu2(DCI)2](MeCN), based on dicyanoimidazole and Cu(I), has been synthesized at room temperature successfully. MCIF-1 shows excellent water stability and can retain crystallinity after soaking in water for about one week. In addition, MCIF-1 also shows exceptional resistance under both acidic and basic conditions within a large pH range from 0 to 13.5. What is more, after modifying the synthesis procedure slightly, we can produce this material in a large scale during a very short time. Mild synthesis conditions, excellent stability and ease of large scale production give MCIF-1 great potential for practical use.
研究领域:
材料科学
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无机化学
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纳米技术
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Naeem Akhtar Qaisrani,Lingling Ma,Jiafei Liu,Manzoor Hussain,Lv Li,Panyue Li,Shoutao Gong,Fengxiang Zhang,Gaohong He
The anion exchange membranes (AEM) is one of the key components for alkaline electrolyte membrane fuel cells. However, poor alkaline stability and conductivity of the membrane greatly hinders its practical application. Herein, we report a novel 4-(dimethylamino)butyraldehyde diethyl acetal (DABDA) quaternized polysulfone AEM, or PSf-DABDA, which shows improved conductivity and alkaline stability due to the better hydrophilicity and the electron donating effect imparted by the long alkyl substituent with two ether-containing moieties in the cation structure. Its room temperature conductivity reaches 21 mS/cm while that of trimethylamine (TMA)- and dimethylbutylamine (DMBA) quaternized AEMs with comparable ion exchange capacity (IEC) is 11.8 and 13.2 mS/cm, respectively. When treated 150 h in 1 M NaOH at 60 °C, the PSf-DABDA membrane experiences a slight conductivity decrease of 5% while the PSf-TMA and PSf-DMBA membranes with a comparable IEC suffer a more serious conductivity decay of 19 and 13.5%, respectively. The better alkali stability of PSf-DABDA over its counterparts is further confirmed by a density functional theoretical study and a structural characterization before and after the alkali treatment. Our work demonstrates the advantage of the DABDA cation by both experimental and computational study; it presents a new possibility of improving AEM conductivity and stability.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Naeem Akhtar Qaisrani,Lingling Ma,Manzoor Hussain,Jiafei Liu,Lv Li,Ruiting Zhou,Yabin Jia,Fengxiang Zhang,Gaohong He
Anion-exchange membranes (AEM) with high ion content usually suffer from excessive water absorption and dilution effects that impair conductivity and mechanical properties. We herein report a novel ether containing a cross-linking strategy without adopting high ion-exchange capacity (IEC). The ether-containing cross-links and the quaternized structure are created simultaneously by introducing an ether-containing flexible hydrophilic spacer between two 1,4-diazabicyclo[2,2,2,2]octane or DABCO molecules; the resultant bi-DABCO structure was further employed to react with chloromethylated polysulfone. The long spacer with the ether moiety may benefit the hydroxide ion transport, and the cross-links will control the swelling and water absorption of the AEM. The two ether groups in the long spacer of the cross-links will also shield the DABCO cation from OH– attack due to an electron-donating effect. The prepared membranes exhibited an improved conductivity of 31 mS/cm (at 25 °C) at a comparatively low IEC (1.08 mmol/g) with a rational water absorption and low swelling ratio (95.0 and 27.1%, respectively); they also displayed an enhanced alkaline stability in 1 M NaOH aqueous solution at 80 °C for 150 h. The density functional theory study and physical characterization after the alkaline treatment further confirm the better chemical stability of the cross-linked membrane over its counterpart. Our work presents an effective strategy to balance AEM conductivity and robustness.
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
PubMed
高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 42
·7420-7426
·
IF 3.756
Mingming Ruan,Anqi Li,Yaping Wen,Lian Zhou,Jun Zhang,Xiaopeng Xuan
Ammonia capture is of great importance to environmental protection and resource conservation. In this work, two isoreticular bio-MOFs, namely, Zn(3-AIN)(AD)·DMF and Zn(3-AIN)(AD)·DMA, were constructed with inexpensive, easily available and low-toxicity/non-toxic ligands and Zn2+ in different solvents, respectively. They possess 1D channels decorated by four free amine groups and N atoms from pyrimidine rings and can retain their crystallinity and porosity even after soaking in boiling water for 4 hours and in aqueous solution with various pH values ranging from 1 to 14. These two bio-MOFs can serve as promising sorbents for NH3, exhibiting a large uptake of about 7–10 mmol g−1 at 1 bar.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2025
·
IF 11.3
Xianyu Kang,Xiangfang Liu,Qingchun Ge
Conventional polyamide nanofiltration (NF) membranes (PA-M 0 ) exhibit poor As(III) removal efficiency primarily due to the neutral molecular form (H 3 AsO 3 ) of As(III) under typical conditions. Although alkaline environments can convert As(III) into an anionic species to enhance separation, most NF membranes lack chemical stability at high pH. Herein, we develop a series of alkali-resistant NF membranes (PA-M T , T = 1–24 h, representing the reaction time) through H₂SO₄/EtOH-induced physical swelling and chemical reconstruction of PA-M 0 , enabling efficient As(III) removal in alkaline media. The optimized membrane, PA-M 6 h , improves As(III) rejection substantially from 19.9 % to 90.2 % as feed pH increases from 7 to 10, while maintaining a high water flux of 17.7 LMH/bar, This performance considerably surpasses that of PA-M 0 and previously reported NF systems (typically 10 – 60 % rejection). Furthermore, PA-M 6 h exhibits exceptional antifouling properties, sustaining 91.5 % As(III) rejection and a stable flux of 13.7 LMH/bar over extended cycles in the presence of humic acid foulants — more than doubling the removal efficiency of PA-M 0 (5.9 LMH/bar). This study advances molecular-scale interfacial engineering in membrane design, promoting the development of environmentally sustainable separation technologies and providing a scalable solution for arsenic-safe water purification.
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
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Wenli Ma,Lin Tian,Qingqing Zhu,Shuhuan Zhang,Fanghui Wang,Hong Zhu
To prepare anion exchange membranes with high water electrolysis and single fuel cell performance, an inorganic–organic composite (IOC) strategy with click cross-linked membranes coated with different contents of hydrophilic polar nanozirconia is proposed to fabricate composite membranes (CM) PBP-SH-Zrx. The performance test results showed that the CM PBP-SH-Zr4 not only has good through-plane ionic conductivity (167.7 mS cm–1, 80 °C), but also exhibits satisfactory dimensional stability (SR 16.5%, WU 206.4%, 80 °C), especially demonstrating excellent alkaline stability with only 16% degradation (2 M NaOH for 2200 h). In water electrolysis, the “microgap” between the membrane and catalyst layer (solid–solid interface) is alleviated, and the membrane electrode assembly (MEA) interfacial compatibility (liquid–solid–solid interface) is enhanced. The CM PBP-SH-Zr4 showed the lowest charge transfer resistance (Rct, 0.037 Ω cm2) and a high current density of 2.5 A cm–2 at 2.2 V, while the voltage drop was 0.361 mV h–1 after 360 h of endurance (six start–stop cycles) at 60 °C and 500 mA cm–2, proving a good water electrolysis durability. Moreover, an acceptable peak power density of 0.464 W cm–2 at 80 °C is achieved in a H2/O2 fuel cell with a PBP-SH-Zr4-AEM. Therefore, the IOC strategy can enhance the membrane’s comprehensive performance and interface compatibility of MEA and may promote the development of anion exchange membranes (AEMs) for water electrolysis and fuel cells.
研究领域:
材料科学
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能源工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Qian Yang,Yuan Yuan Cai,Zhao Yu Zhu,Li Xuan Sun,Yvonne Shuen Lann Choo,Qiu Gen Zhang,Ai Mei Zhu,Qing Lin Liu
The development of anion exchange membranes (AEMs) is hindered by the trade-off of ionic conductivity, alkaline stability, and mechanical properties. Tröger’s base polymers (Tb-polymers) are recognized as promising membrane materials to overcome these obstacles. Herein, the AEMs made from Tb-poly(crown ether)s (Tb-PCEs) show good comprehensive performance. The influence of crown ether on the conductivity and alkaline stability of AEMs has been investigated in detail. The formation of hydronium ion-crown ether complexes and an obvious microphase-separated structure formed by the existence of crown ether can enhance the conductivity of the AEMs. The maximum OH– conductivity of 141.5 mS cm–1 is achieved from the Tb-PCEs based AEM (Tb-PCE-1) at 80 °C in ultrapure water. The ion-dipole interaction of the Na+ with crown ether can protect the quaternary ammonium from the attack of OH– to improve the alkaline stability of AEMs. After 675 h of alkaline treatment, the OH– conductivity of Tb-PCE-1 decreases by only 6%. The Tb-PCE-1-based single cell shows a peak power density of 0.202 W cm–2 at 80 °C. The prominent physicochemical properties are attributed to the well-developed microstructure of the Tb-PCEs, as revealed by TEM, AFM, and SAXS observations.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Xiaoming Yan,Runlian Deng,Yu Pan,Xiaowei Xu,Issam El Hamouti,Xuehua Ruan,Xuemei Wu,Ce Hao,Gaohong He
Hydroxide exchange membrane fuel cells (HEMFCs) are attracting growing interest owing to their advantages such as low cost and high power density. However, their applications are hindered due to the poor stability of the membrane. Here, we proposed a novel strategy to improve the alkaline stability of hydroxide exchange membranes (HEMs) using the interactions between strongly polar nitrile groups and side-chain functional cations. A poly(ether nitrile) (PEN) was synthesized by the polycondensation of bisphenol A and 2,6-difluorobenzonitrile, and then imidazolium and morpholinium functional groups were integrated by the typical chloromethylation-functionalization method. The existence of the interactions between nitrile groups and cation groups i.e. imidazolium and morpholinium, was proved by the density functional theory calculations. The interactions have two positive effects that contribute to the improvement of the alkaline stability of the PEN based membranes. On the one hand, they increase the LUMO energies of the functional groups; and on the other hand they reduce the free volume around hydrated cationic groups. As a result, PEN based membranes showed much better alkaline stabilities compared to the membrane based on commercial polysulfone that has a similar chemical structure . In addition, given similar swelling ratios, PEN based membranes exhibited higher hydroxide conductivities than simple polysulfone based ones.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Naeem Akhtar Qaisrani,Waheed Afzal,Usman Khalid,Muther Mansoor Qaisrani,Subhan Azeem,Ali Ahmad,Lingling Ma,Lv Li,Fengxiang Zhang
Anion exchange membranes (AEMs) with high OH - conductivity, good alkaline stability, and dimensional stability are still challenges for AEM fuel cells to be used in practice. In this study, high-performance cross-linked AEMs are developed. To construct the hydrophilic ionic channels, a series of polysulfone-based cross-linked AEMs were prepared utilizing the DABDA cation and two distinct cross-linkers (one with ether and one without ether). The cross-linking process enhanced aggregation of ion clusters, which resulted in the formation of ion-conductive channels and phase-separated hydrophilic/hydrophobic morphology, as well as enhancing the dimensional stability of the AEMs. The produced AEMs demonstrated good conductivity relative to their swelling ratio at 70 °C, and high conductivity in the range of 19.6–46.7 mS/cm between 25 and 70 °C. Additionally, the cross-linked AEMs revealed enhanced alkaline, mechanical and thermal stability. This work presents a promising strategy for developing high-efficiency AEMs for fuel cells.
研究领域:
材料科学
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能源工程
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2019
·
IF 2.12
Xu Han,XuYing Zheng,Shiyang Song,Jilin Wang,Lulu Wang
A series of composite membranes (CS-PY-DL x ) were synthesized by using schiff base functionalized chitosan (CS-PY) as the polymer matrix, 1,4-dichlorobutane (DL) as the crosslinker, the quaternization reagent is iodomethane . In this work, pyridine groups grafted on chitosan were converted into quaternary ammonium salt while forming cross-linked network structure. The FT-IR shows that the CS-PY-DL x membranes has been successfully prepared. The introduction of cross-linked structure enhances the alkali resistance, thermal stability and other properties of CS-PY-DL x membranes. When the cross-linked degree is 25%, the anion exchange membrane had the maximum tensile strength (24.45 MPa), and the anionic conductivity reaches 7.08 × 10 −3 S cm −1 at 70 °C. The alkali resistance test was researched under the condition of 3 mol L −1 KOH solution for 120 h at 80 °C, which showed that the OH − conductivity of CS-PY-DL 25 membranes retains approximately 79.7% of its initial conductivity, revealing the excellent alkali resistance. Methanol permeability was only 0.37–0.72% of the Nafion-117 membrane in 3M methanol at 60 °C, indicating an excellent resistance to alcohol.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）