ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Jialin Chi,Shiyin Wu,Liping Fang,Kai Liu,Shaochen Huang,Wenjun Zhang,Fangbai Li
Dissimilatory nitrate reduction to ammonium (DNRA) by functional microbes is crucial for optimizing nitrogen preservation and sustainable utilization in agricultural soils, particularly in paddy soils where nitrogen management is essential for crop yields, while the biocatalytic efficiency for this process is always limited, especially in soils polluted with heavy metals such as cadmium (Cd). In this study, we strategically designed a heavy metal-resistant nanogel (Bg) material with variable functional groups incorporating imidazole, carboxyl, and thiol groups and hybridized this material with DNRA functional strain, Shewanella oneidensis MR-1, resulting in a biohybrid system. Notably, the biohybrid system efficiently catalyzed DNRA processes, achieving up to around 2–4 times increase in nitrogen transformation rates in the absence/presence of Cd2+ compared to S. oneidensis MR-1 alone because the Bg material from the biohybrid system can promote DNRA by functional strain and mediate Cd immobilization processes through distinct functional groups. Within the biohybrid-mediated DNRA process, the thiol groups derived from Bg act as electron shuttles, significantly promoting the extent and rate of DNRA. For the Cd immobilization process, the imidazole and carboxyl groups within Asp-xxx-His sequences from Bg serve as primary Cd binding sites, as confirmed by dynamic force spectroscopy (DFS). This study provides valuable insights into the precise control of nitrogen cycling and sustainable utilization in agricultural soils, highlighting the significant role of the designed biohybrid materials in enhancing both DNRA efficiency and heavy metal immobilization.
研究领域:
环境微生物学
·
农业科学
·
土壤生态学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Ke Zheng,Shaoqi Zhou,Zuqin Cheng,Guoru Huang
Quaternized poly phenylene oxide (QPPO) was synthesised and used as a modifier material to blend with polyvinyl chloride (PVC) to cast the substrate for thin-film composite (TFC) forward osmosis (FO) membranes. The addition of QPPO improved the porosity, hydrophilicity , and morphology of the substrate, thereby weakening the internal concentration polarisation of TFC membranes . Furthermore, the introduction of QPPO improved the structure of the active layer , which led to higher water permeability. Moreover, the mechanical properties of the TFC membranes were significantly improved after the introduction of QPPO. As a result, introducing QPPO significantly increased the FO performance. In addition, the TFC membrane based on a 40% QPPO blend ratio exhibited optimal FO performance: a high water flux of 71.21 L h −1 m −2 and an extremely low specific reverse solute flux of 0.079 g L −1 under the active layer facing the draw solution (DS) mode by utilising 1 M NaCl as the DS and deionised (DI) water as the feed solution; this FO performance remained fairly stable during long-term operation. This study suggests that introducing QPPO into the substrate is a sensible strategy for fabricating high-performance TFC FO membranes.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Yanping Wang,Kexin Li,Dezhen Fang,Xiushen Ye,Haining Liu,Xiaoli Tan,Quan Li,Jun Li,Zhijian Wu
A new composite adsorbent (AMP@MOF-76(Sm)) grafted ammonium molybdophosphate onto MOF-76(Sm) was synthesized via a solvothermal method and well-characterized by SEM-EDS, particle size analysis , N 2 adsorption-desorption isotherms, TG, FT-IR, XRD and XPS analysis . The adsorption behaviors of Rb + and Cs + on synthesized AMP@MOF-76(Sm) were investigated depending on the parameters of solution pH, ionic strength, contact time, ion concentration and temperature. The adsorbent can adsorb Rb + and Cs + from the solution when the solution pH ranged from 4.0 to 10.0 and the coexisted ion (Na + ) has little effect on the adsorption amounts of both Rb + and Cs + . The adsorption kinetic data fitted well with pseudo-second order kinetic models . The adsorption equilibrium of Rb + and Cs + on AMP@MOF-76(Sm) is better explained by the Langmuir isotherm model and the maximum adsorption amounts for Rb + and Cs + are 0.490 mmol g −1 and 0.434 mmol g −1 , respectively. Furthermore, the AMP@MOF-76(Sm) could be easily reused at least four times using 3.0 mmol L −1 ammonia nitrate as the eluent . The mechanism of the adsorption of Rb + and Cs + is proposed to be a combination of electrostatic attraction and ion exchange mechanism.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Faizal Soyekwo,Hui Wen,Dan Liao,Changkun Liu
Selective recovery of lithium from Salt Lake brines using environmentally friendly technologies is increasingly demanded to overcome the shortage of lithium. However, satisfying high separation precision is challenging for most polymer nanofiltration membranes. Besides, bestowing high permeance together with improved membrane fouling remains a challenge for the widespread implementation of membrane processes. Herein, a new tri-quaternary ammonium-based ionic liquid (TQAIL) electrolyte monomer is synthesized and utilized for the surface modification of nascent polyamide active layer to fabricate IL-modified polyamide nanofiltration (NF) membrane for Mg 2+ /Li + separation. Molecular dynamics simulations confirm that TQAIL modification creates nanoscale structural heterogeneity leading to enhanced surface hydrophilicity and reduces internal resistance through the membrane selective layer. The TQAIL membrane exhibits improved Li + /Mg 2+ selectivity and improved water permeability of 26.11 L m −2 h −1 bar −1 , which is fourfold that of unmodified membrane accompanied with a 100-h stable continuous nanofiltration. Moreover, the membrane displays good anti-biofouling behaviour with excellent antimicrobial properties. This study offers new insights into how surface functionalization using multication side chains can remarkably improve ion separations by molecularly tuning ion-membrane electrostatic interactions in polymeric membranes .
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2017
·Vol. 228
·期 8
·1-17
·
IF 1.702
Zeng Anrong,Zeng Anran
In this paper, quaternized β-cyclodextrin–montmorillonite composite (QCD-MMT) was obtained and absorption properties of Cr(VI), methyl orange and p-nitrophenol were studied. QCD was prepared by 2,3-epoxypropyltrimethylammonium chloride and β-cyclodextrin (β-CD). QCD-MMT was obtained by reaction between QCD and montmorillonite suspensions, which could be attributed to the montmorillonite cation ion exchange properties. β-CD cavities of this composite were expected to capture organic molecules through inclusion, while montmorillonite units acted as the adsorption sites for metals. QCD-MMT was characterized by FT-IR, elemental analysis, XRD, SEM-EDX, and TGA. Adsorptions of Cr(VI), methyl orange, and p-nitrophenol were highly dependent on adsorbent dose, initial concentration, temperature, contact time, and pH. Adsorption kinetics of Cr(VI), methyl orange, and p-nitrophenol followed the pseudo-second-order model. Meanwhile, adsorption of Cr(VI) fit better in the Freundlich model, inferring a multilayer adsorption, while the adsorption of methyl orange and p-nitrophenol fit better in Langmuir model, inferring a monolayer adsorption. Thermodynamic analysis showed that the adsorptions were all endothermic process and could be spontaneous at given temperature range, except for Cr(VI), of which adsorption should be at much higher temperature. Overall, QCD-MMT exhibited potential for practical applications in the treatment of both metal ions and organic pollutants.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2022
·Vol. 9
·期 2
·025309
·
IF 2.025
Jingdan Zhang,Yongqing Zhai
To improve the application performance of organic montmorillonite (OMt) and meet the OMt performance requirements of different fields, herein, we developed a synergistic modification method to prepare cationic–nonionic OMt (CN-Mt) using the emulsifier OP-10 and hexadecyltrimethylammonium chloride (CTAC) as comodifiers. The structure, morphology and properties of CN-Mt, cationic-OMt (C-Mt) and nonionic OMt (N-Mt) were studied by XRD, SEM, DSC, and contact angle and swell index measurements. CN-Mt has a larger layer spacing and thinner lamellae, which are obviously different from those of C-Mt and N-Mt. Moreover, CN-Mt was hydrophobic due to its denser organic surface molecules. The interlayer spacing of CN-Mt is positively related to the amount of modifier, and the amount of OP-10 contributes more to the interlayer spacing than CTAC. When the amounts of OP-10 and CTAC are 1.3 and 0.8 times the Mt cation exchange capacity (CEC), the interlayer spacing of the optimal CN-Mt is 4.49 nm, which is significantly higher than that of C-Mt (4.11 nm) at a 2.9 CEC, N-Mt (4.26 nm) at a 1.7 CEC and CN-Mt (4.20 nm) at a 0.9OP-10 + 1.5CTAC CEC. Benefitting from its structural merits, CN-Mt shows a higher degree of lamella separation, peeling and dispersion than C-Mt and N-Mt, as well as good thermal stability. Moreover, the lipophilicity and expansion of CN-Mt in medium- and low-polarity media are better than those of single-component OMt. Therefore, the structure and properties of CN-Mt can be controlled by adjusting the types and amount of modifier, further meeting the performance requirements of various application fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
COMBUSTION SCIENCE AND TECHNOLOGY
·
2022
·
IF 2.133
Shuang Xu,Aimin Pang,Jie Kong
The liquid burning rate suppressants (BRSs) at room temperature were first prepared by combining urea with adsorption group from AP-bonding agents. The novel urea BRSs were applied in triethylene glycol dinitrate (TEDGN) plasticized hydroxyl-terminated polyether (HTPE) propellants. The results show that only 0.5% of them can reduce the burning rate and pressure index of the propellants at the same time. Owing to the adsorption group from AP bonding agents, the novel urea BRSs can adsorb onto the surface of AP during mixing by themselves, which are more suitable for industrial application than nano-sized or encapsulated BRSs. In addition, the desirable mechanical performance can be obtained and the BRSs have little influence on the hazardous properties of propellants.
研究领域:
推进剂化学
·
材料科学
✓ 已验证
DOI
高影响因子
Science Bulletin
·
2018
·
IF 4.136
Aqiang Liu,Kang Liu,Huimin Zhou,Hongmei Li,Xiaoqing Qiu,Yi Yang,Min Liu
Organic-inorganic hybrid perovskite solar cells (PSCs), due to their high power conversion efficiency (PCE) and low cost, have been considered as one of the most promising photovoltaic devices . Well-distributed large-grain perovskite crystals play an important role for light adsorption and charge transfer. While, high quality perovskite crystals closely relate to the preparation method. Generally, the preparation of perovskite films requires a nitrogen atmosphere and toxic anti-solvents, which hinder their practical applications. Here, we reported a novel and simple solution evaporation process followed with a methylammonium iodide (MAI) solution immersion to prepare high quality perovskite films. Porous lead iodide (PbI 2 ) films were firstly formed by evaporation of PbI 2 precursor solution . The obtained porous PbI 2 films were completely transformed into well-distributed large-grain perovskite films after a quick MAI solution immersion. As a result, the corresponding PCE was enhanced by 30% compared to that prepared with a regular sequential deposition. This solution evaporation method provides a convenient and practical way for preparing high-quality perovskite films.
研究领域:
材料科学
·
能源技术
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DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2024
·Vol. 31
·期 3
·897-912
·
IF 2.5
Lu Qing,Wang Shougui,Ji Cailin,Chen Guanghui,Dong Jipeng,Gao Fei
Ionic liquid immobilization is an effective means for preparing metal-free heterogeneous catalysts for the CO 2 conversion. Herein, a series of quaternary ammonium ionic liquids functionalized MCM-41 heterogeneous catalysts, integrating hydrogen bond donors and nucleophilic ion sites, were prepared by a post-synthetic modification method for the CO 2 cycloaddition reaction. The physicochemical properties of the catalysts were analyzed by XRD, EA, SEM, TEM, BET, FT-IR, TGA, NMR and XPS. The results show that the quaternary ammonium ionic liquids are successfully immobilized onto the MCM-41 molecular sieves. The obtained catalysts maintain an excellent pore structure and have the good thermal stability. The effects of catalytic conditions on the catalytic performance, the recyclability of the catalysts and their generalizability to epoxide substrates were systematically investigated. In addition, the catalytic performance was evaluated for low concentrations of CO 2 (20% CO 2 , 80% N 2 ). The synergy of multifunctional active sites makes the obtained materials exhibit the high catalytic activity without metals, co-catalysts and solvents. Furthermore, a possible mechanism for the conversion of CO 2 to cyclic carbonate catalyzed by the MCM-41-N/CH 3 (1:3) was proposed.
研究领域:
化学工程
·
催化科学
·
材料科学
✓ 已验证
DOI
高影响因子
COMBUSTION AND FLAME
·
2020
·
IF 4.57
Lirong Bao,Wei Zhang,Xiaojun Zhang,Yongyi Chen,Suhang Chen,Lizhi Wu,Ruiqi Shen,Yinghua Ye
In the controllable combustion field, hydroxyl ammonium nitrate (HAN)-based electrically controlled solid propellants (ECSPs) is of growing interest in green fuels with safety, throttle- ability and at-will on-off capability. However, the current research is confined to the ignition characteristics and ablation process of basic ECSP formulations (75 wt% HAN ionic liquid oxidizer , 5 wt% ammonium nitrate co-oxidizer and 20 wt% polyvinyl alcohol binder), rather than working in functional additives. Herein, multiwall carbon nanotubes (MWCNT) and nano/micro aluminum powders were introduced in ECSPs, facilitating electrical conductivity and energy release. It indicates that the homogeneous dispersed MWCNT in polyvinyl alcohol (PVA) microspheres , preparing by the micro-segmented flow method, results in a 9.8% increase in electrical conductivity of the ECSPs. At 0.5 MPa, ECSPs containing 1%, 3% and 5% 5 µm aluminum powder reinforce the burning rate by 38.0%, 186.3%, 214.7% and mass ablation by 10.7%, 95.2%, 175.6% at 200 V, yet the large heat release by excess aluminum powder shifts the non-self-sustaining combustion of ECSPs to self-sustaining combustion at high pressure (above 0.8 MPa). The mechanism of promoting ECSPs combustion by liberating aluminum-nitric acid (released by HAN ionization) reaction were proposed.
研究领域:
材料科学
·
燃烧学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2013
·Vol. 129
·期 6
·3185-3191
·
IF 1.395
Yu Chen,Fengju Wang,Dongran Yun,Yanwen Guo,Yanchun Ye,Yanxi Wang,Huimin Tan
In this study, we explored a new method for preparing C 6 quaternary ammonium chitosan (CTS) derivatives. The C 2 NH 2 of CTS was first protected by benzaldehyde. The C 6 OH of CTS was then transformed into a sulfonyl ester, which was then reacted with NaN 3 through nucleophilic substitution to introduce the N 3 group at the CTS C 6 position. This intermediate was reacted in a click chemistry reaction with a terminal alkynyl quaternary ammonium salt; this was followed by the deprotection of C 2 NH 2 with acid to furnish the C 6 quaternary ammonium CTS derivative. The structures and properties of synthesized products in the reactions were characterized by Fourier transform infrared spectroscopy, NMR, X-ray diffraction, and thermogravimetric analysis, respectively. The effects of the reaction conditions on the degree of Schiff-base CTS quaternization were evaluated by elemental analysis. The largest inhibition zone test and the minimum inhibitory concentration test showed that compared with CTS, the prepared CTS derivative had significantly improved antibacterial activity toward Staphylococcus aureus and Escherichia coli . © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
研究领域:
高分子化学
·
药物化学
·
生物材料
·
抗菌材料
·
天然产物化学
✓ 已验证
DOI
高影响因子
PLASMA CHEMISTRY AND PLASMA PROCESSING
·
2024
·Vol. 44
·期 5
·1951-1969
·
IF 2.6
Siyuan Sui,Guohua Ni,Hongmei Sun,Ling Kong,Tao Sun
In this paper, a novel method is presented to enhance the antimicrobial properties of polyvinyl chloride (PVC) via plasma-induced grafting of quaternary ammonium (QA). The results show that the content of oxygen-containing functional groups on PVC surface is significantly increased after Ar-O 2 plasma treatment, beneficially enhancing the thickness and adhesion of QA coating. Plasma treatment time critically affects the morphology of PVC surface, which is closely related to the number, depth and diameter of pit on the surface. With the increase of pits size, the PVC surface forms ridge-like protrusions. The coating formed by grafting QA maintains the morphology characteristics of plasma-treated PVC surface. Results of antibacterial test show that specimens have the best antibacterial activity when there are a high and sharp ridge-like structure of QA coating on the plasma-treated PVC surface.
研究领域:
生物材料学
·
表面科学
·
高分子化学
·
抗菌材料
·
医学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）