ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Shuaiqi Gao,Pengling Zhang,Zhenzhen Wang,Guokai Cui,Jikuan Qiu,Jianji Wang
The emission of SO2 from the combustion of fossil fuels leads to many environmental issues. The incorporation of ionic liquids (ILs) on porous supports to produce supported ionic liquids is an effective technology for SO2 capture. However, blockage of pore channels is one of the main problems of this technology, which results in a substantial decrease of absorption capacity. Herein, a novel type of ionic liquid, 1-methyl-3-(3-triethoxysilylpropyl) imidazolium tetrazolate, functionalized large pore sized 3D mesoporous FDU-12 sorbents has been synthesized through a chemical grafting method. The as-prepared materials are characterized using SAXS, N2 adsorption, TEM, XPS, elements analysis, EDS mapping, and TGA and then the performance of these materials to capture SO2 is studied. The IL@FDU-12 materials are found to exhibit a high absorption capacity of SO2 up to 8.19 mmol SO2/g-sorbent (i.e., 524.2 mg/g) and a fast absorption rate (ca. 6 min is needed to reach equilibrium) at 25 °C and 1 bar since blockage of pore channels is effectively avoided and the IL is highly dispersed in the channels. These materials can also be used for the effective capture of CO2 (1 bar) and low content of SO2 (10%). Moreover, they have excellent thermal stability and can be reused in many absorption/desorption cycles without loss of the high absorption capacity and fast sorption/desorption rate.
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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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shen Wang,Meng Rong,Lin-Bing Sun,Yunze Zhao,Huifang Xing,Liangrong Yang
Indeed, the efficient and sustainable recovery of lithium from highly concentrated sodium-containing mother liquors of Li 2 CO 3 and salt-lake brines remains a significant challenge. Herein, two typical Li + recognition receptors, namely benzo-12-crown-4 and thenoyltrifluoroacetone, were separately introduced into the cationic and anionic parts to successfully synthesize novel bi-functionalized task-specific ionic liquids [(B12C4)C n im][TTA] (n = 4, 6, 8). A new, green, and high-efficiency extraction system has been developed by dissolving [(B12C4)C 6 im][TTA] in commercial room-temperature ionic liquid 1-hexyl-3-methyl-imdazolium bis(trifluromethylsulfonyl)imide [C 6 mim][NTf 2 ], without the addition of any other co-extractants. The newly developed [(B12C4)C 6 im][TTA]-[C 6 mim][NTf 2 ] extraction system exhibited a wide pH working range (4.0–11.0), high lithium extraction efficiency (95.4 %), as well as superior separation factors of Li/Na (β Li/Na = 2154.0) and Li/K (β Li/K =757.2). The extraction mechanism involving cation exchange was determined through slope analysis, ion chromatography, UV–vis spectroscopy and FT-IR spectra measurement, indicating that one [(B12C4)C 6 im][TTA] molecule can interact with two lithium ions and form a 1:2 complex. Moreover, the [(B12C4)C 6 im][TTA]-[C 6 mim][NTf 2 ] extraction system also demonstrated fast extraction kinetics, facile stripping and regeneration, along with good cycling performance. Furthermore, a multi-stage countercurrent extraction process to extract lithium from the simulated mother liquor of Li 2 CO 3 was evaluated. When the volume ratio (O/A) of oil phase (O) to water phase (A) was 1.0, only two theoretical extraction stages were needed to extract 91.4 % of lithium into the organic phase. Thus, the [(B12C4)C 6 im][TTA]-[C 6 mim][NTf 2 ] extraction system is promising for lithium extraction from mother liquor of Li 2 CO 3 and salt-lake brines. This study also opens the avenue for designing cationic and anionic bi-functionalized ionic liquids for metal ion separation.
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
Engineering Reports
·
2025
·Vol. 7
·期 9
·e70371
·
IF 2
Jianxia Guo,Haichao Li,Xiaofei Kang
The research field focused on regulating the morphology and dimensions of carbon nanostructures is experiencing steady advancement. This paper proposes a low-cost, simple, and easy-to-operate experimental method involving confined in situ carbonization. Through carbonization of sulfate-coated N -dodecyl- N , N -dimethyl-3-ammonio-1-propanesulfonate (SB3-12), a rare icosahedral carbon nanostructure was successfully synthesized. Scanning electron microscopy (SEM) characterization revealed that this polyhedron exhibits a stable and symmetrical architecture composed of 2 hexagonal and 18 quadrilateral facets. Comprehensive characterizations including Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) were employed to investigate the structural properties of the synthesized material. This study holds significance for exploring novel regulation strategies for carbon nanostructures and their future development.
研究领域:
纳米材料学
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碳材料化学
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表面与界面科学
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功能材料
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Wei Jin,Rongrong Wang,Xirong Huang
The horseradish peroxidase (HRP) mediated synthesis of conducting polyaniline (PANI) was investigated in detail in the bicontinuous microemulsion stabilized by both sodium bis(2-ethylhexyl) sulfosuccinate (AOT) and dodecyl sulfobetaine (SB-12). The addition of zwitterionic surfactant SB-12 not only reduces the phase inversion temperature of the anionic surfactant AOT stabilized microemulsion, but also enhances the catalytic performance of the solubilized HRP. Compared with the previously reported AOT/SDS stabilized bicontinuous microemulsion, the present AOT/SB-12 stabilized bicontinuous microemulsion is much more suitable for the expression of the catalytic activity of HRP; moreover, the conductivity of the resulting PANI improves greatly (a 15-fold increase in conductivity). The present results indicate further that the catalytic activity of HRP and its stability are crucial for the biosynthesis of PANI in bicontinuous microemulsions. To understand the underlying mechanism of the medium effects, electron spin resonance (ESR), UV–vis-NIR and small-angle X-ray scattering (SAXS) spectroscopies were used to investigate the effects of the oil-to-water ratio ( α ) and the surfactant concentration ( γ ) of the present bicontinuous microemulsion on the conductivity of resulting PANI. Results show that the bicontinuous microemulsion stabilized by both AOT and SB-12 still has a template role in the biosynthesis of PANI and the PANI conductivity is mainly determined by the microstructure of the template and by the microstructure-dependent activity and stability of the solubilized HRP. Lower α and γ values are beneficial to the enzymatic synthesis of high-quality PANI. The present study is of great help not only to deepen the understanding of the template role of anionic surfactant aggregates in the biosynthesis of conducting PANI, but also to develop new strategies for the biosynthesis of high quality PANI.
研究领域:
生物化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 19
·11572
·
IF 6.208
Chengzhao Li,Jun Dang,Yue Lv,Yan Fang,Chengjun Ma,Qilan Wang,Gang Li
Dracocephalum heterophyllum(D. heterophyllum) is a traditional Chinese Tibetan medicine that has been used for the treatment of lymphitis, hepatitis, and bronchitis. However, only a few selected chemical components are currently obtained fromD. heterophyllum, which limits its further pharmacological applications. In this study, we have obtained samwinol fromD. heterophyllumby medium- and high-pressure liquid chromatography separation for the first time. Thereafter, we investigated the protective actions of samwinol against amyloid beta protein fragment 25–35 (Aβ25–35) induced neurotoxicity in cultured rat pheochromocytoma PC-12 cells and explored its underlying mechanisms of action. The results indicated that samwinol could increase cell viability and inhibit the production of reactive oxygen species (ROS) and mitochondria-derived ROS, as assessed by MTT assay, Giemsa staining, and flow cytometry assay. Through Western blot analysis, it was found that samwinol substantially inhibited the phosphorylation of ERK(1/2) and promoted the expression of HO-1 and Nrf2. The data obtained from molecular docking were also consistent with the above conclusions. All of these results showed that samwinol fromD. heterophyllumcan display significant anti-neuroinflammatory and antioxidant activities in vitro, which are associated with the suppression of ERK/AKT phosphorylation and the activation of the Nrf2/HO-1 signaling pathway. In the future, additional in-depth mechanism studies will be carried out to provide more evidence for the potential of samwinol in the treatment of Alzheimer’s disease.Keywords:D. heterophyllum;PC-12 Cells;Aβ25–35;neuroinflammatory;oxidative stress
研究领域:
药理学
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神经科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF RHEOLOGY
·
2017
·Vol. 61
·期 3
·515-524
·
IF 3.136
Yang Jianjian,Yan Hua,Dai Jun,Hu Zhide,Zhang Hansong
In this study, carbonyl iron based magnetorheological fluids (MRFs) with 12-hydroxy stearic acid (12-HSA) oil solutions as carrier were fabricated. Rheological performance of the magnetorheological fluid, including viscosity, yielding, magnetic hysteresis, dynamic modulus as well as thixotropic behavior, was investigated by using a rotational rheometer equipped with a magnetic device. It is found that the 12-HSA gave rise to an increase in the off-state viscosity and shear stress in the absence of magnetic field, indicating gel structure developed in the suspensions. This gel network associating with field-induced particle structure lead a substantial yield stress and dynamic modulus. The hysteresis test validated that the gel like network had a certain effect on maintaining the aggregation structure after removing the magnetic field. Dynamic oscillatory tests showed that 12-HSA solution based MRF exhibits solidlike property in the absence of magnetic field. The dependence of plateau value G′ on magnetic field showed relationship of natural logarithm. Regarding to the thixotropy, a longer recovery progress was observed in 12-HSA solution based MRF due to the restriction of gel network. The sedimentation measurements revealed that the strong flocculation could be formed by 12-HSA and enhances the stability of suspensions.
研究领域:
材料科学
·
流变学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2022
·
IF 4.119
Jiaqi Yang,Guorui Qu,Cuiping Liu,Shiwei Zhou,Bo Li,Yonggang Wei
The high lithium content in spent lithium ion batteries (LIBs) and a large number of spent LIBs generation shift the target of lithium recovery to solid waste. Adsorption separation is of great application value for lithium recovery. There is still a lack of a lithium adsorption material with excellent properties. Herein, an environmental hydrolytic polymerization to prepare lithium ion-imprinted membranes (LIIMs) with high adsorption capacity and selectivity is presented. The LIIMs can reach adsorption equilibrium in 40 min, showing fast adsorption kinetics . The optimal adsorption capacity of the LIIMs for Li + was 132.00 mg g −1 after immersing in a 300 mg L −1 LiCl solution based on ample binding sites and a strong affinity force. Langmuir isothermal adsorption results proved that the imprinting sites on LIIMs were homogeneous. The selective separation factors (α) of Li + to Mg 2+ , K + , Ca 2+ , Na + were 6.80, 17.00, 21.30, and 24.60, respectively, which implies the superior selectivity LIIMs toward Li + . The adsorption capacity of LIIMs remained about 97 % after six cycles. Due to the suitable cavity, abundant rebinding sites, and strong affinity, the LIIMs have a good selective adsorption ability to Li + . Therefore, the LIIMs would have potential applications for separating Li + from spent LIBs.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 3.8
Yanxue Pei,Muchen Yin,Yanan Cui,Fan Yang,Xueying Bian,Jun Li,Yaodong Wu
Acetaminophen (APAP) is widely used for its antipyretic properties and is commonly found in wastewater, potentially threatening aquatic ecosystems. Microbial degradation has been proven effective in removing APAP. However, strains capable of efficiently degrading APAP are rare, and the research on the biodegradation kinetics of APAP is insufficient. In this study, a novel APAP-degrading strain, identified as Delftia sp . PY-12 by morphological characterization and 16S rRNA gene sequencing, was isolated from activated sludge. Experimental conditions were optimized using the Box-Behnken response surface design, revealing that PY-12 degraded 100 mg/L APAP under pH 7.11, 30℃, and 163 rpm within 24 h, outperforming most other strains. Comparative analysis of substrate inhibition models shows that the Aiba and Tiesser were most suitable for the substrate inhibition characteristics of PY-12. The models indicate that PY-12 can still degrade APAP even at concentrations of 446.919 mg/L and 554.215 mg/L. Through potential enzyme activity measurements, the degradation pathway of APAP by PY-12 was determined. APAP is first converted by amidohydrolase into 4-aminophenol (4-AP) and then converted by deaminase into hydroquinone (HQ), which is further converted by hydroquinone 1,2-dioxygenase to form 4-hydroxymuconic semialdehyde, ultimately entering the TCA cycle. This study revealed the potential application value of PY-12 in APAP degradation, which could be a strong candidate strain for microbial bioremediation of APAP pollution in environmental remediation.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Jia Wang,Wen-Cui Li,Andi Di,Li-Dong Zhao,Danhui Sun,Lei He,An-Hui Lu
Ethanol upgrading to C6–12 alcohols offers a green pathway to high-valued chemicals. Achieving high yields of C6–12 alcohols remains challenging due to the complexity of the ethanol reaction network. Here, we report an efficient conversion of ethanol to C6–12 alcohols using Ca-deficient mesoporous hydroxyapatite as the catalyst, which was prepared from the reaction of NH3 and PO43–. The yield of C6–12 alcohols reached 34.5% with a selectivity of 59.3% at 325 °C and 0.1 MPa, exhibiting a high ethanol upgrading performance. Ethanol adsorption kinetics and ethanol-TPD-DRIFT results revealed that the ethanol diffusional time constant of the enlarged pore of the hydroxyapatite increased by 2.01 folds of the original hydroxyapatite, thereby facilitating the access of ethanol molecules to active sites, which was beneficial for ethanol dehydrogenation. The online-generated acetaldehyde was subsequently undergoing aldol condensation to accelerate the formation of C4 aldehydes, which, as the intermediates, were stabilized over Ca deficiency sites on the hydroxyapatite surface. The enriched C4 aldehyde intermediates are further coupled with C2, C4, or C6 aldehydes at the basic sites to produce longer-chain aldehydes (C ≥ 6), which are subsequently hydrogenated to form C6–12 alcohols. Noticeably, compared to the original hydroxyapatite, the Ca-deficient hydroxyapatite showed enhanced density of basic sites, about two times higher. Hence, this catalyst remarkably boosted the yield of C6–12 alcohols from ethanol upgrading. This work provides a strategy for the selective conversion of ethanol to C6–12 alcohols.
研究领域:
催化化学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2019
·Vol. 33
·期 10
·e5145
·
IF 3.259
Zhiguo Lv,Shuying Zhang,Zhenmei Guo,Xi Cheng,Jiaomei Wang,Chao Zhang
The synthesis of alcohol ester 12 is one of the valuable industrial processes, but it was impeded by poor separating property and recycling ability of the catalytic systems. Herein, four novel DBU-based basic ionic liquids (DBILs) of [BDBU]IM, [BDBU]OH, [ODBU]IM, [[ODBU]OH were synthesized successfully by introducing the alkyl chains of 1-bromobutane or 1-bromooctane to 1,8-diazabicyclo [5.4.0] undec-7-ene (DBU), and then, employing imidazole (IM − ) or hydroxide (OH − ) as counter ions. The above obtained four ionic liquids were applied in the synthesis of alcohol ester 12 in isobutyraldehyde (IBD)/aqueous media for the first time. Interestingly, after reaction, production of alcohol ester 12 can be self-separated from ionic liquids/water (ILs/W) catalytic system automatically. Furthermore, the self-separated ILs/W can be recycled and used in next catalytic reaction for at least 5 times without obvious loss of catalytic performance. In this work, the structure, purity, thermal stability and alkalinity of DBILs were characterized systematically. [BDBU]IM shows high alkalinity and thus enhances yield of 66.17%. From thermo gravimetric analyzer (TGA), [BDBU]IM also exhibits excellent thermal stability. So [BDBU]IM was chosen for the further studying. Furthermore, quantum chemistry is applied to calculate the interaction forces and electron energies of reactants by DFT, and the calculation results illustrate the feasibility of synthetic process of DBILs. The self-separation strategy of DBILS in this work may open up a new avenue for the clean synthesis of other industrial products.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Food & Function
·
2020
·Vol. 11
·期 4
·3235-3244
·
IF 4.171
Yujin Liu,Minhao Xie,Peng Wan,Guijie Chen,Chunxu Chen,Dan Chen,Shijie Yu,Xiaoxiong Zeng,Yi Sun
Dicaffeoylquinic acids (DiCQAs), the main components of kudingcha made from the leaves of Ilex kudingcha, could be transformed by gut microbiota. However, the information about the related microorganisms and enzymes involved in the biotransformation of DiCQAs in the human gut is limited. Therefore, a strain of bacteria that could hydrolyze DiCQAs, belonging to Lactobacillus fermentum named L. fermentum LF-12, was isolated from human feces in the present study. Furthermore, an esterase for the hydrolysis of DiCQAs was purified from L. fermentum LF-12 and heterogeneously expressed in Escherichia coli. The esterase could be induced to exert superior hydrolytic activity in the presence of lactose as the carbon source. The molecular weight of the purified esterase was determined to be 31.9 kDa, and the isoelectric point, optimal pH and temperature for the esterase were 4.71, 6.5 and 45 °C, respectively. The enzyme activity was improved by Mg2+ and Ca2+, and reduced by Co2+, Cu2+, EDTA and some kinds of organic solvents. The present results provide new insights into the metabolism of DiCQAs by the human gut.
研究领域:
食品科学
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微生物学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2017
·
IF 6.32
Lu Li,Yuanyuan Fan,Qingling Li,Renjie Sheng,Haibin Si,Juan Fang,Lili Tong,Bo Tang
Various intracellular metal ions have closely related functional roles in the nervous system. An excess or deficiency of essential metal ions can contribute to neurodegenerative diseases. Thus, the detection of various metal ions in neurons is important for diagnosing and monitoring these diseases. In particular, single-cell analysis of multiple metal ions allows us to not only understand the cellular heterogeneity and differentiation but also determine the actual relationships among multiple metal ions in each individual cell. Aiming at the low efficient single-cell manipulation and interference of complex biological matrices within cells in the existing method for single-cell metal ion detection, in this manuscript, we present a convenient, sensitive, and reliable method to simultaneously identify and quantify multiple metal ions at the single-cell level using a microfluidic system. Using the combination of on-chip electrophoresis separation and multicolor fluorescence detection, we achieved the simultaneous analysis of Na+, K+, Ca2+, and Mg2+ in single PC-12 cells and studied changes in these four metal ions in Aβ25–35-treated PC-12 cells, which is a model of Alzheimer’s disease (AD). The data showed that metal ions imbalances in neuron-like cells may be associated with AD induced by Aβ25–35. This method paves the way for multiple metal ion detection in single neuron-like cells, and the results provide insights regarding synergistic function of multiple metal ions in regulation of neurological diseases at the single-cell level.
研究领域:
生物化学
·
神经科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）