COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2017
·
IF 2.714
Ying Zhang,Haijian Ou,Huixian Liu,Yangli Ke,Weiju Zhang,Guiying Liao,Dongsheng Wang
In this study, polyimide (PI)-based carbon nanofibers (CNFs) were prepared via electrospining polyamic acid solutions followed by thermal imidization and carbonization . And its versatile adsorption performance for removal of 2,4-dichlorophenol (2,4-DCP), methylene blue (MB) and tetracycline (TC) was evaluated. PI-based CNFs with a high specific surface area of 715.89 m 2 g −1 exhibited a maximum adsorption of 483.09 mg g −1 , 272.48 mg g −1 and 146.63 mg g −1 for 2,4-DCP, MB and TC, respectively. The MB adsorption efficiency was highly pH-dependent with an optimal pH 11, while the CNFs performed well towards TC and 2,4-DCP adsorption in the wide pH range of 4–7 and 3–7. Kinetics and isotherm experiments were fitted well with pseudo-second-order kinetics model and Langmuir model, respectively. Thermodynamic parameters showed that adsorption was spontaneous and endothermic. Moreover, the reusability of PI-based CNFs was evaluated, and the result showed that the removal of 2,4-DCP, TC and MB was kept its high efficiency after 5 consecutive cycles. This study demonstrated that the CNFs should be a powerful adsorbent for the removal of a great number of organic pollutants from aqueous environments.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2023
·
IF 8.7
Ludi Song,Lvren Lin,Wenjia Wei,Shengkun Zhang,Lei Wan,Zimo Lou,Jianming Yu,Xinhua Xu
Mechanochemical (MC) remediation with zero-valent iron (ZVI) as co-milling agent enables the non-combustion and solvent-free disposal of solid halogenated organic pollutants (HOPs) via solid-phase reaction, but suffers from incomplete dechlorination (especially for less chlorinated chemicals). Herein, a reduction-oxidation coupling strategy using ZVI and peroxydisulfate as synergistic (ZVI-PDS) co-milling agents was investigated, with 2,4-dichlorophenol (2,4-DCP) as probe contaminant. By revisiting the MC destruction process of 2,4-DCP by ZVI, the contribution of both reductive and oxidative routes is confirmed, and the inefficient •OH generation is addressed. With ball-to-material and reagent-to-pollutant mass ratios of 30:1 and 13:1, respectively, ZVI-PDS achieves higher dechlorination ratio (86.8%) for 2,4-DCP within 5 h, outcompeting sole ZVI (40.3%) or PDS (33.9%), due to the accumulation of numerous SO 4 •− . As suggested by a two-compartment kinetic model , the optimal ZVI/PDS molar ratio of 4:1 is determined, which balances the relative contribution of reductive/oxidative routes and leads to a maximum mineralization efficiency of 77.4%. The analysis on product distribution verifies the generation of dechlorinated, ring-opening and minor coupling products (with low acute toxicity). This work validates the necessity to couple reduction with oxidation in MC destruction for solid HOPs, and may provide information on reagent formulation.
研究领域:
环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 6
·2569
·
IF 4.6
Yu Liang,Xinyan Chen,Jianli Zeng,Junqing Ye,Bin He,Wenjin Li,Jian Sun
Laccase immobilization is a promising method that can be used for the recyclable treatment of refractory phenolic pollutants (e.g., chlorophenols) under mild conditions, but the method is still hindered by the trade-off limits of supports in terms of their high specific surface area and rich functional groups. Herein, confined polymerization was applied to create abundant amino-functionalized polymeric ionic liquids (PILs) featuring a highly specific surface area and mesoporous structure for chemically immobilizing laccase. Benefiting from this strategy, the specific surface area of the as-synthesized PILs was significantly increased by 60-fold, from 5 to 302 m2/g. Further, a maximum activity recovery of 82% towards laccase was recorded. The tolerance and circulation of the immobilized laccase under harsh operating conditions were significantly improved, and the immobilized laccase retained more than 84% of its initial activity after 15 days. After 10 cycles, the immobilized laccase was still able to maintain 80% of its activity. Compared with the free laccase, the immobilized laccase exhibited enhanced stability in the biodegradation of 2,4-dichlorophenol (2,4-DCP), recording around 80% (seven cycles) efficiency. It is proposed that the synergistic effect between PILs and laccase plays an important role in the enhancement of stability and activity in phenolic pollutant degradation. This work provides a strategy for the development of synthetic methods for PILs and the improvement of immobilized laccase stability.Keywords:polymeric ionic liquids;confined polymerization;laccase;immobilization;2,4-DCP;removal
研究领域:
环境生物学
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生物技术
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产品关联
DOI
PubMed
高影响因子
RSC Advances
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2015
·Vol. 5
·期 69
·56286-56292
·
IF 3.84
Bo Zhang,Zhaoping Zhong,Qinglong Xie,Paul Chen,Roger Ruan
In order to reduce coke yield during catalytic fast pyrolysis of biomass, MgO and 2,4-dimethylquinoline (2,4-DMQ) were selected to reduce the number of external acid sites of HZSM-5. Both MgO and 2,4-DMQ deposition could cause a reduction in total acid sites (both weak acid sites and strong acid sites) and external acid sites of HZSM-5. The modified catalysts were used for the catalytic conversion of bio-derived furan. For the MgO/HZSM-5 catalyst, the effects of amount of MgO deposited and deposition time were studied. The carbon yields of aromatics, C2–C5 olefins, total chemicals, CO2 and CO increased at first and then decreased slightly when the deposited amount increased, while the carbon yield of coke decreased first and then increased gradually. Furthermore, as the deposited time increased, the carbon yields of petrochemicals, CO2 and CO increased greatly, whereas that of coke decreased. For the 2,4-DMQ/HZSM-5 catalyst, the effects of 2,4-DMQ treatment amount and treatment time were investigated. The experimental results showed that an increase in 2,4-DMQ treatment amount or treatment time could retard the generation of the target products, CO2 and CO but promote coke formation.
研究领域:
能源化学
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催化化学
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DOI
高影响因子
CELLULOSE
·
2015
·Vol. 22
·期 5
·3189-3198
·
IF 3.573
Man Xiaolin,Wu Ronglan,Jiang Xue,Xu Shimei,Wang Wei
We report a study on the synthesis of a nanocomposite that contains anatase titania (TiO 2 ) particles, organo-montmorillonite (OMMT) and cellulose-g-poly(methyl methacrylate) (cellulose-g-PMMA), and the application of the nanocomposite as a photocatalyst in degradation of 2,4-dichlorophenol (2,4-DCP). The nanocomposite was characterized by Fourier-transform infrared spectra, X-ray diffraction, transmission electron microscopy and scanning electron microscopy. The photocatalytic activity of the nanocomposite was evaluated by the photoreaction of 2,4-DCP. We compared the photocatalytic activity of the nanocomposite in the presence or absence of OMMT, PMMA and TiO 2 . The photocatalytic activity of the nanocomposite was also compared with commercial TiO 2 nanoparticles. The synthetic nanocomposite exhibits the highest photocatalytic activity. After the fourth time recycling, the nanocomposite still maintains more than 90 % of its photocatalytic activity.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2017
·
IF 5.401
Tianrong Zhan,Zhengwei Tan,Xia Tian,Wanguo Hou
Self-assembly of graphene oxide (GO) and Au nanoparticles (AuNPs) was covalently modified by ionic liquid (IL) containing amino groups to prepare the ternary nanocomposite of IL-GO-AuNPs. UV, IR spectra, X-ray power diffraction and scanning electron microscope confirmed the successful hybridization of these three components, leading to the larger surface area and better dispersity. Then a sensitive 2,4-Dichlorophenol (2,4-DCP) sensor was established based on IL-GO-AuNPs modified glassy carbon electrode. The IL-GO-AuNPs composite gave rise to a desirable access to the electron transfer and electrocatalytic capacity toward the oxidation of 2,4-DCP. Differential pulse voltammetry was employed for the quantitative analysis of 2,4-DCP. The proposed sensor showed a wide linear range from 0.01 to 5 μM with a low detection limit of 3 nM (S/N = 3). The developed sensor was successfully used for the determination of 2,4-DCP in water samples with satisfactory recoveries and stability. The excellent electrocatalytic performance could be attributed to the high conductivity and more active sites of IL-GO-AuNPs.
研究领域:
分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Food Frontiers
·
2026
·Vol. 7
·期 4
·e70276
·
IF 6.3
Xinyi Li,Jingling Kang,Weiyao Wu,Huifan Liu,Yuming Zhong
Tea polyphenols (TP) constitute key functional components in tea leaves, yet their instability during human digestion limits absorption. This study selected 24 representative tea varieties to establish an in vitro dynamic digestion model, investigating the dynamic changes of TP during digestion. Characteristic signals of tea liquor were collected using electronic nose and color difference technology to construct predictive models, enabling the estimation of TP content (TPC) before and after digestion. Results indicate the tea liquor aroma is dominated by hydrogen compounds, and tea fermentation level correlates positively with liquor color intensity. Green tea exhibits the highest TPC and catechin levels, demonstrating potent antioxidant properties. TP remains relatively stable in the stomach but is significantly reduced in the intestine, whilst the catechin components exhibit distinct degradation patterns. The Extreme Gradient Boosting (XGBoost) model predicting TPC based on electronic nose data demonstrated the highest efficacy, with an R 2 : 0.92. The XGBoost model incorporating color difference and TPC achieved the best performance, with an R 2 : 0.81. This research provides robust support for elucidating TP digestion patterns in humans and establishing a tea quality assessment system.
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DOI
高影响因子
BIOMACROMOLECULES
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2026
·
IF 5.9
Guangli Li,Xionghaolan Liu,Xinwei Yan,Nayu Chen,Yuan Jin,Nanke Ma
Abstract Hydrogel-based sensors face two persistent challenges: freeze-induced performance failure at sub-zero temperatures and an inherent trade-off between mechanical robustness and electrical conductivity. To address these issues, a triple-network hydrogel composed of polyacrylamide, gelatin, and carboxymethyl cellulose was designed, synergistically integrated with LiCl, CaCl2, and glycerol. In this design, glycerol serves as the primary cryoprotectant, Li+ ions provide ionic conduction, and Ca2+ crosslinks reinforce the polymer network. The optimized hydrogel achieves high tensile strength (576 kPa), ultra-high stretchability (938%), outstanding toughness (233.4 kJ/m3), and high conductivity (2.95 S/m), while completely suppressing ice crystallization down to −80 °C. As a strain sensor, it delivers a gauge factor of 3.53 after freezing; as a bioelectrode, it records high-quality EMG, ECG, EOG, and EEG signals comparable to or surpassing commercial Ag/AgCl electrodes, and maintains reliable performance over 24 h at −20 °C. This work demonstrates a durable material candidate for long-term wearable sensing and biopotential recording in sub-zero environments.
✓ 已验证
DOI
高影响因子
JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH
·
2025
·Vol. 44
·期 1
·1-22
·
IF 12.8
Zhu Susi,Zhang Xu,Liu Waner,Zhou Zhe,Xiong Siyu,Chen Xiang,Peng Cong
Background Melanoma, a highly aggressive and immunogenic skin cancer, often develops resistance to immunotherapy due to the immunosuppressive tumor microenvironment (TME). Although PD-1/PD-L1 inhibitors have significantly improved treatment outcomes, 30%-40% of patients exhibit no response or develop resistance. Mechanisms such as T-cell exhaustion within the TME limit therapeutic efficacy, necessitating the exploration of novel strategies to enhance immune responses. Methods This study evaluated the effects of Vinburnine (Vin) on melanoma cell proliferation, migration, invasion, apoptosis, and DNA damage through in vitro experiments. Transcriptomic analysis, Western blot, RT-PCR, dual-luciferase reporter assays, and ChIP experiments revealed the mechanism by which Vin regulates IL-24 via ATF3. The anti-tumor efficacy of Vin or IL-24 in combination with PD-1 monoclonal antibody, as well as their modulation of the tumor microenvironment, were validated through luciferase-mediated cytotoxicity assays and a murine melanoma model. Additionally, the correlation between IL-24 expression and patient prognosis or immunotherapy response was analyzed using public databases. Results This study delineates the phenotypic mechanisms by which vinburnine suppresses melanoma proliferation. Vin induces reactive oxygen species (ROS) generation, leading to DNA damage and the subsequent activation of the apoptotic cascade in melanoma cells. Additionally, vinburnine activates the P38/MAPK/ATF3 signaling axis, which drives the secretion of interleukin-24 (IL-24), enhancing the functionality of CD8 + T cells and modulating the tumor immune microenvironment to favor antitumor immunity. Notably, the combination of vinburnine with anti-PD-1 antibody therapy produces synergistic effects, effectively addressing certain limitations of current immunotherapeutic approaches. Conclusions These findings underscore the therapeutic potential of vinburnine, particularly when used in combination with immune checkpoint inhibitors, as a promising strategy for melanoma treatment.
研究领域:
肿瘤学
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免疫学
·
药理学
·
分子生物学
·
细胞生物学
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生物化学
·
转化医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Processes
·
2024
·Vol. 12
·期 3
·498
·
IF 2.8
Xiaoming Zeng,Hao He,Liejiang Yuan,Haizhi Wu,Cong Zhou
A combined dispersed liquid–liquid microextraction (DLLME) and chromatography (GC) method was developed for the determination of 24 aromatic substances in rosemary hydrosol in this work. The pretreatment method of DLLME was optimized by carefully selecting the appropriate extraction agents, dispersants, and their respective amounts. With carbon tetrachloride as the extractant and acetone as the dispersant, the enrichment factor of DLLME is 13.3, and the 24 target substances such as eucalyptol, camphor and verbenone can be separated within 31 min and quantified by an external standard method using gas chromatography (GC). The correlation coefficient r2of the linear regression equation is within the range of 0.9983 to 0.9991. The detection limit of the method was 0.02 mg/L, the recovery rate of the spiked solution was 76.4–118.4%, the relative standard deviation was 0.4–6.9% and the method was used to detect the semi-finished products of rosemary hydrosol and the finished rosemary hydrosol sold on the market. This method also provides a reference for the qualitative and quantitative determination of aromatic substances in other hydrosols.
研究领域:
分析化学
·
环境科学
·
植物化学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yinan Li,Liulian Huang,Zhibin He,Jianguo Li,Chenglong Fu,Qinghong Zheng,Lihui Chen,Yonghao Ni
Solar-driven evaporators have emerged as a sustainable strategy for water purification and energy harvesting. Designing advanced systems that achieve high evaporation performance, long-term operational stability, and resistance to salt crystallization remains a significant challenge. In this study, an innovative Janus membrane is proposed that addresses these challenges, featuring a super hydrophilic cellulose nanofiber (CNF)@Hexadecyl Trimethyl Ammonium Bromide (CTAB)-MXene layer and a superhydrophobic polytetrafluoroethylene (PTFE) layer. CTAB modification of MXene enhances its interlayer spacing and specific surface area, enabling rapid water transport and efficient solar energy absorption of the CNF@CTAB-MXene layer. A PTFE layer is sputter-deposited onto CNF@CTAB-MXene layer, effectively preventing salt accumulation and membrane fouling, with plasma pre-treatment ensuring excellent interfacial bonding between these two layers. Under 1 sun illumination, the CNF@CTAB-MXene/PTFE Janus evaporator achieves a remarkable evaporation rate of 1.51 kg m −2 h −1 with outstanding salt resistance. The synergy between superhydrophilic and superhydrophobic layers facilitates efficient water transport while maintaining long-term stability without performance degradation. Additionally, the evaporator generates a voltage of 343.8 mV during thermoelectric power generation, and its unique design allows electricity generation from wind energy at night. This integrated system provides an advanced and durable solution for water-power co-generation, offering practical benefits for off-grid or remote regions.
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
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2018
·
IF 2.196
Chao Su,Chenyang Zhu,Feng Yang,Zheng Ye,Xiangyang Liu,Maogang He
The isobaric molar heat capacities of ethyl octanoate and ethyl decanoate were determined at T = 294–354 K and p = 0.1–24 MPa. The measurements were conducted by a flow calorimeter. The measured results were in good agreements with several available experimental data at atmosphere pressure and the calculated results at high pressure in literatures. Furthermore, a fitting equation was presented to calculate the Cp of ethyl octanoate and ethyl decanoate. The maximum absolute relative deviations between experimental results and calculated data are lower than 0.4%.
研究领域:
物理化学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）