SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Shiying Zou,Changjun Hou,Huanbao Fa,Liang Zhang,Yi Ma,Liang Dong,Dan Li,Danqun Huo,Mei Yang
Carbon dots doped with nitrogen and sulfur (NSCDs) was prepared from l -cysteine with a hydrothermal method and applied to develop a fluorescent sensor to determine fluazinam . Characterizations of the NSCDs suggest that it provides abundant affinitive sites for recognizing fluazinam through molecular interactions including electrostatic, π-π stacking and hydrogen bonding interactions. Strong inner filter effect (IFE) leads fluazinam to quench the fluorescence of the NSCDs with high efficiency. Under optimized conditions, the fluorescent probe shows very good sensitivity and selectivity in a linear range from 0.05 μM to 4 μM, and the detection limit is calculated down to 10 nM. The proposed fluazinam sensor is demonstrated to be feasible for application in detecting this fungicide in soil and apple samples with satisfactory accuracy. Besides, NSCDs could also be used to fabricate visual paper-based testing stripes under a portable UV lamp with a detection limit as lower as 50 μM. The fluorescent material presented here provides a functional platform for simple yet facile in-field detection of fluazinam in related samples.
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高影响因子
RSC Advances
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2017
·Vol. 7
·期 57
·35687-35693
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IF 3.108
Wenjie Gao,Yanhua Jiang,Zhihui Zhang,Yifang Zhang,Yanyan Liu,Yanhong Zhou,Xin Liu
Conventional protocols for cellular N-glycan profiling often need several time-consuming and labor-intensive steps, and a large amount of material (5–20 × 106 cells) is required. In this study, an optimized co-derivatization method was applied for convenient, rapid and highly-sensitive analysis of cellular N-glycan. Taking human cervical carcinoma cells (HeLa) as a model, the required amount for comprehensive cellular N-glycans analysis was reduced down to an original cell number of 105 and the total analysis time was decreased from several days to several hours. Good reproducibility of the method was also obtained with the CV averaging to less than 13.1%. In addition, compared to permethylation derivatization, more than 5-fold sensitivity improvement was achieved and more concise and clear mass spectra were obtained with the new developed method. As a preliminary study, this method was also successfully applied to reveal the difference in cellular N-glycan profiling of two heterogeneous live cell lines, human normal liver cells (L-02) and human hepatocyte carcinoma cells (HepG2), showing great potential for high-throughput analysis of N-glycans from limited cell samples, such as primary cell lines, cells obtained from cell sorting and small size cancer specimens.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2017
·
IF 2.843
Jianhua Liu,Junzhi Li,Liqun Xu,Yajuan Qiao,Jiucun Chen
In this work, multifunctional B,N codoped carbon dots (B/N–C-dots) were synthesized from a facile hydrothermal treatment of branched polyethylenimine and 4-formylphenylboronic acid. The obtained B/N–C-dots had a very narrow size distribution and showed excitation-wavelength-dependent photoluminescence properties with a high fluorescence quantum yield (QY) of 15.85%. The B/N–C-dots showed temperature and pH (3–13) dual responses. Additionally, the B/N–C-dots showed a good sensitivity and selectivity to Fe3+ with a detection limit of 1.62 μM. What is more, the as-prepared B/N–C-dots exhibited low toxicity and good biocompatibility and could be used for cell imaging. Considering these good properties, the obtained B/N–C-dots have good potential for temperature, pH, and ion sensors and cellular imaging.
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CHEMICAL ENGINEERING JOURNAL
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2016
·
IF 5.31
Qianqian Huang,Jiayin Zhang,Zhengyu He,Penghui Shi,Xin Qin,Weifeng Yao
N-doped carbon materials have great potential as functional materials for water pollution control. However, the synthesis of green and sustainable N-doped carbon catalysts face numerous challenges. This study uses a thermal treatment by directly heating a homogeneous mixture of cobalt acetate and dimethylglyoxime to synthesize lamellar ordering Co 3 O 4 /N/C compounds. Dimethylglyoxime was chosen to play duple roles as both nitrogen and carbon source. The obtained N-doped carbon material was used as a catalyst for effective aniline degradation by activating peroxymonosulfate (PMS). In this approach, nanomaterials with good catalytic performance, high stability, and magnetic property can be obtained, which facilitate recycle convenience. In this study, graphitic N is found to improve electron mobility, and the lone pair of pyrrolic-like N electrons tends to form effective Co-N 4 moieties with Co species, which can increase the catalyst activity. Therefore, the prepared catalyst has higher activity than individual Co 3 O 4 . Furthermore, the effects of N-doped carbon materials on aniline degradation by activated PMS and the proposed reaction pathways for the mineralization of aniline were explain in detailed.
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高影响因子
TALANTA
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2016
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IF 4.035
Fang Gao,Shiyao Ma,Xincai Xiao,Yan Hu,Dan Zhao,Zhike He
Despite of the importance of enantiomers , the fluorescence sensing of enantiomers and the interpretation of the “preferential interaction” still remain insufficiently explored. In this study, we report the recognition of tyrosine (Tyr) enantiomers by chiral N -acetyl- L -cysteine ( L -NAC) capped CdSe/CdS quantum dots (QDs) under alkaline experimental condition. L -Tyr could greatly quench the fluorescence of CdSe/CdS QDs, while D -Tyr displayed no effect on the fluorescence. The one-step synthesized chiral L -NAC-CdSe/CdS QDs demonstrated high selectivity for Tyr enantiomers. In particular, the mechanism of chiral recognition has been studied by UV/vis absorption spectra and circular dichroism (CD) spectra. The changes of intensity and sign of CD spectra corroborated the attachment of L -Tyr to the surface of QDs, which may be valuable aids in obtaining a better understanding of the possible mechanism of enantioselective recognition.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Yixin Kuang,Suxin Zhou,Cheng Mao,Xiaoying Feng,Juan Zheng,Gangfeng Ouyang
High-resolution separation of numerous isomers is highly desirable for their high-quality analysis, yet challenging, which puts forward high requirements on the precise design of stationary phase. Herein, flexible 4- tert -butylcalix[n]arenes (TBCx[n]s) with different cavities have been intelligently integrated with in-situ grown UiO-66 coatings, to investigate their separation efficiencies for alkane and substituted benzene isomers. The modifications of UiO-66 with TBCx[n]s have made up for the deficiency of UiO-66 on the separation of ethylbenzene and styrene. The effects of TBCx[n]s on the separation performance of UiO-66@TBCx[n]s have demonstrated distinct regularities, i.e., the effects of TBCx[6] are superior to those of TBCx[8], while the TBCx[4] is the least effective. The baseline separation of all analytes has been achieved by the UiO-66@TBCx[6] column with enhanced selectivity and improved separation resolution (Rs). For the six groups of isomers that are most difficult to separate, the corresponding selectivity and Rs are greater than 1.09 and 5.48, respectively, confirming the outstanding separation performance of the UiO-66@TBCx[6] column and the feasibility of integrating soft supramolecule and rigid MOF.
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FOOD CHEMISTRY
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2024
·
IF 8.5
Lei Cai,Xiyu Mou,Jieshee Hong,Chun Cui
With the improvement of people's living standards and health awareness, reducing salt, sugar, and fat is gradually becoming the mainstream trend. In this work, we delved into the development of an innovative taste enhancer, N-lauroyl theanine (NLT), and its taste presentation mechanism. NLT was synthesized in the aqueous phase by enzyme-catalyzed and direct-heating methods using food-grade enzymes in yields of up to 64.33 % and 49.11 %, respectively. Sensory evaluation and molecular docking techniques revealed the potential of NLT to enhance salty, umami, sweet, and kokumi taste sensations and its taste presentation mechanism. Results revealed significant taste enhancement of saltiness, umami, sweetness, and kokumi and prolonged their duration in the oral cavity by 0.25–1 mg/L NLT. Molecular docking analyses showed that NLT had a strong binding affinity for a variety of taste receptors. These findings highlight the potential of NLT as a potent taste enhancer for the development of healthier salt/sugar-reduced foods.
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高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2024
·
IF 2.2
Xuyao Tang,Yang Wang,Junwei Cui,Ke Zhang,Shengshan Bi
In this work, n -hexane, cyclohexane and 2-methylpentane were selected to represent linear-alkane, cycloalkane and branched-alkane, respectively. Based on the dynamic light method (DLS), the viscosity, interfacial tension and diffusion coefficient of n -hexane/CO 2 , cyclohexane/CO 2 and 2-methylpentane/CO 2 systems under saturation condition were measured in order to explore the change trend of thermophysical properties of the systems with the same carbon atom number but different molecular structures. The experiments were conducted at the temperatures of 303, 343 and 383 K and at pressures up to 5.64 MPa. The expanded uncertainties（ k = 2）of dynamic viscosity, interfacial tension and diffusion coefficient were 3 %, 3 % and 4.4 % respectively. The experimental results show that n -hexane and 2-methylpentane with similar molecular structure have more similar value of the properties. The effects of different alkane structures on system viscosity, interfacial tension, and diffusion coefficient were explained at the molecular level through radial distribution function, interface thickness, and CO 2 coordination number. At 303.15 K and 4 MPa, the peak radial distribution function of CO 2 /cyclohexane is 1.845, which is greater than that of CO 2 /n-hexane and CO 2 /2-methylpentane molecules. It has been proven that the arrangement of CO 2 /cyclohexane is more orderly, resulting in higher viscosity and lower diffusion coefficient of the system. The interface thickness of CO 2 /cyclohexane is 6.13 nm, which is smaller than CO 2 / n -hexane (7.53 nm) and CO 2 /2-methylpentane (6.3 nm). The smaller the interface thickness, the more compact the structure, the stronger the intermolecular forces, and the greater the interfacial tension. At 303.15 K and 2 MPa, the number of CO 2 coordination sites within 1 nm around liquid phase alkanes is 3.96, which is smaller than 4.78 for cyclohexane and 6.62 for 2-methylpentane. Prove that the coordination number is directly proportional to the diffusion coefficient and inversely proportional to viscosity and interfacial tension.
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JOURNAL OF MEMBRANE SCIENCE
·
2024
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IF 8.4
Yanling Chai,Jinchao Chen,Xiaofeng Fang,Fang Li,Xingran Zhang
Polyelectrolyte multilayer nanofiltration (NF) membranes have garnered attention for their potential in Mg 2 ⁺/Li⁺ separation applications, particularly due to their positively charged nature and the versatility offered by the layer-by-layer (LbL) self-assembly technique. However, these membranes often face significant challenges in balancing high ion selectivity with adequate water permeability. Addressing these limitations, this study introduces a novel approach by grafting a zwitterionic material, trimethylamine N-oxide (TMAO), onto polyacrylamide hydrochloride (PAH), creating a new cationic polyelectrolyte (TPAH). By cyclically depositing sodium polystyrene sulfonate (PSS) and TPAH onto a polyethersulfone (PES) substrate, we have successfully fabricated a high-performance NF membrane ( i.e. , (PSS/TPAH) n ) that demonstrates enhanced Mg 2 ⁺/Li⁺ selectivity with high water permeability. TMAO features shorter distances between its positive and negative charge groups and smaller dipoles compared to other zwitterions. These characteristics enhance its ability to resistance to salt effects and transfer charge from amine oxide to water molecule. Furthermore, the grafting of TMAO enhanced the hydrophilicity of TPAH and regulated the charge distribution of the polyelectrolyte. Compared to the control membrane (PSS/PAH) n , the optimized membrane (PSS/TPAH) n showed reduced rejection of LiCl from 60.9 ± 2.7 % to 35.9 ± 1.5 %, while that of MgCl 2 increased from 94.3 ± 1.6 % to 96.1 ± 0.7 %. Additionally, water permeability improved from 9.2 ± 0.9 LMH/bar to 16.1 ± 0.5 LMH/bar. Notably, the membranes exhibited an improved selectivity for Mg 2+ /Li + ions in synthetic saline, reaching a maximum of 30.5 ± 1.5, highlighting its potential for practical separation applications. Density functional theory simulations indicate that TMAO not only enhances Donnan effect and intensify ion dehydration of polyelectrolyte multilayers NF membranes but also increases their hydrophilicity. In general, these polyelectrolyte multilayers NF membranes exhibit considerable promise for multiple applications, such as seawater pretreatment, groundwater softening and lithium extraction.
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Journal of Materials Chemistry B
·
2024
·
IF 6.1
Gong Chen,Yuan Yuan,Ying Li,Zushun Xu,Qianyuan He,Zizhen Qin,Han Hu,Congcong Gao,Qi Xu,Qinglei Gao,Fei Li
Oncolytic virus ablation of tumor cells has the advantages of high tumor selectivity, strong immunogenicity and low side effects. However, the recognition and clearance of oncolytic viruses by the immune system is the main reason that limits their anti-tumor efficiency. As a highly biosafe and highly modifiable oncolytic virus vector, acrylamide can improve the long-term circulation of oncolytic viruses, but it is limited in its uptake efficiency by tumor cells. Herein, we constructed a N- hydroxymethyl acrylamide -b-(N-3- aminopropyl methacrylamide) -b-DMC block copolymers (NMA-b-APMA-b-DMA, NAD) as an oncolytic virus carrier, which not only improves the long-term circulation of oncolytic viruses in the body but also has excellent loading oncolytic virus stability. The data shows that no obvious difference in the transfection effect of the NAD/Ad complex with or without neutralizing antibody in the medium, which meant that the cationic carrier mediated by NAD/Ad had good serum stability. Only 10 micrograms of NAD carrier are needed to load the oncolytic virus, which can increase the transfection efficiency by 50 times. Cell experiments and mouse animal experiments show that NAD vector can significantly enhance the anti-tumor effect of oncolytic viruses. We hope that this work will promote the application of acrylamide as an oncolytic virus vector and provide new ideas for modification methods of acrylamide for biomedical applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Xingyu Zhan,Yunxiong Zeng,Bo Hong,Xinqing Wang,Yingchun Xia
Artificial photosynthesis for H 2 O 2 production through O 2 reduction is a sustainable and cost-effective technology for the scientific and industrial communities. Metal-free polymeric carbon nitride (CN) is a promising visible-light responsive semiconductive material for photocatalytic H 2 O 2 production. However, its inherently disordered and amorphous structure limits its performance improvement due to high photogenerated carrier complexation and sluggish interlayer charge transfer. Here, we report a high-performance S-type heterojunction, composed of CeO 2 coupled with N -vacancy-rich CN (CeO 2 /Nv-CN), that enhances the photocatalysis of H 2 O 2 production under visible light. The prepared CeO 2 /Nv-CN showed an H 2 O 2 generation rate of up to 69.79 mmol·g −1 ·h −1 , 48.80-fold higher than CN and had an apparent quantum yield of 13.8 % at 400 nm. A synergistic effect among CeO 2 , N -vacancies (Nv) and S-type heterojunction is responsible for such an excellent activity, which increased the O 2 and light absorption sites, built rapid charge diffusion channels, and enhanced two-electron O 2 reduction. This work demonstrates the potential of incorporating nanosized CeO 2 with CN to achieve high-performance photocatalytic H 2 O 2 production, opening new avenues for designing highly efficient polymeric composite photocatalysts for energy conservation.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Zenghui Li,Weichao Qin,Juan Wang,Xianyang Meng,Jian Yang,Jiangtao Wu
Biofuels are increasingly recognized as the most practical way to reduce carbon dioxide emissions and pollution in the transport industry. However, the production and promotion of biofuels have encountered many obstacles due to their complex composition and the ambiguity in studies on the physicochemical properties. To achieve a thorough comprehension of biofuel density and viscosity properties, developing suitable surrogate mixtures is an accurate and efficient method. N-Octane, ethylcyclohexane, and ethylbenzene are important components of biofuel surrogate mixtures to reflect the thermophysical properties of three primary hydrocarbons (alkanes, cycloalkanes, and alkylbenzenes). Therefore, the liquid density and viscosity of ternary mixtures (n-octane + ethylcyclohexane + ethylbenzene) are measured using a vibrating-tube densimeter and vibrating-wire viscometer, respectively, over the temperature range from 283.15 to 363.15 K and at pressures of up to 60 MPa. Moreover, the excess volume and viscosity deviations of the mixtures were obtained. For density, the group contribution (GC) PC-statistical associating fluid theory (PC-SAFT) equation of state (EoS) and SAFT-γ Mie EoS have been compared to assess the effect of different interaction potential functions on the prediction of liquid-phase densities. The results showed that the SAFT-γ Mie EoS gave the best prediction, followed by the GC PC-SAFT EoS. In terms of viscosity, a new mapping law for effective molecular weight has been developed to improve the predictive accuracy of the 1-cEHS model, and the absolute average deviations (AAD%) are 3.3–5%. In addition, excess molar volumes and viscosity deviations in this work are derived and discussed to further explore the influence of different molecular structures on thermophysical properties.
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