LANGMUIR
·
2021
·
IF 3.882
Chenxi Wang,Chao Qiu,Chen Zhan,David Julian McClements,Yang Qin,Aiquan Jiao,Zhengyu Jin,Jinpeng Wang
A relatively straightforward green method to fabricate robust hydrophobic sponges for effective removal of oil pollutants and other organic contaminants was developed. These sponges were constructed from bio-sources: citronellal and palmitic acid-modified aminoethyl cyclodextrin-sodium phytate-chitosan (ACCTCS). The modified sponge exhibited desirable mechanical properties and strong hydrophobicity with a water contact angle (WCA) of 147.8°. Scanning electron microscopy showed that the ACCTCS sponge had a highly porous structure that was particularly suitable for organic component absorption. The sponge exhibited excellent absorption capacities for n-hexane, trichloromethane, vacuum pump oil, and peanut oil (47.9, 32.3, 32.6, and 32.2 g/g, respectively). The removal rate of oil was more than 80% (>26.2 g/g) after 10 absorption–desorption cycles. The ACCTCS sponge also showed good oil/water and organic components/water separation performance. The bio-source materials, green preparation method, and new absorbed-oil recovery strategy provided a novel pathway to construct multifunctional absorbents for oil/water separation in industrial wastewater.
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PubMed
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Jiao Zou,Guoqing Zhao,Jin-Feng Guan,Xinyu Jiang,Jin-Gang Yu
A stable and effective chiral electrochemical sensor was designed to selectively identify tyrosine (Tyr) enantiomers by square wave voltammetry (SWV). Single-layer graphene oxide (SGO) and amino-β-cyclodextrin (NH2-βCD) were integrated through an amidation reaction and then assembled with black phosphorus nanosheets (BPNSs) with a puckered orthorhombic layered structure to construct a chiral composite, which was used to modify a glassy carbon electrode to obtain a chiral electrochemical sensor (SGO-NH2-βCD/BPNSs/GCE). Compared with the previously reported results, the covalent coupling and self-assembly methodologies for the preparation of SGO-NH2-βCD/BPNSs/GCE greatly improved its recognition efficiency for Tyr enantiomers. SGO-NH2-βCD/BPNSs/GCE showed a relatively higher affinity for d-Tyr with a lower oxidation peak potential and a higher oxidation peak current. Due to the different steric hindrances, the selective formation of hydrogen bonds among the hydroxyl/carboxyl groups of SGO-NH2-βCD/BPNSs and the amino/carboxyl/phenolic hydroxyl groups of d-Tyr derived from the more suitable intermolecular distances, and the P–O interaction between SGO-NH2-βCD/BPNSs and the phenolic hydroxyl/carboxyl groups of Tyr, better identification efficiency (ΔEp = ED – EL = 36 mV and ID/IL = 1.94/ΔI = 8.89 μA) could be observed. Importantly, the concentrations of Tyr enantiomers had a good linear relationship with the peak currents, and the percentages of d-Tyr in racemic Tyr mixtures could be predicted at SGO-NH2-βCD/BPNSs/GCE, confirming its ability in detection and quantitative analysis of Tyr enantiomers.
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高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 9
·期 1
·2101218
·
IF 6.147
Hongzhou Shen,Chenglong Zhang,Changru Zhang,Jun Shi,Steve GF. Shen,Yuan Yuan,Jiawen Si
The recently developed poly(ethylene glycol)ylated poly(glycerol sebacate)/β-tricalcium phosphate (PEGS/β-TCP) membrane possesses favorable mechanical properties and excellent osteogenic activity. This study is designed to evaluate the feasibility of applying PEGS/β-TCP membrane in guided bone regeneration (GBR) through investigating the in vitro and in vivo activities of macrophages promoted by PEGS/β-TCP membranes during osteogenesis. The behavior of macrophages seeded on PEGS/β-TCP and PEGS membranes is assessed in terms of cell viability, polarization pattern, and release of inflammatory and osteogenic cytokines. The in vitro osteogenic effect of PEGS/β-TCP membrane-associated macrophage polarization is evaluated by incubating mesenchymal stem cells (MSCs) with conditioned medium derived from macrophages stimulated with PEGS/β-TCP or PEGS membranes. The in vivo correlation between macrophage polarization and PEGS/β-TCP membrane-driven osteogenesis is investigated using a rat calvarial defect model. The results show that PEGS/β-TCP and PEGS membranes are capable of downregulating M1 polarization and upregulating M2 polarization. Compared to the PEGS membrane, the PEGS/β-TCP membrane can further alleviate local inflammatory response and significantly promote the in vitro osteogenic differentiation of MSCs and in vivo restoration of bone defects. In conclusion, the novel PEGS/β-TCP membrane can promote the osteogenic commitment of MSCs and restore calvarial bone defects by improving the macrophage polarization pattern.
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高影响因子
Nano Research
·
2021
·Vol. 15
·期 4
·3387-3397
·
IF 8.897
Ma Yuanyuan,Ye Zhongju,Zhang Chen,Zhao Yanjun,Luo Hai-bin,Xiao Lehui
The progression of Alzheimer’s disease (AD) is characterized with the deposition and aggregation of β-amyloid (Aβ). Visualizing Aβ aggregates at high spatial resolution is beneficial for AD diagnosis and treatment. Herein, we designed a new molecule by conjugating corannulene (Cor) with rhodamine B isothiocyanate (Rhb), namely Cor-Rhb, for the nanoscopic imaging and modulating Aβ peptide fibrillation. The low duty cycle, high photon output and sufficient switching cycles enable Cor-Rhb suitable for localization-based nanoscopic fluorescence imaging. We find that Cor-Rhb can inhibit Aβ peptides fibrillization and interact directly with mature fibrils, triggering their disaggregation under light illumination. Noticeably reduced Aβ-mediated cytotoxicity after the addition of Cor-Rhb is also confirmed. These explorations suggest that Cor-Rhb displays great potential as a multifunctional therapeutic agent against amyloid-related diseases, and may largely facilitate a variety of super-resolution based biological applications.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Shiqing Li,Yating Zhang,Yexin Zu,Yiting Chen,Fang Luo,Da Huang,Zuquan Weng,Bin Qiu,Zhenyu Lin
All-inorganic perovskite quantum dots (CsPbX 3 QDs) with bright photoluminescence are suitable for application in optoelectronic field, but their extreme instability and insolubility in aqueous solution limit their development in other fields. Herein, for the first time, we encapsulated CsPbBr 3 QDs using sulfobutylether-β-cyclodextrins to form nanocomposite (CsPbBr 3 @SBE-β-CD nanocomposite) with high water solubility and stability via a host-guest interaction strategy, in which the PL intensity remained above 100% of the initial value after 3 h storage in water. Hydrogen sulfide (H 2 S) is known to be an important mediator of diverse cellular functions in health and in disease, which is important to develop a selective and portable detection method for H 2 S. The obtained CsPbBr 3 @SBE-β-CD nanocomposite was employed to develop a photothermal sensor for quantitative detection of H 2 S using a thermometer as signal readout. Specifically, the obtained CsPbBr 3 @SBE-β-CD nanocomposite was used as the photothermal probe while H 2 S acted as a switch of the photothermal probe, and the photothermal sensor was triggered by the reaction between H 2 S and CsPbBr 3 @SBE-β-CD nanocomposite. Notably, the naked eye and fluorescence spectrophotometer could also be the signal readout for this strategy, and their detection range and limit of detection were not better than those of the proposed photothermal sensor. On the basis of this H 2 S-triggered photothermal sensor, H 2 S was successfully detected at a concentration as low as 5.0 µM in organs of adult zebrafish at room temperature for 10 min. Such innovative strategy enables new opportunity for the development of affordable assays, especially as point-of-care testing in low-resource settings.
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高影响因子
Nano Research
·
2021
·Vol. 15
·期 4
·3114-3121
·
IF 8.897
Li Zhijun,Leng Leipeng,Lu Xiaowen,Zhang Mingyang,Xu Qian,Horton J. Hugh,Zhu Junfa
Atomically dispersed single atom catalysts represent an ideal means of converting less valuable organics into value-added chemicals of interest with high efficiency. Herein, we describe a facile synthetic approach to create defect-containing β -FeOOH doped with isolated palladium atoms that bond covalently to the nearby oxygen and iron atoms. The presence of singly dispersed palladium atoms is confirmed by spherical aberration correction electron microscopy and extended X-ray absorption fine structure measurements. This single palladium atom catalyst manifests outstanding catalytic efficiency (conversion: 99%; selectivity 99%; turnover frequency: 2,440 h −1 ) in the selective hydrogenation of cinnamaldehyde to afford hydrocinnamaldehyde. Experimental measurements and density functional theory (DFT) calculations elucidate the high catalytic activity and the strong metal-support interaction stem from the unique coordination environment of the isolated palladium atoms. These findings may pave the way for the facile construction of single atom catalysts in a defect-mediated strategy for efficient organic transformations in heterogeneous catalysis.
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高影响因子
FOOD RESEARCH INTERNATIONAL
·
2021
·
IF 6.475
Tingting Cui,Yaowen Wu,Fanghui Fan
β -Carotene ( β - Car ) is insoluble compounds in water and liable to degradation, which has health benefits for human beings. Although layer-by-layer ( LBL ) emulsions provide a better protection for β - Car towards environmental stresses, the handling and transportation of LBL emulsions still faces restrictions. In this paper, therefore, the LBL emulsions including β-Car were carefully prepared and encapsulated to obtain vitreous encapsulated solids ( VES ) using trehalose and maltodextrins ( MD ) as wall materials. Morphological results indicated that the LBL emulsions were formed a spheric shape, in where the polyelectrolyte shell was 30 nm. The MD exhibited the characteristics of not easy to absorb moisture, suitable carrier, and good stabilizer, which could improve the stability of VES systems at studied environmental stresses. Despite compositional effects from MD and environmental stresses, LBL emulsions changed the water sorption behavior of VES as oil dispersion in storage. Strength analysis indicated that LBL emulsions lubricated systems and increased the molecular mobility of wall materials. Structural collapse, rapid color changes, and β-Car loss were confirmed in VES systems at 0.56 a w from 25 to 45 °C after 30 days of storage. Besides, a relationship between S and β-Car loss kinetics was established, where the β-Car degraded more rapidly in a sample with quicker molecular mobility of wall materials Therefore, the controlling of molecular mobility in wall materials can slow down the β -Car degradation and improve the quality and stability of lipophilic nutrients delivery systems with high total solids.
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PubMed
高影响因子
Polymers
·
2021
·Vol. 13
·期 21
·3815
·
IF 4.329
Wanxin Peng,Furui Sun,Yuke Liang,Jian Kang,Jinyao Chen,Wei Wang,Ya Cao,Ming Xiang
In this study, one of the commonly used MXene (Ti3C2Tx) and β nucleated isotactic polypropylene (β-iPP)/MXene composites of different compositions were fabricated. The effects of MXene on non-isothermal crystallization and polymorphic behavior of β-iPP/MXene composites were comparatively studied. The non-isothermal crystallization kinetics indicates that for all samples, the lower cooling rates promote composites to crystallize at higher temperatures. When MXene and β-Nucleating agent (β-NA) are added separately, the crystallization temperature of composites shifts towards higher temperatures at all cooling rates. When MXene and β-NA are added simultaneously, the composite shows different cooling rate dependence, and the effects of improving crystallization temperatures is more obvious under rapid cooling. The activation energy of four samples iPP, iPP/MXene, iPP/β-NA, and iPP/MXene/β-NA were −167.5, −185.5, −233.8, and −218.1 kJ/mol respectively, which agree with the variation tendency of crystallization temperatures. The polymorphic behavior analysis obtained from Differential Scanning calorimetry (DSC) is affected by two factors: the ability to form β-crystals and the thermal stability of β-crystals. Because β-crystals tend to recrystallize to α-crystals below a critical temperature, to eliminate the effect of β-α recrystallization, the melting curves at end temperatures Tend= 50 °C and Tend= 100 °C are comparatively studied. The results show that more thermally unstable β-crystals would participate in β-α recrystallization with higher cooling rates. Moreover, thermal stability of β-crystals is improved by adding MXene. To further verify these findings, samples of three different thermal conditions were synthesized and analyzed by DSC, X-Ray Diffraction (XRD), and Polarized Light Optical Microscopy (PLOM), and the results were consistent with the above findings. New understandings of synthesizing β-iPP/MXene composites with adjustable morphologies and polymorphic behavior were proposed.Keywords:istotactic polypropylene;MXene;nonisothermal crystallization behavior
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高影响因子
CELL TRANSPLANTATION
·
2021
·
IF 4.064
Xiao-Yu Chen,Sheng-Yong Yang,Xiao-Jie Ruan,Hong-Yue Ding,Ning-Xi Wang,Fang Liu,Jia-Chu Li,Yi Li
Methionine sulfoxide reductase B1 (MsrB1) can catalyze both free and protein-bound R-methionine sulfoxides (R-MetO) to methionine (Met). It has been reported that MsrB1 plays an important role in the development of HCC and human bone osteosarcoma. However, little is known about the functions of MsrB1 in human colorectal cancer (CRC). Herein, we detected MsrB1 expression level in CRC tissue and cell lines, and investigated the effect of MsrB1 knockdown on CRC phenotypes and possible mechanisms involved in. The results showed that MsrB1 was highly expressed in both CRC tissues and cell lines, and that cell proliferation, migration and invasion were significantly inhibited, but apoptosis was increased after MsrB1 knockdown in colorectal cancer HCT116 and RKO cell lines, compared to control siRNA group. In addition, E-cadherin protein level was increased, vimentin and Snail protein were greatly decreased after knockdown of MsrB1 in cells. Furthermore, pGSK-3β (Ser9) and β-catenin protein levels were reduced, the promoter activity of TCF/LEF construction was inhibited after MsrB1 knockdown in cells, suggesting that GSK-3β/β-catenin signaling axis was involved in the tumorigenesis of CRC. In conclusion, the oncogenic role and related mechanisms of MsrB1 in CRC discovered in our work determined the potential role of MsrB1 as a biomarker and may provide a new target for clinical therapy of CRC.
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PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 107
·期 5
·3209-3218
·
IF 3.9
Hongcheng Yang,Qian Liu,Zhan Wang,Yuandan Dong,Enzhu Li
Designing and fabricating antennas that exhibit low losses and are compact, lightweight, and highly radiation efficient are challenging in the wireless-communication field. In this study, we simulated and fabricated microstrip patch antennas using β-CaSiO 3 low-temperature co-fired ceramic (LTCC) as dielectric resonator substrate. Compact ceramics that show good microwave dielectric properties (a relative dielectric constant [ ε r ] of 6.57, high-quality factor [ Q × f ] of 35 086 GHz [@14.85 GHz], and temperature coefficient of frequency [ τ f ] of −33.56 ppm °C −1 for the optimal composition) were obtained when Li 2 O–CaO–B 2 O 3 –CuO glass was added to β-CaSiO 3 and sintered at 950°C. The high-frequency properties of these composite ceramics reveal that the dielectric constant and dielectric loss are stable in the 38−58 and 70−90 GHz ranges, respectively. Furthermore, a circularly polarized antenna fabricated using a CaSiO 3 -based ceramic shows a high radiation efficiency (92.04%) and gain (3.35 dBi) at a center frequency of 2.5 GHz. These β-CaSiO 3 composite ceramics offer promising prospects for high-frequency use as well as in mobile communication applications. This study provides insight for the development of innovative antennas with new LTCC materials.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Binbin Tan,Jing Wang,Yao Deng,Huidi Zhang,Jiang Wang,Zhihao Zhang,Wenlei Wang
The key to enhancing the activation efficiency of peroxydisulfate (PDS) lies in facilitating the adsorption of PDS and accelerating the rate of electron transfer at the interface. In this work, the oxygen vacancy (Ovs) concentration of ultrathin Bi 4 Ti 3 O 12 (BTO) was controlled in situ by high-energy electron beam bombardment. BTO V -300 exhibited a significant activation effect on PDS. The degradation rate constant ( k obs ) for the removal of ciprofloxacin (CIP) was measured to be 0.2080 min −1 under visible light irradiation, which was 3.71 times greater than that of the original BTO. Density functional theory calculations uncovered the principal role of oxygen vacancies as active sites for PDS activation. Introducing OVs significantly boosted the adsorption energy of PDS on BTO and lengthened the O O bond of PDS. This study represents the potential mechanism behind the activation of PDS by BTO V and provides valuable insights for enhancing the photoactivation efficiency of PDS.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Zelai Li,Maohong Fan,Ge Gao,Wufeng Jiang,Xiaoshan Li,Cong Luo,Liqi Zhang,Fan Wu
Electrochemically mediated amine regeneration (EMAR) for CO 2 capture is a promising substitute for traditional organic amine–based CO 2 capture by replacing the thermal process with electricity. To avoid problems such as oxidative degradation, toxicity, volatilization, and precipitation of organic amine absorbent, potassium β–alanine was suggested as an absorbent using EMAR process for the first time in this study. The CO 2 absorption performance under different copper loading and chemical reactions were studied, and cyclic voltammetry, electrochemical impedance spectroscopy, chronocoulometry and the Taffel extrapolation method were used to study the electrochemical characterization. Compared to the benchmark monoethanolamine (MEA) system, a smaller potential difference between oxidation and reduction peak was acquired in the potassium β–alanine system, of which the energy consumption was only 44.1% of the MEA system at the current of 100 A/m 2 . The cathode Faraday efficiency in the potassium β–alanine system was 101.9% higher than that in the MEA system at the current density of 25 A/m 2 . Furthermore, the result of scanning electron microscope of the electrode surface after desorption showed that potassium β–alanine absorbent improved the inhomogeneity of the electrode surface and was in favor of uniform current distribution. Overall, potassium β–alanine can be used as a more environmentally friendly absorbent in the EMAR system and has great potential to further reduce the actual energy consumption and improve the Faraday efficiency and cycling performance.
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高影响因子
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