CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Zhongwei Li,Guochang Song,Xingyu Yang,Qiang Song
Activated carbon can be used to control NO x emissions in low-temperature flue gas, while improving its performance is challenging. NO adsorption on activated carbon was found significantly promoted with the presence of O 2 . Based on the analysis of NO adsorption characteristics under different atmospheres and corresponding desorption characteristics, NO oxidation, NO 2 migration and further conversion on activated carbon are proposed to cause the significant increase in NO adsorption capacity. Quantum chemical calculations conducted on the adsorption and reaction pathways of NO, O 2 , and NO 2 on different carbonaceous models clarified that the pathway of O 2 -promoted NO adsorption on activated carbon can be divided into two stages. In the first stage, O 2 adsorbs on active carbon atoms near the hydroxyl functional group and undergoes an oxidation reaction with gaseous NO to generate NO 2 . In the second stage, the desorbed NO 2 is re-absorbed on the saturated carbon atoms; the N-down adsorption configuration of NO 2 will not convert, while the O-down adsorption configuration of NO 2 will oxidize the active site to form C-O and release NO; the C-O further reacts with the gaseous NO 2 to form NO 3 - which stably remains. There are two types of active sites involved in the pathway. The active carbon atoms near the hydroxyl functional groups mainly play a catalytic role in the oxidation of NO, while the saturated carbon atoms mainly store nitrogen-containing components. The results can help improve the performance of activated carbon in adsorbing NO in low-temperature flue gas.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Yuxia Liu,Wensi Xu,Wenfeng Zhuge,Qing Huang,Gang Xiang,Jinyun Peng
Metal phthalocyanine-based porous organic polymers have gained increasing attention in numerous areas, but their application potential has yet to be comprehensively explored. In this study, a planar polymer (AlPc-CC POP) with excellent electrochemical capabilities was prepared using a straightforward substitution method. The electrocatalytic activity of AlPc-CC POP towards nifedipine (NIF) was investigated using electrochemical analysis. Under optimal conditions, the electrochemical sensor response to NIF was linearly positively correlated at concentrations ranging from 0.04 to 50 μM with a detection threshold of 0.0273 μM. Moreover, the sensor performed well in terms of reproducibility, stability, and selectivity. Notably, the constructed sensing platform enabled the determination of NIF levels in pharmaceuticals and human sera. This work provides a generalized platform for the detection of antihypertensive NIF and validates the potential of phthalocyanine-based porous organic polymer for sensing.
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JOURNAL OF CATALYSIS
·
2017
·
IF 6.844
Jun Tang,Qi Zhang,Kecheng Hu,Peng Zhang,Jianli Wang
We report herein the design and preparation of novel magneto-polymeric nanohybrids that can be used as efficient and recyclable Pickering interfacial catalyst (PIC) in selective oxidation of alcohols. The nanohybrids Fe 3 O 4 @SiO 2 @PTMA, bearing catalytic TEMPO functionalities, were synthesized through distillation-precipitation polymerization (DPP) of the precursor monomer 2,2,6,6-tetramethyl-4-piperidyl methacrylate (TMPM) and subsequent oxidation reaction. TEM, FT-IR, DLS, EA confirmed and quantified the TEMPO loading of nanohydrids (1.0–2.4 mmol · g −1 ). It was found that the TEMPO loading, particle size, as well as surface hydrophilicity could be finely tuned via simply adjusting the TMPM monomer fraction during polymerization. The performance of the resultant nanohybrids as PIC was then evaluated in a typical Anelli system, which showed superior catalytic activity for selective oxidation of alcohols. Moreover, the PIC can be easily recycled by applying magnetic field, and reused for the following cycles of oxidation without any loss on either conversion or selectivity.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yang Zou,Lan Li,Yuan Li,Si Chen,Xianhua Xie,Xin Jin,Xiaodan Wang,Chuanrui Ma,Guanwei Fan,Wei Wang
Both myocardial infarction (MI) and the follow-up reperfusion will lead to an inevitable injury to myocardial tissues, such as cardiac dysfunctions, fibrosis, and reduction of intercellular cell-to-cell interactions. Recently, exosomes (Exo) derived from stem cells have demonstrated a robust capability to promote angiogenesis and tissue repair. However, the short half-life of Exo and rapid clearance lead to insufficient therapeutic doses in the lesion area. Herein, an injectable conductive hydrogel is constructed to bind Exo derived from human umbilical cord mesenchymal stem cells to treat myocardial injuries after myocardial infarction–ischemia/reperfusion (MI-I/R). To this end, a hyperbranched epoxy macromer (EHBPE) grafted by an aniline tetramer (AT) was synthesized to cross-link thiolated hyaluronic acid (HA-SH) and thiolated Exo anchoring a CP05 peptide via an epoxy/thiol “click” reaction. The resulting Gel@Exo composite system possesses multiple features, such as controllable gelation kinetics, shear-thinning injectability, conductivity matching the native myocardium, soft and dynamic stability adapting to heartbeats, and excellent cytocompatibility. After being injected into injured hearts of rats, the hydrogel effectively prolongs the retention of Exo in the ischemic myocardium. The cardiac functions have been considerably improved by Gel@Exo administration, as indicated by the enhancing ejection fraction and fractional shortening, and reducing fibrosis area. Immunofluorescence staining and reverse transcription-polymerase chain reaction (RT-PCR) results demonstrate that the expression of cardiac-related proteins (Cx43, Ki67, CD31, and α-SMA) and genes (VEGF-A, VEGF-B, vWF, TGF-β1, MMP-9, and Serca2a) are remarkably upregulated. The conductive Gel@Exo system can significantly improve cell-to-cell interactions, promote cell proliferation and angiogenesis, and result in a prominent therapeutic effect on MI-I/R, providing a promising therapeutic method for injured myocardial tissues.
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PubMed
高影响因子
TALANTA
·
2022
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IF 6.556
Yayun Gu,Lizhong Peng,Weihua Ding,Yang Wang,Xuhui Zeng
Heparanase (HPA) is a multifaceted endo -β-glucuronidase, and its dysregulation facilitates cancer metastasis. Developing techniques for fast and sensitively monitoring HPA enzymatic activity is crucial for searching for molecular therapies targeting HPA. Herein, we developed a novel fluorescence resonance energy transfer (FRET)-based nanoprobe AuNCs-LMWH-AuNRs, with AuNCs@GSH-cys and AuNRs/end-NH 2 /side-SiO 2 attached to the non-reducing terminus and reducing terminus of low molecular weight heparin (LMWH), respectively. AuNCs@GSH-cys exhibited an absolute quantum yield of 1.1%. The absorption spectra of AuNRs/end-NH 2 /side-SiO 2 (825 nm for maximum longitudinal absorption) and the emission spectra of AuNCs@GSH-cys (824 nm for maximum emission) were precisely overlapping, further enhancing the efficiency of FRET. In the presence of HPA, the LMWH nanoprobe exhibited an ultrasensitive response with excitation/emission wavelength (lambda (ex) = 560 nm, lambda (em) = 824 nm). The probe presented a wide linear dynamic detection range (LDR) of 0.125 ng/μL - 0.01 μg/μL in vitro with a limit of detection (LODs) of 82.15 pM (0.43 pg/μL). The excellent selectivity and good fluorescence turn-on efficiency of the probe made it possible for one-step detection of cellular heparanase activity. High throughput screening of HPA inhibitors also can be accomplished using the highly efficient LMWH nanoprobe.
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高影响因子
Foods
·
2023
·Vol. 12
·期 10
·2042
·
IF 5.2
Lanlan Hu,Yangyang Jia,Xiaoxiao Zhang,Yajie Zhang,Meizhu Dang,Chunmei Li
The present study aimed to evaluate the capability of persimmon pectin (PP) as a stabilizer for acid milk drinks (AMDs) compared with commercial high-methoxyl pectin (HMP) and sugar beet pectin (SBP). The effectiveness of pectin stabilizers was assessed by analyzing particle size, micromorphology, zeta potential, sedimentation fraction, storage, and physical stability. Results of CLSM images and particle size measurements showed that PP-stabilized AMDs had smaller droplet sizes and more uniform distributions, indicating better stabilization potential compared with the HMP- and SBP-stabilized AMDs. Zeta potential measurements revealed that the addition of PP significantly increased the electrostatic repulsion between particles and prevented aggregation. Moreover, based on the results of Turbiscan and storage stability determination, PP exhibited better physical and storage stability compared with HMP and SBP. The combination of steric repulsion and electrostatic repulsion mechanisms exerted a stabilizing effect on the AMDs prepared from PP. Overall, these findings suggest that PP has promising potential as an AMD stabilizer in the food and beverage industry.Keywords:persimmon pectin;stability;acidified milk drinks;natural ingredients
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Chao Xing,Laiben Gao,Xiaoqiu Dou,Kaikai Yang,Changli Zhao,Chuanliang Feng
Hypoxic injury poses a severe threat to cell survival. Activation of pro-survival autophagy via autophagy-inducing nanomaterials (AINMs) has emerged as one of the most promising therapeutic strategies. However, internalized AINMs easily bind with intracellular lysosomes, resulting in disruptive effects on autophagic flux and limited pro-survival effects. Herein, inspired by the naturally existing chiral structures in actin membrane protein, two nanofibers based on achiral pyridine-substituted coumarin derivatives (PyC) with only difference in supramolecular chirality are constructed by the method of chirality memory to activate autophagy extracellularly. The high degree of conformational chirality matching between right-handed PyC-r nanofibers and actin ensures an enhanced stereoselective interaction between the pyridine groups on PyC and the hydroxyl groups on serine-rich Girdin protein (an actin-binding protein involved in cell survival). This stereoselective interaction can activate the autophagy-related Akt/mTOR pathway via mechanical signal transmission and phosphorylation of Akt, which avoids the disruption of autophagic flux and significantly mitigates cellular hypoxic injury. In a rat myocardial ischemia model, scar formation and functional deterioration are particularly alleviated by injection of PyC-r nanofibers into murine infarcted myocardium. The findings pioneeringly establish a direct link between chiral biomedical materials and cellular autophagy, offering novel insights for cellular hypoxic protection.
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JOURNAL OF POWER SOURCES
·
2015
·
IF 6.217
Pengfei Han,Yuewu Zhu,Jin Liu
A cross-linked polymer electrolyte membrane (SPE) was fabricated by a solvent-free hot-pressing method for all-solid-state lithium ion battery . The ionic conductivity of the electrolyte is 1.34 × 10 −3 S cm −1 and the decomposition potential is 4.87 V at the ethylene oxide (EO):LiN(SO 2 CF 3 ) 2 (LiTFSI) molar ratio of 20:1 and 120 °C. TG-DSC results show that the SPE is thermally stable up to 230 °C in argon atmosphere . The assembled LiFePO 4 /SPE/Li all-solid-state battery can stably work in the temperature range of 80–140 °C. At 120 °C, the initial discharge capacity of the battery is 156.7 mAh g −1 at 1C which is close to the theoretical capacity of the cathode material , showing that the solvent-free filming method is low-cost and environment-friendly for solid polymer electrolyte and all-solid-state lithium ion battery.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Jingyi Lin,Runlu Liu,Xin Li,Yixin Zhao,Lingti Kong,Yao Li,Shenmin Zhu,Lianzhou Wang
Photoelectrochemical water splitting with bismuth vanadate (BiVO 4 ) photoanodes is a promising strategy for solar-driven hydrogen production . However, the unfavorable interfacial charge behavior causes severe charge recombination and photocorrosion issue of BiVO 4 . Herein, cobalt-doped carbon nanodots (CoCDs) are employed for efficient charge extraction due to Co impurity level, which form band alignment with BiVO 4 , as well as accelerate surface reaction. As a result, the obtained CoCDs/BVO photoanode demonstrates an outstanding photocurrent density of 5.26 mA/cm 2 at 1.23 V vs. reversible hydrogen electrode under AM 1.5 G illumination, superior to most BiVO 4 photoanodes with cocatalysts. Carbon nanodots turn out to be an excellent matrix to activate and stabilize Co atoms and tightly anchor onto BiVO 4 , which makes them good interfacial modifier. This work paves an avenue for the optimization of semiconductor/liquid interface and the application of carbon nanomaterials in photoelectrodes.
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ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Shuangshuang Hao,Xinren Zhang,Yongwei Pei,Hao Xiong,Qian Ye,Fei Xu,Feng Zhou
Aqueous zinc-ion-based devices exhibit an attractive prospect in large-scale energy storage due to their safe, environmentally friendly, and low-cost characteristics. Nevertheless, the Zn metal anode suffers critically from severe parasitic reactions and Zn dendrites, mainly as a result of the lack of stable interphase layers. Herein, we propose the in situ grafting of an ultrathin molecular brush (≈10 nm thickness) as an artificial solid electrolyte interphase (SEI) for a highly reversible dendrite-free Zn anode by a surface-grafting strategy. The dense sulfonate functional groups of the poly[[2-(methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)] (PSBMA) SEI layer simultaneously inhibit the penetration of SO42–, avoiding the occurrence of side reactions. Meanwhile, the PSBMA layer allows a uniform Zn-ion concentration field and fast Zn2+ migration kinetics, leading to a dendrite-free Zn anode. Therefore, the half cell using the PSBMA-modified Zn anode achieves a high average Coulombic efficiency of 99.80% over 1000 cycles at 5 mA cm–2. In symmetrical cells, the PSBMA-modified Zn anode exhibits an ultralong lifespan of over 3300 h, far exceeding that of the bare Zn anode (120 h). As proof-of-concept demonstration, the full cells with MnO2 and activated carbon cathodes deliver a superior capacity retention ratio. Our findings show that the construction of in situ SEI layers has promising applications in high-performance aqueous battery technology.
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ACS Sensors
·
2023
·
IF 8.9
Boyu Wang,Tao Peng,Zhiyuan Jiang,Jinxin Xu,Jifeng Qu,Xinhua Dai
Lateral flow immunoassay (LFIA) is a simple point-of-care method for detecting various analytes. However, the lack of test result precision and poor quantification are the main bottlenecks of LFIA. Although magnetic nanoparticles (MNPs) have gained prominence as potent labels in LIFA, the quantitative detection method for trace biomarkers remains to be improved. Here, we propose a promising real-time biosensing platform based on a highly sensitive atomic magnetometer to fulfill the quantitative detection of MNP-based lateral flow immunochromatographic assays. The strategy entails obtaining the residual flux density component spectrum by continuously and linearly scanning the trace MNP label and then resolving the magnetization and quantity from the spectrum. Moreover, we exploit the theoretical model of the magnetic dipole to verify the method’s reliability. Regarding carcinoembryonic antigen detection, the atomic magnetometer exhibits a low detection limit of ∼0.01 ng mL–1 with a 100-fold enhancement factor compared to optical detection methods and a more straightforward mechanism than other magnetic detection approaches. Together, these results provide valuable insight for the potential application of atomic magnetometer quantum measurement techniques in intelligent diagnosis and treatment.
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高影响因子
ADVANCED ENGINEERING MATERIALS
·
2023
·Vol. 25
·期 24
·2301059
·
IF 3.6
Nan Jia,Lei Wang,Qiang Weng,Yuan Jia,Pei Chen
The pursuit of efficient and cost-effective electrocatalysts for hydrogen production via water splitting remains a significant challenge. Herein, a unique layered amorphous metal–organic frameworks, designated as Co-HAB, is introduced. When utilized in oxygen evolution reaction (OER) and hydrogen evolution reaction, this Co-HAB-based electrocatalyst demonstrates superior activity and stability. Employing a mixture of Co-HAB and carbon black (Co-HAB-C) as both cathode and anode electrocatalysts in a 1 m potassium hydroxide electrolyte, the cell exhibits a voltage of merely 1.552 V and attains a current density of 10 mA cm −2 , which is suitable for hydrogen generation. Furthermore, density functional theory computations indicate that the modest OH* adsorption capability at the catalytic site plays a pivotal role in enhancing the OER catalytic efficiency, as confirmed by alcohol molecular probe tests.
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