ANALYTICA CHIMICA ACTA
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2023
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IF 6.2
Tingting Liu,Yuhao Li,JingJing Gu,Lei Zhang,Feiyue Qian,BinRong Li,Xuedong Wang
Modulation of the nanozyme's catalytic activity is crucial for its real applications in detecting target analytes. Herein, we fabricated the nanocomposite (NSC/Co 6 Ni 3 S 8 ) of N, S co-doped carbon and Co 6 Ni 3 S 8 by a facile sol-gel approach. Compared to NSC/Ni 9 S 8 , NSC/Co 6 Ni 3 S 8 with bimetallic active sites displayed better enzyme-mimetic activity. This nanocomposite could catalyze O 2 to form ·O 2 − and oxidize colorless 3, 3′, 5, 5′-tetramethylbenzidine (TMB) into blue oxTMB. The other two free radicals (h + and ·OH) played minor roles during the catalytic reaction. Hg 2+ could integrate with S 2− to form HgS and the surface charges of O 2 were transferred to Hg 2+ to promote O 2 adsorption. DFT theoretical calculations highlight that the main reasons for the enhancing effect of Hg 2+ on color development results from electron transfer and increased adsorption energy of O 2 molecules onto the surface of NSC/Co 6 Ni 3 S 8 . By employing the oxidase-like activity of NSC/Co 6 Ni 3 S 8 and Hg 2+ -triggered promoting effect, a colorimetric sensing platform was established for Hg 2+ assay with a linear range of 10–200 μg/L and detection limit of 3 μg/L. Through integration with a smartphone-based APP “Thing Identify” software, a visual colorimetric assay for Hg 2+ was constructed with a detection limit of 5 μg/L. Compared to the data detected by the mercury vapor meter, the relative recoveries of 92.4–108.1% evidenced the higher accuracy of this smartphone-based visual detection. Overall, the NSC/Co 6 Ni 3 S 8 -based colorimetric assay is convenient, rapid, and visual, and can be applied for routine monitoring of Hg 2+ in real-world waters under outdoor conditions.
研究领域:
分析化学
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环境科学
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材料科学
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DOI
PubMed
高影响因子
NPG Asia Materials
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2022
·Vol. 14
·期 1
·1-11
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IF 10.761
Chen Zheng,Wang Lin,Chen Chichi,Sun Jie,Luo Junchao,Cui Wenguo,Zhu Can,Zhou Xiaozhong,Liu Xingzhi,Yang Huilin,Shi Qin
Cell-derived extracellular matrix (ECM) has been applied in spinal cord injury (SCI) regeneration because of its various biological functions. However, insufficient mechanical properties limit its wide application. Herein, we developed GelMA/ECM hydrogel fibrous scaffolds (GelMA/ECM scaffolds) that can recruit and enhance the differentiation of neural stem cells (NSCs) by electrospinning and decellularization techniques. Moreover, the GelMA/ECM scaffolds had good mechanical properties and reinforced cell adhesion and proliferation. Compared to GelMA hydrogel fibrous scaffolds (GelMA scaffolds), GelMA/ECM scaffolds promoted more NSCs toward neurons by markedly enhancing the expression of MAP-2 and Tuj-1 and decreasing GFAP expression. In addition, the GelMA/ECM scaffolds significantly reduced the proportion of M1-phenotype macrophages, which is favorable for SCI repair. In vivo, the GelMA/ECM scaffolds recruited NSCs at the injured site, promoted neuron regeneration, and reduced the formation of glial scars and the inflammatory response, which further led to a significant improvement in the functional recovery of SCI. Therefore, this scaffold shows potential in regenerative medicine, mainly in SCI.
研究领域:
再生医学
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生物医学工程
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神经科学
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组织工程
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DOI
高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
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2022
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IF 2.06
Jingguang Liu,Shao Luo,Hao Yang,Yanzhi Tao,Guangzai Nong
Carbon materials have been extensively used in scientific research and industrial production. Thereby, a kind of nanospheres of carbon (NSC) was prepared from sucrose, focusing on its physical and chemical structures, getting results that: (1) the yield of NSC is in average of 30.68% of the mass of sucrose, corresponding to 61.97% of carbon conversion. (2) The diameter of NSC is in the range of 150–200 nm, containing 1351.41 m2/g of surface area, which is contributed by the pores in average of diagram of 3.32 nm. (3) The apparent molecule formula (AMF) of NSC can be expressed as C11H2O with unsaturated degree of 11, which is the sum of the numbers of double bonds and rings. (4) It contains the groups of C = C, C-C, C-O-C and C-H; especially, the ratio between the double carbon bonds and single carbon bonds is 1.0. Therefore, this research successfully prepares a kind of special carbon materials by bio-resource, and does benefit to the theory for chemical structure analysis of carbon materials.
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Xiangfei He,Chao Peng,Lijuan Yue,Xiuli Han,Han Chen,Chunli Guo,Lichun Xu,Jianli Shao,Meiqing Guo
Due to its high reversible capacity, Fe 7 S 8 has emerged as a promising anode material for sodium-ion batteries (SIBs). However, its application is limited by slow reaction kinetics and significant volume expansion during the charging and discharging process, resulting in poor rate capacity and reduced cycling stability. To address these issues, a novel high-temperature gas-expansion method is proposed to uniformly incorporate Fe 7 S 8 nanoparticles into N and S co-doped porous carbon (Fe 7 S 8 @NSC). It effectively reduces the volume expansion of Fe 7 S 8 and improves its electron/ion conductivity. As a result, when used as an anode material in SIBs, Fe 7 S 8 @NSC demonstrates excellent rate performance, delivering a capacity of 500.0 mAh/g at a current density of 5 A/g. Additionally, it exhibits remarkable stability, maintaining 99.83 % of its capacity after 600 cycles at the same high current density.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Xiaoli Peng,Pengfei Wan,Long Yuan,Shilan Li,Shengdong Jing,Fuyu Xiao,Lingxing Zeng,Yaozhu Tian,Zhu Luo,Haosen Fan
The slow redox kinetics and shuttle effect of polysulfides are primary challenges that hinder the further application of lithium-sulfur batteries (LSBs) due to the poor conductivity of sulfur and low sulfur utilization. Separator modification through synergistic capture-catalysis-conversion of polysulfides proves to be an effective approach to address these challenges. In this paper, we successfully design and prepare double shell core-shell Co@Co 9 S 8 @NSC nanocrystals encapsulated in sulfur- and nitrogen-co-doped carbon nanotubes (Co@Co 9 S 8 @NSC) as a separator modifier for LSBs. The modified layer (Co@Co 9 S 8 @NSC//PP) exhibits excellent adsorption-catalytic properties, effectively immobilizing soluble lithium polysulfides (LiPSs) and promoting their electrochemical conversion, thereby enhancing lithium ion (Li + ) transport and facilitating a homogeneous lithium deposition process. When we utilize the Co@Co 9 S 8 core-shell structure to coat the polypropylene (PP) separator, the results demonstrate that the modified separator achieves a high reversible capacity of 591 mAh g −1 after 500 cycles at 1 C and reaches a reversible capacity of 442 mAh g −1 after 1000 cycles at 2 C, accompanied by a low capacity decay rate of only 0.05 % per cycle. The Li/Li symmetric batteries, which have Co@Co 9 S 8 @NSC-coated separators, exhibit long lifetimes exceeding 800 h at current densities of 2 mA cm −2 and 2 mAh cm −2 , along with a low voltage hysteresis of approximately 55 mV. This provides enhanced lithium stripping/plating stability compared to Li/Li symmetric batteries with pure PP separators. This study presents a novel approach to interlayer construction to achieve high sulfur utilization in long-life LSBs by accelerating the redox kinetics of LiPS and mitigating the shuttle effect.
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
高影响因子
Biomaterials Advances
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2024
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IF 5.5
Zhichao Wang,Chuanzhen Huang,Zhenyu Shi,Hanlian Liu,Xu Han,Zhuang Chen,Shuying Li,Zhen Wang,Jun Huang
Ischemic stroke , a cerebrovascular disease caused by arterial occlusion in the brain, can lead to brain impairment and even death. Stem cell therapies have shown positive advantages to treat ischemic stroke because of their extended time window, but the cell viability is poor when transplanted into the brain directly. Therefore, a new hydrogel GelMA-T was developed by introducing taurine on GelMA to transplant neural stem cells . The GelMA-T displayed the desired photocuring ability, micropore structure, and cytocompatibility. Its compressive modulus was more similar to neural tissue compared to that of GelMA. The GelMA-T could protect SH-SY5Y cells from injury induced by OGD/R. Furthermore, the NE-4C cells showed better proliferation performance in GelMA-T than that in GelMA during both 2D and 3D cultures. All results demonstrate that GelMA-T possesses a neuroprotective effect for ischemia/reperfusion injury against ischemic stroke and plays a positive role in promoting NSC proliferation . The novel hydrogel is anticipated to function as cell vehicles for the transplantation of neural stem cells into the stroke cavity, aiming to treat ischemic stroke.
研究领域:
神经科学
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生物医学工程
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干细胞疗法
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DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
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2023
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IF 13.1
Renliang Zhao,Yifan Shen,Xiangtian Deng,Yunfeng Tang,Zilu Ge,Dong Wang,Zhencheng Xiong,Qian Fang,Zhang Zhen,Xiaolin Li,Xiaotian Du,Wei Lin,Shichang Zhao,Guanglin Wang
The clinical indications reveal that traumatic brain injury (TBI) accelerates the process of limb bone regeneration. However, the mechanisms underlying this phenomenon remain ambiguous. In this inquiry, the activation of endogenous neural stem cells in the hippocampus post TBI led to the secretion of extracellular vesicles (NSC-EV) that targeted bone marrow mesenchymal stem cells, ultimately promoting bone healing. The enrichment of miR-9-5p in NSC-EV facilitated osteogenesis through the activation of the MAP3K3 pathway. We also present a novel hydrogel formulation for clinical application of NSC-EVs by means of ROS-responsive EV delivery. The hydrogel was cross-linked with EVs to create a water-based gel encapsulation, which was applied to a 3D-printed β-TCP scaffold for controlled long-term release that corresponded to those of physiological bone tissue. Our investigation represents the inaugural usage of EVs derived from neural stem cells in bone tissue engineering. These EVs were found to encourage information exchange between the central nervous system and bone tissue regeneration. Our composite scaffold demonstrated impressive bone regeneration qualities in rats with cranial defects, highlighting its potential for pioneering approaches in bone tissue engineering and innovative medical technologies for clinical applications.
研究领域:
再生医学
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干细胞生物学
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组织工程
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神经科学
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骨生物学
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生物医学工程
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Wei Shen,Jian Cui,Chuntao Chen,Lei Zhang,Dongping Sun
Metal-organic framework (MOF) derived transition metal-based electrocatalysts have received great attention as substitutes for noble metal-based hydrogen evolution catalysts. However, the low conductivity and easy detachments from electrodes of raw MOF have seriously hindered their applications in hydrogen evolution reaction. Herein, we report the facile preparation of Co-NSC@CBC84, a porous carbon-based and self-supported catalyst containing Co 9 S 8 active species, by pyrolysis and sulfidation of in-situ grown ZIF-67 on polydopamine-modified biomass bacterial cellulose (PDA/BC). As a binder-free and self-supported electrocatalyst, Co-NSC@CBC84 exhibits superior electrocatalytic properties to other reported cobalt-based sulfide catalytic materials and has good stability in 0.5 M H 2 SO 4 electrolyte. At the current density of 10 mA cm −2 , only an overpotential of 138 mV was required, corresponding to a Tafel slope of 123 mV dec −1 , owing to the strong synergy effect between Co-NSC nanoparticles and CBC substrate. This work therefore provides a feasible approach to prepare self-supported transition metal sulfides as HER catalysts, which is helpful for the development of noble metal-free catalysts and biomass carbon materials.
研究领域:
材料科学
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电化学
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催化
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纳米技术
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DOI
PubMed
高影响因子
Journal of Energy Chemistry
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2023
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IF 13.1
Katam Srinivas,Zhuo Chen,Anran Chen,Fei Ma,Ming-qiang Zhu,Yuanfu Chen
The development of efficient single-atom catalysts (SACs) for the oxygen reduction reaction (ORR) remains a formidable challenge, primarily due to the symmetric charge distribution of metal single-atom sites (M-N 4 ). To address such issue, herein, Fe-N x sites coupled synergistic catalysts fabrication strategy is presented to break the uniform electronic distribution, thus enhancing the intrinsic catalytic activity. Precisely, atomically dispersed Fe-N x sites supported on N/S-doped mesoporous carbon (NSC) coupled with FeS@C core-shell nanoparticles (FAS-NSC@950) is synthesized by a facile hydrothermal reaction and subsequent pyrolysis. Due to the presence of an in situ-grown conductive graphitic layer (shell), the FeS nanoparticles (core) effectively adjust the electronic structure of single-atom Fe sites and facilitate the ORR kinetics via short/long-range coupling interactions. Consequently, FAS-NSC@950 displays a more positive half-wave potential ( E 1/2 ) of 0.871 V with a significantly boosted ORR kinetics (Tafel slope = 52.2 mV dec −1 ), outpacing the commercial Pt/C ( E 1/2 = 0.84 V and Tafel slope = 54.6 mV dec −1 ). As a bifunctional electrocatalyst, it displays a smaller bifunctional activity parameter (Δ E ) of 0.673 V, surpassing the Pt/C-RuO 2 combination (Δ E = 0.724 V). Besides, the FAS-NSC@950-based zinc-air battery (ZAB) displays superior power density, specific capacity, and long-term cycling performance to the Pt/C-Ir/C-based ZAB. This work significantly contributes to the field by offering a promising strategy to enhance the catalytic activity of SACs for ORR, with potential implications for energy conversion and storage technologies.
研究领域:
电化学
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材料科学
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能量转换与存储
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DOI
高影响因子
危险品化学品经营许可证（带存储）