Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Zhengtao Jia,Yuxiang Zhu,Yan Wang,Shaohui Wang,Meng Jiang,Qiufan Sun,Xiang Zhong,Jianfeng Yao
In this work, a series of metal-organic coordination polymers composed of transition metals and hexaazatrinaphthalene tricarboxylic acid ligands (M-HATNTA, M = Fe, Co, Cu) were prepared via a facile solvothermal method for efficient electrocatalytic nitrogen reduction to ammonia. Fe-HATNTA forms nanotubular structures with rough surfaces, whereas other polymers produce nanorods with smooth surfaces. Fe-HATNTA outperforms its counterparts, presenting a nitrogen fixation rate of 16.4 μg h −1 mg −1 with Faradaic efficiency of 12.3 % at −0.5 V vs RHE. The coordination of Fe can enhance conductivity by improving the accessibility of active centers through surrounding organic ligands and fostering strong electronic interactions between the organic ligands and metal nodes. Moreover, the one-dimensional nanotubular architecture enhances electron transfer along the axial direction. In-situ spectroscopic studies reveal that iron coordination sites, acting as electron acceptors, can promote the formation of the −NH intermediate and the optimal potential of −0.5 V vs RHE encourages the participation of free electrons in the electrocatalytic reaction, as it corresponds to the conduction potential of Fe-HATNTA. This study emphasizes the role of metal centers and group modifications in optimizing metal-organic coordination polymers for electrocatalytic ammonia synthesis.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Weijun Zhou,Ping Wang,Zhipeng Chen,Xuefei Wang,Huogen Yu
Traditionally, nano-titanium dioxide (TiO 2 ) is widely regarded as an effective hydrophilic material due to its certain amount of hydroxyl groups. However, the limited hydroxyl groups and the poor network structure of the TiO 2 surface result in suboptimal hydrophilicity and stability. In this study, a stable and long-lasting superhydrophilic Fe-coordinated tannic acid (TA) network is constructed by introducing TA and Fe 3+ to form a hydroxyl-rich 3D network on the surface of TiO 2 . The hydrophilicity test results demonstrated that the Fe-TA/TiO 2 film exhibited exceptional superhydrophilic property with a water contact angle of 1.3°, significantly lower than that of the TA/TiO 2 film (18.2°) and the TiO 2 film (65°). Importantly, it maintained long-lasting superhydrophilicity (water contact angle < 10°) for more than 16 days. The superhydrophilicity and long-term stability of the Fe-TA/TiO 2 film can be attributed to the abundance of hydroxyl groups and the stable Fe-coordinated TA 3D networks. This study presents a promising methodology for optimizing the TiO 2 surface through metal-organic coordination for enhanced long-term superhydrophilicity.
研究领域:
材料科学
·
表面化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yingying Guo,Huiyong Wang,Qian Zhang,Shuaiqi Gao,Zhiyong Li,Yang Zhao,Zhimin Liu,Suojiang Zhang,Jianji Wang
Covalent organic frameworks (COFs) have great potential in solar hydrogen production to alleviate environmental pollution and global energy crisis. However, to achieve high H 2 yield is still a challenge. Herein, we designed and synthesized two Fe 3+ -coordinated imine type COFs (Fe-COFs) for photocatalytic H 2 production from water splitting. It was surprising to find that with the progress of H 2 evolution under visible light, the bulk powders of Fe-COFs (180–250 nm) were gradually stripped into covalent organic nanosheets (Fe-CONs, 0.3–1.9 nm), which in turn efficiently catalyzed H 2 production. As such, a self-driven mechanism was established in the catalytic system, and H 2 evolution rate increased with the increase of cyclic runs until the thickness of the nanosheet no longer changes in the regeneration and reuse process of the Fe-CON photocatalysts. The optimal Fe-CON catalyst exhibited a record high H 2 evolution rate of 67.94 mmol g −1 h −1 among the currently reported COFs loaded with other non-noble metals, due to the more exposed active sites, smaller charge-transfer resistance, and stronger separation ability of the photogenerated electrons and holes of Fe-CONs. This work provides the first example for the integration of self-driven photochemical exfoliation of 2D materials and their highly efficient photocatalytic hydrogen evolution.
研究领域:
材料科学
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能源科学
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环境科学
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产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2023
·
IF 12.6
Lin Jiang,Qi Ao,Xinglai Tong,Xiaoxiao Lv,Ying Song,Jun Tang
A fast and accurate method for ultrasensitive monitoring of substrate is significant for cascade molecular detection. Here, we synthesize a glucose oxidase (GOx) microgel with iron coordination (Fe/GOx microgel). The microgel is cross-linked by chitosan and iron ion coordination which construct a tubular structure. Powder X-ray diffraction and Brunauer-Emmett-Teller results confirm the tubular crystal structure with a high specific surface area is formed in the microgel. The tubular structure offers a stable channel for intermediate transport which ensures the stabilization for the intermediate transport, and high specific surface area enhances the interaction between substrates and catalysts. As a result, the sensitivity of the Fe/GOx microgel is 175.5 μA mM −1 cm −2 and the lowest detection limit is 4.42 μM. In addition, the nanoscale Fe/GOx microgel also has the characteristics of reusability and maintains its activity after five times of catalysis. The generation of free radicals during the catalytic process can be detected by light detection and electrochemical signal detection within different detection limits. Therefore, Fe/GOx microgel provides a new platform and catalyst for the precise detection of cascade catalysis.
研究领域:
生物化学
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分析化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Xiaomin Cao,Miao Qin,Pan Li,Binbin Zhou,Xianghu Tang,Meihong Ge,Liangbao Yang,Jinhuai Liu
Catecholamine (CA) is neurotransmitters of the biological amines class which play an important role in organism. However, it is quite difficult to realize sensitive and selective detection of CA in complex system. Here, we employ surface-enhanced resonance Raman spectroscopy (SERRS) strategy, iron-nitrilotriacetic acid functionalized PVP-Au NPs (Au-Fe(NTA)) as Raman label for rapid and sensitive detection of CA containing dopamine (DA), norepinephrine (NE) or epinephrine (EP) in complex serum. The Au NPs is sufficient to provide Raman enhancement and Fe-NTA label can rapidly trap CA molecules adjoining gold core to form NTA-Fe-CA resonant structure, which can amplify the signals of CA. More important, we successfully distinguish these three CA molecules in serum since surface-enhanced Raman spectroscopy (SERS) technique can provide fingerprint identification. Furthermore, the SERS signals of Au-O band from PVP stabilized Au NPs can be utilized as a stable internal calibration standard for quantitative detection of target. Additionally, we continue to investigate the binding constants between different CA molecules and functionalized substrate to evaluate the corresponding adsorption property. This SERRS strategy is not only capable to offer exciting opportunities to selectively trap the analyte, but also strongly amplify the Raman signals of CA as well as achieve quantitative measurement.
研究领域:
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2018
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IF 3.609
Ying Gong,Wenying Zhou,Zijun Wang,Li Xu,Yujia Kou,Huiwu Cai,Xiangrong Liu,Qingguo Chen,Zhi-Min Dang
In this work, graphene oxide (GO) nanosheets with surface modification by Tannic and Fe coordination complexes (TA-Fe) were incorporated into poly(vinylidene fluoride) (PVDF) to prepare high constant but low loss polymer nanocomposites , and the effect of TA-Fe interlayer on dielectric properties of the GO@TA-Fe/PVDF nanocomposites was investigated. The results indicate that the dosage, mixing ratio, and reaction time of TA-Fe complexes have obvious influences on the dielectric properties of the nanocomposites. Furthermore, the TA-Fe interlayer significantly influences the electrical properties of GO@TA-Fe nanoparticles and their PVDF composites, and the GO@TA-Fe/PVDF composites exhibit superior dielectric properties compared with raw GO/PVDF. Dielectric losses of the GO@TA-Fe/PVDF are significantly suppressed to a rather low level owing to the presence of TA-Fe layer, which serves as an interlayer between the GO sheets, thus preventing them from direct contacting with each other. Additionally, the dynamic dielectric relaxation of the GO/PVDF and GO@TA-Fe/PVDF nanocomposites was investigated in terms of temperature.
研究领域:
材料科学
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电气工程
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
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IF 1.5
Yuzhen Zhang,Jiangying Yu,Changwei Shao,Peichuan Sun,Chungang Min,Jianhua Wang,Xikun Yang
Effectively improving catalytic activity of nitrogen (N)-doped carbon catalysts in oxygen reduction reaction (ORR) is very important but still facing with challenges. Herein, we proposed a “solvent effect” strategy to prepare a high active N-doped carbon catalyst with trace iron (N-C-Fe-ethanol, 0.10 at.% Fe) via pyrolysis of polyaniline (PANI)-iron (Fe) coordination polymer washed with ethanol. Electrochemical results show that N-C-Fe-ethanol catalyst exhibits a remarkable 109 mV positive shift of half-wave potential compared with that of catalyst unwashed PANI-Fe coordination polymer, and its limiting current density (3.61 mA-cm -2 ) is closer to that of Pt/C catalyst in acid media. It was demonstrated that the surface structure of PANI-Fe coordination polymer could be tuned via removing some nitrogen-containing groups such as –N + = groups and other small molecules on its surface, which helped to generate a high ratio of graphitic N in the pyrolysis process. This work develops a new path for improving the ORR activity of N-doped carbon catalysts.
研究领域:
材料化学
·
电催化
·
能源材料
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纳米催化
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表面化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2019
·Vol. 7
·期 40
·6172-6180
·
IF 5.047
Liang Dong,Chao Wang,Wenyao Zhen,Xiaodan Jia,Shangjie An,Zhiai Xu,Wen Zhang,Xiue Jiang
As the semisynthetic derivative and active metabolite of the effective anti-malarial drug artemisinin, dihydroartemisinin (DHA) has been investigated as an emerging therapeutic agent for tumor treatment based on the cytotoxicity of free-radicals originating from interactions with ferrous ions. Meanwhile, simultaneously delivering DHA and iron ions to tumors for selectively killing cancer cells is still a great challenge in DHA tumor therapy. Herein, we develop a facile yet efficient strategy based on iron-coordinated hollow polydopamine nanospheres to load DHA (DHA@HPDA-Fe). The as-prepared nanoagent is biodegradable and exhibits controllable release of DHA and Fe ions in tumor microenvironments, resulting in ferrous ion-enhanced production of cytotoxic reactive oxygen species (ROS) by DHA and thus effectively killing the tumor cells. In vivo therapy experiments indicated that the anti-tumor efficacy of DHA@HPDA-Fe was about 3.05 times greater than that of free DHA, and the tumor inhibition ratio was 88.7% compared with the control group, accompanied by negligible side effects, indicating that the proposed nanomedicine platform is promising for anti-tumor applications.
研究领域:
药理学
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纳米医学
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肿瘤学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Aiping Zhan,Hou-Yong Yu
Human skin exhibits remarkable self-healing and responsiveness, attributed to dynamic disulfide (S S) bonds. However, traditional elastomer polymers often suffer from poor mechanical performance, low stability, and weak signal-capture capabilities due to metastability and insufficient interchain interactions. To overcome these limitations, a novel strategy combining inverse vulcanization and iron(III)-carboxylate coordination was proposed to construct a multifunctional, recyclable elastomer named PTCFe. In this system, thioctic acid (TA) undergoes inverse vulcanization with maleic acid-modified cellulose nanocrystals (MACNC), forming a robust dynamic network. Subsequently, ferric chloride (FeCl₃) induces multivalent Fe 3+ –carboxylate coordination, further reinforcing the polymer matrix. The presence of abundant hydrogen bonds and dynamic S S linkages synergistically enhance interchain interactions. As a result, PTCFe demonstrates high optical transparency (>90 %), exceptional stretchability (up to 1200 %), and strong adhesion (1368.56–1938.76 KPa) to diverse surfaces. It also exhibits outstanding self-healing efficiency (up to 89.6 %) and skin-friendly properties, maintaining stable signal detection during strenuous activities such as mountaineering, even under subzero conditions. Moreover, the elastomer is fully recyclable by thermal remelting and shows rapid biodegradability in soil. The PTCFe with above properties as a promising platform for next-generation wearable sensors and electronic skin (e-skin) technologies.
研究领域:
材料科学
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高分子化学
·
柔性电子学
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可穿戴传感器
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生物降解材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2024
·
IF 10
Xinwei Fu,Tao Zhang,Chuanlan Xia,Shan Du,Bo Wang,Zhensen Pan,Yunlong Yu,Peng Xue,Bin Wang,Yuejun Kang
Coated microneedles (CMNs) are a minimally invasive platform for immediate-release transdermal drug delivery. However, the practical applications of CMNs have been significantly hindered by the challenges associated with complex formulations, single function, and limited drug loading capacity. This study has developed a spiderweb-shaped iron-coordinated polymeric nanowire network (Fe-IDA NWs). The resulting Fe-IDA NWs are endowed with a certain viscosity due to the synergy of multiple supramolecular interactions. This allows them to replace traditional polymeric thickeners as microneedle coatings. The Fe-IDA NWs-coated microneedles (Fe-IDA MNs) display rapid disintegration in the skin model, which also enables the swift diffusion of Fe-IDA NWs and their payloads into the deeper skin layers. Additionally, Fe-IDA MNs exhibit desirable enzymatic activity and potential antibacterial ability. Thus, Fe-IDA MNs can enhance the therapeutic efficacy against wound infection through synergistic effects, and avoid the overly complicated formulation and the release of nontherapeutic molecules of conventional CMNs. As a proof-of-concept, Fe-IDA MNs loaded with chlorin e6 showed a synergistic chemodynamic-photodynamic antibacterial effect in a methicillin-resistant Staphylococcus aureus-infected wound model in mice. Collectively, this work has significant implications for the future of CMNs-based transdermal drug delivery systems and expands the application fields of metal coordination polymer (MCP) materials.
研究领域:
药学
·
材料科学
·
生物医学工程
·
药物递送系统
✓ 已验证
DOI
高影响因子
Biomaterials Science
·
2023
·
IF 6.6
Tong Li,Dianwei Wang,Zhaopei Guo,Lin Lin,Meng Meng,Cong Liu,Kai Hao,Xuan Pang,Huayu Tian,Xuesi Chen
The emergence of nanocarriers has greatly improved the therapeutic efficacy of chemotherapeutic drugs. As emerging nanocarriers, covalent organic frameworks (COFs) have been increasingly used in biomedicine in recent years. However, due to their inherent chemical stability, existing COF nanocarriers hardly undergo in vivo degradation, which brings potential safety hazards to further applications. In this work, we introduce the azo bond into COFs. When the nanocarrier enters the cell, ˙OH generated by the coordinated Fe response to the H2O2 in the cell will break the azo bond and cause the degradation of the framework structure, accelerating the release of internally loaded DOX to effectively realize tumor treatment. We verified the degradation ability of the materials by constructing model compounds, in vitro drug release, MTT assay and antitumor experiments. Compared with the control groups, the degradable COF accelerates the release of DOX and shows a stronger killing effect on 4T1 cells. Serum biochemical analysis and H&E sections of organs show good biocompatibility for both COFs and degradation products. This work provides a new idea for the design of biodegradable COFs in vivo, and greatly explores the potential application of COF materials in the biomedical field.
研究领域:
纳米技术
·
药学
·
生物医学工程
·
癌症研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Xiangrong Shi,Kuiyuan Zhang,Liwei Zhao,Bo Jiang,Yudong Huang
Self-healable siloxane elastomers have recently attracted much interest in research for applications in flexible electronic devices. However, it remains a challenge for self-healable siloxane elastomers to realize good mechanical and rapid high-efficiency self-healable properties at room temperature. Herein, a desirable siloxane polymer elastomer was designed by the synergy of multiple dynamic bonds. In this self-healable system, the disulfide bonds as sacrificial bonds and hydrogen bonds as weak bonds could endow elastomers with rapid self-healability and high stretchability. Whereas, the Fe-coordination bonds could tune the robustness of a siloxane elastomer. Due to the synergy of multiple dynamic bonds, the self-healable PDMS-SS-DOPA1-Fe2 elastomer achieved high stretchability of 1100%, tensile stress of 1.11 MPa, and high self-healable efficiency of 96% (within 3 h). Moreover, after healing for 3 min at room temperature, the damaged siloxane elastomers were able to obtain a breaking strain of 250% and tensile stress of 0.5 MPa. As a proof of concept, based on elastomer films integrated with liquid metal alloy EGaIn (eutectic gallium–indium), stretchable electrodes and strain sensors were subsequently developed, opening the avenue to potential applications in flexible electronics and microsystems.
研究领域:
材料科学
·
聚合物化学
·
柔性电子
✓ 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）