COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yuanjun Liu,Binbin Li,Yuyu Liu,Xiaofang Cheng,Xuanmei Liang,Junhao Zhang,Guoxing Zhu
Metal-organic frameworks represent an emerging class of effective pre-electrocatalysts with low cost and high activity for oxygen evolution, which is a critical process involved in water splitting and metal-air batteries . In this study, a new electrode with ferrocene-based coordination compounds supported by nickel foam was designed and prepared, in which the coordination compounds are assembled by cobalt chloride and 1, 1'-ferrocenedicarboxylic acid. The as-obtained pre-catalytic electrode shows remarkable electrocatalytic activity and stability towards oxygen evolution. In 1 M KOH, the electrode can provide a current density of 50 mA cm −2 at an overpotential of 268 mV with Tafel slope of 109 mV dec −1 . During the catalytic process, the metal-organic framework surface shows an obvious phase evolution behavior. The synergetic effect between Co and Fe sites, and the unique microstructure of the in situ derived active species are believed to be responsible for the excellent electrocatalytic performance. The catalytic electrode was also investigated as a cathode in a Zn-air battery, which presents an energy density of 572 mW h g Zn −1 , a peak power density of 60 mW cm −2 , and an excellent cyclability of over 50 h. This work presents a new type pre-catalytic electrode for oxygen evolution and would provide some hints for the development of advanced catalytic electrodes.
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
Analytical Methods
·
2016
·Vol. 8
·期 31
·6099-6106
·
IF 1.915
Lijun Qiao,Xiaohua Zhou,Yanhao Zhang,Ajuan Yu,Shusheng Zhang,Yangjie Wu
In this paper, a rapid and effective HPLC method, using a new 4-chloro-6-pyrimidinylferrocene-modified silica gel (NFcSi) as a solid-phase extraction (SPE) sorbent, was developed for the purification and determination of trace sulfonamides in foodstuffs. The main influencing factors of SPE including the amount of NFcSi sorbent, sample flow rate, and species and volume of the eluant were investigated and evaluated in a sample pretreatment step. The optimized purification effect was achieved at a sample flow rate of 2 mL min−1 with 100 mg of NFcSi and 5 mL of washing solution (water, 100%). The HPLC analysis was carried out on a Shim-Pack VP-ODS column (150 × 4.6 mm i.d., 5 μm) with a mobile phase of MeOH/0.1% acetic acid–water (30 : 70, v/v). With a detection wavelength of 270 nm, the good linearities of sulfadimidine (SM2), sulfamethoxazole (SMZ) and sulfadimethoxine (SDM) were obtained at concentrations ranging from 10 to 5000 ng mL−1 (R2 ≥ 0.9998). The RSD% values (n = 6) of retention times and peak areas in intra- and inter-day assays for three sulfonamides were all below 0.55%, 1.80%, 0.20% and 0.78%, which showed good precision. In addition, the overall recoveries of SM2, SMZ and SDM through the extraction and purification steps were in the range of 71.1–86.7%, 70.6–93.6% and 72.4–90.7%. Compared with commercial SPE sorbents, NFcSi featured excellent selectivity to retain polar and nonpolar interferents in sample matrices. The improved method was simple, rapid, accurate and promising for the determination of trace sulfonamides in foodstuffs with complex matrices.
研究领域:
分析化学
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食品安全
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DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2017
·Vol. 32
·期 1
·e3932
·
IF 2.319
Weidong Zhou,Li Wang,Haojie Yu,Xia Xia
A series of ferrocene-modified poly(glycidyl methacrylate) (PGMA-Fc) compounds were synthesized and applied as burning rate catalysts in simulative solid propellant to overcome migration problems. 1 H NMR and Fourier transform infrared spectroscopies and gel permeation chromatography were used to characterize the synthesized polymers. Their electrochemical behavior was evaluated using cyclic voltammetry. Their catalytic performance for the decomposition of ammonium perchlorate (AP) was investigated using thermogravimetric analysis. Anti-migration studies were conducted in migration tubes under 50°C. The results show that PGMA-Fc has a good catalytic effect on lowering the thermal decomposition temperature of AP. Anti-migration studies show that PGMA-Fc has better anti-migration performance than ferrocene and catocene.
研究领域:
材料科学
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催化化学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF ORGANOMETALLIC CHEMISTRY
·
2020
·
IF 2.304
Muhammad Usman,Haojie Yu,Li Wang,Jianguo Qian,Xuefeng Li,Amin Khan,Kaleem-ur-Rehman Naveed,Ahsan Nazir,Tarig Elshaarani,Shah Fahad
A series of copolymers of poly(2-(methacryloyloxy) ethyl ferrocene carboxylate- co -methacrylic acid)s (P(FHEMA- co -MAA)s) were synthesized as burning rate catalysts (BRCs). Their structures were verified using proton nuclear magnetic resonance ( 1 H NMR) and Fourier transforms infrared (FT-IR) spectroscopy. The electrochemical behavior of P(FHEMA- co -MAA)s was investigated by cyclic voltammetry (CV). The CV results indicated that P(FHEMA- co -MAA)s showed redox behavior. Anti-migration test proved that P(FHEMA -co- MAA)s possesses better anti-migration properties than ferrocene (Fc) and 2, 2-bis (ethylferrocenyl) propane (Catocene). The burning rate (BR) catalytic effect of P(FHEMA -co- MAA)s on thermal decomposition of AP was examined through thermogravimetry (TG) and differential thermogravimetry (DTG). P(FHEMA -co- MAA)s were found to have high catalytic effects in accelerating thermal decomposition of ammonium perchlorate (AP).
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 47
·e54711
·
IF 3
Yin Zhang,Yu Wang,Wei You
Based on derivatization of commercial poly(ethylene- co -vinyl acetate) (EVA), novel macromolecular UV-absorbers with polyethylene (PE) backbones and ferrocene side groups are presented in this study. The structures and properties of the polymers were analyzed using various techniques including Fourier transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance ( 1 H NMR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscope (SEM), and UV visible absorption spectroscopy. UV analysis experiments have shown that PE-grafted ferrocenyl ester (PE- g -FE) and PE-grafted azacyclo-ferrocene (PE- g -AF) with ferrocene side groups have the potential to act as UV absorbers. By using the polymers as additives for commercial PE, the anti-migration experiment demonstrates that PE- g -AF, with a heterocyclic structure, exhibits superior anti-migration performance than the ester-linked PE- g -FE. Furthermore, in comparison to commercial small-molecular UV absorbers (UV-329), the PE- g -AF absorber not only exhibits better UV absorption performance but also demonstrates almost zero migration behavior within the PE matrix.
研究领域:
材料科学
·
高分子化学
·
光化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Tongtong Ye,Xiaotong Wang,Li Wang,Shuna Ren,Lina Yang,Lihua Chen
This study investigates three metal–organic frameworks (MOFs) with distinct Brunauer–Emmett–Teller (BET) surface areas and pore sizes: MOFZr (1274 m2/g, <0.7 nm), MOFAl (371 m2/g, 1.5 nm), and MOFCr (1917 m2/g, 2 nm). Methylene blue (MB, 1.4 × 0.7 × 0.2 nm3) and triferrocene (tri-FC, 1.2 × 0.9 × 0.3 nm3) were adsorbed onto these MOFs. Specific DNA segments targeting SARS-CoV-2 (PR and PO) were employed to block the pores of the MOFs, leading to the formation of DNA-gated MOFs: MOFX/MB/PR and MOFX/tri-FC/PO. These constructs were subsequently integrated with four-arm poly(ethylene glycol) amine (4-arm-PEG-NH2)-modified gold electrodes to create the corresponding sensors (MOFX/MB/PR+MOFX/tri-FC/PO@4-arm-PEG-NH2@Au NPs@GCE). The DNA-gated MOFAl system exhibited the highest loading capacity and a 3-fold increase in sensing efficiency following the introduction of SARS-CoV-2 target DNA, surpassing the performance of the other systems. This study highlights the enhancement of the DNA-gated MOFs when the three-dimensional structures of the guest molecules closely align with the pore sizes of the MOFs. It emphasizes a critical aspect of the traditional design approach for electrochemical sensors based on MOF encapsulation, which often prioritizes BET surface areas while neglecting the compatibility between the sizes of guest molecules and MOF pore diameters. Moreover, the sensor effectively discriminated between SARS-CoV-2 and SARS-CoV by precisely aligning the SARS-CoV-2 target DNA with PR and PO. In contrast, the specific genetic targets (SR) from SARS-CoV showed complete mismatches with PO and a three-base deviation with PR. This differentiation was achieved in a simple one-step assay, even in 5% serum, across a linear concentration range of 10–9 to 10–14 M. This range signifies an expansion of 2 to 3 orders of magnitude compared to sensors that inaccurately selected MOFs.
研究领域:
分析化学
·
纳米技术
·
生物医学工程
·
病毒学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 7
·期 1
·119-132
·
IF 5.976
Xue-Peng Wei,Rui-Qian Zhang,Le-Bin Wang,Yan-Ling Luo,Feng Xu,Ya-Shao Chen
With the increasing development of science and technology, food analysis and detection techniques are continouosly being updated, consummated, and are booming. To meet the demands for high efficiency, speediness, and accuracy in food detection, new rapid detection technology needs to be developed for ensuring food safety and human heath. For this purpose, multi-walled carbon nanotubes decorated with gold nanoparticles-grafted poly(2-methacryloyloxyethyl ferrocenecarboxylate) (MWCNTs@Au-g-PMAEFc) nanohybrids were prepared through ATRP of MAEFc, with the MWCNTs@Au nanocomposites prepared via an in situ reduction route. The chemical structure and composition of the nanohybrids were characterized by 1H NMR, FTIR, Raman, XRD, TGA, UV-vis, and XPS techniques. The dispersion behavior and morphologies were investigated by UV-vis, TEM, and SEM observations. The electrochemical properties were studied by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The experimental results indicated that the nanohybrid-modified electrodes possessed clearly improved electrochemical properties and good reversibility of the redox process, which could be tuned by altering the composition proportions, including the mass ratios of MWCNTs to Au NPs, and the graft percentage of PMAEFc chain segments. The resultant modified electrode sensors could efficiently detect trace poisonous and harmful pesticide residues, and presented a good linear relationship between the concentration and the peak currents, giving a low limit of detection of about 2.7 × 10−8 mol L−1. The developed nanohybrids could therefore be fabricated into electrochemical sensors to detect trace pesticide for ensuring food safety.
研究领域:
材料科学
·
分析化学
·
食品安全
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Zhigang Yao,Benhua Zhang,Tingxizi Liang,Jie Ding,Qianhao Min,Jun-Jie Zhu
Cutting off the glucose supply by glucose oxidase (GOx) has been regarded as an emerging strategy in cancer starvation therapy. However, the standalone GOx delivery suffered suboptimal potency for tumor elimination and potential risks of damaging vasculatures and normal organs during transportation. To enhance therapeutic efficacy and tumor specificity, a site-specific activated dual-catalytic nanoreactor was herein constructed by embedding GOx and ferrocene in hyaluronic acid (HA)-enveloped dendritic mesoporous silica nanoparticles to promote intratumoral oxidative stress in cancer starvation. In this nanoreactor, the encapsulated GOx served as the primary catalyst that accelerated oxidation of glucose and generation of H2O2, while the covalently linked ferrocene worked as the secondary catalyst for converting the upstream H2O2 to more toxic hydroxyl radicals (•OH) via a classic Fenton reaction. The outmost HA shell not only offered a shielding layer for preventing blood glucose from oxidation during nanoreactor transportation, thus minimizing the probable oxidative damage to normal tissues, but also imparted the nanoreactor with targeting ability for facilitating its internalization into CD44-overexpressing tumor cells. After the nanoreactor was endocytosed by target cells, the HA shell underwent hyaluronidase-triggered degradation in lysosomes and switched on the cascade catalytic reaction mediated by GOx and ferrocene. The resulting glucose exhaustion and •OH accumulation would effectively kill cancer cells and suppress tumor growth via combination of starvation and oxidative stress enhancement. Both in vitro and in vivo results indicated the significantly amplified therapeutic effects of this synergistic therapeutic strategy based on the dual-catalytic nanoreactor. Our study provides a new avenue for engineering therapeutic nanoreactors that take effect in a tumor-specific and orchestrated fashion for cancer starvation therapy.
研究领域:
癌症治疗
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纳米技术
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生物医学工程
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2021
·Vol. 146
·期 6
·2445-2462
·
IF 4.626
Usman Muhammad,Yu Haojie,Wang Li,Titinchi Salam,Khan Amin,Naveed Kaleem-ur-Rehman,Nazir Ahsan,Elshaarani Tarig,Fahad Shah,Amin Bilal ul
Ferrocene (Fc)-based polymers have promising application in burning rate catalysts (BRCs) for solid composite propellants, and some of them have already been practically used. However, they have some drawbacks such as high migration during a long-time storage. Copolymers of poly(2-(methacryloyloxy) ethyl ferrocene carboxylate- co -glycidyl methacrylic acid)s (P(FHEMA -co- GMA)s) were synthesized to overcome the migration problem of Fc-based BRCs as well as to boost the burning rate (BR) of ammonium perchlorate (AP)-based propellants. The structures of the obtained P(FHEMA -co- GMA)s were confirmed by proton nuclear magnetic resonance ( 1 H NMR) and Fourier transform infrared (FT-IR) spectroscopy. Cyclic voltammetry (CV) method was used to study their electrochemical behavior, and the P(FHEMA -co- GMA)s showed redox behavior for the existence of the Fc units. Because of the formation of integrated network structures, the P(FHEMA -co- GMA)s have good anti-migration performances. The BR catalytic property of P(FHEMA -co- GMA)s were investigated by thermogravimetry (TG) and differential thermogravimetry (DTG). They showed competent catalytic effects on the thermal decomposition of AP.
研究领域:
材料科学
·
电化学
·
推进剂技术
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DOI
高影响因子
ACS Biomaterials Science & Engineering
·
2021
·
IF 4.749
Weiling Song,Pan Song,Yujie Sun,Zhonghui Zhang,Hong Zhou,Xiaoru Zhang,Peng He
A DNA structure-based nanoreactor has emerged as a promising biomaterial for antitumor therapy with its intrinsic biodegradability, biocompatibility, and tunable multifunctionality. Herein, the intelligent DNA nanohydrogel was reported to target cancer cells, control the size, be pH-responsive, and be loaded with glucose oxidase (GOx). Two kinds of X-shaped DNA monomers and DNA linkers were assembled to form a DNA nanohydrogel by hybridization. GOx was successfully encapsulated in the DNA nanohydrogel. The DNA linker was designed with i-motif sequences and modified with ferrocene (Fc). The i-motif-like quadruplex structures were formed in acidic tumor microenvironments, resulting in the disassembly of the DNA nanohydrogel to release GOx. The GOx could oxidize the intratumoral glucose to produce gluconic acid and H2O2. The generated H2O2 was catalyzed by Fc to induce toxic hydroxyl radicals (•OH), which could effectively kill cancer cells. Both the in vitro and the in vivo results demonstrated that the multifunctional DNA nanohydrogel had high-efficiency tumor suppression through combined chemodynamic and starvation cancer therapies.
研究领域:
纳米技术
·
癌症研究
·
生物医学工程
·
分子生物学
·
治疗学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
·
2024
·
IF 11.4
Wei Shi,Xueye Wang,Fei Gao,Zhiwei Wang
The effective removal of trace levels of the highly toxic arsenite (As(Ⅲ)) from groundwater is crucial to address the threat to drinking water supply. Herein, we developed an electrochemical separation system utilizing redox-active ferrocene-based metal-organic frameworks (termed Fe-DFc) for selective removal of As(III). This system leveraged 1,1′-ferrocenedicarboxylic acid as a ligand coordinated with iron, enabling the highly selective capture and conversion of As(III) from groundwater. The Fe-DFc electrode-based electrochemical system not only effectively removed As(III) even in the presence of a 1250-fold excess of competing electrolytes, but also converted about 96 % of the adsorbed As(III) into the less toxic As(V), surpassing the results of those documented in the current literature. X-ray absorption fine structure analysis and density functional theory calculations demonstrated that the high selectivity of Fe-O 6 moiety and the exceptional redox activity of Fc synergistically contributed to the efficient removal of As(III). Moreover, the electrochemical separation system enabled the remediation of arsenic-contaminated groundwater at a low energy cost of 0.033 kWh m −3 during long-term operation, highlighting the application potential of the electrochemical technology for arsenic removal from contaminated water.
研究领域:
环境科学
·
化学
·
材料科学
·
电化学
·
水处理
✓ 已验证
DOI
高影响因子
Biomaterials Science
·
2022
·Vol. 11
·期 2
·542-553
·
IF 7.59
Yang Liu,Jinzhu Chen,Zi He,Huiling Luo,Xinxin Liu,Yanan Sun,Dongtao Ge,Xin Liu,Wei Shi
Ferroptosis induced by iron-dependent accumulation of lipid peroxides (LPOs) has received increasing attention in cancer therapy, especially chemodynamic therapy (CDT). However, the quick annihilation of hydroxyl radicals (˙OH) severely restricts the ˙OH/LPO conversion efficiency, which has become one of the key factors that influences the therapeutic efficacy of ferroptosis-based CDT. Herein, we designed a ˙OH/LPO nano-converter with a high LPO generation efficiency via loading ferrocene (Fc), a green Fenton catalyst, in the phospholipid bilayer of liposome-PEG (Fc-Lp-PEG). Under catalysis with Fc, the over-expressed H2O2 in tumors can be decomposed to ˙OH. The generated ˙OH in situ reacts with unsaturated lipids on the liposome, and is converted into LPOs, which spread the lipid peroxidation chain reaction to the remote membranes of cells and organelles, triggering efficient cancer cell ferroptosis. Systematic in vitro and in vivo therapeutic outcomes showed the high tumor inhibition ratio (74.0%) and the low side effects of Fc-Lp-PEG on 4T1 tumor-bearing mice. This novel strategy for improving the ˙OH/LPO conversion efficiency might provide new insights for the clinical development of ferroptosis-based CDT.
研究领域:
癌症治疗
·
纳米技术
·
化学生物学
·
药学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）