ACS Applied Materials & Interfaces
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2022
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IF 10.383
Zhenji Zhou,Caiyin You,Zhong Li,Weimin Xia,Na Tian
Magnetic nanofiller is helpful for improving the piezoelectric properties of P(VDF-TrFE)-based composites, which shows promising potential as a flexible sensor or energy harvester. In this work, we use the interaction between the magnetic nanofiller and magnetic field to modify the structure of CoFe2O4 (CFO)@polydopamine (PDA)/P(VDF-TrFE) composite, in which CFO@PDA works as the nanofiller into the P(VDF-TrFE) matrix. It was found that the magnetic field orientation during polymer curing can significantly increase the content of the β-phase and d33 of the composite. Regarding a typical composite film with 7 wt % CFO@PDA, the composite exhibits versatile sensing originated from the ball impact, hot-water droplet, bending, and pressing. In a noncontact magnetic field-driven experiment, the magnetic field oriented film produced the highest output voltages of 17.4 mV at 4 Hz and 12 mV at a drive amplitude of 19 Vpp, in contrast to the values of 7.1 mV and 7 mV for the film without magnetic field orientation, respectively. The LED without any charging capacitor can be instantaneously lighted through vertically pressing the oriented films. Thus, this work proposes a strategy of magnetic field orientation to improve the piezoelectric performance of the CFO@PDA/P(VDF-TrFE) multifunctional composite film.
研究领域:
材料科学
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传感器技术
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DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 44
·10678-10691
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IF 7
Guanghui Liu,Hongfa Wang,Chunyan Xu,Qunling Fang,Hailong Wang,Yunqi Xu,Min Sang,Shouhu Xuan,Lingyun Hao
With the rapid development of social industrialization, environmental problems seriously threaten people's health, especially water pollution. Therefore, there is an urgent need to construct a multifunctional nanoplatform for different scenarios. Two-dimensional MXene@AgAu@PDA nanosheets loaded with AgAu bimetallic nanocages have been prepared by a one-step method. First, the in situ generated MXene@Ag is used as an auxiliary template, and then HAuCl4 and dopamine are added for in situ redox-oxidizing polymerization reactions to obtain AgAu catalytic nanocages and the protective polydopamine (PDA) layer which can improve the stability and biocompatibility. MXene and PDA have excellent photothermal conversion ability while hollow AgAu nanocages have strong absorption in the near-infrared region and a local surface plasmonic resonance effect. In comparison to the catalytic reaction rates under dark and room temperature conditions, the catalytic kinetic rate of MXene@AgAu@PDA nanosheets under near-infrared irradiation increases from 0.13 to 0.69 min−1 mg−1. Density functional theory (DFT) is used to study the electron transfer behavior between AgAu nanocages and MXene nanosheets, and the mechanism of the enhanced catalytic reaction rate is analyzed. Besides, due to its Ag ions and photothermal coupling antibacterial properties, 40 μg mL−1 MXene@AgAu@PDA nanosheets inactivates nearly all E. coli and S. aureus after irradiation with near-infrared light for 6 min.
研究领域:
环境科学
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材料科学
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生物医学工程
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DOI
PubMed
高影响因子
POLYMER BULLETIN
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2024
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IF 3.1
Zhang Beibei,Zhang Lihua,Li Jin,Qiang Qi
Carbon emission reduction has been accepted as a common concern all over the world. Currently, CO 2 emission is mainly derived from the consumption of fossil fuels. To solve this issue, there is an urgent need to develop technologies for CO 2 capture. The utilization of membrane technology to remove CO 2 from a mixture gas attracts great interest. In the present work, poly(2-hydroxyethyl methacrylate- co -vinylamine) was synthesized by polymerization ( n -vinyl formamide and 2-hydroxyethyl methacrylate), hydrolysis, and ion exchange. The surface function of graphene oxide was carried out by aerobic self-polymerization of dopamine. The mixed matrix membranes were fabricated by adding the nanofiller (before and after modification) into the polymeric matrix. The membrane properties and its structure were characterized by FTIR, TGA, XRD, and SEM. The effect of nanofiller content and operation conditions on membrane performance was investigated. Results showed that the additions of nanofiller could decrease the crystallization of these membranes and effectively improve gas permeance. Remarkably, for the addition of 2.0 wt% dopamine-modified graphene oxide, the CO 2 permeance of the membrane was increased by 30.9% while achieving a CO 2 /N 2 selectivity of 83.5. The CO 2 permeation for CO 2 /CH 4 was also increased by 16.77%. These were surpassed over the 2008 Robeson’s upper bound. These resultant membranes demonstrated attractive potential for low-pressure post-combustion CO 2 capture. Besides, the stability of longtime tests on membranes was studied, and it was observed that membranes exhibited excellent stabilization with continuously operated for 220 h. The excellent properties of these membranes provide new opportunities for gas separation applications.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
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IF 18.5
Qi Zeng,Chenyang Xing,Zhen Xu,Qing Liu,Liangtao Yang,Hui Yang,Yi Zhang,Zhengchun Peng
Bioelectrode is critical to many biomedical researches. However, traditional materials (typically noble metals) and manufacturing techniques limit the large-scale production of bioelectrodes. Herein, a fast electrochemical approach is proposed to deposit versatile MXene/polydopamine (PDA) composites on a metalized substrate. PDA coating can improve the adhesion between MXene and the substrate, while MXene provides rough surfaces with unique micro/nanostructure and outstanding electrical/optical/thermal performance. The impedance of the as-prepared bioelectrode at 1 kHz is down to 8.48 Ω cm 2 . The corresponding cathodic charge storage capacity (CSC c ) and charge injection capacity (CIC) are up to ≈250 and 6.59 mC cm −2 respectively, much superior to that of bare Pt and other conventional material-based electrodes. The MXene/PDA composites also demonstrate robust stability under continuous electrostimulation for 1 × 10 8 pulse cycles and 1000 CV cycles. Moreover, MXene/PDA composites show a high and rapid photothermal response. Photoelectrochemical activity is also observed with high photocurrent, ≈40 folds larger than that of bare Pt. The utility of this new electrode in ascorbic acid sensing is demonstrated. Excellent biocompatibility is verified via neuron adhesion test and viability assay.
研究领域:
生物医学工程
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材料科学
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神经科学
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Tiantian Chen,Zhihan Zhang,Xiaohu Zhou,Zhiyue Zhang,Jun Liu,Qirui Gong,Tengda Ma,Abulimiti Dilihumaer,Yuhang Zhan,Zhizhong Xie,Lihong Fan,Yue Zhang,Shengxiang Tao,Yingying Chu
Osteochondral defects are common orthopedic conditions that can lead to osteoarthritis and severe joint pain. Recently, smart biohydrogels have been widely applied in osteochondral repair and regeneration, owing to their 3D structural resemblance to osteochondral tissues and their remarkable responsiveness to external stimuli. Glucosamine hydrochloride (GH) has been proved to stimulate the proliferation and chondrogenic differentiation of bone mesenchymal stem cells (BMSC), thereby accelerating wound healing and tissue regeneration. Herein, double-crosslinked smart hydrogels SPA 5 -Mg/GH/FP are fabricated using sodium alginate, acrylamide and N-Isopropylacrylamide (NIPAM) as the substrates. Simultaneously, the incorporation of Mg 2+ and Polydopamine (PDA)-coated Fe 3 O 4 NPs into the system further enhanced its properties. The results emphasized the favorable microenvironment created by the 3D architecture of the hydrogel, which effectively facilitated tissue repair and regeneration of the defects. Notably, the controlled release of GH aligned with the repair process is achieved through the responsiveness of Fe 3 O 4 @PDA NPs to near-infrared light. Moreover, in vivo assessments have demonstrated the effectiveness of the smart hydrogel in repairing osteochondral defects, highlighting its structural similarities to native tissue. This promising outcome underscores the potential of SPA 5 -Mg/GH/FP as a sophisticated solution for addressing the challenges associated with osteochondral repair.
研究领域:
生物材料学
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再生医学
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骨科
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DOI
高影响因子
FOOD CHEMISTRY
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2024
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IF 8.5
Jingfang Guo,Feng Zhao,Zhenhui Yue,Zhen Lei
Rapid and accurate detection of carbosulfan residues in vegetables is important for ensuring food safety. Herein, based on the unique hydrolysis behavior of carbosulfan, a nanozyme-based colorimetric sensing platform was proposed for detection of carbosulfan. Hollow polydopamine/MnO 2 nanoparticles (H-PDA/MnO 2 NPs) with excellent oxidase-like activity were synthesized, which can promote the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) into blue oxidative product (oxTMB). Under acidic conditions, carbosulfan can be decomposed and produce reductive sulfide species (-SH), which are capable to disintegrate MnO 2 NPs, resulting in decreased oxidase-like activity of H-PDA/MnO 2 NPs. Based on the inhibitory effect on oxidase activity of H-PDA/MnO 2 NPs, an acetylcholinesterase-free colorimetric assay was proposed for detection of carbosulfan with low limit of detection of 0.63 ng mL −1 . Integrating test swabs with smartphone, a portable colorimetric sensor was constructed, showing great potential for on-site detection. To demonstrate the feasibility of this method, carbosulfan in real vegetable samples were determined.
研究领域:
食品安全
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分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2024
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IF 2.7
Zhaohuang Zhong,Lang Li,Siwei Yu,Xindong Li,Haike Li,Jianghui Jia,Jiaju Huang,Meng Cai,Wanfu Huang
With the growing complexity of separation systems, the application of thin film composite nanofiltration (TFN) membranes in organic solvent separation faces numerous challenges. To augment its solvent stability, an in-situ constructed dopamine hydrogel doped with UiO-66@CNT was developed as an intermediate layer on a polyetherimide (PEI) ultrafiltration membrane. Subsequent interfacial polymerization on this interlayer led to the formation of a solvent-resistant nanofiltration membrane with a vast covalent bond structure, large specific surface area, and enhanced hydrophilicity. Our findings revealed that when the CNT loading in the UiO-66@CNT composite nanoparticles was 2 wt%, the TFN-U 2 C 2 membrane exhibited a maximum pure water flux of 126.32 L/(m 2 ·h) and a methanol flux of 45.45 L/(m 2 ·h). The rejection rates for Congo red aqueous and methanol solutions were 96.88% and 92.14%, respectively. The membrane also demonstrated commendable anti-fouling properties. Remarkably, even after 48 h of immersion in various organic solvents, the membrane retained its morphology and separation efficiency. Compared to the TFN-U 2 membrane without CNT addition, the enhancement in separation performance was considerably significant. Hence, this membrane has significant potential for application in treatment of wastewater containing organic solvents and is promising in related fields.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2025
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IF 8.2
Haiyan Zhang,Yitong Chen,Yanhui Wei,Xiaokang Zhang,Hongchao Ma
The development of metal-based redox nanozymes represents a new frontier in pollutant sensing. In this field, designing highly active nanozymes and precisely regulating their enzymatic activity are key challenges. In this work, we report the construction of a copper peroxide@polydopamine (CuO2@PDA) nanozyme with dual enzyme-like activity, mimicking the active centers of laccase and peroxidase. Here, CuO2 acts as the catalytic center, while PDA serves as a carrier to prevent CuO2 aggregation and promotes conversion of CuII/CuI active sites via the reduction effect of its surface catechol groups to complete the catalytic cycle. As expected, the obtained CuO2@PDA nanozyme exhibits significant laccase- and peroxidase-mimetic activities. Moreover, its dual enzymatic activity can be systematically switched by adjusting pH and temperature. Specifically, laccase activity dominates near neutral pH, while CuO2 decomposition into Cu ions and H2O2 at acidic pH triggers peroxidase activity. Similarly, CuO2@PDA exhibits temperature-dependent dual enzymatic activity with peroxidase activity prevailing at low temperatures and laccase activity at high temperatures. According to enzymatic performance and XPS results, a possible catalytic mechanism of the dual enzymatic activity of CuO2@PDA has been proposed. Then, based on the pH-dependent dual enzymatic activity of CuO2@PDA, we constructed a detection system for the isomers of organic pollutants, catechol (CC) and hydroquinone (HQ). The laccase-like activity of CuO2@PDA enables direct oxidation of CC into yellow o-benzoquinone, while HQ discolors the preoxidized substrate generated via the peroxidase-like activity of CuO2@PDA. Moreover, selective sensing for CC and HQ with high sensitivity was achieved in real water samples. This approach can guide the design of nanozymes with multienzymatic activity and unveil their potential uses in environmental pollutant discrimination.
研究领域:
环境科学
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生物化学
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纳米材料
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DOI
PubMed
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2019
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IF 3.834
Wenjing Cheng,Yun Li,Xiaoying Li,Wenjing Bai,Yunxiao Liang
A monolithic macroporous silica (MMS) was prepared by using a pillared epoxy resin macroporous polymer as template. Polydopamine (PDA) as a spacer-arm polymer was modified on the surface of MMS for immobilization of Candida rugosa lipase (CRL), aiming to improve the performance of CRL and overcome the limitations of the immobilized enzymes on mesoporous materials and fine particles. The immobilization conditions and the properties of the immobilized CRL were investigated. The as-prepared monolithic macroporous materials were characterized by SEM, TEM, MIP, BET, FT-IR and TG-DTA. The results revealed that MMS possessed two sets of well-defined and uniform continuous macroporous channels (pore size of 300–500 nm), high mechanical strength, large pore volume and specific surface area, and that the PDA/MMS macroporous composite was constructed by PDA/SiO 2 /PDA nano-film with a thickness of about 50 nm. Because of its surface chemical properties and unique macropore structure, the PDA/MMS composite provided a simple, cost-effective way to enhance the catalytic activity of directly immobilized enzyme. The activity recovery of CRL–PDA/MMS was 201%, and the stability of the immobilized lipase was remarkably improved. Moreover, this biocatalyst can be easily recovered from the reaction system without centrifugation or filtration.
研究领域:
生物化学
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材料科学
·
酶工程
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
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IF 5.1
Zeyu Wu,Linghao Zhao,Yangkun Sun,Yufeng Zhang,Yuerong Wang,Min Zhang,Hongyang Zhang,Fanghong Ning,Ping Hu
Hydrogen peroxide (H 2 O 2 ), a type of reactive oxygen species (ROS) produced by cells, plays a significant role in various physiological processes. Its abnormal concentrations in human body are closely associated with cellular damage as well as a variety of major diseases. Consequently, sensitive and accurate detection of cellular H 2 O 2 concentration is of great significance in evaluating the degree of intracellular oxidative stress in human cells. In this study, a novel heterogeneous nanomaterial, rGO@PDA@MXene-Au@COF, was designed for electrochemical-colorimetric dual-mode detection of intracellular H 2 O 2 , which enhances both peroxidase and electrochemical activities, achieving lower detection limits and broader linear ranges. ESR spectroscopy, EIS resistance analysis and computational simulation were employed to verify the mechanism of the activity enhancement, and the detection conditions were optimized. The methods were subsequently applied to the determination of H 2 O 2 in cells, yielding results of 1.69 × 10 −14 M H 2 O 2 /cell and 1.59 × 10 −14 M H 2 O 2 /cell for electrochemical and colorimetric detection of MCF-7 cells, and 1.67 × 10 −14 M H 2 O 2 /cell and 1.58 × 10 −14 M H 2 O 2 /cell of Hela cells, respectively. These results demonstrated high sensitivity and anti-interference capabilities, enabling quantitative detection of H 2 O 2 in complex cellular environments. Furthermore, the similarity in results between the two methods confirms their mutual accuracy and reliability. This work provided a novel approach for designing multifunctional nanomaterials and detecting H 2 O 2 in cells.
研究领域:
纳米技术
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电化学
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生物传感器
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分析化学
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细胞生物学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Longwen Li,Lin Chi,Hongxu Zhang,Shuming Wu,Han Wang,Zhimin Luo,Yanwei Li,Yanhui Li
This article prepared a nanoparticle (NP) Ti-PDA made from bis (2-hydroxy propionic acid) diammonium titanium hydroxide (Ti-BALDH) chelating dopamine (DA), as a photocatalyst to absorb and reduce hexavalent chromium (Cr(VI)) under visible light with recycling ability from waste water. Ti-PDA NPs with part of TiO 2 -like structure can perform some function of TiO 2 , while participation of PDA will not only broaden absorption spectrum from UV to visible light, but offer the ability to absorb Cr(VI). Compared with TiO 2 Ti-PDA NPs would make full use of sunlight, increasing the photocatalytic efficiency. The adsorption results of Ti-PDA NPs for Cr(VI) showed that the adsorption capacity of Ti-PDA NPs can reach 500.24 mg/g when the concentration of Cr(VI) was 300 mg/L, and the adsorption data matched well with the Langmuir isotherm model, and confirmed to a quasi-second-order dynamics. Under visible light irradiation, Ti-PDA NPs could reduce Cr(VI) to Cr(III) within 30 min, and can almost completely reduce Cr(VI) within 15 min even at pH = 4. After three cycles, photocatalytic reduction efficiency was still 95.02%. Thereby the toxic Cr(VI) can be effectively eliminated by Ti-PDA NPs from sewage. As a result, Ti-PDA will be a promising green photocatalyst to remove Cr(VI) in disposal of water pollution.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 31
·e202402076
·
IF 1.9
Hengyi Cheng,Xun Zhang,Tao Zhang,Yixiang Chen,Dan Yu,Wei Wang
Graphical The figure shows the preparation process of TPU/PDA/MXene composite fibers. TPU fibers were first prepared by dissolving TPU particles in a certain amount of DMF solution, but since TPU fibers are inherently non-conductive, it was necessary to surface modify the TPU fibers. PDA was polymerized in situ on the fiber surface and then placed in MXene solution for ultrasonication to obtain composite fibers. With the development of the ageing society, wearable strain sensors have great application prospects in the fields of health detection, artificial intelligence, and motion recognition. However, traditional forms of film-like strain sensors suffer from low sensitivity, adhesion, and impermeability during use, which severely limit their practical applications. To overcome these problems, we propose a strategy to fabricate polyurethane/polydopamine/MXene (TPU/PDA/MXene) composite fibers by wet spinning. Furthermore, the outside is wrapped with (PDMS), giving mechanical strength and chemical resistance. Through a simple and low-cost wet spinning process, TPU/PDA/MXene fibers are achieved in the preparation of flexible strain sensors, and they can be woven into various forms with good flexibility and comfort according to practical needs. The results indicated that the prepared flexible strain sensor exhibits a high gauge factor (GF) of 57.15 over a large strain range (300 %), which are superior to those of many fiber-based sensors. Their application properties were also measured by attaching them to fingers, wrists and knees, showing high sensitivity, mechanical durability and chemical stability, and has great potential for wearable strain sensors and flexible strain sensors in complex environments.
研究领域:
材料科学
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生物医学工程
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传感器技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）