JOURNAL OF ALLOYS AND COMPOUNDS
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2018
·
IF 3.779
Heru Wang,Lu Li,Chuncheng Zhu,Shuangyan Lin,Jing Wen,Qi Jin,Xitian Zhang
To solve the restacking of the Ti 3 C 2 T x nanosheets and destroy of electrode microstructure during cycles and gain high-performance electrode for supercapacitors , Ti 3 C 2 T x /PDA composite film electrode was rationally designed and successfully synthesized by one-step in situ polymerization of dopamine on the surface of the Ti 3 C 2 T x nanosheets. The as-synthesized Ti 3 C 2 T x /PDA composite electrode achieved a superior areal capacitance of 715 mF/cm 2 at a scan rate of 2 mV/s and maintained 95.5% of initial capacitance after 10000 cycles, exhibiting long-term cycling stability. The areal capacitance can be enhanced to 3440 mF/cm 2 when the mass loading increases to 13.6 mg/cm 2 . The improved electrochemical performance and outstanding electrochemical stability can be attributed to the effective suppressing the restacking of Ti 3 C 2 T x sheets and increasing interlayer spacing by introducing PDA, which could be beneficial to expose more surface active sites, shorten the diffusion path of electrolyte ions, promote electron transport and fast Faradaic reaction. Our work opens new design space to develop the high performance negative electrode materials.
研究领域:
材料科学
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电化学
·
能源存储
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产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2025
·
IF 6.9
Xinqi Zou,Zhenghao Ge,Chaobao Wang,Yuyang Xi
Water lubrication is environmentally benign and widely used in marine stern bearings, but its low viscosity and poor interfacial affinity limit effectiveness on inert polymers like UHMWPE. This study presents a mussel-inspired co-lubrication strategy by integrating polydopamine (PDA) and polyglutamic acid (PGA) into a composite suspension. The PDA–PGA system synergistically enhances interfacial adhesion and hydration lubrication, forming a stable, self-replenishing lubricating film. Tribological tests show a 19.7 % reduction in friction and 21.9 % reduction in UHMWPE wear compared to water. Surface analyses confirm nitrogen-rich film deposition and improved shear resistance. These improvements are attributed to amide bonding, hydrogen bonding, and hydration layer formation. This strategy offers an effective lubrication solution for high-load, submerged UHMWPE–metal systems such as water-lubricated marine bearings.
研究领域:
机械工程
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材料科学
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摩擦学
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船舶工程
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表面化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2022
·Vol. 10
·期 29
·5582-5593
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IF 7.571
Fei Kuang,Yingjie Chen,Wei Shan,Yonghai Li,Xichang Bao,Xiang Gao,Dong An,Meng Qiu
The multidrug resistance of bacteria caused by the abuse of traditional antibiotics poses a great threat to public health, so it is urgent to develop effective antibacterial agents to deal with this dilemma. Biomimetics and nanotechnology are expected to provide new strategies for solving this problem. This study takes inspiration from the adhesive protein properties of mussels to design and synthesise biomimetic polydopamine nanospheres (FeCo@PDA NPs), which have strong adhesion and catalytic Fenton reactive enzyme activity. The antibacterial activity of FeCo@PDA NPs against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) is significantly better than that of traditional antibiotics daptomycin (Dap) and vancomycin (Van). PDA NPs with an intrinsic hierarchical structure have the ability to adhere to bacterial surfaces and improve the loading rate of metal ions Fe2+/Co2+. In addition, due to the dual effects of strong adhesion and Co2+, FeCo@PDA NPs can destroy the bacterial membrane structure and release endogenous hydrogen peroxide, which increases the generation of reactive oxygen species by synergistic catalysis of bimetal ions Fe2+/Co2+ to further kill bacteria thoroughly. The cytotoxicity test results show that FeCo@PDA NPs have good cytocompatibility. The impressive antibacterial properties and good biocompatibility of FeCo@PDA NPs make them a potential antibacterial drug.
研究领域:
生物医学工程
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材料科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Long Cheng,Chengping Li,Xingqiao Wu,Ziyi Wang,Liuting Zhang,Wei Kong,Liang Wang,Petr Senin,Arkadii Proskurin,Ting Bian
As a promising and sustainable way for freshwater production, interfacial solar vapor generation technology often encounters harsh conditions such as fluctuating illumination, high salinity, bacterial growth, and acid/alkali corrosion, which can reduce its conversion efficiency and lifespan. Here, to address these challenges, an environmentally adaptive hierarchical structure incorporating plasmonic Ag nanoparticles, MoS 2 nanoflowers, and polydopamine (PDA) (MoS 2 @PDA/Ag) within a hybrid hydrogel matrix was designed as the functional solar evaporator. By systematically adjusting the volume ratio of cellulose nanofibers (CNF) and polyvinyl alcohol (PVA) skeletons, high evaporation efficiencies can be achieved in hypersaline conditions. Further, the cooperation of multi-photothermal materials endows the evaporator with a broad light absorption spectrum, superior photothermal conversion efficiency, and strong antimicrobial capabilities. The evaporator demonstrates a high evaporation rate of 2.79 kg m -2 h −1 under 1 sun irradiation and maintains sustainable evaporation for 8 h without salt deposition in 20 % NaCl solution. After being immersed in an acidic and alkaline seawater environment for 30 days, the evaporator shows no change in appearance, with only a slight decrease in performance. This work presents a promising platform for the development of solar evaporators with practical applications in various environmental conditions.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2023
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IF 11.1
Jiayi Li,Weixing Han,Heyao Liu,Minhua Su,Diyun Chen,Gang Song
The development and use of clean energy produced by nuclear power plants is becoming a major international trend, but it will inevitably lead to the problem of radionuclide pollution. Radioactive nuclear wastewater containing Cs and U and produced as a byproduct of coastal nuclear power production can cause substantial environmental pollution . In order to simultaneously remove radioactive cesium and uranium, polydopamine (PDA) inlaid ammonium phosphomolybdate (AMP) has established a hydrophilic functional structural film on the surface of Fe 3 O 4 , forming AMP@PDA@Fe 3 O 4 (APF) which is used to simultaneous remove Cs(I) and U(VI). Using the pH sensitive range of APF adsorption in the process of adsorbing Cs(I) and U(VI), synergistic adsorption can be achieved under the condition of weak acidity to neutral. The effects of temperature, and common cations on Cs(I) and U(VI) adsorption by APF were investigated, the adsorption was found to be sensitive to the presence of K + . The efficiency of Cs(I) and U(VI) adsorption by APF was 99.88% and 98.39%, respectively. The Cs(I) adsorption process was primarily ion exchange with NH 4 + within APF composite, whereas that for U(VI) was primarily C-O complexation. Both the Cs(I) and U(VI) adsorption reactions were consistent with second-order kinetic and Langmuir isothermal adsorption models. After five cycles of experiments the removal efficiency of Cs(I) and U(VI) can reach 64.88% and 79.81%, respectively. APF was also found to have high selectivity for Cs and U in seawater with high salt content at pH 6.0–7.0. In mimic contaminated seawater, the efficiency of Cs(I) and U(VI) removal was 97.65% and 84.63%, respectively. These findings provide references for the remove of Cs(I) and U(VI) from radioactive wastewater , making the process of energy production safer.
研究领域:
环境科学
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材料科学
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核能工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
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IF 4.527
Mengting Jiang,Liwen He,Chao Duan,Xiaoping Ouyang
Poor fracture toughness is a major limitation of SiC ceramics, which greatly affects their application range. Herein, a novel strategy is proposed to enhance the fracture toughness of SiC ceramics by cross-linking carbon nanotubes (CNTs) coated with polydopamine (PDA) to Ti 3 C 2 modified with 3-glycidyloxypropyltrime-thoxysilane (KH560) (PDA-CNTs@f-Ti 3 C 2 ). Then, PDA-CNTs@f-Ti 3 C 2 was added to SiC powder to prepare the final composite. The influence of PDA-CNTs@f-Ti 3 C 2 addition on the microstructure and mechanical properties of the SiC composite is discussed. The results showed that, compared with CNTs and Ti 3 C 2 , the PDA-CNTs@f-Ti 3 C 2 composites exhibited better dispersibility in water. The flexural strength was significantly enhanced (~89%) in the SiC composite containing 3 wt% PDA-CNTs@f-Ti 3 C 2 , from 228.99 MPa to 433.55 MPa. The fracture toughness of the SiC composite containing 3 wt% PDA-CNTs@f-Ti 3 C 2 improved by 62%, from 3.97 MPa/m 1/2 to 6.44 MPa/m 1/2 .
研究领域:
材料科学
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机械工程
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Qin Zhang,Zhongsheng Chen,Jiangang Li,Xiancai He,Wei Peng,Chunpei Yan,Guolin Huang
Nuclear energy is considered to be a clean, low-carbon, efficient and sustainable source of energy, which is used in a great variety of fields. However, the generation of a large quantity of wastewater containing uranium has posed a potential threat to our human well-being and ecological environment. Efficient separation of radioactive U(VI) from uranium-bearing wastewater is of great importance for humanity. Herein, a novel adsorbent UiO-66-NH 2 @phos-PDA(abbr. U6N@phos-PDA) was prepared by using phosphate and UiO-66-NH 2 encapsulated by PDA. The effects of various conditions such as solution pH, contact time and U(VI) concentration on the U(VI) adsorption process were explored by batch experiments. The kinetic study revealed that the adsorption equilibrium time of U(VI) by U6N@phos-PDA was 150 min, and the adsorption process adhered to the pseudo-second-order kinetic model, with chemisorption being the dominant mechanism. At 298 K, U6N@phos-PDA was able to adsorb U(VI) up to 423.23 mg/g. The Langmuir isotherm model describes the adsorption behavior, which was dominated by adsorption on the surface monolayer. Thermodynamic analysis indicated that U(VI) adsorption by U6N@phos-PDA is a spontaneous endothermic process. Additionally, U6N@phos-PDA exhibited excellent selectivity for U(VI) adsorption in the presence of other metal ions and can be reused effectively for at least five cycles. The FT-IR and XPS characterization analyses demonstrate that the phosphate and amino functional groups of U6N@phos-PDA are crucial for ion exchange and complexation with U(VI). Therefore, U6N@phos-PDA shows promising potential for the separation of U(VI).
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
International Journal of Nanomedicine
·
2025
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IF 6.5
Can Li,Guiju Chen,Xiongwei Yan,Bingyang Hu,Xiangyun Zhang,Jun Song
Introduction Osteoarthritis (OA) is one of the major menaces to human health. Currently, no sufficiently effective medications are available to treat OA clinically. OA is an inflammatory joint disorder. The overproduction of reactive oxygen species (ROS) plays a critical role in initiating and developing OA pathogenesis. ROS scavenging has become a vital target for OA therapy. Although chromium sesquioxide (Cr2O3) nanoparticle has been proven to have excellent ROS scavenging ability, its clinical application is limited due to its poor biocompatibility. Polydopamine (PDA) is an excellent carrier with outstanding biocompatibility. PDA-based nanomaterials exhibit significant potential for various ROS-related diseases.Methods PDA was synthesized through oxidative autopolymerization of dopamine in an alkaline environment. Subsequently, the novel nanozyme PDA-Cr2O3 was synthesized by loading Cr2O3 onto PDA nanoparticles with the assistance of hydrazine hydrate. Afterward, the cytotoxicity and ROS scavenging capacity of PDA-Cr2O3 were examined. Finally, the ability of PDA-Cr2O3 to treat OA was explored at both cellular and animal levels.Results PDA-Cr2O3 had low cytotoxicity and toxic side effects in vivo. Moreover, PDA-Cr2O₃ exhibited a remarkable capacity to scavenge ROS both in cell-free in vitro systems, such as kit-based assays, and in cellular models. It also dramatically decreased the transcriptional level of inflammation-associated genes and the secretion of inflammatory factors of the OA chondrocytes. In animal experiments, PDA-Cr2O3 markedly suppressed the progression of OA.Conclusion PDA-Cr2O3 nanozyme had good biocompatibility and could effectively suppress the development of OA by efficiently scavenging ROS, which has important application prospects in OA treatment. This study might offer some new ideas for the treatment of ROS-related diseases.
研究领域:
纳米医学
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生物化学
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药理学
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材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
SYNTHETIC METALS
·
2021
·
IF 3.266
Yuhua Dong,Kexin Wu,Yuanyuan Yin,Chundong Geng,Qiong Zhou
PPy@PDA nanoparticles , prepared by varying ratios of PPy and dopamine hydrochloride, could be used as near infrared (NIR)-absorbing photothermal agents given that the UV–vis–NIR light absorption spectra showed a broad absorption band at 800–900 nm. A NIR-induced shape memory-assisted self-healing epoxy resin coating was obtained, and its shape memory effect was investigated by 808 nm NIR irradiation. Results indicated that the addition of PPy@PDA nanoparticles improved the shape recovery behavior of the composite. The self-healing property of the coatings was investigated by electrochemical test. Results of linear sweep voltammetry (LSV) and electrochemical impedance spectra (EIS) verified that the coating with 5 wt% PPy@PDA nanoparticles had a much better light-induced shape memory effect, self-healing performance, and protective capability than those of other contents of PPy@PDA nanoparticles. Moreover, the shape memory effect of the coating should be affected by the corrosion product of the metallic substrate.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2022
·
IF 7.34
Pan Wang,Mengxue Wang,Tao Song,Jiaqi Chen,Xidi Liu,Xiaoyang Liu,Yong You,Huijin Song,Kui Li,Ying Li,Wei Feng,Xulin Yang
Separating of oil-water emulsions under harsh conditions is a major challenge for membrane-based filtration systems. In this study, a well-stabilized electrospinning nanofibrous membrane was successfully fabricated by combining a high-performance engineering polyarylene ether nitrile (PEN) with polydopamine (PDA), and silver nanoparticles (Ag NPs). The employed PEN has comprehensive performance in thermoresistant, anti-corrode and mechanical properties, which was expected to be a robust polymer matrix. Ag NPs were loaded on PEN electrospinning nanofibrous membranes via PDA coating and in situ growth. Morphological measurements revealed a hierarchical structure of fabricated Ag@PDA/PEN membrane with Ag NPs formed in situ covered on the surface. The particle size of Ag NPs was mainly in the range of 50–85 nm and the diameter of PEN fiber was located at∼0.39 μm. The water contact angle (CA) of membranes increased from 30 o to 130 o by the increasing Ag NPs formation. As a result, the prepared composite membranes reached 4978.71 L/m 2 h and 99 % for permeate flux and good retention rate for oil-water emulsion separation, respectively. Moreover, the high-performance PEN further endowed the tough stability and durability of the obtained composite membranes, which can tolerate corrosive emulsions, resist high temperatures, and maintain a high separation efficiency after cycle reuse. Furthermore, the as-prepared membranes demonstrated excellent anti-bacterial properties (>99.99 %) inherited from the introduction of Ag NPs. Therefore, the comprehensive anti-corrode, anti-heat, and anti-bacterial performance provide the fabricated robust Ag@PDA/PEN electrospinning nanofibrous membrane a broad prospect for purifying water resources, especially industrial wastewater treatment under harsh conditions.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2024
·
IF 3.5
Chiyin Zhang,Panping Yang,Jingguo Li,Shaokui Cao,Yingliang Liu,Jun Shi
The design of multifunctional nanocarriers with enhanced photothermal efficiency is of great significance for the photothermal therapy of cancer. In this study, hollow CuS@gold nanorods/polydopamine (HCuS@AuNRs/PDA) nanohybrids with synergistically enhanced photothermal efficiency were prepared by electrostatic self-assembly method. The high photothermal conversion efficiency of HCuS@AuNRs (55.88%) is attributed to the interfacial electron transfer between CuS and AuNRs, as well as the increase in free charge carrier concentration. The excellent adhesion performance and strong negative charge of PDA ensure a high doxorubicin hydrochloride (DOX) loading efficiency of 96.08% for HCuS@AuNRs/PDA. In addition, HCuS@AuNRs/PDA reveals outstanding NIR/pH dual-responsive drug release properties owing to the weakened interaction between PDA and DOX in acidic media and the distinct NIR responsiveness of HCuS@AuNRs. In vitro cell viability results confirm that HCuS@AuNRs/PDA could efficiently kill tumor cells under the dual effect of acidic media and NIR laser. This study presents a novel nanocarrier with synergistically enhanced NIR photothermal responsiveness and high drug loading capacity, which provides a versatile platform in intelligent drug release and photothermal therapy.
研究领域:
生物医学工程
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肿瘤学
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纳米医学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 7
·4518-4532
·
IF 3.9
Dazheng Ci,Ning Wang,Yunqi Xu,Shanshan Wu,Jing Wang,Haoran Li,Shouhu Xuan,Qunling Fang
Wastewater discharged from industrial, agricultural and livestock production contains a large number of harmful bacteria and organic pollutants, which usually cause serious harm to human health. Therefore, it is urgent to find a “one-stone-two-birds” strategy with good antimicrobial and pollutant degradation activity for treating waste water. In this paper, SiO2@AuAg/Polydopamine (SiO2@AuAg/PDA) core/shell nanospheres, which possessed synergistic “Ag+-release–photothermal” antibacterial and catalytic behaviors, have been successfully prepared via a simple in situ redox polymerization method. The SiO2@AuAg/PDA nanospheres showed good catalytic activity in reducing 4-nitrophenol to 4-aminophenol (0.576 min−1 mg−1). Since the AuAg nanoclusters contain both gold and silver elements, they provided a high photothermal conversion efficiency (48.1%). Under NIR irradiation (808 nm, 2.5 W−2), the catalytic kinetics were improved by 2.2 times. Besides the intrinsic Ag+-release, the photothermal behavior originating from the AuAg bimetallic nanoclusters and the PDA component of SiO2@AuAg/PDA also critically improved the antibacterial performance. Both E. coli and S. aureus could be basically killed by SiO2@AuAg/PDA nanospheres at a concentration of 90 μg mL−1 under NIR irradiation. This “Ag+-release–photothermal” coupled sterilization offers a straightforward and effective approach to antimicrobial therapy, and further exhibits high potential in nanomedicine for combating bacterial contamination in environmental treatment and biological fields.
研究领域:
环境科学
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纳米医学
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）