CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zhongyang Zheng,Heping Li,Fangjian Li,Liyu Zheng,Shenming Yin,Xinyun Wang,Youwei Yan
Two-dimensional materials, impermeable to various mediums, have ignited the great interest in developing multifunction nanocomposite coatings. Even though Al 2 O 3 has excellent thermal and chemical stability, it is hard to obtain Al 2 O 3 nanosheets from their non-lamellar structured bulk counterparts. In this work, we have developed a bottom–up strategy to synthesize several-nanometer thick Al 2 O 3 nanosheets by taking graphene oxide as the templates, and further improved their dispersibility by modifying them with poly-dopamine (PDA). These PDA-modified Al 2 O 3 nanosheets were then successfully integrated into the nanosized ZrO 2 coating to enhance its anti-corrosion and gas permeation reduction properties. With the Al 2 O 3 nanosheets inserted, corrosion resistance and deuterium resistance of the ZrO 2 coating were increased by 1000% and 1557%, respectively, both of which were above two orders of magnitude higher than that of the 321 steel substrate. The significant improvements achieved by Al 2 O 3 nanosheets demonstrate their capacity to effectively block the diffusion of both ions and deuterium atoms. This work not only offers a new platform for fabricating nanosheets from non-lamellar structured materials, but also indicates tremendous potential of Al 2 O 3 nanosheets as a novel filler for developing high-performance functional coatings.
研究领域:
材料科学
·
表面工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Zihan Kang,Mengshi Chen,Jiang Wu,Ni Qin,Dinghua Bao
Piezocatalytic technology with controllable generation of reactive oxygen species (ROS) is emerging in wastewater treatment. This study employed the synergetic regulation of functional surface and phase interface modification to effectively accelerate redox reaction in piezocatalytic process. We anchored the conductive polydopamine (PDA) onto Bi 2 WO 6 (BWO) using template method, in which a small amount of Bi precipitation to induce partial phase transition of BWO from tetragonal to orthorhombic (t/o) in virtue of simple calcination. ROS traceability studies have identified the synergistic relationship between charge separation and transfer. Polarization in two-phase coexistence is intimately modulated by the orthorhombic relative central cation displacement. The orthorhombic phase with large electric dipole moment significantly promotes the generation of piezoresistive effect of intrinsic tetragonal BWO and optimizes the charge distribution. PDA further overcomes the obstruction of carrier migration at the phases interface to accelerate the generation rate of free radicals. Consequently, the superior rhodamine B (RhB) piezocatalytic degradation rate of 0.10 and 0.32 min −1 were delivered by t/o-BWO and t/o-BWO@PDA, respectively. This work reveals a feasible polarization enhancement strategy for the phase coexistence, and flexibly introduces the in-situ synthesized economical polymer conductive unit into the piezocatalysts.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
ChuanYao Zhai,QingBo Sun,AnQuan Ma,WenHao Wang,TianTian Zhu,Yan Zhang,TianJiao Yu,ZiQing Yang,Jing Lan,ZhiFeng Wang
Bone defect repair relies on the reconstruction of the maxilla and alveolar bone. Magnesium and its alloys offer great potential as implant materials due to their biocompatibility and mechanical properties, but their rapid degradation limits clinical use. This study developed an MgF 2 -polydopamine-Epigallocatechin gallate (MgF 2 -PDA-EGCG) composite coating on AZ31B magnesium alloy using hydrofluoric acid fluorination and layer-by-layer self-assembly. The coating’s corrosion resistance, biocompatibility, antibacterial properties, and osteogenic potential were evaluated. Characterization showed a dense, uniform coating (∼5.6 ± 0.2 μm thick) that significantly improved corrosion resistance. In a seven-day hydrogen evolution test and long-term immersion study, the P2E0.5 coating reduced hydrogen release (0.57 ± 0.16 mL/cm 2 ) and mass loss (7.31 ± 0.83%). Biocompatibility tests (CCK-8 and live/dead staining) confirmed no cytotoxicity. Antibacterial tests showed inhibition rates of 75.8% for Escherichia coli and 83.43% for Staphylococcus aureus. ALP activity was 188.18% ± 37.56% of the control, indicating enhanced early osteogenesis. In summary, the MgF 2 -PDA-EGCG coating improves the corrosion resistance and biological properties of AZ31B magnesium alloy, supporting its potential for biomedical implants.
研究领域:
生物材料学
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腐蚀科学
·
医学工程
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Ziwei Lv,Hongxu Liu,Jingxuan Zhao,Ruijia Wang,Ting Xie,Yuchao Qi,Yang Yu,Xue Lv,Shulin Sun
In this paper, PVDF-g-PNIPAAm/GEP-PDA@ZnO composite membranes that can undergo light-induced structural response and photodegradation to achieve self-cleaning have been designed and applied to the separation and purification of dye wastewater. The membranes were prepared by blending graphene (GPE)-polydopamine (PDA)-coated zinc oxide (ZnO) core–shell particles into the PVDF-g-PNIPAAm matrix with a non-solvent induced phase separation technique. The GPE and ZnO are tightly bonded by highly adhesive PDA to form a “strawberry-like” core–shell structure. GPE absorbs light energy and converts it into heat, resulting in changes in PNIPAAm chain segments to expand the pore size for self-cleaning. While the membrane is warming up, GPE further promotes the activation of active groups on the surface of PDA@ZnO at high temperature, resulting in unique and excellent photothermal catalytic activity. As a result, the membrane achieves both self-cleaning and pollutant degradation, which results in an FRR of 99.6% after light cleaning. Moreover, the GPE-PDA@ZnO nanoparticle-modified PVDF-g-PNIPAAm membranes exhibit excellent cycling stability with a degradation flux recovery rate of more than 97% even after multiple UV cleaning. Thus, PVDF-g-PNIPAAm/GPE-PDA@ZnO composite membranes extend the versatility of PVDF-based membranes and show extraordinary potential for application in wastewater treatment.
研究领域:
材料科学
·
环境工程
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Laibo Song,Shujie Zhang,Qimeng Wang,Xiaosui Mao,Bo Liu,Yuan-Di Zhao,Wei Chen
Micro/nanomotors (MNMs) are miniaturized devices capable of autonomous motion and on-demand task execution, which have broad application prospects in environmental remediation and biomedicine. However, miniaturization makes it difficult for chemically driven MNMs to integrate functional parts to perform tasks in a simple way. Here, we present a novel approach to manufacture asymmetric, hollow, modifiable and catalytic micromotors by the interfacial protection of polystyrene (PS) and inherent property of polydopamine (PDA). The hollow PDA microparticle with a single hole on its surface, as the main structure of the micromotors, is fabricated by swelling-induced symmetry breaking. Due to interfacial protection of PS, the functional component platinum nanoparticle (PtNP) can be selectively assembled on the outer or inner of the hollow PDA particle, respectively. Benefiting from the geometric shape and composition characteristics, PtNP-modified PDA motors can perform self-propulsion and catalyze the decomposition of methylene blue (MB) during motion. Moreover, the successful loading of nanoparticles with different functions (AuNP, Fe 3 O 4 and MnO 2 ) enables it to fabricate different functional MNMs as required. In short, the strategy is a versatile, general for designing asymmetric hollow MNMs with adjustable function by virtue of interfacial protection and functionalized PDA.
研究领域:
材料科学
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纳米技术
·
生物医学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2022
·
IF 4.383
Wenlong Li,Ludan Shang,Dafei You,Hao Li,Han Wang,Lijuan Ma,Xinna Wang,Yanwei Li,Yanhui Li
In this paper, we synthesized a core-shell structured Fe 3 O 4 @Ti-PDA nanoparticles as photocatalyst by a facile method in environmental friend mild reaction conditions without organic solvent . Firstly, Fe 3 O 4 was synthesized by solvothermal method, and Fe 3 O 4 @PDA was formed by dopamine (DA) self-polymerization to encapsulate Fe 3 O 4 to form polydopamine (PDA) lager. Then, the surface of Fe 3 O 4 @PDA was wrapped by coordinating bis(2-hydroxypropionic acid) diammonium dihydroxide(Ti-BALDH) with DA combined DA self-polymerizing to obtain Fe 3 O 4 @Ti-PDA. As control, we synthesized another photocatalyst Fe 3 O 4 @PDA@TiO 2 . Compared with Fe 3 O 4 @PDA@TiO 2 (band gap 3.0 eV), Fe 3 O 4 @Ti-PDA had a narrower band gap (2.5 eV) and a wider light absorption range (from ultraviolet to visible light to near-infrared light), as a photocatalyst, which can make full use of sunlight to improve photocatalytic efficiency. Meanwhile, magnetic core of Fe 3 O 4 @Ti-PDA made it was easy to separate from aqueous solution for convenient recovery. Using methylene blue (MB) as model pollutant, the degradation efficiency of Fe 3 O 4 @Ti-PDA on MB reached to 92.4% under visible light irradiation for 120 min without cocatalyst, while for Fe 3 O 4 @PDA@TiO 2 only to 32.5%. The result indicated Fe 3 O 4 @Ti-PDA enabled photocatalytic oxidation and rapid separation when photogenerated electron-hole pairs were generated. After three recycles, the degradation efficiency of Fe 3 O 4 @Ti-PDA on MB still remained at 86.47%, showing good recycle stability.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Xiangyang Zhu,Wenjie Wang,Huifang Xing,Qinling Bi,Li Wang,Meng Rong,Shan Ni,Menglei Yuan,Liangrong Yang,Huizhou Liu
Magnetic nanocomposites provide manifold perspectives for sustainable development. However, the cumbersome operation process and energy consumption after treatment limit its application in the practical industry. Herein, we present a simple and universal strategy to synthesize Fe 3 O 4 @PDA@shell nanoparticles via in-situ homogeneous hydrolysis reaction growth different nanomaterials on the PDA modified Fe 3 O 4 nanospheres , which can avoid multistep repetitive washing, redispersing, and drying. As an example, we introduced the synthesis process of Fe 3 O 4 @PDA@MoS 2 catalyst used for heavy oil hydrocracking in detail. The synthesis processes were significantly simplified and the dispersity and stability of the nanosized MoS 2 were improved due to the copious functional groups and strong adhesion properties of polydopamine. The as-prepared Fe 3 O 4 @PDA@MoS 2 nanoparticle catalysts showed high activity and excellent stability. The viscosity of residue was decreased by 99.8% and the recovery of the catalyst reached 90% under harsh conditions (405 ℃ at 13 MPa H 2 ). We also demonstrate the versatility of this strategy for other shell materials, such as WS 2 , VS 2 , Pd, and Rh components, which is promising for designing multifunctional core−shell−shell materials for various applications.
研究领域:
化学工程
·
纳米材料科学
·
能源催化
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 8
·3487-3492
·
IF 3.288
Guopeng Chen,Guofeng Zhang,Fuchao Yang
Stimuli-responsive materials with appealing interactions can serve as key modules for smart devices and have a broad scope of application. In this study, Fe3O4@PDA@TiO2 microspheres with a core–shell structure were assembled. The hollow microspheres have a mesoporous structure and were characterized by SEM, TEM, XRD, Raman, BET, XPS, UV-vis and TGA analyses. Then, a photoresponsive coating with reversibly switchable wettability was prepared by a simple sieve-deposition method using Fe3O4@PDA@TiO2 powder. In addition, the Fe3O4@PDA@TiO2 coated fiber textile was obtained by a dipping method and was used for oil–water separation due to its underwater superoleophobicity. Finally, it was found that this material with its hollow and mesoporous structure can be used for dye adsorption, while the anatase TiO2 ingredient shows good photocatalysis performance.
研究领域:
材料科学
·
环境科学
·
纳米技术
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2020
·Vol. 7
·期 9
·095012
·
IF 1.929
Menghui Wan,Haodong Zhao,Zhihua Wang,Yanbao Zhao,Lei Sun
In this paper, a convenient method to fabricate flexible and free-standing surface-enhanced Raman scatting (SERS) substrates for direct bacteria detection without aptamer bonding is presented. SiO2 nanofibers were prepared via electrospinning and calcination by using tetraethyl orthosilicate as the precursor. Subsequently, it was coated with polydopamine (PDA) by self-polymerization. Finally, Ag@PDA@SiO2 nanofibrous membranes were obtained through in situ growth of Ag nanoparticles in Tollens' reagents. The as-prepared Ag@PDA@SiO2 composite nanofibrous membranes were characterized by techniques of scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction, energy-dispersive x-ray spectroscopy and thermo gravimetric analysis. The flexibility of the as-prepared nanofibrous membranes were verified simply through manual folding. Small molecule probes of 4-mercaptophenol (4-MPh) and 4-mercaptobenzoic acid (4-MBA) were chosen to investigate the SERS sensitivity of the as-prepared Ag@PDA@SiO2 as free-standing substrates. Furthermore, Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), as typical strains of Gram-negative and Gram-positive bacteria, were performed to directly SERS detection by dropping bacteria suspension onto the fibrous membranes without any previous treatment, such as aptamer combination. In addition, the antimicrobial properties of the as-prepared Ag@PDA@SiO2 electrospinning nanofibrous membranes were tested by inhibition zone and turbidity methods. The results show that Ag nanoparticles with an average diameter of 50 nm are uniformly deposited on the surface of electrospinning nanofibers, and the as-prepared Ag@PDA@SiO2 nanofibrous membranes are flexible. As SERS substrates, it shows a rather high detection limitation of 10−11 mol l−1 for 4-MPh and 4-MBA. More importantly, this substrate can be applied for bacteria label-free SERS detection, i.e., complicated procedures are avoided. Meanwihile, the as-prepared Ag@PDA@SiO2 nanofibrous membranes exhibit excellent antibacterial properties. Thus, it has application prospects in trace bacteria detection and water purification.
研究领域:
材料科学
·
生物医学工程
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Yilin Wu,Wendong Xing,Junzhi Yan,Jiuyun Cui,Faguang Ma,Jia Gao,Jian Lu,Chao Yu,Ming Yan
In spite of the intense efforts in selective separation field, the utilization and preparation of membrane-associated molecularly imprinted membranes with both enhanced rebinding capacities and high permselectivity performance still remain strong challenges. Herein, the bioinspired PDA-modified porous regenerated cellulose membrane (pRCMs) with mineral-coated multilevel structure was first proposed for the preparation of PDA/CaCO 3 -based imprinted nanocomposite membranes (PCIMs), m-cresol was chosen as the template molecule. Importantly, this bioinspired methodology was redeveloped and optimized to obtain abundant and uniformly distributed CaCO 3 nanocomposite on the surfaces of PDA@pRCMs. The as-designed sandwich-like imprinting structure were then constructed on PDA/CaCO 3 -based surfaces by developing a simple sol-gel imprinting process. Attributing to the design of the uniform CaCO 3 /PDA@pRCMs surfaces, amount of m-cresol-imprinted sites and permeation selectivity could be both optimized, it was no surprise that more excellent rebinding capacity (97.4 mg g −1 ), fast adsorption kinetics and high permselectivity coefficients (more than 13) were successfully achieved. Importantly, the whole synthesis process was conducted without complicated procedures and polluting the environment. Finally, the experimental results mentioned above, together with the green synthesis processes strongly demonstrated that our synthesis methodology of PCIMs had great potential for applications in various fields of selective separation, chemical industry, environment, biological medicine and so on.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 81
·期 2
·253-264
·
IF 1.638
Bi Qiuyan,Zhang Chao,Liu Jiandong,Cheng Qi,Xu Shiai
In this study, a positively charged nanofiltration (NF) membrane was prepared by interfacial polymerization for separation of divalent cations, whereby a nanomaterial (modified graphitic carbon nitride (g-C 3 N 4 ) with poly(dopamine), PDA-C 3 N 4 ) was incorporated into the active layer of the NF membrane. PDA-C 3 N 4 sheets were synthesized from g-C 3 N 4 sheets prepared by thermal oxidation of melamine, and the preparation conditions of NF membrane were also optimized. The results show that the roughness of PDA-C 3 N 4 embedded NF membrane decreases, and the hydrophilicity and the permeation increase. The membrane also shows high rejection for divalent cations (Mg 2+ , Ca 2+ , Ba 2+ , Cu 2+ and Zn 2+ ) but low rejection (36.8%) for monovalent cation (Li + ), as well as good fouling resistance performance. The fabricated membrane has the potential for treatment of industrial wastewater.
研究领域:
环境科学
·
材料科学
·
化学工程
·
水处理技术
✓ 已验证
DOI
高影响因子
RADIOCHIMICA ACTA
·
2019
·Vol. 108
·期 3
·195-206
·
IF 1.339
Kun Tian,Shuting Zhuang,Jinling Wu,Jianlong Wang
A two-dimensional lanthanum(III) porous coordination polymer was prepared, characterized and applied as an efficient adsorbent for the removal of uranium from aqueous solution. Lanthanum(III) was the metal center of MOFs, and the deprotonated anions of pyridine-2,6-dicarboxylic acid (H 2 PDA), PDA 2− was the organic ligand, this MOF was name as La-PDA, which was synthesized by hydrothermal reaction method. Scanning electron microscope (SEM), Fourier transform infrared (FTIR), powder X-ray diffraction (PXRD) and thermal gravimetric (TG) analysis were used for characterization, and the results indicated that the La-PDA composites were successfully prepared. Compared with traditional adsorbents of uranium, La-PDA showed excellent adsorption properties. The adsorption capacity was 247.6 mg g −1 at 298 K and pH 4.0. The adsorption equilibrium achieved within 120 min, and the adsorption process was exothermic and spontaneous. The absorption mechanism of La-PDA was also explored, from the XPS spectra, the pyridine-like nitrogen atoms (C=N–C) and carboxyl oxygen atoms (–COO–) contributed to the adsorption of uranium. The results suggested that PDA 2− was a potential ligand of uranium adsorption, La-PDA composites were effective adsorbents for the removal of uranium from aqueous solution.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）