COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yuxin Li,Yiqing Chen,Ping Li,Gen Wang,Jing Wei
The deposition of silver nanoparticles (Ag NPs) on different substrates is promising in antibacterial applications. But it is limited by the aggregation problem and complex deposition procedure of Ag NPs. Herein, facile fabrication of antibacterial substrates with controllable deposition of Ag NPs via polyphenol reduction strategy is presented. Polyphenol with surface independent coating property is used to in situ deposit Ag NPs on diverse substrates (e.g., cotton textile, copper foil, steel sheet, iron sheet, glass slide, rubber and plastic sheet) via the reduction of Ag + . The modified substrate shows several unique properties, including high color maintenance (4.7 % change from the original), sustained and pH-responsive Ag + release behavior (about 40–10 % of Ag + ions at pH values of 4–8 at day 9, respectively), large diameters of inhibition zones (over 1 cm) and low minimum inhibitory concentrations (0.1 mg mL –1 ). The continuous contamination tests (5 cycles with the almost same effectiveness) and long-term stability analysis (over 25 days) manifest excellent recycling performance and stable antibacterial benefits. Finally, the results of practical applications on mask, shoe-pad and fresh box materials show that all the modified materials inhibited E. coli and S. aureus by more than 95 %. This work provides a versatile interfacial polyphenol reduction strategy for depositing Ag nanoparticles on various substrates. Such Ag-deposited product could be used for packaging and clothing sanitation.
研究领域:
材料科学
·
生物学
·
医学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yi-Fang Mi,Jia-Li Liu,Fei Jiang,Meng Yang,Zhi-Hai Cao
Porous organic polymers (POPs) have been regarded as potential candidates for high-performance membrane building blocks ascribed to their robust structure, tunable pore size, and high surface area. Normally, the POPs membrane possesses a POPs selective layer on the porous substrate for its real application. Numerous efforts have been paid to manipulate the POPs selective layer to enhance the separation performance, however, except from providing mechanical strength, the role of substrates in the formation and separation performance of POPs membrane receives less attention. In this work, we employed a systematic study to reveal the role of substrates in the governing POPs membrane formation by choosing substrates with diverse properties. The relationship between the properties of substrate (e.g., pore size, porosity, roughness, hydrophilicity, and surface functional groups) and the assembly structure of POPs membranes was in-detail analyzed. We found that the hydrolyzed polyacrylonitrile substrate induced a better assembly of POPs nanoparticles. Its rough surface and carboxylic functional groups created Van der Waals interactions and hydrogen bonding interactions to reinforce interfacial adhesion between the substrate and POPs selective layer, which facilitated the formation of intact and defect-free POPs membranes. The resulting POPs membrane displayed a high water permeance of 121.3 L m -2 h −1 bar −1 with a congo red rejection of 98.9 %. Moreover, benefiting from the robust interfacial interactions between POPs selective layer and the substrate, the POPs membrane enabled itself to maintain structure stability under harsh environments, such as acidic, alkaline, and organic solvents. This work gives new insights to producing robust and high-performance POPs membranes.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2018
·Vol. 22
·期 12
·3947-3954
·
IF 2.509
Du Hai Yan,Liu Xiao Xiao,Ren Zhe,Liu Pan Pan
Poly(3,4-ethylenedioxythiophene) (PEDOT) has been electrochemically deposited on carbon paper (CP), stainless steel mesh (SSM), stainless steel (SS), and indium tin oxide (ITO) by unipolar-pulsed method. The surface morphology, micro-structure, and electrochemical capacitance for PEDOT/substrates were characterized by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR), and electrochemical techniques. The electrochemical capacity measurements of the PEDOT/CP electrode in 0.5 M H 2 SO 4 shows high mass-specific capacitance of 126.24 F/g at a 1 mA/cm 2 , which is consistent with the specific capacitance of 126.75 F/g at 5 mV/s. Compared with PEDOT/SSM, PEDOT/SS, and PEDOT/ITO, PEDOT/CP electrode shows better capacitive performance, which presents good rate performance of 76.78% at 5 mA/cm 2 and charge-discharge stability with the capacitance retention rate of 80.57% for 5000 cycles. SEM result shows PEDOT maintained the spindle-like structure along with the threads of each carbon fiber, which are densely packed and randomly oriented forming the porous structure.
研究领域:
材料科学
·
电化学
·
能源存储
·
表面工程
·
导电聚合物
✓ 已验证
DOI
高影响因子
Silicon
·
2019
·Vol. 11
·期 3
·1261-1266
·
IF 1.21
Guo Ruibin,Qi Lei,Mo Zunli,Zhang Hongjuan,Feng Hangkong,Yang Shengrong
In this work, two different methods were applied to prepare SiO 2 -Graphene composite materials (SiO 2 -G). One way to synthesize composite materials was stirred carboxyl functionalized graphene and tetraethyl ortho silicate (TEOS) together at low temperature. In other way, SiO 2 -G were obtained via an one-pot hydrothermal reaction. We employed SEM to characterize the direct structure and morphology information of materials, subsequently. It could be clearly observed that their morphology were greatly affected by the different preparation methods and resulted in a tremendous change occurred. It is no question that the as-prepared materials with different structure can be used as different substrate materials.
研究领域:
材料科学
·
纳米科技
·
复合材料
·
表面化学
·
功能材料
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Zhenli Sun,Yiyan Zhang,Zijin Hong,Jingjing Du
Surface-enhanced Raman spectroscopy (SERS) has emerged as a powerful analytical tool for dye monitoring in environmental waters; however, challenges remain in resolving complex mixtures due to spectral overlap and limited signal reproducibility. To address this issue, a dual-channel SERS system integrated with machine learning (ML) was developed. Positively and negatively charged polyelectrolyte-modified Fe 3 O 4 @SiO 2 -Au substrates were employed for the selective detection of anionic and cationic dyes, respectively. Benefiting from the magnetic properties of the substrates, the system enables simultaneous and efficient capture of charge-contrasting dye mixtures. Several classification ML models, including linear discriminant analysis (LDA), k-nearest neighbor (KNN), and decision tree, were constructed to distinguish SERS data from various mixed dyes. The best-performing models, LDA and KNN, achieved classification accuracies exceeding 92 %, and a multimodel ensemble algorithm combining LDA and KNN was designed to harness the strengths of both models, resulting in a classification accuracy of 98 % for mixed dyes. This integrated approach enhances the efficiency and precision of Raman spectroscopic analysis while reducing the need for manual intervention, offering strong potential for high-precision pollutant detection and real-world application in analytical chemistry.
研究领域:
分析化学
·
光谱学
·
环境监测
·
机器学习
·
纳米技术
✓ 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）