APPLIED SURFACE SCIENCE
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2024
·
IF 6.3
Juan Qiu,Xiang Gao,Guiqiu Li,Kanglu Feng,Kangwei Gongsun,Chunchao Chen,Changming Bu,Houyi Ma
An approach to fabricate protective film on copper substrate utilizing molybdate or tungstate assisted by dithiol was proposed. The fabricated films exhibited double-layer structure. The top layer was an organic layer primarily composed of interconnected dithiol molecules through disulfide bonds originating from the oxidation of molybdate or tungstate. The Cu 2 S bottom-layer formed as a result of the cleavage of C-S bonds subsequent to the adsorption of dithiol molecules onto the copper matrix. The molybdate participated the film via MoO x and MoS x . Although no tungstate species were detected in the film, the oxidizing effect of tungstate facilitated a conversion of dithiol molecules into polymers, resulting in a significantly thicker surface layer. The corrosion protection efficiencies of the films reached 99.7 % and 99.8 %, respectively, attributed to the incorporation of molybdate or tungstate additives. Theoretical calculations provided valuable insights into the process of film formation and elucidated the relationship between film structure and anti-corrosion performance.
研究领域:
材料科学
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电化学
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表面工程
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Fang Wang,Yanni Li,Qian Wang,Yabin Wang
Poly (6-N,N-dibutylamino-1,3,5-triazine-2,4-dithiol) nanofilm (PDB) were prepared by electropolymerization of 6-N,N-dibutylamino-1,3,5-triazine-2,4-dithiol monosodium (DBN) on an aluminum alloy (AA5052) surface. Cyclic voltammetry was used to study the electrochemical polymerization mechanism and the growth process. X-ray photoelectron spectroscopy (XPS) was utilized to identify the structure of PDB. Then, the PDB nanofilm covered surface was silanized in hydrolyzed hexadecyltrimethoxysilane (HDTMS) solution to fabricate the composite polymeric nanofilms (CPDB) by self-assembled technique. The formation mechanism of CPDB was that HDTMS reacted with AA5052 surface which was not adequately covered by PDB nanofilm. The composite polymeric nanofilms were characterized by means of XPS, scanning electron microscope (SEM), contact angle, potentiodynamic polarization and immersion test in 5% NaCl solution. The results showed that CPDB was homogenous, compact, hydrophobic and also had an excellent protection efficiency.
研究领域:
材料科学
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电化学
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表面工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
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2017
·Vol. 5
·期 22
·4121-4127
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IF 4.543
Hansen Yu,Yanan Wang,Haiyang Yang,Kang Peng,Xingyuan Zhang
Injectable self-healing hydrogels have found broad applications in drug delivery, tissue engineering and controlled 3D cell culture. Recently, cyclic disulfides were found to be useful in cross-linking and stabilizing liposomes by disulfide exchange polymerization, benefiting from the enhanced reactivity of the disulfide bonds. Herein, we report an injectable self-healing hydrogel constructed from cross-linked F127 with thermo and pH dual responsivity. The rapid sol–gel transition ability at body temperature allows it to be used as an injectable hydrogel. And the increased reactivity of the disulfides of cyclic dithiolane due to the ring tension makes the hydrogel self-heal under not only alkaline conditions but also neutral or even mildly acidic conditions.
研究领域:
材料科学
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生物材料
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药物递送
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组织工程
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产品关联
DOI
PubMed
高影响因子
TALANTA
·
2024
·
IF 5.6
Linchun Nie,Liushan Jiang,Shuangying Li,Denghao Song,Guangyu Dong,Lutong Bu,Chunmao Chen,Qingxiang Zhou
Present work reported a novel nanozyme g-C 3 N 4 @Cu, N-CDs with excellent peroxidase-like activity obtained by loading Cu and N co-doped carbon dots on g-C 3 N 4 (graphitic carbon nitride). g-C 3 N 4 @Cu, N-CDs can catalyze H 2 O 2 to generate hydroxyl radical •OH, which oxidizes o -phenylenediamine to 2,3-diaminophenazine, which emits orange fluorescence under ultraviolet light irradiation. The experimental results confirmed that 1,4-benzenedithiol (BDT) could inhibit the peroxidase-like activity of g-C 3 N 4 @Cu, N-CDs. Based the principle above, a colorimetric-fluorescence dual-mode sensor for rapidly sensing of BDT was creatively constructed with assisting of a smartphone. The sensor showed excellent linearity over ranges of 0.75–132 μM and 0.33–60.0 μM with detection limits of 0.32 μM and 0.25 μM for colorimetric and fluorescence detection, respectively. Moreover, a smartphone-assisted colorimetric array sensor was constructed to distinguish six sulfur-containing compounds according to the difference in the degree of inhibition of nanozyme activity by different sulfur-containing compounds. The array sensor could distinguish sulfur-containing compounds at low concentration as low as 0.4 μM. The results validated that the designed sensor was a convenient and fast platform, which could be utilized as a reliably portable tool for the efficient and accurate detection of BDT and the discrimination of multiple sulfur compounds in real water samples.
研究领域:
分析化学
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生物传感
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材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Bionic Engineering
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2021
·Vol. 18
·期 4
·887-899
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IF 2.682
Tian Yanling,Feng Jiekai,Cai Zexin,Chao Jiaqi,Zhang Dawei,Cui Yuxiao,Chen Faze
Reckless discharge of industrial wastewater and domestic sewage as well as frequent leakage of crude oil have caused serious environmental problems and posed severe threat to human survival. Various nature inspired superhy-drophobic surfaces have been successfully applied in oily water remediation. However, further improvements are still urgently needed for practical application in terms of facile synthesis process and long-term durability towards harsh environment. Herein, we propose a simple one-step dodecyl mercaptan functionalization method to fabricate Super-hydrophobic-Superoleophilic Copper Mesh (SSCM). The prepared SSCM possesses excellent water repellence and oil affinity, enabling it to successfully separate various oil-water mixtures with high separation efficiency (e.g., > 99% for hexadecane-water mixture). The SSCM retains high separating ability when hot water and strong corrosive aqueous solutions are used to simulate oil-water mixtures, indicating remarkable chemical durability of the dodecyl mercaptan functionalized copper mesh. Additionally, the efficiency can be well maintained during 50 cycles of separation, and the water repellence is even stable after storage in air for 120 days, demonstrating the reusability and long-term stability of the SSCM. Furthermore, the functionalized mesh also shows good mechanical robustness towards abrasion by sandpaper, and oil-water separation efficiency of > 96% can be obtained after 10 cycles of abrasion. The reported one-step dodecyl mercaptan functionalization could be a simple method for increasing the water repellence of copper mesh, and thereby be a great candidate for treating large-scale oily wastewater in harsh environments.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Coatings Technology and Research
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2020
·Vol. 17
·期 4
·1065-1074
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IF 1.815
Liu Zhiqiang,Chen Hongxiang,Hu Gang,Wang Jun,Xin Yufei,Xiang Chuanxi,Zhou Yu
There is a trade-off between water resistance and mechanical properties of the waterborne polyurethane film. Aiming to solve this problem, the waterborne polyurethane-acrylate (WPUBH) was prepared by post-chain extension of dithiol instead of diamine, which could improve the storage stability and reduce the water absorption rate due to the absence of urea groups, and by terminating with hydroxyethyl acrylate, which could reduce the water absorption rate and improve the mechanical properties at the same time deriving from the crosslinking of double bonds after heating. The rate of water absorption for WPUBH-2 film decreased down to 2.87%, and the tensile strength reached 8.5 MPa. The water resistance and the mechanical properties of WPUBH obtained a good balance compared with those of the carboxylate-based waterborne polyurethane-acrylate in the previous reports. They had excellent bonding properties for wood joints, and the tensile shear strength was up to 4.53 MPa.
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
Membranes
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2022
·Vol. 12
·期 12
·1207
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IF 4.562
Xiaoqin Niu,Yuhong Chen,Haobin Hu
It is a great challenge to design and prepare polymeric membranes with excellent permeability and good rejection. In this study, a modifier of gold nanoparticles for crosslinking and self-assembly by 1,6-hexanedithiol is fabricated and used to modify the polyethersulfone membrane as an additive, which forms a uniform porous membrane by liquid–liquid phase conversion technology. The morphology of the membrane is investigated by scanning electron microscopy (SEM), the change of the hydrophilicity of the membrane surface after modification is measured by the contact angle goniometer, and the performance of the fabricated membrane is measured by evaluating the pure water flux and the rejection ratio of bovine serum albumin. The results indicate that the permeability of the modified membrane has a significant improvement. When the mass fraction of the modifying agent is 5 wt%, the water flux of the modified membrane reaches up to 131.6 L m−2h−1, and has a good rejection ratio to bovine serum albumin. In short, this work plays an important role in improving the flux of the membrane and maintaining good separation performance.Keywords:membrane;surface modification;gold nanoparticles;permeability
研究领域:
材料科学
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膜技术
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纳米技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Wenxu Yin,Dong He,Xue Bai,William W. Yu
Two-dimensional layered transition metal dichalcogenides , such as tungsten disulfide (WS 2 ) and molybdenum disulfide (MoS 2 ), have been regarded as promising active materials for capacitive energy storage owing to their large specific surface area and multi-valence state of metals to pseudo-capacitive reactions. Here, WS 2 quantum dots (QDs) with uniform size were synthesized via a simple method and their pseudo-capacitance properties were investigated. The electrochemical performance was further improved by using surface treatment with 1,2-ethanedithiol. A specific capacitance (C F ) of 457 F/g was thus achieved. Simultaneously, the outstanding cycling stability (8000 cycles) and coulombic efficiency of 81% were obtained. The results suggest that WS 2 QDs are an excellent candidate for high performance energy storage devices.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Fengli Li,Wei Guo,Yubing Si,Zhongjun Li,Yongzhu Fu
Organosulfides are a class of promising cathode materials for rechargeable lithium batteries. In order to overcome their disadvantages of solubility and low mass density, we prepare benzene-1,2-dithiolato complexes with metal ions (Sn 4+ and Cu 2+ ) by a facile method, which are designated as Sn-(BDT) 2 and Cu-BDT, respectively. The synthesized compounds are colored solids and insoluble in liquid ether electrolyte. Their mass densities are about 2.0 mg cm −3 , which are much higher than that (1.2 mg cm −3 ) of the starting material 1,2-benzenedithiol. When evaluated in Li half cells, Sn-(BDT) 2 delivers a capacity of 221.2 mAh g −1 rendering a volumetric energy density of 973.2 Wh L −1 . Cu-BDT can deliver a capacity of 234.2 mAh g −1 and its volumetric energy density is 1044.5 Wh L −1 . Both volumetric capacities and energy densities are higher than those of the starting material. In the discharge, the metal ions serve as electron receptors and 1,2-benzenedithiolate holds lithium ions. The separate electron/lithium ion storage process is highly reversible, which is evidenced by the cycling performances of 200 and 500 cycles for the Li/Sn-(BDT) 2 and Li/Cu-BDT cells, respectively. This strategy is promising to overcome the intrinsic disadvantages of organosulfides as cathode materials for lithium batteries.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2017
·
IF 7.504
Changyin Ji,Min Lu,Hua Wu,Xiaoyu Zhang,Xinyu Shen,Xiao Wang,Yu Zhang,Yiding Wang,William W. Yu
The surface organic ligands of the quantum dots (QDs) play important roles in the performance of QD electronic devices. Here, we fabricated low toxic AgIn5S8/ZnS QDs light-emitting diodes (QD-LEDs) and greatly enhanced the device efficiency through surface ligand exchange treatments. The oleic acid-capped QDs were replaced with a shorter ligand 1,2-ethanedithiol, which was proved by the Fourier transform infrared spectrum measurement. The treated QD films became more compact with higher film mobility and shorter film photoluminescence lifetime. The more conductive QD films fabricated LEDs showed an external quantum efficiency over 1.52%.
研究领域:
材料科学
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光电子学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Yabin Wang,Juan He,Mudasir Ahmad,Baoliang Zhang,Mehraj-ud-din Naik,Haijiao Xie,Qiuyu Zhang
Effective bonding interactions between various organo-functional groups and metals can contribute to novel materials or fancy performances. In order to reveal the superiority of triazinedithiolsilanes with di-sulfydryl groups over the conventional mercapto silanes with mono-sulfydryl, and amino silanes with mono-amine, for the first time, the above three silanes have been chemically anchored onto cutting-edge dendritic mesoporous silica nanospheres (DMSNs) for performance comparison. The three composite materials have been designed to serve as not only the adsorbents to remove heavy metal cadmium Cd(II), but also the catalyst-supports to load and disperse metal (noble metal Ag, Pd, and base metal Ni) nanoparticles (NPs). The abilities of triazinedithiol-functionalized DMSNs are far superior to the other two specimens both in Cd(II) capture and metal dispersion, owing to the specific nature of triazinedithiol group. The q e values of triazinedithiol-, mercapto-, and amino-functionalized DMSNs can reach to 1280, 816, 900 mg/g, respectively. Moreover, triazinedithiol-functionalized DMSNs could disperse metal NPs more uniformly that the conventional silane-modified ones. It is expected that triazinedithiolsilane compounds could faultlessly replace conventional mercapto silanes in some practical application fields and would shine brilliantly in the future.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2020
·Vol. 22
·期 24
·13498-13504
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IF 3.43
Chunhui He,Qian Zhang,Tingwei Gao,Chenguang Liu,Zhenyu Chen,Cezhou Zhao,Chun Zhao,Richard J. Nichols,Yannick J. Dappe,Li Yang
The single molecule conductance of hybrid platinum/alkanedithiol/graphene junctions has been investigated with a focus on understanding the influence of employing two very different contact types. We call this an “anti-symmetric” configuration, with the two different contacts here being platinum and graphene, which respectively provide very different electronic coupling to the alkanedithiol bridge. The conductance of these junctions is experimentally investigated by using a non-contact scanning tunneling microscopy (STM) based method called the I(s) technique. These experimental determinations are supported by density functional theory (DFT) calculations. These alkanedithiol bridging molecules conduct electric current through the highest occupied molecular orbital (HOMO), and junctions formed with Pt/graphene electrode pairs are slightly more conductive than those formed with Au/graphene electrodes which we previously investigated. This is consistent with the lower work function of gold than that of platinum. The measured conductance decays exponentially with the length of the molecular bridge with a low tunneling decay constant, which has a similar value for Pt/graphene and Au/graphene electrode pairs, respectively. These new results underline the importance of the coupling asymmetry between the two electrodes, more than the type of the metal electrode itself. Importantly, the tunneling decay constant is much lower than that of alkanedithiols with the symmetrical equivalent, i.e. identical metal electrodes. We attribute this difference to the relatively weak van der Waals coupling at the graphene interface and the strong bond dipole at the Pt–S interface, resulting in a decrease in the potential barrier at the interface.
研究领域:
物理化学
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纳米科技
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材料科学
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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）