International Journal of Analytical Chemistry
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2019
·
IF 1.682
Xiaotian Zhu,Chang Liu,Jie Liu
A new colorimetric assay for the detection of sulfide anions with high sensitivity and selectivity is reported, utilizing Au-Hg alloy nanorods (Au-HgNRs) as probe. Au-HgNRs were prepared by modifying gold nanorods (AuNRs) with reducing agent and mercury ions. In an aqueous solution with sulfide anions, the formation of mercuric sulfide due to redox reaction between the amalgams and sulfide anions greatly changed the surface chemistry and morphology of the Au-HgNRs, leading to a red shift of the localized surface plasmon resonance (LSPR) absorption peak, accompanied by a change in colorimetric response. A good linear relationship was obtained between the LSPR peak wavelength shift and concentration of sulfide anion in the range of 1 × 10−5−1 × 10−4 mol/L. The selectivity of this method has been investigated by other anions. The colorimetric sensing system successfully detected sulfide in wastewater from leather industry.
研究领域:
分析化学
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环境科学
·
纳米技术
✓ 已验证
DOI
高影响因子
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
·
2019
·Vol. 26
·期 3
·1009-1017
·
IF 2.135
Xinyu Wang,Thomas Andritsch,George Chen,Suvi Virtanen
In nanocomposites, different surface states of nanoparticles can potentially provide different interactions with the base polymer and in turn change the bulk properties. Aluminium nitride (AlN) nanoparticles were surface functionalised with three different silane coupling agents (SCAs) with varying organofunctional and hydrolysable groups. The effects of the filler surface chemistry on the resulting AlN/polypropylene (PP) nanocomposites were examined and compared with an unfilled reference system. It is observed that different organofunctional groups can provide different nucleating effects and the dispersion states of nanoparticles while the hydrolysable group is not the dominant factor. The dielectric spectroscopy results show the hydrolysable group of SCA will also result in a difference of the interphase since the trimethoxy silane treated systems show much higher imaginary permittivity than the triethoxy silane treated systems when the frequency is below 1 Hz. The grafted organofunctional layer on the particle surface can provide a significant improvement of the thermal conductivity of the composite materials, e.g. 15 % improvement in thermal conductivity was observed when adding 10 wt% methacrylate silanes treated nano-AlN into PP, while the untreated counterpart only has 5 % improvement.
研究领域:
高分子化学
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材料科学
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纳米技术
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电介质物理
·
热传导材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Mei-Lin Guo,Fang Wang,Ren-Yi Sun,Chun-Bo Li,Jin-Le Li,Fei Song,Yu-Zhong Wang
Integrating environmental robustness, energy-efficient recoatability and multi-scenario applicability into a single durable coating that can resist the accumulation of liquid, solid, and mold contaminants is critical for the sustainable development of the coatings industry, yet remains a significant challenge. Here, this issue is addressed by developing a novel hydrophilic-hydrophobic conversion strategy to engineer an environmentally robust organic/inorganic hybrid superhydrophobic coating with remarkable anti-soiling properties and pH-induced recoatability. This conversion, achieved through surface chemistry regulation incorporating hydrophobic hydrocarbon chains and aminopropyl functional groups, yields a coating with a high water contact angle (WCA) of 155.4° and a low sliding angle (SA) of 1.3°. Notably, the WCA can reversibly transition to 0° within 15 s under pH adjustment. The wide range of the surface energy variations enables effective recoatability and restores surface wettability in damaged coatings, with an adhesion strength up to 5.34 MPa, allowing for the in-situ reuse of old coatings. The uniform distribution of modified silica nanoparticles within semi-cured epoxy matrix imparts satisfactory environmental durability, allowing the composite coating to retain its superhydrophobicity after enduring various harsh conditions, including 100 cycles of sandpaper abrasion, 70 cycles of tape-peeling, 120 h of water immersion, and 168 h of heat and humidity exposure. Additionally, the coating demonstrates enhanced anti-mold performance, achieving a grade 1 rating. This work introduces a novel design and fabrication method for multifunctional pH-triggered recoatable superhydrophobic coatings with enhanced environmental robustness that significantly extends their lifespan and adaptability.
研究领域:
材料科学
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表面工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Jun Xiu Chen,Agul Bao,Dalai Siqin
In this study, we prepared N/S-codoped porous carbon materials via a one-step doping method using lignin as the carbon source, thiourea as the N and S source, and KOH as the activator. The synthesized material exhibited a rich N content and a certain S content. The important reason the CO2 adsorption characteristic of the carbon materials were investigated by modulating the thiourea proportion and doping temperature. Results indicate that at a thiourea ratio of 1:4 and a doping temperature of 700 °C, the material exhibited an outstanding CO2 adsorption capacity of 3.49 mmol/g. Various characterizations revealed that such a high adsorption capacity is attributed to the combination of a microporous structure and excellent surface chemical properties. The doping of S atoms resulted in the formation of effective active sites, increased the defect density of the material, and promoted the generation of N functional groups, thereby enhancing the efficiency of CO2 adsorption. In addition, the material exhibits high CO2/N2 selectivity and cycling stability. The overall results indicate that lignin-derived N/S-codoped porous carbon can serve as a potential adsorbent for CO2 capture.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2017
·Vol. 4
·期 20
·1700490
·
IF 4.279
Qi-Zhi Zhong,Ming-Han Yi,Yong Du,Ai He,Zhi-Kang Xu,Ling-Shu Wan
Micro/nanostructured surfaces with designable wettability show great promise in many fields. This paper reports a new strategy for fabricating superhydrophobic surfaces with tunable water adhesion force by combining multiscale surface structures and mussel-inspired surface chemistry, which can be used for multiple liquid manipulations. Highly ordered porous films prepared by the breath figure method enable convenient construction of surfaces with honeycomb-patterned or nanosized pincushion-like structures. Multiple liquid manipulations including no-loss transportation of water droplets, water collection, programmable movement of water droplets, and chemical reaction monitoring are demonstrated on the micro/nanostructured surfaces. The proposed method is facile, energy-efficient, and can be conducted for the preparation of superhydrophobic surfaces with high contrast adhesion patterns.
研究领域:
材料科学
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表面工程
·
微流体技术
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2019
·
IF 4.63
Jie Zhu,Mengdi Dou,Mohong Lu,Xu Xiang,Xuejie Ding,Wenxin Liu,Mingshi Li
A wettability-controllable surface on carbon nanotubes (CNTs) was successfully constructed through directly grafting poly( N -isopropylacrylamide) (PNIPAM) from CNT surface (i.e. CNT-PNIPAM) via a facile method. The hybrid was employed as the support to prepare Pd catalyst (i.e. Pd/CNT-PNIPAM) for selective hydrogenation of cinnamaldehyde (CAL). The effects of thermoresponsive surface chemistry on catalytic performance were studied. Results showed that CNT-PNIPAM had the lower critical solution temperature (LCST) at about 37 °C. The hydrophilic surface of CNT-PNIPAM at 25 °C (< LCST) improved the dispersion of Pd nanoparticles on it in catalyst preparation. As-prepared Pd/CNT-PNIPAM then automatically switched its hydrophilic surface to the hydrophobic one at 80 °C (>LCST), which exhibited the good adsorption properties for reactants in the reaction. The high Pd dispersion on Pd/CNT-PNIPAM as well as its good adsorption properties for CAL jointly resulted in an enhanced catalytic activity, meanwhile maintaining the selectivity to cinnamyl alcohol (COL) unchanged in comparison to CNT supported Pd catalyst (Pd/CNT).
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
ANALYST
·
2019
·Vol. 145
·期 4
·1279-1287
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IF 4.019
Min Gao,Pengli An,Honghong Rao,Zhengrong Niu,Xin Xue,Mingyue Luo,Xiuhui Liu,Zhonghua Xue,Xiaoquan Lu
Herein, a simple strategy for constructing activity-controllable nanozymes is proposed based on the glutathione (GSH)-gated surface chemistry of citrate-capped Pt nanoparticles (PtNPs). PtNPs have been shown to have oxidase-like activity that can effectively catalyze the oxidation of 3,3′,5,5′-tertamethylbenzidine (TMB) by O2, resulting in a typical color reaction from colorless to blue. We found that GSH can inhibit the oxidase-like activity of PtNPs as a molecule-gated surface chemistry element, resulting in a dramatic decrease of the oxidation of TMB. The addition of copper ions (Cu2+) could oxidize GSH into glutathione disulfide (GSSG), resulting in the distinct suppression of GSH-modulated PtNP surface chemistry and oxidase-like activity inhibition, which further results in a significant acceleration of TMB oxidation and the obvious recovery of intense blue color. Furthermore, the color-based detection signal associated with the redox of TMB indicator here was found to show good fluorescence and a photothermal effect and exhibit sensitive and selective response toward the proposed molecule-gated surface chemistry and Cu2+ target. On the basis of this phenomenon, we successfully constructed a three-in-one sensor for Cu2+ with a triple signal readout, colorimetric, photothermal (temperature), and fluorescence, depending on the proposed in situ modulation method for PtNP catalysis. The applicability of the three-in-one sensor was also demonstrated by measuring Cu2+ in human serum with a standard addition method, and the results are of satisfactory accuracy as confirmed by ICP-MS measurements.
研究领域:
生物化学
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分析化学
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纳米科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2019
·
IF 5.107
Amaia Lejarazu-Larrañaga,Yan Zhao,Serena Molina,Eloy García-Calvo,Bart Van der Bruggen
In this work, a monovalent selective anion exchange membrane was prepared by a two-step modification process based on mussel inspired surface chemistry and amide condensation reactions . An alternating current electric field was employed to boost the homogeneity and stability of the coating. The membrane surface chemistry was investigated by attenuated total reflectance Fourier transform infrared spectroscopy ; the surface roughness was analysed by atomic force microscopy and the hydrophilicity was evaluated by water contact angle measurement. Desalination experiments were conducted to evaluate the selectivity of the membrane for monovalent anions. The resulting membrane showed enhanced monovalent separation efficiency in comparison with the original membrane (17.33% and 4.90% SO 4 2− /Cl − , respectively). The stability of the coating was successfully evaluated by the application of a reverse electric field in electrodialysis . The resulting membrane acquired an increased resistance to organic fouling. This work shows a facile avenue to obtain a stable monovalent selective anion exchange membrane with enhanced antifouling properties.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2012
·Vol. 22
·期 22
·4732-4740
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IF 10.179
Shoujun Zhu,Junhu Zhang,Shijia Tang,Chunyan Qiao,Lei Wang,Haiyu Wang,Xue Liu,Bo Li,Yunfeng Li,Weili Yu,Xingfeng Wang,Hongchen Sun,Bai Yang
The bandgap in graphene-based materials can be tuned from 0 eV to that of benzene by changing size and/or surface chemistry, making it a rising carbon-based fluorescent material. Here, the surface chemistry of small size graphene (graphene quantum dots, GQDs) is tuned programmably through modification or reduction and green luminescent GQDs are changed to blue luminescent GQDs. Several tools are employed to characterize the composition and morphology of resultants. More importantly, using this system, the luminescence mechanism (the competition between both the defect state emission and intrinsic state emission) is explored in detail. Experiments demonstrate that the chemical structure changes during modification or reduction suppresses non-radiative recombination of localized electron-hole pairs and/or enhances the integrity of surface π electron network. Therefore the intrinsic state emission plays a leading role, as opposed to defect state emission in GQDs. The results of time-resolved measurements are consistent with the suggested PL mechanism. Up-conversion PL of GQDs is successfully applied in near-IR excitation for bioimaging.
研究领域:
材料科学
·
光学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Yuhui Wei,Caiyun Xu,Genghui He,Ruiqing Hua,Zhizhong Xie,Dan Liu,Xi Li,Ruiming Zhang,Haolin Tang,Junsheng Li,Deyu Qu
The influences of pore size, specific surface area, and surface chemistry of carbon material as well as the pH value of electrolyte solution on the electrochemical hydrogen storage performances are investigated. Three types of carbon materials carrying micro-, meso- and macro- pores, respectively, were either commercial available or synthesized through the hard template method. Their electrochemical hydrogen storage behaviors are studied in acidic, neutral, and alkaline solutions. The results indicate that microporous carbon with a high specific surface area has great advantages in hydrogen storage capacity, stability, and cycle performance. Moreover, nitrogen-doped porous carbon can not only improve hydrogen storage capacity but also both rate and hydrogen storage stability. The neutral electrolyte provides a larger voltage window while the alkaline media exhibits positive impacts on the hydrogen storage capacity. At the same time, regardless of the pH value of the electrolytes, the larger the specific surface area of the carbon material, the higher the hydrogen storage capacity.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 39
·期 1
·151-158
·
IF 2.726
Wang Xiaonan,Wang Bohan,Lai Hua,Cheng Zhongjun
R ecently, surfaces with intelligent wetting controllability have aroused increased attention. Endowing the surface with stimuli-responsive surface chemistry and tunable surface microstructure can achieve a surface with smart wetting performances. However, almost all existing surfaces only focused on single surface chemistry or micromorphology, thus to achieve smart multiple wetting regulation is still difficult. Herein, we report a ZnO coated shape memory polymer(SMP) surface, and the surface chemistry and micromorphology can be synergistically regulated. ZnO can provide adjustable surface chemistry under UV irradiation, and SMP can offer tunable micromorphology due to its shape memory effect(SME). Based on the combined effect between the above two features, surface wetting performance can be smartly regulated among multiple states. Moreover, due to the excellent controllability of the surface, the application in directional droplet transportation was also demonstrated. This paper offers a new surface with tunability in both surface chemistry and micromorphology, and given the excellent wetting controllability, the surface is believed to be applied in a lot of fields, such as droplet manipulation, fluidic devices and selective catalysis.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-10
·
IF 16.6
Pan Zhao,Fu Qi-Qi,Wang Mo-Han,Gao Huai-Ling,Dong Liang,Zhou Pu,Cheng Dong-Dong,Chen Ying,Zou Duo-Hong,He Jia-Cai,Feng Xue,Yu Shu-Hong
Nanoparticles-based glues have recently been shown with substantial potential for hydrogel adhesion. Nevertheless, the transformative advance in hydrogel-based application places great challenges on the rapidity, robustness, and universality of achieving hydrogel adhesion, which are rarely accommodated by existing nanoparticles-based glues. Herein, we design a type of nanohesives based on the modulation of hydrogel mechanics and the surface chemical activation of nanoparticles. The nanohesives can form robust hydrogel adhesion in seconds, to the surface of arbitrary engineering solids and biological tissues without any surface pre-treatments. A representative application of hydrogel machine demonstrates the tough and compliant adhesion between dynamic tissues and sensors via nanohesives, guaranteeing accurate and stable blood flow monitoring in vivo. Combined with their biocompatibility and inherent antimicrobial properties, the nanohesives provide a promising strategy in the field of hydrogel based engineering.
研究领域:
材料科学
·
生物医学工程
·
组织工程
✓ 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）