Jove-Journal of Visualized Experiments
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2018
·
IF 1.184
Xinglong Wang,Xuesong Wu,Jiating He,Xiaolin Tao,Hongyan Li,Gui Zhao,Yawen Wang,Hongyu Chen
Advancing synthetic capabilities is important for the development of nanoscience and nanotechnology. The synthesis of nanowires has always been a challenge, as it requires asymmetric growth of symmetric crystals. Here, we report a distinctive synthesis of substrate-bound Au nanowires. This template-free synthesis employs thiolated ligands and substrate adsorption to achieve the continuous asymmetric deposition of Au in solution at ambient conditions. The thiolated ligand prevented the Au deposition on the exposed surface of the seeds, so the Au deposition only occurs at the interface between the Au seeds and the substrate. The side of the newly deposited Au nanowires is immediately covered with the thiolated ligand, while the bottom facing the substrate remains ligand-free and active for the next round of Au deposition. We further demonstrate that this Au nanowire growth can be induced on various substrates, and different thiolated ligands can be used to regulate the surface chemistry of the nanowires. The diameter of the nanowires can also be controlled with mixed ligands, in which another "bad" ligand could turn on the lateral growth. With the understanding of the mechanism, Au nanowire-based nanostructures can be designed and synthesized.
研究领域:
纳米科学
·
材料化学
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 10
·4043-4051
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IF 4.569
Yiming Wang,Xu Zhu,Xinyue Zhang,Jianwei Zheng,Hong Li,Nianyi Xie,Ying Guo,Hong-bin Sun,Gang Zhang
The treatment of mercury pollutants in water has been wide concern. Adsorption is a promising method for mercury removal that has been extensively studied. Nevertheless, the secondary application of the immobilized Hg is seldom investigated. In this paper, the Hg adsorption behavior of UiO-66 bearing sulfhydryl groups is studied. The research shows that the porous structure and sulfhydryl groups of UiO-66-SH can effectively promote the removal of mercury from water. In addition, this work also pushes forward the sequential application of the recovered adsorbent, which contains the adsorbed mercury that may cause secondary pollution. The recovered waste adsorbent, UiO-66-S-Hg, was successfully used as an efficient catalyst for transfer vinylation, which produces value-added products, vinyl benzoates. Eight vinyl esters have been successfully synthesized with a yield of up to 89%. This methodology provides a promising way for not only the treatment of mercury contamination, but also secondary pollution protection and the resource utilization of immobilized Hg.
研究领域:
环境科学
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材料科学
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催化化学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Xueping Chen,Wenqing Wang,Yulin Song,Yongquan Zhou,Hao Li,Jianming Pan
Hemoperfusion is a powerful and yet simple method for lead poisoning treatment, but creation of safe and effective sorbents with excellent selectivity remains a real challenge. To address this, we here construct 2D nanosheet sorbents (BM-SH) through metastable emulsion droplets and subsequent two-step grafting polymerization for efficient blood lead removal in vitro. Metastable emulsion droplets endow typical nanosized sheet-like structure (thickness of 30 nm) and relatively round shape. The consecutive two grafting processes using hydroxyethyl methacrylate (HEMA) and L -cysteine monomer (D-SH) provide BM-SH with a high density of accessible binding sites towards lead ions (Pb 2+ ). A high adsorption capacity of 390.5 mg g −1 and quick capture 97.35 % of Pb 2+ within initial 10 min are obtained, surpassing most of the reported sorbents for lead removal. Besides, adsorption distribution coefficient ( K d ) of BM-SH among four coexisting metal ions achieved 7792 mL g −1 , showing outstanding selectivity toward Pb 2+ . Importantly, a possible adsorption mechanism is recognized as coordination with carboxyl, sulfydryl and imino groups from L -cysteine, and mercapto ligand as the key chelating agent may be the reason for high Pb 2+ affinity. And what’s more, BM-SH displays good hemocompatibility and high efficiency of blood lead removal rate (above 86 % in vitro).
研究领域:
生物医学工程
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环境科学
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材料科学
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DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2019
·Vol. 304
·期 6
·1800790
·
IF 3.038
Lanfang Liu,Jianquan Luo,Yinhua Wan,Xiangrong Chen,Yuanpeng Wu
Mussel-inspired membrane adsorber with thiol ligand (SH-membrane adsorber) is prepared by polydopamine-assisted poly(ethylene imine) grafting and subsequent thiolation modification for efficient removal of patulin. The effects of temperature, contact time, pH, and initial patulin concentration on the adsorption capacity of the membrane adsorber are investigated. The results show that the SH-membrane adsorber is effective to remove patulin. The adsorption capacity of the membrane can reach 1245.11 µg g −1 for patulin. In static adsorption tests, the adsorption kinetic and equilibrium data are well fitted by the pseudo-second-order kinetic model and Freundlich isotherm model, respectively, meaning that the adsorption process is a multilayer chemical adsorption. The SH-membrane adsorber can be recovered by l -cysteine, and the removal efficiency of patulin is maintained at about 89.23% after eight reuse cycles, compared to the 17.33% of control membrane. These results demonstrate that the SH-membrane adsorber has a potential application for patulin removal.
研究领域:
食品科学
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环境工程
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生物化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
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2021
·Vol. 9
·期 28
·5682-5690
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IF 6.331
Kangqiang Liang,Shaohua Qu,Yixiao Li,Li-li Tan,Li Shang
Molybdenum disulfide quantum dots (MoS2 QDs) have drawn increasing attention owing to their distinct optical properties and potential applications in many fields such as biosensing, photocatalysis and cell imaging. Elucidating the relationship between the surface chemistry of MoS2 QDs and their optical properties as well as biological behaviors is critical for their practical applications, which remain largely unclear. Herein, by adopting a sulfur vacancy modification strategy, a toolbox of MoS2 QDs functionalized with different thiolate ligands was prepared. The effect of surface chemistry on the optical properties of MoS2 QDs was systematically explored by various spectroscopic techniques, revealing the important role of surface ligands in defining their absorption band gap and luminescence quantum yield. Furthermore, cellular experiments showed that the cytotoxicity and intracellular fate (i.e., lysosomal accumulation) of MoS2 QDs are closely related to the properties of surface ligands. Our results underscore the important roles of surface ligands in regulating the properties and biological interactions of these QDs, which will facilitate the future development of MoS2-based materials with precisely controlled functions for biomedical applications.
研究领域:
纳米技术
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材料科学
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生物医学工程
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细胞生物学
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2021
·Vol. 45
·期 42
·19957-19962
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IF 3.591
Yan Xu,Xiao-Sheng Yan,Si-Bo Zhang,Shao-Wei Li,Ning-Shao Xia,Tao Jiang,Zhao Li,Yun-Bao Jiang
We report a supramolecular nanosphere with a diameter of 8.65 nm built in an aqueous solution via dynamic binding of glucose to a thiol ligand bearing a phenylboronic acid group, 4-mercaptophenylboronic acid (4-MPBA), as a hydrophilic component in combination with a hydrophobic thiol ligand, 1-octanethiol (n-C8H17SH), in the presence of Ag+. Highly hydrophilic glucose binding to two neighboring boronic acid groups from 4-MPBA ligands on their Ag+ coordination polymeric backbone, on which the hydrophobic n-C8H17SH ligands locate inwards, drives the coordination polymers into nanospheres. The supramolecular nanospheres are of small diameters with narrow size distribution characteristic of glucose among the tested monosaccharides including fructose and xylose.
研究领域:
材料科学
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化学
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纳米技术
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超分子化学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Wei Jiang,Qiang Xu,Xionghui Wei
It is first reported herein that cobalt(II) complexes solution of monothiol-containing multidentate ligands are used to remove low concentration of nitric oxide (NO). These chelating ligands are water-soluble amines, alcohols or acids which containing at least one -SH group, include those of cysteine, mercaptosuccinic acid, mercaptoethanesulfonate, mercaptopropionic acid and the like. These -SH compounds when coordinated with cobalt ions, forming complexes are very effective for NO removal. The results indicate that the side group (methyl, carboxyl, carboxymethyl) on α-carbon atom of ligands contribute to the denitration of the chelate solution, whereas the substituents on sulfur atom of ligands deactivate the complexation system. In addition, we have found that several monothiol compounds with simple molecule structure and low cost exhibit good performance in denitration, and some of cobalt thiol complexes are more valuable in removing NO than ferrous thiol complexes.
研究领域:
化学
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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
危险品化学品经营许可证（带存储）