CARBOHYDRATE POLYMERS
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2024
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IF 10.7
Feiyu Tang,Bin Wang,Jinpeng Li,Jun Xu,Jinsong Zeng,Wenhua Gao,Kefu Chen
Water-soluble silver nanoclusters (AgNCs) as a new type of fluorescent material have attracted much attention for their remarkable optical properties and excellent cytocompatibility. However, it is still challenging to synthesize water-soluble AgNCs with good cytocompatibility and excellent fluorescence. Herein, the dialdehyde nanofibrillated cellulose (DANFC)- reduced water-soluble AgNCs capped by glutathione (GSH) with tunable fluorescence emissions were first reported. The DANFC provides a mild reduction environment and crystal growth system for the coordination between silver ions and GSH compared to conventional methods using strong reducing agents. The AgNCs with intense red fluorescence (R-AgNCs@GSH, size ∼2.24 nm) and green fluorescence (G-AgNCs@GSH, size ∼1.93 nm) were produced by varying the ratios of silver sources and ligands, and could maintain stable fluorescence intensity over 6 months. Moreover, the CCK-8 study demonstrated that the R-AgNCs@GSH and G-AgNCs@GSH reduced by DANFC of excellent cytocompatibility (cell viability >90 %) and enable precise multicolor intracellular imaging of Hela cells in 1 h. This work proposes a novel method to synthesize water-soluble AgNCs with tunable fluorescence emission at room temperature based on the classical silver- mirror reaction (SMR) using DANFC as reducing agent, and the synthesized fluorescent AgNCs have great potential as novel luminescent nanomaterials in biological research.
研究领域:
生物材料学
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细胞生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2021
·
IF 4.759
Yuanyuan Fu,Zhentao Li,Qiaoyan Li,Changjun Hu,Yikun Liu,Wenqi Sun,Zilin Chen
Covalent organic frameworks (COFs), considered as a series of newly emerging porous organic materials, have been widely utilized in separation fields. Herein, a novel COF (TFPB-BD) was first employed as stationary phase for high-efficiency capillary electrochromatographic separation. Benzidine (BD) and 1,3,5-Tris-(4-formylphenyl)benzene (TFPB) were selected as organic linkers and then introduced into the aldehyde group modified capillary for the in situ growth of TFPB-BD onto the capillary inner wall at room temperature. The morphology and formation of TFPB coated capillary column were confirmed by a variety of tools including Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDS). It's interesting that the TFPB globular crystals with nanoscale were uniformly and densely modified on the capillary inner surface. Hence, the prepared column exhibited prominent separation performance for the test analytes including alkylbenzenes, chlorobenzenes and phenolic compounds with high efficiency and high resolution. The maximum column efficiency can reach about 1.8 × 10 5 plates•m −1 . Additionally, the high resolutions of anilines, amino acids and parabens were also achieved on the TFPB modified capillary. The precisions (RSDs) of the retention times of alkylbenzenes of intra-day runs ( n = 3), inter-day runs ( n = 3) and parallel columns ( n = 3) were all less than 2.83%. This innovative COF-based stationary phase gives great promise for the chromatographic separation field.
研究领域:
分析化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
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2024
·
IF 5.3
Xupeng Zhang,Zhiping Xu,Kaiqian Li,Xianghong Li,Shuduan Deng,Ying Liu,Gang Zhu
Wood-based substrates decorated with metal–organic frameworks (MOFs) postcarboxylation have garnered significant attention for CO2 capture. However, the practical applicability of composites synthesized via this method is constrained by modification difficulty, low binding strength, and environmentally unfriendly processes. In this work, we introduce an innovative approach that involves the oxidation of hydroxyl groups on wood cellulose C2 and C3 to aldehyde groups, producing a dialdehyde wood sponge (DWS). Subsequently, Cu-BTC MOFs (HKUST-1) were grown in situ in the 3D framework of the wood sponge through chelation. This strategy enhances the affinity between the MOFs and the wood-derived skeleton, significantly increasing the micropore surface area to 402 m2/g, with the micropores primarily concentrated at 0.71 nm. Benefiting from its high MOF load and abundant microporous structure, HKUST-1/DWS achieved a CO2 capture capacity of 2.34 mmol/g (273 K, 1 bar), remarkably surpassing that of HKUST-1/TWS (carboxylated wood sponge by 2,2,6,6-tetramethylpiperidinooxy), which exhibited a capacity of 1.59 mmol/g. Additionally, the synthesized solid adsorbent demonstrated high CO2/N2 adsorption selectivity (47.95), indicating the potential for efficient CO2 separation. This method of constructing MOF/wood-based CO2 sorbents enables chemical modification and facilitates efficient and sustainable carbon dioxide capture.
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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纳米科技
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能源技术
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DOI
高影响因子
CELLULOSE
·
2016
·Vol. 23
·期 4
·2539-2548
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IF 3.195
He Hui,Hou Xunan,Ma Beibei,Zhuang Linzhou,Li Chuanfa,He Shihong,Chen Shuixia
Viscose fiber was oxidized with sodium periodate to prepare a reactive dialdehyde viscose fiber (DAVF) containing abundant aldehyde groups. A solid amine adsorbent (DAVF-PEI) with high amino density for CO 2 capture was then prepared by modifying DAVF with polyethylenimine (PEI). Response surface methodology (RSM) based on a three-level, three-factorial design was used to optimize the synthesis conditions of DAVF, in which multiple linear regression equations of aldehyde content and fiber mass loss degree were constructed. The well-designed DAVF was then employed as a support to graft with PEI via Schiff base reaction to prepare a solid amine fiber (DAVF-PEI) for CO 2 adsorption. The experimental results verified that DAVF-PEI possessed good thermo-stability and high CO 2 adsorption capacity (4.11 mmol/g). DAVF-PEI also showed promising regeneration performance, which could maintain almost the same adsorption capacity for CO 2 after ten adsorption and desorption recycles.
研究领域:
材料化学
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环境科学
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高分子科学
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化学工程
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吸附分离
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碳捕集技术
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·Vol. 13
·期 6
·120211
·
IF 7.2
Zhen Liu,Wenjing Zhang,Shunjie Hu,Ying Shen,Dawei Li,Feng Liu,Jian Xing
This study successfully fabricated a biomimetic rose-like porous aerogel solar evaporator (NH 2 -MWCNTs@Ald-CMC) by integrating amino-functionalized multi-walled carbon nanotubes (NH 2 -MWCNTs) with aldehyde-modified carboxymethyl cellulose (Ald-CMC) through a Schiff base reaction. The three-dimensional (3D) network architecture of the material effectively addressed salt accumulation challenges through structural design. Inspired by the microstructural features of natural rose petals, a biomimetic design strategy was employed to optimize the hierarchical pore architecture of the aerogel, enabling efficient capture and absorption of the entire solar spectrum. Experimental results demonstrated that the material achieved an average light absorption rate of 98.2 % across the entire solar spectrum. Furthermore, an innovative 3D stacking structural design strategy was proposed, which established continuous capillary water transport pathways and minimized thermal radiation losses. Under standard 1.0 sun illumination, the evaporator attained an evaporation rate of 7.40 kg·m −2 ·h −1 and an evaporation efficiency of 96.84 % for seawater, with the evaporated product fully meeting the drinking water standards set by the World Health Organization (WHO). This study provides a novel design concept for practical applications of solar-driven interfacial evaporation technologies and holds significant practical implications for addressing global freshwater shortages and energy crises.
研究领域:
材料科学
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纳米科技
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可再生能源
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环境工程
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物理化学
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功能材料
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界面蒸发
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产品关联
DOI
高影响因子
Soft Matter
·
2017
·Vol. 13
·期 16
·3003-3012
·
IF 3.889
Cui Cheng,Xiuli Zhang,Yabin Meng,Zhihong Zhang,Jingdi Chen,Qiqing Zhang
Multiresponsive and biocompatible self-healing ε-PL/A-Pul/BPEI hydrogels were prepared in aqueous solution by Schiff base reaction with aldehyded pullulan (A-Pul), ε-poly-L-lysine (ε-PL) and branched polyethyleneimine (BPEI) as materials. The imine bonds were rapidly cross-linked into a hydrogel network within 80 s. Scanning electron microscopy images showed that the hydrogels exhibited a cross-linked structure with the average pore size from 58 to 82 μm. Rheology tests indicated that the hydrogels maintained good mechanical properties. Water contact angles and swelling studies suggested that the hydrogels could swell in water, with a max swell ratio of 1559%, and pH and temperature had an influence on the equilibrium swelling ratio. The hydrogels could be injected either before or after gelation, and they displayed a self-healing process in ddH2O at room temperature based on the dynamic uncoupling and recoupling of the imine bonds. The MTT assays implied that the hydrogels were non-cytotoxic on mice bone marrow mesenchymal stem cells. Therefore, the hydrogels showed potential application in biomedical fields, and consequently further work was performed using the self-healing hydrogels as drug carriers in in vitro/vivo antitumor studies.
研究领域:
材料科学
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生物医学工程
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药剂学
✓ 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）