INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Donglei Wei,Xiaoxia Liu,Zichen Wu,Hou Chen,Liangjiu Bai,Huawei Yang,Lixia Yang,Wenxiang Wang,Xiaofeng Zhang,Junling Wang
Cellulose-based polymer brush-on-brush composite adsorbent is prepared under simple and mild conditions via a four-step two sequential organophotocatalyzed atom transfer radical polymerization for the efficient removal of Hg(II) from aqueous media. The defined structure of the cellulose-based composites was supported by the characterization results. Influences of solution pH, temperature and adsorbent dosage on the adsorption behavior of the adsorbent were determined by batch experiments. The adsorption performance of the polymer brush composite intermediate was also investigated as a comparison to the final adsorbent to illustrate the significance of the topological surface structure on adsorption efficiency and capacity. Adsorption kinetics, isotherm and mechanism were studied systematically to further clarify the adsorption process. In addition, the adsorbent exhibits good applicability as it can be reused for 5 times without obvious decrease in desorption rate (>90 %), which showed potential utility for preconcentration and recovery of aqueous Hg(II).
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
ACS Catalysis
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2024
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IF 11.3
Mengjie Zhou,Shuo Xu,Wenjie Zhang,Ge Shi,Yanjie He,Xiaoguang Qiao,Xinchang Pang
To provide some insights into the relationship between carbon dots’ optical properties and their photocatalytic ability, a series of silicon-doped carbon dots (SiCDs) featuring varying photoluminescence quantum yields (PLQYs) from 11.2 to 75.6% were synthesized, characterized, and employed in polymerization processes. The as-prepared samples exhibited varied structural and optical attributes and resulted in different reaction rates when utilized as cocatalysts for copper-catalyzed photoinduced atom transfer radical polymerization (photoATRP). Comparing the measured density of states, it was found that band gap reduction enhanced the photocatalytic capability of SiCDs. Besides, a negative correlation between the PLQY and polymerization rate was observed, while the latter saw a positive relationship with the nonradiative recombination rate. Both the doping effect and size effect account for the varied efficiency of photoreducing CuII to CuI complexes by SiCDs, thus resulting in variation in the reaction rate. The selected optimal SiCD was further investigated through kinetic study, on–off, and chain extension experiments to prove its feasibility on the aqueous photoATRP system. Remarkably, the SiCD-photocatalyzed approach exhibited an oxygen-tolerant feature and rapid reaction rate, allowing for 3D fabrication of complex structures with high precision and resolution.
研究领域:
材料科学
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光化学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 32
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IF 1.768
Li-chao Liu,Mang Lu,Zhao-Hui Hou,Guo-Xiang Wang,Chang-An Yang,En-Xiang Liang,Hu Wu,Xian-Lei Li,Yi-Xue Xu
Photo-induced atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) was achieved in poly(ethylene glycol)-400 with nanosized α-Fe 2 O 3 as photoinitiator. Well-defined poly(methyl methacrylate) (PMMA) was synthesized in conjunction with ethyl 2-bromoisobutyrate (EBiB) as ATRP initiator and FeCl 3 ·6H 2 O/Triphenylphosphine (PPh 3 ) as complex catalyst. The photo-induced polymerization of MMA proceeded in a controlled/living fashion. The polymerization followed first-order kinetics. The obtained PMMA had moderately controlled number-average molecular weights in accordance with the theoretical number-average molecular weights, as well as narrow molecular weight distributions ( M w / M n ). In addition, the polymerization could be well controlled by periodic light-on–off processes. The resulting PMMA was characterized by 1 H nuclear magnetic resonance and gel permeation chromatography. The brominated PMMA was used further as macroinitiator in the chain-extension with MMA to verify the living nature of photo-induced ATRP of MMA. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42389.
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
ACS Omega
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2023
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IF 4.1
Yuying Li,Junle Zhang,Yaxuan Shi,Yuancheng Zhang,Ge Shi,Xiaomeng Zhang,Zhe Cui,Peng Fu,Minying Liu,Xiaoguang Qiao,Yanjie He,Yudong Wang,Haitao Zhao,Wenjie Zhang,Xinchang Pang
Traditional transparent polymer nanocomposites combined with functional fluorescent inorganic nanofillers are promising for many advanced optical applications. However, the aggregation of the incorporated functional nanoparticles results in light scattering and will decrease the transparency of nanocomposites, which will restrain the application of the transparent nanocomposites. Herein, a robust synthesis strategy was proposed to modify upconversion nanoparticles (UCNPs) with polymethyl methacrylate (PMMA) to form UCNP@PMMA core@shell nanocomposites though metal-free photoinduced surface-initiated atom transfer radical polymerization (photo–SI–ATRP), and thus, the dispersity of UCNP@PMMA and the interface compatibility between the surface of UCNPs and the bulk PMMA matrix was greatly improved. The obtained PMMA nanocomposites possess high transparency and show strong upconversion photoluminescence properties, which promises great opportunities for application in 3D display and related optoelectronic fields. This strategy could also be applied to fabricate other kinds of functional transparent polymer nanocomposites with inorganic nanoparticles uniformly dispersed.
研究领域:
材料科学
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光学工程
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Xiwen Li,Zuan Yang,Peiran Meng,Shipeng Jiang,Mingyang Sun,Xiaoyu Zhang,Yue Sun
An ultrasensitive electrochemical sensor for phospholipase C (PLC) was developed via dual signal amplification based on metal-free visible-light induced atom transfer radical polymerization (MVL ATRP) and Ag nanoparticles (AgNPs). The environment-friendly MVL ATRP method was used to form aldehyde based polymers on the electrode surface, providing more reaction sites for further silver mirror reaction. In addition, a large number of electrically active AgNPs were obtained through efficient and low-cost silver mirror reaction, which improved the detection signal. Under the optimal conditions, the proposed sensor showed a linear response from 1 mU/L to 10 6 mU/L for PLC with a detection limit of 0.1032 mU/L (S/N = 3). Most importantly, the sensor was successfully applied to detect PLC in non-tumor cells (MCF-10A) and tumor cells (MCF-7, MDA-MB-231). The obtained values had no obvious difference with that determined by commercial ELISA kit. When 0.5–10 U/L standard PLC were added into the above cells extracts, the recovery rate was between 96.1% and 102.9%, and the RSD was less than 4.02%. The results showed that the fabricated PLC sensor had acceptable potential in clinical applications.
研究领域:
分析化学
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生物化学
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纳米技术
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生物医学工程
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产品关联
DOI
高影响因子
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