RSC Advances
·
2015
·Vol. 5
·期 65
·52369-52381
·
IF 3.84
Zhanchao Liu,Zhaoyong Hu,Yan Liu,Minjia Meng,Liang Ni,Xiangguo Meng,Guoxing Zhong,Fangfang Liu,Yanmin Gao
Utilising a general protocol for making surface-imprinted core–shell microparticles via a RAFT-mediated approach, we developed a Cu(II) imprinted polymer with a novel magnetic nanosphere, γ-Fe2O3@meso-SiO2, as support. Attributed to the controlled/living polymerization mechanism of the RAFT polymerization process, the Cu(II) imprinted polymer prepared by RAFT polymerization (IIP-RAFT) presented a more well-defined morphology, more mono-dispersed properties, and much higher magnetic responsiveness, compared to the Cu(II) imprinted polymer prepared by traditional free-radical polymerization (IIP-TP). Moreover, in the static saturation binding experiments, a higher binding capacity of IIP-RAFT (210 mg g−1) than IIP-TP (145 mg g−1) was also found. Afterwards, a series of adsorption experiments were carried out to systematically evaluate the adsorption performance of the as-prepared IIP-RAFT. And the results showed that IIP-RAFT exhibited excellent selectivity, good reusability and desirable dynamic adsorption behavior, and could be an ideal candidate for SPE sorbents for the removal of Cu(II) in real wastewater.
研究领域:
材料科学
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环境科学
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分析化学
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DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Jianming Wu,Xi Cheng,Yulin Li,Guisheng Yang
In this study, Fe 3 O 4 -nanoparticles-contained polyamide 6 (PA 6) microparticles (FP) were developed by a first dispersion of Fe 3 O 4 -nanoparticles in ε-caprolactam (CL) monomer in the presence of polystyrene (PS) and a subsequent in situ CL open polymerization into PA 6, followed by PS removal. The FP microparticles (as magnetic separation material) and nanochitin (n-CT, as an effective metal-cation natural adsorbent) were then in situ encapsulated into poly(vinyl alcohol)-enhanced chitosan hybrids (PVA/CTS) to form biodegradable nanocomposite hydrogels (FPCC) with magnetic separation ability. The FPCC hybridized hydrogels enabled about 1.7-fold Cu(II) adsorption capacity as compared to the pure PVA/CTS hydrogels with a Cu(II) adsorption value of 38.7 mg/g. More attractively, the adsorption equilibrium could be achieved within 10 min, which is quicker than many previous adsorbents. Furthermore, simulation results indicated that Cu(II) adsorption behaviors of the hybrid hydrogels conform to a pseudo-second-order kinetic model and a Langmuir isotherm model.
研究领域:
材料科学
·
环境工程
·
纳米技术
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化学工程
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 73
·69370-69380
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IF 3.289
Juncai Zhang,Youning Chen
With chloromethylated polystyrene resin being the base material, a new type of salicylic acid-type chelating resin with high capacity was prepared by grafting glycidyl methacrylate (GMA) on the surface of the resin via surface-initiated atom transfer radical polymerization and followed by the derivatization with 5-aminosalicylic acid. Fourier-transform infrared spectrometry and X-ray photoelectron spectroscopy were used to characterize the surface composition of the resin. It was found that the grafting degree of GMA increased linearly with the extension of ATRP time and GMA concentration. The maximum adsorption capacities of the resin were up to 4.23 mmol g−1 for Fe(III), 4.02 mmol g−1 for Ag(I), 2.36 mmol g−1 for Ni(II) and 1.75 mmol g−1 for Cu(II) at pH 4.0, respectively. The adsorption kinetics of the four metal ions conform to the model of pseudo second-order kinetics, and adsorption equilibria were better characterized by the Langmuir equation. Thermodynamic parameters were calculated to understand the nature of the adsorption process. The resin possesses excellent desorption rate and reusability. All these results indicate that the resin could be potentially applied to the efficient removal of heavy metal ions from waste water.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Ruilu Yang,Qi Zhang,Jian Shi,Yaping Zheng,Dechao Wang,Jian Zhang,Siyuan Liu,Zhuting Fu
The first example of a magnetic loading functional porous liquid (PL) by employing hollow silicon dioxide (HS) loaded with Fe 3 O 4 as the porous guest, (3-glycidyloxypropyl) trimethoxysilane (KH560) and polyetheramine M2070 as hindered sterically solvents was demonstrated in this paper. This nanoadsorbent (Fe 3 O 4 @HS-PL) was prepared for the decontamination of aqueous solutions from Cu(II) and Pb(II) heavy metals. The hindered sterically solvents ( i.e. , the flexible oligomer chains) endow the Fe 3 O 4 @HS porous guest with a superior flowing behavior at ambient temperature. Various approaches were applied to confirm the morphology, structure and properties of the resultant Fe 3 O 4 @HS-PL. More significantly, the adsorption behavior of Cu(II) and Pb(II) in aqueous solution by Fe 3 O 4 @HS-PL was studied in detail. As expected, combined with the cavity structure from porous guest and amine groups from flexible organic flow layer, Fe 3 O 4 @HS-PL exhibited excellent adsorption capacities of 322.58 and 357.14 mg·g −1 for Cu(II) and Pb(II), respectively, at 298 K, pH 8 and initial concentration of 20 mg·L -1 . The obtained HS and Fe 3 O 4 in Fe 3 O 4 @HS-PL magnetic nanoadsorbent presented average particles size ascertained to be ca. 200 nm and 30 nm, respectively. Moreover, the Freundlich model and pseudo-first-order model has described the adsorption process and adsorption kinetics . The parameters in thermodynamic experiment signified the spontaneity and endothermic properties of the adsorption. Moreover, magnetic loading endowed the Fe 3 O 4 @HS-PL with a superior regeneration performance. A variety of mechanisms containing coordination interaction, porous guest absorption, electrostatic interaction , steric effect and entropy are simultaneously realized in this novel adsorption system. Therefore, the introduction of PLs adsorbents into heavy metal adsorption systems through the construction of PLs materials by magnetic loading and surface amination is of great significance in the field of heavy metal adsorption, eventually starting a new time of pushing forward the development of novel adsorbents for decontamination of aqueous solutions from heavy metal ions.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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产品关联
DOI
高影响因子
Science of Advanced Materials
·
2022
·Vol. 14
·期 8
·1410-1418
·
IF 1.067
Xin Jia-Ying,Li Yue,Liu Feng-Yuan,Sun Li-Rui,Wang Yan,Xia Chun-Gu
Cu(II) adulteration in preserved vegetables by unreliable producers to increase their visual appeal or compensate for natural colour changes is most common. Methanobactin (Mb) is a Cu(II)-coordinated peptide, which plays crucial role in Cu(II) capture and absorption and the catalysis
of Cu(II)-containing methane monooxygenase in methanotrophs. In this study, Mb-functionalized gold nanoparticles (Mb-AuNPs) was applied to develop a dual readout colorimetric detection for Cu(II) adulteration in preserved vegetables. In the presence of Cu(II), Mb-AuNPs was assembled into nanocluster
driven by Cu(II)/Mb coordination, and the assembly process was monitored by the visible spectrum on the variation of surface plasmon resonance peak. The results showed that, Mb-AuNPs possessed excellent peroxidase-like activity after Cu(II) coordination. In the presence of Mb-AuNPs, the amount
of Cu(II) obviously affected the rate of hydroquinone oxidation by H2O2 and the change of A246. The visible and ultraviolet dual-readout detection system containing Mb-AuNPs, hydroquinone and H2O2 exhibited high sensitivity and selectivity
for Cu(II). The linear range of visible and UV detection towards Cu(II) was 0.05–0.4 μmol/L, the limit of detection were 37.50 nmol/L and 4.48 nmol/L, respectively. In conclusion, the Cu(II) coordination driven Mb-AuNPs assembly makes it able to detect Cu(II) adulteration in
preserved vegetables by dual channel methods to eliminate the occurrence of false positives and improve the accuracy of measurement results. Such non-spatially separated Mb-AuNPs assembly and it catalyzed hydroquinone oxidation dual channel readout was simple, fast, reliable and significantly
facilitated the detection efficiency of Cu(II).
研究领域:
分析化学
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纳米技术
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食品安全
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环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Tianguang Wang,Jinsong Zeng,Pengfei Li,Fugang Hu
Hydrogels can effectively address various adsorption requirements as a multifunctional adsorbent material with a three-dimensional spatial network. However, conventional hydrogels, typically synthesized using the one-pot method, often exhibit a heterogeneous internal structural arrangement, leading to non-uniform stress distribution when interacting with heavy metal ions. This has resulted in the structural disruption of conventional hydrogels in the adsorption of heavy metal ions, and they exhibit low adsorption performance, low cycling performance, and non-selective adsorption. Herein, a preassembled framework structure hydrogel (Cu 2+ -CNF hydrogel) was developed by introducing template ions (Cu 2+ ), which have been coordinated with monomers (Acrylic acid and Acrylamide), into a network of cellulose nanofibrils (CNFs) polymers. The obtained Cu 2+ -CNF hydrogel exhibited excellent adsorption properties(Cu 2+ -CNF hydrogel, 402 mg/g) compared to those prepared by the one-pot method(CNF hydrogel, 129 mg/g). In addition, the Cu 2+ -CNF hydrogel has superior selective adsorption property and tensile strain properties (CNF hydrogel: 20 % to Cu 2+ -CNF hydrogel: 100 %) at higher swelling ratios (CNF hydrogel: 2313 wt% to Cu 2+ -CNF hydrogel: 8379 wt%). Even after multiple folding or repeated adsorption–desorption cycles, the integrity of the structure and adsorption function can still be maintained. This work provides a general strategy for preparing a new type of nanocellulose hydrogel.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2017
·Vol. 184
·期 7
·2325-2331
·
IF 4.58
Huang Xinan,Jiang Hong,Li Yongxin,Sang Lijia,Zhou Huipeng,Shahzad Sohail Anjum,Ibupoto Zafar Hussain,Yu Cong
A sensitive and selective luminescent nanoprobe (referred to as DEPN) is designed for the determination of Cu(II) ions. DEPN shows two emission peaks, one at 602 nm and caused by [Ru(bpy) 3 ] 2+ , the other (peaking at 500 nm) caused by silver nanoclusters (AgNCs). The luminescence of the ruthenium complex is inert and acts as the internal reference signal, while that of the AgNCs is quenched by Cu(II) ions. Under 350 nm photoexcitation, a linear relationship is found between the ratio of emission intensity (I 500 /I 602 ) and the concentration of Cu(II) ions in the 0.1–16 μM range. The detection limit of Cu(II) ions is estimated to be 50 nM. The DEPN was applied to the determination of Cu(II) ions in (spiked) water samples, and to intracellular imaging of Cu(II) in HeLa cells using confocal fluorescence microscopy.
Schematic presentation of a dual-emission photoluminescence nanoprobe for selective Cu 2+ sensing. The emission of the Ag nanoclusters (at 500 nm) is quenched by Cu 2+ , while that of the Ru(bpy) 3
2+ -doped silica nanoparticles (at 602 nm) remains unchanged and serves as a reference.
研究领域:
纳米技术
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分析化学
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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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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Dandan Hu,Tianyu Zhan,Zhiyong Guo,Sui Wang,Yufang Hu
A novel dual-modality readout biosensing method is developed for Cu(II), coenzyme (CoA) and histone acetyltransferase (HAT) analysis based on an electrosynthesized tris(bipyridine)ruthenium(II)-functionalized metal-organic framework (Ru-MOF). In this protocol, the Ru-MOF with a delicate structure serves as both an electrochemiluminescent (ECL) and fluorescent (FL) probe. Interestingly, Cu(II) can hinder the two distinct processes favorably, thus realizing bidirectional detection of Cu(II) via an “on-off” method. Simultaneously, CoA, which contains a sulfhydryl group, can ignite a reverse “off-on” process due to the polymeric interaction of CoA and Cu(II) (2: 1). Similarly, abundant CoA molecules could also be generated regularly by a typical HAT p300-driven acetylation reaction, hence accomplishing HAT p300 activity analysis. Subsequently, an ingenious “on-off” route is exhibited again by the introduction of some small molecules (including anacardic acid and C646), which present an inhibiting effect on HAT p300 activity. Furthermore, quantitative analysis of Cu(II), CoA and HAT p300 (ECL/FL) is achieved brightly with detection limits of 0.19/0.76 nM, 1.3/6.5 nM and 1.5/8.8 nM, respectively. Ultimately, this two-channel biosensor with excellent analytical performance is applied successfully in real samples, demonstrating its potential use in bioanalysis.
研究领域:
分析化学
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生物化学
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分子生物学
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DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Liuting Mo,Yi Tan,Yulin Shen,Shifeng Zhang
Cellulose-based aerogels have considerable potential for various application due to renewable, low cost, and high availability. However, mechanical robustness and functionalization remain major challenges. Here, we synthesized a compressible, recoverable cellulose nanofiber (CNF)/carboxymethyl cellulose (CMC)/branched polyethyleneimine (BPEI) aerogel via electrostatic-modulated interfacial covalent crosslinking and freeze-drying process. The porous BPEI@CNF/CMC aerogel possessed excellent mechanical compression and high-density metal-chelating groups, which exhibited fast adsorption kinetics and high adsorption capacity (452.49 mg g −1 ) in static copper adsorption process. Furthermore, BPEI@CNF/CMC aerogels displayed excellent recyclability and could still reach 85% after 10 cycles. The integrated analyses of ATR-FTIR and XPS suggested that the predominant adsorption mechanism included electrostatic interaction, ion-exchange and chelation. This strategy provides a sustainable route to fabricate efficient biomass-based adsorbents for selective copper removal from water.
研究领域:
材料科学
·
环境工程
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Ning Xia,Dehua Deng,Suling Yang,Yuanqiang Hao,Luyan Wang,Yuwei Liu,Cuixia An,Qiuyang Han,Lin Liu
This work reported that protease can be used as the signal label to amplify the signal of electrochemical immunosensors. Carbon nanotube (CNT) was used as the carrier of recognition antibody and signal label. The nanolabel was captured by sensor electrode via a sandwich-type immunoreaction. Protease on the surface of nanolabel can catalyze the hydrolysis of peptide substrate to liberate an amino terminal Cu(II)- and Ni(II)-binding (ATCUN) peptide. The released ATCUN peptide can bind with Cu(II) to generate an electrocatalyst which exhibits high electrocatalytic ability for water oxidation. Thus, the signal was amplified again by the redox cycling between ATCUN-Cu(II) and H 2 O. The immunosensor exhibits low background current because of the poor redox activity of peptide substrate and the high oxidation overpotential of H 2 O molecule. Based on the signal amplification of protease and redox cycling, the target concentration as low as 10 pg/mL can be readily measured with prostate-specific antigen (PSA) as the model analyte. The proposed immunosensor was applied to determine PSA in human serum samples with satisfactory results.
研究领域:
分析化学
·
生物化学
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纳米技术
·
电化学
·
免疫学
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2021
·
IF 3.383
Qing Wang,Yun Mou,Jiaxin Liu,Yang Peng,Mingxiang Chen
The electrochemical behavior of additives determinates the filling process of through ceramic holes (TCHs), which is severely affected by Cu(II) concentration in the virgin make-up solution (VMS). High concentrations of Cu(II) are rarely reported in through-holes (THs) filling owing to its insufficient throwing power. High concentration CuSO 4 (0.7 M) and low concentration H 2 SO 4 (0.61 M) were confirmed as VMS, and thiazolinyl polydipropyl sulfonate (SH110), polyethylene glycol (PEG), and nitrotetrazolium blue chloride (NBT) were chosen as the accelerator, suppressor, and leveler, respectively. The electroplating performances were investigated under different plating solutions. The electrochemical behavior of additives and their combinations were evaluated by galvanostatic and cyclic voltammetric measurements. The filling performance of PEG-SH110-NBT in high Cu(II) solution is affected by convection. Plating efficiency is effectively improved by SH110 in the designed high Cu(II) plating solution. PEG and NBT have a synergistic effect on inhibition, while NBT shows a leveling effect only in the presence of SH110. The plating solution with a low air agitation flow rate effectively promotes the high-quality filling of TCHs with a high aspect ratio (AR) of 5, 4.75, and 3.8. The filled TCHs display mirror-bright surface and grain refinement without the void defects.
研究领域:
电化学
·
材料科学
·
化学工程
·
表面技术
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2015
·Vol. 40
·期 1
·755-763
·
IF 3.086
Zhihong Zhang,Hongfei Ji,Shuai Zhang,Donglai Peng,Qixuan Fu,Minghua Wang,Linghao He,Lingyu Yue
We report a novel nanocomposite of hollow TiO2 microspheres and plasma polyacrylic acid (TiO2@PPAA) modified with rhodamine B (TiO2@PPAA-RhB). This nanocomposite was further used as an electrochemical sensor for the ultra-sensitive and selective detection of Cu2+ in water. A gold electrode was modified with hollow TiO2 nanospheres, followed by the closely bonded layer of PPAA via plasma polymerization. Subsequently, the carboxyl groups of TiO2@PPAA nanocomposites were activated to ester groups by N-hydroxysuccinimide/1-ethyl-3-(3-dimethylaminoprolyl) carbodiimide hydrochloride. The resultant activated ester groups reacted with the amino groups on rhodamine to form the amide groups, leading to the modification of TiO2@PPAA nanocomposites with rhodamine. Considering the synergistic effect of strong electrostatic interaction between the carboxyl groups of PPAA and Cu2+, the direct adsorption of Cu2+ on the TiO2 surface, and the coordination chemistry formed between Cu2+ and rhodamine, the developed electrochemical biosensor exhibited high sensitivity of Cu2+ detection, with a detection limit of 0.404 pM within the range of 0.001–10 nM of Cu2+. Therefore, the fabricated electrochemical sensor based on TiO2@PPAA-RhB can be obtained via plasma polymerization and represents a highly promising tool for use in environmental monitoring.
研究领域:
电化学
·
材料科学
·
环境监测
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）