ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2019
·Vol. 411
·期 25
·6645-6653
·
IF 3.286
Ma Xin,Lin Shijun,Dang Yunfei,Dai Yu,Zhang Xiaojin,Xia Fan
Carbon dot (CD)-based fluorescent probes have been widely exploited; however, multi-component detection using CDs without tedious surface modification is always a challenging task. Here, we develop a convenient and simple CD-based “on-off-on” fluorescent probe for detection of copper(II) ion (Cu 2+ ), ascorbic acid (AA), and acid phosphatase (ACP). Cu 2+ leads to the fluorescence quenching of CDs. The limit of detection (LOD) for Cu 2+ is 2.4 μM. When AA is added into the CDs + Cu 2+ solution, Cu 2+ is reduced by AA to Cu + , causing the fluorescence recovery of CDs. The fluorescent intensity linearly correlates with the concentration of AA in the range of 100–2800 μM with LOD of 60 μM. Besides, the probe has potential application for detection of AA in real samples such as VC tablets, orange juice, and fresh orange. The probe can also indirectly detect ACP that enzymatically hydrolyzes ascorbic acid-phosphate (AAP) to produce AA. This work expands the application of CDs in the multi-component detection and provides a facile fluorescent probe for detection of AA in real samples.
Graphical abstract
研究领域:
分析化学
·
生物化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Liuting Mo,Yulin Shen,Yi Tan,Shifeng Zhang
Water contamination by heavy metal pollutants is a global concern due to detrimental effects on the environment and human health. Regenerable, high-performance heavy metal sorbents are urgently demanded for improved water purification . Herein, we present an elegant strategy of interweaving metal–organic framework (MOF-808-ethylene diamine tetraacetic acid) and TEMPO-oxidized cellulose nanofibers (TCNF) to construct freeways in hybrid aerogels for rapid and efficient transport and capture of heavy metal ions. In this strategy, a postsynthetic ligand exchange approach is applied to introduce ordered and high-density accessible binding sites for metal ions. The prepared aerogels show excellent shapeability, ultralow density less than 0.005 g cm −3 , and high hierarchical porosity of 99.82%. Furthermore, benefiting from the abundant chelating groups and accessible surface areas, these aerogels exhibit outstanding uptake capacity of 300 mg g −1 and rapid adsorption kinetics of 0.031 mg g −1 h −1 for Cu(II) ions, significantly better than conventional TCNF aerogels. The aerogels could be easily regenerated at least five cycles without greatly performance loss. These aerogels could effectively remove diverse heavy metal ions from complicated contaminated water. Thus, this work provides a novel method to synthesize environmental-friendly, regenerable, and high-performance adsorption materials for water remediation.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Shuai Tang,Lujian Lin,Xuesong Wang,Anqi Yu,Xuan Sun
In water environments, nylon microplastics (MPs) and heavy metals are two kinds of common pollutants. This study investigated the adsorption of three divalent metals (Cu(II), Ni(II), Zn(II)) onto collected nylon MPs as function of contact time, temperature, solution pH, ionic strength and concentration of fulvic acid (FA). The kinetic data fitted well with the Elovich and pseudo-second order equations. The result of shrinking core model (SCM) confirms that the adsorption of Cu(II) and Zn(II) was mainly controlled by intraparticle diffusion. The adsorption of three metal ions onto collected nylon MPs is spontaneous, endothermic, with an increased randomness in nature. The Langmuir and Freundlich models successfully described the adsorption isotherms. The speciation distributions of three divalent metals in aqueous solutions were identified to analyze the effects of initial solution pH, ionic strength and fulvic acid concentrations on the adsorption amounts. X-ray photoelectron spectroscopy (XPS) analysis indicates the importance of surface O-containing groups of collected nylon MPs in controlling the adsorption of three metal ions. This research provides a clear theoretical basis for the behavior of nylon MPs as heavy metals (Cu(II), Ni(II), Zn(II)) carrier and highlights their environmental toxicity, which deserves to be further concerned.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
高影响因子
ANALYST
·
2022
·Vol. 147
·期 23
·5324-5333
·
IF 5.227
Jie Zhang,Xue-Ji Zhang,Serge Cosnier,Dan Shan
In the rapid development of artificial nanomaterials comparable to biological enzymes, we propose herein a novel concept for the construction of functional materials inspired from chemical evolution. To mimic the formation process of the catalytic system for the origin of life, dicyandiamide (DCD) was used as an elemental molecule for the de novo synthesis of an electrocatalyst. DCD was initially condensed with glucose (Glu) to form carbon dots (CDs) via a hydrothermal method. The self-assembly of the DCD-derived CDs was then modulated by introducing copper ions and a controlled pyrolysis process. Carbonization of the self-organized DCD-CDs/Cu at 300 °C in air produced the resultant catalyst (DCD-CDs/Cu-300) with the crystalline properties of a transitional state from an organic to inorganic matter, possessing a well-tuned chemical composition and the enhanced electrochemical signal of H2O2 reduction. Therefore, the DCD-CDs/Cu-300 modified electrode provides satisfactory analytical performance for trace H2O2 quantification with a wider linear range (1.0 × 10−7 to 1.4 × 10−3 M) and low detection limit (6.4 × 10−8 M, S/N = 3). This facile electrocatalyst construction strategy inspired from chemical evolution is expected to pave the way to form a more unified paradigm by integrating nanotechnology.
研究领域:
材料科学
·
分析化学
·
仿生学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2025
·
IF 1
Jingyi Chen,Xiaoxue Zhang,Junsheng Liu,Shan Jiang,Chunyu Ji,Jie Zhang
A series of novel polyethyleneimine/graphene oxide (PEI@GO) membranes were prepared and their adsorptions for heavy metal ions in mixed solutions were examined. It was found that they had good sorption performances for Pb(II), Cu(II), and Zn(II) in water. Their adsorptions for Pb(II), Cu(II), and Zn(II) obeyed the first-order kinetic modeling, dominating a physical style. Meanwhile, the fitting of intra-particle diffusion showed that Pb(II) and Cu(II) did not conform to the intra-particle diffusion stage, whereas Zn(II) did. Moreover, it was confirmed that the sorption of PEI@GO membranes for Pb(II), Cu(II), and Zn(II) followed the Langmuir isotherm modeling, and the maximal values could reach 79.6 mg/g for Pb(II), 35.01 mg/g for Cu(II), and 32.27 mg/g for Zn(II), respectively. The calculation of thermodynamic parameters indicated that these adsorptions were spontaneous and endothermic processes. Further, the investigation of PEI@GO membranes for Pb(II), Cu(II), and Zn(II) in ternary mixed systems evidenced that Zn(II) can be preferentially removed via step-by-step mode. In addition, the exploration of sorption mechanism using XPS and FTIR analyses showed that ligand interactions were involved in the adsorptive removal of Pb(II), Cu(II), and Zn(II). This study discloses that PEI@GO membranes are promising adsorbents for the removal of heavy metal ions from water.
研究领域:
环境科学
·
材料科学
·
水处理
·
吸附技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2026
·
IF 5.7
Van-Hien Pham,Nguyen Quang Tu Le,Bich-Ngoc Duong,Tran Duy Tap,Ngoc-Quyen Tran,Van-Phuc Dinh
Electron beam (EB) irradiation successfully shifted ETS-10 zeolite from a microporous to a mesoporous framework. • XRD and SEM confirmed crystalline framework and morphology remained stable under EB radiation up to 1000 kGy. • 1000 kGy dose expanded pore size to 8 nm and increased the specific surface area to 333 m 2 /g. • Modified mesoporous structure improved ion diffusion, yielding high capacities of 878.16 mg/g for Pb(II) and 181.69 mg/g for Cu(II). • Adsorption behaviour followed the Sips model, indicating a hybrid multilayer-to-monolayer transition on a heterogeneous surface. ETS-10 zeolite is known for its superior adsorption properties and high ion-exchange capacity, making it suitable for applications in adsorption. While the pristine ETS-10 framework possesses inherent acidic sites and a unique crystalline structure, its performance is often limited by its purely microporous nature. This study investigated the modification of ETS-10 using electron beam (EB) irradiation to enhance its capacity for removing Pb(II) and Cu(II) ions from aqueous solutions. Our results demonstrated that EB irradiation was a highly effective method for inducing a structural transition from microporous to mesoporous without compromising the structure of ETS-10 zeolite. Under EB irradiation dose of 1000 kGy, the specific surface area of ETS-10 increased to 333 m 2 /g, the pore size expanded to 8 nm, and the adsorption reached 878.16 mg/g for Pb(II) and 181.69 mg/g for Cu(II). The adsorption data for both pristine and irradiated samples were best described by the Sips isotherm model, suggesting a hybrid adsorption behaviour on a heterogeneous surface that transitions from multilayer at low concentrations to monolayer at higher concentrations. Treating titanosilicate ETS-10 with 1000 kGy electron beam (EB) irradiation significantly improved its cyclic reusability across five consecutive adsorption-desorption runs. These findings highlight the potential of EB irradiation as a powerful tool for tailoring the porosity of titanosilicate for advanced environmental remediation. Download: Download high-res image (127KB) Download: Download full-size image
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Guanji Chen,Dan Qiu,Li Xu,Guangjie Liang,Peng Xie,Yuewen Huang,Shudong Lin,Bin Wang
Efficient removal and rapid in situ monitoring of Cu(II) in wastewater are of great importance for aquatic environmental remediation, yet conventional adsorbents generally fail to simultaneously achieve high adsorption capacity and quantitative detection. In this study, a N-doped carbon dot composite hydrogel strategy integrating adsorption and fluorescence sensing was proposed. A three-dimensional hydrogel network rich in N/O-containing functional groups was constructed using gelatin methacryloyl (GelMA), acrylic acid (AAc), acrylamide (AAm), and nitrogen-doped carbon dots (NCDs) were further introduced to fabricate the bifunctional fluorescent composite hydrogel NCDs-GA 1 A 2 gel. This structure not only provided abundant coordination and electrostatic adsorption sites for Cu(II), but also endowed the material with optical responsiveness for fluorescence detection. Batch adsorption experiments showed that the Cu(II) adsorption process followed the pseudo-second-order kinetic model and the Langmuir isotherm model, indicating monolayer chemisorption, with a maximum theoretical adsorption capacity of 203.1 mg·g −1 . After ten adsorption-desorption cycles, the hydrogel retained 86.7% of its initial adsorption capacity, demonstrating favorable regeneration stability. Meanwhile, NCDs-GA 1 A 2 gel could serve as a fluorescent probe for Cu(II), showing a good linear fluorescence response to Cu(II) concentration and a low detection limit of 0.65 μM. Coexisting ion interference experiments further confirmed its excellent selectivity and anti-interference capability. This work provides a facile strategy for developing multifunctional biomass-derived fluorescent hydrogel adsorbents and demonstrates promising application potential for Cu(II) removal and in situ detection in wastewater
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产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 96
·79022-79030
·
IF 3.84
Lei Xu,Xiaoqiong Lu,Xiaomin Cheng
A series of novel cotton cellulose-graft-polycaprolactone copolymers with different grafting contents were successfully prepared via ring-opening polymerization (ROP) in an ionic liquid 1-N-butyl-3-methylimidazolium chloride ([Bmim]Cl). The structures of the grafting copolymers were systematically characterized by FTIR, CP/MAS13C-NMR, XRD, SEM and AFM, while thermal properties were investigated by DSC and TGA. Subsequently, Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich (D–R) adsorption isotherms were representative to simulate adsorption isotherms of Cu(II) and Ni(II) ions in aqueous solution. From the comparison of different adsorption isotherm models, it was found that adsorption of Cu(II) by modified cellulose followed Langmuir, Freundlich and Temkin models, while that of Ni(II) followed the Freundlich model. The results of adsorption indicated that the selectivity sequence of metal ions on graft copolymers was Cu(II) > Ni(II) and the maximum removal capacities of Cu(II) and Ni(II) ions were 98.7% and 35.6%, respectively. Hence, the graft copolymers exhibited significant potential to be an environmentally feasible biosorbent for removal of Cu(II) and Ni(II) ions from aqueous solution.
研究领域:
环境科学
·
高分子化学
·
材料科学
·
重金属去除
·
吸附技术
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Xiaohui Liu,Yitao Liu,Jia Wei,Yuhan Zhu,Yifei Zhang,Luyi Xing,Jun Li
Recently, the use of biochar for wastewater treatment has become a central focus in environmental remediation studies. In this research, a simple and economical one-pot hydrothermal strategy was developed for the synthesis of iron-modified sludge-derived hydrothermal biochar (ISHB). The obtained optimum ISHB possesses abundant hydroxy, carboxyl and aromatic ring surface functional groups as well as relative high surface area and small particle size which contribute to the adsorption of the enhanced contaminants. The structure-activity relationship and the adsorption behavior between the ISHB and doxycycline (DOX) were explored. The loaded iron improved the adsorption capacity of ISHB from 51.65 to 78.93 mg g –1 at 20°C with an initial DOX concentration of 60 mg L –1 . As Cu(II) exists in the DOX solution, the adsorption of DOX is inhibited to 50.06 mg g –1 due to the site competition between DOX and Cu(II). Nevertheless, the adsorption of Cu(II) is promoted, which can be explained by the complexation between DOX and Cu(II).
研究领域:
环境科学
·
化学工程
·
水体修复
·
吸附技术
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2026
·
IF 10.6
Zhe Xu,Weilan Zhen,Chengfeng Liu,Jiantong Zhou,Taicheng An
The speciation compatibility of Cu-ligand complexes and catalytic oxidation systems fundamentally governs their decomplexation efficiency, exhibiting pronounced ligand concentration dependence. While contemporary methodologies predominantly focus on stoichiometric Cu(II)-ligand complexes, their efficacy in treating wastewater with ligand excess remains technologically contentious. This study demonstrates the Mn(II)/peroxymonosulfate (PMS) process as a robust solution for the elimination of Cu(II)-ligand complexes even in excessive ligand environments. Using Cu(II)-EDTA as the representative complex, 90% decomplexation was achieved within 1 and 5 min at [EDTA] 0 :[Cu] ratios of 1:1 and 2:1, respectively, surpassing reported decomplexation approaches such as UV/H 2 O 2 , UV/peroxydisulfate (PDS), and Co 2+ /PMS. Mechanistic investigations through oxidation species characterization and product analysis revealed a successive decarboxylation of EDTA by non-radical pathway, i.e., high valence metals and singlet oxygen, enhancing process selectivity while minimizing oxidant consumption ([PMS] 0 :[EDTA] 0 = 30:1). The system exhibits dual mechanistic regimes: (i) instantaneous decomplexation under ligand-deficient conditions via PMS activation by in-situ formed CuO through alkaline precipitation, and (ii) cascade decomplexation for ligand-rich systems involving Mn-Cu synergistic destruction of excessive EDTA prior to CuO-catalyzed degradation of residual ligand. Such synergism is believed to stem from the electron transfer from Cu(II) to Mn(V/VI), forming reactive Cu(III) for decomplexation through intramolecular electron transfer. The Mn(II)/PMS system also exhibited the applicability in treating various Cu(II)-ligand complexes and real wastewater. This work establishes a practical strategy for reliable treatment of industrial wastewater containing non-stoichiometric Cu-ligand complexes.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2012
·Vol. 1
·期 4
·1319-1325
·
IF 0
Xiaoyong Qiu,Shuhua Han,Meng Gao
Rhodamine-6G Schiff-base bridged periodic mesoporous organosilicas (RSPMOs) were successfully synthesized by co-condensation of rhodamine Schiff-base derivative-bridged organosilanes and tetraethoxysilane (TEOS), using the ionic liquid 1-hexadecyl-3-methylimidazolium bromide (C16mimBr) as a structure-directing agent. The formation mechanism of ordered mesoporous hybrid materials with crystal-like pore walls was mediated by the self-assembly of both the long-chain ionic liquid and the new organosilane precursors. As the molar fraction of the new organosilane precursors was above 1%, hybrid materials with crystal-like pore walls were obtained, which was due to the face-to-face π–π interaction between rhodamine moieties of the new organosilane precursors within the framework. Little or no fluorescence emission of the hybrid material with rhodamine Schiff-base units was observed because of the existence of spirolactam in rhodamine moieties before chelating with metal ions. However, a dramatic enhancement in fluorescence emission was shown due to opening of the spiro structure in rhodamine moieties, which was induced by intramolecular charge transfer from metal ions to rhodamine units when the hybrid materials chelated with corresponding metal ions. RSPMOs showed high sensitivity and selectivity towards Cu2+ in aqueous solutions with good tolerance for other metal ions, showing great superiority in practical application.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
CELLULOSE
·
2022
·Vol. 29
·期 15
·8353-8370
·
IF 6.123
Mo Liuting,Zhang Shifeng
Aerogels, as attractive absorbents, have played essential roles in water treatment due to their light weight, high porosity, and exceptional absorption capacity. Nevertheless, conventional synthetic aerogel usually shows isotropic architectures, unsatisfactory mechanical performance, complex preparation process, and scale-limited fabrication, greatly limiting its applications in water remediation. In this study, inspired by the anisotropic architecture of natural wood, a biomimetic strategy was reported to prepare anisotropic, robust and environmental resistant aerogel composites via assembling semi-interpenetrating polymer networks (semi-IPNs) into the delignified wood template. The anisotropic structure endows the aerogel with excellent anisotropic mechanical behavior. The intermolecular hydrogen bonds of the cellulose microfibrils, the strong interfacial hydrogen bonds between cellulose chains and PI polymer networks, as well as the covalent bonds of semi-IPNs systems enable the aerogel composites to have a high yield strength of 566 kPa and Young’s modulus of 56.335 MPa. The resulting aerogel composite exhibits a high saturation adsorption capacity of 296 mg g −1 at about 100 min for Cu(II) ions. The composite is easily regenerated and recycled five cycles without apparent removal efficiency loss. This study presents a promising, eco-friendly, low-cost, and feasible strategy for scalable fabricating anisotropic, robust, highly efficient, and environmental resistant aerogel composites for heavy metal ions removal. Graphical abstract
研究领域:
材料科学
·
环境工程
·
化学工程
·
水处理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）