MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 9
·1-15
·
IF 5.3
Guo Jieli,Li Jin,Xing Xiujing,Xiong Wei,Li Hao
As an ideal transition metal oxide, Co 3 O 4 is a P-type semiconductor with excellent electrical conductivity, non-toxicity and low cost. This work reports the successful construction of Co 3 O 4 materials derived from metal-organic frameworks (MOFs) using a surfactant micelle template-solvothermal method. The modified electrodes are investigated for their ability to electrochemically detect Pb 2+ and Cu 2+ in aqueous environments. By adjusting the mass ratios of alkaline modifiers, the morphological microstructures of Co 3 O 4 -X exhibit a transition from distinctive microspheres composed of fiber stacks to rods. The results indicate that Co 3 O 4 -1(NH 4 F/CO(NH 2 ) 2 = 1:0) has a distinctive microsphere structure composed of stacked fibers, unlike the other two materials. Co 3 O 4 -1/GCE is used as the active material of the modified electrode, it shows the largest peak response currents to Pb 2+ and Cu 2+ , and efficiently detects Pb 2+ and Cu 2+ in the aqueous environment individually and simultaneously. The linear response range of Co 3 O 4 -1/GCE for the simultaneous detection of Pb 2+ and Cu 2+ is 0.5–1.5 μM, with the limits of detection (LOD, S/N = 3) are 9.77 nM and 14.97 nM, respectively. The material exhibits a favorable electrochemical response, via a distinctive Co 3 O 4 -1 microsphere structure composed of stacked fibers. This structure enhances the number of active adsorption sites on the material, thereby facilitating the adsorption of heavy metal ions (HMIs). The presence of oxygen vacancies (O V ) can also facilitate the adsorption of ions. The Co 3 O 4 -1/GCE electrode also exhibits excellent anti-interference ability, stability, and repeatability. This is of great practical significance for detecting Pb 2+ and Cu 2+ in real water samples and provides a new approach for developing high-performance metal oxide electrochemical sensors derived from MOFs. Graphical abstract
研究领域:
材料科学
·
电化学
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DOI
PubMed
高影响因子
TALANTA
·
2021
·
IF 6.057
Linna Huang,Feng Chen,Xia Zong,Qiujun Lu,Cuiyan Wu,Ziqi Ni,Meiling Liu,Youyu Zhang
Due to similar charges, atomic radii, and chemical properties of most metal ions , the selective sensing of these metal ions and imaging in vivo is still a challenge. A DNAzyme assemblied and near-infrared (NIR) light excited nanosensor was developed to detect and image Pb 2+ . In this nanosensor, NaYF 4 :Yb, Er upconversion nanoparticles (UCNPs) introduced as NIR-to-Vis transducer were the donor of luminescence resonance energy transfer (LRET), and DNAzyme-functionalized black hole quencher 1 (BHQ1) acted as energy transfer acceptor. This proposed nanosensor was applied to detecting Pb 2+ in solution with high sensitivity and selectivity . Furthermore, we have successfully demonstrated the imaging ability of this nanosensor towords Pb 2+ in living cells and early-stage zebrafish with negligible autofluorescence and good photostability. The UCNP-DNAzyme nanosensor would enrich the method of imaging Pb 2+ in vivo, and might serve as a potential tool for understanding the metabolic pathways of Pb 2+ and the mechanism of lead poisoning in biological system.
研究领域:
生物化学
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分析化学
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分子生物学
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DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Zhu Lingkai,Xi Man,Yao Yuyuan,Lan Ping
In this study, thiol functionalized activated carbon fibers (ACF-SH) are employed to improve adsorption performances of heavy metals, resulting high density of sulfur-containing and nitrogen-containing groups (6.64 atom % S, 4.49 atom % N confirmed by X-ray Photoelectron Spectroscopy, XPS) and high binding affinity towards Pb 2+ . We find that time, pH, initial ion concentration and adsorbent dosage are important factors affecting the adsorption capacity of modified activated carbon fibers for Pb 2+ . The kinetics and isotherm studies show that the pseudo-second-order model and Langmuir isotherm model can more reasonably explain the adsorption mechanism. Excitingly, the q max obtained through Langmuir isotherm model reaches 700.77 mg g −1 , which significantly surpassed most fiber-based adsorbents. Thermodynamic results significantly exhibit positive ΔH θ and ΔS θ indicating the endothermic property during Pb 2+ adsorption onto ACF-SH with an increase, and a negative ΔG θ reveals its spontaneous at the same time. Moreover, the adsorption mechanism is revealed by diversified analysis. The outcomes from this work indicate that the activated carbon fibers are promising as an adsorbent for effectively repairing Pb 2+ ions in effluent.
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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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2017
·Vol. 28
·期 11
·1418-1427
·
IF 1.907
Like Zhang,Yanan Wang,Jiajia Huang,Siguo Yuan
Herein, we report the synthesis and adsorption property of a novel chelating fiber containing azido group. Firstly, the brominated fiber (PP-St-DVB-Br) was obtained via the reaction of polypropylene-(g)-styrene-divinylbenzene fiber (PP-St-DVB) with bromine in CH 2 Cl 2 solution. Then, azido chelating fiber (PP-St-DVB-N 3 ) was prepared by azidation of PP-St-DVB-Br fiber. Its structure and properties were characterized by Fourier transform infrared, elemental analysis, thermogravimetric analysis, and chemical titration, respectively. The micromophology and functional group distribution in fibrous matrix were investigated by scanning electron microscopy-energy dispersive spectroscopy. The results show that the chelating fiber has high functional group contents (2.11 mmol/g for PP-St-DVB-N 3 ) and uniform distribution. Different from granulate chelating resin, the novel fibrous adsorbent possesses excellent adsorption ability for Hg(II) and Pb(II) ions (408.9 mg/g for Hg 2+ and 334.4 mg/g for Pb 2+ ), and the adsorption capacity of the fiber has no loss until five cycles. The novel absorbent material shows the potential application prospect in the treatment of heavy metal wastewater. Copyright © 2017 John Wiley & Sons, Ltd.
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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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Jie Guo,Qiang Hu,Min Lu,Asu Li,Xiaoyu Zhang,Ren Sheng,Ping Chen,Yu Zhang,Jinlei Wu,Yuhao Fu,Guang Sun,William W. Yu,Xue Bai
One-dimensional (1D) semiconductor nanorods (NRs) are very promising materials for light-emitting diodes (LEDs) due to their unique optoelectronic properties, while the research on 1D perovskite NRs is relatively rare. Herein, the 1D CsCdBr 3 perovskite NRs were synthesized by simple thermal injection method, in which the [CdX 6 ] 4- octahedra sharing opposite faces can form infinite linear chains along the c axis. But their low photoluminescence quantum yields (PL QYs) limit their application in LEDs. To improve the optoelectronic properties of CsCdBr 3 NRs, the PbBr 2 is chosen as the dopant to synthesize the Pb 2+ doped CsCdBr 3 perovskite NRs. When the molar ratio of PbBr 2 :CdBr 2 is 0.25, the perovskite NRs with the PL QYs of 48% and pure-blue emission centered at 459 nm were obtained. Furthermore, the optimized NRs were used as the emissive layer to fabricate a perovskite LED that is the only one blue perovskite LED based on 1D NRs. This device shows bright pure-blue emission with good spectral stability, suggesting that the 1D perovskite NRs are good choice to achieve next-generation lighting and display.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2023
·
IF 5.2
Kuixin Cui,Shengming Jin,Nan Duan
The adsorption mechanism of benzohydroxamic acid (BHA) on rhodochrosite surfaces under Pb 2+ activation was systematically studied through a series of experiments. Comparing to the results of only BHA treatment, Pb 2+ ions raised the adsorption amount of BHA and the floatability of rhodochrosite, especially at pH 8.0–9.0. It was proven that Pb(OH) + was deemed as the critical species to adsorb onto rhodochrosite surfaces in the form of lead-containing complexes. Afterwards, rhodochrosite surfaces became much more activated for BHA adsorption. BHA collector reacted with adsorbed-Pb and Mn species of rhodochrosite surfaces, and the charged hydroxamic acid also adsorbed onto rhodochrosite surfaces through electrostatic attraction and co-adsorption. Besides, lead hydroxamate complexes generated in suspension had excellent adhesions on rhodochroganite surfaces. It was apparent that the BHA adsorption was strengthened under the activation of Pb 2+ ions. BHA collector matching with Pb 2+ ions had great potentials to improve the flotation recovery of rhodochrosite.
研究领域:
矿物加工工程
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表面化学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Huan Xing,Yuxin Song,Liang Ma,Fengxia Wang,Mingfang Zhang,Zhonghao Li,Zherui Wan,Xiaoxu Cui,Guang Yang
The fabrication of stimulus-responsive polydiacetylene (PDA) materials with thermochromic reversibility is highly valuable for displays, optoelectronic devices, and sensors. Herein, a type of bis-diacetylene monomer (bis-DA) covalently linked by 1,4-phenylene diisocyanate was synthesized. Owing to the strong hydrogen-bonding interactions, a reversible color transition can be realized for the polymerized bis-diacetylene (bis-PDA) film in the temperature range from 30 to 150 °C. The excellent linear relationship between the colorimetric response values and temperature (from 90 to 150 °C) with an R2 value of 0.992 demonstrated that the as-prepared bis-PDA sensor can be used for the quantitative analysis of temperature. Meanwhile, the bis-PDA film displayed a reversible thermochromic property upon exposure to 980 nm near-infrared light at a relatively high power density. In addition, hybrid PDA vesicles that consist of DA and bis-DA monomers with a molar ratio of 1:1 can be utilized as sensitive, specific, and visual sensors for the detection of Pb2+ ions, with a satisfactory limit of detection of 0.15 μM. This work not only offers a fundamental understanding of the mechanism of the thermochromic property of PDA but also may broaden the applications of PDA-based sensors.
研究领域:
材料科学
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分析化学
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生物医学工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Zhan-fang Cao,Xin Wen,Jing Wang,Fan Yang,Hong Zhong,Shuai Wang,Zai-kun Wu
In this work, a kind of magnetic graphene oxide composite material (TI/GO@Fe 3 O 4 ) for Pb 2+ removal was successfully synthesized through in situ growth method. Briefly, metal ions (Fe 3+ ) were fixed on GO surface by oxygen-containing functional groups and acted as growth centers of Fe 3 O 4 . Furthermore, the surface of GO and Fe 3 O 4 nanoparticles were strengthened by the triisopropanolamine and its oxidation products (TI), which can promote the removal of Pb 2+ ions. The mass percentage of Fe 3 O 4 particles in TI/GO@Fe 3 O 4 was 54.31% by EDS datas. Average particle size of TI/GO@Fe 3 O 4 is 19.03 nm. The adsorption experiments indicated that the adsorption capacity of TI/GO@Fe 3 O 4 can reach 461.00 mg/g under optimized conditions (10 mg TI/GO@Fe 3 O 4 , 50 mL 500 mg/L Pb 2+ , pH 5.0, 293 K, 120 min). The XPS analysis results indicated that the TI/GO@Fe 3 O 4 can adsorb the Pb 2+ through the complexation between nitrogen and oxygen-containing functional groups and Pb 2+ ions. Hence, the composite material is a superior material for the adsorption of Pb 2+ . Moreover, the synthesized adsorbent can be recycled by magnet quickly after adsorption.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2020
·Vol. 27
·期 7
·1-10
·
IF 2.426
Li Paiwei,Dai Xin,Yan Qilin,Wang Zhenxi,Zhang Shangxi,Cao Meng
Dithizone is known to be very effective for heavy metal ions retention and widely used as developer in detection methods. To explore a novel surface modified polymer microspheres, this paper prepared a novel modified polystyrene (PS-g-D) microspheres by grafting dithizone as the complexing agent and developer on the surface of PS microspheres. The structure of PS-g-D was analyzed by FT-IR, and the formation of dithizone grafted PS microspheres was proved. The thermal stability and surface morphology of PS and modified PS were studied by TGA and SEM. PS-g-D had a uniform diameter of about 1 μm and exhibited a good thermal stability. The Pb 2+ removal increased and reached up to 99% with the decrease of initial Pb 2+ concentrations. The study of the isotherms model showed that the adsorption between PS-g-D and Pb 2+ is consistent with the Langmuir and Temkin adsorption isotherm models. The adsorption kinetics of PS-g-D is described well by the pseudo-second-order model. It can be seen that the modified PS microspheres exhibit a good adsorption property, and has real potential as a novel adsorbent for water treatment industry due to the introduction of dithizone as complexing agent and developer.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2024
·
IF 10.7
Chuanyu Yang,Caiyi Du,Feiyu Yuan,Peitong Yu,Boxu Wang,Changshun Su,Ruiqi Zou,Junyang Wang,Xu Yan,Chunyan Sun,Hongxia Li
Benefiting from specific target recognition and trans-cleavage capabilities, the CRISPR/Cas12a system has great application prospects in the design of highly sensitive and rapid fluorescence biosensors. The CRISPR/Cas12a-based fluorophore-quencher molecular beacons exhibit single-color emission and are easily exposed to interference from environmental factors. Herein, we design a CRISPR/Cas12a-derived ratiometric fluorescence sensor for Pb 2+ detection based on embedded carbon dots@zeolitic imidazolate framework-8 (CDs@ZIF-8) composites and DNAzyme. The functions of ZIF-8 about encapsulating red emissive CDs in the inner cavity and adsorbing DNA on the outer surface are integrated to establish dual fluorescence signals, thereby reducing the possibility of interference and improving sensing accuracy. The presence of Pb 2+ is converted into the change of activator by the GR5 DNAzyme to activate the CRISPR/Cas12a system, which provides signal amplification through multiple turnovers of side branch cutting, achieving highly sensitive detection of Pb 2+ with a low detection limit of 18 pM. This method has the advantages of simplicity, universality, and excellent quantitative ability, and has broad prospects in sensing applications.
研究领域:
生物传感
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分子生物学
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环境科学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2016
·
IF 2.567
Lilu Qin,Liangguo Yan,Jian Chen,Tiantian Liu,Haiqin Yu,Bin Du
The amino-functionalized magnetite/kaolin clay (MKC) was synthesized via a simple solvothermal method and used to remove Pb2+, Cu2+, and Cd2+ from aqueous solutions. In comparison, the kaolin clay (KC) and MKC were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and scanning and transmission electron microscopy with energy dispersive spectrometry. The results indicated amino-functionalized MKC was formed with Fe3O4 particles adhering to the surface by interactions with negatively charged KC. The optimal experimental conditions were evaluated, and the adsorption performance of MKC for Pb2+, Cu2+, and Cd2+ was far better than that of KC. This was mainly caused by adding an amino group, in which the amino group displayed complexing ability toward metal ions. In kinetic data representation, the pseudo-first-order, pseudo-second-order, and Elovich models were employed, and the second one gave the better fitting. Langmuir, Freundlich, and Dubinin–Radushkevich models were chosen for isotherm data correlation, of which the first one showed better suitability. The X-ray photoelectron spectroscopy analysis of MKC before and after adsorption further revealed that the adsorption mechanisms of Pb2+, Cu2+, and Cd2+ could be a combined reaction of complexation between functional groups and metal ions and electrostatic attraction. In addition, MKC can be rapidly separated using only a magnet after the adsorption process.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2024
·
IF 3.3
Chunxiao Wu,Sha Zhang,Jin Zhong Zhang,Yan Li
Water contamination from industrial activities has been a major problem throughout the world. Typically, lead ions (Pb2+) are recognized as a persistent contaminant posing a great threat to our environment and human health, which urgently needs to be solved. Adsorption is one of the most effective ways to solve it. MXenes show great potential for applications in the fields of adsorption due to their large specific surface area, excellent hydrophilicity, and structural stability. In this work, a series of V2CTx MXenes including multilayered V2CTx MXene (M-V2C), alkalized V2CTx MXene (A-V2C), and single-layer V2CTx MXene (S-V2C) were prepared by an etching method to apply for Pb2+ adsorption. Compared to M-V2C and A-V2C, S-V2C not only had the highest adsorption efficiency under the same conditions but also exhibited a wide pH adsorption ability in the range of 1–14, which cannot be achieved by other adsorbents. In addition, it showed great cycle performance after 10 cycles and selective adsorption of Pb2+ in the presence of other ions. Factors affecting the Pb2+ adsorption capacity of V2C and related mechanisms were also thoroughly investigated. This work demonstrates for the first time that S-V2C is a novel adsorbent material with excellent pH tolerance, regeneration performance, and selective adsorption ability, which shed bright light on the related applications.
研究领域:
环境科学
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材料科学
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水处理
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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）