MICROCHIMICA ACTA
·
2024
·Vol. 192
·期 1
·1-12
·
IF 5.3
Liu Xiang,Li Huijun,Sun Junjun,Shi Jianchao,Xu Zhouqing,Wang Yan
A HPU-23@Ru@Tb-NH 2 sensor array with light-driven oxidase-mimicking activity and triple-emission fluorescence was developed. It was composed of a Tb 3+ -functionalized metal organic framework and Ru(bpy) 3 2+ and applied to the simultaneous detection of Hg 2+ , ClO − , and PO 4 3− via differently responsive channels. HPU-23@Ru@Tb-NH 2 had a photoresponsive colorimetric response toward Hg 2+ with a LOD as low as 4.18 nM. In addition, the three emissions of the HPU-23@Ru@Tb-NH 2 sensor array were influenced by ClO − and PO 4 3− to varying degrees, causing remarkably distinguishable responses for the fluorescence channels to discriminate ClO − and PO 4 3− from each other. The detection limits of ClO − and PO 4 3− were 12.26 µM and 0.197 nM, respectively. Therefore, this work demonstrates the feasibility of multi-emission and multi-mode sensing platform, which is able to combine the advantages of different strategies for solving the problems of various toxic substances coexisting in the environment while meeting the needs of accurate and precise results and no side interferences. Graphical
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JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Xueqi Duan,Guona Li,Zhijian Jia,Hongzhen Xie,Xing Li
Copper is an essential element in the human body. Excess accumulations of copper, however, would become a potential threat. Therefore, it is of great significance to detect copper ions. Owing to their controllable morphology, dispersal characteristics, high extinction coefficient, and easily functionalized surfaces, gold nanoparticles (AuNPs) have been highly employed as attractive sensing probes for environmental and biological analyses. We herein propose an eco-friendly colorimetric strategy based on AuNPs modified with 3-pyridinylboronic acid (PA) for sensitive and selective detection of copper ions (Cu 2+ ) in water at trace level. The color changes of the system from wine-red to gray-blue with increasing amounts of copper ions is due to the binding of AuNPs modified with 3-pyridinylboronic acid to copper ions, which in turn leads to the aggregation of AuNPs with fine anti-interference. Strengths of the work: 1) rapid response time without complex pre-treatment; 2) high sensitivity with low limit of detection (LOD) and the good linear relationship ( R 2 = 0.98, LOD = 3.0 μM by the naked eye and 72 nM by ultraviolet-visible spectroscopy); 3) high selectivity under other interfering ions. In addition, the detection mechanism of this work has been successfully confirmed by density functional theory (DFT), transmission electron microscopy (TEM), dynamic light scattering (DLS), X-ray diffraction (XRD), Zeta potential analysis and ultraviolet-visible spectroscopy (UV–vis).
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Analytical Methods
·
2012
·Vol. 4
·期 8
·2441-2446
·
IF 1.547
Qian Zhang,Tao Liang,Lingqing Wang,Hongying Cao
A selective pressurized liquid extraction (SPLE) method has been optimized for the determination of polycyclic aromatic hydrocarbons (PAHs) in soil samples. The method comprises a fully automated extraction and on-line clean-up procedure by inclusion of sorbents in the extraction cells. The contributing parameters of SPLE including type of solvent, static extraction time, number of extractions, extraction temperature, nature and amount of sorbents were investigated. The optimal extraction was performed at 70 °C for 10 min (static extraction time) cycled once using n-hexane/methylene chloride (50 : 50, v/v) and the sorbents in the extraction cells were 3 g of alumina and 2 g of silica gel. The collected extracts from the cells, after pre-concentration, were clean enough for direct injection into GC-MS. Validation of the SPLE technique was performed, with the recovery rates for 16 PAHs in the range of 75–103%, and the relative standard deviation (RSD) was generally less than 10%. Method detection limits (MDL) were in the ranges of 0.001–0.080 μg kg−1 for the GC-MS analyses. Finally, the method was successfully used to evaluate the cultivated soils in Beijing, China.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Guangyuan Chen,Linzhen Wu,Zeru Wang,Ruixi Liu,Chuan Tan,Yi Tan,Yawen Liu,Miaomiao He,Hao Zhang,Yikun Huang,Jiongzhi Zhu,Tao Duan,Lin Zhu
The capture of radioactive gaseous iodine is essential for the sustainable development of nuclear energy and the long-term safe supply of nuclear fuel. However, the presence of nitrogen oxides in the exhaust gas generated during spent fuel reprocessing poses significant challenges to the stability of iodine adsorbents. It is crucial to consider the impact of NOx on the structure and adsorption performance of the materials. We report here the development of an aluminum-based metal–organic framework (MOF), CAU-1, engineered for efficient iodine capture. Synthesized through a cost-effective and straightforward method, CAU-1 exhibits excellent structural stability and robust adsorption performance, with a maximum iodine vapor adsorption capacity of 1277.18 mg/g at 130 °C and methyl iodide adsorption capacity of 533.10 mg/g, highlighting its potential for efficient iodine vapor removal. Notably, CAU-1 retains its structural integrity and iodine adsorption performance even in the presence of 5 % NO 2 , maintaining high adsorption capacities for I 2 (1129.41 mg/g) and CH 3 I (436.79 mg/g). Mechanistic analysis revealed the key role of the –NH 2 group in the iodine adsorption process. Additionally, co-adsorption studies with I 2 and NO 2 showed that CAU-1 can still capture iodine in the form of both I 2 and I 3 - in the presence of NO 2 . This study illustrates the potential of CAU-1 as an effective industrial adsorbent for removing iodine from NO 2 -containing gas streams.
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Energy Storage Materials
·
2024
·
IF 18.9
Kuo Wang,Tong Qiu,Lu Lin,Hongtu Zhan,Xiao-Xia Liu,Xiaoqi Sun
Zn anode experiences dendrite issues in aqueous Zn batteries. They result from uneven Zn 2+ flux and Sand behavior depending on the current density. Herein, the amino alcohol of 2,2′,2′′-nitrilotriethanol (NTE) additive with chelation ability is introduced to achieve stable and parallel Zn deposition. NTE preferentially adsorbs on Zn surface, which chelates with Zn 2+ at interface upon geometry transformation. It not only homogenizes Zn 2+ flux to inhibit dendrites at low current densities, but also supply sufficient Zn 2+ to delay Sand behavior at high current densities. Parallel growth of Zn hexagonal plates is realized. Thus, Zn plating/stripping in symmetric cells at 10 mA cm −2 reaches >1600 h cycle life with the addition of 2.5% NTE in the ZnSO 4 electrolyte, corresponding to a high cumulative plated capacity of 8.5 Ah cm −2 . At the conditions of 5 °C or 70% depth of discharge, the lifespans of symmetric cells also extend to 6977 h and 230 h, respectively. In anode free full cells, a Zn 2+ pre-inserted V 6 O 13 ·H 2 O cathode retains 250 mAh g −1 capacity after 300 cycles at 6 A g −1 , superior to 83 mAh g −1 with NTE free electrolyte.
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JOURNAL OF FOOD SCIENCE
·
2024
·
IF 3.2
Xi Wu,Chenggang Geng,Weiwei Cheng,Zhenjiong Wang,Yan Zhang,Di Wu,Xiaozhi Tang
In this work, an ultrasensitive electrochemical sensor based on Zr-MOF-SH/rGA/NPG was developed for the first time for the rapid determination of mercury ions. First, nanoporous gold (NPG) film was covered on the glassy carbon electrode (GCE) to offer a desirable substrate. Then, Zr-MOF-SH/rGA composites were dropped on the NPG film to form a modified electrode. Mercapto functionalized MOFs (Zr-MOF-SH) showed strong adsorption capability toward mercury ions, and the unique structure of reduced graphene oxide aerogel (rGA) provided various sites for coupling with Zr-MOF-SH as well as improved the electrochemical activity. As a consequence of the synergistic effect of Zr-MOF-SH, rGA, and NPG, the optimized Zr-MOF-SH/rGA/NPG/GCE sensor showed excellent detection performance toward mercury ions with a linear range from 0 to 200 nM and a low limit of detection of 1.4 nM. Meanwhile, the fabricated electrochemical sensor exhibited outstanding stability, reproducibility, and anti-interference ability. To verify the practical applicability, the Zr-MOF-SH/rGA/NPG/GCE was applied for the determination of mercury ions in real rice samples with desirable recovery rates ranging from 98.8% to 108.3%.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Tao Wu,Hassan Karimi-Maleh,Yan Li,Zhouxiang Zhang,Dongxing Zhang,Yangping Wen,Li Fu,Nianbing Zhong,Elena Niculina Dragoi,Tejraj M. Aminabhavi
MOFs/MXene adsorbent was prepared by in-situ growth of MOFs(ZIF-67/ZIF-8) crystal particles onto the surface and between the layers of multi-layer MXene substrate. The method followed complex separation and recovery steps after completion of adsorption and there can be a risk of secondary contamination. To avoid this, DLP technique was used to print a series of 3D printed structures (3DS) with a specific topography, the prepared MOFs/MXene composites were loaded onto surface of the structure. Polydopamine (PDA) was then coated onto the surface to prepare monolithic adsorbent (PDA/MOFs/MXene/3DS) that was easily separated and recovered. The adsorbent was characterized by SEM, XRD, FTIR, TGA and XPS, while the batch adsorption of CR and Hg (II) was performed under different experimental conditions. The optimal removal rate and maximum adsorption of the monolithic adsorbent for CR and Hg (II) were 99.13/94.10 % and 75.76/464.48 mg/g, respectively and adsorption followed chemisorption onto the surface monolayer, which was spontaneous and exothermic. Multiple cycle tests showed excellent removal of CR (82.29 %) and Hg (78.47 %). In addition, adsorbent with synergistic effects of electrostatic interactions, H-bonding and π-π stacking shows a good adsorption effect. The study proved that that PDA/MOFs/MXene/3DS is a high-strength, structurally designable, green and promising adsorbent for large-scale remediation of real contaminants frpm wastewater.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Xueqi Duan,Xing Li,Qingya Yang
Due to the serious threat of excessive copper and magnesium ions to human health, it is crucial to detect copper and magnesium ions in aquatic environments. In this study, we propose a colorimetric strategy – gold nanoparticles (AuNPs) modified by 5-(3-aminophenyl)-1H-tetrazole (TA@AuNPs) for the rapid and portable identification of copper and magnesium ions in water. As the concentration of the target metal ions increases, the colorimetric principle (TA@AuNPs) causes the aggregation of the AuNPs system, shifts of the surface plasma resonance (SPR) absorption peak, and a change of system colors (wine-red to gray-blue). The advantages of this work: 1) the detection process is simple without complex pretreatment; 2) the concentration of the target ions could be quickly detected within 3 min by Standard Color Cards; 3) it can selectively detect two kinds of metal ions (Cu 2+ and Mg 2+ ) with high specificity in the presence of other interfering ions; 4) It eliminates the interference of calcium ions in the detection of magnesium ions; 5) It has excellent linearity and low detection limit (for Cu 2+ : R 2 = 0.94, LOD = 30.0 μM by the naked eye and 0.229 μM through ultraviolet–visible spectroscopy; for Mg 2+ : R 2 = 0.96, LOD = 300 μM by the naked eye and 0.653 μM through ultraviolet–visible spectroscopy). Furthermore, the colorimetric mechanism of the present work has been comprehensively demonstrated through DLS, TEM, zeta potential analysis, FT-IR, UV–vis and Gaussian calculations.
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ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY
·
2017
·
IF 2.313
Hui Zhang,Xiaoxing Wu,Khalid Mehmood,Zhenyu Chang,Kun Li,Xiong Jiang,Fazul Nabi,Muhammad Ijaz,Mujeeb Ur Rehman,Muhammad Tariq Javed,Donghai Zhou
The nano copper has been widely used in modern clinical medicine practice. However, it has been noticed that nano copper particles induce cell injury and toxicity. The present study was designed to determine the effect of nano copper particles on cell injury of intestinal epithelial cells (IECs) in piglets. The IECs were treated with different doses of nano copper (5, 10, 20 and 40 μg/ml) for 24–48 h to observe cell injury and toxicity. Cell injury was measured based on morphological and other changes including oxidative stress and genes expression. The oxidative stress markers were assayed by differential expression levels of SOD, MDA and Metallothionein (MT) in addition to CTR1, SOD1, COX17, MT and ATOX1 genes expression. Cellular morphology showed an increasing growth of cells without nano copper treatment and nano copper showed significant damage to IECs with higher dose as compared to low dose. Higher doses of copper nanoparticles (10, 20 and 40 μg/ml) have membrane damaging effect on the intestinal epithelial cells, whereas MDA contents and MT value were significantly increased, and SOD activity was decreased with the increase in concentration of nanoparticles. Nano copper up-regulated the CTR1 and SOD1 genes and down-regulated the relative expression of COX17, MT and ATOX1 genes significantly in a dose-dependent manner. The findings of the current study provide important insights that nano copper plays an important role in intestinal epithelial cell injury and oxidative stress.
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MicrobiologyOpen
·
2017
·Vol. 6
·期 4
·e00485
·
IF 2.747
Xin Feng,Jian Xu,Yu Liang,Guo-Li Chen,Xian-Wei Fan,You-Zhi Li
Graphical Our work not only provides the potential protein biomarkers indicating the Cu pollution, target metabolic steps for engineering the Cu-tolerant fungi during bioremediation, but also presents clues for insight into heavy metal tolerance mechanisms of other eukaryotes. Filamentous fungi-copper (Cu) interactions are very important in the formation of natural ecosystems and the bioremediation of heavy metal pollution. However, important issues at the proteome level remain unclear. We compared six proteomes from Cu-resistant wild-type (WT) Penicillium janthinellum strain GXCR and a Cu-sensitive mutant (EC-6) under 0, 0.5, and 3 mmol/L Cu treatments using iTRAQ. A total of 495 known proteins were identified, and the following conclusions were drawn from the results: Cu tolerance depends on ATP generation and supply, which is relevant to glycolysis pathway activity; oxidative phosphorylation, the TCA cycle, gluconeogenesis, fatty acid synthesis, and metabolism are also affected by Cu; high Cu sensitivity is primarily due to an ATP energy deficit; among ATP generation pathways, Cu-sensitive and Cu-insensitive metabolic steps exist; gluconeogenesis pathway is crucial to the survival of fungi in Cu-containing and sugar-scarce environments; fungi change their proteomes via two routes (from ATP, ATP-dependent RNA helicases (ADRHs), and ribosome biogenesis to proteasomes and from ATP, ADRHs to spliceosomes and/or stress-adapted RNA degradosomes) to cope with changes in Cu concentrations; and unique routes exist through which fungi respond to high environmental Cu. Further, a general diagram of Cu-responsive paths and a model theory of high Cu are proposed at the proteome level. Our work not only provides the potential protein biomarkers that indicate Cu pollution and targets metabolic steps for engineering Cu-tolerant fungi during bioremediation but also presents clues for further insight into the heavy metal tolerance mechanisms of other eukaryotes.
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Journal of Energy Chemistry
·
2025
·
IF 14.9
Wenhui Fu,Yuxuan Tian,Chao Sui,Xiaorui Wang,Zhi Wang,Qiushi Chen,Junhao Liu,Xuzhong Gong
Polymer binders possess significant potential in alleviating the volume expansion issues of silicon-based anodes, yet remain challenging due to insufficient interfacial interactions with individual components (Si, C, and Cu) of the anode. Herein, we report the synthesis of a stable three-dimensional network structure of the PAA-PEA (polyacrylic acid-polyether amines) polymer binder through intermolecular physicochemical dual cross-linking. By incorporating polar functional groups, the binder molecules not only form strong C–O–Si, N–Si, O=C–O–C, and O=C–O–Cu covalent bonds but also enhance non-covalent interactions with Si, C, and Cu, thereby improving adhesion between the binder and each interface of the anode. Furthermore, weak hydrogen bonds, acting as “sacrificial bonds”, dissipate energy and disperse accumulated stress, improving the material flexibility. Due to the high mechanical stability of the framework, which combines both rigidity and flexibility and the coupling effect at the three interfaces, the movement and separation of electrode components are effectively restrained, significantly enhancing the cycling stability of silicon-graphite anodes. The PAA-PEA 2000 electrode exhibits a capacity retention of 78% after 500 cycles at a current density of 0.2 A g −1 . This work provides insights into the mechanism of binders and guides the design of polymer binders for high-performance Si-based electrodes.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Jingyu Zhang,Yan Wang,Mei Hong,Bin Peng,Yicheng Jiang,Shaobin Wen,Weishuo Li,Qiang Zhang
Fenton catalyst plays a significant role in Fenton-reaction mediated water treatment. Herein, three ferrocene-containing polymers have been prepared as smart Fenton catalysts capable of switching between homogeneous and heterogeneous phases for degrading complex water pollutants. Specifically, at 25℃, the smart catalyst is hydrophilic and parallels the catalytic behavior of correspondingly homogeneous one. While at 50℃, the smart catalyst aligns with the performance of heterogeneous one, showing a catalytic preference towards hydrophobic pollutants. The catalytic mechanism of all three catalysts are based on generated superoxide radicals and singlet oxygen, of which generation is not affected by temperatures. Notably, the polymeric Fenton-catalyst displayed a super tolerance towards salts. Our study provides a possibility of degrading complex water pollutants with one smart catalyst.
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