Materials Today Energy
·
2021
·
IF 7.311
C. Liu,X. Chi,J. Huang,Y. Liu
Development of rechargeable alkaline Zn–Mn batteries has been facing big challenges for low working voltage and poor cycling stability, although they have advantages of low cost, high safety, and simple maintenance. For the first time, this work demonstrates a record high voltage (1.78 V) for rechargeable alkaline Zn–MnO 4 − battery achieved by a high reversible redox pair of MnO 4 − /MnO 4 2− , which shows excellent cycling stability up to 1,500 cycles at a high current density of 20 mA cm −2 without obvious capacity attenuation. The MnO 4 − /MnO 4 2− redox reaction investigated by ex-situ scanning electron microscope as well as ultraviolet and visible absorption spectrum indicates high reversibility of the MnO 4 − /MnO 4 2− redox couple after the activation during the first discharge process. Furthermore, benefiting from the liquid-phase reaction nature of MnO 4 − /MnO 4 2− , a flow battery is further prototyped to show highly stable cycles with 95.8% of discharge capacity retention for 600 cycles at the current density of 40 mA cm −2 .
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Maoxia Ran,Haiyan Qi,Tao Jing,Jun Li,Wenbo Li,Jiayu Zhang,Chao Luo,Xiaochen Zhu,Yang Gao
Herein, high-efficiency green fluorescence nitrogen doped CDs (G-CDs) were prepared using acetaminophen and ethylenediamine as precursors. The G-CDs exhibited good anti-photobleaching, salt tolerance and low cytotoxicity. Interestingly, the G-CDs revealed excellent fluorescence stability in the pH range of 6–12, however, the intensity of the G-CDs was almost completely quenched in other pH values. The MnO 4 − demonstrated strong fluorescence quenching capability on our G-CDs with the mechanism involving dynamic quenching caused by energy transfer. G-CDs exhibited a strong linear relationship with MnO 4 − concentration in the range of 0–75 μmol/L, with a low limit detection of 7.6 nmol/L. What was even more interesting was that the G-CDs displayed bright green solid-state fluorescence, and exhibited potential application in anti-counterfeiting.
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Cheng Qian,Guocheng Zhou,Zhonglong Wang,Yuqian Liu,Yiqin Yang
Systematically clarifies how lignin molecular weight and sulfonation regulate CQDs fluorescence properties. • Develops green NSCDs from renewable sulfonated lignin, reducing the cost and environmental impact of CQDs. • Prepared NSCDs show high performance with 21.54% QY, 0.11 μM MnO₄⁻ LOD, and <1 min response time. • Confirms MnO₄ − fluorescence quenching is static quenching via chelation, excluding redox and energy transfer. • NSCDs sensor enables trace MnO₄ − detection in real water and promotes high-value utilization of lignin waste. Exploring a sensitive and accurate method for environmental permanganate detection is significant because of its great biotoxicity. Herein, various carbon quantum dots (CQDs) and the optimized N,S co-doped carbon quantum dots ( NSCDs ) fabricated from the hydrothermal treatment of sulfonated lignin could be used as fluorescent sensors for aqueous MnO 4 − detection. During the synthetic optimization process, compared with the positive effects of sulfonation degree increase of the sulfonated lignin and the proportion of 5-C sulfonation sites on the fluorescence intensity of CQDs, it was found that the increase of lignin molecular weight had the most significant effect on fluorescence intensity. The optimized NSCDs ( NSCDs , N from ethylenediamine, S from sulfonated lignin), with a 1.88 ± 0.37 nm particle size and Stokes shift as large as 245 nm, could emit green fluorescence under UV irradiation with a 21.54 ± 1.93% quantum yield and provide a low detection (LOD) limit of 0.11 μM for the MnO 4 − in an aqueous media with a rapid response within 1 min and good recoveries, showing good agreement with the indirect iodometric method in real water samples. Mechanistic studies suggested that the fluorescence quenching of NSCDs by MnO 4 − is predominantly a static process, likely associated with ground-state interaction between MnO 4 − and the surface functional groups of NSCDs . This work highlights precursor-structure regulation of sulfonated lignin as a distinct route for designing lignin-derived CQD sensors. Download: Download high-res image (117KB) Download: Download full-size image
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OPTICAL MATERIALS
·
2024
·
IF 3.8
Jie Yang,Huimin Du,Yue Deng,Meifang Liu,Xingzuo Liu,Jun Yang,Shanshan Hu
Quantitative detection of permanganate ( MnO 4 ‐ ) and 4-nitrophenol (4-NP) is essential for environmental safety. Fluorescence detection technology is one of the most widely used detection technologies, which can be used for the detection of various anions and organic pollutants. In this paper, Ba 4 Lu 3 F 17 :Tb 3+ phosphors were successfully obtained by hydrothermal method. The morphology transition of Ba 4 Lu 3 F 17 crystal from nanoparticles through octahedron to hexagonal prism was realized in the pH range of 3–11. The best luminescent samples were obtained by changing the type of additives and the doping concentration of Tb 3+ ions. The obtained Ba 4 Lu 3 F 17 :Tb 3+ has high selectivity and anti-interference for MnO 4 ‐ and 4-NP detection, with the detection limits being 0.79 μM and 1.28 μM, respectively.
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MACROMOLECULAR RAPID COMMUNICATIONS
·
2022
·Vol. 43
·期 15
·2200170
·
IF 5.006
Chenxiang Ai,Juntao Tang,Qingqing Zhang,Xincun Tang,Shaofei Wu,Chunyue Pan,Guipeng Yu,Jiayin Yuan
Although considerable efforts have been devoted to novel ionic porous networks (IPNs), the development of them in a scalable manner to tackle the issues in pollutant treatment by adsorption remains an imminent challenge. Herein, inspired by natural spider webs, a knitting copolymerization strategy is proposed to construct analogue triazolium salt-based porous networks (IPN-CSUs). It is not only convenient to incorporate the cationic motifs into the network, but easy to control over the contents of ionic pairs. The as-prepared IPN-CSUs displays a high surface area of 924 m 2 g −1 , a large pore volume of 1.27 cm 3 g −1 and abundant ionic sites, thereby exhibiting fast adsorption rate and high adsorption capacity towards organic and inorganic pollutants. The kinetics and thermodynamics study reveal that the adsorption followed a pseudo-second-order kinetic model and Langmuir isotherm model correspondingly. Specifically, the maximum adsorption capacity of the IPN-CSUs is as high as 1.82 mg mg − 1 for permanganate ions and up to 0.54 mg mg −1 for methyl orange, which stands out among the previously reported porous adsorbents so far. It is expected that the strategy reported herein can be extended to the development of other potential efficient adsorbents in water purifications.
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ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Wenlin Ma,Lihua Pang,Jinhua Liu,Lei Wen,Huili Ma,Yinhui Li,Zhihui Xu,Chengwu Zhang,Hai-Dong Yu
Real-time chemical and biological sensing in vitro is important for application in health and environmental monitoring. Thus, a more rapid and stable detection method is urgently needed. Herein, an immediate-stable real-time fluorescent immunosensor with a high response speed (∼100%, <1 s) and approximately zero steady-state error is constructed. The developed sensor is based on the MnO4–-triggered in situ immediate-stable fluorogenic reaction between dopamine and orcinol monohydrate to produce azamonardine (DMTM). The obtained DMTM is identified and characterized by high-resolution mass spectrometry, 1H NMR spectroscopy, 13C NMR spectroscopy, and theoretical calculations. The present sensor achieves a highly sensitive detection of dopamine (DA) with a limit of detection (LOD) of 10 nM as well as alkaline phosphates (ALP) with an LOD of 0.1 mU/mL by using orcinol monohydrate phosphate sodium salt as a substrate. As a proof of concept, ALP-triggered fluorescence ELISA using cardiac troponin I (cTnI) as a model antigen target is further constructed. The developed real-time sensor achieves the detection of cTnI with an LOD of 0.05 ng/mL. Moreover, the sensor proposed by us is successfully applied to assess the cTnI level in clinical serum specimens and yields results consistent with those obtained by the commercial ELISA method. The immediate-stable real-time fluorescence immunosensor provides a promising and powerful platform for the trace detection of biomolecules in clinical diagnosis.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yipeng Yang,Chao Wang,Jiuyang Lin,Liqin Zhong,Yinhua Wan,Xuewei Li
Efficient removal of trace thallium (Tl) from rare-earth mine tailwater remains challenging because conventional precipitation and monofunctional adsorption often provide insufficient purification and may cause secondary metal release. Herein, a permanganate-intercalated Mg Al layered double hydroxide (LDH-MnO 4 ) was synthesized via a calcination-reconstruction strategy. The material reached removal equilibrium within 30 min and exhibited a Langmuir-derived maximum Tl uptake capacity of 426.99 mg/g. The combined XPS, XRD, TEM, Raman, and Mn K-edge XAFS analyses indicated a removal mechanism that was dominated by interlayer-confined oxidation-precipitation and supplemented by surface complexation. Interlayer MnO 4 − promoted Tl(I) oxidation to Tl(III) and was converted into lower-valence MnO x species. LDH-MnO 4 maintained high Tl(I) removal efficiency over pH 5–7 and achieved 99.59% removal from actual rare-earth mine tailwater containing 6.87 μg/L Tl at a dosage of 50 mg/L. Meanwhile, the dissolved Mn concentration showed a net decrease from 3.60 to 0.35 mg/L under the tested tailwater conditions. The preliminary direct-reagent cost was estimated at 1.51 CNY/m 3 under the tested conditions, supporting further evaluation of LDH-MnO 4 for trace Tl removal from rare-earth mine tailwater.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Tiancheng Sun,Sue Hao,Ruiqing Fan,Jian Zhang,Wei Chen,Ke Zhu,Ping Wang,Xikui Fang,Yulin Yang
Developing portable membrane sensors to accurately detect the biomolecule ascorbic acid (AA) is extremely important for food safety and human health. Herein, we successfully design and synthesize a novel cationic metal organic framework (Eu-pbmc, Hpbmc = 2-(pyridine-2-yl)-1H-benzimidazole-5-carboxylic acid) and assemble polyacrylonitrile/Eu-pbmc membrane (PEM) by an in-situ growth strategy. Benefiting from the appreciable loading of Eu-pbmc nanoparticles and high water permeation flux, PEM possesses effective detection for MnO 4 − with a limit of detection (LOD) of 17 nM. Utilizing the cationic porous framework, we load MnO 4 − into PEM and construct a “on-off-on” system for effective AA detection. The oxidative MnO 4 − can be reduced by AA and the resulting turn-on luminescence can reflect the concentration of AA. Compared with pure Eu-pbmc crystals, PEM exhibits improved AA detection performance with LOD of 48 nM and detection time of 1 min via a concise detection operation. The stable membrane sensor realizes an accurate detection in real biological samples, meeting the practical requirement. Moreover, an IMP logic gate is helpful to analyze MnO 4 − and AA in water. The proposed novel luminescence platform as well as reasonable “on-off-on” luminescence mode provide a promising method for AA detection.
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高影响因子
CHEMICAL PAPERS
·
2025
·
IF 2.5
Jing Xuejiao,Song Li,Wu Changxin
Developing carbon dots as a fluorescent probe specifically for detecting residual permanganate ion (MnO 4 − ion) in water is crucial for effective environmental water quality monitoring. In this study, nitrogen-doped carbon dots (N-CDs) were successfully synthesized using purslane as a green precursor and ortho-phenylenediamine (OPD) as a nitrogen source via a simple one-step hydrothermal method. These N-CDs exhibited a maximum emission wavelength of 486 nm when excited at 358 nm. They demonstrated significant antioxidative properties in various concentrations of H 2 O 2 and showed high photostability and resistance to photobleaching under different pH, ionic strength, and UV irradiation conditions. Furthermore, the N-CDs were validated as highly selective and sensitive fluorescence sensors for MnO 4 − ion, demonstrating a linear relationship within the concentration range of 0.5–168 uM with a detection limit of 41.8 nM. The sensor successfully detected MnO 4 − ion in spiked tap and river waters, achieving satisfactory recovery.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2026
·
IF 3.2
Weiwei Cheng,Shuyue Xu,Chengnan Wang,Jinyi Dong,Weina Jiang,Yunshan Xue
Industrial emissions of heavy metal ions and oxygen-containing anions, antibiotic residues caused by pharmaceutical and agricultural activities, and toxic ions such as Fe 3+ introduced by nuclear industry leaks, collectively form a complex water pollution. Here, we report the successful synthesis of a novel europium-based metal-organic framework (Eu-MOF) through a hydrothermal approach employing a flexible V-shaped dicarboxylic acid ligand. The single crystal X-ray diffraction results indicate that the Eu-MOF belongs to the orthorhombic crystal system. Its basic structural unit is a one-dimensional coordination chain, which is further assembled by hydrogen bonding and π - π stacking between molecules, ultimately forming a stable three-dimensional supramolecular structure. Leveraging the intense red emission of Eu 3+ and its robust structural integrity, the Eu-MOF demonstrates remarkable sensitivity and specificity in the fluorescence detection of Fe 3+ , MnO 4 − , and nitrofurantoin (NFT) in aqueous solutions, featuring low detection limits and substantial quenching constants. Mechanism studies have shown that the structure of the material remains stable during the sensing process, and fluorescence quenching is mainly caused by the combined effects of static quenching, competitive absorption, and photo-induced electron transfer. This research introduces a dependable multifunctional luminescent platform for the swift and precise monitoring of various hazardous environmental contaminants.
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2021
·
IF 4.094
Wudong Liu,Jie Zhang,Xiangbiao Yin,Xinyi He,Xinpeng Wang,Yuezhou Wei
Through a simple hydrothermal reaction , LEuH-Cl (where LEuH and Cl denote layered europium hydroxide and a chlorine ion, respectively) was synthesized. Its structure and properties were similar to those of layered double hydroxides (LDHs). The material was composed of europium hydroxide host layers with a positive charge and a guest interlayer with chlorine ions. The hydrotalcite-like structure gives it excellent anion exchange abilities, and the host shows an intense photoluminescence (PL), mainly through 5 D 0 → 7 F J (J = 0,1,2,3, and 4). MnO 4 − or Cr 2 O 7 2− can be directly adsorbed by LEuH-Cl in an aqueous solution due to the large number of exchangeable chlorine ions, thereby resulting in a static quenching effect (SQE) and forming an inner filter effect (IFE) system, which leads to the direct quenching of the PL intensity. Based on this characteristic, the concentration of these two substances in an aqueous solution can be detected quickly and simply. Based on the experimental results, LEuH-Cl exhibited high selectivity and sensitivity toward MnO 4 − and Cr 2 O 7 2− in an aqueous solution. The detection limits of MnO 4 − and Cr 2 O 7 2− were calculated to be 3.43 and 1.19 μM, respectively. This proved the feasibility of using the material for the direct detection of multiple substances. The quenching caused by the anion exchange of layered rare-earth hydroxides (LRHs) was further explored.
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LUMINESCENCE
·
2026
·Vol. 41
·期 9
·e70613
·
IF 2.8
Dajie Zou,Chenyan Lu,Huye Li,Xiaohua Xu,Min Ma,Chengdangzhi Wen,Huan Wang,Jiuli Wang
Dopamine hydrochloride (DPH) is a key neurotransmitter, and its dysregulated concentration has been linked to various neurological disorders. Meanwhile, potassium permanganate (MnO 4 − ), a potent oxidant, poses significant environmental risks when discharged in excess. Therefore, sensitive detection of MnO 4 − and DPH is essential. In this work, nitrogen, sulfur, and fluorine tridoped carbon dots (N,S,F-CDs) were prepared through a hydrothermal route using Aconitum pendulum Busch extract as a biomass-derived carbon source, with thiourea and sodium fluoride serving as heteroatom dopants. The obtained N,S,F-CDs exhibited bright blue emission, good aqueous dispersibility, and a fluorescence quantum yield of 43.16%, with strong emission at 408 nm under 345-nm excitation. Upon addition of MnO 4 − , the fluorescence was efficiently suppressed owing to the combined contribution of inner-filter effect and dynamic quenching. Subsequent introduction of DPH reduced MnO 4 − and recovered the fluorescence signal, enabling the construction of an “ON–OFF–ON” sensing platform. Under optimized conditions, the sensor displayed linear responses of 5.03–275.23 μM for MnO 4 − and 6.11–371.02 μM for DPH, with detection limits of 0.25 and 0.68 μM, respectively. The method was further applied to tap water, serum, and orange juice samples with satisfactory recoveries, indicating its potential for environmental and bioanalytical detection.
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