SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yabin Wang,Ronghao Wang,Xiuping Ding,Hua He
Hexavalent chromium has seriously destroyed the natural environment and threatened human health. It is crucial but still challengeable to dispose of Cr(VI) handily and recycle the as-generated Cr-based byproducts. Herein, on the one hand, we demonstrate a feasible strategy for cyclic utilization of Cr(VI) species by converting them from toxic to trash and further to treasure. Multiamino-functionalized dendritic mesoporous silica nanoparticles (DMSNs) can adsorb chromium oxyanion ions (HCrO 4 − and Cr 2 O 7 2– ) and in situ reduce Cr(VI) to Cr(III). The as-obtained DMSNs-Cr(III) function as supported catalysts and efficiently catalyze some cross-coupling reactions. On the other hand, pore-size-dependent adsorption of HCrO 4 − and Cr 2 O 7 2− has been realized by regulating DMSNs’ channel size. Furthermore, pore-size-dependent adsorptive and catalytic performances have been demonstrated as well. Our results not only provide a blueprint for cyclic utilization of Cr(VI) in sewage, but also exhibit a versatile DMSNs-based platform that couples with potential structure–activity correlations.
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高影响因子
INORGANICA CHIMICA ACTA
·
2022
·
IF 3.118
Zong-Ying Li,Hong-Xia Zhang,Tian-Sheng He,Hong-Xin Jiang,Xiao-Wei Liu,Li-Na Zhu,Xiao-Zeng Li,De-Ming Kong
A two-dimensional (2D) water-stable Cd (II) luminescent coordination polymer ( 1 ), namely {[CdLCl 2 ]} n , was obtained through assembly of a new 2-deoxy- d -ribose derivative ligand (L) with CdCl 2 , 1 showed high stability in water. Further investigation showed that 1 can be used as luminescent probe for the organoarsenic compound Roxarsine (ROX) with high selectivity and sensitivity, high quenching constants (K SV = 2.34 × 10 4 M −1 ), low limits of detection (LOD) (0.16 μM) and good recyclability in aqueous media. In addition, this luminescent probe can detect some inorganic harmful ions (Fe 3+ , Cr 2 O 7 2− and CrO 4 2− ) with excellent versatility. The detection mechanism was proved that the quenching was caused by competitive absorption and resonance energy transfer effect between 1 and analytes. More strikingly, a simple 1 -based test strip was developed owing to the quick response and recyclability of 1 , which shows visible quenching signals under UV light even when analytes concentrations are as low as 5 μM. This work has provided an effective method for the design of multifunctional CP luminescent sensors for pollutants detections in aqueous media.
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高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 30
·10584-10593
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IF 4
Xue Wen,Wenjun Zhang,Cong Ding,Zhongfa Li,Chengyue Xin
Metal–organic frameworks (MOFs) are a unique class of multifunctional hybrid crystals that have been successfully utilized in diverse ranges of applications. However, since MOFs are prone to aqueous degradation, the development of stable luminescent MOF platforms in aqueous media is still a huge challenge. Here, a novel dual-ligand Eu3+/DUT-52-COOH composite is prepared based on the luminescent DUT-52 prototype structure via a dual-ligand strategy and a post-synthetic modification (PSM) method. The functionalized Eu3+/DUT-52-COOH material exhibits dual emission and good photothermal stability in aqueous media. Thus, Eu3+/DUT-52-COOH is developed as a ratiometric luminescent sensor to achieve highly selective and sensitive detection of Cu2+ and Cr2O72− in aqueous solutions and has a low detection limit of 3.43 μM and 25.7 nM, respectively. This work is one of the few cases of detecting Cu2+ and Cr2O72− in aqueous media based on a DUT-52, and the detection signals can be observed by the bare eye without using sophisticated analytical instruments. The possible sensing mechanism is discussed in detail. The results obtained in this project may provide broad prospects for developing smart sensing systems to accomplish highly efficient, easily operable and quantitative intelligent recognition of Cu2+ and Cr2O72−.
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PubMed
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 24
·3167-3175
·
IF 2.6
Meifang Liu,Yue Jiang,Huimin Du,Ziwei Zou,Mengtan Ye,Jingyu Chen,Hanying Ren,Jun Yang,Shanshan Hu
Chromium is a common heavy metal element that is harmful to the ecosystem as well as human health, so sensitive detection of chromium ions in solution is important for life and health. In this paper, a series of Eu3+-doped KBi3F10 fluorescent powders were successfully synthesized by a one-step solvothermal method for the selective detection of Cr3+, CrO42− and Cr2O72− ions in an aqueous solution. When adjusting the pH value to 3 and adding PVP as an additive, the obtained KBi3F10:12%Eu3+ phosphor showed excellent red luminescence. Due to the competitive absorption and the inner filter effect of Cr3+, CrO42− and Cr2O72− ions, the red emission from Eu3+ ions produces fluorescence quenching, which can be used to detect them with good selectivity. And the detection limits are as low as 0.19 μM, 0.38 μM and 0.094 μM for Cr3+, CrO42− and Cr2O72− ions, respectively. Other metal ions and common anions showed little interference with chromium ion detection. The obtained fluorescent probe has good recyclability, accurate and reliable detection results, simple operation and low cost and is easy to promote, which make it an excellent three-in-one probe for chromium detection.
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INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Hong-Mei Chai,Jia-Ling Yan,Gang-Qiang Zhang,Jia-Xing Wang,Yi-Xia Ren,Lou-Jun Gao
When a multicarboxylate aromatic ligand, 3,5-di(2′,4′-dicarboxylphenyl)benzoic acid (H5L), was employed, five structurally similar lanthanide metal–organic frameworks (Ln-MOFs), {[Pr10L6(OH)3Cl(H2O)6]·4C2H8N}n (1), {[Nd10L6(OH)4 (H2O)9]·4C2H8N}n (2), {[Gd10L6(OH)4(H2O)3]·4C2H8N}n (3), {[Ho10L6(OH)4 (H2O)3]·4C2H8N}n (4) and {[Er10L6(OH)4(H2O)6]·4C2H8N}n (5), were synthesized and characterized. Single-crystal X-ray structural analyses disclosed that all five Ln-MOFs crystallize in the trigonal R3 space group. They have three-dimensional mesoporous structure featuring the coexistence of binuclear and tetranuclear species as inorganic building units. The mesoporous structure of 3 was verified by the gas adsorption experiment of N2. Fluorescence analysis showed that 3 can selectively detect Fe3+, Cr2O72–, and H2O2; furthermore, it can be used for the electrochemical detection of trinitrophenol. With the merit of an excellent highly sensitive detection performance, 3 has unpredictable application prospects in future research fields.
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PubMed
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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高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2018
·
IF 1.703
Yu Wu,Yun Huang,Yulan Wang,Xiang Zou,Jun Wang,Weiping Wu
Developing a fast and sensitive method for the detection of 2,4,6-trinitrophenol (TNP) or Cr2O72– in aqueous solution has received great attention. In this work, a regenerable fluorescent coordination polymer [Zn(L)(H2L)]n (1) has been successfully constructed using a novel Schiff base ligand N'-[(E)-(3,5-dibromo-2-hydroxyphenyl)methylene]isonicotinohydrazide(H2L) and exploited as a dual detection probe for the selective sensing of Cr2O72– and TNP in water media. Competitive fluorometric experiments involving mixtures of anions or nitro compounds demonstrated 1 as an efficient and selective sensor for both Cr2O72– and TNP. The limits of detection for Cr2O72– and 2,4,6-trinitrophenol in aqueous solutions were found to be 11.4 and 1.19 μM, respectively. Moreover, 1 can detect TNP and Cr2O72– in real water samples. All these features clearly demonstrate its great potential of practical TNP and Cr2O72– detection in water media for public safety and security.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Zhaochuan Yu,Chao Deng,Shan Jiang,Yuqian Liu,Chao Liu,Farzad Seidi,Xing Zhang,Yang Huang,Weibing Wu,Jingquan Han,Qiang Yong,Huining Xiao
Dichromate ion (Cr 2 O 7 2− ) is a highly toxic chromium-containing compound that poses significant hazards to the digestive, respiratory systems, skin, and mucous membranes. Currently, the detection and adsorption of Cr 2 O 7 2− face significant challenges, including the time-consuming and low sensitivity nature of traditional analytical methods. The limited efficiency and capacity of existing adsorbents hinder their practical application in real-time water quality monitoring and environmental remediation. Herein, using polyethyleneimine-functionalized (PEI) pulp fiber paper as the substrate, we developed smart paper-based materials (designated as NB-MQDs@PP) incorporated with nitrogen and boron co-doped MXene quantum dots (NB-MQDs) for rapid adsorption and sensitive detection of Cr 2 O 7 2− . Compared to undoped MQDs, NB-MQDs exhibited longer excitation wavelength and enhanced oxidation stability. As anticipated, NB-MQDs achieved rapid (response time of 10 s) and sensitive (detection limit of 1.2 μM) recognition of Cr 2 O 7 2− within a wide pH range with a quenching efficiency of 99.9%. Simultaneously, two on-site detection methods, immersion and cyclic filtration, were constructed based on NB-MQDs@PP. The detection limit of the immersion method was 17.0 nM, while the cyclic filtration method had a detection limit as low as 3.8 nM, surpassing the majority of those reported literatures. Remarkably, NB-MQDs@PP exhibited outstanding enrichment capacity towards Cr 2 O 7 2− , with an adsorption capacity of up to 162.4 mg/g. This work provides a novel strategy for creating unique paper-based materials with excellent capture and monitoring dual-function, which can be customized according to the requirements of various application scenarios.
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PubMed
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 24
·期 7
·1358-1367
·
IF 3.545
Yin-Xia Sun,Geng Guo,Wen-Min Ding,Wen-Yu Han,Juan Li,Zhe-Peng Deng
Heavy metal ions are common pollutants in water pollution. Amino acids, as important substances in organisms, participate in many life activities. The detection of heavy metal ions and amino acids with high selectivity and sensitivity is important. Therefore, based on H3L (H3L = 4,4′,4′′-triazine-2,4,6-tribenzoic acid) and Eu3+, an Eu-MOF was designed, synthesized and characterized. Single crystal structure analysis showed that the Eu-MOF was crystallized in the orthorhombic space group Fddd, and presents a three-dimensional (3D) porous network structure. The luminescence results show that the Eu-MOF has good luminescence stability. As a multifunctional luminescent sensor, the Eu-MOF can detect Fe3+, Cr2O72−, CrO42− and aspartic acid (Asp) in water systems with high sensitivity and selectivity, and the lowest detection limit (LOD) was 1.12 × 10−6 mol L−1, 1.95 × 10−6 mol L−1, 1.89 × 10−6 mol L−1 and 2.20 × 10−6 mol L−1, respectively. These results indicated that the Eu-MOF has potential application prospects in the detection of Fe3+, Cr2O72−, CrO42− and Asp in water.
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高影响因子
Analytical Methods
·
2025
·
IF 2.6
Nanhai Zhang,Deyan Liu,Rui Zhang,Qinghe Song,Guangjun He,Shixing Wang,Libo Zhang
The design and preparation of fluorescent sensors for detecting toxic ions in aqueous environments are of paramount importance. In this study, a europium metal–organic framework (Eu-MOF), constructed from Eu3+, the rigid 2,2′-biphenyldicarboxylic acid (2,2′-H2bpdc) ligand, and the auxiliary 1,10-phenanthroline (Phen) ligand, was synthesized through hydrothermal synthesis. The synthesized Eu-MOF demonstrated remarkable water stability, pH stability, thermal stability, and photostability. It showed a high quantum yield of 42.6%, along with an average fluorescence lifetime of 0.9002 ms, which could enhance its sensitivity when employed as a fluorescent probe. The Eu-MOF could function as a fluorescent probe to quantitatively detect trace amounts of Fe3+, CrO42− and Cr2O72− via fluorescence quenching. Their detection sensitivities are 1.527 × 104 M−1, 1.378 × 104 M−1 and 1.463 × 104 M−1 respectively, with detection limits as low as 0.28 μM, 0.19 μM and 0.09 μM. Additionally, the Eu-MOF sensor exhibited excellent selectivity, anti-interference ability, repeatability (after undergoing five cycles) and practical feasibility. Furthermore, a detailed investigation of its fluorescence properties and sensing mechanisms was carried out. Based on density functional theory calculations, two energy transfer pathways in the process of Eu3+ ion luminescence sensitized by the double ligands 2,2′-H2bpdc and Phen were identified. The fluorescence sensing mechanism of the Eu-MOF for detecting Fe3+, CrO42− and Cr2O72− involved photoinduced electron transfer from the antenna ligand to the organic molecules and competitive absorption of excitation energy. Owing to its high stability and sensitivity, the Eu-MOF holds great potential for practical applications as a sensor for Fe3+, CrO42− and Cr2O72− in aqueous environments.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Lie Zou,Yangping Wen,Hui Zhang,Jingdang Chai,Xuemin Duan,Liang Shen,Ge Zhang,Jingkun Xu
A fluorescent sensor based on the electrosynthesized conjugated polymer poly(Fmoc- l -serine) ( PFOLS ) for highly sensitive analysis of Cr 2 O 7 2− at ultra-trace levels in water and agro-product samples was reported. PFOLS was obtained by potentiostatical electropolymerization of corresponding monomer Fmoc- l -serine in CH 2 Cl 2 -boron trifluoride diethyl etherate system. The introduction of serine group in PFOLS efficiently avoided the interference of anions and other acid substances in agro-products. Although metal ion Fe 3+ could also quench the fluorescence of PFOLS , EDTA could recover the fluorescence of PFOLS -Fe 3+ system. So in the presence of EDTA, PFOLS had a high-selectivity to Cr 2 O 7 2− and it could detect Cr 2 O 7 2− in linear ranges of 80 pM to 1.95 mM with a low detection limit of 72 pM. Then PFOLS was used to detect Cr 2 O 7 2− in water samples (tap water, lake water, and wastewater) and agro-product samples (white rice, red rice, and black rice) with satisfactory results, revealing that PFOLS could be as a practical sensing platform for ultra-trace analysis of Cr 2 O 7 2− in environment and agro-product samples.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Yan Fan,Xueqin Sun,Wenyuan Zhang,Jiacheng Liu
A novel fluorescent sensor material of Eu 3+ @ Citric acid-functionalized UiO-66 (denoted as Eu 3+ @UiO-66-CA) was prepared successfully via a two-step post synthetic modification towards UiO-66. The as-obtained Eu 3+ @UiO-66-CA presented the characteristic emission of Eu 3+ ions (λ ex = 270 nm), which could be used for rapidly detecting Fe 3+ and Cr 2 O 7 2- ions by luminescence quenching in aqueous solution. The detection process for Fe 3+ ion (detection limit, 18.1 μ M) and Cr 2 O 7 2- ion (detection limit, 8.5 μ M) exhibited the high selectivity and excellent anti-interference ability. Systematic investigations were employed to make clear the mechanism of fluorescence quenching after adding Fe 3+ and Cr 2 O 7 2- ions. Moreover, the Eu 3+ @UiO-66-CA was also used for the determination of Fe 3+ and Cr 2 O 7 2- ions in the Yellow River and tap water.
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高影响因子
危险品化学品经营许可证（带存储）