MICROCHIMICA ACTA
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2025
·Vol. 192
·期 4
·1-12
·
IF 5.3
Zhou Xiayu,Wang Yue,Song Jiayi,Xiong Lihao,Zhao Xin,Chen Sihan,Zhao Weichao,Li Le,Zhen Deshuai
Three types of carbon dots were synthesized using the same precursor (folic acid and europium nitrate) via different preparation methods (doping and direct coordination). A comprehensive comparison and analysis of the morphology, surface groups, and optical properties of the prepared carbon dots (CD), europium-doped carbon dots (CD-Eu), and europium-functionalized carbon dots (CD@Eu) were conducted. Moreover, due to the higher quantum yield, excellent stability, and outstanding selectivity for UO 2 2+ exhibited by CD-Eu, we selected CD-Eu as the probe for subsequent applications. CD-Eu showed a sensitive response to UO 2 2+ within the concentration range 25 ~ 200 nM, with a detection limit of 0.84 nM (0.42 μg·L −1 ). Additionally, CD-Eu demonstrated excellent accuracy and recovery in spiked detection of real water samples. Furthermore, we discovered that this probe could detect UO 2 2+ both in vitro and in viv o. This strategy provides a promising fluorescent sensor for the detection of UO 2 2+ in water and biological samples, holding significant implications for addressing UO 2 2+ contamination issues. Graphical abstract
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 110
·108662-108667
·
IF 3.289
Jin-Xiu Cao,Yong-Sheng Wang,Jin-Hua Xue,Yan-Qin Huang,Ming-Hui Li,Si-Han Chen,Bin Zhou,Xian Tang,Xiao-Feng Wang,Yu-Feng Zhu
We report on a novel and highly sensitive strategy for UO22+ detection. The designed single-labeled hairpin signal probe (SSP) was employed as a reporter, and a multipurpose RNA-cleaving DNAzyme as a target recognition element, catalytic DNAzyme and the primer of substrate fragment recycling amplification. The presence of UO22+ results in the substrate strand in DNAzyme being cleaved at the RNA site, releasing short substrate fragments. The fragment that is complementary partially with SSP could open the hairpin of SSP to form a double-stranded DNA with recessed 3′-termini, which could be selectively digested by exonuclease III. After the double-stranded DNA is fully consumed, the substrate fragment is released. This one could hybridize with another SSP to initiate the next round of digestion by exonuclease III. The recycling of substrate fragments can be repeated multiple times, resulting in the accumulation of the more 6-carboxyfluorescein in the solution along with an amplified fluorescence signal. By this strategy, we achieved hitherto an unreported UO22+ detection limit of 2.4 pM. Therefore, this novel exonuclease III-amplified strategy has great potential for highly sensitive and selective quantification of UO22+ in biomedical research and environmental science fields.
研究领域:
生物化学
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环境科学
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分析化学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2021
·
IF 4.098
Linshan Zhang,Deshun Huang,Pengxiang Zhao,Guozong Yue,Luming Yang,Weihua Dan
A simple and portable colorimetric sensor for colorimetric detection of UO 2 2+ in aqueous solution based on vinylphosphonic acid functionalized gold nanoparticles (VPA-AuNPs) has been developed. The VPA-AuNPs solution was prepared by sodium borohydride reduction in the presence of vinylphosphonic acid. The addition of UO 2 2+ would induce aggregation of VPA-AuNPs, resulting in the color change from wine-red to blue, and red-shift of the ultraviolet–visible (UV–vis) spectra. The UO 2 2+ assay based on VPA-AuNPs showed good selectivity and sensitivity, with a limit of detection to be approximately 2.0 μM by naked eyes and 1.07 μM by UV–vis (S/N = 3) respectively. Additionally, a smartphone with a free application named “ PhotoMetrix ” was employed to estimate the color intensities (red, green, blue value) of VPA-AuNPs in the presence of UO 2 2+ with different concentrations, and the concentration of UO 2 2+ samples could be conveniently exported by the calculated univariate calibration curves . This method shows good feasibility for on-site UO 2 2+ detection in an aqueous solution.
研究领域:
分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2015
·
IF 4.097
Xiao-Hong Cao,Hao-Yan Zhang,Ru-Chao Ma,Qian Yang,Zhi-Bin Zhang,Yun-Hai Liu
A simple and selective colorimetric sensor based on o-phosphorylethanolamine-functionalized gold nanoparticles (OPA–Au NPs) as an optical probe has been developed for the detection of UO 2 2+ . OPA–Au NPs rapidly aggregate in the presence of UO 2 2+ , thereby causing a visual color change from red to blue, which is easily detectable by eye. The proposed sensing system possesses a selective response for UO 2 2+ over other heavy metal ions. The current method shows application potential for UO 2 2+ detection in real water samples.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2021
·
IF 4.821
Ming Zheng,Qiang Yin,Dongyuan Wang,Zixuan Zhao,Qinghua Hu,Hongqing Wang
Uranium mining, refining and spent fuel reprocessing are mostly carried out in an acidity and high water ratio environment. But there are currently fewer fluorescent probes that can meet this requirement. For this purpose, it is a urgent problem to design and synthesis fluorescent sensor for detection of uranium in these conditions. A novel triphenylamine-based fluorescent sensor (USC-001) has been design and prepared for the detection of uranyl ions in acidic and high water ratio environments and biologic samples. And even though the concentration of other metal ions is 5 times higher than that of uranyl ions, the probe is still have good selectivity to UO 2 2+ . In addition, a large number of auxiliary simulation calculations and experiment not only reveal the mechanism of the influence of water ratio on the change of the fluorescence spectrum , but also propose the mechanism and coordination mode of USC-001 for identifying UO 2 2+ . Furthermore, USC-001 has been successfully used to detect uranyl ions in actual water samples and biological cells.
研究领域:
化学
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生物学
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环境科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Weisong Zhao,Hong Chi,Xue Zhang,Yaoguang Wang,Tianduo Li
The emerging two-dimensional material MXene is widely used in metal ions adsorption. However, among the various modification strategies of MXene , the study on the synergistically effect of linear natural polymer and nano-sized particles and their interaction mechanism remains unclear. In this work, polyhedral oligomeric silsesquioxane (POSS-OH) and hydroxypropyl cellulose (HPC) were grafted onto Ti 3 C 2 T x MXene , producing chemically stable HPC/Ti 3 C 2 T x /POSS-OH (CHMP) with adjustable interlayer space. Under the synergistic interaction, the CHMP exhibited obviously increased kinetics, high selectivity and good repeatability towards the adsorption of uranium ions (UO 2 2+ ). The adsorption capacity of CHMP has been increased by 35.08%. In addition, X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscope (HR-TEM) indicated high chemical stability of CHMP. Langmuir isotherm model suggested that the adsorption mechanism of CHMP on UO 2 2+ was the single-layer adsorption coordinated with oxygen-containing functional groups. The maximum adsorption capacity of CHMP was 307.67 mg g −1 . Furthermore, XPS and simulation results suggested that the adsorption mechanism of UO 2 2+ was both strong coordination binding with hydroxyl groups and electrostatic interaction .
研究领域:
材料科学
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环境科学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 5
·1-9
·
IF 6.232
Cao Chen,Liu Jinquan,Tang Shuangyang,Dai Zhongran,Xiao Fubing,Rang Weiqing,Liu Ling,Chen Tuo,Yuan Yali,Li Le
A superior electrochemical biosensor was designed for the determination of UO 2 2+ in aqueous solution by integration of DNAzyme and DNA-modified gold nanoparticle (DNA-AuNP) network structure. Key features of this method include UO 2 2+ inducing the cleavage of the DNAzyme and signal amplification of DNA-AuNP network structure. In this electrochemical method, the DNA-AuNP network structure can be effectively modified on the surface of gold electrode and then employed as an ideal signal amplification unit to generate amplified electrochemical response by inserting a large amount of electrochemically active indicator methylene blue (MB). In the presence of UO 2 2+ , the specific sites on DNA-AuNP network structure can be cleaved by UO 2 2+ , releasing the DNA-AuNP network structure with detectable reduction of electrochemical response intensity. The electrochemical response intensity is related to the concentration of UO 2 2+ . The logarithm of electrochemical response intensity and UO 2 2+ concentration showed a wide linear range of 10~100 pM, and the detection limit reached 8.1 pM (S/ N = 3). This method is successfully used for determination of UO 2 2+ in water samples.
Fabricated DNAzyme network structure for enhanced electrical signal. Numerical experiments show that the current signal decreases as the concentration of UO 2 2+ increases. It can be seen that the biosensors could be used to detect UO 2 2+ in aqueous solution effectively.
研究领域:
生物化学
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环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2017
·
IF 3.743
Xiaofeng Yi,Jiarui He,Yingyuan Guo,Zhenhua Han,Meixia Yang,Jiali Jin,Junjie Gu,Minrui Ou,Xiaoping Xu
The aim of this work was to study the removal of Cu (II) and U (VI) ions from aqueous solutions by encapsulating magnetic Fe 3 O 4 nanoparticles into calcium alginate coated chitosan hydrochloride (CCM) hydrogel beads. ATR-FTIR and XRD analysis data indicated that the CCM composites were successfully prepared. SEM images and EDX spectra showed that Cu 2+ and UO 2 2+ ions were adhered onto sorbents . Adsorption properties for removal of both copper and uranium ions under various experimental conditions were investigated. Kinetic data and sorption equilibrium isotherms were also conducted in batch process . The sorption kinetic analysis revealed that sorption of Cu (II) and U (VI) followed the pseudo-second-order model well and exhibited 3-stage intraparticle diffusion model during the whole sorption process. Equilibrium data were best described by Langmuir model, and the CCM composite hydrogel beads showed the estimated maximum adsorption capacity 143.276 mg/g and 392.692 mg/g for Cu (II) and U (VI), respectively. The CCM adsorbent exhibited excellent reusability for five cycles use without significant changes in the adsorption capacity and structural stability. The results demonstrated that CCM can be an effective and promising sorbent for Cu (II) and U (VI) ions in wastewater.
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
PubMed
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 9
·1920
·
IF 4.6
Suming Zhang,Siyu Wu,Cheng Zhang,Doudou Cao,Yingbo Song,Yue Zheng,Jiarui Cao,Lu Luo,Yajie Yang,Xiangjun Zheng,Ye Yuan
Uranium plays an important role in the modern nuclear industry. However, such a radioactive element can also cause severe damage to the environment once leaked or discharged into water or air, having a huge impact on the safety of the biosphere. In this work, we pioneered the use of fluorescent monomers as imprinted units, which promoted fluorescence emission of the material. A novel porous aromatic framework was obtained with uranyl ion chelating sites, namely MIPAF-15. The unique N-O chelating pockets on the 4-bromo-1-H-indole-7-carboxylic acid gave rise to high coordination affinity toward uranyl ions, which enabled the fast adsorption rate of uranyl ions and a uranyl ion adsorption capacity of 44.88 mg·g−1at 298 K with an initial pH value of 6.0 and the uranyl concentration of 10 ppm. At the same time, the fluorescence quenching effect of MIPAF-15 was observed upon its adsorption of uranyl ions, which allowed the selective detection of uranyl ions with a detection limit of 5.04 × 10−8M, lower than the maximum concentration of uranyl ions in drinking water specified by the World Health Organization (6.30 × 10−8M) and United States Environmental Protection Agency (1.11 × 10−7M). This kind of multifunctional porous material produces a favorable pathway for the detection, removal and degeneration of highly pollutive ions, promoting the overall sustainable development of the natural environment.
研究领域:
材料科学
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环境科学
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放射化学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2016
·
IF 3.299
Xinrui Zhang,Liyong Yuan,Zhifang Chai,Weiqun Shi
A novel tetradentate ligand combining hard O-donor and soft N-donors in the same molecule, N,N′-diethyl-N,N′-ditolyl-2,9-diamide-1,10-phenanthroline (Et-Tol-DAPhen), was developed in our laboratory aiming at the group separation of actinides from lanthanides. Herein, the solvent extraction of UO 2 2+ by Et-Tol-DAPhen in 1-(trifluoromethyl)-3-nitrobenzene diluent was investigated in detail. The effects of contact time, Et-Tol-DAPhen concentration, acidity, and competing ions on the extraction were discussed, the extracted UO 2 2+ speciation was analysed, and the stripping of UO 2 2+ from organic phase was performed. The results clearly show that Et-Tol-DAPhen/1-(trifluoromethyl)-3-nitrobenzene provides a highly efficient extraction of UO 2 2+ from HNO 3 media with a fast extraction kinetics of less than 5 min and a large distribution ratio of more than 300. Moreover, the system shows excellent selectivity toward UO 2 2+ over Ln 3+ in a wide acidity range. Stripping experiments indicate that almost a complete back extraction of UO 2 2+ could be achieved via only one stage operation using 5% Na 2 CO 3 solution. Findings of the present work provide new data for assessing the feasibility of Et-Tol-DAPhen, as well as other new ligand with hard–soft donors combined in the same molecule, applied in the group separation of actinides over lanthanides.
研究领域:
化学
·
核化学与放射化学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Jin Wang,Fa Fang,Yuchen Zhou,Meiling Yin,Juan Liu,Jinwen Wang,Yang Wu,Jingzi Beiyuan,Diyun Chen
Graphene oxide (GO) has been proved with favorable affinity to U(VI), while some drawbacks such as poor dispersity and low adsorption performance limit its application. Herein, cetyltrimethylammonium bromide (CTAB) modified graphene oxide (MGO) composites were successfully fabricated, characterized and compared with graphene oxide (GO) in the sequestration of U(VI) in aqueous solutions. The results showed that maximum adsorption rate of MGO (99.21%) was obviously higher than that of GO (66.51%) under the same initial condition. Simultaneous introduction of C–H and N O coupled with the enhanced dispersity of GO after modification were mainly responsible for the updated performance verified with multiple characterization techniques. Based on the results of kinetics and isotherms investigations, the experimental data were best described by Pseudo-first-order kinetic model and Redlich-Peterson isotherm model. The results of Δ H , Δ S and Δ G show that adsorptive behaviors of uranyl ion on MGO are endothermic and spontaneous. The study provides a feasible alternative to the chemical modification of GO and enhancing the performance towards uranyl ion removal from solution.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Sheng Deng,Chunxue Yu,Junfeng Niu,Jianbo Liao,Xinhui Liu
In the present study, a phosphorylated polyacrylonitrile (PAN) fiber adsorbent was rapidly prepared with microwave (MW) assisted method and further applied to capture U(VI) ions from aqueous solution. FTIR and SEM/EDS characterizations confirmed the satisfactory grafting of phosphonic group on the surface of PAN fiber and the integrities of fiber were well preserved. The results indicated that MW assisted method exhibited much higher efficiency during the modification process in terms of shorter reaction time and higher phosphonic content as compared to conventional heating method. The physical property of the modified fiber was well maintained according to TGA/DTA results. The kinetic and isothermal adsorption experiments confirmed that the uptake process of PAN MW -Phos fibers for U(VI) followed both pseudo-second-order and Langmuir model, indicating that the adsorption process was controlled by chemisorption mechanism. The maximum adsorption amount for prepared adsorbent towards U(VI) reached at 241.4 mg/g based on the Langmuir calculation, which was relatively higher than other fibrous adsorbent. Moreover, the functional fiber (PAN MW -Phos) revealed selective adsorption ability for U(VI) from solution that contained multiple competing metal ions in pH range of 3.0–6.0. Thermodynamic adsorption results further verified the spontaneous and endothermic nature of the binding process. Additionally, the PAN MW -Phos showed satisfied desorption and reusability in five times application. The effective extraction of U(VI) ions was mainly attributed to the inner surface complexation mechanism between phosphonic groups and U(VI) ion. The feasible preparation method, higher capacities, excellent selectivity and promising recyclability endow the phosphorylated fiber as suitable adsorbent for extraction of U(VI) from aqueous solution.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）