Results in Surfaces and Interfaces
·
2025
·
IF 4.4
Jiaqi Li,Lingxi Zhao,Tianyi Zhang,Zhu Yang,Xiangnan Liu,Bo Hu,Lun Zhao,Guangbo Che
A novel mesoporous ion-imprinted fluorescent sensor (SiO 2 @CDs@MIIPs) was developed for the detection of Cu 2+ in aqueous environments. This sensor was constructed by modifying mesoporous silica nanospheres with blue-emitting carbon dots (CDs), which serve as both a fluorescence source and a functional platform. The mesoporous structure ensures efficient ion recognition and facilitates rapid mass transfer, while the integration of CDs enhances fluorescence stability. The sensor demonstrated a detection limit of 5.74 μM, a linear range of 20–100 μM, and a rapid response time of 3 minutes. Although the selectivity and sensitivity are moderate, the unique combination of mesoporous silica and CDs provides a stable and practical solution for Cu 2+ detection. Validation using tap water and river water samples confirmed its reliability, with results aligning closely with those obtained by ICP-MS. This work highlights the potential of functionalized silica-based nanomaterials for environmental monitoring and offers a promising direction for the design of ion-imprinted fluorescent sensors.
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产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2025
·
IF 4.9
Guo Yuxiang,Zhu Jingyun,Sun Changge,Li Yubao,Li Tian,Liu Chao,Wang Qi
Carbon dots (CDs) are suitable for metal ion detection owing to their distinct optical tunability, structural controllability, and varied fluorescence response mechanisms. This research produced blue-fluorescent carbon dots (B-CDs) and red-fluorescent carbon dots (R-CDs) by a one-step microwave-assisted technique. B-CDs specifically recognized Cu 2+ in an aqueous system, while R-CDs exhibited a distinctly selective response to Fe 3+ . Composite carbon quantum dots (B/R-CDs) with purple fluorescence were synthesized by integrating B-CDs and R-CDs, achieving superior dual-metal ion detection capabilities. Using B/R-CDs with dual fluorescence emission peaks, and by monitoring the changes in their ratio fluorescence signals, the designed ion detection system can simultaneously detect Cu 2+ and Fe 3+ in aqueous solutions. The detection process for the two metal ions corresponds to distinct dynamic quenching behaviors of the B/R-CDs. Specifically, Cu 2+ and Fe 3+ form unique coordination structures with the functional groups of the B/R-CDs, leading to different energy level arrangements. This not only enables the discriminative detection of the two metal ions by the B/R-CDs but also ensures immunity from interference by other metal ions. The synthesized dual-emissive B/R-CDs material can be prepared as a single reagent for the quantitative detection of two trace metal ions. Furthermore, test strips and test inks developed with it as the primary component enable semi-quantitative and visual detection.
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产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 84
·68430-68438
·
IF 3.84
Yili Xie,Qiang Huang,Meiying Liu,Ke Wang,Qing Wan,Fengjie Deng,Long Lu,Xiaoyong Zhang,Yen Wei
Carbon nanotubes (CNTs) have been widely used as adsorbents to remove various environmental pollutants because of their unique one dimensional structure, large surface areas and amount of micropores. However, the adsorption capacity of unmodified CNTs toward heavy metal ions is still limited due to their poor dispersibility and lack of functional groups. In this work, a novel strategy has been developed to prepare polyethylenimine functionalized CNTs via the combination of mussel inspired chemistry and the Michael addition reaction. The successful preparation of CNTs with amine groups was confirmed by a series of characterization measurements such as transmission electron microscopy, Fourier transform infrared spectroscopy, and thermal gravimetric analysis. Furthermore, the adsorption application of these amine functionalized CNTs toward Cu2+ was also examined. The effects of various factors including contact time, pH values, temperature and initial Cu2+ concentrations on the adsorption capability of the amine functionalized CNTs were also investigated. Langmuir and Freundlich models were used for thermomechanical analysis. The pseudo-first-order, pseudo-second-order and intra-particle diffusion models were used for the kinetics analysis. The results demonstrated that CNTs can be successfully functionalized with amine groups through a rather facile and mild bioinspired strategy. These amine functionalized CNTs exhibited a much enhanced adsorption efficiency toward Cu2+. Given the strong and versatile adhesion of PDA to various materials, the bioinspired strategy described in this work could also be utilized for the fabrication of many other nanocomposites for environmental applications.
研究领域:
环境科学
·
材料科学
·
化学工程
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Hua Liang,Zongchen Li,Daqiang Wu,Ke Dai,Luyao Zhong,Yonggang Liu,Minhao Yan,Xianguo Tuo
Structure is a crucial factor to decide the selectivity and sensitivity of chemosensors. In this work, a diacylhydrazone 2a and its congeneric derivatives 2b-2d were synthesized and their applications for Al 3+ detection were investigated. Except 2d , all the other compounds exhibit notable turn-on fluorescence toward Al 3+ over 15 other metal ions and the sensitivities of 2b and 2c are even higher after modification, illustrating ortho -OH indispensability in their structures for sensing. Reversibility investigation shows that the sensors all have regeneration ability. Meanwhile, the sensor-Al 3+ systems show selective fluorescence turn-off for Cu 2+ , providing a potential platform for tandem recognition of Al 3+ and Cu 2+ . 2a as a standard, shows a 1:2 molar ratio to Al 3+ confirmed by Job’s plot, 1 H NMR spectra and mass spectra, and its detection limit for Al 3+ is 7.63 nM in ethanol. It has relevant sensitivity over pH 3-9, with the highest sensitivity at around pH 4. Apart from Al 3+ detection, anion selectivity was also explored and it shows that 2a , 2b and 2c all have selectivity toward CN − evidenced by UV-vis spectra.
研究领域:
化学传感器
·
分析化学
·
材料科学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Chang-Qing Lin,Jun-Peng Deng,Zhe-Hui Lu,Zhen-Hua Liang,Yu-Ru Ling,Jun-Xi Liu,Wang Han,Chun-Yang Pan
Cu 2+ doped CsPbBr 3 PQDs with a PLQY of 91 % were synthesized via a continuous microfluidic approach. The precise regulation of flow rate and reaction temperature enabled fine control over the crystal size and structure. Time-resolved photoluminescence (TRPL) and transient absorption (TA) spectroscopy revealed picosecond-scale carrier recombination dynamics and distinct band-edge bleaching behavior in CsPb 0.89 Cu 0.11 Br 3 PQDs, confirming the effective defect passivation induced by Cu 2+ incorporation. Furthermore, flexible CsPb 0.89 Cu 0.11 Br 3 /PCL composite films exhibited an exceptional light yield of 21340 photons MeV −1 and a low detection limit of 82.5 nGy s −1 under X-ray excitation.
研究领域:
材料科学
·
纳米科技
·
核医学成像
·
生物医学工程
·
辐射探测
·
光电子学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121881
·
IF 7.5
Qun Liu,Jiexiong Zhong,Huaiyu Wang,Shiqi Song,Xiaohui Xu,Wei Yang,Min Lu
The thorough removal of Cu 2+ from water poses a formidable challenge in environmental remediation. To overcome the performance limitations of traditional adsorbents that rely on physical pores or single functional groups. This study successfully constructs a hierarchical mesoporous composite, denoted as Cys-PDA@CoNi-LDH (where Cys, PDA, and LDH refer to L -cysteine, polydopamine, and layered double hydroxide, respectively). It is synthesized by grafting Cys onto a PDA framework via Michael addition, followed by in situ growth of CoNi-LDH nanosheets. The composite exhibits a high Cu 2+ adsorption capacity of 295.3 mg·g −1 and a removal efficiency of 92.2 % under optimal conditions (318 K, pH=6), with strong resistance to ionic interference. The synergistic mechanism involves specific -SH coordination, LDH ion exchange, surface complexation, and mesoporous confinement. Efficient desorption (86 % recovery) is achieved using 0.1 mol·L −1 HCl, and over 75 % of the initial capacity is retained after five cycles. Fixed-bed column experiments confirm its practical potential, with breakthrough curves well-fitted by Thomas and Yoon-Nelson models (adjusted R 2 = 0.986–0.999). Notably, it achieves a treatment capacity of 1.7 L·g −1 for low-concentration Cu 2+ (5 mg·L −1 ). This work provides a promising strategy for designing selective and renewable adsorbents for water purification.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 35
·16806-16821
·
IF 3.553
Zhou Shile,He Hui,Wang Lei,Zhu Hongxiang,Wang Shuangfei
Excessive content of Cu 2+ in water is not allowed since it is pathogenic to human beings and most aquatic animals. In this report, to reveal the general colorimetric recognition mechanism of solid-based sensors, containing soft acid coordination ligand types (–COOH, –C=O, –S–) for Cu 2+ , a series of polyacrylonitrile fibre-based colorimetric sensors (PAN-TEPA-X) with regular precise coordination structures was designed and prepared, where axially symmetric carboxylic acid molecules (X, (CH2) m S n (COOH)2, 3 < m < 7, n < 3) were grafted onto aminated polyacrylonitrile (PAN-TEPA), respectively. For the PAN-TEPA-X, the limit detection of Cu 2+ decreased from 1 × 10 –5 to 1 × 10 –6 mol/L and to 1 × 10 −7 mol/L with the increase in the number ( n ) of S coordination atoms in (CH 2 ) m S n (COOH) 2 ; thus, –S– was a significant ligand type for improving the colorimetric limit of detection of PAN-TEPA-X for Cu 2+ . The selective recognition mechanism of PAN-TEPA-X for Cu 2+ was unified and revealed that a portion of the Cu 2+ was reduced to Cu 1 species, and then, the Cu 2 /Cu 1 species were chelated and enriched on the PAN-TEPA-X fibres through a tetradentate ligand reaction (arranged “tail to tail” and “shoulder to shoulder”) between the coordination ligand types (–COOH, –C=O, and –S–) of PAN-TEPA-X and Cu 2 /Cu 1 according to the theory of hard and soft acids and bases.
研究领域:
材料科学
·
分析化学
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DOI
高影响因子
Energy Storage Materials
·
2019
·
IF 0
Yunjie Li,Xiucai Sun,Zhenjie Cheng,Xiao Xu,Jun Pan,Xianfeng Yang,Fang Tian,Yanlu Li,Jian Yang,Yitai Qian
Transitional metal chalcogenides , one important family of promising candidates as electrode materials for sodium-ion batteries, gradually convert to Cu 2 S or Cu 2 Se in the discharge/charge processes, due to electrochemically driven copper diffusion. Thus, their performances after the electrochemical activation, actually come from copper chalcogenides . In this regard, the thorough investigation on the electrochemical properties of copper chalcogenides is important and necessary for the rational design of transitional metal chalcogenides . Here, mesoporous Cu 2-x Se nanocrystals synthesized by a simple solvothermal reaction, are used as a model. They experience the complicated intercalation reaction and the conversion reaction upon cycling, as supported by in-situ / ex-situ techniques and first-principle calculations. All these reactions are highly reversible, leading to 96.1% of the theoretical capacity. These nanocrystals preserve 88% of the initial capacity after 3000 cycles at 5 A g −1 . Even at 10 A g −1 , the capacity is still kept as 92.1% of that at 0.1 A g −1 . In full cells, the nanocrystals without any pre-sodiation and pre-activation, present a lifespan up to 2000 cycles at 0.5 A g −1 and a capacity retention about 74.2%.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机化学
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DOI
ANALYST
·
2018
·Vol. 143
·期 21
·5145-5150
·
IF 3.864
Yunxiao Jia,Tianxia Sun,Yingnan Jiang,Weiyi Sun,Yu Zhao,Jingwei Xin,Yiting Hou,Wensheng Yang
Gold nanoclusters have attracted widespread attention because of their unique optical and physical properties. However, traditional synthesis methods are complicated and require additional reducing agents, while the yield is often very low. Such resource and time-consuming synthesis processes limit their further application. Herein, a rapid sonochemical route is used to synthesize fluorescent Au nanoclusters in large quantities using glutathione (GSH) both as a capping and reducing agent. These Au nanoclusters are synthesized quickly (∼40 min) due to the presence of ultrasonic waves, and show orange red photoluminescence (Em = 598 nm), small size (∼2 nm) and good dispersion in aqueous solution. Moreover, GSH, as a protecting agent on the surface of resultant Au nanoclusters, has many functional groups including carboxyl and amino groups because of which the nanoclusters show high photo-, storage-, metal- and pH-stability. A stable Au nanoclusters-based nano-sensor is designed for highly sensitive and selective label-free detection of Cu2+ with a low limit of detection of 7 ppb (based on S/N = 3). The fluorescent probe can be used in versatile nanothermometry devices, because their photoluminescence intensity correlates strongly with temperature and varies considerably over a wide temperature range (20–80 °C). Therefore, the novel fluorescent sensing probe has great application prospects in Cu2+ detection and temperature sensing.
研究领域:
纳米医学
·
分析化学
·
生物传感
·
分子影像
·
环境监测
·
热疗监测
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yurou Feng,Amatjan Sawut,Rena Simayi,Xieraili Maimaitiyiming,Xueying Jiao
With the advancement of science and technology, the issue of wastewater pollution has escalated, necessitating urgent attention to wastewater treatment . In this study, a highly efficient adsorbent for Cu 2+ was successfully synthesized through in situ self-assembly using Ca 2+ as the cross-linking agent in ZIF-8@ALG composite hydrogel. The results demonstrated that the incorporation of Ca 2+ as the cross-linker enhanced both adsorption capacity and swelling properties of ZIF-8@ALG composite hydrogel. Adsorption performance evaluation revealed that the hydrogel followed pseudo-second-order kinetic model for Cu 2+ adsorption and Freundlich isotherm model with a theoretical maximum adsorption capacity of 309.57 m g −1 . Thermodynamic analysis indicated that Cu 2+ adsorption onto the hydrogel occurred spontaneously with heat absorption. Furthermore, excellent reusability was observed after five cycles of usage without significant loss in adsorption efficiency. Overall, these findings highlight the potential application of ZIF-8@ALG composite hydrogel as an effective solution for wastewater remediation and recovery of heavy metal ions.
研究领域:
环境科学
·
材料科学
·
化学工程
·
环境污染治理
·
重金属去除
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Licai Hao,Yang Shen,Xuanhu Chen,Xiaodong Yang,Qianqian Du,Yue Bian,Liang Chen,Kun Tang,Rong Zhang,Youdou Zheng,Shulin Gu
We report the interaction between different sizes of CdTe quantum dots (CdTe QDs) and copper (II) ion (Cu 2+ ) via experimental and theoretical aspects. Different sizes of CdTe QDs are synthesized and size effects on the selectivity in the detection of Cu 2+ ions are studied. Experimental results indicate that with the size of CdTe QDs from 1.8 nm to 2.7 nm and to 3.2 nm increases, the linear range gets wider. For the smallest size of QD (QD 524 , 1.8 nm), the linear range is 1.0–5.0 × 10 −5 M with a limited detection of 2.8 × 10 −5 M. The Stern–Volmer plots at different temperatures demonstrate that the fluorescence of CdTe QDs is quenched by Cu 2+ ion through a dynamic quenching mechanism, and the physiological mechanism is analyzed. Electrons are transferred from CdTe QDs to Cu 2+ ion, and Cu 2+ ion acquire electrons and are reduced to Cu + ion, leading to fluorescence quenching . Meanwhile, with the increase in the number of transferred electrons, the phenomenon of fluorescence quenching is more obvious. In order to validate the process of electron transfer , the amount of transferred charge between Cu 2+ and CdTe QDs are calculated by using first principles density functional theory (DFT). Calculation results show that the smaller the QDs are, the more electrons they transfer. The linear range of the smaller size QDs (QD 524 ) is the narrowest, indicating fluorescence quenching is indeed the most obvious of all three sizes.
研究领域:
纳米材料
·
分析化学
·
量子点
·
环境传感
·
理论化学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 22
·4880-4888
·
IF 5.066
Dongxu Zhu,Aiwei Tang,Lan Peng,Zhenyang Liu,Chunhe Yang,Feng Teng
A simple low-cost and phosphine-free colloidal method was developed to prepare disk-shaped Cu2−xS nanocrystals (NCs) with different crystal structures and basal planes, which could be manipulated effectively by varying the Cu : S feed molar ratios and the amount of surfactants. The near-infrared (NIR) localized surface plasmon resonance (LSPR) wavelength could be tuned from 1133 to 1512 nm with the crystal phase changing from CuS (covellite) to monoclinic Cu7S4 (roxbyite) and Cu31S16 (djurleite). Phase transformation had more important effects on tuning the plasmonic resonance than the surface interaction of the deprotonated carboxyl functional group of oleic acid. Moreover, the crystal phase could transform from covellite to djurleite and the morphology underwent a transition from nanodisks to nanospheres when the post-treatment temperature of CuS nanodisks by dodecanethiol (DDT) was increased to 120 °C, but only a size decrease took place at room temperature. As a result, a slight red-shift of the LSPR wavelength was observed at room temperature, but an obvious red-shift from 1140 to 1910 nm with the change in crystal structure and morphology. The post-treatment temperature played an important role in tuning the plasmonic resonance of the products, which was closely associated with the variation of the crystal structure, morphology and surface properties.
研究领域:
纳米材料
·
等离激元学
·
胶体化学
·
材料科学
·
光学性质
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DOI
高影响因子
危险品化学品经营许可证（带存储）