RSC Advances
·
2020
·Vol. 10
·期 24
·13998-14006
·
IF 3.119
Jun Zhang,Xiuyang Zhao,Xuefeng Liu,Chuan Dong
Two organic molecules, pyridoxal hydrazide (PAH) and salicylaldehyde based Rhodamine B hydrazone (RBS) were integrated into zeolitic imidazolate framework-8 (ZIF-8) to give composites, namely PAH/ZIF-8 and RBS/ZIF-8. The organic molecules and ZIF-8 are proposed to be assembled via hydrogen bonds and π–π stacking in the composites. The mass fraction of PAH and RBS in the composites was calculated to be 21.86% and 29.3%. The fluorescence of PAH/ZIF-8 is quenched regularly by Cu2+. The detection limit for Cu2+ was calculated to be 1.42 nM for PAH/ZIF-8, which is one order of magnitude lower than that of PAH. The detection limit for Cu2+ was determined to be 0.8 μM for RBS/ZIF-8, which is three times lower than that of RBS. The two composites both display high selectivity to Cu2+ over competing metal ions. The PAH/ZIF-8 fluorescent sensor was successfully applied to Cu2+ determination in environmental water. PAH/ZIF-8 exhibits excellent cell membrane permeability and low cytotoxicity in cellular imaging. The enhanced chemical sensor was designed by introducing small molecules into ZIF-8 for the specific recognition of Cu2+.
研究领域:
化学传感
·
材料科学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 17
·4793-4799
·
IF 5.976
Yongfeng Liu,Xiaosheng Tang,Tao Zhu,Ming Deng,Iroegbu Paul Ikechukwu,Wei Huang,Guolu Yin,Yongzhong Bai,Dingrong Qu,Xianbin Huang,Feng Qiu
Pollution triggered by highly toxic heavy metal ions has become a worldwide issue of concern, and has aroused increasing research interest, but it is still a challenge to carry out its trace detection in the organic phase using inorganic fluorescent colloidal nanocrystals (NCs). Herein, we report fully inorganic CsPbBr3 perovskite quantum dots (PQDs), which were synthesized via a hot-injection method, as a fluorescent probe for the selective detection of copper ions in hexane. The photoluminescence (PL) intensity of CsPbBr3 PQDs is significantly quenched within several seconds after the addition of Cu2+ due to effective electron transfer from the PQDs to the added Cu2+, which is experimentally verified via analyzing absorption spectra and PL decay lifetime. The sensor, in turn-off mode, has a detection range from 0 to 100 nM with a limit of detection (LOD) as low as 0.1 nM, indicating great potential for practical applications. This study paves the way for PQD-based fluorescent probes for heavy metal detection in the organic phase.
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
CELLULOSE
·
2021
·Vol. 28
·期 12
·7953-7968
·
IF 5.044
Xing Xinyi,Li Wenqi,Zhang Jie,Wu Han,Guan Ying,Gao Hui
In this study, the hydrogel was prepared by dissolving and regenerating poplar cellulose in NaOH/urea/water system. The TEMPO-oxidized cellulose hydrogels (TCH) were prepared using microwave-assisted accelerated TEMPO-oxidation system. Polyethyleneimine (PEI) was grafted onto TCH with glutaraldehyde as a cross-linking agent and the products named as TCP. The hydrogels were characterized by SEM, FTIR, XPS, and elemental analyzer. The maximum adsorption capacities of Cu 2+ and Pb 2+ by TCP were 109.89 mg/g and 279.32 mg/g, respectively. TCP was a single molecule adsorption process with better fitting of the Langmuir model. Adsorption kinetics showed that the Pb 2+ adsorption rate of TCP was higher than that for Cu 2+ . The Cu 2+ affinity of TCP was higher than the Pb 2+ . The adsorption capacity of TCP for Cu 2+ and Pb 2+ was 58.26 mg/g and 91.96 mg/g, respectively, after five cycles. This study provided a promising option of preparing an efficient and recyclable adsorbent in treating wastewater containing heavy metal, such as Cu 2+ and Pb 2+ .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2011
·
IF 3.37
Min Sun,Bin Ding,Jianyong Yu,You-Lo Hsieh,Gang Sun
A highly sensitive coating comprising 3-mercaptopropionic acid (MPA) monolayer modified electrospun polystyrene (PS) membranes was constructed on the electrode of quartz crystal microbalance (QCM) for Cu 2+ detection. The three-dimensional fibrous PS membranes with high specific surface area (SSA) were deposited on the electrode of QCM via electrospinning. The PS membranes were sputter coated with gold, then modified with self-assembled monolayer of MPA. The PS-MPA sensors showed fast response (2–3 s) to Cu 2+ and a detection limit down to 100 ppb. Additionally, sensor sensitivity increased concurrently with both increasing PS loading and SSA on QCM electrodes . The response of the PS-MPA sensors with a PS membrane loading of 978 Hz and SSA of 43.31 m 2 /g was 40 times larger than that without membranes when exposed to 1 ppm of Cu 2+ . The sensor responses were reproducible toward Cu 2+ in the 100–5 ppm concentration range, whereas a linear response was found in the 100–1 ppm concentration range. The sensor response to Cu 2+ showed a linear relationship with an increase in pH from 2 to 7. Moreover, the sensors also exhibited chelation selectivity for other transition metal ions in the descending order Cu 2+ > Ni 2+ > Zn 2+ > Fe 2+ at concentration between 1 and 5 ppm.
研究领域:
分析化学
·
环境监测
·
材料科学
·
生物传感器
·
纳米技术
·
重金属检测
·
表面功能化
✓ 已验证
DOI
高影响因子
Polymer Chemistry
·
2013
·Vol. 4
·期 7
·2325-2332
·
IF 5.231
Peisheng Zhang,Jian Chen,Fuhua Huang,Zhiqiang Zeng,Jia Hu,Pinggui Yi,Fang Zeng,Shuizhu Wu
Cupric pollution is a global problem, and the development of stable and sensitive fluorescent probes for cupric ions in the water phase has long been sought. In the present study, we report on the fabrication of core–shell nanoparticle-based fluorescent chemosensors for Cu2+ detection in aqueous media. The core–shell nanoparticle sensor was prepared by a facile one-pot miniemulsion polymerization, in which the fluorescent dye (4-methamino-9-allyl-1,8-naphthalimide, MANI) was covalently incorporated into particle core and the Cu2+ ligand i.e. Vinylbenzylcyclam (VBC), chemically linked onto the surface. The cyclam-functionalized fluorescent polymeric nanoparticles exhibit a high affinity for Cu2+ ions in aqueous media. Upon the addition of Cu2+, the fluorescent emission of the MANI dye in nanoparticles can be quenched on the basis of intraparticle fluorescence resonance energy transfer (FRET) from the dye in the hydrophobic PMMA core to the Cu2+–cyclam complexes on the nanoparticle surface, and the nanoparticle sensor can selectively detect the Cu2+ in water with the detection limit of 500 nM. The observed FRET efficiencies (31.6–73.4%), as well as the distance (r) between MANI (donor) and Cu2+–cyclam complexes (acceptor), were also determined. No interference was observed from other metal ions, making it a highly sensitive and selective Cu2+ probe. Moreover, the nanoparticle-based fluorescent sensor was applicable in a relatively wide pH range (pH 4–10) in water and it exhibited excellent long-term photostability for Cu2+ detection (>45 days) in aqueous media; thus, this approach may provide a new strategy for ratiometric detection of analytes in environmental and biological applications.
研究领域:
分析化学
·
环境监测
·
纳米医学
·
生物传感
·
分子探针
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 54
·115543-115555
·
IF 5.8
Lei Dengke,Li Shulei,Gao Lihui,Hu Ming,Chai Na,Fan Jundi
The limited application of high-sulfur coal (HSC) and the increasing severity of copper pollution in solution are two pressing issues. To alleviate such issues, a sulfur self-doped coal-based adsorbent (HSC@ZnCl 2 ) was obtained by pyrolysis (850 °C, 60 min holding time) of HSC and ZnCl 2 with a mass ratio of 1:0.5. The results adsorption experiment revealed that the endothermic and spontaneous adsorption process was consistent with the Sips isothermal model ( R 2 = 0.992) and pseudo-second-order kinetic ( R 2 = 0.994), and that the adsorption process with a maximum adsorption capacity of 11.97 mg/g. Meanwhile, the adsorption of Cu 2+ onto HSC@ZnCl 2 was a result of the synergistic effects of various interactions, such as the complexation by oxygen-containing functional groups, electrostatic attraction and surface precipitation by ZnS on the adsorbent surface, and the process also included redox reaction. The findings of this work indicate that the preparation of sulfur self-doped coal-based adsorbent prepared from high-sulfur coal is a promising method for its large-scale utilization.
✓ 已验证
DOI
高影响因子
LUMINESCENCE
·
2019
·Vol. 34
·期 2
·193-199
·
IF 1.691
Nan Liu,Juan Hao,Lili Chen,Yonghai Song,Li Wang
Zeolitic imidazolate framework-8 (ZIF-8) loading rhodamine-B (ZIF-8@rhodamine-B) nanocomposites was proposed and used as ratiometric fluorescent sensor to detect copper(II) ion (Cu 2+ ). Scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray powder diffraction, nitrogen adsorption/desorption isotherms and fluorescence emission spectroscopy were employed to characterize the ZIF-8@rhodamine-B nanocomposites. The results showed the rhodamine-B was successfully assembled on ZIF-8 based on the π-π interaction and the hydrogen bond between the nitrogen atom of ZIF-8 and –COOH of rhodamine-B. The as-obtained ZIF-8@rhodamine-B nanocomposites were octahedron with size about 150–200 nm, had good water dispersion, and exhibited the characteristic fluorescence emission of ZIF-8 at 335 nm and rhodamine-B at 575 nm. The Cu 2+ could quench fluorescence of ZIF-8 rather than rhodamine-B. The ZIF-8 not only acted as the template to assemble rhodamine-B, but also was employed as the signal fluorescence together with the fluorescence of rhodamine-B as the reference to construct a novel ratiometric fluorescent sensor to detect Cu 2+ . The resulted ZIF-8@rhodamine-B nanocomposite fluorescence probe showed good linear range (68.4 nM to 125 μM) with a low detection limit (22.8 nM) for Cu 2+ combined with good sensitivity and selectivity. The work also provides a better way to design ratiometric fluorescent sensors from ZIF-8 and other fluorescent molecules.
研究领域:
分析化学
·
材料科学
✓ 已验证
DOI
高影响因子
LUMINESCENCE
·
2018
·Vol. 33
·期 7
·1268-1274
·
IF 1.671
Li Yang,Mulan Zeng,Yue Du,Li Wang,Bingxian Peng
A ratiometric fluorescence sensor for Cu 2+ detection was developed by employing carbon dots (CDs) as the reference fluorophore, and bovine serum albumin (BSA)–Au nanoclusters (AuNCs) both as specific recognition element and as response signal. The CDs were prepared by heating an acetic acid solution of chitosan at 180°C. The proposed nanoprobe was prepared by simply mixing the CDs and BSA–AuNCs. Here, the CDs were associated with BSA–AuNCs to form CDs/BSA–AuNCs nanoprobes based on electrostatic interaction and hydrogen bonds. In the hybrid fluorescent CDs/BSA–AuNCs nanoprobe, the emission of BSA–AuNCs at 640 nm was quenched by Cu 2+ , whereas the emission of CDs at 424 nm was maintained. The fluorescence changes of I 640 / I 424 had good linearity with Cu 2+ concentration in the range 1.5–600 nM, and the detection limit of the nanoprobe was 0.5 nM for Cu 2+ detection, almost 4 × 10 4 times lower than the maximum allowable amount of Cu 2+ in drinking water. The proposed method for detecting Cu 2+ also had high selectivity and feasibility.
研究领域:
分析化学
·
纳米生物技术
·
环境科学
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2021
·
IF 4.889
Ziwei Lin,Sheng Wang,Qing Yan,Qinghua Yan,Derong Cao
Light is not the only stimuli which can coverts donor-acceptor Stenhouse adducts (DASAs) from the triene to the cyclopentenone form. Here, we firstly demonstrate that Cu 2+ can drive linear-to-cyclic isomerization of DASAs in acetonitrile , which increase the rate of color fading. Three different generations of DASAs ( DASA-1 , DASA-2 , and DASA-3 ) have been synthesized by Knoevenagel condensation to verify the universal applicability of the mechanism by which copper ions discolor DASAs. The Job's plot of DASA-1 to Cu 2+ indicated DASA-1 binds to Cu 2+ with a ratio of 1:1, and the 1 H NMR titration spectrum of Cu 2+ on DASAs as well as the UV–Vis absorption spectra with adding Cu 2+ showed that copper ions could induce the process of linear-to-cyclic isomerization of DASAs in acetonitrile. Based on this, we propose copper ions as the eraser of a DASA derived ink to achieve repeatable erasing. Furthermore, DASAs have been utilized as a Cu 2+ sensor with high selectivity and sensitivity.
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Zhenzhen Cui,Baoying Wang,Ruirui Li,Zihao Wang,Weicheng Fu,Junying Yan,Liang Wu,Yaoming Wang,Tongwen Xu
The development of efficient separation technologies for Bi3+ is highly desirable to meet the increasing demand for technology-critical bismuth. In this study, bis(2-ethylhexyl) phosphate (HDEHP)-functionalized pore-filling membranes were fabricated for the efficient separation of Bi3+ and Cu2+ via electrodialysis. Microstructural and chemical characterizations demonstrated the superior compatibility between HDEHP and the polymer chains. The tight arrangement of functional groups within the membrane established a continuous transport pathway for metal ions, enabling selective separation of Bi3+ via an ion-exchange process. Under optimal conditions, the Bi3+ flux reached 2.6 mmol m–2 h–1 with an outstanding perm-selectivity PCu2+Bi3+ of 26.3 during electrodialysis. Moreover, the separation efficiency could be further improved by increasing the number of repeating membrane units, laying a foundation for practical industrial applications. This work provides a promising candidate for the efficient and convenient selective recovery of technology-critical metals from industrial wastewater.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Song Wang,Hongyan Li,Yusheng He,Jiaxin Rui,Zhaogang Teng,Lihong Qi,Kai Pan
All-inorganic lead halide perovskites (CsPbX3) have attracted extensive attention due to their outstanding optoelectronic properties; however, their practical applications are severely limited by structural instability and defect-induced nonradiative recombination. Herein, we report a kinetically controllable hot-injection strategy to synthesize Cu2+-doped CsPbI3 nanoplates (NPLs). By precisely regulating the injection timing and amount of hydroiodic acid, a critical balance nucleation and growth is established, enabling the formation of uniform NPLs. Structural analysis confirms successful incorporation of Cu2+ into the CsPbI3 lattice without phase transition, accompanied by slight lattice contraction. Importantly, Cu2+ doping does not significantly change the bandgap but effectively reduces defect density, as evidenced by decreased Urbach energy and prolonged carrier lifetime. As a result, the photoluminescence quantum yield is maximized at an optimal doping level of 10%, reflecting effective defect suppression. Time-resolved photoluminescence further reveals suppressed nonradiative recombination and improved carrier dynamics. Moreover, the doped NPLs exhibit significantly enhanced stability, retaining ∼82% of their initial PL intensity after 20 days, compared to ∼8% for pristine samples. Overall, this work provides an effective strategy for simultaneously improving the luminescence performance and environmental stability of perovskite nanomaterials through defect engineering.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.2
Sen Yang,Yuhang Wang,Fenghuan Zhao,Xiaobin Xie,Yue Liu,Hongyu Zhao,Ziwei Liu,Chun-Chao Hou,Junjie Qin,Bohua Dong,Lixin Cao,Chenghui Xia
The atomic coherence of heterojunction interfaces critically governs charge transport but remains difficult to control in cation-mobile copper chalcogenides. Here, we identify the crystal phase of Cu2-xS seeds as a decisive and previously underappreciated parameter that governs interfacial coherence and strain in Janus Cu2-xS/CdS heteronanorods. By selectively employing hexagonal (covellite) and cubic (digenite) Cu2-xS seeds, heteronanorods with distinctly different interfacial structures are obtained. Atomic-resolution transmission electron microscopy combined with geometric phase analysis quantitatively reveals that the digenite seed forms a highly coherent interface with CdS, featuring a reduced lattice mismatch (~5.1% versus ~7.4%) and a markedly localized strain field with a halved maximum lattice strain (~4% versus ~8%). First-principles calculations further show that this coherent interface possesses a more negative formation energy and enhanced electronic coupling, giving rise to a stronger built-in electric field across the heterojunction. As a consequence of the improved interfacial coherence, the digenite-seeded heteronanorods exhibit more efficient charge separation and reduced interfacial resistance, which is reflected in their superior visible-light-driven photocatalytic hydrogen evolution performance. This work establishes seed crystal phase as a fundamental design parameter for regulating interfacial nanostructure and strain in heterostructures, providing a general physical guideline for minimizing interfacial losses in heteronanojunctions.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）