ACS Applied Nano Materials
·
2025
·
IF 5.5
Hanqing Liu,Yifei Zhou,Jing Xu,Le Ding,Chuan Liao,Tao Wang,Haifeng Zhou,Guangjun Zhou
High-efficiency detection of cadmium ions (Cd2+) and mercury ions (Hg2+) is crucial due to their harmful effects on the environment and human health. Here, we developed a ratiometric upconversion fluorescence (UCF)-based nanosensor by incorporating lanthanide-doped upconversion nanoparticles (UCNPs) and gold nanoparticles modified with trithiocyanuric acid (TMT-AuNPs) as specific recognition elements for the highly sensitive and selective real-time detection of Cd2+ and Hg2+. The developed nanosensor exhibited selective absorbance enhancement and UCF quenching behavior with the addition of Cd2+ and Hg2+ based on the inner filter effect (IFE). The sensitivity of the nanosensor was significantly enhanced by converting the change in absorbance into an exponential variation in UCF intensity. Therefore, the quantitative detection of Cd2+ and Hg2+ was achieved by measuring the UCF ratio I654/I540. In order to distinguish between Cd2+ and Hg2+, two biomolecules, glutathione (GSH) and ascorbic acid (AA), were used based on their different interactions with Cd2+ and Hg2+. GSH formed a specific tetrahedral complex (GSH)4Cd with Cd2+, thereby preventing Cd2+ from inducing changes in UCF intensity. In contrast, AA specifically reduced Hg2+, thereby preventing Hg2+-induced UCF changes. Thus, GSH and AA could also be detected. The limits of detection (LODs) of Cd2+, Hg2+, GSH, and AA were 2.8, 5.2, 5.1, and 7.2 nM, respectively. The designed detection platform provides a sensitive and straightforward sensing strategy for the multiplex detection of heavy metal ions and biological small molecules.
研究领域:
分析化学
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环境科学
·
生物医学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jiawen Wu,Xiaonan Sun,Junting Wu,Xue Yu
This study proposes a green and simple strategy for efficiently removing heavy metals from wastewater by activating biochar with eggshell and in-situ generating CaO/Ca(OH) 2 . Characterization results revealed that the composite carbon material (BCEg15) successfully incorporated CaO/Ca(OH) 2 active sites compared to the raw biochar (BC). Additionally, eggshell activation increased the specific surface area and pore volume of BCEg15 by 4.36 and 6.80 times, respectively, compared to BC. These structural enhancements increased the maximum adsorption capacity of BCEg15 for Pb 2+ and Cd 2+ by 20.68 and 42 times, respectively, compared to BC. Importantly, the loading of CaO and Ca(OH) 2 significantly enhanced the ion exchange and mineral precipitation capacities of the biochar. For instance, compared to BC, the adsorption capacities of BCEg15 attributed to ion exchange (Q e ) for Pb 2+ and Cd 2+ rose by 403.12 mg/g and 197.65 mg/g, respectively, while the adsorption capacities attributed to mineral precipitation (Q p ) increased by 19.60 times and 45.20 times, respectively. BCEg15 demonstrated excellent reusability, maintaining adsorption capacities of 461.18 mg/g for Pb 2+ and 265.26 mg/g for Cd 2+ after five cycles. Additionally, BCEg15 outperformed commercial activated carbon in treating heavy metals from desulfurization wastewater from coal-fired power plants, achieving a removal efficiency of 99.98 % compared to 48.22 %. The primary mechanisms by which BCEg15 removes Pb 2+ and Cd 2+ were identified as ion exchange, mineral precipitation, complexation with oxygen-containing functional groups, and interactions with π electrons. Density functional theory (DFT) was utilized to delve deeper into the microscopic mechanisms of adsorption. The findings showed that the O-top site of CaO exhibited the greatest stability for heavy metal adsorption. Electron density difference maps and partial density of states (PDOS) results revealed a denser electron cloud and greater orbital overlap between CaO and Pb 2+ compared to Cd 2+ , suggesting a higher affinity and adsorption capacity for Pb 2+ , consistent with the experimental findings. This study presents an effective method for preparing adsorbents capable of removing Pb 2+ and Cd 2+ from wastewater and offers theoretical insights into the adsorption mechanisms of metal oxide-incorporated biochar.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
CHEMICAL PAPERS
·
2023
·Vol. 77
·期 12
·7577-7587
·
IF 2.2
He Jintao,Zhang Baozhong,Tian Panpan,Li Ying,Liu Xiaolong,Ma Xinyue,Lin Min,Zhu Huina,Chen Hanyu,Li Liping,He Baoshan
Cadmium (Cd), a typical heavy metal not essential for the human body, can cause harm to the liver and kidneys upon exposure. Hence, rapid cadmium detection in the environment is of utmost importance. This research presents an effective approach for detecting divalent cadmium ions (Cd 2+ ) using a sensitive dual hairpin (HP) electrochemical aptasensor. The aptasensor incorporates AuPd/Fe-MOF as signal labels and Au/Cu 2 O as the substrate material, and the rapid detection of divalent cadmium ions (Cd 2+ ) was based on catalytic hairpin self-assembly (CHA), as the recognition strategy. Au/Cu 2 O increased the specific surface area of the electrode and provided abundant sites for capturing the complementary deoxyribonucleic acid (CDNA) probe. The electrochemical signal is then amplified through synergistic catalytic hydrogen peroxide with AuPd/Fe-MOF, thereby enhancing the aptasensor's sensitivity. Moreover, the dual HP design effectively reduces the likelihood of non-specific capture and minimizes false positives. In this study, various analytical techniques were utilized to characterize the material and evaluate the aptasensor's performance. The morphological characteristics of the material were observed using scanning electron microscopy (SEM). Energy-dispersive spectroscopy (EDS) and X-ray diffraction (XRD) were employed to analyze the elemental composition and distribution of the material, respectively. The electrochemical behavior of the sensor was studied using cyclic voltammetry (CV), while electrochemical impedance spectroscopy (EIS) helped understand the aptasensor's assembly process. Furthermore, the aptasensor's performance was assessed using differential pulse voltammetry (DPV). Under the optimized experimental conditions, the constructed sensor demonstrated effective detection of Cd 2+ in the concentration range of 10 –4 –10 µM, with a remarkably low detection limit of 2.27 × 10 –5 µM. The feasibility of the sensor was validated by successfully detecting Cd 2+ in real water samples. .
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高影响因子
LANGMUIR
·
2026
·
IF 3.9
Si-Mian Liu,Mu-Lan Yao,Xiao Wang,Long Tang,Ji-Jiang Wang,Xiang-Yang Hou
Excessive nitrite poses potential threats to human health, making the convenient and accurate detection of nitrite anions (NO2–) critically important for practical applications. Two-dimensional (2D) metal–organic frameworks (MOFs) have attracted attention in the design and application of electrochemical sensors due to their unique structure. In this work, based on the 2D [Cd2(BPDC)2(1,4-bis)2]n (MOF1, 4,4′-biphenyldi-carboxylic acid = H2BPDC, 1,4-bis(imidazol-1-ylmethyl)-benzene = 1,4-bis) and acetylene black (AB), a novel electrochemical AB/MOF1/glassy carbon electrode (GCE) sensor is constructed and demonstrated for sensitive detection of NO2– in the solution. The research demonstrates that the AB/MOF1/GCE electrochemical sensor exhibits a wide linear response range (2–200 μM) and a low detection limit (5.7093 × 10–8 M), attributable to the synergistic effect of the selectivity contributed by the 2D MOF1 structure and the enhanced sensitivity provided by the AB. It demonstrated excellent selectivity, long-term stability, and reproducibility and can be successfully used for the detection of nitrite in actual samples with a recovery rate of 95.35–104.94%. This paper provides the synthetic application of electrochemical sensors and an effective detection method for carcinogen NO2– in the environment.
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PubMed
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2021
·
IF 3.995
Wei Tian,Yaqin Rong,Dali Li,Jin Tian,Naiming Lin,Zhongde Wang
The contamination of water by heavy metal ions can easily cause serious environmental problems and damage to the human body hands down. Using zeolitic imidazolate framework-67 (ZIF-67) as a sacrificial template, polyhedral CoS hollow nanocages (HNC) were successfully synthesized by self-template approach as adsorbents for heavy metal ions removal. The CoS HNCs suggested good chemical stability and extremely efficient heavy metal ions removal of Ag + , Cd 2+ , Cu 2+ , Pb 2+ and Zn 2+ , which can be ranked in the order of Ni 2+ ≪ Zn 2+ , Cd 2+ < Pb 2+ , Cu 2+ , Ag + . The saturation adsorption for Ag + reached 2147.944 mg g −1 and exhibited high distribution coefficients (K d ) > 107 mL g −1 . The CoS HNCs can rapidly reduce the Ag + concentration from ppm level to trace level of 1 ppb. It has been proved that the rapid and selective adsorption was achieved via the hierarchical pore structure of the CoS HNCs can better disperse these metal vacancies with super affinity and the S 2− , reduce the mass transfer distance and accelerate mass transfer. It is expected that such a CoS HNCs could be a promising alternative to conventional materials for the adsorption of heavy metal ions.
研究领域:
环境科学
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材料化学
·
纳米技术
·
水处理
·
吸附材料
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Fazal Muhammad Khoso,Jin-Gang Yu
A novel 3D RN-GO 1:3/160°C/8h composite with hetero-atomic functional groups (–O, –S, –N) was successfully fabricated using Ranitidine (RN) to functionalize GO by a facile hydrothermal assembly, which demonstrated excellent selectivity in removing Cd 2+ from aqueous solutions. The composite’s morphology, functional groups, elemental composition, and thermal stability were comprehensively characterized using SEM, EDS, FT-IR, XPS, and TGA techniques. Adsorption experiments revealed that pH, contact time, initial Cd 2+ concentration, and temperature significantly influenced the removal efficiency, and optimal conditions were identified for maximum Cd 2+ uptake. Kinetic studies indicated a complex adsorption mechanism best described by the pseudo-second-order model. Thermodynamic analysis confirmed the spontaneous and endothermic nature of the adsorption process. Furthermore, the adsorption isothermal data suggested the adsorption was monolayer over a homogeneous surface of the composite. To evaluate regeneration performance, 50.0 mg of the 3D RN-GO 1:3/160°C/8h composite was exposed to 20.0 mL of Cd 2+ aqueous solution. After five consecutive adsorption–desorption cycles, the composite maintained >95 % adsorption and desorption efficiency for Cd 2+ . The abundant hetero-atomic functional groups (–O, –S, –N) on 3D RN-GO 1:3/160°C/8h composite facilitated Cd 2+ ion adsorption through surface complexation. This study highlights the potential of the developed 3D RN-GO 1:3/160°C/8h composite as a promising adsorbent for water pollution remediation.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
ELECTROANALYSIS
·
2026
·Vol. 38
·期 1
·e70099
·
IF 2.3
Yang Chen,Xuening Wang,Huimin Si,Zhiping Sun,Qianyun Yu,Xihong Song,Ying Liu,Chuanbo Yan,Kai Yu
The increasing heavy metal pollution in marine environments has highlighted the urgent need for rapid, on-site detection methods. In this study, a reduced graphene oxide (rGO) and carboxylated multiwalled carbon nanotube (MWCNTs-COOH)-modified screen-printed electrode (SPE) was coupled with a portable electrochemical workstation for on-site detection of Pb 2+ and Cd 2+ in seawater. The key influencing factors involved in the detection process, such as deposition potential, deposition time, and pH value, have been systematically optimized. The response surface methodology (RSM) was applied to refine the portable electrochemical workstation parameters, including step potential, frequency, and pulse amplitude. The detection capability for heavy metals was significantly enhanced by using square wave stripping voltammetry (SWASV) with in situ Hg-Bi film plating, achieving detection limits of 0.4 μg/L for Pb 2+ and 0.8 μg/L for Cd 2+ . Finally, the portable workstation together with rGO/MWCNTs-COOH/SPE showed recovery rates of 101.33 ± 3.42% ~ 115.85 ± 3.50% for Pb 2+ and 101.32 ± 2.23% ~ 102.00 ± 2.00% for Cd 2+ in real seawater. The results were in good agreement with those obtained by inductively coupled plasma mass spectrometry (ICP-MS), thereby validating the detection accuracy of this platform.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Sihang Ji,Lijia Zhao,Chen Chen,Jialong Zhao,Jin Wang,Jinju Zheng,Xi Yuan
The development of quasi-two-dimensional (quasi-2D) perovskite films with high photoluminescence quantum yield (PL QY) and robust environmental stability remains a critical challenge for advanced optoelectronic applications. Herein, we report an A/B-site synergistic doping strategy by incorporating multivalent Cs + (A-site) and Cd 2+ (B-site) ions into quasi-2D BA 2 MA n-1 Pb n Br 3n+1 films, significantly enhancing their optical quality and structural stability. Notably, the bimetallic ion-doped films achieve a high PL QY of up to 90 % at 490 nm, along with excellent homogeneous phase stability (the phase separation of quasi-2D films emitting at 435 nm and 490 nm is suppressed even after 1 h and 10 h). Moreover, co-doping with multivalent Cs + and Cd 2+ ions induces a significant reduction in both grain size (10–15 nm) and surface roughness (∼1 nm), while endowing the quasi-2D films with a high exciton binding energy (>300 meV). The variable temperature PL spectra reveal the band-edge radiative dynamics, which originate from the thermal competition between exciton and trap-mediated recombination. The heat-induced electron-phonon interaction enhances the proportion of trap-mediated recombination, leading to an increase in the average PL lifetime. The A/B-site synergistic engineering provides a novel approach for improving the PL performance and photostability of quasi-2D perovskite films, paving the way toward high-performance light-emitting diodes, lasers, and other ptoelectronic devices based on the luminescent layer.
研究领域:
材料科学
·
光电子学
·
钙钛矿光子学
·
纳米材料
·
固态物理
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 14
·147520
·
IF 3.721
Xinyi Wang,Liubing Kong,Shuqi Zhou,Tao Liang,Hao Wan,Ping Wang
Photoluminescence (PL) sensors based on quantum dots (QDs) are difficult to achieve exact detection in sample waters. In this paper, polyvinyl alcohol (PVA) based CdTe/ZnS/CdS QDs and fluorescein isothiocyanate (FITC) fluorophores were used to build a ratiometric PL sensor. Combining with the homemade smartphone-based PL E-eye, the Cd2+ exact detection can be achieved. PVA was used to connect QDs and FITC fluorophores without unnecessary ligand exchange and purification. For QDs fluorophore, ethylenediaminetetraaceticacid (EDTA) was used on the surface to induce the specifically Cd2+ recognition site. For FITC fluorophore, the PL remains unchanged in this experiment. Thus, the ratio of two fluorophores can be used to provide a built-in correction. The PL changes with the increase of Cd2+ concentrations could be displayed as a visual color change on the smartphone. Further quantitative analysis could be carried out by the RGB value of the picture through the App in less than 1 min The ratio of R/G is linear to Cd2+ concentration in the range of 1–2000 μg l−1 with a low LOD of 0.057 μg l−1 (S/N). Compared with traditional analysis methods, the PL ratiometric method with PL E-eye is portable, rapid, visible and highly selective especially in discriminate Cd2+ from Zn2+.
研究领域:
环境科学
·
分析化学
·
纳米技术
·
光学传感
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DOI
高影响因子
Acta Crystallographica Section B-Structural Science Crystal Engineering and Materials
·
2023
·Vol. 79
·期 6
·525-536
·
IF 1.9
Jin N.,Liu Y.,Dai S.,Li Y.,Wang X.,Zhao Y.,Liu X.,Chen H.,Luo H.,Li W.
Four new coordination polymers, including 1D, 2D and 3D structures, were synthesized via a hydrothermal method using Cd2+/Zn2+/Cu2+ metal salts as nodes. These polymers were formed through self-assembly of four different dicarboxylic acid ligands, namely adamantane-1,3-dicarboxylic acid (H2adc), glutaric acid (H2glu), 5-hydroxyisophthalic acid (H2hip) and fumaric acid (H2fum), in conjunction with the auxiliary ligand [1,4-bis(pyridin-4-ylmethyl)piperazine (bpmp). The corresponding formulae are [Cd3(adc)2(bpmp)Cl2(H2O)2]n (1), {[Cd2(glu)2(bpmp)2(H2O)2]·8H2O·2CH3OH}n (2), [Zn(hip)(bpmp)(H2O)]n (3) and [Cu(fum)(bpmp)(H2O)2]n (4). Single-crystal X-ray diffraction studies revealed that the Cd2+ centers in complex 1 all adopt a six-coordinate mode but two distinct {CdO2N2Cl2} and {CuO5Cl} units. The 3D network of complex 1 can be simplified to a binodal (4.6)-connected underlying net with the point symbol (3·42·5·62)4(32·62·72·88·10). Each Cd2+ cation in complex 2 adopts a seven-coordinate {CdO5N2} center, forming an asymmetric pentagonal bipyramidal coordination. Its stacking structure is formed by the interaction of hydrogen bonds between 2D supramolecular layers, with the adjacent layers exhibiting mirror symmetry. Each Zn2+ ion in complex 3 displays a {ZnO3N} four-coordinate unit. Its stacking structure is formed by one-dimensional [Zn(hip)(bpmp)(H2O)]n chains connected through hydrogen bonds. On the other hand, complex 4 features a Jahn–Teller distorted {CuO4N2} octahedral coordination. Subsequently, the thermal stability of these complexes was investigated. The solid-state fluorescence spectroscopy was employed to analyze complexes 1, 2 and 3. Additionally, a Hirshfeld surface analysis was performed on complex 3.
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高影响因子
ACS Applied Bio Materials
·
2020
·
IF 0
Chang Liu,Xinrui You,Dingkun Lu,Guoyue Shi,Jingjing Deng,Tianshu Zhou
Nowadays, the environmental risk factors for Alzheimer’s disease (AD) have received widespread attention. Two major amyloid-β peptide (Aβ) variants, Aβ42 and Aβ40, play a pivotal role in the etiology of AD and the concentration ratio of which (i.e., Aβ42%) has been suggested to be the superior biomarker for AD. In this study, an “aggregation-based colorimetric sensor array” for the simultaneous identification and detection of Aβ40 and Aβ42 with structural similarity was established based on gelsolin-modified silver nanotriangles (Ag NTs) and silver nanorods (Ag NRs). Different aggregation behaviors of gelsolin-modified Ag NTs and Ag NRs in the presence of Aβ42 and Aβ40 resulted in different color and spectral changes, which could be quantitatively analyzed in terms of unique spectral patterns by principal component analysis. With the colorimetric sensor array employed here, the fluctuation of Aβ42% in different brain regions of rats exposed to Cd2+ could be directly monitored. The downward trend of Aβ42% accompanied by variations of other biochemical indicators suggested that subchronic Cd2+ exposure possibly triggered the onset of AD through the intervention of lipid peroxidation pathway. Furthermore, in vivo monitoring the downtrend of Aβ42% in cerebrospinal fluid (CSF) could also be realized, which offers a great opportunity for early diagnosis and treatment of AD that may be induced by environmental factors with CSF Aβ42% as a reliable indicator.
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PubMed
INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Jie Wang,Ya-Nan Yu,Rou Huang,Ce Wang,Zheng Yin
Mix-ligands strategy is highly efficient for the rational construction of MOFs with particular structure motifs and high porosity, yet challenging and requiring matching in hierarchical coordination assembly and synergetic crystallization. The solvothermal reactions of 1,3,5-tris[4-carboxyphenyl]benzene (H 3 btb) and 1,4-benzenedicarboxylic acid (H 2 bdc) with different 3d metal ions , generated highly porous mixed-ligands MOFs of [(CH 3 ) 2 NH 2 ] 2 [Mn 3 (btb) 2 (bdc)]·12DMF·3MeOH ( Mn-btb-bdc ) having anionic 3D frameworks constructed from linear [Mn 3 (COO) 8 ] nodes, [Co 4 (btb) 2 (bdc)(H 2 O) 3 ]·15DMF·7H 2 O ( Co-btb-bdc ) processing neutral frameworks constituted by linear [Co 3 (COO) 6 (H 2 O) 4 ] and paddle-wheel [Co 2 (COO) 4 (H 2 O) 2 ] nodes, as well as one single-ligand MOFs of [(CH 3 ) 2 NH 2 ][Cd(btb)(H 2 O)]·8DMF ( Cd-btb-2fold ) exhibiting 2-fold interpenetrated ths net frameworks due to the unsuccessful introduce of the coexisted bdc ligand. Two new topology net of 2,3,8-connected net with point symbol of (4 2 ·6) 2 (4 4 ·6 6 ·8 12 ·10 5 ·12)(6) and 2,3,4,6-connected net with Point Symbol of (4·8 2 ) 4 (4 2 ·8 11 ·10 2 ) 2 (8 4 ·12 2 )(8 2 ) were found for Mn-btb-bdc and Co-btb-bdc . All these three MOFs are highly porous with void fractions of 60.9%, 52.2% and 61.4%, stemming from 3D-penetrated, 3D-penetrated and 1D channels, respectively. Such structural differentiations are attributed to the diversified electronic structure and coordination preference of different 3d metal ions, as well as the solvent template and temperature effects. Two-steps gate-opening behaviour in gas sorption isotherms was found in the flexible Mn-btb-bdc MOFs.
研究领域:
材料科学
·
化学
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高影响因子
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