Talanta Open
·
2022
·
IF 0
Jinping Yue,Qing Lv,Wan Wang,Qing Zhang
In this work, a new paper-based device (PAD) was developed for the colorimetric detection of multiple heavy metals. The sensing principle of this PAD is based on the analyte-regulated photocatalytic activity of quantum dots (QDs) to certain substrates. The PAD consisted of three filter paper layers, defining a sample area, three channels, and three testing areas. Three photocatalytic reactions between different QDs and their corresponding substrates could be performed in one device, achieving the simultaneous detection of Cu(II), Mn(II), and Hg(II). The detection limits are 7.3 nM for Cu(II), 5.4 nM for Mn(II), and 8.1 nM for Hg(II), respectively. This PAD was applied to analyze real samples and the results were consistent with those obtained by inductively coupled plasma-optical emission spectrometer. This approach may provide a promising colorimetric sensing platform for multi-target analysis.
✓ 已验证
DOI
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Lijin Huang,Qin Shuai
Construction of adsorbents with specific porous structure and heteroatom doping is significant for enhancing adsorption performance toward the contaminants. However, it is still a crucial task for selective adsorption with high affinity and fast uptake kinetics. Herein, we present a facile and cost-effective postsynthesis modification approach to fabricate a novel effective sulfur-doped magnetic amide-linked organic polymer (S-MAOP), where AOP is chemically anchored on the surface of NH2-functionalized magnetic nanoparticles. The thionation process, e.g., transforming the amide group (−C═O–NH−) into the thioamide group (−C═S–NH−), was illustrated by treating the MAOP with Lawesson’s reagent. The resultant S-MAOP exhibited much higher adsorption selectivity and affinity for Hg(II) uptake from water solution than the initial MAOP due to introduction of thioamide groups in the network. In addition, by covalently anchoring polymer networks onto magnetic nanoparticles, recovery and regeneration of S-MAOP were greatly facilitated due to its good superparamagnetism. Furthermore, it also showed superior stability, of which the adsorption capacity was well maintained even after 5 cycles. The remarkable adsorption performance, good cycling stability, and cost-efficient synthesis make S-MAOP a desirable adsorbent for contaminant removal.
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Jian Zeng,Qunhua Zhou,Xinping Bai,Ziye Li,Tuanyu Guo,Zesheng Zhuo,Zhenzhen Cai
A novel core-shell MIP-203-SH@DMSN S -SH composite with excellent Hg(II) adsorption is synthesized. • A maximum of Hg(II) adsorption capacity of 517.0 mg/g is achieved within 2 min. • Hg-S/Hg-O chemisorption plus hierarchical pores enable ultra-fast kinetics. • pH adaptability, anti-interference ability and reusability support practical application. The safety of water is facing severe challenges due to heavy metal pollution. Mercury, which is highly toxic and bioaccumulative, has become a global threat. The development of advanced adsorbents with high capacity, good chemical stability, and efficient removal for Hg(II) removal remains a major challenge in water remediation. In this study, a novel core-shell composite with thiol-functionalized dendritic mesoporous silicon nanospheres (DMSN S -SH) as the core and zirconium-based metal-organic framework (MIP-203-SH) as the shell was synthesized by hydrothermal method. The optimized composite presents a unique walnut kernel-like structure with high specific area and hierarchical pore structure, which significantly improves the accessibility of active sites. The material exhibited excellent adsorption performance with a maximum adsorption capacity of 517.0 mg/g at 298 K. The dendritic mesoporous architecture of the support provided mass transfer channels, which led to remarkably fast adsorption kinetics and achieved removal rate of 90% within 2 min. The adsorption process fits well with the Sips isotherm pseudo-second-order kinetic model, indicating the existence of a monolayer chemisorption mechanism on the heterogeneous surface. X-ray photoelectron spectroscopy further confirmed that the adsorption mechanism was mainly driven by the strong coordination of Hg(II) with thiol and hydroxyl groups (forming Hg S and Hg O bonds), as well as electrostatic interactions. Furthermore, the adsorbent material exhibited excellent stability over a wide pH range (1–7), selectivity, and regeneration, maintaining high removal rate of 99.7% in actual industrial wastewater containing Hg(II). This study provides a new strategy for developing Hg(II) adsorption materials with fast, efficient and good adaptability, but also offers important theoretical basis and technical support for the Hg(II) treatment in wastewater. Download: Download high-res image (144KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Chengyue Yang,Yuxin Sun,Peilin Xue,Yu Sun,Jiwei Wang,Jianshe Hu,Hao Yang
Defect engineering in metal-organic frameworks (MOFs) is critical for enhancing their adsorption performance. Herein, a “large-pore” UiO-66-SH (LP-UiO-66-SH) was successfully synthesized by introducing the monodentate ligand 3-amino-4-hydroxybenzoic acid (3,4-AHBA) into UiO-66-SH. This strategy generates ligand defects and creates opens metal vacancies, thereby enhancing the porous structure and the density of active sites. Consequently, LP-UiO-66-SH exhibited significantly superior adsorption kinetics and capacity compared to micro-UiO-66-SH, achieving a maximum Hg(II) uptake of 1180 mg g −1 (versus only 560 mg g −1 for micro-UiO-66-SH under comparable conditions) and rapidly reducing the Hg(II) concentration in seawater to the drinking water standard (0.002 mg L −1 ) within 8 min. DFT and molecular dynamics (MD) simulations further revealed that S H, -NH₂ and -OH groups cooperatively participate in Hg(II) binding, while the presence of a porous architecture significantly improved adsorption kinetics across a wide range of initial Hg(II) concentrations. This study provides a defect-engineering strategy for designing efficient porous adsorbents for mercury-contaminated water remediation and, through combined experimental and theoretical analyses, elucidates the intrinsic coupling mechanism between defect-induced binding sites and ion transport within the engineered framework.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Hui Cao,Run Gao,Lin Chen,Zixia Huang,Xiuxiu Wu,Jinsong Yu,Fei Xu
Hg(II) is a widespread environmental contaminant with high toxicity and severe adverse effects on human health. Although aptamers are commonly used as recognition elements for Hg(II), their binding performance is highly susceptible to pH. In this study, we designed a dual-functional Hg(II)-specific aptamer and developed a biosensor based on Tb(III)-DNA self-assembled coordination polymers (Tb-DNA CPs) for the rapid detection of Hg(II). In the designed aptamer, the G-rich region functions as a luminescent antenna ligand to sensitize Tb(III) emission, while the T-rich region serves as the Hg(II) recognition unit. The resulting Tb-DNA CPs retained 90.2% of their original fluorescence intensity after 30 days in aqueous solution and demonstrated high stability over a broad pH range (pH 4–11). This improved stability is attributed to the role of Tb(III) as a structural crosslinker that promotes the assembly of coordination polymers. The sensor exhibited a limit of detection (LOD) of 3.89 nM for Hg(II), with a linear response range of 5 to 250 μg·L −1 . In vegetable samples, Hg(II) was rapidly quantified with recoveries of 96.49% to 113.40% and RSDs of 1.98%–4.83%. Mechanistic analysis indicated that the sensing response of the Tb-DNA CPs was mainly driven by photoinduced electron transfer (PET) and Hg(II)-induced conformational changes. This work overcomes the pH-dependent limitation of conventional aptamer-based sensors and provides a practical platform for on-site Hg(II) monitoring. The Tb-DNA CP strategy also offers a versatile foundation for the development of stable lanthanide-based biosensors.
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Lingyi Zhao,Jumei Li,Jinlei Xu,Xinjian Cheng
Dendritic fibrous nanomaterials play an important role in the adsorption of heavy metals. The introduction of fluorescent groups on the dendritic fibrous nanosilica (DFNS) will endow it with the ability to recognize and adsorb heavy metals. In this work, DFNS was first prepared as starting materials. Then, it was chemically modified with vinyltriethoxysilane (VTES) to make its surface rich in C═C double bonds. At the same time, the RAFT reagent (Br-CTA-CH═CH2) containing -Br and C═C double bond was synthesized. In addition, fluorescent monomers Naph-CH═CH2 and BT-CH═CH2 were synthesized by introducing C═C double bonds on naphthalimide and benzothiazole, respectively. Then, Naph-CH═CH2, BT-CH═CH2, and Br-CTA-CH═CH2 were subjected to RAFT polymerization to obtain fluorescent hyperbranched polymers (FL-HBPs) containing Br groups. Finally, FL-HBPs were loaded onto the surface of CH2═CH-DFNS by Heck reaction to obtain organic–inorganic composite microspheres (FL-HBP-DFNS). The microspheres can sensitively identify and efficiently separate Pb2+/Hg+. The probe exhibits fluorescence enhancement of the Pb2+/Hg+ ions. The limit of detection (LOD) reaches 1.04 nM and 2.46 nM, respectively. Moreover, the adsorption efficiency of Pb2+ reaches 99.7%, and the adsorption capacity is 157.5 mg/g. Therefore, FL-HBP-DFNS can play effective roles in the identification and removal of heavy metals.
✓ 已验证
DOI
高影响因子
PHYSICAL REVIEW B
·
2025
·Vol. 111
·期 13
·134401
·
IF 3.7
M. Y. Cui,Z. Y. Zhao,Z. Y. Wu,J. F. Wang,Z. Z. He
Chemical substitution is an effective route to manipulate the magnetic exchange couplings and modify the magnetic properties. However, replacement between ${\mathrm{Cd}}^{2+}$ and ${\mathrm{Hg}}^{2+}$ cations, both belonging to IIB group in the periodic table but having quite close ionic radii, is rarely studied. In this work, the chemical-pressure effect in $A{\mathrm{Co}}_{2}({\mathrm{Te}}_{3}{\mathrm{O}}_{8})({\mathrm{SO}}_{4})\phantom{\rule{4pt}{0ex}}(A=\mathrm{Hg},\mathrm{Cd})$ is reported, which is an $S=1/2$ structural screw-chain antiferromagnetic series with two unique Co positions. Magnetic susceptibility, specific heat, and high-field magnetization measurements on both polycrystal samples suggest that Hg compound experiences two successive antiferromagnetic transitions at ${T}_{\mathrm{N}1}=25.5\phantom{\rule{4pt}{0ex}}\mathrm{K}$ and ${T}_{\mathrm{N}2}=21.5\phantom{\rule{4pt}{0ex}}\mathrm{K}$ in zero field, and multiple field-induced transitions at ${B}_{1}=10.5\phantom{\rule{4pt}{0ex}}\mathrm{T}, {B}_{2}=13\phantom{\rule{4pt}{0ex}}\mathrm{T}$, and ${B}_{3}=19.5\phantom{\rule{4pt}{0ex}}\mathrm{T}$ at 1.6 K. By contrast, a single magnetic transition takes place at ${T}_{\mathrm{N}}=20$ K and ${B}_{\mathrm{c}}=10.7\phantom{\rule{4pt}{0ex}}\mathrm{T}$ in Cd compound. Different twists of ${\mathrm{CoO}}_{6}$ octahedra are discussed to be responsible for the distinct magnetic behaviors. To further understand the influence of the chemical pressure, additional anisotropic characterizations are performed on Hg single crystal and subsequently the magnetic field $\mathrm{versus}$ temperature phase diagrams are established. Large magnetic anisotropy is observed with the moments lying within the $bc$ plane. Besides, a possible field-induced order-disorder transition is uncovered under the application of a magnetic field along the $b$ axis. The opposite features of the anisotropic magnetic susceptibility in Hg compound might demonstrate separate antiferromagnetic orders of the two Co sublattices, the discrepancy of which is reduced due to the weakened twist of ${\mathrm{CoO}}_{6}$ octahedra in Cd compound, leading to a simultaneous occurrence of these transitions instead.
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Kaiqi Liu,Luminita Marin,Xinjian Cheng
In this work, fluorescent β- cyclodextrin (β-CD) based probes containing naphthalimide group were synthesized to realize the specific recognition of Hg 2+ /Hg + in aqueous system. Firstly, three small fluorescent molecules (N1, N2 and N3) with -NH 2 groups were synthesized from 4-bromo-1, 8-naphthalene anhydride . Secondly, CH CCH 2 - group was introduced into β-CD by Williamson ether formation reaction. Finally, the target probes (β-CD-PI, β-CD-PY and β-CD-TP) were obtained by Amino-Yne click reaction. These probes can efficiently recognize Hg 2+ /Hg + . β-CD-PI emits bright yellow fluorescence after binding with Hg 2+ /Hg + , which is a turn-on fluorescent probe . When the Hg 2+ /Hg + concentration exceeds 26 μM, the fluorescence intensity amplifies sharply (20 folds). The hydrophobic parts of the probes aggregated together to form a micelle-like structure due to complexation with Hg 2+ /Hg + , resulting in special micelle-sensitizing properties. Meanwhile, the HOMO-LUMO energy levels of the probes were calculated by cyclic voltammetry (CV). The probe is expected to be used for the detection of Hg 2+ /Hg + in aqueous solutions without any organic solvents.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
·
2023
·Vol. 38
·期 10
·2127-2133
·
IF 3.4
Shihao Wu,Linpei Dong,Jiahua Ji,Peng Zhao,Ge Song,Xiaojun Wu,Jifen Wang,Yunfeng Zhang,Jingjing Wang
Monochromatic excitation X-ray fluorescence (ME-XRF) spectrometry is an emerging technique for elemental analysis with many potential forensic applications. In this study, a method for rapid and efficient quantification of As, Hg, Tl, and Pb in biological tissues using ME-XRF was established and applied to actual cases. The instrument's operating conditions were optimized, and the optimum method for sample preparation was determined. According to the calibration curves of each element, a new model for the detection of biological tissues was developed based on the fundamental parameter (FP) method. The LOD values of As, Hg, Tl, and Pb were 0.04, 0.04, 0.06, and 0.07 μg g−1, respectively. Through systematic evaluation and validation, the feasibility of using ME-XRF in forensic toxicology analysis was confirmed.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Dongmin Zhao,Zhuoyan Li,Kaini Zhu,Ai Lu,Ying Wang,Jingjing Jiang,Cong Tang,Xing-Can Shen,Changping Ruan
Owing to the strong Hg−Se interaction, Se-containing materials are promising for the uptake and immobilization of Hg(II) ions; compared with metal selenides or selenized compounds, elemental Se contains the highest ratio of Se. However, it remains a challenge to fully expose all the potential Se binding sites and achieve high utilization efficiency of elemental Se. Through rational design on the structure, dispersity, and size of materials, Se/CNF aerogels composed of abundant well-dispersed and amorphous nano-Se have been prepared and applied for the high-efficient uptake and immobilization of Hg(II) ions. The well-dispersion of nano-Se increases the exposure of Se sites, the amorphous structure benefits the easy cleavage of Se−Se bonds, the 3D porous networks of aerogels permit fast ions transport and easy operation. Benefiting from the combination effect of strong Hg−Se interaction and sufficient exposure of Se-enriched sites, the Se/CNF aerogels demonstrate strong binding ability ( K d = 3.8 ×10 5 mL·g -1 ), high capacity (943.4 mg·g -1 ), and preeminent selectivity ( α M Hg > 100) towards highly toxic Hg(II) ions. Notably, the utilization efficiency of Se in Se/CNF aerogels is as high as 99.5%. Moreover, the strong Hg−Se interaction and extraordinary stability of HgSe could minimize the environmental impact of the spent Se/CNF adsorbents after its disposal.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Meng Li,Xiaoning Li,Mengwen Xu,Bowen Liu,Mengqing Yang,Zhijun Chen,Tianchu Gao,Tony D. James,Lidong Wang,Huining Xiao
Mercury ions are one of the most toxic heavy metals and as such they can cause serious risk to the human body and environmental ecosystem. To effectively detect and remove Hg 2+ from contaminated water, a new cellulose-based fluorescent hydrogel has been fabricated using a ratiometric probe with carbon dots as energy donor and rhodamine moiety as energy acceptor (CDs-Rho). The probe exhibits a sensitive and linear response to Hg 2+ over a wide range from 0–100 μM with a limit detection of 2.19 × 10 −9 M and exhibits high selectivity for Hg 2+ over other cations. In addition, a series of cellulose-based fluorescent hydrogel slices containing CDs-Rho are continuously prepared using microtomy of a hydrogel, facilitating the large-scale fabrication of functionalized hydrogel slices with controlled thickness. The cellulose-based CDs-Rho (CCR) hydrogel exhibits good sensitivity and excellent adsorption capacity for Hg 2+ with ~95% removal efficiency, meeting the requirements for sewage discharge. Moreover, the purified water is successfully used for cell culture and animal growth, demonstrating excellent biocompatibility. Our approach is expected to offer a novel concept for the construction of biocompatible fluorescent hydrogels for the detection of various metal ions and removal by simply swapping the current probe with suitable replacements for a variety of relevant applications.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Yu Sun,Ying Wu,Yong Fu,Chengyue Yang,Jinwen Jiang,Guiyang Yan,Jianshe Hu
In this study, a new tannic acid cross-linking cellulose/polyethyleneimine functionalized magnetic composite (MCP) as a biomass adsorbent of Hg(II) ions was prepared. The morphology and structure of MCP were characterized with FT-IR, TG, XRD, SEM and TEM . The effect of the different factors such as pH, contact time, initial Hg(II) ion concentration, and adsorption temperature on the adsorption behavior was investigated. The results showed that MCP exhibited an excellent selectivity and reutilization, fast removal rate, and very high adsorption capacity. The corresponding adsorption capacity and removal rate of could reach 99.00% and 247.51 mg/g when the pH value, adsorption time, Hg(II) ion concentration were 5, 180 min and 100 mg/L at 293 K. The kinetics followed the pseudo-second-order, which indicated that the adsorption behavior of MCP for Hg(II) ion belonged to the chemical adsorption process and external diffusion. The thermodynamic study showed that the adsorption process was a spontaneous and exothermic process. After the fifth adsorption-desorption experiment, it still had better adsorption performance and reutilization. All in all, MCP with highly stable and efficient, as well as excellent reusability will be a candidate for industry-level applications from wastewater with Hg(II) ions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）