CHEMOSPHERE
·
2022
·
IF 8.943
Gufeng Li,Mingrong Lu,Shaoqing Li,Min Yang,Yuanling Zhang,Yanli Zhang,Hongbin Wang,Wenrong Yang
Mercury ion (Hg 2+ ) is a heavy metal pollutant that can affect the safety of water environment and endanger human health. A novel detection strategy (GNPs- L -Cys-Rh6G2) for Hg 2+ based on a fluorescence “OFF-ON” was proposed. Gold nanoparticles (GNPs) were assembled with l -cysteine ( L -Cys), which was used as a “bridge” to link with rhodamine 6G derivatives (Rh6G2). The fluorescence state transition of GNPs- L -Cys-Rh6G2 switching from “OFF”-“ON” was observed because Hg 2+ opened the spirolactam ring through a catalytic hydrolysis mechanism. The fluorescence signal of the GNPs- L -Cys-Rh6G2 system mixed with Hg 2+ in the concentration range of 10–100 μM was analyzed and determined with a limit of detection (LOD) of 2 μM ( S/N = 3). Moreover, the spiked Hg 2+ concentration in real water samples were successfully quantified by GNPs- L -Cys-Rh6G2, which was in line with the ideal average recovery rate and relative standard deviation. The proposed strategy exhibited high specificity, sensitivity and stability, providing a novel sensing platform for heavy metal ions detection in water environment.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Qi Wang,Tao Wang,Han Lin,Weiqiang Meng,Chunfeng Zhang,Pingru Cai,Tingting Hao,Yangbo Wu,Zhiyong Guo
ABSTRACT A disposable Faraday cage-type aptasensor for ultrasensitive determination of sub-picomolar Hg(II) was developed based on fast scan voltammetry (FSV). Signal unit [email protected] was designed, in which aminoferrocene (AFc) is the signal label, gold nanoparticles (AuNPs) improve the conductivity of rGO and combine DNA through Au-S bond, DNA could selectively capture Hg(II) with DNA3 through the formation of thymine-Hg(II)-thymine (T-Hg(II)-T) complex, and rGO provides the basis for loading above functional components. In presence of Hg(II), the signal unit could be immobilized on the disposable electrode through T-Hg(II)-T mismatch to build a Faraday cage-type aptasensor, and the scan rate of 400 V/s was used by FSV, resulting in ultrasensitive determination of Hg(II) in concentration range from 0.1 μmol/L to 0.1 pmol/L with a limit of detection (LOD) 0.03 pmol/L. The sensitivity is greatly improved due to the following points: a large number of signal labels AFc are immobilized, conductive rGO allows all AFc immobilized to participate in the electrode reaction, and a high scan rate is used. Satisfied stability, selectivity and accuracy were obtained. Thus, this proposed disposable Faraday cage-type aptasensor provides a new path to ultrasensitive on-site rapid determination of Hg(II) or analog heavy metal ions.
研究领域:
分析化学
·
环境科学
·
纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2017
·
IF 2.536
Jian Zhu,Zhu-Jun Zhao,Jian-Jun Li,Jun-Wu Zhao
Mercury ions-induced fluorescence quenching properties of CdTe quantum dots (QDs) have been studied using the fluorescence spectroscopic techniques. By using the hydrothermal method , the CdTe QDs with different particles sizes from 1.98 to 3.68 nm have been prepared, and the corresponding fluorescence emission wavelength is changed from 518 to 620 nm. The fluorescence of QDs is enhanced after linking Bovine serum albumin (BSA) onto the surface of the QDs. Experimental results show that the fluorescence intensity of BSA-coated CdTe QDs could be effectively quenched when Hg 2 + react with BSA-coated CdTe QDs. Interestingly, both the sensing sensitivity and selectivity of this fluorescence probe could be improved when the particle size of the QDs decreases. Thus the BSA-coated CdTe QDs with green fluorescence emission have better advantages than the BSA-coated CdTe QDs with red fluorescence for Hg 2 + detection. Interference experiment results indicate that the influence from other metal ions could be neglected in the detection, and the Hg 2 + could be specifically detected. By using this BSA-coated CdTe QDs-based fluorescence probe, the Hg 2 + could be detected with an ultra-low detection limit of nanomole level, and the linear range spans a scope from 0.001 to 1 μmol/L.
研究领域:
分析化学
·
环境科学
·
生物医学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Ling Zhang,Jinghua Zhang,Xinglin Li,Cuijie Wang,Ajuan Yu,Shusheng Zhang,Gangfeng Ouyang,Yuanyuan Cui
Herein, a porous core-shell copper hydroxy sulfate@metal-organic framework decorated by 2,5-dimercapto-1,3,4-thiadiazol (DMTZ) was synthesized via a facile self-template strategy for the capture of Hg 2+ . The strategy of assembling MOF shell on copper hydroxy sulfate (CHS) core avoided the self-nucleation of MOF(Cu 3 (BTC) 2 ) in the solution and complex multistep procedures by means of in situ transformation the metal source CHS into well-defined Cu 3 (BTC) 2 crystal. The structure and properties of the DMTZ modified CHS@Cu 3 (BTC) 2 (CHS@Cu 3 (BTC) 2 -DMTZ) was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA) and N 2 sorption–desorption isotherms (BET). The adsorption behavior followed Langmuir adsorption model and the maximum adsorption capacities for the removal of Hg 2+ was up to 627.6 mg g −1 . 99.96% Hg 2+ was rapidly captured by CHS@Cu 3 (BTC) 2 -DMTZ within 10 min from 40 mg L -1 to 0.014 mg L -1 . Meanwhile, not only X-ray photoelectron spectroscopy (XPS) but also Raman spectra verified the selective and strong interaction between Hg 2+ and thiol/nitrogen-containing functional groups of DMTZ on CHS@Cu 3 (BTC) 2 -DMTZ. These results manifested that this novel thiol-functionalized MOF adsorbent had superior adsorption capacity and selective for Hg 2+ .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2018
·
IF 4.005
Zhongbo Shang,LiWen Zhang,Xuyang Zhao,Shanhu Liu,Deliang Li
A low-cost mercapto-modified coal gangue (CG-SH) was fabricated by modification of coal gangue (CG) with (3-mercaptopropyl) trimethoxysilane. The structure and composition for as-prepared CG-SH were characterized by using X-ray diffraction (XRD), Fourier transfer infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and X-ray fluorescence (XRF). Results indicated that larger amounts of mercapto-groups (-SH) was successfully introduced onto CG, which followed by acted as active sites for the removal of heavy metal cations, such as Pb(II), Cd(II) and Hg(II). The factors that affected the adsorption equilibrium as well as the removal efficiency, i.e., contact time, initial concentration, pH and temperature, were investigated in detail. The adsorption isotherms for Pb(II), Cd(II) and Hg(II) were well fitted with Langmuir model. The maximum adsorption capacity of CG-SH for Pb(II), Cd(II) and Hg(II) were calculated to be 332.8, 110.4 and 179.2 mg g −1 , respectively. The adsorption for Pb(II), Cd(II) and Hg(II) on CG-SH could be well described by pseudo-second-order kinetic model . And thermodynamic analysis suggests that the adsorption process for Pb(II) is exothermal, while that for Cd(II) and Hg(II) are endothermal. The results suggest CG-SH have great potential to be used as efficient absorbent for the removal of heavy metal cations from water.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jie Chen,Wen Zeng,Huiyao Huang,Xiaoyu Lou,Song Chen,Changshen Ye,Zhixian Huang,Ting Qiu
Conjugated micro-mesoporous poly(aniline)s (CMPAs) synthesized through Buchwald-Hartwig coupling represent a cutting-edge material platform for selective sequestration of Hg (II) but suffer from moderate porosities and constrained availability of adsorption sites. Herein, we show a salt strategy for fine-tuning the porosity and Hg (II) adsorption performance of a series of S, N dual heteroatom functionalized CMPAs (CMPA-SN). The salt of NaF with appropriate dosage results in strikingly improved surface areas from 26 to 735 m 2 /g and intensified Hg (II) adsorption capacity from 311 mg/g to 649 mg/g. Moreover, CMPA-SN exhibits an efficient adsorption rate ( h = 1250 mg/g/min) and excellent affinity with high K d as high as 1.24 × 10 6 mL/g. We successfully correlate the adsorption capacity and surface area, and reveal the synergistic electron-sharing mechanism from N-containing ligands and in-situ decorated S heteroatoms, with 67.6 %/32.4 % contributions and Δ E ads = -0.419 eV/Δ E ads = -0.487 eV adsorption energy.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2015
·
IF 3.368
Lytuong Tran,Pingxiao Wu,Yajie Zhu,Lin Yang,Nengwu Zhu
Vermiculites modified with Mercaptoethylamine (MEA) and 3-Mercaptopropyltrimethoxysilane (MPTMS) were used as effective adsorbents for the removal of Hg(II) from aqueous solution. The physicochemical characteristics of the pristine and functionalized vermiculites were analyzed by XRD, BET, FTIR, SEM, TEM and Zeta potentials, confirming that the vermiculite was successfully functionalized by the organic ligands containing the thiol (SH) metal-chelating groups. Batch adsorption experiments demonstrated that the factors such as initial pH, contact time, temperature, coexisting cations and initial Hg(II) concentration could significantly influence the adsorption behaviors typically for VER and MEA-VER, whereas the adsorption capacity of MPTMS-VER showed negligible dependence on such factors. The maximum adsorption capacity of Hg(II) ions was greatly improved after functionalization, which was in the order of MPTMS-VER>MEA-VER>VER (286.29 μg g(-1), 176.33 μg g(-1), 99.95 μg g(-1), respectively). The adsorption isotherm could be well described with Langmuir model and the kinetic studies indicated that the adsorption process fitted well with the pseudo-second-order model. The calculated thermodynamic parameters suggested that the adsorption process was feasible and spontaneous. The adsorption mechanism of Hg(II) on thiol groups was studied through XPS analysis. Considering the favorable adsorption capacities, thiol-functionalized vermiculites show a promising application in the removal of Hg(II) from wastewater.
研究领域:
环境科学
·
材料科学
·
水处理
·
吸附技术
·
重金属去除
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Minghu Zhao,Zhen Huang,Shixing Wang,Libo Zhang,Yang Zhou
Mercury ions can cause a series of hazards to humans and the environment, even in trace amounts. Here, we designed a novel adsorbent (Cys-UiO-66) by functionalizing NH2-UiO-66 with l-cysteine for selective removal of Hg(II) from solution. The Cys-UiO-66 was characterized by different instruments. The adsorption property of Cys-UiO-66 was evaluated by batch methods. The maximum adsorption capacity was 350.14 mg/g at pH 5.0. Furthermore, the adsorption isotherm and kinetics models were in accord with the Langmuir and pseudo-second-order models, respectively, evidencing that the adsorption behavior was dominated by monolayer chemisorption. The Cys-UiO-66 had better affinity for Hg(II) than other coexisting ions in wastewater and could be regenerated for at least five cycles. The results prove that Cys-UiO-66 is a talented and efficient sorbent for mercury ions.
研究领域:
环境化学
·
材料科学
·
吸附技术
·
重金属去除
·
水处理
✓ 已验证
DOI
高影响因子
Green Energy & Environment
·
2021
·
IF 8.207
Yingjie Li,Songping Li,Xinyi Xu,Hong Meng,Yingzhou Lu,Chunxi Li
Adsorptive removal of heavy metal ions from wastewater is very important, and the key is the development of efficient sorbents. In this work, oxygenated alkynyl carbon materials (OACMs) were synthesized via mechanochemical reaction of CaC 2 and a carbonate (CaCO 3 , Na 2 CO 3 , or NaHCO 3 ) at ambient temperature. The resultant OACMs are micro mesoporous carbon nanomaterials with high specific area (>648 m 2 g −1 ), highly crosslinked texture, and rich alkynyl and oxygenated groups. The OACMs exhibit excellent Hg(II) adsorption due to the soft acid-soft base interaction between alkynyl and Hg(II), and OACM-3 derived from CaC 2 and NaHCO 3 has the saturated Hg(II) adsorbance of 483.9 mg g −1 along with good selectivity and recyclability. The adsorption is mainly chemisorption following the Langmuir mode. OACM-3 also shows high adsorbance for other heavy metal ions, e.g. 256.6 mg g −1 for Pb(II), 232.4 mg g −1 for Zn(II), and 198.7 mg g −1 for Cu(II). This work expands the mechnochemical reaction of CaC 2 with carbonates and possibly other oxyanionic salts, provides a new synthesis approach for functional alkynyl carbon materials with excellent adsorption performance for heavy metal ions, as well as a feasible approach for CO 2 resource utilization.
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
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Xinrong Liao,Guoqiang Yu,Ruiqing Luo,Qiang Wang,Chiyang He,Shaorong Liu
Simultaneously capturing organic pollutants and heavy metal can greatly reduce the water remediation time and cost, however it is still a great challenge presently. Herein, two novel thiol/methylthio–functionalized porous aromatic frameworks were synthesized as sorbents via the Sonogashira–Hagihara reaction of 1,3,5–triethynylbenzene and 1,3,5–tris(4–bromophenyl) benzene, the subsequent chloromethylation of the phenyl rings, and the final nucleophile substitution of –Cl groups by NaSH/NaSMe. These two sorbents were characterized by FT–IR spectra, energy dispersive X-ray spectra, scanning electron microscope , nitrogen adsorption analysis, thermo–gravimetric analysis, and elemental analyses. Adsorption experiments displayed that new sorbents had high uptake abilities and fast adsorption kinetics for aromatic pollutants and mercury (II) (Hg(II)). The maximum adsorption capacity ( Q max ) of toluene and m –xylene on both new sorbents were 531.9–571.4 mg/g with the kinetic binding rate constants ( k obs ) of 0.00276–0.02422 g/mg/min, and the Q max values of Hg(II) were 148.1–180.3 mg/g with k obs of 0.00592–0.01573 g/mg/min. Moreover, new sorbents indicated high simultaneous uptake abilities for these pollutants with good reusability, and finally they were successfully applied to the simultaneous remediation of these pollutants in two simulated sewages with high and low concentration, indicating their great practical application potential in wastewater remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2014
·Vol. 2
·期 37
·6371-6377
·
IF 0
Qingfeng Zhai,Siqi Zhang,Hong Jiang,Qin Wei,Erkang Wang,Jiahai Wang
In this article, we propose a new method for selective detection of Hg2+ based on a biomimetic nanopore sensing platform in combination with single-walled carbon nanotubes (SWNTs). As is well known, folded DNA in the presence of Hg2+ can be separated from single-stranded DNA through SWNTs, and the folded DNA can be quantitated with cone-shaped nanopore whose surface was coated by polyethyleneimine (PEI)/Zr4+. Both sensitivity and selectivity based on this paradigm can be guaranteed without immobilization of probes on the nanopore surface. This approach can warrant the detection limit for Hg2+ down to 8.3 nM (S/N = 3) with high selectivity against other metal ions. Moreover, the application of the sensor for lake water shows that the proposed method works well for real samples. This research demonstrates an alternative approach to detect targets of interest that holds high prospects for detecting other biomolecules or metal ions in the near future.
研究领域:
生物传感技术
·
环境监测
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Yanyan Wang,Meiyao Tang,He Shen,Guangbo Che,Yu Qiao,Bo Liu,Li Wang
In this paper, multifunctional inorganic–organic nanocomposites were fabricated through encapsulating CdTe quantum dots and Rhodamine 6G-deprived receptor into the nonporous and mesoporous shell of the magnetic mesoporous silica nanocomposites. The resultant nanomaterials display an obvious core–shell structure, superparamagnetic property, ordered mesoporous characteristics, and highly selective, sensitive, and regenerative ratiometric fluorescent sensing performance for determination of Hg2+. A good linearity is obtained between IRh6G/IQDs and Hg2+ concentration (0.7 to 90 × 10–8 mol·L–1), exhibiting a detection limit as low as 2.5 × 10–9 mol·L–1. Moreover, the multifunctional nanocomposites possess acceptable Hg2+ adsorption capacity and can be simply separated by magnet. Real water sample assays further verified its good mercury ion analysis and removal ability. Our results reveal that high sensitivity, selectivity, rapid adsorption, efficient removal ability, and good reusability as well as better accuracy can be simultaneously achieved by combining magnetic mesoporous silica nanocomposite with ratiometric fluorescence sensing properties than the traditional intensity-based fluorescence methods. This recyclable multifunctional hybrid nanostructure may have great potential for Hg2+ detection and removal in environmental, biological, and toxicological areas.
研究领域:
环境科学
·
分析化学
·
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）