JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
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2021
·Vol. 21
·期 4
·2117-2122
·
IF 0
Peng Zehui,Xue Yumeng,Gao Yuan,Wang Ka,Song Haizeng,Yan Shancheng
Heavy metal Cadmium (Cd) will continuously pollute the atmosphere, soil and various water environments through material circulation, and even pose a threat to human safety. It has been designated as a first-class pollutant in sewage by China, therefore there is an urgent need to find
new, more effective, and low-cost method to accurately detect Cadmium ion (Cd2+) concentration. We experimentally prepared a new Cd2+ sensor based on NiS2 nanomaterials capable of measuring Cd2+ concentration. The corresponding relationship between
over potential of NiS2 nanomaterials in H2SO4 electrolyte solutions with different Cd2+ concentration and reduction peak with change of Cd2+ concentration was obtained by electrochemical method.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
PubMed
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Yuntong Huang,Weizhong Chen,Mingyou Dong,Nana Li,Lianghui Chen,Li Ling,Qijiang Xu,Min Lin,Zhiyong Xing
A facile fluorescence probe BQBH was synthesized and investigated on its spectrum property. The result showed that the BQBH had high sensitivity and selectivity for Cd 2+ with lowest detection determined as 0.14 μM by fluorescence response. The 1: 1 binding ratio between BQBH and Cd 2+ was determined by Job’s plot, and the binding details were further confirmed by 1 H NMR titration, FT-IR spectrum and HRMS analysis. The applications including on test paper, smart phone and cell image were all also investigated.
研究领域:
分析化学
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生物医学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 70
·44054-44058
·
IF 3.108
Gai-Feng Kang,Yu-Zhen Wang,Yun-Feng Bai,Ze-Zhong Chen,Feng Feng
In this study, a label-free, specific and sensitive surface plasmon resonance (SPR) based competitive immunoassay was used for detecting Cd2+ in water samples. The standard curve of the method for Cd2+ was constructed in the concentration range of 0–1000 ng mL−1. The values of IC50 and the LOD of the assay were found to be 23.58 and 1.25 ng mL−1. No cross-reactivity was found with other metal ions except Hg2+. The proposed method provides an alternative method for sensitive, specific and real-time determination of Cd2+ in real aqueous samples.
研究领域:
分析化学
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环境科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2025
·
IF 2.9
Ji Xinyuan,Han Yuliang,Fang Jiahui,Tian Dating,Hu Sheng
In this study, a novel ion-imprinted polymer (IIP) was synthesized using attapulgite (ATP) and chitosan (CS) as the substrates and methyl methacrylate (MMA) as the monomer. The IIP (MMA) was characterized by FTIR, XRD, SEM, TEM, BET, and XPS. Orthogonal experiments were analyzed to show that when initial concentration of Cd 2+ was 100 mg/L, and the adsorption time was 20 min, under the condition of IIP (MMA) and NIP (MMA) on Cd adsorption capacity, were 57.56 mg/g and 52.03 mg/g, at the same time, the adsorption capacity of Se were 17.14 mg/g and 15.86 mg/g, far below the Cd adsorption capacity. The results showed that IIP(MMA) synthesized with ATP and CS as substrates and MMA as functional monomer has been successfully synthesized and can be used for selective adsorption of Cd 2+ in water. Graphical abstract
Illustration of the imprint polymerization process
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Ying Li,Huan Huang,Rongli Cui,Dongmei Wang,Zi Yin,Dan Wang,Lirong Zheng,Jing Zhang,Yidong Zhao,Hui Yuan,Jinquan Dong,Xihong Guo,Baoyun Sun
In this work, graphdiyne, a new kind of carbon allotrope composed of sp and sp 2 hybridized carbon atoms, firstly worked as an effective electrochemical sensor for the determination of low concentration of Cd 2+ and Pb 2+ in water using electrochemical pre-enrichment and anodic-stripping voltammetry methods. The limit of detection was 0.46 nM for Cd 2+ and 1.72 nM for Pb 2+ with a linear range extended from 0.01 μM to 1 μM. This graphdiyne modified electrode also presented excellent selectivity, stability, applicability and reproducibility, providing a simple and promising platform to develop novel electrochemical sensor for detecting Pb 2+ and Cd 2+ with higher performance. Through X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared (FTIR) and X-ray absorption near edge structure (XANES) characterization, it was verified that the acetylenic links in graphdiyne served as adsorbent sites by providing electrons to bind with heavy metal ions, which enhanced the electrochemical sensing performance.
研究领域:
分析化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Royal Society Open Science
·
2020
·Vol. 7
·期 10
·
IF 2.646
Zheng Wang,Xique Wu,Shengxu Luo,Yanshi Wang,Zhuang Tong,Qin Deng
Nanoscale zero-valent iron (NZVI) has a high adsorption capacity for heavy metals, but easily forms aggregates. Herein, preprocessed undulating venus shell (UVS) is used as support material to prevent NZVI from reuniting. The SEM and TEM results show that UVS had a porous layered structure and NZVI particles were evenly distributed on the UVS surface. A large number of adsorption sites on the surface of UVS-NZVI are confirmed by IR and XRD. UVS-NZVI is used for adsorption of Pb2+ and Cd2+ at pH = 6.00 in aqueous solution, and the experimental adsorption capacities are 29.91 and 38.99 mg g−1 at optimal pH, respectively. Thermodynamic studies indicate that the adsorption of ions by UVS-NZVI is more in line with the Langmuir model when Pb2+ or Cd2+ existed alone. For the mixed solution of Pb2+ and Cd2+, only the adsorption of Pb2+ by UVS-NZVI conforms to the Langmuir model. In addition, the maximum adsorption capacities of UVS-NZVI for Pb2+ and Cd2+ are 93.01 and 46.07 mg g−1, respectively. Kinetic studies demonstrate that the determination coefficients (R2) of the pseudo first-order kinetic model for UVS-NZVI adsorption of Cd2+ and Pb2+ are higher than those of the pseudo second-order kinetic model and Elovich kinetic model. Highly efficient performance for metal removal makes UVS-NZVI show potential application to heavy metal ion adsorption.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2014
·
IF 2.354
Yaohui Xu,Yang Zhou,Ruixing Li
An available route was provided for simultaneous detection and effective adsorption toward Cd 2+ , Zn 2+ and Cu 2+ . The magnetic Fe 3 O 4 @SiO 2 nanoparticles were prepared and functionalized with N-(quinoline-8-yl)-2-(3-triethoxysilyl-propylamino)-acetamide (QTPA) by first using the “grafting from” method, which made the whole process of surface modification on Fe 3 O 4 @SiO 2 nanoparticles simpler and more effective. The as-synthesized QTPA functionalized Fe 3 O 4 @SiO 2 nanoparticles exhibited different fluorescence responses for Cd 2+ (doderblue), Zn 2+ (deepskyblue) and Cu 2+ (tomato red) illuminated under a 365 nm UV light, while other ions, such as Ag + , Hg 2+ , Ni 2+ , Co 2+ , Mn 2+ , Pb 2+ , Cr 3+ and Fe 3+ , gave no visible changes under identical experimental conditions. The eye-perceived fluorescent changes only toward Cd 2+ , Zn 2+ and Cu 2+ could serve as the available proofs for the qualitative analysis of the three cations. The UV–vis spectra results showed that the multifunctional nanoparticles exhibited fluorescence enhancements for Cd 2+ and Zn 2+ , and fluorescence quenching for Cu 2+ . The adsorption experiments showed that the nanomaterial was a good candidate for selective removal and enrichment of Cd 2+ , Zn 2+ and Cu 2+ , and had the high adsorption efficiency toward Cd 2+ (95.29%), Zn 2+ (92.37%), and Cu 2+ (91.06%). Moreover, the functionalized composites had strong magnetic sensitivity, which could make them susceptible in an external magnetic field, and easy to separate from the solid and liquid phase. More specific to this work, simultaneous fluorescence determination of Cd 2+ , Cu 2+ , and Zn 2+ by naked eye was proposed based on QTPA functionalized Fe 3 O 4 @SiO 2 nanoparticles.
研究领域:
材料科学
·
分析化学
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产品关联
DOI
高影响因子
PLoS One
·
2014
·Vol. 9
·期 4
·e95242
·
IF 3.534
Hui-Xi Zou,Nan Li,Li-Hua Wang,Ping Yu,Xiu-Feng Yan
A fundamental investigation of the biosorption of Cd 2+ from aqueous solution by the edible seaweed Sargassum fusiforme was performed under batch conditions. The influences of experimental parameters, such as the initial pH, sorption time, temperature, and initial Cd 2+ concentration, on Cd 2+ uptake by S. fusiforme were evaluated. The results indicated that the biosorption of Cd 2+ depended on the initial Cd 2+ concentration, as well as the pH. The uptake of Cd 2+ could be described by the Langmuir isotherm model, and both the Langmuir biosorption equilibrium constant and the maximum biosorption capacity of the monolayer decreased with increasing temperature, thereby confirming the exothermic character of the sorption process. The biosorption kinetics follows the pseudo-second-order kinetic model, and intraparticle diffusion is the sole rate-limiting step for the entire biosorption period. These fundamental equilibrium and kinetic results can support further studies to the removal of cadmium from S. fusiforme harvested from cadmium-polluted waters.
研究领域:
环境科学
·
海洋生物学
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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Yufei Wang,Shuang Liu,Junyao Pan,Haoyang Zhang,Binyu Wang,Wenfu Yan
MER zeolite, a low-silica zeolite with an 8-membered ring aluminosilicate framework, has been recognized as a promising material in sorption, separation, and ion-exchange applications. Herein, we developed a cost-effective and rapid method to convert parent zeolite H-STI, which was derived from natural stellerite, into MER zeolite through interzeolite conversion with a crystallization time of 8 h. This MER zeolite exhibits high efficiency in removing Pb2+ and Cd2+ from simulated heavy metal wastewater over a pH range of 3–8. It also shows excellent selectivity in the presence of competitive cations, including Na+, K+, Ca2+, Mg2+, Zn2+, Cu2+, and Co2+. At 25 °C, with a MER-S dosage of 1/3000 g·mL–1 for Pb2+ and 1/500 g·mL–1 for Cd2+, the removal efficiencies were 99.7 and 99.9%, respectively. The distribution coefficients were 1097 L·g–1 for Pb2+ and 550 L·g–1 for Cd2+, and the sorption capacities reached 513 mg·g–1 for Pb2+ and 171 mg·g–1 for Cd2+, indicating that the product MER zeolite is one of the highest sorbents for Pb2+ and Cd2+ reported for zeolitic materials. The sorption for Pb2+ and Cd2+ both follows the chemisorption-dominated mechanism, driven by the ion-exchange process between the K+ in the channels MER-S and the Pb2+ or Cd2+ in solution. This work highlights the potential of rapidly synthesized MER zeolite for the effective removal of heavy metal cations, emphasizing its performance and practical applicability.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2019
·
IF 4.865
Jizhou Zhang,Xianfa Ma,Lei Yuan,Dongxing Zhou
Cd 2+ pollution in aquatic environments can pose a serious threat to human health. Biochar can remove Cd 2+ from aquatic environments, but the Cd 2+ adsorption capacity of conventional biochar is low, therefore, we focused on exploring the Cd 2+ adsorption capacity of modified biochar. In this study, KMnO 4 was used to modify vermicompost biochar (VBC), and static adsorption tests for Cd 2+ were carried out. The biochar properties and its adsorption efficiency toward Cd 2+ before and after modification were studied by kinetics and isotherm model fitting, scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). Additionally, an adsorption mechanism was discussed. The results showed that the KMnO 4 -modification resulted in a successful loading of the vermicompost biochar with MnO 2 , which greatly improved its adsorption capacity for Cd 2+ . The adsorption of Cd 2+ by VBC and MVBC was a spontaneous, endothermic, and monolayer chemical adsorption process . Mineral precipitation mechanism accounted for the largest proportion, and CdCO 3 was the main precipitate. After modification the proportion of surface precipitation and other mechanisms (π-electron coordination and the inner/outer sphere surface coordination) increased，while adsorption via cation exchange, oxygen-containing functional groups, physical adsorption and electrostatic attraction reduced. Hence, KMnO 4 modification has a significant effect on the Cd 2+ adsorption behavior of vermicompost biochar.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Dan Yue,Xin Zhang,Yiqun Tan,Zhenling Wang,Yilei Zhang
A novel two-photon fluorescent probe (ZC-F2) for selective recognizing Zn 2+ and Cd 2+ was designed and synthesized. By tuning the intramolecular charge transfer (ICT), ZC-F2 can recognize Zn 2+ and Cd 2+ through different emission colors in acetonitrile , the detection limit of Zn 2+ and Cd 2+ are 11.25 nM and 1.80 nM respectively. Moreover, ZC-F2 exhibits strong two-photon fluorescence emission when being excited by a femtosecond laser in the range of 700–860 nm, and its two-photon absorption (TPA) cross-section is studied. The cell-imaging experiments show that ZC-F2 has high sensitivity to Zn 2+ and Cd 2+ , indicating its potential applications in environmental and biological detection.
研究领域:
化学
·
生物检测
·
环境科学
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2017
·
IF 2.446
Tie Cong,Yadan Ding,Xueqing Yu,Yue Mu,Xia Hong,Yichun Liu
A series of Cd 2+ doped hexagonal-phase NaYF 4 : Yb 3+ , Er 3+ upconversion nanoparticles (UCNPs) were synthesized via solvothermal method, and the effect of Cd 2+ on the upconversion luminescence (UCL) properties was investigated in detail. It was found that the introduction of Cd 2+ could enhance the UCL intensities of NaYF 4 : Yb 3+ , Er 3+ UCNPs significantly. The maximum enhancement occurred when the doping concentration of Cd 2+ was 7 mol%. Compared with the UCNPs without Cd 2+ doping, the total integral emission intensity was enhanced by ∼38 times. It was related to the unit cell expansion and the generated F − vacancies, which could decrease the crystal symmetry around the Er 3+ ions. The results shall facilitate the improvement of UCL properties and the potential applications of UCNPs in lighting, solar cells, optics encoding and so on.
研究领域:
材料科学
·
纳米技术
·
光学
✓ 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）