JOURNAL OF MATERIALS SCIENCE
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2017
·Vol. 53
·期 3
·2277-2289
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IF 2.599
Meng Jian,Cui Jianlan,Yu Jing,Huang Wei,Wang Peng,Wang Kui,Liu Mingqiao,Song Changyuan,Chen Peng
Chitosan chains (CTS) were grafted onto polyvinyl alcohol fibers (PVAf) with the aid of coupling agent γ -glycidoxypropyltrimethoxysilane, producing grafted fibers PVAf- g -CTS. Then, chloroacetic acid (CA) was used to react with the chitosan chains on the PVAf- g -CTS surface via nucleophilic substitution reaction to produce fibrous PVAf- g -CACTS with multiple adsorption sites. The products were characterized by using FTIR, SEM, XRD and XPS, revealing that the reaction followed the S
N
2 mechanism. Optimum parameters, including a reaction temperature of 50 °C and a mass ratio of PVAf- g -CTS to CA of 1:0.12, were determined for the reaction. Adsorption experiments confirmed that PVAf- g -CACTS showed greater adsorption characteristics for Cd(II) in aqueous solutions compared with PVAf- g -CTS and PVAf. In particular, the rate of Cd(II) uptake by using PVAf- g -CACTS was higher, and the equilibrium was reached within 80 min. When pH was 7, the saturated adsorption capacity reached 47.65 mg g −1 . The adsorption kinetics conformed to the pseudo-second-order model, and the adsorption process was in accordance with the Langmuir and Temkin isotherm model. Adsorption–desorption cycle experiments showed that PVAf- g -CACTS had good performance of reuse, and the adsorption mechanism was analyzed further by using XPS.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2023
·
IF 4.8
Qi Guo,Yuhao Zhang,Luting Yan,Xiaoya Meng,Yue Wang,Hongguo Zhai,Xiaofeng Chen,Xia Sun,Yemin Guo,Yanyan Zhang
The use of low-cost working electrodes is of great importance for the development of sensor industrialization. Acupuncture needles electrode (ANE) was selected as working microelectrode, a sensor was designed based on poly(3,4-ethylenedioxythiophene)-polystyrene sulfonate (PEDOT: PSS) and chitosan (CS) modified covalent organic frameworks (COFs) (CS/COFs) for detection of cadmium (Cd(II)). First, a mixture of PEDOT and PSS was electrodeposited on the surface of the acupuncture needles to synthesize a PEDOT: PSS as conductive polymeric film to support the electron transfer capability and enhance the conductive efficiency of the sensor. Then, CS/COFs was self-assembled and attached to the PEDOT: PSS/ANE surface by π-π stacking intermolecular interaction forces and the viscosity of CS, thus increasing the specific surface area of the electrode. Differential pulse anodic stripping voltammetry (DPASV) was used as the electrochemical method for detection of Cd(II). And the results indicated that the CS/COFs/PEDOT: PSS/ANE was linearly responsive in the range of 400 μg/L to 2400 μg/L, and the LOD was 13.8 ng/L for Cd(II). The constructed sensor also showed great selectivity, reproducibility, and stability. Additionally, the sensor demonstrated outstanding recovery in the detection of Cd(II) in real sample scallops. This sensing construction method based on acupuncture needles as working electrodes is of great significance to the development of sensor industrialization and aquatic product safety detection.
研究领域:
分析化学
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环境科学
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食品安全检测
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2021
·
IF 3.196
Hang-Wei Wen,Huan Xia,Yin Yu,Xiaoyu He,Jiang Wang
This article has been retracted: please see Elsevier Policy on Article Withdrawal ( http://www.elsevier.com/locate/withdrawalpolicy ). This article has been retracted at the request of the Editor-in-Chief. In investigating concerns brought up regarding the authenticity of the article, the editors reached out to the corresponding author for an explanation and to request the original data. Per journal policy, the editors, at their discretion, may request deposition of any or all original data files for examination by the reviewers and/or editors. As a result of the author’s unsatisfactory explanation and failure to provide these data—in violation of journal policy—the editors feel that the findings of the manuscript cannot be relied upon. The corresponding author does not agree to this retraction.
研究领域:
化学
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材料科学
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医学
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产品关联
DOI
高影响因子
Arabian Journal of Chemistry
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2022
·
IF 6.212
Jiacheng Li,Lisha Liao,Yannan Jia,Tian Tian,Shiwei Gao,Chenyue Zhang,Wei Shen,Zheng Wang
In this study, the preparation of magnetic Fe 3 O 4 /ZIF-8 (MFZ) and its adsorption properties for Cd(II) from water were investigated. Various characterizations demonstrate that the as-prepared MFZ has well magnetic-separation performance and thermal stability. In batch adsorption tests, the effects of pH, initial concentration, and adsorbent dosage were evaluated. According to the findings, when the pH is 7 and the dosage is 150 mg/L, the adsorption capacity for a 40 mg/L Cd(II) solution reaches 102.3 mg/g in 180 min. The Cd(II) adsorption processes was found to correspond to pseudo-first-order kinetics and Langmuir model according to the adsorption kinetics and isotherms. The Langmuir model predicted a maximal saturation adsorption capacity of 160.26 mg/g at 298 K. Thermodynamic analysis revealed that the Cd(II) adsorption is an endothermic, spontaneous process. Ion exchange, coordination reaction, and electrostatic interaction are all involved in Cd(II) adsorption by MFZ. The optimum conditions for Cd(II) adsorption were proposed and confirmed in accordance with the results of the response surface optimization experiments. Furthermore, regeneration tests demonstrate the great repeated regeneration ability of MFZ. According to the anticipated production cost, treating wastewater with a Cd(II) concentration of 40 mg/L would cost roughly US$ 8.35/m 3 . MFZ showed good potential for Cd(II) removal from water.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2017
·
IF 2.538
Shuangzhen Guo,Pengpeng Jiao,Zhigang Dan,Ning Duan,Jian Zhang,Guanyi Chen,Wubin Gao
A novel l -arginine modified magnetic bioadsorbent (Fe 3 O 4 -CS-L) was fabricated to remove Zn(II), Cd(II) and Pb(II) from aqueous solution by adsorption method. Several techniques such as FT-IR, SEM, XRD, TGA and VSM were used for characterizing the Fe 3 O 4 -CS-L. The results showed that the Fe 3 O 4 -CS-L was successfully prepared. Batch experiments were conducted to investigate the parameters affecting the adsorption of the novel magnetic bioadsorbent to metal irons, such as adsorption isotherm and adsorption kinetics. The adsorption equilibrium was commendably described by pseudo-second-order model. Langmuir model was better than Freundlich model to describe adsorption isotherm data and the predicted maximum adsorption capacities of Zn(II), Cd(II) and Pb(II) were 256.41 mg/g, 156.99 mg/g and 128.63 mg/g, respectively. Competition adsorption results showed that the adsorption order of Fe 3 O 4 -CS-L to metal ions was Pb(II) > Zn(II) > Cd(II). Moreover, regeneration studies suggested that Fe 3 O 4 -CS-L has a good recyclability. All the results showed that Fe 3 O 4 -CS-L could be a promising material in environment pollution cleanup.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Desalination and Water Treatment
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2014
·
IF 0.987
Feng Zhang,Manman Wang,Limei Zhou,Xiaoyan Ma,Yafen Zhou
Cross-linked chitosan–zeolite composite was prepared and characterized by Fourier transform infrared spectroscopy and scanning electron microscope. Adsorption of Cd(II) by the cross-linked chitosan–zeolite composite as a function of solution pH, contact time, initial Cd(II) concentration, and temperature was investigated systematically by batch experiments. The obtained results showed that the removal of Cd(II) was pH dependent and the optimum adsorption was achieved at pH 7.0. The adsorption process could be described by pseudo-second-order kinetic model. Thermodynamic parameters revealed the spontaneous and endothermic nature of the adsorption. The batch adsorption data could be well elucidated by the Langmuir model. The maximum adsorption capacity of Cd(II) on the cross-linked chitosan–zeolite composite at 25°C determined from the Langmuir model was 102.15 mg/g. The adsorbent was successfully regenerated using EDTA, HNO3, and HCl solution as desorbent, respectively.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2021
·
IF 3.498
Li-Hong Huang,Li-Ping Liu,Fu-Gang Chen,Yuan-Shu Hui
This article has been retracted: please see Elsevier Policy on Article Withdrawal ( http://www.elsevier.com/locate/withdrawalpolicy ). This article has been retracted at the request of the Editor-in-Chief. In investigating concerns brought up regarding the authenticity of the article, the editors reached out to the corresponding author for an explanation. The corresponding author failed to provide a satisfactory explanation. The editors therefore feel that the findings of the manuscript cannot be relied upon and that the article needs to be retracted.
研究领域:
无机化学
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材料科学
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生物医学工程
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DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
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2014
·Vol. 25
·期 3
·535-543
·
IF 1.077
Zhou Yong-Hong
Three new multi-dimensional coordination polymers, namely, [Cd(SIP)(HBPP)(BPP) 0.5 (H 2 O)·H 2 O] n ( 1 ), [Zn(L)(BIB) 0.5 ] n ( 2 ), and {[Cd 2 (L) 2 (BIB) 2 ](H 2 O) 7 } n ( 3 ) (H 3 SIP = 5-sulfo-1,3-benzenedicarboxylate, BPP = 1,3-bis(4-pyridyl)propane, H 2 L = 4-oxyacetate-benzoic acid, and BIB = 1,4-bis(imidazol-1-yl)-butane), were hydrothermally synthesized by self-assembly of the flexible N-donor ligand and the polycarboxylate ligands. Single crystal X-ray analyses reveal that complexes 1 – 3 possess different structural features. The Cd(II) atom in complex 1 is seven-coordinated by two bidentate chelating carboxylate groups and two nitrogen atoms as well as one water molecule. The adjacent Cd(II) atoms are bridged by two carboxylate groups to form 1D chains running along different directions, which are connected by BPP ligands to generate 2D network. The resulting 2D networks are further linked by hydrogen-bond interactions, affording a 3D supramolecular architecture. In complex 2 , the [Zn 2 (COO) 4 ] units are bridged by L 2− ligands to generate 1D double chain structure and then linked by BIB ligands to give 2D grid framework. In complex 3 , the [Cd(L 2 )] n and [Cd(BIB)] n helixes are alternately arranged, leading to the formation of a 2D bilayer structure.
研究领域:
无机化学
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材料科学
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DOI
高影响因子
Journal of the Iranian Chemical Society
·
2021
·Vol. 19
·期 4
·1489-1497
·
IF 2.019
Chen Mei-Ling,Qiu Yun,Xu Ling,Tan Juan
This paper reports two new Cd(II)-based coordination polymers which are formulated as {[(CH 3 ) 2 NH 2 ][Cd(btc)]} n ·n(DMF) ( 1 ) as well as [Cd 3 (btc) 2 (2-bpmh)(H 2 O) 6 ]} n ·3n(H 2 O) ( 2 ) (H 3 btc = 1,3,5-benzenetricarboxylic acid, 2-bpmh = N , N -bis-pyridin-2-ylmethylene-hydrazine) under the solvothermal reaction conditions, compounds 1 – 2 exhibit intense luminescence emission and excellent photocatalytic property for MB decomposition under the light irradiation of UV. For the children lobar pneumonia treatment, we use ELISA detection kits to determine the TNF-α and IL-1β levels released by the lung epithelial cells. In addition to this, we can also determine the NF-κB’s activation levels by real-time RT-PCR.
研究领域:
材料科学
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医学
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生物学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2021
·
IF 6.165
Jiahao Li,Shiyao Li,Jiaao Chen,Rong Cheng,Fangyuan Chen,Xuli Li,Xuemei Zhang,Tianyu Zeng,Haobo Hou
Many Industrial effluents contain high concentrations of Cd(II) and Pb(II), which are serious problems for causing threat to human health. Adsorption has drawn considerable attention owing to its high efficiency and easy operation. In this paper, nanoscale nitrogen-doped aerogel microspheres (NCA) was synthesised through polymerization of phenolic resin and melamine in an emulsion suspension system. Factors influencing the adsorption properties of NCA and carbon aerogels microspheres (CA) toward Cd(II) and Pb(II) ions were studied, namely, pH, adsorbent content, initial Cd(II) and Pb(II) concentrations, and contact time. Furthermore, three models isotherm including Langmuir, Freundlich, and Sipss and three kinetic models were used in interpreting the adsorption process. NCA exhibited an excellent adsorption property and maximum removal capacity of 935.56 mg·g −1 for Pb(II) and 282.07 mg·g −1 for Cd(II). Results from XPS analysis implied that the amount of Pb absorbed by NCA was higher than that of CA mainly because of the complexing effect of nitrogen-containing functional groups on Pb(II). Furthermore, density functional theory (DFT) calculations confirm that N doping is beneficial to Pb(II) adsorption. These results suggested that NCA can be used as an adsorbent for the removal of Cd(II) and Pb(II) from industrial effluents.
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
RSC Advances
·
2018
·Vol. 8
·期 19
·10561-10572
·
IF 2.936
Lu Fan,Min Deng,Caixue Lin,Chen Xu,Yana Liu,Zhennan Shi,Yingxi Wang,Zushun Xu,Ling Li,Man He
Fe3O4/MOF (metal organic framework)/L-cysteine was synthesized and applied for the removal of Cd(II) from wastewater. The adsorption kinetics and isotherms were investigated, and the results indicated that the adsorption obeyed the pseudo-second-order kinetic model and Langmuir isotherm. The maximum adsorption capacity was calculated to be 248.24 mg g−1. Fe3O4/MOF/L-cysteine was further applied to determine trace amounts of Cd(II) in real water samples using ICP-AES (inductively coupled plasma-atomic emission spectroscopy) based on magnetic solid-phase extraction (MSPE). The determination limit was 10.6 ng mL−1. Additionally, Fe3O4/MOF/L-cysteine can also be used as a fluorescent sensor for “turn-off” detection of Cd(II), and the detection limit was 0.94 ng mL−1.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Ziheng Yang,Xiuhua Chen,Shaoyuan Li,Wenhui Ma,Yi Li,Zudong He,Huanran Hu,Tong Wang
Recycling of kerf-loss slurry waste has become a meaningful and urgent issue in recent years. In this study, a novel hybrid material was prepared by Ag-assisted chemical etching kerf loss silicon waste and subsequently functionalized by a facile three-step graft process of 3-aminopropyltrimethoxy-silane, maleic anhydride, and ethylenediamine, named as EDA-MAH-APTES-NPSi, which could work as an effective adsorbent for removal of Cd(Ⅱ) from aqueous solution. The effect of initial pH, absorption duration, and metal ion concentrations on absorption performance were investigated. The adsorption equilibrium achieved after 120 min, the maximum adsorption capacity reached up to 210.01 mg/g and pH was at 5.5. The adsorption kinetic was fitted in the pseudo-second-order model and the Freundlich equation provided an accurate description for adsorption behavior. The XPS and FT-IR analysis manifested that Cd(Ⅱ) removal might be ascribed to the adsorption on the surface organic functional group by chemical chelating reaction and the ion exchange reaction. The EDA-MAH-APTES-NPSi maintained excellent adsorption capacity which decreased approximately 15.3 % (from 40.5–34.3 mg/g) after five successive regenerated cycles. The work confirms the potential of Cd(Ⅱ) removal from aqueous solution based on the modified NPSi and opens up a new way for recycling silicon cutting waste.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
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