COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2019
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IF 3.131
Gang Yu,Kuo Han,Jing Wang,Xiao Cheng,Hongmei Ma,Hongya Wu,Zhigang Yang,Guanglei Zhang
In the present work, the activated carbon fibers (ACFs) with homogenous and crystalline CeO 2 -ZrO 2 coatings were obtained using a facile water steam treatment process at a low temperature (300 °C) for efficient removal of Pb(II) from aqueous solutions. The morphology, surface chemical states, and adsorption performance were studied extensively. Results demonstrated that the steam-treated CeO 2 -ZrO 2 /ACFs possessed superior high surface areas (783.23 m 2 g −1 ) and pore volumes (0.41 cm 3 g −1 ). Moreover, numerous C-O-M bonds formed in the interface between CeO 2 -ZrO 2 coatings and ACFs, which can endow the adsorbent desired mechanical property and service durability as well as many surface hydroxyl groups were found and adsorption capacity (61.54 mg g −1 at pH 6.5 ± 0.3 and 25 °C). It was suggested that the steam-treated CeO 2 -ZrO 2 /ACFs could be considered as a promising adsorbent towards wastewater treatment .
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
NEW JOURNAL OF CHEMISTRY
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2015
·Vol. 39
·期 11
·8802-8806
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IF 3.086
Wenshu Yang,Jinhui Hao,Zhe Zhang,Bailin Zhang
Co3O4-modified Prussian blue (PB) nanocubes (PB@Co3O4) were prepared by a simple water-bath method with CoCl2 as the Co source. TEM, SEM, XRD and XPS results indicated the uniform distribution of island-like spinel-phase Co3O4 nanoparticles (NPs) on the surfaces of the PB nanocubes (∼200 nm). The PB@Co3O4 NPs exhibited both intrinsic oxidase- and peroxidase-like activities and were observed to rapidly oxidize the peroxidase substrate 3,3′,5,5′-tetramethylbenzidine (TMB) with or without hydrogen peroxide at acidic pH values. In contrast, PB nanocubes or Co3O4 NPs alone could not efficiently oxidize TMB without H2O2. The enzyme-like activity of PB@Co3O4 NPs was also influenced by the working pH and temperature. Based on the oxidase-like activity of PB@Co3O4 NPs, a facile colorimetric biosensor for detection of glutathione was successfully fabricated, and displayed a linear range of 0.1 to 10 μM (R = 0.9740) and limit of detection of 0.021 μM (S/N = 3). These results demonstrate the potential applications of PB@Co3O4 NPs in bioanalysis and biodetection.
研究领域:
生物分析
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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 the Taiwan Institute of Chemical Engineers
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2021
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IF 5.876
Shihan Wang,Siyao Bian,Jianzhuo Liu,Jihui Li,Shuying Xu,Zhenyi Liang
Background Biochar has attracted considerable attention as a low-cost adsorbent comprised of carbon matrix and mineral for treatment of wastewater. The main purpose of this work was to manufacture CaCO 3 -rich biochars using crayfish shell as feedstock for removal of Cu(II) and Pb(II) from aqueous solution. Methods Pristine and magnetic biochars were prepared via direct pyrolysis and K 2 FeO 4 -promoted pyrolysis , respectively, and characterized by element analysis, BET, FTIR, SEM-EDS, XRD and XPS. Moreover, their adsorption capabilities toward Cu(II) and Pb(II) were investigated in aqueous solution. Findings A large amount of CaCO 3 was assembled on the pristine biochar pyrolyzed at 600 °C, leading to 715.10 mg/g and 1682.87 mg/g adsorption capacities for Cu(II) and Pb(II), respectively. Whereas, CaCO 3 and single phase Fe 3 O 4 were simultaneously introduced into the magnetic biochar with K 2 FeO 4 -promoted pyrolysis at 600 °C using 1/1 (g/g) ratio of K 2 FeO 4 to crayfish shell, where 417.05 mg/g and 974.10 mg/g maximum adsorption capabilities were obtained for Cu(II) and Pb(II) with 29.66 emu/g saturation magnetism, respectively. Cu(II) and Pb(II) were mainly adsorbed onto the biochars as carbonates and oxides by their interaction with CaCO 3 and carbon matrix.
研究领域:
环境科学
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材料科学
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废水处理
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2016
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IF 4.836
Sheng Deng,Peng Wang,Guangshan Zhang,Yuan Dou
A novel thiosemicarbazide modified adsorbent (PAN MW –TSC) based on polyacrylonitrile fiber was successfully synthesized under microwave irradiation, which was applied for the uptake of Cd(II) and Pb(II) from aqueous solution subsequently. Microwave irradiation method is a new approach to achieve the modification and it turns out that just a 30 min process is enough for the anchoring of functional groups in the fiber matrix. The surface characterization was performed by fourier transform infrared spectroscopy (FT–IR), scanning electron microscopy (SEM) elemental analysis (EA) and thermogravimetric analysis (TGA), indicating that the modification was successfully accomplished. Batch adsorption experiments including equilibrium isotherms, kinetics and the effects of pH and temperature on the adsorption of Cd(II) and Pb(II) were systematically studied. Among three kinetic models, the pseudo-second-order kinetic model provides the best correlation for the process. The nonlinear resolution of the Langmuir isotherm equation has been found to show the closest fit to the equilibrium date. Thermodynamic parameters, involving △ G , △ H and △ S were also calculated from graphical interpretation of the experimental data, which suggest that metal ions adsorption onto PAN MW –TSC fibers is spontaneous and exothermic. Regeneration of PAN MW –TSC fibers loaded with metal ions was efficiently done with 0.5 M HNO 3 , by which the investigated adsorbent could be used reproductively for five times with a small decrease in sorption capacity. The feasible preparation of PAN MW –TSC fibers with high adsorption capacities opens a new perspective in the potential application for wastewater treatment .
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
NEW JOURNAL OF CHEMISTRY
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2023
·Vol. 47
·期 29
·13985-13992
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IF 3.3
Luo Xu,Fang Yang,Jiagen Li,Qihui Wang,Lin Du,Min Yang,Xiaohong Fu
In this work, an electrochemical sensor based on a highly efficient competitive method is proposed that uses SiO2-PNPG as an adsorbent for the efficient detection of Pb(II) in soil. The silica (SiO2) and N-phenylglycine (NPG) polymer (SiO2-PNPG), synthesized using a one-pot polymer method, was applied to construct specific metal electrochemical sensors with high sensitivity. The high sensitivity and good selectivity were accomplished in the determination of Pb(II) due to the selective penetration and accumulative effect of SiO2-PNPG. The correlation between the current response and the Pb(II) concentration presents a linear range from 2.12 to 15.78 μg mL−1 with a detection limit of 0.166 μg mL−1 (S/N = 3, R2 = 0.9987). The sensitivity, reproducibility and stability of this sensor are promoted due to the facilitated electron transfer.
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
JOURNAL OF HAZARDOUS MATERIALS
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2013
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IF 3.925
Shao-Ping Kuang,Zhao-Zhan Wang,Jie Liu,Zhan-Chao Wu
In this paper, a novel triethylene-tetramine grafted magnetic chitosan was synthesized. The chemical structure and the percentage content of each element of chitosan and its derivatives were characterized by elemental analysis, infrared spectroscopy, solid state 13 C NMR, X-ray diffraction analysis and thermogravimetric analysis, respectively. Their surface topography was observed by the transmission electron microscope. The results of adsorption kinetics and adsorption thermodynamics showed the adsorption mechanism could be better described by the pseudo-second-order equation ( R > 0.999). The adsorption isotherm was well fitted by the Langmuir equation ( R > 0.999), and 0 < R L < 1. The maximum adsorption capacity was 370.63 mg/g at the optimized adsorption conditions, which were pH = 6, T = 298 K, t = 1.5 h, C 0 = 200 mg/L and adsorbent dose is 500 mg/L. The rate-limiting step may be the chemical adsorption rather than mass transport. The adsorbent still exhibited very good adsorption performance after the fifth regeneration cycle. The mechanism for adsorption and desorption was discussed.
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
SEPARATION SCIENCE AND TECHNOLOGY
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2019
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IF 1.354
Dailian Zhu,Cunqi Qin,Shanshi Ao,Mei Wang,Minghua Wu,Yaohong lü,Kemei Pei,Huagang Ni,Peng Ye
Hypercrosslinked functionalized lignosulfonates (CLS) were prepared by Friedel–Crafts alkylation reaction. The structure of CLS without introducing any functional groups and the according adsorption behaviors of Pb(II) were characterized and studied, respectively. Due to increase of specific surface area and abundance exposure of binding sites, the maximum adsorption capacity of CLS was found to be as high as 74.45 mg/g, which was about seven times that of raw lignin. The results provide a new feasible synthesis method for preparing lignin-based materials with porous structures and promising application for the removal of heavy metal ions from wastewater.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Ying Cao,Xue Hu,Changqian Zhu,Shuangxi Zhou,Rui Li,Huilan Shi,Shiyu Miao,Mohammadtaghi Vakili,Wei Wang,Delin Qi
A key challenge in environmental remediation is the design of adsorbents with appropriate pore size and accessible sorption sites to achieve the rapid uptake and high capacity for the removal of their target pollutants. Covalent organic framework (COF) materials with adjustable pore size and designed skeleton structure are a new class of adsorbent materials for environmental remediation. Here, a novel COF was synthesized by a mild solvothermal solution-suspension method for efficient Pb (II) removal from aqueous solution. The prepared COF material displayed a typical lamellar structure , and the sulfhydryl groups on the COFs skeleton were confirmed to behave as active adsorption sites for Pb (II) capture. Sulfhydryl functionalized COF (COF-SH) reached adsorption equilibriums within 48 h and had a maximum adsorption capacity for Pb (II) of 239 mg/g based on Langmuir fitting. The adsorption capacity of COF-SH for Pb (II) removal is much higher than that of other conventional adsorbents, such as shell activated carbon and resin. Moreover, the selective adsorption performance of COF-SH to Pb (II) in the presence of coexisting heavy metal is superior, and its unique properties are derived from its soft sulfur-based chelating groups allowing selective capture of soft or relatively soft metal ions . The results presented here reveal the exceptional potential of COFs for high performance in environmental remediation.
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
MATERIALS CHEMISTRY AND PHYSICS
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2021
·
IF 4.094
Guangfei Qu,Junhong Zhou,Shuaiyu Liang,Yingli Li,Ping Ning,Keheng Pan,Wei Ji,Huimin Tang
In this study, thiol-functionalized multi-walled carbon nanotubes (MWCNT-SH) was synthesised using carboxy-functionalized multi-walled carbon nanotubes (MWCNT-COOH) as a precursor and 2-mercaptoethanol as a sulfur source. It was an effective adsorbent for Pb(II) removal. The SEM , TEM, FTIR, XPS , EDS , TGA and zeta potential analysis were used to characterize this adsorbent. The adsorption of Pb(II) mainly depends on the abundant functional groups on the surface of MWCNT-SH. Pb(II) adsorption experiments using MWCNT-SH and MWCNT-COOH showed that the adsorption capacity of the former was increased by approximately 30.5% compared to the latter at pH = 5. The increase in adsorption capacity was attributed to the higher adsorption activity of –SH compared to –COOH for Pb(II). The adsorption kinetics data is described well by the pseudo-second-order model, and this implies that the chemical adsorption process mainly determined the adsorption rate. The Pb(II) equilibrium data were highly consistent with the Langmuir adsorption isotherm , and the maximum adsorption capacity for Pb(II) was 144.9 mg g −1 . In addition, the adsorption was a thermonegative and spontaneous reaction. It can be verified by thermodynamic research (ΔG < 0, ΔH > 0, ΔS > 0). Finally, Pb (II) removal apply to three kinds of natural wastewater demonstrated the potential of MWCNT-SH. All the results showed that MWCNT-SH has broad application prospects in water treatment.
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 Energy Storage
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2021
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IF 6.583
Jing Zhong,Jian Gu,Kai-da Zhu,Xin-ru Wang,Sen-lin Wang
Adding lead-carbon composite materials to the negative plate of lead-acid batteries can effectively improve the electrochemical performance of the battery . In this paper, a novel quasi-solid method is used to in-situ synthesize the nano-Pb/C composite as additives in the negative active material of lead-acid cells, which can greatly increase the utilization rate of negative active material and the initial discharge capacity of the lead-acid cell. Compared with the N C material, the nano-Pb/C composite effectively inhibits the hydrogen evolution reaction . In addition, since the nano-Pb/C composite and the negative active material in the negative plate form a porous framework, the diffusion of the electrolyte and the dissolution of PbSO 4 are accelerated. The cell containing 1 wt.% nano-Pb/C composite has the best cycle performance (18,154 cycles) under high-rate partial-state-of-charge condition. All in all, the nano-Pb/C composite prepared via a new quasi-solid method has the advantages of improving the initial capacity and lifespan of lead-acid batteries, and it is a promising candidate material for lead-acid battery additives.
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
高影响因子
MOLECULES
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2023
·Vol. 28
·期 13
·5021
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IF 4.6
Xinlan Han,Jinhua Li,Siyu Tao,Guowei Dou,Sanawar Mansur,Xinqian Zhang
The specific structure and diverse properties of hybrid organic–inorganic perovskite materials make them suitable for use in photovoltaic and sensing fields. In this study, environmentally stable organic–inorganic hybrid perovskite luminescent materials using Pb–MOF as a particular lead source were prepared using a mechanochemical method. Based on the fluorescence intensity of the MAPbBr3/MOF composite, the mechanized chemical preparation conditions of Pb–MOF were optimized using response surface methodology. Then, the morphological characteristics of the MAPbBr3/MOF composite at different stages were analyzed using electron microscopy to explore its transformation and growth process. Furthermore, the composite form of MAPbBr3with Pb–MOF was studied using XRD and XPS, and the approximate content of MAPbBr3in the composite material was calculated. Benefiting from the increase in reaction sites generated from the crush of Pb–MOF during mechanical grinding, more MAPbBr3was generated with a particle size of approximately 5.2 nm, although the morphology of the composite was significantly different from the initial Pb–MOF. Optimal performance of MAPbBr3/MOF was obtained from Pb–MOF prepared under solvent-free conditions, with a milling time of 30 min, milling frequency of 30 Hz and ball–material of 35:1. It was also confirmed that the mechanochemical method had a good universality in preparing organic–inorganic hybrid perovskite/MOF composites.Keywords:Pb–MOF;organic–inorganic hybrid perovskite/MOF composites;mechanochemical method;optical properties
研究领域:
材料科学
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光电子学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 31
·30938-30948
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IF 2.8
Guo Shuangzhen,Dan Zhigang,Duan Ning,Chen Guanyi,Gao Wubin,Zhao Weijie
A novel magnetic silica gel adsorbent (Fe 3 O 4 -Si-COOH) was successfully prepared by introducing carboxyl group in situ to improve the performance for Pb(II), Zn(II), and Cd(II) adsorption. Infrared spectroscopy (IR), scanning electron microscope (SEM), transmission electron microscope (TEM), thermo-gravimetric analyzer (TGA), the Brunauer-Emmett-Teller (BET) surface area, X-ray diffraction (XRD), and vibrating sample magnetometer (VSM) characterizations suggested that Fe 3 O 4 -Si-COOH has been successfully prepared. The adsorption performance was evaluated by batch experiments with different initial concentrations, ionic strength, contact time, and pH. The adsorption kinetics data followed pseudo-second-order model and exhibited a three-stage intraparticle diffusion mode. Isothermal adsorption equilibrium data were best fitted by the Freundlich model and the adsorption capacity were 155, 110, and 93 mg/g (initial concentration 210 mg/L) for Pb(II), Zn(II), and Cd(II), respectively. The result of X-ray photoelectron spectroscopy (XPS) survey spectrum suggested that the main adsorption mechanism is that the H + of carboxyl groups exchanged with heavy metal ions in the adsorption processes. In addition, the adsorbed Fe 3 O 4 -Si-COOH could be regenerated and the adsorption capacity of reused Fe 3 O 4 -Si-COOH could maintain 80.3% after five cycles. Hence, the Fe 3 O 4 -Si-COOH could be a kind of potential material for removing Pb(II), Zn(II), and Cd(II) from wastewater.
Graphical abstract
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
危险品化学品经营许可证（带存储）