CHEMOSPHERE
·
2020
·
IF 5.778
Yunfeng Xu,Kaili Wang,Qinghao Zhou,Liting Zhang,Guangren Qian
The ability of thiol-modified humic acids (HAs) to release arsenic in tailings soil after being modified with different sulfur-containing reagents were significantly improved. The structure and physicochemical properties of humic acid (HA) before and after thiol-modification were characterized. The 3-MPTS-HA treated with 3-mercaptopropyltrimethoxysilane (3-MPTS) effectively improved the mobility of arsenic, and its reducing ability was increased from 2 mmol g −1 to 3.54 mmol g −1 . The S content of humic acids were also significantly increased after treatment with sulfur-containing reagents, in which the oxygen-containing functional group (e.g., C = O, C–O) on the surface of HA may be the active sites for binding with sulfur-containing reagents. It was found in the XPS spectrum that because the thiol group is easily oxidized, there are many S forms in thiol-modified HA. The –SH content in Na 2 S·9H 2 O-HA, l (+)-Cysteine-HA (Cys-HA), thioglycolic acid (TGA-HA) and 3-MPTS-HA was determined by fluorescence method to be 13.9, 78.45, 90.34, and 192.29 μmol g −1 , respectively. The study demonstrated that surface thiol modification can increase the abundance of thiol in HA and enhance reactivity, which will further promote the application of HA in the treatment of heavy metal contaminated tailing soil.
研究领域:
环境科学
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土壤学
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DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Yiheng Miao,Weijun Peng,Yijun Cao,Luping Chang,Guixia Fan,Futao Yu
In the work, sulfhydryl functionalized montmorillonite nanosheets based hydrogel balls were firstly synthesized for Pb(II) adsorption, and then characterized by scanning electron microscope (SEM), fourier transform infrared spectroscopy (FTIR), surface area analyzer (BET), thermogravimetry (TG), and zeta potential . Effects of initial solution pH, adsorbent dosage, contact time, temperature on Pb(II) adsorption of the resulting hydrogel balls were investigated systematically. The experimental results showed that the increase amount of sulfhydryl functionalized montmorillonite nanosheets (MMTNs-SH) maintained the hydrogel balls a better porous structure and bigger specific surface area, endowing it a bigger adsorption capacity. The adsorption process was fitted well with pseudo-second-order kinetics model and Freundlich model, and more than 97% of Pb(II) could be removed under the optimum conditions. Moreover, hydrogel spheres have a certain cycle performance. In addition, the interactions between Pb(Ⅱ) ions and the oxygen atoms in the hydroxyl groups and the sulfur atoms in the sulfhydryl groups, and the ion exchange in MMTNs-SH dominated the 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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2024
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IF 4.9
Songlin Chen,Junchao Zhu,Chenlei Ma,Beibei Zhu,Huiyun Qiu,Shengqiang Tong
β- Cyclodextrin ( β -CD) exhibits exceptional chiral recognition ability, and covalent organic frameworks (COFs) have been reported as highly promising chiral carriers. Therefore, incorporating cyclodextrin into COFs may result in chiral covalent organic frameworks (CCOFs) suitable for chiral applications. In this work, a solvothermal method was employed to synthesize a classical porous covalent organic framework (COF-V), while β -CD underwent a two-step modification process, resulting in the synthesis of mercapto- β -cyclodextrin ( β -CD-SH). Subsequently, a β -CD-based covalent organic framework (COF-S-CD) was synthesized through a Thiol-Ene “click” reaction. The synthesized COF-S-CD was successfully applied in enantioselective liquid-liquid extraction for five racemic arylcarboxylic acids, including 2-phenylpropionic acid, 2-(4-methylphenyl) propionic acid, 2-(3-chlorophenyl) propionic acid, 2-(4-nitrophenyl) propionic acid and α -cyclohexylmandelic acid. Under optimized conditions, enantioseparation factors for the five racemates reached 1.78, 2.20, 1.84, 1.76 and 1.96, respectively, which indicated a significant enhancement in chiral recognition ability upon the incorporation of cyclodextrin into the COF material. This new application suggested that the synthesis of covalent organic framework materials incorporating β -CD, with the ability to uniformly disperse in the aqueous phase, holds promising potential for highly effective enantioselective liquid-liquid extraction.
研究领域:
材料科学
·
化学
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DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
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2023
·Vol. 108
·期 3
·768-777
·
IF 2.5
Xue Tong,Yin Yunjie
In this study, a reversible thermochromic wool fabric with excellent color fastness was prepared by reacting thiol-modified thermochromic microcapsules with the fabric. Treatment with tris (2-carboxyethyl) phosphine hydrochloride (TCEP) resulted in the appearance of a large number of thiol groups on the surface of the wool fabric, enabling the formation of disulfide bonds with thiol-containing microcapsules. The effective introduction of thiol groups onto the microcapsule surface and their incorporation onto the wool fibers was confirmed by FTIR analysis. DSC measurements revealed that the color transition temperature of the thiol-modified microcapsules was 48.98 °C. The photos of the color-changing process of the microcapsule solution and the variations in color parameters during the heating-cooling cycles demonstrated the excellent color-changing characteristics of the microcapsules. The covalent bonding between the thiol-modified microcapsules and the wool fabric contributed to its high color fastness. When the dosage of 3-mercaptopropyltriethoxysilane was 10% of tetraethyl orthosilicate, the fading fastness of the thermochromic wool fabric reached grade 3, while the staining fastness reached grade 5. The wet rubbing and dry rubbing fastness were at grade 3 and grade 4, respectively. Even after undergoing 30 cycles of heating and cooling experiments, the K/S value of the thermochromic wool fabric remained stable. Graphical Abstract
研究领域:
纺织科学
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材料化学
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DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
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2020
·
IF 2.929
Shaoxia Wang,Meirong Shen,Jianfei Qu,Xuming Zhuang,Shou-Qing Ni,Xuran Wu
In this study, mercapto-modified graphene/multi-walled carbon nanotube aerogels were facilely constructed by using L-cysteine as a cross-linking agent and modifier. The effective adsorption behaviors of Au(III) from environmental samples by the aerogels were investigated. The aerogels were characterized, and many influencing factors, such as pH value, adsorbent dosage, and contact time, were optimized. The kinetic data followed the pseudo-second-order model, and the equilibrium data fitted well to the Freundlich isotherm model. The maximum adsorption capacity for Au(III) reached approximately 47 mg g −1 . Moreover, the Au(III) could be desorbed with 1 M HCl containing 4% thiourea and detected by inductively coupled plasma atomic emission spectroscopy. Finally, the aerogels were used in lake water, seawater, and soil samples for Au(III) adsorption with recovery rates from 87.0% to 102.8%. The results indicate that the developed aerogel is an excellent adsorbent for removing Au(III) from samples and has significant application prospects in environmental research.
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
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Junli Wang,Chen Luo,Wentao Wang,Hui Wang,Jiaxuan Shi,Taihong Yan,Meiwen Cao,Jianwei Li
The effective separation of palladium isotopes from high-level radioactive waste offers significant advantages, not only in ensuring the safe management and disposal of radioactive materials but also in addressing the scarcity of noble metals. In this study, a covalent organic framework (COF-SSH) modified with thiol and thioether groups is synthesized for the purpose of palladium separation. The experimental results demonstrate that the adsorption of Pd(II) occurs rapidly, reaching equilibrium within just 10 min. The adsorption isotherm for Pd(II) aligns well with the Langmuir model, revealing a maximum adsorption capacity of 420.2 mg/g at 3 M HNO 3 . Through Fourier Transform Infrared Spectroscopy (FT-IR), X-ray Photoelectron Spectroscopy (XPS), and Density Functional Theory (DFT) analyses, the interaction between Pd and S atoms as being crucial for the adsorption process is identified. Moreover, COF-SSH exhibits exceptional selectivity for Pd(II) in simulated nuclear wastewater and maintains its performance throughout six consecutive adsorption and regeneration cycles. These results suggest that COF-SSH is a promising adsorbent for palladium separation, offering both acid resistance and high selectivity, making it a valuable candidate to the field of radioactive waste management and noble metal recovery.
研究领域:
材料科学
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核化学
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环境科学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Xueyi Guo,Fangfang Mao,Weijia Wang,Ying Yang,Zhiming Bai
The objectives of this study are to prepare sulfhydryl-modified Fe3O4@SiO2 core/shell magnetic nanocomposites, assess their toxicity in vitro, and explore their potential application in the biomedical fields. Fe3O4 nanoparticles synthesized by facile solvothermal method were coated with SiO2 via the Stöber method and further modified by the meso-2,3-dimercaptosuccinic acid (DMSA) to prepare Fe3O4@SiO2@DMSA nanoparticles. The morphology, structure, functional groups, surface charge, and magnetic susceptibility of the nanoparticles were characterized by transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectrometry, X-ray photoelectron spectroscopy, zeta potential analysis, dynamic laser scattering, and vibrating sample magnetometer. Cytotoxicity tests and hemolysis assay were also carried out. Experimental results show that the toxicity of sulfhydryl-modified Fe3O4@SiO2 core/shell nanoparticles in mouse fibroblast (L-929) cell lines is between grade 0 and grade 1, and the material lacks hemolytic activity, indicating good biocompatibility of this Fe3O4@SiO2@DMSA nanocomposite, which is suitable for further application in biochemical fields.
研究领域:
材料科学
·
生物医学工程
·
毒理学
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产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
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2022
·
IF 6.056
Jingyimei Liang,Qian He,Yuning Zhao,Yahong Yuan,Zhouli Wang,Zhenpeng Gao,Zhongqiu Hu,Xubo Zhao,Tianli Yue
Patulin (PAT) is a common toxin in fruit juice, and adsorption is the most commonly used patulin removal method. The safety, adsorption capacity, and separation capacity of the adsorbent are the most important considerations. As a low-cost and biocompatible microbial material, bacterial cellulose gel membranes (BCMs) have many hydroxyl active sites that are readily modified, and BCMs are also stable, which facilitates their separation from aqueous solution. Therefore, BCMs are a promising material for adsorbing patulin. Through silanization, –SH was successfully connected to BCM, and the maximum content of –SH was 1.25 mmol/g. Because of facile combination of –SH and PAT, our sulfhydryl-modified bacterial cellulose gel membrane [BCM-SH(Si)] retained an adsorption capacity of 498.78 ± 35.94 μg/g in a complex apple juice solution, an adsorption capacity that is 125 × higher than that before the modification. We have thus demonstrated a promising, readily prepared biomaterial for removing of patulin from fruit juice that facilitates subsequent separation of the material from fruit juice and exhibits a good adsorption capacity.
研究领域:
食品科学
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生物技术
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毒理学
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产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2021
·
IF 3.975
Yue Sun,Yingpeng Gu,Xiao Li,Rajendra Prasad Singh
As a common heavy metal ion in wastewater, Hg(II) has high toxicity even at low concentration. In this study, a novel magnetic nano-adsorbent (FS@PTL-SH) was synthesized by modifying thiol groups on phase-transited lysozyme (PTL) coated magnetic nanoparticles . FS@PTL-SH exhibited superior adsorption performance for Hg(II) in a wide pH range. The maximum adsorption capacity of FS@PTL-SH fitted by Langmuir model could reach 1001.21 mg/g at 298 K, and 90% of the equilibrium uptake could be achieved within 5 min. The interference of inorganic ions and organic complexing agents was limited even at high concentrations. High adsorption selectivity of Hg(II) was observed in the mixed solution containing various heavy metal ions. Moreover, FS@PTL-SH could still maintain above 90% of the adsorption capacity after five adsorption–desorption cycles. For the mechanisms, the adsorption of FS@PTL-SH for Hg(II) was mainly relied on the strong complexation of the surface functional groups, especially thiol groups.
研究领域:
环境科学
·
生物化学
·
纳米材料科学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
·
2021
·
IF 3.752
Yujie Chen,Man He,Beibei Chen,Bin Hu
A novel thiol-grafted magnetic polymer (MPPs-SH) was synthesized by “click reaction” between 1,2-ethanedithiol and Fe 3 O 4 @SiO 2 @poly (ethylene glycol dimethacrylate -co- glycidyl methacrylate). The resultant MPPs-SH had high S content (5.4 wt%) and exhibited large specific surface area (156.8 m 2 g −1 ) as well as high adsorption capacity of 254, 64.2, 56.6 mg g −1 for mercury, cadmium and lead ions , respectively. With the prepared MPPs-SH as sorbent , a method of magnetic solid phase extraction combined with inductively coupled plasma mass spectrometry was developed for the quantification of trace mercury, cadmium and lead in environmental water samples. The extraction conditions including sample pH, sample volume, sorbent amount, adsorption/desorption time and elution volume were optimized. Under the optimal conditions, three heavy metal ions were extracted from 150 mL aqueous solution in 10 min and eluted by 0.2 mol L −1 HNO 3 containing 2% thiourea in 5 min. The method presented low limits of detection (0.21, 0.82 and 2.9 ng L −1 ) for target ions. The accuracy of the method was validated by using Certified Reference Materials of Environmental Water including GSB 07–1185–2000 (201435), GSB 07–1183–2000 (201239) and GSB 07–3173–2014 (202046). The application potential was further validated by the determination of trace mercury, cadmium and lead in Yangtze river and East lake water samples. The content of target heavy metal ions in tested water sample was found to be in the range of 6.40–195 ng L −1 , and the recoveries of 86.4–109% were obtained at three spiking concentration levels for mercury, cadmium and lead ions.
研究领域:
环境科学
·
分析化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jiayi Shan,Fei Ying,Linrui Li,Yubo Pan,Ziwen Shi,Jijia Liang,Yunfei Gao,Fengyun Wang,Mingzhu Xia
The development of high-efficiency adsorbents for addressing Pb(II) contamination in aquatic environments remains an urgent challenge in environmental remediation. This study presents a novel thiol-functionalized ZIF-8-based adsorbent (ZIF-8-TMT) with a stable 3D framework and abundant thiol groups, designed to overcome the limitations of conventional adsorption materials. The synthesized ZIF-8-TMT demonstrated a substantial BET surface area (456.58 m 2 /g) and numerous active adsorption sites, exhibiting exceptional Pb(II) adsorption capacity (494.9 mg/g) that surpassed most previously reported adsorbents. Systematic characterization revealed that the composite achieved rapid adsorption kinetics, with approximately 80 % removal efficiency within 30 min, and maintained excellent regenerability - showing negligible capacity reduction after three adsorption-desorption cycles and retaining over 60 % removal efficiency after five cycles. The adsorption mechanism was comprehensively investigated through Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and computational simulations including density functional theory (DFT), bond order density (BOD), and natural adaptive orbital (NAdO) analyses. Results indicated that the superior adsorption performance originated from synergistic effects between electrostatic interactions and dual coordination involving the N3 atoms in 2-methylimidazole ligands and thiol (-SH) groups from TMT. This study not only provides fundamental insights into the coordination chemistry of Pb(II) adsorption but also demonstrates the practical potential of ZIF-8-TMT for wastewater treatment applications, offering a promising solution for heavy metal pollution control with its combination of high capacity, rapid kinetics, and excellent reusability.
研究领域:
环境科学
·
材料化学
·
重金属修复
·
吸附技术
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Qingdong Zhang,Na Liu,Yingze Cao,Weifeng Zhang,Yen Wei,Lin Feng,Lei Jiang
In this work, a novel thiol covered polyamide (nylon 66) microfiltration membrane was fabricated by combining mussel-inspired chemistry and coupling reaction, which owns excellent dual-function that can simultaneously remove oil from water efficiently and adsorb the mercury ions contained in the wastewater reversibly. Such membrane exhibited high oil/water separation efficiency, outstanding mercury adsorption ability, and good stability. Moreover, it can be regenerated in nitric acid solution, and maintain its good adsorption performance. The as-prepared membrane showed great potentials for water purification to reduce the heavy metal ion pollution and complicated industrial oily wastewater and living wastewater.
研究领域:
环境工程
·
材料科学
·
水处理技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）