SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Kaili Shi,Honghao Su,Keke Liu,Yatao Zhang,Junyong Zhu
Zr Ⅳ -based metal–organic frameworks (MOFs)–featuring exceptional water stability, large surface area, and structural tunability–hold promise for efficient antibiotics adsorption from water. However, their inherent positive charge in neutral environments and the harsh conditions required for their synthesis hinder their effective removal of cationic antibiotics. To address this challenge, a green one-pot synthesis approach was proposed to fabricate phosphotungstic acid-functionalized MOF-808 (termed as PTA@MOF-808) at room temperature for elevated antibiotic adsorption. This approach not only leverages the strong electronegativity of PTA to improve electrostatic interactions and π-π stacking but also finely tailors the pore size of MOF-808, resulting in enhanced adsorption capacity of PTA@MOF-808. The influence of PTA loading, solution pH, and absorbent dosage on the performance of PTA@MOF-808 were studied in detail. Adsorption experiments demonstrated that PTA@MOF-808 outperformed unmodified MOF-808 in removing various positively charged antibiotics, with 5 % PTA@MOF-808 exhibiting maximum adsorption capacities of 548.1 mg g −1 and 482.9 mg g −1 , for DOX and TCHC, respectively. The adsorption process followed the Langmuir isothermal model and the pseudo-second-order kinetic equation. Furthermore, the composite PTA@MOF-808 displayed excellent reusability after multiple adsorption–desorption cycles. These findings highlight the potential of PTA@MOF-808 as a promising absorbent for removing specific antibiotics from water, with significant implications 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
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
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IF 4.6
Jian Yang,Xiang Liu
The dense surface functional groups of carbon dots (CDs) provided several reactive sites for chemical modifications that might extend applications of CDs. Herein, we tried to modify nitrogen-doped CDs chemically which obtained by pyrolysis of citric acid and β-alanine with n-dodecylamine in aqueous medium for manufacturing cationic CDs surfactant (represented with NCDs-C12). The dilute solution of NCDs-C12 performed outstandingly in declining the surface tension of water from 72.0 to 32.0 mN m −1 , which was comparable to several new types of cationic surfactants. NCDs-C12 solution (in water medium) was apt to foam, which was by far better than that of some typical surfactants at the same concentration. Additionally, NCDs-C12 was positive charged and behaved perfectly in inhibiting the growth of E. coli or S. aureus . None of any organic solvent was used during the whole procedure. We herein provided a novel route of manufacturing a surfactant with renewable substances.
研究领域:
材料科学
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化学工程
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生物学
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产品关联
DOI
高影响因子
BIOCATALYSIS AND BIOTRANSFORMATION
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2025
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IF 1.9
Shenhan Xie,Yanyang Sun,Xu Yan,Yu Han,Chunyu Wang,Fengxi Li,Lei Wang,Zhi Wang
An efficient and environmental method was employed to synthesize multi-substituted 2H-pyran from methyl coumalate and β-keto esters or diketones. Porcine pancreas lipase (PPL) can catalyze this transformation in high yields (74–96%) in aqueous medium (H2O: DMSO = 2:1) under mild conditions (60 °C). The reported strategy exhibits high functional group compatibility and broad substrate scope. In addition, it provides access to a variety of tetra-substituted 2H-pyrans which are considered privileged scaffolds with diverse biological activities.
研究领域:
有机化学
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生物催化
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药物化学
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DOI
高影响因子
Journal of the Iranian Chemical Society
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2023
·Vol. 20
·期 5
·1095-1105
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IF 2.4
Liu Kejun,Luo Rui,Fu Jiaxu,Bao Lijian,Xue Yafei,Gu Qiang,Zhang Yumin,Lin Feng
An efficient synthesis of 1,2,5-trisubstituted benzimidazoles was explored under microwave irradiation. Twenty novel 1,2,5-trisubstituted benzimidazoles were prepared using K 2 CO 3 as an acid-binging agent starting from 2-substituted benzimidazoles and 4-substituted benzyl chloride. This method revealed broad substrate adaptability and provided the target products in moderate to excellent yield within 15 min. The effect of different substituents on the yield was investigated under the obtained optimal reaction conditions. Besides, the crystal structure of compound 4c in the orthorhombic space group P 2ac 2ab was presented. Also, the antibacterial activity of the synthesized compounds against Mycobacterium smegmatis in vitro at the cellular level was evaluated using rifampicin as a positive control. Product 4s had the best antibacterial activity among the synthesized compounds and was superior to rifampicin.
研究领域:
有机化学
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药物化学
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微生物学
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DOI
高影响因子
JOURNAL OF SOILS AND SEDIMENTS
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2021
·Vol. 21
·期 7
·2540-2550
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IF 3.308
Yang Han,Ye Zhi,Feng Fang,Xu Nan,Yang Jing,Yao Zihan,Li Zuling,Chen Jianping
Purpose Lead (Pb(II)) can be accumulated in soil and transferred to humans via the food chain. Therefore, it is essential to improve Pb(II) immobilization during soil remediation. Materials and methods Nanosized zero-valent iron (nZVI) from green tea extract (tea polyphenols, TPs) was successfully synthesized as an additive reductant. Further, the nZVI was supported on montmorillonite (Mont), resulting in a GT-nZVI@Mont composite characterized by multiple techniques, including Zeta potential, SEM, TEM, XRD, and XPS. Moreover, the transport experiments and the toxicity characteristic leaching procedure (TCLP) were conducted to identify the optimum conditions (i.e., GT-nZVI@Mont dosage, Pb(II) concentration, and pH) for the remediation. Results and discussion The experimental results showed that the enhanced transportability of GT-nZVI@Mont was about 40% more than that of GT-nZVI. Meanwhile, Pb(II) immobilization was increased at various pH values (especially under anoxic conditions). The Pb(II) immobilization capacity of GT-nZVI@Mont was 900.8 mg∙g -1 (per unit of Fe content), which was significantly higher than 530.1 mg∙g -1 per unit of Fe content in GT-nZVI. Such enhancement could be ascribed to the synergistic effects of the wrapped TP around the Fe 0 core and the Mont interlayer support, capable of protecting the Fe 0 surface from further oxidation. When GT-nZVI@Mont reacted with the Pb(II) in soil, TPs’ unwrapped coverage increased the reaction sites of Fe 0 cores for Pb(II) reduction and adsorption. Conclusions GT-nZVI@Mont with sufficient transportability provided efficient in situ remediation of Pb(II) in contaminated soil at a wide pH range.
研究领域:
环境科学
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纳米材料
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土壤学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
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2021
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IF 9.297
Yajun Ji,Feiya Xu,Panli Zhang,Yuanyi Xu,Gaili Zhang
It has attracted more and more attention to deal with chromium(VI) (Cr(VI)) pollution in wastewater due to its potential harm to human health. In this study, poly(pyrrole methane) (PPm), a potential material for Cr(VI) adsorption, was greenly synthesized for the removal of Cr(VI) from aqueous solution. Further, the Fe 3 O 4 nanoparticles were loaded on the surface of PPm to enhance the separation property. The adsorption of Cr(VI) was favorable at a lower pH value, and it conformed to Langmuir and pseudo-second-order model. When the solution pH was 2, the dosage of PPm was 0.5 g L −1 , the reaction temperature was 45 °C, and the reaction time was 24 h, the maximum adsorption capacity of PPm reached 922.49 mg g −1 , which was higher than most of the reported adsorbents (40–560 mg g −1 ). The removal rates reached about 100% even in the presence of competitive ions. The as-prepared adsorbent can be reused for 5 times and the removal rate still exceeded 70%. The adsorption mechanisms of Cr(VI) onto PPm included electrostatic interactions, ion exchange, reduction of Cr(VI) to Cr(III), and immobilization of Cr(III). Although the adsorption capacity of PPm/Fe 3 O 4 was lower than that of the pure PPm (549.75 mg g −1 ), it can be facilely separated from aqueous solution after adsorption. Notably, this study also provided a facile strategy to prepare adsorbent with active functional groups for efficient removal of Cr(VI) from aqueous solution.
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
POLYMER
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2019
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IF 3.771
Siyuan Xu,Feng Wu,Zhikai Li,Xiang Zhu,Xiaohong Li,Lian Wang,Yongjin Li,Yingfeng Tu
Typical semicrystalline aromatic polyesters are synthesized via the condensation polymerization of aromatic diacids with excess diols in vacuum. We demonstrate here a green cascade polycondensation-coupling ring-opening polymerization (PROP) method for the facile incorporation of diols into polyesters in N 2 , utilizing cyclic oligo(butylene terephthlate)s as monomer and bio-based 1,10-decanediol as initiator. Poly(butylene- co -decylene terephthalate) (PBDT) copolyesters are synthesized with high atom economy (87–99%), and their structures are characterized and confirmed by the 1 H quantitative NMR, two dimensional 1 H– 1 H gCOSY and DOSY NMR spectra . Property investigations reveal that with the increment of decanediol content, the glass transition temperature , melting temperature, storage modulus and Young's modulus for PBDT copolyesters decrease, while the toughness increases, respectively. Our results provide a high atom economy PROP method for the synthesis of sustainable PBDT copolyesters, which have lower processing temperatures and improved ductility than poly(butylene terephthalate) (PBT) homopolymers , and could draw attentions for further investigations on the green synthesis of other copolyesters.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2014
·Vol. 20
·期 19
·5640-5648
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IF 5.696
Yi-Fan Huang,Xin Zhou,Rong Zhou,Hong Zhang,Kai-Bin Kang,Min Zhao,Yong Peng,Qiang Wang,Hao-Li Zhang,Wen-Yuan Qiu
Graphical Transformers, quantum dots in disguise! The one-pot, green, and sustainable synthesis and functionalization of highly luminescent carbon quantum dots (CQDs), which can be easily transformed into flexible thin films for future roll-to-roll manufacturing (see scheme; TEOS=tetraethoxysilane, PVA=polyvinyl alcohol), is described. Aqueous CQDs were also applied for the in vivo imaging of zebrafish. The multifunctional CQDs provide a rich pool of tools for optoelectronic and biomedical applications. Photoluminescent carbon and/or silicon-based nanodots have attracted ever increasing interest. Accordingly, a myriad of synthetic methodologies have been developed to fabricate them, which unfortunately, however, frequently involve relatively tedious steps, such as initial surface passivation and subsequent functionalization. Herein, we describe a green and sustainable synthetic strategy to combine these procedures into one step and to produce highly luminescent carbon quantum dots (CQDs), which can also be easily fabricated into flexible thin films with intense luminescence for future roll-to-roll manufacturing of optoelectronic devices. The as-synthesized CQDs exhibited enhanced cellular permeability and low or even noncytotoxicity for cellular applications, as corroborated by confocal fluorescence imaging of HeLa cells as well as cell viability measurements. Most strikingly, zebrafish were directly fed with CQDs for in vivo imaging, and mortality and morphologic analysis indicated ingestion of the CQDs posed no harm to the living organisms. Hence, the multifunctional CQDs potentially provide a rich pool of tools for optoelectronic and biomedical applications.
研究领域:
材料科学
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生物医学工程
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光学
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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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2021
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IF 4.539
Hui Hu,Fengxia Wang,Xu Ding,Sarah Imhanria,Wei Wang,Ji Zhang
To address the environmental hazards associated with traditional chemicals in fabricating metal nanoparticles , greener synthetic method using plant-derived material would be a good choice. In this study, platinum nanoparticles (Pt NPs) were greenly fabricated by tea polyphenol (Tp) and applied in hydrogen peroxide (H 2 O 2 ) detection. As-prepared Pt NPs have been characterized by a series of analysis. Physical characterizations show the presence of Pt NPs whose size are about 2.7 ± 0.5 nm and very homogeneous. The electrochemical results show that, as-obtained Pt NPs by Tp (Tp-R-Pt) exhibit good anti-interference, quite a long-term stability and high sensitivity (9.1 μA mM −1 cm −2 ), and it could detect H 2 O 2 without any additional mediator or enzyme. This work would play a positive role in the development of ‘green’ fabrication pattern of nanomaterials using natural resources.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
高影响因子
ENVIRONMENTAL POLLUTION
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2019
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IF 5.714
Wanling Cai,Xiulan Weng,Zuliang Chen
Antibiotics in water and soil are persistent, bioaccumulative and toxic to aquatic organisms and human health. To address it, as one of the new technologies , green synthesized magnetic Fe 3 O 4 nanoparticles by Excoecaria cochinchinensis extract used to remove rifampicin (RIF) was investigated in this study. Results showed the adsorption efficiency of RIF reached 98.4% and the maximum adsorption capacity is 84.8 mg/g when 20 mL of RIF at a concentration of 20 M was adsorbed by 10 mg Fe 3 O 4 at a temperature of 303 K. The morphology of the green Fe 3 O 4 characterized by SEM demonstrated the dimensions ranging from 20 to 30 nm. The N 2 adsorption/desorption isotherms revealed that the surface area of Fe 3 O 4 was 111.8 m 2 /g. In addition, adsorption studies indicated that the kinetics fitted the pseudo second-order and isothermal adsorption conformed to the Langmuir isotherm. Furthermore, due to their magnetic properties, the Fe 3 O 4 nanoparticles were easily separated and reused and the mechanism for removing RIF occurred through adsorption rather than chemical redox reaction. Finally, the reusability of Fe 3 O 4 for adsorption of RIF showed that the removal efficiency decreased to 61.5% after five cycles.
研究领域:
环境科学
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材料科学
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生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED PHYSICS
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2022
·Vol. 131
·期 14
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IF 2.877
Chen Guifeng,Du Qinghua,Zhang Hui,Niu Ruotong,Yuan Wenhao,Xie Xinjian,Guo Tianyu,Liu Guodong
Quantum dots of I–III–VI ternary compounds exhibit unusual photophysical properties and technological utility, which attract attention and have been intensely investigated. CuInSe 2 quantum dots are an environmentally friendly composition, a direct transition, and an adjustable bandgap. Here, we discuss the influence of the Cu/In molar ratio of CuInSe 2 quantum dots on Cu-related defects and photo-physical properties, and CuInSe 2 quantum dots are synthesized by a green, safe, and low-temperature method in triethylene glycol. The proportion of the +1 and +2 oxidation states of Cu in the quantum dots will change with the Cu/In molar atomic ratio. The +1-oxidation state of Cu will prolong the carrier recombination lifetime and provide favorable conditions for the transfer and collection of carriers. By adjusting for different defect types, we can better apply CISe quantum dots in devices and other fields.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 11
·期 3
·2202059
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IF 10.05
Zhicheng Wang,Jiale Guo,Qi-Sheng Lin,Guanghui Rao,Jingtai Zhao,Chengzhang Yang,Weixiang He,Chujie Wang,Zhijun Zhang
Copper-based metal halide scintillators have received increasing attention due to their high light yield and nontoxicity. However, the synthetic methods are still not feasible for actual commercialization for the difficulty in scaling up and the absence of green chemical footprint. Herein, we report a new, simple, aqueous synthetic method for the mass production of highly purified and crystallized Cs 3 Cu 2 Cl 5 powder by a room-temperature reaction between a saturated aqueous solution of CsCl and a saturated hydrochloric acid solution of CuCl. The product exhibits a photoluminence peak centering at 527 nm (FWHM = 106.7 nm) and a quantum yield (PLQY) of 97%. A prototype X-ray imaging detector is fabricated by coupling a large area scintillation screen prepared by blade coating of Cs 3 Cu 2 Cl 5 powder and a commercial thin-film transistor (TFT) panel (16 cm × 13 cm, 125 µm pixel size) with readout circuit. The device exhibits a high spatial resolution of 4 lp mm −1 , exceeding the theoretical limit of the TFT panel, and an excellent dynamic imaging ability. In short, this work demonstrates an efficient novel synthetic method of Cs 3 Cu 2 Cl 5 and its application as X-ray imaging device, providing an applicable solution for its future commercialization.
研究领域:
材料科学
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医学影像
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化学工程
✓ 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）