Small
·
2025
·
IF 12.1
Yangzi Shangguan,Ranhao Wang,Huan Tang,Shimao Deng,Qiushi Hu,Jiaxin Liang,Huiling Zhou,Xihan Chen,Hong Chen
Photocatalytic antibiotic degradation is an energy-efficient and environmentally friendly approach with the potential for large-scale application but is severely constrained by the lack of efficient and stable catalysts to produce reactive oxygen species (ROS). This research introduces a charge-ordered 3D Fe 3 S 4 -PUF composite integrated into a custom-built photocatalytic tandem continuous-flow cylinder reactor (TCCR) for antibiotic degradation. The system consistently achieves 100% tetracycline (TC) degradation efficiency with Fe 3 S 4 -PUF during 130 h of continuous operation, benefiting from the charge-ordered 3D Fe 3 S 4 -PUF framework and the TCCR design. Mechanism investigations reveal that the abundant Lewis basic ≡SH site and light-induced sustainable Fe 2+ /Fe 3+ redox cycling within Fe 3 S 4 facilitates the production of H 2 O 2 and ROS. Density functional theory (DFT) calculations indicate that Fe 2+ acts as an active site for capturing and activating O 2 , leading to either one-electron (O 2 →O 2 •− →H 2 O 2 →•OH) or two-electron transfer (O 2 →H 2 O 2 ) pathways. Meanwhile, photogenerated electron and the oxygen atoms in H 2 O 2 provide electrons to Fe 3+ , facilitating the reduction of Fe 3+ to Fe 2+ , thus elucidating the Fe 2+ /Fe 3+ redox cycling mechanism. Moreover, the 3D PUF structure enhances the mass transfer and pollutant-ROS interactions. The continuous-flow photocatalytic reaction validate the efficient antibiotic degradation of Fe 3 S 4 -PUF composite, suggesting its potential for implementation in large-scale antibiotic wastewater treatment systems.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Xin Mao,Nuanyuan Xu,Xinyu Shi,Hui Wen,Changkun Liu
Nanofiltration (NF) is commonly recognized as one of the effective technologies for the separation of magnesium (Mg 2+ ) and lithium (Li + ) from salt-lake brines. Charge repulsion and size exclusion effects often play an important role, whose functions primarily occur at the top surface and the matrix, respectively, of the skin layer. In this study, a novel nanofiltration (NF) membrane is prepared that integrates both size exclusion and charge repulsion effects into the matrix of the skin layer for enhanced Mg 2+ /Li + separation. With the surface-modified hydrophilic polyethylene (PE) membrane as the supporting layer, the prepared NF membrane successfully incorporated Fe 3+ ions into the matrix of the skin layer during the interfacial polymerization (IP). Fe 3+ ions which chelate with amine groups of PEI (aqueous-phase monomers during IP) ensure abundant positive charges within the matrix of the skin layer, providing good hydrophilicity and sustained electrostatic repulsive force against the transmembrane transport of Mg 2+ , and thus the enhanced rejection. Results exhibited a remarkable 92.6 % rejection rate for MgCl 2 and a higher water permeance of 22 LMH/bar, which is 1.57 times greater than that of the traditional PEI-TMC membranes. The nanofiltration process effectively reduced the Mg 2+ /Li + ratio from 50 in the feed to 5.4 in the permeate solution. It is also interesting to find that although the pore size of the skin layer (0.53 nm in radius) exceeds both the hydrated radii of Mg 2+ and Li + , the positive charges within the matrix of the skin layer still provide good selective separation performance, thus effectively breaking the trade-off of permeability and selectivity. This study offers a fresh perspective on the preparation of nanofiltration membranes by systematically exploring the potential of integration of charge repulsion and size exclusion effects into one location, i.e., the matrix of the skin layer for enhanced Mg 2+ /Li + separation performance.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Abdur Raheem Aleem,Wei Ding,Jin Liu,Taisen Li,Yaowei Guo,Qian Wang,Yao Wang,Yanxin Wang,Faisal U.L. Rehman,Matt J. Kipper,Laurence A. Belfiore,Jianguo Tang
Water-soluble luminescent lanthanide complexes that can be excited with visible light could enable rapid detection of toxic anions and cations in biological systems. Eu 3+ -induced hyaluronic acid-chitosan aggregates (EIHCA) can improve the stability, biocompatibility, efficiency, and light absorption of luminescent Eu 3+ complexes. Visible-range excitation may avoid phototoxicity associated with overexposure to UV light in biological and ecological applications. In this work, we synthesized and characterized series of EIHCA complexes having three N -donor heterocyclic ligands: 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (Dphen), 2,2′: 6′,2″-terpyridine (Tpy) and 1,10-phenanthroline monohydrate (Phen). These complexes possessed bright red fluorescence with a visible range excitation maximum. The photophysical properties of one formulation (we denote as EDL6) include fast quenching response (20 s) of the fluorescence, multi-selectivity, low limit of detection, and high quenching (K sv ) values, enabling selective, rapid and sensitive recognition of Cr 2 O 7 2− and Fe 3+ in aqueous solution. Furthermore, EDL6 exhibits cytocompatibility with mammalian cells that make these complexes promising biocompatible candidate as a safe replacement of organic fluorophores for fluorescence sensing applications. Thus, these new EIHCA complexes were successfully employed for the selective detection of hazardous materials in biological and aqueous environment samples.
研究领域:
生物化学
·
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2024
·Vol. 14
·期 10
·2929-2939
·
IF 4.4
Qian Xu,Zhihong Zheng,Jinjing Luo,Zheng Lai,Jianwen Chen,Jiaxin Shang
Supported MnFeOx catalysts have been prepared using Al2O3 as the substrate and were investigated for NH3-SCR. The 20% MnFe/Al2O3 catalyst removed over 80% of NOx with an N2 selectivity exceeding 90% at temperatures between 80 and 340 °C. The results from the various characterization studies indicated that the increased activity of MnFe/Al2O3 catalysts can be primarily linked to the increased chemisorbed oxygen species and Fe3+ concentrations, greater reducibility, and higher adsorption capacity for NH3. These characteristics are the outcome of the strong interaction, larger specific surface, and abundant acidic sites. Additionally, in situ DRIFTS analysis of the reaction mechanism revealed that the E–R and L–H mechanisms were responsible for the NH3-SCR reaction over the 20% MnFe/Al2O3 catalyst.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Mingzi Li,Rong Chen,Qin Yang,Wenjing Yang,Chuanjian Qin,Hongzhao Song,Liang Zhang,Wei Chen
Industrial development has led to contamination of the environment with heavy metal ions, which accumulate in soil or water and pose a serious threat to human health. Simple and rapid detection methods are effective in controlling or preventing the further increase of pollution. However, existing detection methods are relatively complex or require expensive instruments and special sample handling, often resulting in secondary contamination. Therefore, there is a real need for a simple and economical on-site detection method. Herein, we describe a new method for the detection of Fe3+ ions in industrial wastewater using shape change in a hydrogel. Metal ions coordinate with the carboxyl groups in a polyacrylic acid/poly(vinyl alcohol) shape memory hydrogel, and this fixes temporary shapes that depend on the metal ions and their concentrations. This shape change is reversible by the dissociation of ethylenediaminetetraacetic acid. In particular, this change can be well reproduced and observed with the naked eyes. The shape memory performance experiments and density functional theory (DFT) simulation calculations showed that Fe3+ ions coordinated most strongly with the carboxyl groups in the hydrogel under experimental conditions. A quantitative relationship between the shape fixation ratio and Fe3+ ion concentrations was established. According to this, an economic on-site testing device was designed to achieve analogue effluent detection. The method has potential applications for rapid detection of Fe3+ ion concentration in highly acidic industrial wastewater, which offers the possibility of practical application of shape memory hydrogels in environmental management.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yiting Lv,Jinjuan Xue,Zhaoxia Chen,Jianan Qu,Kaiwen Huang,Mingxin Wang,Wei Sun
Photocatalytic production of H 2 O 2 has garnered significant attention, but the use of sacrificial reagents in H 2 O 2 photosynthesis and the subsequent limited H 2 O 2 activation efficiency would impede its practical application in water decontamination. In this work, hydrothermal carbonaceous carbon/NH 2 -MIL-101(Fe) (abbreviated as HTC-cf/NMIL-101(Fe)) heterojunction was fabricated through a solvothermal strategy, and serving as a self-sufficient photo-Fenton-like catalyst to in-situ generate and activate H 2 O 2 . Hydrothermal carbonaceous carbon derived from cost-effective waste coffee grounds, serving as a green and sustainable photocatalyst, demonstrated high H 2 O 2 production rate of 612 μmol/g/h without the need for sacrificial reagents or aeration assistance. Moreover, the excellent self-sufficient photo-Fenton activity for HTC-cf/NMIL-101(Fe) can be obtained, which ascribed to the synergistic effect of self-generated H 2 O 2 production as well as the in-situ catalytic H 2 O 2 decomposition of • OH by Fe species in NMIL-101(Fe) and photogenerated electrons. The optimized HTC-cf/NMIL-101(Fe) photocatalyst showed simultaneous improvements in both H 2 O 2 production and activation capabilities. Impressively, the effective circulation of Fe 3+ /Fe 2+ in NMIL-101(Fe), aided by photogenerated electrons, results in a 5-fold increase toward H 2 O 2 decomposition rate constant (K d ) compared to HTC-cf alone under light irradiation in open-air conditions. The enhanced charge separation and appropriate band structure of HTC-cf/NMIL-101(Fe) photocatalyst assured the high selectivity of two-electron O 2 -reduction to H 2 O 2 . HTC-cf/NMIL-101(Fe) displayed excellent photocatalytic sterilization efficiency against E. coli and S. aureus under visible light, and its sterilization application in actual water was also demonstrated. Notably, the adaptability of this system to ambient conditions, including open-air atmosphere, non-sacrificial reagents, and low leaching of Fe ions, highlights the promising practical utility of the HTC-cf/NMIL-101(Fe) photocatalyst.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Shenye Chen,Zhengjian Su,Bingyu Xue,Benxi Xu,Yafei Cheng,Kun Wang,Yidi Li,Zhengyi Fu
Rodent enamel is primarily composed of hydroxyapatite (HAP) nanowires and Fe 3+ -rich amorphous intergranular phases (AIP). Inspired by rodent tooth enamel, this study successfully formed a layer of Fe 3+ -rich AIP on the outer layer of HAP nanowires by ion exchange between Fe 3+ and Ca 2+ within the HAP lattice. The thermal stability of Fe-HAP nanowires with Fe 3+ -rich AIP was enhanced. By bi-directional freezing of Fe-HAP nanowires with polyvinyl alcohol (PVA), rodent enamel-like nanocomposites (Fe-HEN) were obtained. Owing to the reinforcing and toughening effect of Fe 3+ -rich AIP, Fe-HEN exhibited a hardness of 1.66 ± 0.23 GPa, a Young's modulus of 48.8 ± 6.7 GPa in the longitudinal direction, as well as a hardness of 1.38 ± 0.16 GPa and a Young's modulus of 40.2 ± 3.0 GPa in the transversal direction. The flexural strength of the sample reached 153.5 ± 5.0 MPa, which is 2.9 times higher than that of samples without AIP, surpassing the performance of natural rodent enamel. The compressive strength reached 205 ± 4.3 MPa, representing a 1.5-fold increase over the sample without AIP and comparable to that of natural enamel. Compared to samples without AIP, Fe-HEN exhibits superior fracture toughness and crack deflection, better corrosion resistance, owing to the reinforcing effect of Fe 3+ -rich AIP at nanowire interfaces. This study demonstrates the incorporation of amorphous reinforced structures into the tooth enamel-like materials via ion exchange, offering a promising strategy for the development of high-performance multiscale composites.
研究领域:
材料科学
·
牙科医学
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
Chemistry-An Asian Journal
·
2025
·
IF 3.3
Yefeng Lin,Yong Qian,Xiaoxiao Zhang,Dazhou Kuang,Yingjie Long,Haonan Zheng,Rongrong Nie,Songnan Qu,Hui Wang
In recent years, carbon dots (CDs) with fluorescence imaging function have been widely used in biomedicine, electronic manufacturing and environmental monitoring. However, monochromatic fluorescence is often limited by the application environment and loses its effectiveness. Here, we carefully designed white fluorescent CDs (WF-CDs) by solvothermal method, which is used for fluorescence imaging applications under different environmental conditions. WF-CDs based on nitrogen doping can produce obvious emission peaks at 640 nm, 490 nm and 400 nm, respectively, corresponding to red, green and blue (RGB) bands in the three primary colors. The full wavelength emission was realized by changing the solvent types and pH values to adjust the emission peak intensity. WF-CDs can accurately detect Fe 3+ concentration according to fluorescence extinction degree (fluorescence elimination rate reaches 95.34 %). Furthermore, WF-CDs has practical applications in cell-level fluorescence imaging, near-infrared fluorescence imaging and ultraviolet anti-counterfeiting, and has broad application prospects in the fields of nano-medicine and industrial manufacturing.
研究领域:
纳米医学
·
生物医学工程
·
环境监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYST
·
2020
·Vol. 146
·期 3
·1032-1039
·
IF 3.978
Jianlin Pu,Chang Liu,Bin Wang,Pei Liu,Yanzi Jin,Jiucun Chen
Carbon dots (CDs) have demonstrated considerable potential for use in sensing and bioimaging applications based on their unique intrinsic properties. However, CDs have typically been used as fluorescence sensors, as opposed to indicators, based on their ultraviolet absorption and discoloration performance. In this study, orange red-emitting CDs with a high quantum yield (QY) of 53% were constructed from 2,3-diaminopyridine via solvothermal synthesis. Different from the fluorescence quenching behavior reported previously, the constructed CDs demonstrated a unique character in their ultraviolet absorption and fluorescence emission in the presence of Fe3+. The color of the CD solution varied from mauve to orange following the addition of Fe3+ at concentrations exceeding 1 μM, which enabled these CDs to be used in the determination of the presence of Fe3+ in lake water. In addition, due to their negligible cytotoxicity, good solubility, and adequate dispersity, an outstanding cellular probe with near-infrared fluorescence was established. Overall, this study presents a unique CD-based sensor, details its fluorescence mechanism, visual colorimetry, and ultraviolet absorption variations, and confirms its applicability in near-infrared cellular imaging and environmental analyses.
研究领域:
分析化学
·
生物医学工程
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Rongli Zhao,Xiang Guo,Jun Zhang,Ruirui Cui
This study employed the high-temperature solid-phase method to successfully synthesize a comprehensive range of Y 3 Al 12 O 5 : x Fe 3+ novel near-infrared (NIR) phosphors based on yttrium aluminum garnet material. The samples were subjected to characterization utilizing X-ray diffraction (XRD), scanning electron microscopy (SEM), absorption spectroscopy , first-principles calculations, excitation and emission spectroscopy , as well as temperature-dependent luminescence intensity analysis. Subsequently, the specimens were encapsulated within light-emitting diodes (LED) to facilitate their application in night vision and biometric sensing. The results revealed that all sintered samples were phase-pure, with particle sizes around 0.6 μm, exhibiting uniform and fully developed morphology. The absorption spectroscopy indicated a decrease in the bandgap with increasing Fe 3+ doping concentration. The first-principles results revealed that the doping of Fe 3+ introduces Fe-d orbitals, and their contribution to the conduction bands is nearly comparable to that of the d orbitals of the Y 3+ . The spectroscopic results indicated that the samples can be excited through charge transfer of O 2− → Fe 3+ , leading to near-infrared emission at 784 nm with a full width at half maximum (FWHM) of 77 nm at 280 nm, and the FWHM is 73 nm under excitation at 411 nm. The thermal stability analysis revealed that as the temperature increased, there was no observed redshift or blueshift in the emission spectra . The encapsulated NIR LED allows clear visibility of blood vessels on the hand and cacti in a dark room environment. All the aforementioned results provide substantial evidence for the significant application potential of Y 3 Al 12 O 5 : x Fe 3+ NIR phosphors in biometric sensing and night vision.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xuhua He,Ying Wang,Peng Yang,Lin Lin,Shizhuo Liu,Zhipeng Shao,Kai Zhang,Yagang Yao
Emerging biocomposites with excellent heat dissipation capabilities and inherent sustainability are urgently needed to address the cooling issues of modern electronics and growing environmental concerns. However, the moisture stability, mechanical performance, thermal conductivity, and even flame retardancy of biomass-based materials are generally insufficient for practical thermal management applications. Herein, we present a high-performance graphene biocomposite consisting of carboxylated cellulose nanofibers and graphene nanosheets through an evaporation-induced self-assembly and subsequent Fe3+ cross-linking strategy. The Fe3+ coordination plays a critical role in stabilizing the material structure, thereby improving the mechanical strength and water stability of the biocomposite films, and its effect is revealed by density functional theory calculations. The hierarchical structure of the biocomposite films also leads to a high in-plane thermal conductivity of 42.5 W m–1 K–1, enabling a superior heat transfer performance. Furthermore, the resultant biocomposite films exhibit outstanding Joule heating performance with a fast thermal response and long-term stability, improved thermal stability, and flame retardancy. Therefore, such a general strategy and the desired overall properties of the biocomposite films offer wide application prospects for functional and safe thermal management.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 18
·6572
·
IF 4.6
Dandan Jiang,Minghao Zheng,Xiaofan Ma,Yingzhen Zhang,Shaohua Jiang,Juanhua Li,Chunmei Zhang,Kunming Liu,Liqing Li
A fluorescent and colorimetric poly (acrylamide)-based copolymer probeP(AAm-co-RBNCH)has been designed via free radical polymerization of a commercial acrylamide monomer with a rhodamine-functionalized monomerRBNCH. Metal ion selectivity ofRBNCHwas investigated by fluorescence and colorimetric spectrophotometry. Upon addition of Fe3+, a visual color change from colorless to red and a large fluorescence enhancement were observed for the ring-opening of the rhodamine spirolactam mechanism. The monomer gives a sensitive method for quantitatively detecting Fe3+in the linear range of 100–200 μM, with a limit of detection as low as 27 nM and exhibiting high selectivity for Fe3+over 12 other metal ions. The hydrogel sensor was characterized by FTIR, and the effects ofRBNCHamount on gel content and swelling properties were explored. According to the recipe of 1.0 mol%RBNCHto the total monomers, the fabricated hydrogel sensor displayed a good swelling property and reversibility performance and has potential for application in the imaging of Fe3+level in industrial wastewater.Keywords:hydrogel sensor;rhodamine;selectivity;naked-eye detection;free radical polymerization
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）