LUMINESCENCE
·
2020
·Vol. 36
·期 2
·431-442
·
IF 1.855
Qian Liu,Feifei Zhao,Bingfeng Shi,Changli Lü
Carbon dots (CDs) with excellent optical properties are widely used in biomedicine, fluorescence sensing, and light-emitting diodes (LEDs). However, it is still a challenge to prepare CDs that can stably emit red fluorescence in the water environment. In this study, polydopamine-encapsulated luminescent carbon dots (CDs@PDA) with an encapsulating structure were synthesized at room temperature from p -phenylenediamine-derived red-light CDs as the core and using mussel-inspired chemical properties of polydopamine (PDA). In the binary system of water:ethanol = 1: 3 (volume ratio), the as-prepared CDs@PDA had a dual emission of ultraviolet light (330 nm) and red light (640 nm) with the fluorescence quantum yields of 8.0 and 15.5%, respectively, at the same time under 285 nm light excitation. The as-prepared CDs@PDA could be directly used for fluorescence selective sensing of 4-nitrophenol (4-NP) and Fe 3+ through simultaneously quenching of ultraviolet and red fluorescence based on the internal filtration effect mechanism with detection limits of 3.44 and 3.75 μM, respectively. This research showed that PDA-coated CDs can significantly improve the photoluminescence stability of CDs with new optical features. This means that the encapsulated structure of mussel chemistry is very helpful for expanding the application range of CDs in the water environment.
研究领域:
材料科学
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分析化学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Ziyan Li,Kuo Liu,Yuhui Wang,Tianyu Han,Hongliang Han,Lan Zhang,Yaping Li
An aggregation induced emission based compound (( E )-4-((2-hydroxy-5-methoxybenzylidene)amino)benzoic acid) was synthesized through facile Schiff base condensation and characterized by various spectral techniques. The as-prepared compound represented a typical aggregation induced emission behavior in aqueous solution and exploited as a turn-off fluorescent sensor for Fe 3+ detection in THF-H 2 O system (3:7, v/v) with high sensitivity and selectivity. The mechanism of the fluorescence quenching was intensively studied, which was attributed to both dynamic quenching and inner filter effect. The fluorescence probe displayed a highly broad dynamic response range (0.5–500 μM) for selective detection of Fe 3+ with a limit of detection of 0.079 μM. The proposed method was successfully employed for detection and quantification of Fe 3+ in human urine samples and proved to have potential for practical applications in biological field.
研究领域:
分析化学
·
生物医学
✓ 已验证
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Lei Wang,Jingtao Jiang,Chenghao Dai,Huilan Zeng,Yifan Shang,Yongqi Liu,Qiyan Yin,Gengsheng Weng
The design of materials that can mimic the complex shape-morphing phenomena in nature is important for applications in soft robotics, biomedical devices, and sensors. Yet, morphing a two-dimensional thin plate into a programmed complex three-dimensional (3D) shape is still challenging. Herein, we demonstrate a new paradigm for designing a photothermal shape-transformable Fe3+-containing polymer film (FePF) coated with a patterned inactive black-tape strip layer. The near-infrared (NIR) light-triggered dehydrative shrinkage of the FePF layer drives the bending of the inactive layer toward the FePF layer. Various reversible 3D shapes, including a complex “human face” and gripping-force-tunable soft grippers, are fabricated by the experimental pattern design of the inactive layer with the aid of theoretical simulations. The white-light sensitive dynamic coordination of Fe3+–Alanine (Ala) enables tunability of the deformation degree under white-light irradiation. The deformation rate is also tunable by adjusting the Fe-to-Ala mole ratio, humidity, NIR light intensity, and FePF thickness. These shape transformations are reconfigurable through the simple peeling off and repatterning of the black-tape strip layers. Our simple and scalable design strategy without an intricate heterogeneity design in material properties provides guidance for fabricating new soft robotics and biomimetic systems.
研究领域:
材料科学
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软机器人
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生物医学工程
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULES
·
2025
·
IF 5.2
Ronghao Li,Junping Zheng
Despite the solution of the recycling difficulty of traditional thermosetting polymers including polydimethylsiloxane (PDMS) with the development of vitrimers, addressing the trade-off among the mechanical, reprocessing, and thermal properties of PDMS remains a scientific challenge. Herein, a novel “one-stone-for-three-birds” structural design strategy based on the triple effects of Fe3+ including coordination cross-linking for reinforcement and toughening, catalytic effect on silyl ether exchange for reprocessing, and free radical quenching for thermal stabilization is reported, realizing the integration of mechanical robustness, reprocessability, and unprecedentedly high thermal stability in PDMS for the first time. The PDMS vitrimer in this work exhibits the highest thermal stability among the reported PDMS vitrimers, comparable to commercial PDMS. To elucidate the intrinsic mechanisms of the triple effects of Fe3+ in PDMS, multiple characterizations have been performed from the microscopic structure to the macroscopic mechanical, reprocessing, and thermal performances both theoretically and experimentally.
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Jun-jie Li,Xian-feng Wang,Dan-qun Huo,Chang-jun Hou,Huan-bao Fa,Mei Yang,Liang Zhang
Direct detection of Fe 3+ ions is of significant importance in view of both clinical and environmental applications. In the present study, we presented the construction of a paper-based colorimetric sensor by alternative modification of commercial cellulose paper with TiO 2 membrane as intermediate layer, hydrophobic/hydrophilic coating to obtain uniform diffusion, and decoration of –NH 2 and –SH groups for gold nanoparticles (AuNPs) immobilization. After optimization of fabrication and detection conditions, the colorimetric sensor showed a linear concentration-dependent colorimetric response (ΔG) in the presence of Fe 3+ concentrations ranging from 1.0 to 37 μM (R 2 > 0.98). The detection limit was calculated to be 0.85 μM (3δ) with good selectivity. Besides, the sensor also showed high resistance to AuNPs leaking in aqueous solutions, and demonstrated consistent measurement of Fe 3+ in serum samples. Those results suggested that as-prepared sensor strip is potential useful for Fe 3+ ion determination in clinical and environmental samples.
研究领域:
分析化学
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环境科学
·
医学诊断
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2019
·
IF 6.395
Yong Liu,Jia Li,Jiayao Li,Xiaohui Yan,Fudong Wang,Wenning Yang,Dickon H.L. Ng,Jie Yang
The development of new nanomaterials for the highly efficient wastewater treatment has been one of the hot scientific researches. Herein, we report a novel 3D Fe 3+ -doped BiOBr-based magnetic Janus micromotors with superior solar photo-Fenton catalytic activity for organic pollutant degradation. Taking advantage of hydrogen peroxide as reagent and fuel, Fe 3+ -doped BiOBr based Janus micromotors exhibited extremely high efficiency for methylene blue degradation in a solar photo-Fenton system even at mild pH conditions , which was almost 4 times than BiOBr. The speed of the Janus micromotors could reach 214.7 ± 19.4 μm s −1 in a 5% H 2 O 2 solution. Factors influencing the solar photo-Fenton reaction including Fe 3+ -doping amount, pH, concentration of H 2 O 2 , self-propelled movement as well as mechanical stirring were investigated to clarify the degradation mechanism . Nearly 97% of methylene blue was degraded by Fe 0.11 Bi 0.89 OBr/Fe 3 O 4 /Mn 3 O 4 Janus micromotors in the presence of 3% H 2 O 2 solution at neutral environment within 50 min. This study provided a new insight into the preparation of Janus micromotors for water purification applications based on solar photo-Fenton reaction.
研究领域:
环境科学
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纳米材料科学
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催化化学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2015
·Vol. 45
·期 2
·508-514
·
IF 4.197
Fangyuan Gai,Tianlei Zhou,Guang Chu,Ye Li,Yunling Liu,Qisheng Huo,Farid Akhtar
This work demonstrates a novel method for the synthesis of large pore mesoporous silica nanoparticles (MSNs) with a pore diameter of 10.3 nm and a particle diameter of ∼50 nm based on the incorporation of mixed anionic surfactants sodium dodecyl benzene sulfonate (SDBS) and sodium dodecyl sulphate (SDS) as the template in the synthesis process. The dispersity, morphology, pore structure and size of mesoporous nanoparticles were adjusted by changing the molar ratio of two anionic surfactants, the concentration of the co-structure-directing agent (3-aminopropyltrimethoxysilane) and the reaction temperature. The results of synthesis experiments suggested that the formation of large pore MSNs involved a nucleation and growth process. MSNs were post-grafted with a Schiff base moiety for fluorescence sensing of Fe3+ in water. The applicability of functionalized MSNs was demonstrated by selective fluorescence detection of Fe3+ in aqueous media.
研究领域:
纳米技术
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2013
·
IF 5.695
Cheng-Xiong Yang,Hu-Bo Ren,Xiu-Ping Yan
Fluorescent metal–organic frameworks (MOFs) have received great attention in sensing application. Here, we report the exploration of fluorescent MIL-53(Al) for highly selective and sensitive detection of Fe3+ in aqueous solution. The cation exchange between Fe3+ and the framework metal ion Al3+ in MIL-53(Al) led to the quenching of the fluorescence of MIL-53(Al) due to the transformation of strong-fluorescent MIL-53(Al) to weak-fluorescent MIL-53(Fe), allowing highly selective and sensitive detection of Fe3+ in aqueous solution with a linear range of 3–200 μM and a detection limit of 0.9 μM. No interferences from 0.8 M Na+; 0.35 M K+; 11 mM Cu2+; 10 mM Ni2+; 6 mM Ca2+, Pb2+, and Al3+; 5.5 mM Mn2+; 5 mM Co2+ and Cr3+; 4 mM Hg2+, Cd2+, Zn2+, and Mg2+; 3 mM Fe2+; 0.8 M Cl–; 60 mM NO2– and NO3–; 10 mM HPO42–, H2PO4–, SO32–, SO42–, and HCOO–; 8 mM CO32–, HCO3–, and C2O42–; and 5 mM CH3COO– were found for the detection of 150 μM Fe3+. The possible mechanism for the quenching effect of Fe3+ on the fluorescence of MIL-53(Al) was elucidated by inductively coupled plasma-mass spectrometry, X-ray diffraction spectrometry, and Fourier transform infrared spectrometry. The specific cation exchange behavior between Fe3+ and the framework Al3+ along with the excellent stability of MIL-53(Al) allows highly selective and sensitive detection of Fe3+ in aqueous solution. The developed method was applied to the determination of Fe3+ in human urine samples with the quantitative spike recoveries from 98.2% to 106.2%.
研究领域:
材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Chengyu Zhang,Zhaodong Nan
Nanoenzymes have been regarded as strong substitutes to natural enzymes in the last decades. However, high concentrations of substrates are always needed because of the low activity of nanozymes, which causes an increase of the cost and an increase in environmental pollution in practical applications. Thus, improved nanozymic activity is still urgent and vital to reduce the need for high concentrations of substrates. A series of binary metal sulfides (FexNi1–xS2), which exhibited intrinsic nanozymic activity, was first synthesized by a hydrothermal method. Among these samples, the nanosheet-shaped Fe0.8Ni0.2S2 showed the highest activity. Compared with those of FeS2, the catalytic constant (Kcat) and catalytic efficiency (Kcat/Km) of Fe0.8Ni0.2S2 increased about 1.9 and 3.6 times, respectively. The Michaelis–Menten constant (Km) of Fe0.8Ni0.2S2 is about 4.7-fold smaller than that of FeS2, and 193-fold smaller than that of natural enzyme horseradish peroxidase (HRP), indicating a stronger affinity to H2O2. The investigation on the mechanism indicated that Fe2+ and Fe3+ in Fe0.8Ni0.2S2 are the active sites. The synergistic effect between Ni2+ and Fe3+ accelerated the conversion from Fe3+ to Fe2+, which improved the nanozymic activity. In addition, Fe0.8Ni0.2S2 can be used as a nanozyme to detect H2O2 and ascorbic acid (AA) within 1 min at room temperature (25 °C). This work extends the development of binary metal sulfides as artificial enzymes.
研究领域:
生物化学
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材料科学
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催化反应
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2022
·Vol. 14
·期 23
·2318-2328
·
IF 3.532
Qing Fan,Guang-Ming Bao,Si-Han Li,Si-Yi Liu,Xin-Ru Cai,Yi-Fan Xia,Wei Li,Xiao-Ying Wang,Ke Deng,Hou-Qun Yuan
Blue-fluorescent blood-CDs were synthesized through a one-pot hydrothermal method using a mixture of chicken blood and trisodium citrate and then explored as a fluorescent probe for detecting Fe3+ and Hg2+. The probe showed excellent selectivity and sensitivity towards Fe3+ and Hg2+ with a dramatic “on–off” fluorescence response. F− recovered the fluorescence quenching by Fe3+, and Al3+ recovered the fluorescence quenching by Hg2+, showing an “off–on” fluorescence response. The blood-CDs were used as an “on–off–on” dual-channel fluorescent sensor for the detection and discrimination of Fe3+ and Hg2+ ions. The probe showed wide linear ranges for determination of Fe3+ (0–100 μM) and Hg2+ (0–120 μM) with low detection limits of 0.23 μM for Fe3+ and 0.17 μM for Hg2+. This probe was practically applied for the determination of Fe3+ and Hg2+ in piggery feed and wastewater with good recoveries. This work provides a fluorescent probe for the quantification of Fe3+ and Hg2+ in livestock feed and environmental water samples.
研究领域:
分析化学
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环境科学
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生物医学
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Chen Cheng,Dandan Li,Tao Zhao,Dong Wang,Dazhong Zhong,Genyan Hao,Guang Liu,Jinping Li,Qiang Zhao
A NiFe alloy was designed on nickel foam (NF) as a precursor using cathodic electrodeposition . NiFe 2 O 4 –Ni 3 S 2 nanorods (NRs) composite catalysts were prepared by Fe 3+ impregnation and further hydrothermal sulfuration methods. NiFe 2 O 4 –Ni 3 S 2 nanosheets (NSs) were also prepared by direct hydrothermal sulfuration of the NiFe alloy for comparison. Compared to the dense NS structure of the NiFe 2 O 4 –Ni 3 S 2 NSs/NF, the NiFe 2 O 4 –Ni 3 S 2 NRs/NF showed better oxygen evolution performance due to its unique weed-like NR array structure composed of additional oxygen evolution reaction (OER) active sites, with a strong electron interaction for Ni and Fe and the active sulfide synergistic effect with oxides . Therefore, Driving a current density of 10 mA cm −2 only requires an overpotential of 189 mV and the catalyst could provide 100 mA cm −2 continuously and be constant for more than 80 h in 1.0 M KOH. This experiment indicated that Fe 3+ immersion had an indirect regulating effect on the morphological growth of the catalyst, which provided a novel concept for designing better OER catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Zhuoyu Bu,Minhui Hou,Zihao Li,Zhujun Dong,Lusha Zeng,Peng Zhang,Guangyu Wu,Xiang Li,Ying Zhang,Yuwei Pan
Boron was used as an environmentally friendly and efficient reductant to accelerate the recycle of Fe 2+ enhancing peroxymonosulfate (PMS) activation for sulfamethazine (SMT) degradation. The SMT removal was only 28.1% within 30 min in Fe 2+ /PMS system while SMT removal could reach to 98.9% within only 3 min in Boron/Fe 2+ /PMS (B/Fe 2+ /PMS). Electron paramagnetic resonance spectroscopy (EPR) tests, quantitative detection and radical quenching experiments illustrated that OH and SO 4 − played important role and Fe(IV), 1 O 2 and O 2 − also participated in SMT removal. The addition of boron could enhance the role of OH and SO 4 − in SMT removal in Fe 2+ /PMS system. X-ray photoelectron spectroscopy (XPS), electrochemical tests and density functional theory (DFT) calculation were conducted to confirm the mechanism of boron for accelerating the recycle of Fe 2+ . Possible SMT degradation pathway was proposed. B/Fe 2+ /PMS process could efficiently remove SMT at low Fe 2+ dosage and neutral pH. B/Fe 2+ /PMS system also exhibited a superior resistance to inorganic ions and nature organic matters. Moreover, B/Fe 2+ /PMS system had good applicability to different pollutants, excellent reusability for antibiotics removal, and efficient performance for removing antibiotics in nature fresh water. The results compared with others’ works also demonstrated the present study process was a promising strategy for antibiotics removal.
研究领域:
环境科学
·
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）