SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Kang Cheng,Xinyue Liu,Qin Lu,Dongni Wu,Weichao Huang,Chaoyong Deng
Cr 3+ -free near-infrared (NIR) phosphors are currently gaining significant attention in various application fields. A novel Fe 3+ -activated LiAlO 2 NIR phosphor was successfully synthesized by high-temperature solid-state method. Under excitation of 391 nm and 467 nm, the phosphor emits near-infrared light with wavelengths ranging from 600 to 850 nm. The emission bands with peaks at 725 nm correspond to the transition from 4 T 1 ( 4 G) to the ground state energy level 6 A 1 ( 6 S). The optical band gap of LiAlO 2 was calculated using Density Function Theory (DFT) and diffuse reflectance spectrum, respectively. The thermal stability of the sample was measured under 391 nm and 467 nm excitation, showing that the emission intensity at 413 K is 55.3 % and 52.4 % of the emission intensity at room temperature .
研究领域:
材料科学
·
光学
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Renping Cao,Zhiyuan Li,Jingheng Nie,Xiaochun Li,Lei Zhang,Ruirui Yang,Hui Ao,Jingjing Duan,Chenxing Liao
Near-infrared (NIR) luminescent materials based on Fe 3+ are growing interest in recent years because of the low-toxicity, high-efficiency, and adjustable emission. In this work, a broadband NIR emitting β-Mg 3 Ga 2 GeO 8 : Fe 3+ with [Ga/GeO 4 ] tetrahedron for the replacement of Fe 3+ ion is synthesized in air. X-ray diffraction patterns are used to confirm the crystal structure and phase purity. The excitation spectrum is observed in the region from 210 to 550 nm due to the O 2− - Fe 3+ charge transfer and the d – d electron transitions in 3 d 5 orbit of Fe 3+ . A broadband NIR emission of β-Mg 3 Ga 2 GeO 8 : Fe 3+ with full width at half maximum (∼108 nm) in the region from 610 to 880 nm is assigned to the transition 4 T 1 ( 4 G) → 6 A 1 ( 6 S) of Fe 3+ ion. Photoluminescence (PL) spectra under different excitation wavelengths, concentration dependent PL spectra, time-resolved PL spectra, temperature dependent PL spectra, and lifetimes of β-Mg 3 Ga 2 GeO 8 : Fe 3+ are investigated. We confirm the luminous center (Fe 3+ ), the optimal Fe 3+ concentration (0.8 mol%), and the good thermal stability of β-Mg 3 Ga 2 GeO 8 : Fe 3+ . The luminescence mechanism is analyzed theoretically by the Tanabe-Sugano and energy level diagrams of Fe 3+ in β-Mg 3 Ga 2 GeO 8 : Fe 3+ , and the concentration and thermal quenching mechanisms are explained. The research results will be conducive to the development of new Fe 3+ -doped luminescence materials.
研究领域:
材料科学
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光学
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DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 50
·30162-30168
·
IF 3.119
Shixiang Wang,Guangsheng Wang,Yongsheng Fu,Hongbin Wang,Yiqing Liu
Sulfate radical (SO4˙−) based oxidation technologies have been widely used in the remediation of antibiotic-containing wastewater. Activated persulfates are efficient reagents for achieving SO4˙−, but the storage and transportation of concentrated persulfates present associated safety issues. In this study, bisulfite (BS) was used as an alternative precursor for replacing persulfates, and a simple advanced oxidation system (Fe3+/BS) for generating SO4˙− and hydroxyl radical (HO˙) was formulated and evaluated for removing sulfamethoxazole (SMX) from contaminated water. The initial pH, dosages of Fe3+ and BS, as well as the water matrix were investigated to improve the SMX degradation. The results indicated that 1 μmol L−1 SMX was completely removed within 5 min at optimum initial pH of 4.0, Fe3+ dosage of 10 μmol L−1, BS dosage of 100 μmol L−1 and temperature of 25 °C. The presence of HCO3− and natural organic matter (NOM) showed obviously negative effects on SMX degradation, while Cu2+ could slightly promote the degradation of SMX if its concentration was in an appropriate range (∼1 μmol L−1). Scavenger quenching experiments confirmed the presence of SO4˙− and HO˙, which resulted in efficient SMX degradation in the Fe3+/BS system. During the radical chain reactions, Fe2+ and Fe3+ could be converted into each other to form self-circulation in this system. The degradation pathway of SMX by Fe3+/BS was proposed including hydroxylation and bond cleavage.
研究领域:
环境科学
·
水处理技术
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DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2016
·
IF 3.997
Xinjian Cheng,Yun Yu,Yiru Jia,Lian Duan
Three small molecular boron dipyrromethene (BODIPY) derivatives (B3a, B3b and B3c) were well-designed and synthesized at first, and then were incorporated into polyurethane to obtain macromolecular fluorescent sensors. These small molecular BODIPY derivatives exhibited high sensitivity and selectivity to Hg 2 + , Cr 3 + and Fe 3 + ions. The colors of these chemicals changed rapidly upon the addition of Hg 2 + , Cr 3 + and Fe 3 + ions. In addition, their fluorescence peaks shifted and was enhanced as well. B3a, B3b and B3c still remained the sensing properties when being introduced to polyurethane (PU). The functionalized PU films not only showed color change and fluorescence shift for detecting Hg 2 + , Cr 3 + and Fe 3 + ions as their small molecular counterparts, but also triggered a new emission peak in 500–600 nm. Besides, the functionalized PU film (PU-B3a as a sample) could absorb Hg 2 + ions more than 84 mg/g in unit time and volume. It suggested that as long as the structure of the small molecular sensor was remained, the fluorescent ability remained even it is introduced to the macromolecular chains. In addition, Glass transition temperature (T g ) of the PU films changed when B3a, B3b and B3c were introduced.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·
IF 8
Jiangyue Su,Ran Pang,Tao Tan,Shangwei Wang,Xuexia Chen,Su Zhang,Hongjie Zhang
The near-infrared (NIR) persistent luminescence (PersL) materials have attracted widespread attention owing to the unique self-sustained light with good penetrability. Currently, most of the reported NIR PersL materials are activated by Cr 3+ . Considering the potential toxicity of chromium ions, there is an urgent requirement to explore the Cr 3+ -free NIR phosphors. Herein, a novel NIR phosphor Sr 2 LuSbO 6 :Fe 3+ (SLSO:Fe 3+ ) is prepared and its luminescence properties are systematically studied. The Fe 3+ -activated Sr 2 LuSbO 6 exhibits a long-wavelength NIR emission band centered at 890 nm with a 110 nm full-width at half maximum (FWHM), and its PersL can last over 18 h. The phosphor shows excellent PersL stability even after being dispersed in solutions of different environments for 7 days. Furthermore, the PersL emitted by the phosphor can penetrate the 2 cm thickness beef, evidencing its good NIR PersL penetration property. This work provides a novel NIR PersL materials based on Fe 3+ luminescence for technological applications and also contributes to accelerate the development of new-generation Fe 3+ -doped NIR PersL phosphor toward versatile applications.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhenyu Tang,Peichang Ouyang,Yunfang Liu
Plant greenhouse planting has aroused great attention to the development of plant growth light-emitting diode (LED) light source. Far-red emitting phosphors as the main component of plant growth LED lighting have been studied more and more widely. In this study, Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ with far-red emission for plant LED lighting is synthesized in air. X-ray diffractometer (XRD) with the energy dispersive spectroscopy (EDS) is used to test XRD patterns, EDS, and the element mapping diagrams, confirming that Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ has a hexagonal crystal structure of with pure phase Li 1.6 Mg 1.6 Sn 2.8 O 8 . Photoluminescence excitation (PLE) spectrum, time-resolved PL spectra, decay curves, photoluminescence (PL) spectrum, as well as concentration and temperature dependent PL spectra are investigated in detail. Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ under excitation at 305 nm shows far-red emission peaking at ∼702 nm due to the transition 4 T 1 ( 4 G) → 6 A 1 ( 6 S) of Fe 3+ ion in octahedron [FeO 6 ]. PL spectrum of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ matches with the absorption spectra of plants during the process of photosynthesis, indicating a promising application of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ in plant growth LED lighting. Time-resolved PL spectra prove the only luminescence center (Fe 3+ ). Concentration dependent PL spectra confirm the optimal Fe 3+ concentration (0.8 mol%) and the concentration quenching mechanism is analyzed. The temperature dependent PL spectra show good thermal stability of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ and the heat quenching mechanism is explained.
研究领域:
材料科学
·
园艺学
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产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2018
·Vol. 18
·期 6
·4196-4203
·
IF 1.354
Wu Jinzhu,Feng Yaxiu,Shao Yanbin,Sun Yanchun
Nitrogen and silicon co-doped carbon nanodots (N/Si-CDs) were synthesized by one-step hydrothermal carbonization of folic acid and 3-aminopropyl trimethoxy silane with the assistance of glycerol. The resultant N/Si-CDs present intense excitation-independent photoluminescence (PL) emission
owing to their monodisperse sizes and specific surface states. In comparison to nitrogen single doped CDs (N-CDs), the co-doped N/Si-CDs possess better PL properties following different emission manner due to the synergistic effects of the nitrogen and silicon dopants. Besides, the functionalized
surfaces of N/Si-CDs endow them with superior solubility and stability. The as-synthesized N/Si-CDs demonstrate selective and sensitive fluorescence response to Fe3+, which could be explained by the PL quenching effects of Fe3+ on N/Si-CDs. Based on this finding, the
quantitative analysis of aqueous Fe3+ by N/Si-CDs was established, showing good linearity in a range of 10 nM~45 μM and good sensitivity with a detection limit of 3.8 nM, so did for the detection of Fe3+ in fetal bovine serum (FBS) spiked samples. Therefore,
the N/Si-CDs as a novel fluorescence probe hold promising for monitoring environmental and clinical Fe3+.
研究领域:
材料科学
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分析化学
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环境科学
·
医学检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 23
·22998-23008
·
IF 2.8
Zhao Junfeng,Wang Qun,Fu Yongsheng,Peng Bo,Zhou Gaofeng
In this study, the effect of Fe 3+ , Fe 2+ , and Mn 2+ dose, solution pH, reaction temperature, background water matrix (i.e., inorganic anions, cations, and natural organic matters (NOM)), and the kinetics and mechanism for the reaction system of Fe(VI)/Fe 3+ , Fe(VI)/Fe 2+ , and Fe(VI)/Mn 2+ were investigated systematically. Traces of Fe 3+ , Fe 2+ , and Mn 2+ promoted the DCF removal by Fe(VI) significantly. The pseudo-first-order rate constant ( k obs ) of DCF increased with decreasing pH (9–6) and increasing temperature (10–30 °C) due to the gradually reduced stability and enhanced reactivity of Fe(VI). Cu 2+ and Zn 2+ ions evidently improved the DCF removal, while CO 3 2− restrained it. Besides, SO 4 2− , Cl − , NO 3 − , Mg 2+ , and Ca 2+ almost had no influence on the degradation of DCF by Fe(VI)/Fe 3+ , Fe(VI)/Fe 2+ , and Fe(VI)/Mn 2+ within the tested concentration. The addition of 5 or 20 mg L −1 NOM decreased the removal efficiency of DCF. Moreover, Fe 2 O 3 and Fe(OH) 3 , the by-products of Fe(VI), slightly inhibited the DCF removal, while α-FeOOH, another by-product of Fe(VI), showed no influence at pH 7. In addition, MnO 2 and MnO 4 − , the by-products of Mn 2+ , enhanced the DCF degradation due to catalysis and superposition of oxidation capacity, respectively. This study indicates that Fe 3+ and Fe 2+ promoted the DCF removal mainly via the self-catalysis for Fe(VI), and meanwhile, the catalysis of Mn 2+ and the effect of its by-products (i.e., MnO 2 and MnO 4 − ) contributed synchronously for DCF degradation.
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研究领域:
环境科学
·
化学动力学
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产品关联
DOI
PubMed
高影响因子
TALANTA
·
2020
·
IF 5.339
Bo Ruan,Jie Yang,Yi-Jie Zhang,Ning Ma,Dean Shi,Tao Jiang,Fang-Chang Tsai
The fluorescent dye molecules have gained wide attention for their applications in areas such as imaging and sensor. However, the properties of the fluorescent dyes are limited due to the built-in problems such as the aggregation-caused quenching (ACQ). Herein, a fluorescent dye@MOF was developed by encapsulating fluorescent dye molecules into the channels of metal-organic frameworks (MOFs) to disperse them. This composite material SRB@UiO-66, equipping appreciable stability, was successfully obtained with sulfonyl rhodamine B (SRB) integrated into UiO-66. The composite material overtly accelerated the fluorescence property of SRB due to the limitation of nanometer channels on SRB , while UiO-66 has some fluorescence properties. Besides, SRB@UiO-66 with dual emission centers can be utilized as ratiometric sensors for Fe 3+ detection in aqueous solution owing to their high sensitivity and selectivity. SRB@UiO-66 shows a new possibility to fabricate fluorescent molecular probes for the determination of heavy metal ions .
研究领域:
材料科学
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分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 40
·e202403099
·
IF 1.9
Jinning Dang,Yanni Li,Yujia Han,Hongxia Li,Xiaohui Niu,Deyi Zhang,Kunjie Wang
Graphical In this study, novel negatively charged carbon quantum dots(CQDs) were synthesised by a one-step hydrothermal method using tannic acid as raw material. The synthesized CQDs not only inhibit the growth of common bacteria, but also have the potential to be used as fluorescent probes for Fe 3+ with selective fluorescence bursting behaviour towards Fe 3+ . In the field of antimicrobial nanomaterials, biomass-derived carbon quantum dots have attracted great attention from contemporary researchers due to their unique physicochemical properties and favorable biosafety. In this study, novel carbon quantum dots (CQDs) were synthesized from tannic acid by a one-step hydrothermal method. The polymeric CQDs have good surface functionality and hydrophilicity with a large number of hydroxyl, carboxyl and amino functional groups. Antimicrobial experiments showed that CQDs had a good inhibitory effect on Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus, as well as the drug-resistant bacterium methicillin-resistant Staphylococcus aureus. Scanning electron microscopy showed that the morphology of S.aureus cells treated with CQDs became shrivelled and irregular, the surface of E.coli cells protruded to form irregular vesicles, and the whole became shriveled up, whereas MRSA cells appeared to be depressed in the middle, and there was a residue of adherent CQDs on the cell surface. In addition, CQDs exhibit selective fluorescence bursting behavior for ferric ions and can be used as fluorescent probes for rapid, sensitive and selective detection of Fe 3+ . Therefore, CQDs not only possess good bacteriostatic properties, but also serve as fluorescent sensors for the detection of Fe 3+ . It can be used as a potential sensing array for selective detection of iron ions and bacterial abatement from contaminated water.
研究领域:
材料科学
·
微生物学
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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
·
2024
·
IF 4.9
Yiyu Yang,Minjie Peng,Wen Zang,Yu Jiang,Lijing Miao,Chaozhen Wang,Yuenan Zhang,Aiguo Wu,Yujie Zhang
Pyrophosphate (PPi), as a derivative of inorganic phosphate, has important applications in the fields of food and environment, it also plays an important role in biological metabolism and serves as a biomarker for clinical diagnosis of certain diseases. Thus, the development of a simple and convenient method to quantify PPi is of great significance for environmental protection, food safety and disease diagnosis. In this study, visual colorimetric detection of PPi was achieved by inhibiting the morphological change of gold nanorods (Au NRs). In the presence of SCN - , Fe 3+ with low concentration can oxidatively etch Au NRs due to the potential difference, leading to significant color change of Au NRs solutions and blue shift in longitudinal local surface plasmon resonance (LSPR) absorption peak of Au NRs solutions. Due to the strong complexation between PPi and Fe 3+ , the etching of Au NRs by Fe 3+ was restrained, while the morphology of Au NRs, the color and UV–vis absorption spectrum of Au NRs solution remained uninfluenced. Under optimal conditions, this colorimetric detection method exhibited exceptional selectivity, anti-interference, and sensitivity towards PPi, with a linear detection range of 0.8–24 μM. Moreover, practical application results suggest that this colorimetric method holds significant potential for swiftly detecting PPi in intricate samples.
研究领域:
分析化学
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生物医学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Processes
·
2023
·Vol. 11
·期 3
·903
·
IF 3.5
Yajie Wang,Xin Dong,Chengfeng Liu,Peng Cheng,Gilles Mailhot
The decolorization of azo dye Orange II using a UVA-Fe3+-PMS-oxalate system was studied. A series of experiments was performed to investigate the effects of several variables, including the pH, PMS dosage, Fe3+concentration, oxalate concentration, and coexisting anions. The results revealed that a lower pH facilitated the decolorization, and relatively high decolorization efficiency (97.5%) could be achieved within 5 min at pH 3.0. The electron paramagnetic resonance (ESR) and radical quenching experiments revealed that SO4•−played a crucial role in the decolorization of Orange II (85.8%),•OH was of secondary importance (9%), and1O2made a small contribution to the decolorization (5.2%). Furthermore, the formation of•OH in the experimental system strongly depended on HO2•/O2•−. These reactive oxidants were able to directly attack the azo bond of the luminescent group in Orange II and initiate the decolorization process. The efficient UVA-Fe3+-PMS-oxalate system showed great application potential in the treatment of wastewater contaminated by azo dyes.Keywords:PMS activation;Orange II;decolorization;UVA irradiation;Fe3+-oxalate complexes
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）