CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Mingjun Zhao,Chongyun Shao,Weichang Li,Danping Chen,Wei Chen
A novel strategy for effectively enhancing the near-infrared (NIR) broadband luminescence of Fe 3+ by modifying the symmetry of the Fe 3+ coordination field is developed and evaluated. The borate glass doped with F (fluorine) or S (sulfur) prepared in a reducing atmosphere exhibits broadband NIR luminescence in the 500–1150 nm wavelength range under approximately 360 nm near-ultraviolet (NUV) excitation. The emission peak wavelength is about 740 nm, with a full-width at half maximum (FWHM) of 225 nm and an average lifetime of several hundred microseconds. Combining photoluminescence (PL), absorption (Abs), and electron paramagnetic resonance (EPR) spectroscopy, we proposed that this NIR emission originates from the tetrahedral impurity Fe 3+ coordinated with F − or S 2− in the glass. The presence of F and S alters the symmetry of the local coordination of Fe 3+ centers, resulting in increased splitting of the d-electrons, hence, enhancing the luminescence of the d→d transition. In addition, an NIR gc-LED device is developed by coupling NIR fluorescent glass with a 365 nm commercial near-ultraviolet light-emitting diode (LED). This NIR gc-LED device can be utilized for nondestructive internal detection, nondestructive imaging of blood vessels in the human finger, and night vision. The transparent glass developed in this work is an excellent addition to the group of novel NIR materials and displays significant potential for NIR luminescence applications.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2025
·
IF 5.2
Chunli Li,Zikai Zheng,Shiren Huang,Sujin Zheng,Linyun Zeng,Masrur Khodiev,Utkirjon Holikulov,Mekhrdod S. Kurboniyon,Chunyan Zhou,Jialiang Pan,Xinguo Zhang
Carbon dots (CDs), as emerging fluorescent carbon nanomaterials, boast exceptional optical properties and hold significant potential for various applications. In this study, novel dual-emissive red carbon dots (R-CDs) were synthesized from o -phenylenediamine (oPD) and 2, 2′-dithiobisbenzoic acid (DTSA) in ethanol, exhibiting emission wavelengths at 600 and 650 nm and a high photoluminescence quantum yield (QY) of 30.64 %. Notably, R-CDs exhibit excellent photostability, solvent-dependent fluorescence, and excitation wavelength-independent fluorescence properties. Based on liquid chromatography-mass spectrometry (LC-MS) and the 1 H nuclear magnetic resonance spectra ( 1 H NMR), the luminescent mechanism of R-CDs was systematically investigated to verify that 5,14-dihydroquinoxalinolo[2,3-b] phenazine (DHQP) is the fluorophore of R-CDs and a possible structural formation pathway has been proposed. For application testing, R-CDs demonstrated high sensitivity and selectivity toward Pb 2+ and Fe 3+ , exhibiting good linearity in the concentration ranges of 0–40 μM and 0–60 μM, with the detection limits (LOD) of 0.086 μM and 0.265 μM, respectively. Due to their polarity sensitivity, R-CDs can function as fluorescent sensors for detecting water content in organic solvents. Meanwhile, according to the sensitivity of R-CDs to Fe 3+ , an on-off-on fluorescent sensor was developed to detect F − , L-cys and EDTA with LOD of 9.446, 0.413 and 0.078 μM, respectively. Therefore, this study not only develops novel dual-emissive red carbon dots, but also establishes the foundation for the subsequent advancement of fluorescent sensors.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Longwen Lei,Pengyu Hu,Yihao Zhang,Xing Wang,Yanzhu Guo
Bio-based hydrogels have emerged as a promising and attractive platform in solar-driven interfacial evaporation (SDIE) due to their excellent biocompatibility, super absorption capacity to water, and ability to reduce water evaporation enthalpy. However, the currently reported bio-based hydrogels are generally prepared via a long-time external energy input process, thereby limiting their large-scale application. Herein, the regenerable lignin sulfonate, rich in hydrophilic sulfonate groups and light-absorbing phenolic hydroxyls, is chelated with Fe 3+ to establish a dynamic redox system. This autocatalytic system facilitates the rapid decomposition of potassium persulfate (KPS) to generate abundant free radicals for catalyzing acrylic acid polymerized into hydrogel within 3 min. The incorporation of SLS significantly improves the light absorption properties of hydrogels, along with a decrease in water evaporation enthalpy. Notably, the prepared hydrogel evaporator effectively prevents salt accumulation during the evaporation process, which maintains an evaporation rate of 2.11 kg m −2 h −1 even after 20-cycle evaporation tests. Finally, the prepared hydrogel evaporator could effectively remove pollutants and primary metal ions from wastewater to generate freshwater, and show reliability and stability for long-term desalination. This work would provide an efficient and convenient strategy for the continuous generation of freshwater using a lignin-based solar-driven interfacial evaporator.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yuyan Zheng,Meiling Chen,Xiaoqin Jiang,Xiangting Zhao,Shu Mi,Wenhua Miao,Yadong Zhao,Jin Zhu,Fei Liu
Herein, we propose the homogeneous synthesis of cellulose acetoacetate (CAA) by taking advantage of a CO 2 switchable solvent system. A nucleophilic carbonate cellulose intermediate was in situ formed during the dissolution process, which could initiate the grafting of diketone (DK) directly onto the cellulose backbone through Michael addition. A series of CAA samples with degree of substitution ( DS ) values ranging from 0.18 to 0.74 were prepared by adjusting different reaction conditions such as temperature, time, and the feeding ratio of DK. In addition, metal ion colorimetric test paper was prepared using the good solubility of the CAA sample, which can achieve selective color response to Fe 3+ ions. This study further confirms the feasibility of novel cellulose derivatives by Michael addition in the CO 2 switchable solvent system. And it also indicates that CO 2 switchable solvents have great potential for functionalization of cellulose.
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PubMed
高影响因子
Heliyon
·
2023
·Vol. 10
·期 1
·e23371
·
IF 4
Mingming Zheng,Yinghao Li,Menghua Cao,Yuxin Guo,Guohong Qiu,Shuxin Tu,Shuanglian Xiong,Dun Fang
In the present study, we demonstrated that the presence of cysteine could remarkably enhance the degradation of atrazine by Fe 3 O 4 /persulfate system. The results of electron paramagnetic resonance (EPR) spectra confirmed the combination of cysteine and Fe 3 O 4 exhibited much higher activity on activation of persulfate to generate more SO 4 •- and •OH than Fe 3 O 4 alone. At pH of 3.0, SO 4 •- and •OH contributed to about 58.2 % and 41.8 % of atrazine removal respectively, while •OH gradually dominated the oxidation of atrazine from neutral condition to alkaline condition. The co-existing Cl - and HCO 3 - could quench SO 4 •- , resulting in the inhibition of atrazine degradation. The presence of low natural organic matters (NOM) concentration (0-2 mg L -1 ) could enhance the atrazine removal, and high concentration (>5 mg L -1 ) of NOM restrained the atrazine degradation. During the Cysteine/Fe 3 O 4 /Persulfate process, cysteine served as a complexing reagent and reductant. Through acidolysis and complexation, Fe 3 O 4 could release dissolved and surface bound Fe 2+ , both of which contributed to the activation of persulfate together. Meanwhile, cysteine was not rapidly consumed due to a regeneration process, which was beneficial for maintaining Fe 2+ /Fe 3+ cycle and constantly accelerating the activation of persulfate for atrazine degradation. The reused Fe 3 O 4 and cysteine in the Cysteine/Fe 3 O 4 /Persulfate process exhibited high stability for the atrazine degradation after three cycles. The degradation pathway of atrazine included alkylic-oxidation, dealkylation, dechlorination-hydroxylation processes. The present study indicates the novel Cysteine/Fe 3 O 4 /Persulfate process might be a high potential for treatment of organic polluted water.
研究领域:
环境科学
·
化学工程
·
水处理
·
污染物降解
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PubMed
高影响因子
CRYSTENGCOMM
·
2018
·Vol. 20
·期 38
·5822-5832
·
IF 3.304
Shu-Li Yao,Teng-Fei Zheng,Xue-Mei Tian,Sui-Jun Liu,Chen Cao,Ze-Hao Zhu,Yong-Qiang Chen,Jing-Lin Chen,He-Rui Wen
Six new coordination polymers (CPs) based on the V-shaped 1,3-bis(benzimidazolyl)benzene (bbib) have been synthesized under solvothermal conditions: [Zn(bbib)(ip)]n (1), {[Zn(bbib)(oba)]·solvents}n (2), {[Zn(bbib)(tp)]·DMF}n (3), [Cd(bbib)(ip)]n (4), {[Cd(bbib)(oba)]·H2O·solvents}n (5) and {[Cd(bbib)(tp)]·DMF}n (6) (ip = isophthalate, oba = 4,4′-oxybisbenzoate and tp = terephthalate). Complexes 1–3 display a plane minimal net, (4,4) sheet and a hexagonal plane net, respectively. The structures of 4–6 range from a 1D zigzag chain (4), 2D (4,4) sheet (5) to a 3D “pillar-layer” coordination framework with pcu α-Po topology (6). The structural transition from 1D to 3D among these complexes is realized with the aid of different auxiliary ligands. The results demonstrate that the conformations and coordination modes of dicarboxylate ligands make an impact on the structural diversity of ZnII/CdII coordination polymers. To the best of our knowledge, the CPs based on the bbib ligand have been successfully prepared for the first time. Moreover, complex 2 is a good bifunctional chemosensor for the detection of both Fe3+ and MnO4− with the detection limits of 3.31 ppm and 8.81 ppm, respectively, indicating that 2 could be used as an efficient fluorescent sensor with high sensitivity and selectivity for Fe3+ and MnO4−.
研究领域:
无机化学
·
材料科学
·
分析化学
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DOI
高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Xiamin Lv,Huasheng Man,Lijuan Dong,Jianying Huang,Xiangyang Wang
Carbon dots (CDs) have been a new class of fascinating carbon-based fluorescent nanomaterials. In the present work, new N -doped CDs with highly crystalline graphite structures are prepared from renewable precursors, chitosan and tartaric acid, and are well characterized. The prepared CDs are applied as a biocompatible fluorescent sensor for the sequential detection of Fe 3+ and AA. Among various transition metal ions, Fe 3+ can selectively quench the fluorescence of CDs. Upon the further addition of AA, the quenched fluorescence of CDs is then restored as Fe 3+ is reduced to Fe 2+ by AA, which can be utilized for the fluorescent determination of AA. A good linear relationship in the range of 0–150 μM of AA concentration is established with a low detection limit of 0.02 µM. Moreover, the practical applications of this fluorescent sensing method in measurement of AA in food samples are successfully realized with satisfactory results.
研究领域:
材料科学
·
分析化学
·
生物医学
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DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2018
·
IF 5.106
Qiaoqi Li,Lili Zhang,Pu Su Zhao,Jingzhou Yin,Jun Xia,Zhen-Huan Sheng,Fei Wang,Zhigang Wang,Chengzhu Yin,Jianhua Lin
Gallium borates semiconductors have been developed as effective photocatalysts for water splitting driven by UV light irradiation, but there is no relevant study for the CO2 photoreduction application. Herein, we report the first systematic investigation of open-framework gallium borate—Ga9B18O33(OH)15•H3B3O6•H3BO3 (Ga-PKU-1) applying to photocatalytic CO2 reduction under visible light irradiation by doping Fe3+ ion doping onto the framework. Using hydrothermal method, a series of Fe3+-incorporated Ga-PKU-1 have been successfully obtained, and a high Fe3+-to-Ga3+ substitution content (~10 atom %) can be achieved. The Ga-PKU-1:xFe3+ (x = 0.02 ~ 0.10) photocatalysts are characterized completely by diverse tests (e.g., XRD, XPS, UV-Vis DRS, SEM, N2 sorption). The effective replacement of Ga3+ ion by Fe3+ ion could inhibit the degree of crystallinity of Ga-PKU-1, and also significantly expands the scope of spectral response from UV light to visible light. Compared with bare Ga-PKU-1, Ga-PKU-1:0.10Fe3+ exhibits remarkable CO formation rate of 3.2 μmol/h/g at 30 °C, and the selectivity for CO evolution exceeds 91.4 %. Besides, the CO formation rate increases to 8.3 μmol/h/g after thes loading of Ag as the co-catalyst. After four cycles of photocatalytic CO2 reduction reaction experiments, it still gives constant CO evolution rate and the catalyst is stable. Furthermore, the thermal behavior research indicates Ga-PKU-1:xFe3+ could maintain structural stability at 400 °C.
研究领域:
材料科学
·
环境科学
·
化学
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Xinzong Li,Hongfeng Gao,Yujun Li,Yonggang Wang,Haiyong Zhang
A novel type of humic acid-based nitrogen-doped graphene quantum dots (N-GQDs) exhibiting strong blue fluorescence emission was synthesized using a straightforward hydrothermal method, with coal-derived humic acid and ethanolamine serving as precursors. It was observed that the incorporation of Fe 3+ ions quenches the fluorescence emission of the N-GQDs, the classification of quenching is recognized as static quenching; however, the addition of l -lysine to the N-GQDs/Fe 3+ system effectively restores this fluorescence. Building on these findings, this study further investigates the potential application of N-GQDs as an “on-off-on” fluorescent sensor for detecting both Fe 3+ and l -lysine. It has been established that N-GQDs exhibit commendable selectivity and sensitivity towards Fe 3+ , achieving a detection limit (LoD) of 0.41 μM. Furthermore, the stable N-GQDs/Fe 3+ complex demonstrates significant detection sensitivity to l -lysine in aqueous environments, with a LoD of 1.06 μM. The experimental results indicate that the synthesized N-GQDs possess favorable properties including excellent fluorescence intensity, dispersibility, and water solubility. The developed sensor exhibits considerable potential for improvement and holds promising applications in the domain of water quality monitoring. Additionally, the fluorescence selectivity of N-GQDs towards Fe 3+ was elucidated through calculations involving frontier molecular orbitals.
研究领域:
分析化学
·
环境监测
·
纳米材料
·
生物传感
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水处理
·
分子探针
·
荧光分析
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yining Wang,Mengmeng Shang,Yixin Sun,Minliang Deng,Xiaole Xing,Peipei Dang,Jun Lin
With the increasing role of near-infrared (NIR) light sources in many fields such as food and industry, NIR emitting phosphors have flourished in recent years. In addition to the widely reported Cr 3+ -activated NIR phosphors, environmentally friendly Fe 3+ can also produce tunable broadband NIR spectra, which are expected to enrich the next generation of intelligent NIR light sources. In this work, a series of Fe 3+ -activated perovskite-type Sr 2 ScSbO 6 (SSSO) NIR phosphors were successfully prepared and an emission wavelength of 900 nm with a full width at half maximum (FWHM) of 110 nm was obtained. Through the crystal field engineering strategy, the lattice site of Sr 2+ was completely replaced by Ba 2+ and Ca 2+ to obtain Ba 2 ScSbO 6 (BSSO) and Ca 2 ScSbO 6 (CSSO), and the emission peak was continuously adjusted from 840 nm to 950 nm. When the temperature increased from 300 K to 400 K, BSSO:Fe 3+ , SSSO:Fe 3+ and CSSO:Fe 3+ could maintain 69 %, 82 % and 67 % of the original luminescence intensity, respectively. The opposite crystal field dependence between Fe 3+ and Cr 3+ was shown in double-layer perovskite-type antimonate materials, which could guide us to develop Fe 3+ -activated long-wavelength emission NIR phosphors. Benefiting from the long-wavelength emission of BSSO:Fe 3+ , SSSO:Fe 3+ , and CSSO:Fe 3+ , their application potential in the field of spectral analysis and rapid nighttime recognition were successfully demonstrated.
研究领域:
材料科学
·
光学工程
·
环境科学
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高影响因子
OPTICAL MATERIALS
·
2019
·
IF 2.687
Ying Liang,Yamin Liu,Siyuan Li,Bin Lu,Cailin Liu,Haijun Yang,Xianyan Ren,Yiling Hou
A precise probe that can be applied in a variety of situations, such as both environmental sensor and in vitro imaging, is very attractive and promising. Here, we firstly reported a kind of nitrogen-rich carbon dots (N-CDots) growing during hydrothermal treatment, which emit bright and colorful fluorescence can be utilized as a reliable probe for Ferric ions (Fe 3+ ) detection and bio-imaging. The nitrogen/carbon molar ratio (N/C) in N-CDots is as high as 39.9%. It is the high nitrogen content which provides N-CDots high quantum yield (at excitation wavelength of 365 nm, 400 nm, 440 nm: 34.8%, 27.6%, 22.3%) and thus high sensitivity and bright imaging when detecting Fe 3+ and labeling cells, respectively. Regards to Fe 3+ detection, the N-CDots show really low detection limit (7.6 nM), high selectivity when 16 kinds of other cationic ions are present and high accuracy to determine the concentration of Fe 3+ in tap water. Regards to bio-imaging, the N-CDots showing low toxicity, are successfully loaded into cells and emit colorful florescence in cytoplasm and cytoderm. Furthermore, the N-CDots possess good water dispersibility, excellent photochemical stability and excitation dependent behavior, revealing the big potential for practical applications.
研究领域:
分析化学
·
生物医学
·
材料科学
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Qinhua Wang,Jinxin Lan,Zifeng Hua,Xiaojuan Ma,Lihui Chen,Xiaofeng Pan,Yang Li,Shilin Cao,Yonghao Ni
The development of conductive, soft, ultra-stretchable, and asymmetrically adhesive hydrogels is difficult and essential for both wearable electronics and anti-adhesion tissue dressings. In particular, there is still no simple, effective and universal approach to construct an asymmetrically adhesive multifunctional hydrogel. Here, we first synthesized lignosulfonate sodium (LS)-doped PAA hydrogels with uniform adhesion (adhesive strength : ~30.5 kPa), conductivity (~0.45 S/m), stretchability (up to ~2250%), and low compressive modulus (~20 kPa). In the second step, an oriented soaking of Fe 3+ onto the upper surface of the resultant composite hydrogel renders the upper surface non-adhesive. This novel strategy masterfully delivers asymmetric adhesion behavior to the upper and bottom surfaces of the same hydrogel (~0 kPa adhesive strength for the upper surface; strong adhesive strength of ~27 kPa for the bottom surface). The asymmetric adhesive hydrogel has proven to adhere well onto the human skin and achieve waste-barrier. Importantly, this hydrogel assembled pressure sensor demonstrates excellent anti-interference and wearable comfort.
研究领域:
材料科学
·
生物医学工程
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高影响因子
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