Analytical Methods
·
2023
·Vol. 15
·期 7
·944-950
·
IF 3.1
Wenzhan Yu,Qian Li,Liqiong He,Renlong Zhou,Lifu Liao,Jinhua Xue,Xilin Xiao
Camphor leaves were used as the precursor for the hydrothermal synthesis of carbon quantum dots. The preparation method is simple and rapid, and the raw material is environmentally friendly and easy to obtain. Without additional modification, the carbon quantum dots were used as fluorescent probes for the sensitive and selective detection of Fe3+ and isoniazid at different excitation wavelengths. For Fe3+, at the excitation wavelength of 320 nm, the ratio of fluorescence intensity of CQD solution after adding Fe3+ to CQD solution without Fe3+ addition, F/F0, and Fe3+ concentration showed a good linear relationship in the range of 2.72 × 10−5 to 1.00 × 10−4 mol L−1 (R2 = 0.9912), and the limit of detection was 8.16 μmol L−1. For isoniazid, at the excitation wavelength of 270 nm, the ratio of fluorescence intensity of CQDs solution with isoniazid to CQDs solution without isoniazid, F/F0, and isoniazid concentration showed good linear relationships in the range of 3.81 × 10−6 to 1.00 × 10−5 mol L−1 (R2 = 0.9941) and 1.00 × 10−5 to 2.10 × 10−4 mol L−1 (R2 = 0.9910) respectively, and the limit of detection was 1.14 μmol L−1. A fluorescence method for the determination of Fe and isoniazid content was proposed. The method has been used to detect iron in iron supplement tablets and isoniazid in isoniazid tablets with satisfactory results.
研究领域:
分析化学
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药物分析
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 27
·e54010
·
IF 3
Yan Yang,Xiaoli Zhang,Qinghua Wang,Zequan Xu,Zongming Chen,Jiangtao Tao,Yifeng Wang,Yanjun Chen
Silver nanoparticles (AgNPs) have received great attention in the fields ranging from antibacterial materials to sensors. Herein, a novel and green strategy based on electrodeposition of polysaccharides (chitosan, carboxylated chitosan, carboxymethyl cellulose, and sodium alginate) is explored to synthesize AgNPs with adjustable particle sizes and their polysaccharide-based nanocomposite films. These polysaccharides not only serve as the electrodeposited polysaccharide, but also act as the reducing and stabilizing agents for the synthesis of AgNPs. After the electrodeposition of polysaccharides, homogeneous and smooth deposited films (polysaccharide-based nanocomposite films) have been generated on the anodic electrodes. Spectral analysis and transmission electron microscopy confirm the existence of AgNPs in the nanocomposite films. The as-fabricated AgNPs from the electrodeposition of four polysaccharides have different particle sizes ranging from 2.19 to 12.89 nm. The difference in the particle size of AgNPs is related to the different reducibility and stabilizing ability of the polysaccharides. This work provides a facile and controllable new electrodeposition strategy for green synthesis of AgNPs with different sizes and their nanocomposite films, which presents great potential in fabricating AgNPs and their nanocomposites with specific particle sizes and particular properties.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 21
·2894
·
IF 5.3
Fang Zhou,Weichang Zhou,Yujing Zhao,Li Liu
Bi2Te3has been extensively used because of its excellent thermoelectric properties at room temperature. Here, 230–420 nm of Bi2Te3hexagonal nanosheets has been successfully synthesized via a “green” method by using ethylene glycol solution and applying polyvinyl pyrrolidone (PVP) as a surfactant. In addition, factors influencing morphological evolution are discussed in detail in this study. Among these parameters, the reaction temperature, molar mass of NaOH, different surfactants, and reaction duration are considered as the most essential. The results show that the existence of PVP is vital to the formation of a plate-like morphology. The reaction temperature and alkaline surroundings played essential roles in the formation of Bi2Te3single crystals. By spark plasma sintering, the Bi2Te3hexagonal nanosheets were hot pressed into solid-state samples. We also studied the transport properties of solid-state samples. The electrical conductivityσwas 18.5 × 103Sm−1to 28.69 × 103Sm−1, and the Seebeck coefficientSwas −90.4 to −113.3 µVK−1over a temperature range of 300–550 K. In conclusion, the observation above could serve as a catalyst for future exploration into photocatalysis, solar cells, nonlinear optics, thermoelectric generators, and ultraviolet selective photodetectors of Bi2Te3nanosheet-based photodetectors.
研究领域:
材料科学
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纳米技术
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能源科学
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产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2014
·
IF 0.7
Yue XU,Chun-Jing TANG,Hong HUANG,Chao-Qun SUN,Ya-Kun ZHANG,Qun-Feng YE,Ai-Jun WANG
Fluorescent carbon quantum dots (CQDs) were synthesized by one-step hydrothermal treatment with apple juice as raw material. The result indicated that the fluorescence could be quenched by Hg 2+ with high specificity. Based on this phenomenon, a selective and sensitive sensor was constructed for the detection of Hg 2+ in phosphate solutions (pH 7.0). The fluorescence intensity showed linear responses with Hg 2+ concentration ranging from 5.0 to 100.0 nM and 1.0 to 50.0 μM, with the detection limit of 2.3 nM ( S / N = 3). The as-fabricated sensor was further extended for the determination of Hg 2+ in real water samples.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
CHEMICAL PAPERS
·
2020
·Vol. 74
·期 11
·3839-3846
·
IF 1.68
Cai Zhifeng,Zhu Ruitao,Zhang Caifeng,Hao Erxiao,Zhao Jie,Wu Tianqi
Herein, a simple, green and low-cost method was established to synthesize l -proline-stabilized copper nanoclusters ( l -Pro-Cu NCs) with good water solubility, excellent photostability and resistance to sodium chloride. A series of methods including fluorescence spectroscopy, UV–Vis absorption spectroscopy, Fourier transform infrared spectroscopy, transmission electron microscopy and X-ray photoelectron spectroscopy were used to characterize the structure and optical performance of the Cu NCs. The as-prepared Cu NCs showed green fluorescence with the excitation wavelength of 373 nm. Under the optimal detection conditions, an excellent linear relationship was observed between relative fluorescence intensity ( F 0 / F ) and the concentrations of quercetin ranging from 0.5 to 50 μM, and the detection limit (LOD) was 0.012 μM. Moreover, the proposed method provided an excellent platform for the detection of quercetin in the real samples.
研究领域:
分析化学
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纳米材料科学
·
生物医学
✓ 已验证
DOI
高影响因子
ChemistryOpen
·
2024
·
IF 2.5
Dam Xuan Thang,Nguyen Thuy Chinh,Nguyen Thi Binh Minh,Trinh Hoang Nghia,Thai Hoang
Graphical This study focuses on a green synthesis of Cu 2 O and Cu 2 O−Ag particles using ascorbic acid (LAA) as a reducing agent in the presence of two surfactants, polyethylene glycol 6000 and sodium dodecyl sulfate. The hybrid materials exhibit strongly antibacterial activity and are potential for the application in the acrylic emulsion coating. Nanomaterials based on metal oxides, especially Cu 2 O, have received much attention in recent years due to the many unique properties of the surface plasmon resonance they provide. The report presented the co-precipitation method, a simple preparation method to produce Cu 2 O oxide particles. In addition, to improve the unique antibacterial properties of Cu 2 O, a proposed method is to attach Ag nanoparticles to the surface of Cu 2 O particles. The Cu 2 O and Cu 2 O−Ag particles were synthesized based on redox reactions using ascorbic acid (LAA) as a reducing agent. Moreover, in this experiment, two surfactants, polyethylene glycol 6000 (PEG 6000) and sodium dodecyl sulfate (SDS), were added during the manufacturing process to create particle samples and particle combinations with better properties than the original sample. Changes in the characteristics and properties of particle samples are determined by many different physical and chemical methods such as ultraviolet-visible spectroscopy (UV-Vis), infrared spectroscopy (IR), noise X-ray radiation (XRD), scanning electron microscope (SEM), dynamic light scattering (DLS), energy dispersive X-ray spectroscopy (EDS), and transmission electron microscopy (TEM). Finally, the activity against bacteria, including E. coli and S. aureus , was also tested using the agar well diffusion method to determine the zone of inhibition. The results improved the particle size value, which decreased by half to 200 nm when two additional surfactants, PEG and SDS, were added. In addition, the antibacterial ability has also been shown to increase significantly when the diameter of the bacterial inhibition zone increased significantly, reaching values of 20 mm (Cu 2 O/Ag/SDS) and 32 mm (Cu 2 O/Ag/PEG) for the E. coli bacterial strain. The initial test sample was only about 14 mm in size. The S. aureus bacterial strain also had a similar improvement trend after adding Ag to the Cu 2 O surface with the appearance of two surfactants, SDS and PEG. The inhibition zone diameter values reached the optimal value at 36 mm in the Cu 2 O/Ag/PEG particle combination sample compared to only the initial 26 mm in the Cu 2 O particle sample. Finally, the particle samples are added to the acrylic emulsion paint film to evaluate the changes. Positive results were obtained, such as improvement in adhesion (1.22 MPa), relative hardness (240/425), and sand drop resistance (100 L/mil) in the Cu 2 O/Ag/PEG particle combination sample, which showed the correctness and accuracy of the research.
研究领域:
材料科学
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生物学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 22
·5317
·
IF 4.2
Haitao Ren,Fan Qi,Xiangbo Feng,Jiaxiang Liu,Yuzhen Zhao
The liquid-phase method is the most commonly utilized strategy for synthesizing fluorescent carbon quantum dots (CQDs). However, the liquid-phase synthesis of CQDs faces challenges such as low yield, complex purification, and the use of toxic solvents, which limit large-scale production and practical applications. In this study, fluorescent CQDs with a high product yield of 78% were synthesized using glucose as a carbon source through a green and facile one-step solid-phase approach, without solvents or post-treatment. A systematic study of the structure and fluorescence properties of the synthesized CQDs was conducted using various characterization techniques. The results indicated that the mean size of obtained CQDs was 4.1 nm, and that their surface had abundant oxygen-containing functional groups, resulting in favorable water solubility. The synthesized CQDs exhibited excitation-dependent fluorescence, with optimal excitation and emission wavelengths at 358 and 455 nm, respectively. Additionally, the CQDs solution showed bright blue fluorescence under 365 nm UV light, with a quantum yield of 6.21% and a fluorescence lifetime of 3.02 ns. This study offers valuable insights into the green and efficient synthesis of fluorescent CQDs powder.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Guangqin Shi,Ting He,Haian Li,Zhao Yang,Wu Lei,Mingzhu Xia,Yu Tao
In a water solution and with a low reaction temperature of 85 °C, the green preparation of lanthanum-modulated MOF-808 (Zr) was realized, the obtained La-MOF-808 have smaller grain size, larger specific surface area, higher pore volume and larger average pore diameter. When the molar ratio of La: Zr=1:1, 1L-MOF-808 had the best fluoride ion removal performance, and its maximum adsorption capacity for F - reached 101.4 mg/g, which was higher than that of the unmodulated MOF-808 and some other reported fluorine adsorbents. Meanwhile, the regeneration experiment demonstrated that even after five cycles, 1L-MOF-808 retained 73.8 % of its initial adsorption capacity, highlighting its commendable reusability. In addition, when 1L-MOF-808 was applied to actual fluorine-containing wastewater, with the fluoride ion concentration of 25.3 mg/L and an adsorbent dosage of 0.6 g/L, 1L-MOF-808 exhibited excellent resistance to anionic interference (SO 4 2- , Cl - ), the concentration of fluoride ions in effluent was lower than 10 mg/L, meeting the stipulations of fluoride ion discharge outlined in GB39371–2020. Further adsorption mechanism investigation revealed that 1L-MOF-808's affinity for F - was attributed to electrostatic interaction and ligand exchange. Overall, the as-synthesized 1L-MOF-808 not only presents an environmentally friendly approach to producing MOF materials without organic solvents but also develops a new strategy for the design of high-performance adsorbent for effectively removing fluoride ions from wastewater.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Yanyan Chen,Qiang Wang,Tianyong Zha,Jigang Min,Jingying Gao,Cunhui Zhou,Jingyang Li,Mengdi Zhao,Shenjie Li
High-quality water-soluble Ag-In-S/ZnS core/shell quantum dots have been successfully synthesized via a facile and green method, with mercaptosuccinic acid and sodium citrate as dual ligands in one pot. The fabricated quantum dots exhibit excellent optical characteristics, including photoluminescence quantum yield (PLQY) of up to 50%, and the obvious first excition absorption peak. The emission peak of Ag-In-S/ZnS core/shell quantum dots can be tuned from 507 to 580 nm which covers the most of the visible light . Finally, the as-prepared Ag-In-S core quantum dots can be used directly in ion probe , achieved the direct visual inspection of Pb 2+ .
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-9
·
IF 14.919
Liang Chu,Chen Yun,Wu Min,Wang Kai,Zhang Wenkui,Gan Yongping,Huang Hui,Chen Jian,Xia Yang,Zhang Jun,Zheng Shiyou,Pan Hongge
Environmentally benign synthesis of graphite at low temperatures is a great challenge in the absence of transition metal catalysts. Herein, we report a green and efficient approach of synthesizing graphite from carbon dioxide at ultralow temperatures in the absence of transition metal catalysts. Carbon dioxide is converted into graphite submicroflakes in the seconds timescale via reacting with lithium aluminum hydride as the mixture of carbon dioxide and lithium aluminum hydride is heated to as low as 126 °C. Gas pressure-dependent kinetic barriers for synthesizing graphite is demonstrated to be the major reason for our synthesis of graphite without the graphitization process of amorphous carbon. When serving as lithium storage materials, graphite submicroflakes exhibit excellent rate capability and cycling performance with a reversible capacity of ~320 mAh g –1 after 1500 cycles at 1.0 A g –1 . This study provides an avenue to synthesize graphite from greenhouse gases at low temperatures.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Shuang Xie,Jiacao Yang,Xiaojun Wang,Jie Yang
Biobased polymers hold the promise of addressing climate change and biodiversity loss due to deriving from renewable carbon. Dimethyl furan-2,5-dicarboxylate as a biobased monomer is potential alternative of terephthalic acid and has been widely used to produce biobased polyesters or polyamides . In this study, excellent performance of poly(decamethylene furanamide) (PA10F) was synthesized via bulk polymerization with 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) as catalyst. For PA10F produced at 200 °C as well as 0.05 MPa, weight-average molecular weight, glass transition temperature ( T g ) and initial decomposition temperature ( T d-5% ) were up to 62500 g/mol, 103 °C and 401 °C, respectively. Furthermore, the mechanical properties were also outstanding with the tensile strength of about 52.12 MPa, elongation at break of about 68.78%, and tensile modulus of about 1636 MPa. According to the result of X-ray diffraction analysis, the PA10F was amorphous.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
Organic Chemistry Frontiers
·
2015
·Vol. 2
·期 5
·470-475
·
IF 0
Jinqiang Kuang,Xinjun Tang,Shengming Ma
Zinc diiodide has been identified as an effective reagent for the efficient synthesis of trisubstituted allenes from propargylic amines. Compared to CdI2 this protocol offers a green approach. Due to the easy preparation of propargylic amines through the method developed by this group, this method provides a two-step synthesis of trisubstituted allenes from 1-alkynes, ketones, and pyrrolidine. Finally, an efficient synthesis of such trisubstituted allenes from 1-alkynes, ketones, and pyrrolidine via simple filtration has been developed. Compared with the CdI2-mediated protocol, the current protocol enjoys a much wider scope for ketones and affords functionalized allenes without further cyclization in some substrates.
研究领域:
有机化学
·
合成化学
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）