CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuanyuan Guo,Yixun Gao,Yao Wang,Yi-Kuen Lee,Patrick J. French,Ahmad M. Umar Siddiqui,Hao Li,Guofu Zhou
The significant in situ multicolored patterning without changing printing tools nor substrate media still remains challenging, especially toward practical applications for anti-counterfeiting. This research invented a unique universal approach for the laser-induced in situ synthesis of colorful fluorescent patterns (from blue: CIE 0.15, 0.18 to red orange: CIE 0.36, 0.39) through the controlled formation of N, S doped carbon dots (CDs) in solid composite polymer films or hydrogel with a hierarchical and physically unclonable microsurface architecture for anti-counterfeiting. The in situ patterning approach, coupled with multi-layer technique, yielding designable blue, yellow, orange, and red orange color under 365 nm in the same pattern. A 5 cm 2 colorful pattern can be efficiently finished within 5 min without changing the substrate and the line width accuracy can be up to 300 μm. The absolute quantum efficiency of the blue pattern reached as high as 23%. The fluorescent patterns can be survived at indoor for 24 months. The hydrogen bonding interactions between the CDs precursor and polymer facilitated the generation, uniform dispersion and stabilization of CDs during the laser irradiation. The hypothesis that laser irradiation induced photochemical reactions of CD precursors within a polymer matrix was supported by thermodynamic assessments. The universality of in situ fluorescent patterning strategy was demonstrated by developing fluorescent patterns on both solid polymer films, hydrogel, pharmaceutical packaging and textile.
研究领域:
材料科学
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光学工程
·
化学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Wanrong Zou,Jiurong Li,Xiao Gong
This paper presents a straightforward synthesis strategy for N, S co-doped carbon nanodots (N, S-CDs), aiming to achieve CDs emitting ultra-wide redshifts while obtaining excellent metal ion detection performance. The N, S-CDs display excellent fluorescence (FL) emission independence regardless of the excitation wavelength or concentration. By introducing a single dopant thiourea, the FL emission of CDs was red-shifted from 445 to 575 nm (∼130 nm). The doped N and S elements are discovered to cause the introduction of defective energy levels and an elevation in oxidation on the surface of CDs, which could potentially be the crucial factor for the ultra-wide redshift of FL emission. Also, it is investigated that solvent engineering is essential for the redshift of the emission peak, which can also be an effective way to synthesize multicolor CDs. Furthermore, the N, S-CDs can be utilized for measuring the water content in methanol solvent based on their solvent effects. Additionally, N, S-CDs have the capability of detecting Mn 2+ with high selectivity and sensitivity. The interaction of CDs with Mn 2+ resulted in an obvious change in both the UV absorption spectrum and FL lifetime. To put it differently, the reaction mechanism between CDs and Mn 2+ probably includes mixed processes of dynamic and static quenching. Zeta potential tests additionally indicate that the FL quenching is strongly correlated with the surface condition of CDs. The outcomes and discoveries offer a fresh and viable method for achieving the simultaneous production of long-wavelength glowing CDs and their analysis and detection of metal ions as fluorescent probes.
研究领域:
材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Hongxiang Liu,Shaogui Wu
Mercury ions (Hg²⁺) contamination and chloramphenicol (CAP) residue in food pose significant threats to human health and food safety. This study explores the use of nitrogen and sulfur-doped blue fluorescent carbon dots (B-CDs) as a fluorescence-based sensor for the detection of chloramphenicol (CAP) and mercury ions (Hg²⁺), which are critical contaminants in both environmental and food safety contexts. B-CDs were synthesized and characterized, and their performance as sensors was evaluated through fluorescence intensity measurements in response to varying concentrations of CAP and Hg²⁺. The linear correlation coefficients (R²) for both CAP and Hg²⁺ detection were 0.9958 and 0.9944, respectively, demonstrating a strong linear relationship between fluorescence intensity and analyte concentration. The detection limits for CAP and Hg²⁺ were calculated as 0.31 μM/L and 1.75 μM/L, highlighting the high sensitivity of B-CDs. Additionally, the sensor's performance was tested under various conditions, including changes in temperature, salinity, and light exposure, showing excellent stability and photostability. This work provides a simple, efficient, and highly sensitive sensor for detecting trace amounts of CAP and Hg²⁺, with significant potential for applications in environmental monitoring and food safety. The findings may pave the way for the development of more advanced, cost-effective, and portable fluorescence-based sensors for broader analytical purposes.
研究领域:
分析化学
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食品安全
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2023
·Vol. 41
·期 24
·3677-3683
·
IF 5.4
Jingwen Zhao,Junchen Wang,Linggao Zeng,Sen Zhou,Xiaoming Yang
Comprehensive Summary Long-wavelength fluorescence carbon dots (CDs) show great importance in multiple fields, especially for the biochemical sensing. Here, we proposed one type of CDs doped with nitrogen and sulfur through the hydrothermal method, which exhibited obvious yellow-fluorescence in aqueous solution. Importantly, the fluorescence intensity of CDs decreased with pH decreasing in the acidic range, thus a linear relationship between pH and fluorescence intensity was established, exhibiting the potential of pH sensing. Additionally, introducing tigecycline into CDs resulted in their decreased fluorescence, thus, we further established a strategy of detecting tigecycline with the concentration range of 200 μM to 7 nM. Meanwhile, we elucidated the static quenching as the major mechanism for CDs responding tigecycline, which was induced by the formed new complex between CDs and tigecycline. Furthermore, the practicality of the method was verified by examining the recovery of tigecycline in the actual lake-water samples.
研究领域:
生物化学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Ailing Tian,Kailin Luo,Zhendong Li,Mingming Ma,Shun Li,Xingyi Wang,Deyu Wang,Zhe Peng
Lithium (Li) metal and alloy anodes are strongly attractive for next high-energy-density batteries , owing to their high theoretical specific capacity and low redox potentials . However, the fast electrode pulverization caused by large volume variation upon cycling inhibits the use of the Li metal and alloy anodes seriously, whereas the sluggish charge transfer and weak electrode/electrolyte interphase are mainly responsible for their uneven volume expansion and surface breaks, respectively. Herein, a versatile F–N–S doped lithiophilic interphase is obtained via a one-pot electrochemical fabrication process with high controllability, which exhibits high robustness, Li affinity and fast Li transfer, and significantly outperforms the single lithiophilic interphase obtained via chemical route. When this advanced interphase is applied to the copper or aluminum electrodes, great stabilizations of Li plating/stripping or Li insertion/extraction processes can be achieved. This work emphasizes the importance of the interphase composition for designing stable high-energy-density electrodes, and gives insights on a general and efficient remedy to boost the performances of the large-volume-change electrodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Li Gong,Xiaojiang Qiu,Dong Cheng,Yao Hu,Zaizhi Zhang,Qunsen Yuan,Dezhi Yang,Chengshuai Liu,Liyuan Liang,Feng He
Sulfidated zero-valent iron (S-ZVI) enhances the degradation of chlorinated hydrocarbon (CHC) in contaminated groundwater. Despite numerous studies of S-ZVI, a versatile strategy to improve its dechlorination kinetics, electron efficiency (εe), and dechlorination capacity is still needed. Here, we used heteroatom incorporation of N(C) and S by ball-milling of microscale ZVI with melamine and sulfur via nitridation and sulfidation to synthesize S-N(C)-mZVIbm particles that contain reactive Fe-NX(C) and FeS species. Sulfidation and nitridation synergistically increased the trichloroethene (TCE) dechlorination rate, with reaction constants kSA of 2.98 × 10–2 L·h–1·m–2 by S-N(C)-mZVIbm, compared to 1.77 × 10–3 and 8.15 × 10–5 L·h–1·m–2 by S-mZVIbm and N(C)-mZVIbm, respectively. Data show that sulfidation suppressed the reductive dissociation of N(C) from S-N(C)-mZVIbm, which stabilized the reactive Fe-NX(C) and reserved electrons for TCE dechlorination. In addition to lowering H2 production, S-N(C)-mZVIbm dechlorinated TCE to less reduced products (e.g., acetylene), contributing to the material’s higher εe and dechlorination capacity. This synergistic effect on TCE degradation can be extended to other recalcitrant CHCs (e.g., chloroform) in both deionized and groundwater. This multiheteroatom incorporation approach to optimize ZVI for groundwater remediation provides a basis for further advances in reactive material synthesis.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
FUEL
·
2024
·
IF 6.7
Man Lang,Dengwei Wang,Shenbo Yang,Hao Li
The development of excellent performance catalysts for the hydrodeoxygenation of renewable biomass into value-added chemicals is essential but remains extremely challenging. Herein, a series of novel metal-free carbo-catalyst catalysts through one-step-pyrolysis strategy were fabricated for the hydrodeoxygenation (HDO) of lignin-derived vanillin (VAN) to produce 2-methoxy-4-methylphenol (MMP). It has been demonstrated that 81.32 % VAN conversion could be acquired with a high selectivity of 77.30 % of MMP under the condition of 240 °C, 1 MPa H 2 and 4 h with the assistance of the optimized NSCC-800-7 catalyst. After characterization of the catalyst and density functional theory (DFT) calculations, the outstanding catalytic activity is attributed to the synergistic effect between nitrogen and sulfur dopants, which effectively regulates the number of active sites. N-S vacancy (NSVs) in the N-doped carbon catalysts is found to play an active site for the VAN HDO reaction, which is greatly beneficial to activating hydrogen molecules. Meanwhile, sulfur doping can promote the formation of defect sites and high specific surface area, while enabling to stabilization of NSVs. Additionally, isopropanol was both the reaction medium and the secondary hydrogen donor, which contributed to reducing the external hydrogen supplication. This finding can open broad opportunities for the rational design of novel metal-free catalysts for challenging chemical reactions.
研究领域:
催化化学
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能源材料科学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2017
·
IF 4.162
Chang Xia,Xin Hai,Xu-Wei Chen,Jian-Hua Wang
A facile one-step solvent-free synthesis approach is proposed for the simultaneous fabrication of free and solidified N, S-doped graphene quantum dots (N, S-GQDs) by using citric acid as precursor and L -cysteine as dopant. Graphene nucleus is firstly formed via the intermolecular dehydration of citric acid. N and S are then incorporated into the graphene structure by attacking the margin of graphene nucleus. The cross-linking among the graphene nucleus via the intermolecular condensation leads to the generation of free N, S-GQDs, while the intermolecular amidation between L -cysteine molecules and graphene nucleuses contributes to the solid-state fluorescence graphene quantum dots (SSF-GQDs). The free N, S-GQDs exhibit favorable photoluminescence behaviors such as high fluorescent quantum yield of 74.5%, stable photoluminescence within a wide range of pH and high tolerance to external ionic strength of up to 1.0 mol L −1 NaCl , making it excellent fluorescence probe for the sensitive detection of Fe 3+ with a linear range of 0.01–3 μM and a detection limit of 3.3 nM. The solidification of GQDs prevents the aggregation of GQDs efficiently and offers the solidified N, S-GQDs yellow-green fluorescence, with a fluorescence quantum yield of 10.6%. This proposed protocol provides a novel avenue to fabricate diverse fluorescent graphene materials for different practical applications.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2024
·
IF 4
Liyuan Zhang,Ruiting Zhang,Jinchen Wang,Jiayu Chen,Runzhong Yu
To establish a ratiometric fluorescence sensing system for the detection of glyphosate , nitrogen-sulfur doped carbon quantum dots nano-fluorescent probe was prepared by one-step hydrothermal method . At an excitation wavelength of 360 nm, the emission peak with maximum fluorescence intensity was obtained at 470 nm. The generation of 2.3-diaminophenazine by o-phenylenediamine oxidation produces a new fluorescence emission peak at 570 nm and a decrease in fluorescence at 470 nm. The fluorescence peaks at 470 and 570 nm form a ratio state. In the presence of glyphosate , reduces the oxidation of 2.3-diaminophenazine, this results in enhanced fluorescence at 470 nm and weakened fluorescence at 570 nm. Under the best conditions, the ratiometric fluorescence sensing system has good selectivity , the linear at glyphosate concentrations of 0.005–10 µg/mL, the limit of detection was 2.88 µg/kg, the limit of quantitation was 4.07 µg/kg. In addition, it is worth mentioning that this developed sensing system has shown good detection performance in 10 miscellaneous samples, the simple, efficient, and highly sensitive ratiometric fluorescence detection sensing strategy is provided.
研究领域:
分析化学
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环境科学
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食品科学
✓ 已验证
产品关联
DOI
高影响因子
EcoMat
·
2023
·Vol. 6
·期 2
·e12434
·
IF 14.6
Syed Comail Abbas,Zifeng Hua,Qidu Deng,Md Sohel Ahommed,Jiajia Guo,Hai Huang,Xiaojuan Ma,Shilin Cao,Yonghao Ni
Natural polymers-based carbon electrodes have gained significant research attention for next-generation portable supercapacitors. Herein, present an environmentally benign and novel approach for the synthesis of N/S-O x carbon material derived from natural polymers on gram scale. By capitalizing the synergistic effect of sulfonated lignin and amino-containing chitosan, this methodology produces a straightforward, low-budget, and scalable process. The incorporation of sulfonate motifs from lignin contributes to the formation of C-SO x moieties and multi-porous architecture with a high surface area. Simultaneously, amino groups in chitosan induce nitrogen doping, enhancing conductivity, and wettability. The resulting N/SO x carbon material exhibits a micro/meso-porous architecture, facilitating electrolyte diffusion, and demonstrating improved rate capability and pseudocapacitance via Faradaic redox reactions. The N/SO x carbon material showcases notable capacitance (392 F g −1 at 1 Ag −1 ) as compared with the reported carbon materials form biomass and outstanding cyclic stability (94.8% retention after 5000 cycles). By optimizing various chitosan mass ratios, the most effective N/SO x carbon material SNACM = S/N-doped activated carbon material (SNACM-2) was produced using a lignin: chitosan sample ratio of 1:2 for symmetric supercapacitors. Furthermore, the quasi-solid-state symmetric supercapacitors based on SNACM-2 exhibit an excellent specific capacitance of 142 F g −1 at 1 A g −1 , coupled with outstanding flexibility. The SNACM-2 demonstrates a high-energy density of 9.8 W h kg −1 at a power density of 0.5 kW kg −1 . This study presents a successful strategy for transforming low-valued, eco-friendly natural polymers into renewable, high-performance carbon materials for supercapacitors.
研究领域:
材料科学
·
能源存储
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xuedi Yang,Vivian F. Lotfy,Altaf H. Basta,Hao Liu,Shiyu Fu
As biomass, rice straw (RS) is often valorized as a precursor of green products. In this respect, the RS-based carbon quantum dots (CQDs) are synthesized doped with N and S during the preparation. Synergistic doping with lipoic acid and ethylenediamine can vastly increase the yield of CQD from rice straw from 6.14 % to 62.8 %, and sulfur doping plays a more important role on the surface functional groups of the quantum dots. Further assessment is achieved toward the performance of SN-CQDs-hydroxypropyl cellulose nanocomposites. The optical behavior of synthesized SN-CQDs, and the critical concentration of its liquid crystal behaviors, at which the anisotropic phase begins to emerge, is approximately 1 %. Incorporating it into HPC, especially at 5 %, provided nanocomposite films with effective liquid crystal, tensile strength, and thermal stability. This sample's texture reveals a planar structure with colors ranging from yellow to red. The synergistic effect of incorporating SN-CQDs is shown by improving the strength to ~282.1 %, and the activation energy increased from 583.6 kJ.mol −1 to 615.1 kJ/mol. HPC-SN-CQDs can be assembled into an LED device, emitting warm light, of which CIE coordinate is (0.34,0.43).
研究领域:
材料科学
·
生物质工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Lu Zhong,Yuejia Qin,Zenan Zhou,Lianyun Zhong,Jietian Liang,Shaohui Hu,Qifan Liu,Yanfei Zeng,Shunmin Yi,Hui You,Shengkui Zhong,Dongliang Yan
Olivine-type lithium iron phosphate (LFP) serves as a prominent cathode material for Li-ion batteries, attributed to its natural abundance, remarkable cycling stability, eco-friendliness, and cost-effectiveness. Nonetheless, its additional utilization has been constrained by its inherent low conductivity and sluggish lithium-ion diffusion rate. Incorporation of heteroatom-doped carbon coatings serves as an effective method to enhance the electrochemical properties of LFP, leading to a notable improvement in both the electronic and ionic conductivity of the material. At present, however, the preparation of heteroatom-doped carbon cladding layer is mostly done by secondary sintering method, which is too cumbersome. In this paper, lithium iron phosphate containing N- and S-element doped carbon layers is synthesized by a simple one-step ball milling method using zein as a source of carbon layers and heteroatoms. The results show that the N- and S-doped carbon-coated lithium iron phosphate prepared from zein has lower polarization by enhancing the diffusion kinetics of the lithium-ion battery. NS/C15@LFP shows an initial discharge specific capacity of 155.97 mAh·g −1 at 0.1C and still shows 84.06 mAh·g −1 at 20C. After returning to 0.1C, there is still a discharge capacity of 161.4 mAh·g −1 . The capacity retention rate is 87 % after 500 cycles at 1C and 89 % after 500 cycles at the high current density of 5C, suggesting its excellent electrochemical performance. This work shows that lithium iron phosphate coating N- and S-doped carbon synthesized by using zein as the carbon source and heteroatom donor is a simple and low-cost strategy that gives LFP excellent electrochemical performance.
研究领域:
材料科学
·
能源科学
✓ 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）