FOOD CHEMISTRY
·
2019
·
IF 5.399
Xiupei Yang,Jing Xu,Na Luo,Fenglin Tang,Maoxue Zhang,Bin Zhao
Chemical doping with heteroatoms was employed to prepare N,Cl co-doped fluorescent carbon dots (N,Cl-FCDs) which may be designed for the detection of tartrazine. Using urea as the N source and FeCl 3 · 6H 2 O as the Cl source, N,Cl-FCDs were synthesized by hydrothermal method with carbon dots prepared from aloe. Compared with pure carbon dots (CDs), N,Cl-FCDs resulted in dramatic improvement in the fluorescence properties and surface physical chemical properties. The fluorescence quantum yield of the N,Cl-FCDs was as high as 60.52%. As an effective fluorescence probe for tartrazine, a good linear relationship between N,Cl-FCDs and tartrazine was constructed at the concentration range from 0.1 to 30 μM with a detection limit of 48 nM based on the mechanism of fluorescence resonance energy transfer (FRET). The proposed fluorescent probe method was successfully applied to detect tartrazine in beverages, which is expected to have a potential application in the field of food analysis.
研究领域:
食品科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 18
·18001-18014
·
IF 2.8
Xu Zhengming,Han Dexia,Li Yuan,Zhang Pingling,You Lijun,Zhao Zhengang
In this study, the FPA90-Cl resin was magnetized with supported Fe 3 O 4 particles using a chemical co-precipitation method and its removal performance of bromate and coexisting precursors was explored. The magnetized FPA90-Cl resin was structurally characterized by SEM, FT-IR, and XRD. The effects of the initial concentrations, temperature, and resin dosage on bromate and bromide ion removal in drinking water were investigated using batch experiments. The magnetized FPA90-Cl resin exhibited a high removal efficiency for bromate and bromide ions at three initial concentrations, and the residual bromate concentrations were under the maximum contaminant level (MCL) of 10 μg L −1 after 80 min. The adsorption data of bromate and bromide ion could be well described by a pseudo-first-order kinetic model ( R 2 ˃ 0.98). The bromate removal alone was further studied by varying the initial solution pH, temperature, and competitive anions. The results showed that the magnetized FPA90-Cl resin could be used over a wide pH range (4.0–9.0). The maximum sorption capacity of the magnetized FPA90-Cl resin for bromate reached 132.83 mg g −1 at 298 K. The Freundlich and Redlich-Peterson isotherm models fit the bromate adsorption equilibrium better ( R 2 ˃ 0.99) than the Langmuir isotherm model ( R 2 ˃ 0.98). The thermodynamic analysis showed that the bromate adsorption process was endothermic. The negative ΔG and positive ΔS indicated that the process was spontaneous and that randomness increased after adsorption, respectively. The competition of coexisting anions with bromate was in the order of SO 4 2− > CO 3 2− > Cl − > NO 3 − > HCO 3 − > PO 4 3− . Additionally, the magnetized FPA90-Cl resin could maintain a high bromate and bromide ion adsorption capacity after five cycles of regeneration by a 0.1 M NaCl solution.
Graphical abstract
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
FirePhysChem
·
2025
·
IF 3.6
Chunyan Li,Shenjuan Shao,Jiao Chen,Chongwei An,Baoyun Ye
The development of miniaturized, flexible MEMS pyrotechnic devices necessitates advanced fabrication techniques. Herein, a strategy is reported that leverages the integration of ink-jet printing and dynamic cross-linking. The strategy successfully fabricates CL-20/PVA (polyvinyl alcohol)@PANI (polyaniline) energetic films with robust interfacial adhesion across heterogeneous structures. The PVA@PANI dynamic bonding system, designed through a molecular engineering strategy, provides dual interfacial enhancement characteristics. The 3D network structure formed by dynamic covalent cross-linking of borate ester bonds significantly enhances the flexibility of the system, as demonstrated by a 62.26% improvement in elastic recovery and a 55.26% increase in the plasticity index. Additionally, multiple hydrogen bonding interactions between hydroxyl groups and the substrate substantially improve interfacial adhesion, achieving a 4B rating on both glass and aluminum substrates. SEM characterization reveals a uniform and dense microstructure with homogeneously distributed crystals throughout the composite film. Performance testing confirms that CL-20 in the composite retains its ε-crystal form and exhibits a high detonation velocity of 7884 m·s⁻¹. Furthermore, the synergistic incorporation of PANI reduces the electrostatic sensitivity by 10.86% compared to the CL-20/PVA baseline. The interfacial dynamic enhancement technology developed in this work represents a key advancement in the integrated structure–function design of microscale energetic devices, underscoring its strong potential for MEMS applications such as flexible micro-initiators and miniature solid propellants.
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2025
·
IF 4.3
SongYuChen Ma,Tao Liu,DeQi Wang,YinHui Li,WenJing Shi,FengSheng Li,Jie Liu
To address the quality issues arising from the uncontrollable morphological grain size in the preparation of CL-20/HMX cocrystals, a novel method for producing high-quality cocrystals with well-defined morphological grain sizes has been developed. The cocrystallization process was conducted using the solvent/nonsolvent method, wherein the mixing efficiency and solution supersaturation were precisely controlled through systematic optimization of key parameters, including solvent composition, solvent/nonsolvent ratio, reaction temperature, and stirring rate. Through systematic optimization of experimental parameters, three distinct rhombohedral CL-20/HMX cocrystal samples with uniform particle size distributions and well-defined morphologies were successfully prepared, exhibiting characteristic D50 values of 20, 63, and 130 μm. Comprehensive characterization revealed that SEM analysis demonstrated the cocrystals possess smooth surfaces and regular geometric shapes. Combined XRD and micro-CT analyses confirmed the high crystallinity of the cocrystals, particularly noting the reduced internal defects and superior crystal perfection in larger-grained samples. DSC measurements indicated enhanced thermal stability in cocrystals with larger particle sizes. Furthermore, sensitivity testing showed larger-grained cocrystals are less sensitive than smaller-grained ones, which can be attributed to the more compact internal structure of the crystals.
研究领域:
材料科学
·
爆炸物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Handong Shi,Shijiao Li,Kai Han,Chuanhao Xu,Lei Gao,Fan Liao,Yanpeng Lv,Yurong Zhang,Chongwei An
This study presents a strategy for developing CL-20 (Hexanitrohexaazaisowurtzita-ne)-based energetic composites with enhanced mechanical properties and intrinsic safety through the synergistic design of PVA (polyvinyl alcohol) /PAA (polyacrylic acid) interpenetrating polymer networks (IPNs) and direct ink writing (DIW) technology. Based on the “hydrogen bond-covalent bond-plasticization” synergistic reinforcement strategy, an IPNs gel system with tunable mechanical properties was developed. After optimizing the polymer ratio (4:3), Crosslinking agent (1 %), and glycerol content (17.5 %), a balance between toughness, ductility, and strength was attained. The DIW-printed structure exhibited excellent molding accuracy and interfacial adhesion (0.924 MPa to aluminum). System characterization demonstrated that the IPN structure achieved uniform CL-20 distribution and controlled porosity, significantly enhancing its mechanical properties, safety, and detonation performance. Its elastic modulus is close to that of engineering plastics(4.504 GPa), the hardness is between soft rubber and hard plastics (0.107 GPa), and the compressive strength is higher than that of typical PBX explosives (15.64 MPa). By using PVA/PAA IPNs, a “topological entanglement-passivation defect” mechanism was established to suppress mechanical sensitivity. Compared to submicron ε-CL-20, the molded sample reduced impact sensitivity by 33.3 % and friction sensitivity by 128.6 %. Additionally, detonation propagation was achieved in a 1.2 × 1.2 mm charge slot within a 90°-160° corner range, with the critical detonation transmission size reaching 0.3 × 0.3 mm and the detonation velocity maintained at 7362 m/s (82.4 % theoretical detonation velocity). This study offers a scalable manufacturing framework for developing energetic devices that combine mechanical properties, intrinsic safety, and adaptability to complex structures.
研究领域:
材料科学
·
爆炸化学
·
先进制造
✓ 已验证
产品关联
DOI
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2021
·Vol. 46
·期 12
·1837-1843
·
IF 1.887
Shuyi Duan,Feng Ding,Haitao Sun,Chun Xiao,Shangbin Li,Qing Zhu
To have a deep understanding of the effects of surface wettability on the mechanical sensitivity and rheological characteristics of PBX slurry, CL-20 particles with hydrophilic property was prepared through a polymerization process of dopamine, and CL-20 particles with hydrophobic property were prepared through a condensation polymerization process of hexadecyltrimethoxylsilane. The morphology, surface element content and surface wettability of CL-20 crystals before and after modification were characterized by scanning electronic microscope (SEM), X-ray photoelectron spectroscopy (XPS), and contact angle test. The rheological characteristics of CL-20 based PBX slurry showed that the interaction between explosive particles and binder was changed with different surface wettability of CL-20. The weaker interaction between CL-20@hydrophobic and binder lead to weaker solid-liquid friction, resulted in lower apparent viscosities of CL-20@hydrophobic based PBX slurry at high shear rate. The mechanical sensitivity of wax coated CL-20 with different surface wettability was tested. CL-20@hydrophobic-wax exhibited better mechanical stability compared to CL-20-wax and CL-20@hydrophilic-wax, probably owning to the weaker interaction between CL-20@hydrophobic surface and wax.
研究领域:
爆炸物化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Applied Sciences-Basel
·
2020
·Vol. 10
·期 8
·2663
·
IF 2.474
Honglei Zhang,Qingjie Jiao,Wanjun Zhao,Xueyong Guo,Dayong Li,Xiaole Sun
Featured ApplicationWe aimed to obtain a dense ε-CL-20/polydopamine core-shell structure by chemical bionic technology that can effectively inhibit the solid–solid phase transition existing for CL-20 crystals and greatly enhance the thermal safety. Obtained well-coated CL-20 particles could be employed in high-energy insensitive polymer bonded explosives (PBX), thus promoting the development of weapons and equipment.Abstract2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (CL-20) is a widely used high-energy explosive for the application of energetic materials. However, the phase transformation from ε-CL-20 to γ-CL-20 restrains its further application in polymer bonded explosives (PBXs) and propellants. To inhibit the phase transition of CL-20, dopamine was first used in an efficient and facile method of in situ polymerization to passivate CL-20 crystals. The core-shell microcapsule particles were obtained, and the morphological characterization demonstrates the formation of a dense core-shell structure. The differential scanning calorimetry (DSC) and in situ X-ray diffraction (XRD) test results show that the compact and dense coating delays the ε-CL-20 crystal transformation temperature by about 30 °C, which enhances thermal stability. In addition, with the coating via polymers, the friction sensitivity of ε-CL-20 crystals decreases significantly. The findings indicate a successful application of dopamine chemistry in high-energy explosives, which provides an attractive method to modify the properties of CL-20 crystals.Keywords:energetic crystal;phase transition;CL-20;dopamine;core-shell structure
研究领域:
材料科学
·
化学工程
·
炸药技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Hui Wang,Hongtu Zhao,Wenbo Wu,Shifan Xu,Na Wang,Ting Wang,Xin Huang,Lina Zhou,Ying Bao,Hongxun Hao
The solubility performance of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane has been investigated by the combination of experimental measurement, solvent parameter analysis, and molecular simulation methods. The solubility in 10 pure solvents at 293.15 K to 343.15 K was determined. It was found that the solubility in nine solvents increased with temperature, except for isoamyl propionate. However, it has the largest solubility in isoamyl propionate (4.36 × 10 −2 ∼ 5.39 × 10 −2 ). Additionally, a correlation analysis was performed using four equations, which showed that the NRTL equation provided the best fit (overall average relative deviation = 3.74 %, overall coefficient of determination = 0.991). Moreover, the solvent effect was analyzed by Hansen solubility parameters, predicting good solubility in solvents with R a(V) ≤ 12.47 MPa 0.5 or Δ δ t ≤ 7.77 MPa 0.5 , indicating weak polarity of solvent and weak solvent–solvent intermolecular hydrogen bonds enhance dissolution. Furthermore, molecular electrostatic potential surface and radial distribution function analyses provided that weak hydrogen bonding C-H···O promotes dissolution.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 22
·5908-5915
·
IF 5.976
Gaoliang Fang,Daqin Chen,Su Zhou,Xiao Chen,Lei Lei,Jiasong Zhong,Zhenguo Ji
Successful development of all-inorganic CsPbX3 (X = Cl, Br, or I) perovskite quantum dots (PQDs) has been witnessed due to their unique optical and electrical properties. However, the heavy usage of Pb element in PQDs has limited the commercial application of these PQDs, and the preparation of low-Pb or Pb-free PQDs is imperative. In this study, we report room-temperature reverse synthesis of CsPbxMn1−xCl3 PDQs from CsMnCl3 precursor nanocrystals through cation exchange. Interestingly, two-step phase transformation processes from hexagonal CsMnCl3 to rhombohedral Cs4PbxMn1−xCl6 and finally to cubic CsPbxMn1−xCl3 are evidenced. With an increase in the reaction time, Mn2+ ions in the PQD lattice are gradually replaced by Pb2+ ions. Notably, Mn2+ d → d broadband luminescence is not detected for the Cs4PbxMn1−xCl6 product, but it is intense for the CsPbxMn1−xCl3 sample owing to efficient energy transfer from CsPbCl3 to Mn2+. Moreover, it is found that the introduction of Br− into the reaction system will prohibit the complete phase transformation from rhombohedral Cs4PbxMn1−x(Cl/Br)6 to cubic CsPbxMn1−x(Cl/Br)3. By controlling the ratio between the CsMnCl3 precursor and PbBr2, tunable luminescence is easily achieved due to the combined emissions from both CsPb(Cl/Br)3 PQDs and Mn2+-emitting centers.
研究领域:
材料科学
·
纳米技术
·
光电
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Yuwen Sun,Baogui Zheng,Xiaowen Wu,Lianyi Wang,Jiacheng Jiang,Hao Ding,Xin Min,Zhaohui Huang,Minghao Fang,Ruiying Luo
Graphitized carbonitride (g-C3N4) is widely used in CO2 reduction, hydrogen production, and degradation of toxic chemical dyes and antibiotics. It is a kind of photocatalytic material with excellent performance, and it has the advantages of being safe and nontoxic, having a suitable band gap (2.7 eV), and having a simple preparation and high stability, but because of its fast optical recombination speed and low visible light overutilization, the multifunctional application of g-C3N4 is seriously hindered. Compared with pure g-C3N4, MWCNTs/g-C3N4 have a red-shift in the visible range and a strong absorption in the visible region. Melamine and carboxylated multiwalled carbon nanotubes were used as raw materials to successfully prepare CMWCNT modified g-C3N4 doped with P, Cl by a high temperature calcination method. The effect of the addition amount of P, Cl on the photocatalytic performance of modified g-C3N4 was studied. The experimental results show that the multiwalled carbon nanotubes can accelerate the electron migration, and the doping of P, Cl elements can change the energy band structure of g-C3N4 and reduce the band gap. Through fluorescence analysis and photocurrent analysis, it is known that the incorporation of P, Cl reduces the recombination efficiency of photogenerated electron–hole pairs. In order to explore the application in the degradation of chemical dyes, the photocatalytic degradation efficiency of RhB under visible light was studied. The photocatalytic performance of the samples was evaluated by photodecomposition of aquatic hydrogen. The results showed that when the amount of ammonium dihydrogen phosphate was 10 wt %, the photocatalytic degradation efficiency was the highest, which was 21.13 times higher than that of g-C3N4.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Futing Sun,Zesen Gao,Yan Yang,Haijie Chen
The halides have attracted much attention as novel solid electrolytes because of their easy synthesis, high electrochemical stability, and high ionic conductivities. However, the reported halides for solid electrolytes are still understudied compared with the oxides and sulfides. Here, we studied the Li–Fe–Cl phases that include Li2FeCl4 and Li6FeCl8. Using the self-doping approach, a maximum ionic conductivity of 2.0 × 10–4 S cm–1 at 50 °C was achieved for Li1.8Fe1.1Cl4. It was improved by 3 orders of magnitude compared with that of Li2FeCl4 (8.27 × 10–7 S cm–1 at 50 °C). For the Li|Li1.8Fe1.1Cl4|Li half-cell, it cycled for 2000 h at 50 °C under a current density of 0.01 mA cm–2, indicating an acceptable compatibility between Li2FeCl4 and Li. Finally, an all-solid-state battery was successfully assembled with Li1.8Fe1.1Cl4@LFP as the cathode, Li1.8Fe1.1Cl4 as the electrolyte, and a Li sheet as the anode. The initial specific charge capacity of the battery was 76.36 mAh g–1 at 0.1C and 50 °C. The initial Coulombic efficiency was 73.06%. This study suggests Li2FeCl4 as a new solid electrolyte, and the introduction of Li vacancies into the Li site is an efficient way to improve the electrochemical properties of halides.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Tengyue Song,Yuhuai Shi,Xueli Zhang,Wenhui Wang,Wenkuang Pan,Guangwei Xiao,Mengli Yin,Xiong Cao
Energetic solid propellants are critical technologies for advancing strategic and tactical weaponry. To further develop the application of CL-20 to energetic solid propellants, it is necessary to explore more efficient catalysts to enhance their thermal decomposition characteristics. In this paper, three composites of nickel–iron layered double oxides doped with 0 wt%, 5 wt% and 20 wt% g-C 3 N 4 (NiFe-LDO/g-C 3 N 4 ) were synthesized by co-precipitation and heat treatment methods. These composites were characterized using Scanning electron microscope (SEM), X-Ray diffractometer (XRD), Fourier transform infrared (FT-IR) spectrometer, and X-ray photoelectron spectrometer (XPS). Three prepared composites were tested for catalytic pyrolysis performance of CL-20 using Differential scanning calorimeter (DSC). The results show that NiFe-LDO/g-C 3 N 4 has an excellent layered structure and can significantly enhance the thermal decomposition performance of CL-20. Compared with 253.52 °C for raw CL-20, the thermal decomposition peak temperatures decreased to 246.61 °C, 245.64 °C and 244.08 °C after addition of the three catalysts, respectively. Additionally, the activation energies declined from 234.02 kJ·mol −1 to 192.55 kJ·mol −1 , 176.33 kJ·mol −1 and 160.78 kJ·mol −1 . Then, a potential catalytic mechanism is proposed. This study shows that NiFe-LDO/g-C 3 N 4 serves as a high-quality catalyst for the enhancement of CL-20 thermal decomposition performance, with further prospective applications in solid propellants.
研究领域:
材料科学
·
能源技术
·
催化化学
✓ 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）