DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Peng Bao,Yaning Li,Wei Xiao,Wenxiang Bian,Jian Li,Mingshuai Xue,Saichao Song,Boliang Wang
Although 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (CL-20) is one of the best high-energy explosives, its application is severely limited by its high sensitivity. Herein, a composite wax-film with interfacial crosslinking anti-falling was designed and fabricated to desensitize CL-20. It was filled with nano-silica powder (n-Si), nano-graphenes (n-GPNs) and multi-walled carbon nanotubes (MWCNTs) as insensitive enhancers. A unique and stable core-shell composite explosive was prepared, and characterized by DSC , SEM, TEM, XRD , XPS as well as mechanical sensitivity tests. The results suggested that the functional group interaction and structural strengthening between enhancers and microcrystalline wax (MW) further enhanced the desensitization ability of the composite film for CL-20. Because of the hydrogen bonding and thickening enhancement, the CL-20 crystal was uniformly coated with a nano-composite film. Three enhancers were demonstrated to be highly compatible with CL-20. In comparison with MW@CL-20, The E a , T p0 and T b of the composites containing n-GPNs increased by >375.27 kJ·mol −1 , 21.04 °C and 18.27 °C, respectively. The SEM and XPS results showed that the composite performed a complete core-shell structure with thermal softening resistance and superior coverage (98.20 %). The insensitive enhancer was also distributed and embedded in the MW-film matrix. Besides, the anti-fall and cross-linking properties of the film enable the mechanical sensitivity of the composite explosive to reach to a level better than that of WO 3 /Al nanothermite with 5 wt% polyaniline and polymer-bonded explosive (PBX) with 95 wt% LLM-105 and 5 wt% ternary composite. The heterogeneous composites demonstrated excellent mechanical safety and high energy performance. These findings can provide a reference for the efficient desensitization of CL-20.
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Scientific Reports
·
2025
·Vol. 15
·期 1
·1-16
·
IF 3.9
Wu Yongming,Pei Kexuan,Zhou Jiayu,Xiong Jianzhong,Liu Yu,Li Panrong,Li Fangfei,Wang Jiaqi,Liu Xiangmin,Deng Mi,Wu Chenxi
A novel substitute for perfluorooctane sulfonate (PFOS), 6:2 Chlorinated polyfluoroalkyl ether acid (6:2 Cl-PFAES, F-53B), has been widely used in the electroplating and firefighting industries, raising concerns due to increasing environmental prevalence. This study systematically investigated the adsorption characteristics of F-53B by coconut shell activated carbon (CSAC) and elucidated the underlying mechanisms through adsorption kinetics, isotherm modeling, and multi-scale characterization. Results show that the maximum adsorption capacity of CSAC for F-53B reached 261.64 mg/g, with the process best described by the pseudo-second-order kinetic model (R 2 > 0.97) and the Langmuir isotherm (R 2 > 0.94). Intraparticle diffusion modeling revealed a three-stage adsorption sequence: surface adsorption (0–2 h), pore diffusion (2–8 h), and dynamic equilibrium (8–48 h). Solution pH influenced adsorption efficiency by regulating surface charge. Under acidic conditions (pH < point of zero charge, pHzpc = 4.49), strong electrostatic interactions between protonated CSAC surfaces and anionic F-53B resulted in an 85% removal efficiency. In contrast, alkaline conditions (pH > 7) led to a 70% reduction in adsorption efficiency ( p < 0.05) due to electric repulsion. The microporous-dominated structure of CSAC (specific surface area: 857.69 m 2 /g; pore volume: 0.34 cm 3 /g) facilitated synergistic adsorption mechanisms. Oxygen-containing functional groups (C-O, -OH) promoted hydrogen bonding and hydrophobic interactions, enhancing F-53B adsorption. Besides, CSAC is optimized for emergency scenarios, it achieves 99.9% removal efficiency for 1 mg/L F-53B within 8 h at room temperature, with a maximum capacity of 261.64 mg/g; also, it maintains > 85% removal efficiency under wide pH conditions and tolerates coexisting ions (e.g., Cl − , SO 4 2− , Ca 2+ ).This study highlights the multi-mechanistic synergy of CSAC in theremoval of F-53B, providing theoretical foundations and technical insights for biochar-based remediation of emerging contaminants.
研究领域:
环境科学
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化学工程
·
水处理
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吸附技术
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材料科学
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhiang Hou,Jiangfeng Chu,Cong Liu,Jinnan Wang,Aimin Li,Tong Lin,Corvini Philippe François-Xavier
Photocatalytic denitrification has attracted great attention owing to its high efficiency and environmentally friendly features. However, selectively photocatalytic reduction of high concentration nitrate to N 2 is still a challenging problem due to the competition of photons between nitrate and photocatalysts. Herein, the Ag/SiO 2 core encapsulated in the crystalline TiO 2 shell (Ag/SiO 2 @ c TiO 2 ) was constructed for improvement of photocatalytic denitrification. Finite difference time domain (FDTD) simulation demonstrated that strong light scattering improved light harvesting via optical confinement. Meanwhile, surface plasmon resonance and electron sink effect of Ag not only enhanced the photogenerated electrons density but also promoted charge carriers separation of Ag/SiO 2 @ c TiO 2 . More importantly, e cb − of TiO 2 -shell could be immediately transferred to Ag to keep the balance between Ag 0 and Ag + , which contributed to the good stability of Ag/SiO 2 @ c TiO 2 . 95.8% nitrate ( C 0 = 2000 mg/L) was removed by 5 wt%Ag/SiO 2 @ c TiO 2 with N 2 selectivity of 93.6% within 4 h. Even after five cycles, 5 wt%Ag/SiO 2 @ c TiO 2 still remained high photocatalytic denitrification efficiency (92.2%). Notably, since TiO 2 -shell prevented the reaction between Ag and Cl − , more than 92% nitrate could be removed within 5.3 h in the presence of high concentration Cl − .
研究领域:
环境科学
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材料科学
·
化学工程
·
催化
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 26
·1-11
·
IF 2.8
Li Xiao-Bing,Ma Xiao-Ye,Zhang Xue-Feng,Jia Guo-Liang,Zhao Zhao-Ye,Wang Jun-Chuan,Wang Hui,Wu Xiang-Feng
In this work, PCN-224(Fe) porphyrin-based metal–organic frameworks and a Poly(ionic liquids) (PILs) were used to prepare PCN-224(Fe)@PIL(Cl − ) composite films by UV polymerisation. The structure, morphology, chemical composition, and electrochemical properties of the as-prepared composite film were investigated. PCN-224(Fe) was coated with a kind of P(1-vinylpyridinium chloride as monomer) on the outside to improve the electron transfer efficiency, while an electrochemical system was employed to catalysis the persulfate (PS) decomposition for the efficient degradation of tetracycline (TC). Because of the cathodic reduction reaction, the continuous redox cycle between Fe 3+ /Fe 2+ was facilitated, which enhanced the degradation activity of persulfate on tetracycline. The PCN-224(Fe)@PIL(Cl − ) composite demonstrated a superior electrocatalytic degradation efficiency of 95.8% in just 40 min for the TC model pollutant, surpassing the 63.3% efficiency of pure PCN-224(Fe) within 60 min. This work shows a successful example of using PILs to enhance catalytic degradation activity and points out a direction of preparation of catalysts for activating persulfate (PS).
研究领域:
环境科学
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材料科学
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电化学
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高影响因子
ACS Earth and Space Chemistry
·
2024
·
IF 2.9
Cici Fan,Weigang Wang,Bo Shi,Zheng Sun,Maofa Ge
The relative rate method was used to determine the rate constant of Cl atoms and 3-buten-1-ol at ambient temperature and pressure. The main products of the reaction were identified as HCOOH with a yield of (50.07 ± 2.65)%, HCHO with a yield of (18.24 ± 0.65)%, HOCH2CHO with a yield of (18.69 ± 0.68)%, ClCH2CHO with a yield of (7.64 ± 0.25)%, respectively. The rate constant was (3.04 ± 0.36) × 10–10 cm3 molecules–1 s–1. The calculated theoretical rate constant was 2.91 × 10–10 cm3 molecules–1 s–1, which was in agreement with the experimental results. Moreover, the theoretical calculation showed that the two Cl-addition pathways were the main reaction pathway, but the proportion of H-abstraction pathways reached 29%, and its importance cannot be ignored. Based on this, the possible reaction mechanisms were deduced. The atmospheric implications of the obtained title reaction were briefly discussed.
研究领域:
大气化学
·
物理化学
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ACS Omega
·
2024
·
IF 3.7
Ruonan Yao,Jiawei Lin,Kunjie Liu,Yuanchang Xu,Boyi Xiao,Jing Zhao,Zhongnan Guo,Quanlin Liu,Wenxia Yuan
Low-dimensional tin-based halide perovskites are considered as eco-friendly substitutions of the iconic lead-based perovskites to host the potential as optoelectronic materials. However, a fundamental understanding of the structure–property relationship of these Sn(II)-based hybrids is still inadequate due to the limited members of this material family. To our knowledge, there is still lack of reports on a series of Sn(II)-based halide perovskites with the same organic cation but covering chloride, bromide, and iodide. In this work, three new halide perovskites TMPDASnX4 (X = Cl, Br, I) (TMPDA = N,N,N′,N′-tetramethyl-1,4-phenylenediamine) are successfully synthesized, which provide the ideal paradigm to study the halogen-dependent evolution of the structure and properties of Sn(II)-based hybrid perovskites. Despite sharing the same monoclinic lattice (P21/m space group), it is demonstrated that TMPDASnCl4 adopts a one-dimensional structure composed of a five-coordinated pyramid configuration due to an extremely long Sn···Cl distance, while the typical two-dimensional motif is still maintained in TMPDASnBr4 and TMPDASnI4. The ambient stability is declined in the order from chloride to bromide and then to iodide. TMPDASnCl4 exhibits a broad-band bluish-white-light emission (centered at 515 nm, full width at half-maximum (fwhm) = 193 nm) with the Commission Internationale de l′ Elairage (CIE) coordinates as (0.29, 0.34). Further, the correlated color temperature and color-rendering index were determined as 7617 K and 80.5, respectively. Based on the synthesis of new crystals, our work sheds light on the composition–structure–property relationship of hybrid Sn(II)-based halide perovskites.
研究领域:
材料科学
·
光电
·
化学
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PubMed
高影响因子
ACS Catalysis
·
2026
·
IF 13.6
Ningchao Zhu,Chunlan Chen,Zhongyao Zhang,Xiaohu Ge,Yueqiang Cao,Xiangzhou Liao,Xinggui Zhou,De Chen,Weikang Yuan,Xuezhi Duan
Selective dehydrochlorination of HCFC-244bb is a key step toward the synthesis of next-generation HFO-1234yf refrigerants, yet achieving high selectivity is hindered by competitive C−F bond activation. Herein, we report a series of Ni- and Cr-based catalysts with systematically tuned surface Lewis acidity. Mechanistically informed spectroscopic characterization and electronic structure analysis demonstrate that ligand electronegativity and metal oxidation state regulate the metal−ligand bonding continuum from predominantly covalent to increasingly ionic character. Catalytic testing reveals a pronounced trade-off between activity and selectivity, with NiO achieving an HFO-1234yf selectivity of 91.36%. Density functional theory calculations and frontier molecular orbital analyses identify the conduction band minimum (CBM) energy as a decisive electronic descriptor for selectivity. An S-shaped correlation between CBM energy and selectivity thereby emerges, providing a predictive framework for the rational design of high-performance dehydrohalogenation catalysts through band-structure engineering.
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INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Mengjun Xiao,Yu Gui,Andraž Mavrič,Yao Nie,Wendong Zhang,Peng Chen,Pengpeng Wang,Yi Wang
The chlorine evolution reaction (CER) is essential for industrial chlorine production. However, achieving high CER selectivity remains a challenge due to the high cost and narrow potential gap between the CER and the competing oxygen evolution reaction (OER) in conventional noble oxide catalysts. In this work, Hemin is adopted as a model molecular catalyst for CER owing to its porphyrin macrocycle and the axial Cl ligand, achieving an overpotential of ∼190 mV at 10 mA cm–2 with ∼100% chlorine selectivity and excellent stability over 100 h in corrosive acidic brine. Spectroscopic and electrochemical analyses reveal that the axial Cl–Fe interaction stabilizes the rigid configuration geometry of the Hemin molecule, while the π-conjugated macrocycle and the Fe-centered electronic effect jointly modulate the electronic state of Fe. This combination effectively suppresses electrochemical demetalation and preserves structural integrity for enhancing selectivity and durability. It is hoped that this work can propose fundamental insight into the rational design of efficient molecular electrocatalysts for promoted chlorine evolution.
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高影响因子
Crystals
·
2026
·Vol. 16
·期 6
·368
·
IF 2.9
Xiaolu Mao,Changsheng Yin,Yang Cao,Xiaodong Shen,Wenbo Xin
Carbon nanotubes (CNT) are among the strongest candidates for electromagnetic interference (EMI) shielding materials because of their excellent performance. However, when assembled into macroscale materials, their conductivity is usually limited to 104S/m, restricting further application as shielding materials. Here, we prepared a carbon nanotube composite film (Au/Cl-CNT) with high conductivity and excellent EMI properties. Characterizations confirm that Au exists in the form of uniform Au plates and particles anchored on the CNT surface, while Cl is doped into the CNT framework as halogen dopants. The optimized Au/Cl-CNT film delivers an ultra-high electrical conductivity of 3.39 × 105S/m, which is approximately 23 times higher than that of the pristine CNT film. The excellent electrical properties of the Au/Cl-CNT films endow them with excellent EMI shielding effectiveness (SE). Au/Cl-CNT films with a thickness of ~10.5 μm achieve an EMI SE of up to 67 dB across both the X-band and Ku-band. The superior EMI SE mainly results from the combined effect of various mechanisms, namely reflection inside and outside the material, as well as absorption inside the material. This work clarifies the synergistic enhancement mechanism of Au and Cl on CNT conductivity and EMI shielding, offering new insights into halogen-modified shielding materials.
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Journal of the American Chemical Society
·
2020
·
IF 14.612
Xianju Zhang,Xianxin Wu,Xiaoyu Liu,Gaoyu Chen,Yongkai Wang,Jianchun Bao,Xiangxing Xu,Xinfeng Liu,Qi Zhang,Kehan Yu,Wei Wei,Jingjing Liu,Jun Xu,Hua Jiang,Peng Wang,Xun Wang
Perovskite and chalcogenide quantum dots (QDs) are important nano semiconductors. It has been a challenge to synthesize heterostructural QDs combining perovskite and chalcogenide with tailorable photoelectronic properties. In this report, heterostructural CsPbX3-PbS (X = Cl, Br, I) QDs were successfully synthesized via a room temperature in situ transformation route. The CsPbX3-PbS QDs show a tunable dual emission feature with the visible and near-infrared (NIR) photoluminescence (PL) corresponding to CsPbX3 and PbS, respectively. Typically, the formation and evolution of the heterostructural CsPbBr3–PbS QDs with reaction time was investigated. Femtosecond transient absorption spectroscopy (TAS) was applied to illuminate the exciton dynamics in CsPbBr3–PbS QDs. The mild synthetic method and TAS proved perovskite to PbS energy transfer may pave the way toward highly efficient QD photovoltaic and optoelectronic devices.
研究领域:
材料科学
·
光电子学
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高影响因子
ADVANCED MATERIALS
·
2015
·Vol. 27
·期 35
·5176-5183
·
IF 17.493
Liu Y,Yang Z,Cui D,Ren X,Sun J,Liu X,Zhang J,Wei Q,Fan H,Yu F,Zhang X,Zhao C,Liu SF.
Two-inch-sized perovskite crystals, CH3 NH3 PbX3 (X=I, Br, Cl), with high crystalline quality are prepared by a solution-grown strategy. The availability of large perovskite crystals is expected to transform its broad applications in photovoltaics, optoelectronics, lasers, photodetectors, LEDs, etc., just as crystalline silicon has done in revolutionizing the modern electronics and photovoltaic industries.
研究领域:
材料科学
·
光电子学
·
光伏技术
·
晶体生长
·
半导体物理
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PubMed
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Mao-Yin Ran,Sheng-Hua Zhou,Wenbo Wei,Bang-Jun Song,Yong-Fang Shi,Xin-Tao Wu,Hua Lin,Qi-Long Zhu
Inorganic chalcohalides are attracting a tremendous amount of attention because of their remarkable structural variety and desirable physical properties. Although great advances have been made in recent years, functional inorganic chalcohalides with two-dimensional neutral layers are still rare. Herein, two novel chalcohalides CdSnSX2 (X = Cl or Br) with high yields were obtained by reacting CdX2 with SnS using a traditional solid-state method at 823 K. Both of these chalcohalides adopt orthorhombic space group Cmcm (No. 63) with the following structural values: a = 4.014(4)–4.064(2) Å, b = 12.996(2)–13.746(3) Å, c = 9.471(2)–9.621(2) Å, V = 494.1(8)–537.5(2) Å3, and Z = 4. The prominent architectural feature is the unique two-dimensional [CdSnSX2] neutral layer consisting of composite [CdX2] and [SnS] sublattices that are connected alternately through the Cd–S–Sn bonds along the ac plane. The [CdX2] sublattice consists of a single octahedral chain of Cd-centered [CdX4S2] groups sharing cis-X edges, while the [SnS] sublattice consists of a bend-shaped chain of unusual [SnS2X2] units sharing vertices of S atoms. Significantly, each CdSnSX2 form (X = Cl or Br) shows high visible-light-induced photocatalytic activity for rhodamine B degradation, which is ∼7.0 times higher than that of nitrogen-doped TiO2 (TiO2–xNx) under the same experimental conditions. This discovery enriches the categories of inorganic chalcohalides and provides more choices of candidate materials for photocatalytic applications.
研究领域:
无机化学
·
材料科学
·
光催化
·
固态化学
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高影响因子
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