ACS Omega
·
2022
·
IF 4.132
Jian Yao,Bin Li,Lifeng Xie
Micrometer-sized spherical composites based on 2,4,6,8,10,12-hexanitrohexaazaisowurtzitane (CL-20) with fluororubber (F2604), dioctyl sebacate (DOS), and polyvinyl butyral (PVB) were prepared by an electrospray method. After preparation, the morphology, chemical bonds, thermal decomposition properties, mechanical sensitivity, and explosion performance were characterized. The main explosive CL-20 transformed from ε-CL-20 to β-CL-20 after electrospray preparation. With an insensitive additive mass ratio of 5 wt %, the CL-20/F2604 composite had the highest maximum peak exothermic temperature and the lowest mechanical sensitivity. The explosion pressures of the composites with the same mass ratio of additives decreased in the order CL-20/F2604 > CL-20/PVB > CL-20/DOS and were lower than that of raw CL-20.
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PubMed
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2023
·Vol. 48
·期 7
·e202200317
·
IF 1.8
Jian Guan,Huan Peng,Yulan Song,Bo Jin,Rufang Peng
The thermal decomposition of Hexanitrohexaazaisowurtzitane CL-20/HMX-ammonium formate functionalized graphene oxide (Am-GO) composites was studied using an isothermal decomposition dynamics research instrument to explore the effects of Am-GO on the stability of CL-20/HMX co-crystal. The gas pressure-time curve generated by thermal decomposition reaches the decomposition inflection point at a decomposition degree of 85 %. Compared with CL-20/HMX co-crystal, the decomposition extent corresponding to the inflection point of the thermal decomposition curve of the composites increases. The activation energies of the composites before and after the inflection point of the pressure-time curve were 161.3 kJ/mol and 171.0 kJ/mol, respectively. The residual substances produced by the thermal decomposition of the composites were characterized by HPLC and FTIR. Results showed that CL-20 and HMX were decomposed before the inflection point of the decomposition pressure-time curve. However, the decomposition of CL-20 was completed before the inflection point, whereas that of HMX ran through the thermal decomposition process. The calculation results of thermal decomposition kinetics show that the addition of coating material increases the activation energy of co-crystal and stabilizes CL-20/HMX co-crystal.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 30
·42921-42930
·
IF 0
Ye Miaomiao,Luo Ziyi,Jin Wen,Wang Xingyuan,Zhang Tuqiao,Liu Xiaowei
The viewpoints on whether high concentrations of chloride ion (Cl − ) promote or inhibit the oxidation activity of activated persulfates are still inconclusive. Furthermore, the degradation of organic pollutants by the persulfates in the presence of high Cl − concentrations without any activation medium has not yet been studied. In this work, the efficiency and mechanism of degradation of organic pollutants such as carbamazepine (CBZ), sulfadiazine (SDZ), and phenol (PN) by Cl − -activated PMS (denoted as Cl − /PMS) were investigated. Results showed that Cl − could effectively activate PMS for the complete removal of CBZ, SDZ, and PN with reaction kinetic constants of 0.4516 min −1 , 0.01753 min −1 , and 0.06805 min −1 , respectively. Parameters such as PMS dose, Cl − concentration, solution pH, and initial concentrations of organic pollutants that affect the degradation efficiencies of the Cl − /PMS process were optimized. Unlike conventional activated persulfates, it was confirmed that the free chlorine was the main active species in the Cl − /PMS process. Finally, the degradation by-products of CBZ and SDZ as well as their toxicity were detected, and a possible degradation pathway for CBZ and SDZ was proposed. Though higher toxic chlorinated by-products were generated, the Cl − /PMS process was still an efficient oxidation method for the removal of organic pollutants in aqueous solutions which contain high concentrations of Cl − .
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PubMed
CRYSTENGCOMM
·
2023
·Vol. 25
·期 43
·6091-6095
·
IF 3.1
Jing Huang,Minghao Li,Zhanhui Liu,Jingyan Hua,Hui Zeng,Yunyun Chen,Jing Su
In this work, copper-based halides Cs2CuCl4, Cs2CuBr4 and mixed-halides Cs2CuCl2.8Br1.2, Cs2CuCl2Br2 and Cs2CuCl1.2Br2.8 single crystals were grown via the evaporation method using deionized water as a solvent. The structure and actual element component of the Cs2Cu(Cl, Br)4 crystals were studied using XRD and EDS. The halides of Cs2Cu(Cl, Br)4 exhibit both good light absorption and PL performance. The absorption peaks related to LMCT electron transition bands were observed, and the tunable band gap was obtained by adjusting the Br−/Cl− ratio. PL spectra show purple, blue, and green luminescence, and the luminescence mechanism was analyzed. Our study indicates that the Cs2Cu(Cl, Br)4 halides have application prospects in optoelectronic devices.
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高影响因子
Journal of the American Chemical Society
·
2013
·
IF 10.677
Peng Yu,Li-Ming Wu,Liu-Jiang Zhou,Ling Chen
Deep-ultraviolet nonlinear optical (deep-UV NLO) crystals are of worldwide interest for the generation of coherent light with wavelength below 200 nm by the direct second-harmonic generation (SHG) output from solid-state lasers. The unprecedented deep-UV NLO phosphates representing their own structure types, Ba3P3O10Cl (BPOC), Ba3P3O10Br (BPOB), have been discovered, which display moderate powder SHG intensities in type I phase matchable behaviors with a short UV cutoff edge of 180 nm (measured by a single crystal, one of the shortest values among phosphates to date). Insightfully, the geometry and polarization of the C1-P3O105– building unit are affected by the crystal packing. DFT calculations and cutoff energy dependent SHG coefficient analyses reveal that the SHG origin is from the cooperation of asymmetric C1-P3O105– anion, Ba2+ cation, and Cl–/Br– anion.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2026
·
IF 2.4
Linxue Yan,Tianyi Wang,Kangrui Sun,Kangnan Cheng,Jiantuan Jia,Yafei Guo,Tianlong Deng
Abstract The isothermal dissolution equilibrium method was employed to investigate the phase equilibrium and phase diagram of the ternary system (Na+, Cs+//Cl––H2O) at 313.15 K. This ternary system features the coexistence of double salts and solid solutions. The solid solution, formulated as ([Cs1–x(Na·H2O)x]Cl), was characterized by wet-residue analysis, X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, and thermogravimetry–differential scanning calorimetry (TG–DSC). Three representative equilibrium compositions of the solid solution and their respective proportions within the crystallization region were determined, and the results were compared with those of the two pure salts (NaCl and CsCl). The physicochemical property diagrams indicate that both density and refractive index increase with rising cesium chloride content. A comparative phase diagram of the ternary system (Na+, Cs+//Cl––H2O) was constructed over the temperature range from 298.15 to 318.15 K. The results show that as temperature increases, the crystallization region of NaCl expands, whereas the crystallization regions of CsCl·2NaCl·2H2O and [Cs1–x(Na·H2O)x]Cl simultaneously contract.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2010
·
IF 1.695
Li Jing,Zheng Danxing,Fan Lihua,Wu Xianghong,Dong Li
The aim of this work is to investigate improving the effects for adding ionic liquids (ILs) to the working fluids of absorption cycle, lithium bromide aqueous solution (H2O + LiBr), and lithium chloride aqueous solution (H2O + LiCl). 1,3-Dimethylimidazolium chloride ([Dmim]Cl) and 1,3-dimethylimidazolium tetrafluoroborate ([Dmim]BF4) were selected to be additives. The vapor pressure data were measured for the H2O + LiBr + [Dmim]Cl system (LiBr/[Dmim]Cl mass ratio = 3), H2O + LiBr + [Dmim]BF4 system (LiBr/[Dmim]BF4 mass ratio = 2), H2O + LiCl + [Dmim]Cl system (LiCl/[Dmim]Cl mass ratio = 2), and H2O + LiCl + [Dmim]BF4 system (LiCl/[Dmim]BF4 mass ratio = 2) by means of the boiling point method, at temperatures from (303.60 to 439.42) K and the mass fraction of absorbent species from 0.20 to 0.70, respectively. The Antoine-type equation was used to correlate the experimental data of the ternary systems, and the agreements with the experimental data were excellent; that is, the average absolute relative deviations (ARDs) for pressure between experimental and calculated values were 1.05 %, 0.75 %, 0.63 %, and 0.92 % for the systems. Compared with traditional working fluids of absorption cycle, H2O + LiBr and H2O + LiCl, the promising results show that four ternary systems investigated in this work might be used as alternative working fluids to improve the performances of absorption cycles and liquid desiccant dehumidification systems.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 5
·1-12
·
IF 2.8
Xing Xue,Cao Weiwei,Wu Zhaoxin,Bai Xiaohong,Gao Jiarui,Liang Xiaozhen,Wang Bo,Wang Chao,Xiang Junjie,Shi Dalian,Lv Linwei,Bai Yonglin
In this study, we investigated the microstructural and luminescence characteristics of high-linearity ZnS:Cu 2+ ,Cl − phosphor. Through conducting the method of high-temperature solid state reaction, we prepared the ZnS phosphors characterizing with two different doping concentrations of Cu 2+ ions. The prepared two kinds of ZnS phosphors exhibit two coexisting forms of cubic phase and hexagonal phase, to which the concentration of Cu 2+ imposes no influence on the microstructure of the phosphor. The average particle size is 2.68 ± 0.5 μm and the emission wavelength locating at approximate 460 nm attribute to the zinc vacancy. As the concentration of the Cu 2+ ions increases, the energy bandgap, the fluorescence lifetime and the luminescence intensity decrease, causing noticeable concentration quenching. In addition, the linear correlation between the emission intensity and the current of the prepared phosphors is stronger than that of commercial ones. The prepared ZnS:Cu 2+ ,Cl − phosphor with high linearity and short fluorescence lifetime has great potential to be applied in practical applications in the field of high-energy physics and astrophysical exploration.
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高影响因子
Defence Technology
·
2018
·
IF 0
Teng Chen,Yan Zhang,Shuang-feng Guo,Liu-ming Zhao,Wei Chen,Ga-zi Hao,Lei Xiao,Xiang Ke,Wei Jiang
A sol-gel freezing-drying method was utilized to prepare energetic nanocomposites based on 2, 4, 6, 8, 10, 12-hexanitro-2, 4, 6, 8, 10, 12-hexaazaisowurtzitane (CL-20) with 3, 3-Bis (azidomethyl) oxetane-tetrahydrofuran copolymer (BAMO-THF) as energetic gel matrix. Scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman, Fourier-transform infrared spectroscopy (FT-IR) and differential thermal analyser (DTA) were utilized to characterize the structure and property of the resultant energetic nanocomposites. Compared with raw CL-20, the average particle sizes of CL-20 in CL-20/BAMO-THF energetic nanocomposites were decreased to nano scale and the morphologies of CL-20 were also changed from prismatic to spherical. FT-IR detection revealed that CL-20 particles were recrystallized in BAMO-THF gel matrix during the freezing-drying process. The thermal decomposition behaviors of the energetic nanocomposites were investigated as well. The thermolysis process of CL-20/BAMO-THF nanocomposites was enhanced and the activation energy was lower compared with that of raw CL-20, indicating that CL-20/BAMO-THF nanocomposites showed high thermolysis activity. The impact sensitivity tests indicated that CL-20/BAMO-THF energetic nanocomposites presented low sensitivity performance.
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PLoS One
·
2017
·Vol. 12
·期 5
·e0178226
·
IF 2.806
Peng-Xiao Chen,Yi-Lin Zhang,Jia-Wen Xu,Ming-Hao Yu,Jie-Hong Huang,Lei Zhao,Wen-Liang Zhou
Sodium tanshinone IIA sulfonate (STS) is a derivate of tanshinone IIA, a lipophilic compound in Salvia miltiorrhiza . This study aimed to investigate the effect of STS on ion transport in mouse tracheal epithelium and the mechanisms underlying it. Short-circuit current ( I sc ) was measured to evaluate the effect of STS on transepithelial ion transport. Intracellular Ca 2+ imaging was performed to observe intracellular Ca 2+ concentration ([Ca 2+ ] i ) changes induced by STS in primary cultured mouse tracheal epithelial cells. Results showed that the apical application of STS at mouse trachea elicited an increase of I sc , which was abrogated by atropine, an antagonist of muscarinic acetylcholine receptor (mAChR). By removing ambient Cl − or applying blockers of Ca 2+ -activated Cl − channel (CaCC), the response of STS-induced I sc was suppressed. Moreover, STS elevated the [Ca 2+ ] i in mouse tracheal epithelial cells. As a result, STS stimulated Cl − secretion in mouse tracheal epithelium via CaCC in an mAChR-dependent way. Due to the critical role of Cl − secretion in airway hydration, our findings suggested that STS may be used to ameliorate the airway dehydration symptom in cystic fibrosis (CF) and chronic obstructive pulmonary disease (COPD).
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PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
You Xiujia,Zhang Hanmin,Lin Hongjun,Rao Linhua
Gel fouling is a major rate-limiting factor for forward osmosis (FO) dewatering of waste activated sludge (WAS). This study proposes a novel FO system, assisted by in-situ ultraviolet/electrooxidation (UV/E-Cl) driven by dynamic reverse chloride ions (Cl − ), for simultaneous WAS conditioning and dewatering. Superior filtration performances were achieved, with water flux reaching 614% of the control and filtration resistance reduced by orders of magnitude, primarily due to the targeted attack on protein and polysaccharide fractions within extracellular polymeric substances (EPS). Density functional theory (DFT) simulations identified that protein-polysaccharide interactions prefer a specific linear configuration, driving cross-linked network formation. Interfacial thermodynamics demonstrated that UV/E-Cl decreased foulant adhesion energy on the membrane surface by 97.51% through cleaving cross-links. Crucially, this work provides the quantitative thermodynamic evidence that shifts in water occurrence states surrounding network pores from bound to free water dominate gel fouling mitigation, with chemical potential variation accounting for 90.71% of filtration resistance.
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高影响因子
MATERIALS LETTERS
·
2024
·
IF 2.7
Ying Chen,Minghao Li,Jing Huang,Hui Zeng,Linhua Xu,Jing Su
This paper presents the growth of large-sized CsCu(Br, Cl) 3 crystals using the aqueous solution evaporation method. The structure and the components of the crystals were analyzed. It was found that CsCuBr 3 is a direct bandgap material, while CsCuCl 3 is an indirect bandgap material, and the band gap of CsCu(Br, Cl) 3 halides can be adjusted in the range of 2.63–3.63 eV (PBE) by changing the ratio of Br - /Cl - . Besides CsCuCl 3, which has an absorption valley at 654 nm, the other CsCu(Br, Cl) 3 crystals show high absorption in the range of 200–1000 nm. Under UV excitation, the PL spectra show that CsCu(Br, Cl) 3 crystals exhibit red and blue emission.
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