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 − .
研究领域:
环境科学
·
化学工程
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DOI
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.
研究领域:
材料科学
·
光学
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DOI
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.
研究领域:
材料科学
·
光学材料
·
非线性光学
·
固态化学
·
晶体设计
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DOI
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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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.
研究领域:
热力学
·
制冷与空调
·
化学工程
·
离子液体应用
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DOI
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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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Mengmeng Feng,Huifang Ge,Ting Zhang,Jingbo Liu,Boqun Liu,Yali Yu
The quantification and analysis of free amino acids (FAAs) in serum is important for illness diagnosis due to its content varies with the body’s condition. In this study, a new sensitive analytical method based on liquid chromatography electrospray ionization mass spectrometry (LC-ESI-MS/MS) was optimized for simple and rapid simultaneous detection of 20 amino acids by pre-column derivatization. Amino acid derivatized by 9-fluorenyl methyl chloroformate (FMOC-Cl) were eluted and separated by simple mobile phase reagent in 20 min via gradient elution using a traditional reverse phase C18 column (150 × 4.6 mm, 5 μm), at the flow rate of 0.8 mL/min. After optimizing derivatization, LC-MS/MS conditions, and sample pre-treatment, this method was verified with LODs and LOQs ranging from 0.0237 to 0.2391 ng/mL and 0.079 to 0.7971 ng/mL. The intra- and inter-day precision was no more than 10 %. The overall accuracy and recovery varied from 88.4-111 % and 88.7–114 %, respectively. Those methods were first applied to mice serum with ulcerative colitis. The results showed that the levels of Ala, Arg, Trp, Lys, Cys, Tyr, and Phe significantly increased in pre-treated group by egg white peptides, which will participate in metabolism. This study provides a valuable reference for further research on the pathogenesis of ulcerous colitis and the development of functional foods to relieve inflammation and balance metabolism.
研究领域:
分析化学
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医学
·
营养学
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DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Hongqi Nie,Ruixuan Xu,Xin Li,Yuruizhi Lin,Suhang Chen,Kangzhen Xu,Jia-Rong Zhang,Qi-Long Yan
The combustion characteristics and energy output properties of solid propellants play a decisive role in rocket engine and propulsion system performance. Particularly for HTPB propellant systems incorporating CL-20 as the high-energy oxidizer, achieving wide-range burn rate regulation and maintaining low pressure exponents constitute fundamental requirements for practical implementation. Through advanced interfacial control methodology, this study successfully constructed two types of aluminum/oxidizer integrated composites (Al@AP and Al@CL-20), while employing precise catalysis to accurately distribute C 3 N 4 burn rate modifiers within the target oxidizer. This innovative approach has demonstrated significant enhancement in aluminum combustion efficiency within the composite propellant system. The strategic incorporation of C 3 N 4 , coupled with the optimized interfacial architecture between fuel and oxidizer components, establishes a new paradigm for performance modulation in solid propellant formulations. Thermal analysis (DSC/TGA) results reveal that both Al@AP/CN and Al@CL-20/CN composites exhibit concentrated exothermic characteristics, yet demonstrate fundamentally distinct heat release profiles. By strategically exploiting these differential energy release features, propellant formulations with tailored interfacial compositions and precisely engineered catalytic sites were developed. The modified propellants displayed markedly different combustion behaviors: the Al@CL-20/CN-based formulation achieved a 33% reduction in pressure exponent ( n =0.18) with significantly enhanced low-pressure burning rates, while the Al@AP/CN-modified system maintained ultra-low burning rates (<5 mm·s -1 ) but with high combustion efficiency across broad pressure ranges with an exceptionally low pressure exponent of 0.23. Complementary analysis of condensed combustion products (CCPs) confirmed substantial improvements in combustion completeness, showing a 78% reduction in micron-sized aluminum agglomerates and significantly refined CCPs particle size distribution. These findings collectively demonstrate that the synergistic combination of interfacial modification and precision catalysis effectively optimizes aluminum combustion efficiency and tunability of burn rate of high-energy HTPB propellants.
研究领域:
航空航天工程
·
推进系统
·
材料科学
·
含能材料
·
燃烧化学
✓ 已验证
产品关联
DOI
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.
研究领域:
环境工程
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
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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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
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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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）