Matter
·
2024
·
IF 17.3
Pei Li,Shuo Yang,Jiaxiong Zhu,Shengnan Wang,Yue Hou,Huilin Cui,Ze Chen,Rong Zhang,Zhuoxi Wu,Yiqiao Wang,Zhiquan Wei,Xinghui Liu,Shaoce Zhang,Xinliang Li,Chunyi Zhi
Chlorine-based electrochemical energy storage is a promising candidate for sustainable battery technology. The anionic redox reaction of Cl 0/−1 is of interest due to its superior redox potential (1.36 V vs . standard hydrogen electrode [SHE]), capacity (756 mAh g −1 ), high power, and low cost. Although Cl chemistry has been used in aqueous batteries for a long time, its deployment in organic lithium batteries has been significantly impeded due to the insolubility of Cl − ions (<0.1 M). Scarce oxidizable Cl − blocks redox reactions and the inevitable lithium chloride (LiCl) film passivates electrodes on discharge. We report a eutectic effect to improve the Cl − solubility in organic electrolytes (2 M or higher) by mixing a series of N-/P-centered chloride salts with lithium bis(trifluoromethanesulfonyl)imide at specific ratios. Based on an optimized Cl − concentration, a Li-Cl 2 cell using I as a chemical fixation can achieve a three-electron transfer with a specific capacity of 702 mAh g −1 and an energy density of 1,116 Wh kg −1 .
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OPTICAL MATERIALS
·
2024
·
IF 3.8
Lin Chen,Xiong Shen,Jinhe Wei,Zhongming Wang,Fei Hu,Limin Bian,Qiuyun Ouyang
CsPb(Cl/Br) 3 perovskite nanocrystals (NCs) materials were synthesized by a hot injection method. To enhance the stability of the perovskite , CsPb(Cl/Br) 3 - multiwalled carbon nanotubes (CNTs) composites were synthesized by the insitu growth method. First, the successful composite of CNTs and perovskite has been proved by X-ray photoelectron spectroscopy (XPS). After CsPb(Cl/Br) 3 NCs have grew on CNTs, the exciton lifetime decays from 8.2 ns to 4.5 ns, suggesting the presence of an additional electron transfer pathway between CNTs and CsPb(Cl/Br) 3 NCs. The photoluminescence (PL) properties of perovskite NCs and CsPb(Cl/Br) 3 -CNTs were evaluated using temperature-dependent PL spectroscopy . The exciton binding energy of the CsPb(Cl/Br) 3 -CNTs composites (59.28 meV) is higher than that of the CsPb(Cl/Br) 3 NCs (51.79 meV), indicating a more stable exciton state within the CsPb(Cl/Br) 3 -CNTs structure. The PL stability experimental results reveal a notable enhancement in the stability of CsPb(Cl/Br) 3 -CNTs composites compared to CsPb(Cl/Br) 3 NCs. In addition, electrochemical tests of CsPb(Cl/Br) 3 -CNTs show a low resistance to charge transfer ( R ct ) alongside a favorable photocurrent response. This work has proved that the novel CsPb(Cl/Br) 3 -CNTs composites not only exhibit outstanding moisture and UV resistance but also demonstrate remarkable potential optoelectronic device applications.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Honglin Xu,Ruilin Wang,Yongsheng Deng,Guofeng Dou,Xinyu Wang
The stable phase equilibrium of the reciprocal quaternary system of Na+, K+//VO3–, Cl––H2O at 298.15 K was investigated by an isothermal solution equilibrium method. The equilibrium liquid phase solubility data and physical property data [density (ρ), refractive index (nD), and pH] were determined, and the composition of the equilibrium solid phase was verified by X-ray diffraction. The phase diagram and physical property–composition diagrams were constructed based on the equilibrium solubility data and physical property data. The phase diagram contains three invariant points, seven isothermal univariant curves, and five crystalline phase regions. The study found that this quaternary system belongs to a complex system with the presence of the double salts. By comparing the experimental results with literature data, it was confirmed that at 298.15 K, the chemical formulas of the complex salt which formed by the quaternary system Na+, K+//VO3–, Cl––H2O were consistent with the complex salt chemical formula (Na2mKn(VO3)2m+n) proposed by the Druzynski group, thus verifying the reliability of this experiment. The results of this study will provide new experimental data for the thermodynamics of vanadium–water systems.
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COMBUSTION AND FLAME
·
2025
·
IF 6.2
Shubao Song,Lin Zhang,Meishuai Zou,Jiankun Shao
High-temperature gas-phase interactions between chlorine- and nitrogen-bearing species relevant to ammonium-perchlorate (AP) propellant combustion were elucidated by coupling shock-tube laser-absorption measurements with a detailed kinetic model. Time-resolved HCl concentration profiles were obtained for four argon-diluted surrogates—0.3 % NH 3 /0.3 % CCl 4 , 0.5 % NH 3 /0.3 % CCl 4 , 0.2 % NH 3 /0.2 % CCl 4 /0.2 % CH 4 , and 0.2 % NH 3 /0.2 % CCl 4 /0.2 % H 2 —over 1158–1506 K at near-atmospheric pressure. A kinetic model consisting of 164 species and 1358 reactions, assembled from state-of-the-art CCl 4 , H–Cl–O, NH 3 /C 0 –C 2 , and N–Cl sub-models, reproduced the new HCl data alongside literature ignition-delay and speciation measurements with excellent accuracy. Sensitivity and rate-of-production analyses reveal a temperature-robust control structure in which HCl forms almost entirely through Cl-atom abstraction from NH 3 , with Cl supplied by rapid CCl 4 dissociation; the barrierless Cl + H<=>HCl path dominates in H 2 -containing mixtures, whereas competition from Cl + CH 4 <=>CH 3 + HCl moderates HCl growth and channels carbon–nitrogen flux toward toxic HCN when CH 4 is present. Elevated temperature chiefly amplifies Cl production and suppresses NH 2 recombination, accelerating overall reactivity without altering the dominant pathways. The resulting benchmark HCl time-histories and rigorously validated model advance fundamental understanding of chlorine–nitrogen combustion chemistry and provide quantitative guidance for formulating halogenated energetic materials that maximise performance while limiting hazardous by-product formation. Importantly, the mechanism developed here may serve as a transferable gas-phase sub-model for future integration into comprehensive AP combustion frameworks, enabling more predictive simulations of real propellant systems.
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TALANTA
·
2025
·
IF 6.1
Liwu Gan,Xiaoying Feng,Suxin Zhou,Jinglin Chen,Juan Zheng,Gangfeng Ouyang
Functionalized metal organic framework (MOF) and covalent organic framework (COF) composites (MOF@COFs) with complementary advantages, hierarchical pores, pre-designable and tunable structures, are expected for remarkable adsorption of organic pollutants, yet to be explored. Herein, a kind of MOF@COF composite was synthesized by combining the parent MIL-68(In) and COF–V (10 %-MIL-68@COF–V), characterized with well-retained crystallinity and hierarchical pores. The parent materials and as-prepared MIL-68@COF-Vs were further fabricated as solid phase microextraction (SPME) coatings to study their extraction performance for Cl/Br-substituted organic pollutants. The 10 %-MIL-68@COF–V coated fiber exhibited the most outstanding enrichment performance for Cl/Br-substituted organic pollutants mainly due to the synthetic advantages, which was 1.1–196.5 times superior than that of the commercial PDMS coating. By combining it with gas chromatography-mass spectrometry (GC-MS), an ultrasensitive method was established, exhibiting wide linear ranges (1–5000 ng L −1 ), low LODs (0.17–0.29 ng L −1 ), and good reproducibility. The trace Cl/Br-substituted organic pollutants in marine water samples were successfully detected, verifying the practicability of the developed method in environmental monitoring.
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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.
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Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 11
·3319-3325
·
IF 7
Jing-Li Qi,Jiajing Wu,Yue Guo,Zhong-Ping Xu,Wenlong Liu,Sheng-Ping Guo
The emerging organic–inorganic hybrid metal halides feature unique optical and electronic properties, are easily grown and have flexible crystal structures, making them a class of promising next-generation nonlinear optical (NLO) and ferroelectric materials. Herein, we successfully synthesized two centimeter-level zero-dimensional copper halide organic–inorganic hybrids (C20H20P)CuX2 (X = Cl, Br) that are crystallized in the monoclinic noncentrosymmetric P21 space group. Their structures contain rare quasi-linear [CuX2]– anions and [C20H20P]+ cations. (C20H20P)CuCl2 and (C20H20P)CuBr2 crystals show phase-matchable NLO effects around 1.1 and 0.87 times that of benchmark KDP, respectively. These (C20H20P)CuX2 materials are the first NLO-active examples in the hybrid copper(I) halide family containing a quasi-linear CuX2 unit.
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Xiao Yu,Banghong Deng,Lixia Yang,Moliang Zou,Zhenglin Chen,Yixuan Fan,Zhihui Wei,Kai Chen,Mingxia Lu,Tiantian Ying,Jie Zhang,Weili Dai
Mn 2 O 3 is a conventional catalyst that is applied in photothermal catalytic oxidation of toluene while regular anions like SO 4 2- , Cl - , and NO 3 - from different Mn precursors are left in Mn 2 O 3 . When applied in toluene degradation, the declining activity of Mn 2 O 3 is always observable because the residual anions block the Mn 4+ /Mn 3+ active sites, shield the oxygen vacancies, and cube the production of active oxygen species (O 2 - , O - ). Herein, it is found that the residual SO 4 2- , Cl - , and NO 3 - make Mn 2 O 3 incapacitated in deeply oxidizing the intermediates and cutting off the reaction process, and their influence ranks in the order of SO 4 2- >Cl - >NO 3 - . Compared with pristine Mn 2 O 3 , the drops in CO 2 conversion efficiency account for 11 %, 60 %, and 73 %, respectively. Nevertheless, rinsing with water is an effective method to remove the residual anions, and the more the rinsing, the better the toluene mineralization degree. This work provides a profound cognition of the deactivation mechanism of SO 4 2- , Cl - , and NO 3 - and points out an effective way to abate their negative effect for the first time.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Zhifan Wang,Mengmeng Dai,Gang Yang,Xiao Zhang,Pengchao Shen,Chunxiang Zhao,Yongsheng Zhu
Perovskite nanocrystals have gained considerable attention owing to their outstanding photoluminescence and photodetection performance in various applications. However, the rigorous preparation conditions and lead toxicity of most lead halide perovskite nanocrystals still hamper practical application, which achieves efficient deep-red and near-infrared (NIR) emission also meeting the challenge. Herein, sub-25 nm Cl–-doped lead-free CsMnBr3 nanocrystals (NCs) were prepared via a moderate hot-injection method at room temperature and the resulting NCs showcased excellent photoluminescence property with reduced impurities. Furthermore, a substantial enhancement in photoluminescence quantum yield (PLQY) from 54.20% to 78.05% was achieved by manipulating the Cl– doping concentration, which is attributed to the weakened nonradiative recombination pathways induced by Cl–-mediated defect passivation. Consequently, we fabricated photoluminescent light-emitting diodes (LEDs) based on Cl–-doped CsMnBr3 nanocrystals and achieved NIR emissions of Nd3+, Yb3+, and Er3+ ions. These results reveal that Cl–-doped CsMnBr3 perovskites NCs can not only be facilely prepared via a simple room-temperature synthesis, but also demonstrate promising potential in various areas such as photoluminescent LEDs and near-infrared optoelectronic devices.
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Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 11
·3133-3139
·
IF 5.934
Ya-Ping Gong,Chun-Li Hu,Yun-Xiang Ma,Jiang-Gao Mao,Fang Kong
Two new halogenated selenites, namely, Pb2Cd(SeO3)2X2 (X = Cl and Br), were synthesized via mild hydrothermal reactions. The isomorphic compounds crystallized in a noncentrosymmetric (NCS) and chiral space group. Their three-dimensional (3D) structures were formed by alternating undulated [Pb2(SeO3)X]∞+ cationic layers and flattened [Cd(SeO3)X]∞− anionic layers. Thermal analyses revealed that the compounds can remain stable up to 500 °C. The SHG efficiencies of Pb2Cd(SeO3)2X2 (X = Cl and Br) are much higher than those of commercial KDP (KH2PO4), and they are phase-matchable. UV-vis-NIR diffuse reflectance spectra revealed that the two compounds exhibited wide optical band gaps. The laser damage thresholds of Pb2Cd(SeO3)2X2 (X = Cl and Br) were measured to be about 38.5 and 35.7 times higher than that of AGS (AgGaS2). Their calculated birefringences were large enough to accomplish phase matching in SHG progression. The SHG density analyses disclosed that the lone pair electrons of the SeO3 and PbOnXm units made major contributions to their nonlinear efficiencies.
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Journal of Energy Storage
·
2024
·
IF 8.9
Yi Duan,Xiaopeng Qi,Xiangtao Bai,Tianwei Yu,Yanlong Wu,Zenghua Chang,Jiantao Wang
Argyrodite Li 6-x PS 5-x Cl 1+x with high ionic conductivity and excellent mechanical performance is an attractive solid electrolyte candidate for all-solid-state lithium batteries (ASSLBs). Adjusting Cl content is an effective strategy to enhance the ionic conductivity, however its effect on the thermal stability remain uncovered. Herein, our study shows that the increase of Cl content in Li 6-x PS 5-x Cl 1+x significantly enhances the ionic conductivity and electrochemical properties but significantly reduces its thermal stability. We reveal that the thermal stability of Li 6-x PS 5-x Cl 1+x is heavily dependent on its Cl content and can be significantly enhanced by elemental doping. LiNi 0.6 Co 0.2 Mn 0.2 O 2 based ASSLBs using Cl-rich argyrodite with pure phase shows better cycle performance. Achievements from this study could serve as a guidance for optimizing and applicating argyrodite solid electrolytes towards high-performance and safe ASSLBs.
研究领域:
材料科学
·
电化学
·
能源存储
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ACS Applied Nano Materials
·
2021
·
IF 5.097
Muhammad Amin Padhiar,Minqiang Wang,Yongqiang Ji,Zhi Yang,Yun Zhou,Hengwei Qiu,Hao Wang,Azaz Ali Shah,Arshad Saleem Bhatti
Perovskite nanocrystals (PNCs) are ideal for optical devices due to their adjustable emission band and high photoluminescence. However, blue light-emitting perovskite nanocrystals (PNCs) exhibit poor performance compared to their green and red-emitting PNC counterparts. Herein, we introduce a simple strategy for increasing the stability of blue light-emitting CsPb (Br/Cl)3 PNCs passivated with an Al-doped CdSe layer. This simple strategy successfully achieves highly stable PNCs with photoluminescence (PL) emission ranging from 454 to 460 nm with a full width at half-maximum (FWHM) ranging from 18 to 22 nm; changes in bandgaps are also observed, and the corresponding PLQY values show a significant change after CdSe/Al modification. In addition, CsPb (Br/Cl)3 PNCs with a CdSe layer doped with Al formed on the surface show remarkable stability under ambient conditions, including thermal exposure, water resistance, and ultraviolet (UV) irradiation. A light-emitting diode (LED) device was constructed to demonstrate the feasibility of the approach by combining the optimal CsPb(Br/Cl)3/CdSe/Al PNCs with an existing commercial 365 nm UV chip, resulting in bright blue light emission with CIE color coordinates of (0.16, 0.09). All of the findings suggest that doped CsPb (Br/Cl)3/CdSe/Al PNCs have the potential to be used as color converters in liquid crystal displays (LCDs).
研究领域:
材料科学
·
光学工程
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