FirePhysChem
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2026
·
IF 3.6
Handong Shi,Shijiao Li,Chuanhao Xu,Kai Han,Fan Liao,Yanpeng Lv,Guoqiang He,Wenxuan Liang,Chongwei An
This work presents a molecular-to-structural strategy for fabricating high-performance CL-20-based composite energetic materials using direct ink writing (DIW). A poly(vinyl alcohol)/poly(acrylic acid)/modified potassium titanate whisker (PVA/PAA/ M-PTW) interpenetrating polymer network (IPN) was designed to simultaneously enhance mechanical strength and reduce mechanical sensitivity. The hydrogen bonding–covalent crosslinking–filler reinforcement mechanism ensured uniform dispersion of CL-20 crystals and strong interfacial adhesion within the polymer matrix. Surface modification of PTW with 5 wt% KH-550 improved compatibility with the IPN, yielding printed structures with excellent form accuracy and adhesion to aluminum substrates (0.961 MPa). The optimized composite exhibited high compressive strength (16.77 MPa) and reduced impact and friction sensitivities compared with ε-CL-20 and submicron CL-20 samples. It achieved stable detonation wave transmission within a 90°-160° corner range in a 1.2 × 1.2mm charge slot, with the critical detonation size reaching 0.3m × 0.3mm. The measured detonation velocity of 7267.9m/s (83.2% of theoretical). These results demonstrate that the DIW-based PVA/PAA/M-PTW system enables the precise construction of high-strength, low-sensitivity energetic composites with reliable detonation performance, providing a promising pathway for advanced micro-scale energetic devices.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Kaijie Pei,Hang Lyu,Ai-Bo Jia,Rong Zhong,Chuping Chang,Xiaosi Su
Ammonium in groundwater hampers sustainable water use, calling for efficient, stable in-situ remediation technologies. In this study, we design a novel coated sustained-release candle (CSRC) that contains peroxymonosulfate (PMS) and chloride ions (Cl − ). The aim is to construct an in situ long-acting SO 4 • − –Cl − oxidation system for groundwater ammonium removal. The outer coating effectively addressed the issue of “burst release” of paraffin-based sustained-release materials during the initial release stage. It also prolonged the effective release period and guaranteed the synchronous PMS and Cl − release. Systematic static release experiments revealed the critical roles of the CSRC diameter and reagent-to-paraffin mass ratio in regulating the release profiles. Column experiments demonstrated that CSRC deployment within an injection well significantly enhanced the reagent release compared to direct embedding. In addition, the groundwater flow rate exerted no influence on the CSRC release. The long-term operation confirmed the sustained generation of Cl•/ClO• and effective ammonium removal along the flow path. Moreover, three-dimensional tank experiments under varying hydraulic gradients and screen lengths showed that increases in the hydrodynamic conditions and well-screen length markedly improved the radial penetration and vertical dispersion of reagents in the aquifer and enabled the effective ammonium removal for up to 56 days. Collectively, this work presents a feasible and engineered strategy by adjusting the reagents ratio, diameter, and CSRC length that achieves the stable, long-term in-situ chemical oxidation of ammonium in groundwater. This work offers theoretical insights and practical guidance for applying sustained-release material-based remediation systems in the field.
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DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 12
·4728-4733
·
IF 4.569
Chunlan Tang,Wenhao Xing,Naizheng Wang,Jian Tang,Zheshuai Lin,Jieyun Wu,Wenlong Yin,Bin Kang
Inorganic metal chalcohalides are significant semiconductive materials for photovoltaics, photodetetion and infrared optics. Thus it is considerably rewarding to develop a new synthetic strategy to provide more degrees of freedom for atomic coordination to tune the optical and electronic properties of metal chalcohalides. In this work, the mixed-anion strategy is performed to synthesize two new metal chalcohalides Cs2InPS4X2 (X = Cl, Br) with mixed-anion structure by the reaction of InPS4 and CsX. Single-crystal X-ray diffraction analysis shows that they are isostructural and crystallize in the centrosymmetric space group P21/n, consisting of zero-dimensional structure [In2P2S8X4]4− (X = Cl, Br) built from tetrahedral [PS4]3− and octahedral [InS4X2]7− (X = Cl, Br) through edge-sharing, with Cs cations filling in intervening voids. The UV-vis-NIR diffuse reflectance spectroscopy measurement reveals that Cs2InPS4Cl2 and Cs2InPS4Br2 exhibit large optical bandgaps of 3.21 eV and 3.12 eV, respectively. The electronic structure calculations show that the bandgap mainly originates from the [InS4X2]7− (X = Cl, Br) mixed-anion groups. First-principles calculations indicate that the birefringence of Cs2InPS4Cl2 and Cs2InPS4Br2 is ∼0.08 and ∼0.05 at 2090 nm, respectively. Furthermore, thermal analysis reveals that the Cs2InPS4X2 (X = Cl, Br) are thermostable up to 400 °C. This discovery enriches the structural diversity of inorganic chalcohalides and provides an insight for the exploration of new semiconductive materials.
研究领域:
无机化学
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材料科学
·
半导体物理
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晶体工程
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红外光学
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International Journal of Electrochemical Science
·
2023
·Vol. 14
·期 1
·75-90
·
IF 1.5
Bilan Lin,Yuye Xu
To improve the corrosion resistance of fine-grain high-strength (FGHS) reinforcement, molybdate was investigated as a inhibitor. The influence of molybdate on the corrosion behavior of FGHS reinforcement in simulated concrete pore (SCP) solutions containing 1.0% or 3.5% NaCl was evaluated using polarization, electrochemical impedance spectroscopy, and Mott-Schottky curves. The corrosion products were analyzed using scanning electron microscopy and energy-dispersive X-ray spectroscopy. The results revealed that upon increasing the molybdate content, the corrosion current density ( i corr ) and donor density initially rapidly decreased and then slightly increased, while the corrosion protection efficiency and impedance first rapidly increased and then slightly decreased. The optimum molybdate was 1.0 g/L. The i corr of the former (0.058 μA cm -2 ) was considerably less than that of the latter (0.250 μA cm -2 ). The Mott-Schottky curves for the former were continuous, whereas some of those for the latter were discontinuous owing to the depletion of a less Fe 3+ in the corrosion product. Almost no pits on the reinforcement were observed for the former, whereas a few pits were still observed for the latter. Molybdate exhibited good corrosion inhibition of FGHS reinforcement at low chloride concentrations, although other or composite inhibitors should be considered for high chloride concentrations.
研究领域:
材料科学
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腐蚀工程
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土木工程
·
电化学
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Qing Hao,Huan Zhou,Jing Yu Chang,Jie Li,Yun Zhao
Brine deposited in Chaerhan salt lake belongs to the chloride type and can be simplified into the hexnary system Li+, Na+, K+, Mg2+, Ca2+, Cl––H2O. The known solubility data indicate that significant salting-in effects exist in its subsystems of KCl–LiCl–H2O and KCl–CaCl2–H2O, which inevitably affect the properties and solubility behavior of actual brine. In this work, the solubility behavior study and phase diagram determination are extended to the quaternary system of Li+, K+, and Ca2+∥Cl––H2O. The phase equilibrium data at 298.15 and 273.15 K are reported, and five solid species, including two double salts KCl·CaCl2 and LiCl·CaCl2·5H2O, are found. The salting-in effect is still exhibited in the Li+, K+, and Ca2+∥Cl––H2O system and results in a very high total salt content at invariant points; e.g., they are 59.08 and 46.93% at 298.15 and 273.15 K, respectively.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Chang Du,Shuai Ma,Meiying Xie,Fan Yang,Zhigang Zhao,Yun Chen,Ying Ma
This paper proposes a new integrated method for recycling permanent magnet waste by betaine hydrochloride ([Hbet]Cl) solution extraction. The orthogonal experiment method was used to analyze four factors in the leaching process to explore the primary and secondary factors influencing the leaching results. The following optimum leaching conditions were obtained: leaching temperature of 200 ℃, leaching time of 8 h, lixiviant [Hbet]Cl concentration of 0.2 mol/L, and solid–liquid ratio of 1:150 g/ml. These conditions yielded the optimum leaching results of 99.81 % Pr, 97.05 % Nd, 95.51 % Gd, 56.24 % Ce and 0.20 % Fe, and almost all iron oxide remained in the residue. Compared with the results for common lixiviants, the proposed method showed a better leaching rate and selectivity, and the leaching sequence was in line with established chemical properties. The method is characterized by a high recovery rate, strong selectivity, environmental friendliness and low cost. The leaching mechanism was analyzed, and the crystal lattice energy U values of ionic crystal decomposition were calculated to explain the dissolution sequence and solubility difference of metal oxides, laying a foundation for the recovery process.
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INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Qiang Huang,Changqing Tian,Junan Lai,Fei Qi,Nan Zhang,Jiaxin Liu,Zhiyu Liang,Daofu Wu,Xiaosheng Tang
In response to calling for a sustainable and carbon-neutral economy, the conversion of CO2 to useful chemicals using the solar energy is a potential tactic to relieve the global energy dilemma and environmental issues, which has been a hot topic so far. Recently, the lead halide perovskites as novel photocatalysts have attracted researchers’ interests. However, they generally encounter poor stability and lead toxicity, restricting their large-scale practical applications. Here, the lead-free Cs2TeX6 (X = Cl, Cl0.5Br0.5, Br, Br0.5I0.5, and I) perovskite microcrystals with strong stability were prepared and used to realize the CO2 photocatalytic reduction efficiently. The prepared Cs2TeBr6 microcrystals delivered stronger photocatalytic ability than many previously reported photocatalysts, with the CO and CH4 yields of 308.63 and 60.42 μmolg–1, respectively, under 3 h of illumination. The presented strategy in our work provides new ideas of designing and preparing efficient and practical CO2 reduction photocatalysts based on nonleaded and high-stability halide perovskites.
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Nanomaterials
·
2022
·Vol. 12
·期 12
·2026
·
IF 5.719
Weizhuo Zhang,Xin Li,Chencheng Peng,Fei Yang,Linyuan Lian,Runda Guo,Jianbing Zhang,Lei Wang
Colloidal cesium lead halide (CsPbX3, X = Cl, Br, and I) perovskite nanocrystals (NCs) demonstrate supreme optical properties in the spectra region of infrared, red, and green. High-performance blue-emitting counterparts are still eagerly required for next-generation full-color displays. However, it is challenging to obtain efficient blue perovskite NCs, especially in a deep blue region with an emission wavelength of around 460 nm or shorter. Herein, calcium halide and ammonium ions are applied simultaneously to modify the CsPb(Br/Cl)3NCs in situ to reduce surface defects, finally remarkably enhancing the photoluminescence quantum yield (PLQY) from 13% to 93% with an emission peak at 455 nm and the Commission Internationale de l’Eclairage (CIE) coordinates at (0.147, 0.030), which is close to the requirement of the Rec.2020 standard and also meets the requirement of blue emission in DCI-P3. Bright white emission and a wide color gamut are also achieved by combining the commercial red-emitting and green-emitting phosphors. The combination of time-resolved PL spectra and femtosecond transient absorption results discloses the reason for PLQY improvement as suppressing the nonradiative recombination.Keywords:CsPb(Br/Cl)3nanocrystals;surface passivation;blue emission;ammonium ion;calcium
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Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 18
·4705-4713
·
IF 7.779
Ting Zheng,Qiang Wang,JinXuan Ren,Liling Cao,Ling Huang,Daojiang Gao,Jian Bi,Guohong Zou
Generally, phosphates are employed to design ultraviolet nonlinear optical crystals. However, phosphates always suffer from too small birefringence to effectively achieve phase matching. Herein, the Sn2+ cation with a stereochemically active lone pair was introduced into a phosphate as a birefringence-active unit, and two tin phosphate halides Sn2PO4X (X = F, Cl) were successfully synthesized. Interestingly, the different coordination environments of the Sn-polyhedron caused by the partial substitution of halide ions (F−/Cl−) with different ionic radii for the oxygen ligands lead to structural transformation from centrosymmetric (CS) Sn2PO4F to noncentrosymmetric (NCS) Sn2PO4Cl. Thus, Sn2PO4X (X = F, Cl) were characterized by enlarged birefringence, and Sn2PO4Cl is type I phase-matchable with a moderate SHG response, and is a potential ultraviolet nonlinear optical material. Furthermore, both phosphates show wide band gaps. Theoretical analysis confirmed that their excellent optical properties result from the synergistic effect of the [SnOX] (X = F, Cl) polyhedra with stereochemically active lone pairs and the [PO4]3− tetrahedron.
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ACS Applied Nano Materials
·
2022
·
IF 6.14
Dayong He,Chao Wang,Rui Zhao,Xiaofeng Lu,Mei Yang,Ju Qiu,Kaizhong Wang,Ce Wang
Facing high-energy radiation exposure in many different situations, researchers are focused on developing personal protective equipment against high-energy rays. The design and fabrication of low-density, self-standing, nontoxic, and flexible high-energy ray shielding materials have always been a hot issue in the special equipment manufacturing industry. As key raw materials for high-efficiency X-ray shielding, high-Z element compounds are nonrenewable resources. Therefore, their development and application require far-sighted arrangement. In this work, we demonstrate an easy and general fabrication route of multifunctional high-Z element compounds/polymer nanofibrous membranes through electrospinning and subsequent solvothermal and successive ionic layer adsorption and reaction processes. The as-fabricated BiOX (X = Cl, Br, I)/WO3/PAN nanofibrous membrane exhibits an excellent X-ray shielding capability with a mass attenuation coefficient of 3.55 cm2 g–1 at 83 keV and could achieve a balanced shielding performance by the introduction of inexpensive iodine elements. Additionally, the self-standing hybrid nanofibrous membrane also exhibits remarkable visible-light photocatalytic activities to degrade RhB in aqueous solution, showing potential in water treatment application and providing an efficient and economical route for the development, usage, recycling, and reuse of precious high-Z material-based composites.
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Catalysis Science & Technology
·
2022
·Vol. 12
·期 6
·1968-1977
·
IF 6.177
Yiwen Yang,Haifeng Qi,Zhanwei Xu,Z. Conrad Zhang
In this work, we identified the prevailing catalytically active species evolved from paired PdCl2–CuCl2 in 1-butyl-3-methylimidazolium chloride ([BMim]Cl) that displayed dramatic synergy between the two metal chlorides in catalyzing the hydrolysis of β-1,4-glycosidic bonds in cellulose. Ultraviolet-visible (UV-vis), far infrared (FIR), and electron paramagnetic resonance (EPR) spectroscopy provide clear evidence for the prominent evolutionary pathways to form the catalytically active species. It is observed that the strong synergy between [PdIICl4]2− and [CuIICl4]2− is initiated by the presence of a saccharide. In the absence of a saccharide, the spectroscopic features of [PdIICl4]2− and [CuIICl4]2− in their paired solution show little change with respect to those of individual metal chloride solutions. The evolution of a highly active heterometallic PdII–Cl–CuI complex from paired PdCl2–CuCl2 in the presence of saccharides is revealed by the transition of the FIR absorption peak of PdII–Cl. Glycolaldehyde as the simplest model compound, which is the same as the reducing end group of saccharides, is applied to determine the possible catalytic species. X-ray absorption spectroscopy (XAS) verifies that [CuIICl4]2− is reduced to [CuICl3]2− by glycolaldehyde. The HCl generated from reduced [CuIICl4]2− is also found to contribute to the hydrolysis of cellobiose, serving as another catalytically active species in paired PdCl2–CuCl2/[BMim]Cl. Paired PdCl2–CuCl2 pretreated with glycolaldehyde exhibits dramatically higher activity than direct use of paired PdCl2–CuCl2 in cellobiose conversion. Strikingly, the PdII–Cl–CuI complex is found to be substantially more active than HCl in the hydrolysis of β-1,4-glycosidic bonds as evidenced by the sustained high cellobiose conversion after neutralization of HCl with NaOH.
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LANGMUIR
·
2023
·
IF 3.9
Fang Chen,Li Yin,Teng He,Tao Chen,Hangbo Yue,Chufen Yang
To enhance the stability of the polymeric micelles and optimize their drug-controlled release ability, three disulfide-linked polyethylene glycol methyl ether methacrylate–disulfide–poly(ε-caprolactone-co-γ-amine−ε-caprolactone) (PPEGMA-SS-P(CL-co-ACL)) polymers were synthesized and characterized by 1H NMR, GPC, and FT-IR successfully, and their dual pH/reduction-responsive cross-linked polymeric micelles were prepared for paclitaxel (PTX) delivery by using 2,3-dimethylmaleic anhydride (DMMA) as the cross-linking agent. The PTX loading capacity (LC) and encapsulation efficiency (EE) values of the cross-linked micelles formed by PPEGMA8-SS-P(CL47-co-ACL15) achieved were 23.96% and 71.58%, slightly higher than those of un-cross-linked micelles. Both particle sizes of blank micelles and in vitro drug release of PTX-loaded micelles confirmed that compared with those un-cross-linked micelles, the cross-linked micelles were more stable at pH 7.4 + 0 mM DTT, with a PTX cumulative release of 13% at 120 h, while the PTX cumulative release of the cross-linked micelles at pH 5.0 + 10 mM DTT were close to that of un-cross-linked micelles after 60 h, indicating the successful reversible cross-linking and smooth drug release of the cross-linked micelles. The cytotoxicity assay showed that PPEGMA8-SS-P(CL47-co-ACL15) and its cross-linked micelles had low cell cytotoxicity, and both PTX-loaded micelles revealed a certain inhibitory effect on HepG2 cells. These results revealed that the dual pH/reduction-responsive cross-linked polymeric micelles prepared from PPEGMA8-SS-P(CL47-co-DCL15) were a promising candidate for PTX delivery.
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