ACS Applied Materials & Interfaces
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2026
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IF 7.8
Linqing Wang,Huahui Zhao,Jun Li,Siyu Wang,Shi Zhou,Xiaoyi Chen,Jiali Liu,Li Yang,Hong Liu,Xianyou Wang
All-solid-state fluoride-ion batteries (ASSFIBs) integrate high theoretical energy density, high safety characteristics, and low manufacturing costs, making them a promising candidate for next-generation energy storage technologies. However, the intrinsic shortcomings of high-performance fluoride-ion solid electrolytes severely limit their practical application. Herein, a potassium/strontium dual-doping strategy is designed to synthesize the fluoride-ion conductor β-Pb0.88Sr0.08K0.04F1.96 with a fluorite structure via a straightforward solid-state reaction method. It has been found that KF doping can introduce abundant fluorine vacancy defects to effectively enhance vacancy concentration, while SrF2 and PbF2 can form a continuous solid solution that not only disperses fluorine vacancies generated by K+ doping and suppresses defect aggregation to significantly enhance phase stability, but also induces moderate lattice distortion through the incorporated Sr2+. Through reconfiguration of the local coordination environment of F–, the electrostatic interaction between F– and Pb2+ can be weakened, thereby reducing the ionic migration energy barrier. Owing to the higher vacancy concentration and lower migration barrier, the as-prepared material exhibits a high ionic conductivity of 4.77 × 10–4 S·cm–1 at room temperature, exceeding most reported fluoride ion conductors. ASSFIBs assembled with the fluoride ion conductor as the solid electrolyte present a discharge specific capacity of approximately 132.5 mAh·g–1 over 400 cycles and a capacity retention rate of 97.4%. Therefore, this work offers unique insights into the rational design of PbF2-based solid electrolytes featuring both high ionic conductivity and exceptional phase stability.
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JOURNAL OF RARE EARTHS
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2026
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IF 9.6
Zhichao Chen,Wenchao Wang,Hongzhi Wang,Licheng Liu
Electrocatalytic carbon dioxide reduction reaction (CO 2 RR) to produce value-added methane (CH 4 ) represents a promising approach to achieve carbon recycling and addressing global energy challenges. However, this reaction is currently hindered by limitations in catalytic selectivity and efficiency. Herein, we present a strategy involving strontium (Sr) doping at the A-site of La 2 CuO 4 perovskite (denoted as Sr x -LCO) to regulate surface basicity, thereby significantly enhancing catalytic performance for CO 2 RR toward CH 4 formation. The optimized Sr 0.04 -LCO catalyst achieves a Faradaic efficiency of 68.8% for CH 4 at −1.1 V (vs. RHE), which is significantly higher than that of undoped La 2 CuO 4 (44.1%) and at the top level among public reports. The results indicate that successful Sr doping to the La-site promotes electron transfer through the La−O−Cu linkage, generating a local alkaline microenvironment around the Sr−O sites. This microenvironment enhances CO 2 chemisorption and provides abundant reactive protons (*H). Theoretical calculations further confirm that the localized alkaline region reduces the activation energy barriers for the rate-determining steps (*CO 2 → *COOH and *CO → *COH) and suppresses the competing hydrogen evolution reaction (HER), thereby selectively steering the reaction pathway toward CH 4 formation. This study elucidates the mechanistic role of surface microenvironment modulation in enhancing CO 2 reduction reaction (CO 2 RR) selectivity for lanthanide perovskite, offering new insights for the rational design of high-performance electrocatalysts.
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Advanced Science
·
2022
·Vol. 10
·期 4
·2204755
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IF 17.521
Shaoxin Cui,Hongping Wu,Zhanggui Hu,Jiyang Wang,Yicheng Wu,Hongwei Yu
Oxychalcogenides capable of exhibiting excellent balance among large second-harmonic generation (SHG) response, wide band gap ( E g ), and suitable birefringence (Δ n ) are ideal materials class for infrared nonlinear optical (IR NLO) crystals. However, rationally designing a new high-performance oxychalcogenide IR NLO crystal still faces a huge challenge because it requires the optimal orientations of the heteroanionic groups in oxychalcogenide. Herein, a series of antiperovskite-type oxychalcogenides, Ae 3 Q[GeOQ 3 ] (Ae = Ba, Sr; Q = S, Se), which were synthesized by employing the antiperovskite-type Ba 3 S[GeS 4 ] as the structure template. Their structures feature novel three-dimensinoal frameworks constructed by distorted [QAe 6 ] octahedra, which are further filled by [GeOQ 3 ] tetrahedra to form antiperovskite-type structures. Based on the unique antiperovskite-type structures, the favorable alignment of the polarizable [GeOQ 3 ] tetrahedra and distorted [QAe 6 ] octahedra have been achieved. These contribute the ideal combination of large SHG response (0.7–1.5 times that of AgGaS 2 ), wide E g (3.52–4.10 eV), and appropriate Δ n (0.017–0.035) in Ae 3 Q[GeOQ 3 ]. Theoretical calculations and crystal structure analyses revealed that the strong SHG and wide E g could be attributed to the polarizable [GeOQ 3 ] tetrahedra and distorted [QAe 6 ] octahedra. This research provides a new exemplification for the design of high-performance IR NLO materials.
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JOURNAL OF LUMINESCENCE
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2022
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IF 4.171
Kaiming Zhu,Zhanglin Chen,Yuzhen Wang,Hui Liu,Yude Niu,Xin Yi,Yihuan Wang,Xuanyi Yuan,Guanghua Liu
Eu 2+ -doped CaAlSiN 3 ‐type structure nitrides have been extensively studied as a red-emitting phosphors in white light emitting diodes (w-LEDs), but there are few reports of systematic research on the effect of solid solution substitution on their long persistent luminescent properties. In this work, a series of (M,Ca)AlSiN 3 :Eu 2+ (M = Sr, Mg) phosphors have been successfully synthesized by efficient combustion synthesis . We investigated the effect of Sr and Mg solid solution on long persistent luminescent properties. Thermoluminescence (TL) measurements were performed in those persistent phosphors to obtain direct experimental results on the trap depth. The results show that the SrAlSiN 3 :0.2 at% Eu 2+ phosphor exhibits the most intense red persistent luminescence with the persistent time of as long as 200 min at the threshold value of 0.32 mcd/m 2 due to the presence of more trap levels with suitable depths of 0.71 eV. Compared with the solid solution of Sr, the solid solution of Mg ions can increase the depth of trap levels in CaAlSiN 3 . Among them, Mg 0.2 Ca 0.8 AlSiN 3 :0.2 at% Eu 2+ phosphor achieved a maximum trap depth of 0.98 eV, making it a promising candidate for optical information storage applications.
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JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Jiangbo Huo,Guoce Yu,Jianlong Wang
In this study, a novel adsorbent, polyvinyl alcohol/graphene oxide/MnO 2 composite was prepared, characterized and used for efficient removal of Co 2+ and Sr 2+ from aqueous solution. Polyvinyl alcohol (PVA) and Mn 2+ played a synergistic role in the gelation of PVA/GO/Mn 2+ , while Mn 2+ can be further converted into oxide to achieve functionalized aerogel (PVA/GO/MnO 2 ). The spectroscopy analysis manifested that hydrogen bonds and electrostatic attraction were responsible for the formation of PVA/GO/MnO 2 . The functionalization of MnO 2 enhanced the adsorption capacity for Co 2+ (2.1 folds) and Sr 2+ (1.3 folds) by PVA/GO/MnO 2 . The composite showed high adsorption capacity at broad pH range of 4.0–9.0. For competitive adsorption test, Ni 2+ /Zn 2+ exerted the most interfering effect on Co 2+ adsorption, while Mg 2+ /Ca 2+ showed severe interfering effect on Sr 2+ adsorption. Both electrostatic attraction and oxygen-containing groups contributed to the adsorption mechanism. This study may provide a new adsorbent for separation of Co 2+ and Sr 2+ from aqueous solution.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
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IF 5.7
Xuewei Luo,Hantao Li,Shuo Huang,Kaiyun Li,Jianping Li,Xiuen Yang,Chunhui Xu,Shuen Hou,Hongyun Jin
Anti-spinel oxide SrY 2 O 4 has attracted extensive attention as a promising host lattice due to its outstanding high-temperature structural stability and large thermal expansion coefficient (TEC). However, the overhigh thermal conductivity limits its application in the field of thermal barrier coatings . To address this issue, a novel high-entropy Sr(Y 0.2 Sm 0.2 Gd 0.2 Dy 0.2 Yb 0.2 ) 2 O 4 ceramic was designed and synthesized for the first time via the solid-state method. It is found that the thermal conductivity of Sr(Y 0.2 Sm 0.2 Gd 0.2 Dy 0.2 Yb 0.2 ) 2 O 4 is reduced to 1.61 W·m −1 ·K −1 , 53 % lower than that of SrY 2 O 4 (3.44 W·m −1 ·K −1 ) at 1500 °C. Furthermore, reasonable TEC (11.53 ×10 −6 K −1 , 25 °C ∼ 1500 °C), excellent phase stability, and improved fracture toughness (1.92 ± 0.04 MPa·m 1/2 ) remained for the high-entropy Sr(Y 0.2 Sm 0.2 Gd 0.2 Dy 0.2 Yb 0.2 ) 2 O 4 ceramic, making it a promising material for next-generation thermal barrier coatings.
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RSC Advances
·
2016
·Vol. 6
·期 60
·54679-54692
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IF 3.289
Yan Liu,Fangfang Liu,Liang Ni,Minjia Meng,Xiangguo Meng,Guoxing Zhong,Jian Qiu
In this paper, response surface methodology (RSM) was successfully applied for the first time to optimize the dynamic adsorption conditions for the maximum removal of Sr(II) ion from aqueous solutions using Sr(II) ion imprinted polymers (Sr(II)-IIPs) as adsorbents. Sr(II)-IIPs based on the support matrix of magnetic SBA-15 (Fe3O4@SBA-15) were prepared by a surface imprinted technique and RAFT polymerization. The adsorbents can be separated from the fixed-bed column after adsorption by an external magnetic field. The effects of the operational parameters for maximizing Sr(II) removal were studied using Box–Behnken design (BBD) combined with RSM. A second-order quadratic model was built to predict the responses. The significance of the independent variables and their interactions was studied and tested by analysis of variance (ANOVA). The adequacy of the model was tested by the correlation between the experimental and predicted values of the responses. At optimum adsorption conditions, the Sr(II) adsorption capacity of Sr(II)-IIPs was found to be 22.12 mg g−1. Moreover, Sr(II)-IIPs exhibited an excellent dynamic selectivity of Sr(II) and could be easily regenerated by a dynamic desorption process with a desorption ratio of 99.2%.
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JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2024
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IF 5.8
Shuna Zhao,Hao Liu,Mi Li,Lin Jiang
5-Aminotetrazole/strontium nitrate (5AT/Sr(NO 3 ) 2 ) propellant is widely utilized as green gas generating agent in fire extinguishers. To enhance the combustion rate and modify the gas production performance of 5AT/Sr(NO 3 ) 2 propellant, this study investigated the catalytic effects of adding different metal oxides (Bi 2 O 3 , PbO, TiO 2 , and CoO) on its pyrolysis and combustion process. The pyrolysis behavior, pyrolysis mechanism and combustion performance of 5AT/Sr(NO 3 ) 2 propellants were studied by using thermogravimetry (TG), derivative thermogravimetry (DTG), differential scanning caborimetry (DSC), mass spectrometry (MS), fourier transform infrared spectroscopy (FTIR) analysis and closed bomb vessel tests. Experimental results indicated that Bi 2 O 3 and PbO predominantly facilitated the thermal decomposition process of 5AT, while TiO 2 and CoO primarily catalyzed the thermal decomposition of Sr(NO 3 ) 2 . Certainly, the addition of metal oxides as catalysts to 5AT/Sr(NO 3 ) 2 propellant holds significant potential for improving the application as a gas generating agents in fire extinguishers.
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ACS Sustainable Chemistry & Engineering
·
2024
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IF 7.1
Jitong Deng,Yanan Zhang,Hongjing Han,Yongjun Zhang,Haiying Wang,Xuzhong Gong,Yanguang Chen
The chemical looping conversion of CH4 has been one of the most promising technologies for achieving the “two-carbon” strategy. Fe2O3 oxygen carrier cannot maintain the excellent release performance of lattice oxygen at high temperature due to the sintering and carbon deposition. Therefore, quaternary La1–xSrxFe1–y CoyO3 perovskite was selected as the transfer support of oxygen ions. By using the MOF precursor method, ternary La0.8Sr0.2FeO3 was prepared via the introduction of metal Sr into the binary LaFeO3. The adsorption energy of CH4 on the La0.8Sr0.2FeO3 was the lowest (−0.054 eV), compared with separate Fe2O3 and LaFeO3, and the adsorption energy of free H at the adjacent Fe site was the lowest (1.650 eV). Furthermore, the La1–xSrxFe1–yCoyO3 perovskite was successfully synthesized by the doping of Co into the ternary La0.8Sr0.2FeO3. La0.8Sr0.2Fe0.8Co0.2O3 was chosen to composite Fe2O3 oxygen carrier. As m(Fe2O3):m(La0.8Sr0.2Fe0.8Co0.2O3) = 1:1, the lattice oxygen conversion rate was less than 47% and the selectivity of CO2 reached 99.5% through the synergistic effect of lattice oxygen and oxygen vacancies. Fe2O3–La0.8Sr0.2Fe0.8Co0.2O3 increased the lattice oxygen conversion by 17.6%, compared with Fe2O3–La0.8Sr0.2FeO3. After the CH4 chemical looping conversion cycles five times, Fe2O3–La0.8Sr0.2Fe0.8Co0.2O3 still had favorable structural stability and oxidation performance, and the lattice oxygen conversion rate still reached >95%.
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JOURNAL OF CHEMICAL THERMODYNAMICS
·
2019
·
IF 2.29
Jun-Feng Wang,Pan Liang
A pure barium borate of BaB 8 O 11 (OH) 4 ·3H 2 O has been synthesized and characterized by XRD, FT-IR, TGA, and chemical analysis. The molar enthalpies of solution of BaB 8 O 11 (OH) 4 ·3H 2 O in 1 mol dm −3 HCl(aq), and Ba(OH) 2 ·8H 2 O in the mixture solvent of {2.00 cm 3 of 1 mol·dm −3 HCl + H 3 BO 3 (aq)} were measured by microcalorimeter at T = 298.15 K, respectively. With the use of previously determined enthalpy of solution of H 3 BO 3 (s) in 1 mol·dm −3 HCl(aq), and the standard molar enthalpies of formation for Ba(OH) 2 ·8H 2 O(s), H 3 BO 3 (s), and H 2 O(l), the standard molar enthalpy of formation of −(7500.6 ± 6.5) kJ·mol −1 at T = 298.15 K was obtained based on an appropriate thermochemical cycle. Moreover, the molar enthalpy of formation of −6091.7 kJ mol −1 for [B 8 O 11 (OH) 4 ] 2− was estimated by a group contribution method, which was used to predict the Δ f H m o of a series of alkaline-earth metal borates for MB 8 O 11 (OH) 4 (M = Ca, Sr, Ba).
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Ning Li,Hong Shao,Haina Qi,Yuqi Sheng,Liu Yang,Yunrui Xie,Dan Li,Wensheng Yu,Qianli Ma,Xiangting Dong
A simple and universal technique of the combination of uniaxial electrospinning with subsequent peculiar dual-crucible fluorination technology is innovatively designed and used to construct metallic fluorides yolk-shell nanofibers (YSNFs) and yolk-shell nanobelts (YSNBs) directly for the first time. As a case study, Yb 3+ /Er 3+ co-doped alkaline earth metal fluoride (BaF 2 , SrF 2 and CaF 2 ) as core layer and SiO 2 as shell layer are applied to construct the yolk-shell one-dimensional nanostructures . Under the optimum calcination temperature (600 °C) and time (5 h), the obtained MF 2 :Yb 3+ , Er 3+ /SiO 2 (M=Ba, Sr, Ca) samples are of pure cubic phase, and display the yolk-shell nanofibers and yolk-shell nanobelts with good size uniformity and green up-converting fluorescence. By HF acid treatment of the samples, it is not only proved that the shell layer is SiO 2 , but also independent core-layer MF 2 :Yb 3+ , Er 3+ (M=Ba, Sr, Ca) nanofibers and nanobelts with good size uniformity and excellent up-conversion luminescence are obtained. Especially, only fluorination process among the halogenation can form such exceptive YSNFs and YSNBs one-dimensional nanostructures , and the formation mechanisms of YSNFs and YSNBs are proposed and verified, and further the novel technique is established. The new technique possesses the merits of simple device and easy operation, large output, well-defined morphology and high preparative success rate of yolk-shell nanofiber and yolk-shell nanobelt, universality to metallic fluorides. The design philosophy and the construction technique for the exceptional yolk-shell one-dimensional nanostructures afford a facile approach for the fabrication of other functional metal fluorides yolk-shell one-dimensional nanostructures.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Li Yang,Yong Jiao,Dongyan Jia,Yanzhi Li,Chuanhua Liao
Metal-based perovskite oxides have contributed significantly to the advanced oxidation processes (AOPs) due to their diverse active sites and excellent compositional/structural flexibility. In this study, we specially designed a perovskite oxide with abundant oxygen vacancies, SrCo 0.8 Fe 0.2 O 3 (SCF), and firstly applied it as a catalyst in peroxymonosulfate (PMS) activation towards organic pollutants degradation. The result revealed that the prepared SCF catalyst exhibited excellent performance on organic compounds degradation. Besides, SCF showed much better activity than La 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3 (LSCF) in terms of reaction rate and stability for the degradation of the organic compounds. Based on the analysis of scanning electron microscope, transmission electron microscope, X-ray diffraction, N 2 adsorption–desorption, X-ray photoelectron spectroscopy and electron paramagnetic resonance, it was confirmed that the perovskite catalysts with high content of Sr doping at A-site could effectively create a defect-rich surface and optimize its physicochemical properties, which was responsible for the excellent heterogeneous catalytic activity of SCF. SCF can generate three highly active species: 1 O 2 , SO − 4 ∙ and ∙OH in PMS activation, revealing the degradation process of organic compounds was a coupled multiple active species in both radical and nonradical pathway. Moreover, it was mainly in a radical pathway in the degradation through PMS activation on SCF and SO − 4 ∙ radicals produced were the dominant species in SCF/PMS system. This study demonstrated that perovskite-type catalysts could enrich OVs efficiently by doping strategy and regulate the PMS activation towards sulfate radical-based AOPs.
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