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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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121155
·
IF 7.2
Yaqi Liu,Hui Lu,Changfei Gao,Yameng Wang,Haoran Liu,Huiqiang Ma,Bo Wang,Lifen Liu,Yihua Li,Xianbo Chang
The persistent threat posed by radioactive metal contamination necessitates the development of innovative and sustainable remediation strategies. In this study, we proposed a self-sustaining bioelectrocatalytic reduction system (BECRs) incorporating an in situ co-synthesized ternary Fe/Cu/Co@Z-CF cathode derived from zeolite imidazole salt skeleton (ZIF) -functionalized carbon felt. The engineered electrode demonstrated outstanding electrocatalytic performance, characterized by an ultrahigh exchange current density of 7.68 × 10 −3 A cm −2 and minimal charge transfer resistance of 0.11 Ω. These properties were attributed to the synergistic redox cycling of Fe-Cu-Co species and the enhanced exposure of active sites facilitated by the ZIF structure. Under optimized conditions at pH 11, the BECRs achieved removal efficiencies exceeding 98.28 % for targeted radionuclides (Cs + : 99.00 %, Sr 2+ : 98.28 %, Tb 3+ : 99.95 %, Eu 3+ : 99.97 %) while generating a stable bio-voltage of 730 mV. The removal mechanisms operated synergistically through three primary pathways: direct electroreduction of metals to elemental or metallic oxide forms at the catalytic cathode; electroflocculation mediated by in situ formation of Fe(OH) x species and microbial adsorption by enriched pollutant-resistant microbial consortia, notably with a 16.3 % increase in Bacteroidota abundance. Density Functional Theory (DFT) calculations revealed charge complementarity among Fe/Cu/Co sites, accelerating oxygen reduction kinetics. Crucially, the electrode demonstrated negligible metal leaching across pH 3–11, confirming ecological safety. Kinetic analysed distinguish radionuclide-specific pathways: pseudo-first-order for Cs⁺/Sr²⁺ versus pseudo-second-order for Tb 3+ /Eu 3+ , informing selective recovery strategies. This work established a green, energy-positive paradigm for radioactive wastewater treatment, achieving simultaneous decontamination, resource recovery (metallic Cs/Sr/Tb/Eu) with significant potential for closed-loop nuclear effluent management.
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ChemCatChem
·
2026
·Vol. 18
·期 13
·e70894
·
IF 4.1
Siqi Tan,Jie Gu,Kexin Sha,Yihan Jiao,Yanxi Wu,Yiru Wang,Hongjian Yu,Jie Han
Niobates have emerged as promising candidates for environmental catalysis, particularly in the realm of piezocatalysis, owing to their distinctive layered architectures and robust physicochemical performance. In this study, we report the successful fabrication of A-site cation-tailored ABi 2 Nb 2 O 9 (A = Sr, Ca, and Ba) layered oxides via a molten salt strategy. Notably, the molten salt-synthesized SrBi 2 Nb 2 O 9 exhibits superior piezocatalytic performance in H 2 O 2 evolution with a yield reaching 1836.1 µmol g −1 h −1 , approximately 2.1 times higher than that of SrBi 2 Nb 2 O 9 prepared by the solid-state method. Furthermore, this material demonstrates exceptional piezocatalytic activity, degrading 98.0% of Rhodamine B within 75 min, with a reaction rate constant of 0.04966 min −1 . In addition, the catalyst shows durable stability, maintaining 97% of its original activity after four cycles. The influence of environmental factors, including solution pH and inorganic anions (Cl − and CO 3 2− ), was also systematically evaluated. This work elucidates that the synergistic integration of A-site cation engineering and molten salt synthesis effectively modulates the piezoelectric response of ABi 2 Nb 2 O 9 (A = Sr, Ca, and Ba), offering new insights and a viable pathway for the design of novel, high-performance piezocatalysts for environmental remediation. Graphical Molten salt-mediated A-site cation engineering of ABi 2 Nb 2 O 9 effectively modulates piezoelectric response, achieving superior piezocatalytic H 2 O 2 production and pollutant degradation. This work provides a viable pathway for designing high-performance piezocatalysts for environmental remediation.
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JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2022
·Vol. 103
·期 3
·865-875
·
IF 2.606
Jia Jiannan,He Mengting,Wang Yunpeng,Zhang Wei,Wan Jun,Zhang Yuting,Xu Qiang,Chen Shiguo,Qiao Xvsheng,Fan Xianping
A propylene oxide (PO)-driven fast sol-gel route followed with a post high temperature calcination were utilized to synthesize Ca x Sr 1- x Al 2 O 4 : Eu 2+ cationic solid solution phosphors with micro-spherical morphologies and improved internal quantum efficiencies. The polyethylene oxide (PEO) was also employed to induce the phase separation of Ca x Sr 1- x Al 2 O 4 : Eu 2+ precursors to get monodispersed spherical morphologies in the sol-gel system. Benefit from uniform copolymerization of each chemical components and pyrolysis of organic matter, Ca, Sr, Al and O were homogenously distributed in the produced Ca x Sr 1- x Al 2 O 4 : Eu 2+ cage like microspheres. It helps to efficiently trap incident light and to improve the PL efficiencies. By changing the ratio of Ca/Sr, infinite solid solution polycrystalline phosphors, Ca x Sr 1- x Al 2 O 4 : Eu 2+ microspheres with x = 0~1, can be obtained and their PL emission can be gradually tuned from green to white to blue. Micro-spherical SrAl 2 O 4 : Eu 2+ , Ca x Sr 1- x Al 2 O 4 : Eu 2+ and CaAl 2 O 4 : Eu 2+ phosphors exhibited internal quantum efficiencies as high as 71.1, 35.3~45.9 and 75.3%, respectively.
Graphical abstract
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APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yupeng Xie,Jie Wang,Yaocheng Hu,Jing Zhang,Yong Gao,Haipeng Li,Sheng Wang
The contamination of fission products ( 90 Sr and 137 Cs) on the metallic material (316L stainless steel) of alkaline spent fuel storage pond threatens to decommission nuclear facilities. Compared with previous studies unable to detect Cs on the surface of contaminated steel by laser-induced breakdown spectroscopy (LIBS), this study selected the emission lines of Sr II 407.74 nm and Cs I 455.77 nm as the analytical spectral lines of LIBS, and for the first time satisfactorily measured and analyzed the accumulation of Sr and Cs on the surface of 316L stainless steel for 7, 14, 21, 30 and 60 days, respectively. It was found during the accumulation, the concentration of Sr and Cs on the surface reached their maximum after 21 days, and relatively stabilized 30 days later. In addition, combined with the physicochemical characterizations, the contamination mechanism of Sr and Cs on 316L stainless steel was proposed, with the contaminants gradually diffusing from the oxide layer dissolved and damaged in the alkaline corrosive environment to the matrix. Strontium had two forms on the steel surface: SrCrO 4 in the oxide layer and SrCO 3 in the matrix, but the contamination of Cs was more inclined to the surface than Sr.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Pengfei Gao,Yangpeng Zuo,Yulu Yang,Jinxiu Yu,Wuzhe Fan,Ruqing Bai,Weihu Yang,Kaiyong Cai
To resolve the short-term inflammatory storm after the operation and the long-term osteointegration deficiency of titanium (Ti) implant as an artificial hip joint, in this work, a novel functionalized Ti implant with an “on-demand” treatment strategy was explored. The metallopolyphenol network (Epigallocatechin gallate (EGCG) and Strontium) wrapped Prussian blue nanoparticles were prepared and anchored on the Ti surface. During the acute inflammatory phase, the inflammatory acidic microenvironment will result in the degradation of the metallopolyphenol network and the responsive release of EGCG and strontium (Sr) ions. The released EGCG could reduce oxidative stress damage and promote the transition of macrophages from M1 to M2. In comparison, Sr ions could stimulate osteoblast differentiation and achieve the rapid osteogenesis and fixation of implants. To achieve long-term osteointegration efficacy, “on-demand” near-infrared light irradiation for the remained PB particles could be adopted if necessary. The mild photothermal conversion temperature could upregulate the expressions of heat shock proteins around the implant and promote the biosynthesis of type I collagen, as well as the formation of bone matrix. In vitro and in vivo results proved the feasibility of our strategy. It is a prospective method for the modification of Ti implants.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Changran Zheng,Zhoudong Yang,Baotong Guo,Hanqing Dai,Tianhe Lu,Xi Zhu,Huimin Xu,Bobo Yang,Jun Zou,Sergey Lishik,Jiajie Fan
(Sr, Ca)AlSiN 3 :Eu 2+ (SCASN) phosphors are widely used in white LEDs due to their excellent red spectral performance. However, exposure to high temperature, high humidity, and sulfur-containing environments significantly degrades their performance and long-term stability. Herein, a rapid plasma-assisted deposition technique is employed to apply an ultrathin Si-based nanolayer onto SCASN (SCASN-Coated), enhancing its durability under such harsh conditions. Accelerated aging tests conducted at 100 °C, 100 % relative humidity (RH), and in a sulfur-containing atmosphere reveal that unmodified SCASN retains only 24.1 % of its initial luminous intensity after 1008 h, whereas the SCASN-Coated preserves approximately 41.2 % of their original brightness without compromising intrinsic luminescent properties. First-principles calculations and molecular dynamics simulations further elucidate that SCASN has a strong chemical adsorption effect on SO 2 (−3.056 eV). And the combined presence of SO 2 and H 2 O promotes the displacement of Ca 2+ ions, accelerating degradation. The protective SiO 2 nanolayer drastically reduces the SO 2 adsorption energy (−0.124 eV) and inhibits Ca 2+ ion migration. This surface protection strategy not only augments the resilience of SCASN phosphors under extreme conditions but also provides research paradigm into the degradation mechanisms, thereby offering new avenues for extending the service life of LED devices in challenging environments.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jie Li,Ziyi Zhang,Hongji Zou,Ying Tang,Weiping Gong,Liang Fang
Dense ALaGa 3 O 7 (A = Ba, Sr, Ca) ceramics with tetragonal melilite structure were prepared by the solid-phase method. The optimal microwave dielectric properties were obtained with ε r = 11.1 ± 0.1, 11.3 ± 0.1, 13.3 ± 0.1; Q × f = 49,400 ± 300, 31,100 ± 300, 17,100 ± 300 GHz; and τ f = −41.5 ± 1.0, −36.6 ± 1.0, −28.8 ± 1.0 ppm/°C for BaLaGa 3 O 7 , SrLaGa 3 O 7 , and CaLaGa 3 O 7 , respectively. The increased ε r and τ f while reduced Q × f in the order of BaLaGa 3 O 7 , SrLaGa 3 O 7 , and CaLaGa 3 O 7 were mainly due to the enhanced rattling effect of A-site, which resulted in large positive discrepancy Δ ε r between ε r ( Corr ) and ε r (C-M) increasing from +31.8 % to +74.7 %. The vibration modes, chemical bond characteristic and intrinsic dielectric properties were analysed by Raman, P-V-L theory, and far-infrared reflectance spectroscopy. Additionally, a dielectric resonator antenna based on BaLaGa 3 O 7 ceramic was designed with a bandwidth of 270 MHz at 6.8–7.1 GHz and a gain of 5.6 dBi at 6.9 GHz, indicating the potential candidate for dielectric resonator antennas.
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JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
·
2022
·Vol. 39
·期 10
·2625-2636
·
IF 2.058
Hang Liu,Xingke Zheng,Pengcheng Wang,Haiyan Wang,Yuhong Zhang
In this work, a comparative study of the upconversion (UC) luminescence properties of ${{\rm Er}^{3 +}} {-} {{\rm Yb}^{3 +}}$-co-doped ${{\rm AWO}_4}$ (${\rm A} = {\rm Ba}$, Sr, and Ca) scheelite phosphors and ${{\rm Er}^{3 +}} {-} {{\rm Yb}^{3 +}} $-co-doped ${{\rm MgWO}_4}$ wolframite phosphors is reported. Under 980 nm excitation, all the samples emit green and red emissions. The ${{\rm Er}^{3 +}} {-} {{\rm Yb}^{3 +}}$-doped ${{\rm MgWO}_4}$ phosphor has a higher UC emission intensity. Furthermore, the optical temperature sensing properties in ${{\rm Er}^{3 +}} {-} {{\rm Yb}^{3 +}}$-co-doped ${{\rm AWO}_4}$ (${\rm A} = {\rm Ba}$, Sr, Ca, and Mg) phosphor samples are investigated. The relative sensitivity (${{\rm S}_r}$) based on thermally coupled levels (TCLs) increases gradually with an increase in matrix phonon energy. The absolute sensitivity (${{\rm S}_a}$) values of the samples are accurately predicted by the chemical bonding parameter (${{\rm f}_c}$). The results of the correlation between the UC luminescence properties and the microscopic crystal structure, and the relationship of the temperature sensitivity and the host parameters, provide us with a guiding insight for the selection of a host material with ideal temperature measurement capability.
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Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 43
·13536-13547
·
IF 6.641
Dongjie Liu,Peipei Dang,Xiaohan Yun,Guogang Li,Hongzhou Lian,Jun Lin
Recently, controllable luminescence tuning and single-phased white light emission have been extensively studied to improve the luminescence performances of phosphors for white light-emitting diodes (WLEDs). In this work, the controllable photoluminescence tuning from bluish-green to red was successfully achieved in Bi3+,Eu3+-codoped Sr2−yBayLaGaO5 solid solutions, combining the effects of crystallographic site engineering and energy transfer. The phase composition and structural variation of the designed phosphors were thoroughly analyzed through X-ray powder diffraction (XRD) and Rietveld refinement. The effects of cation substitutions on the photoluminescence properties were investigated in detail and the corresponding mechanism was proposed. A regular red-shift of Sr2−yBayLaGaO5:0.02Bi3+ in the bluish-green region could be observed when Sr2+ was substituted by Ba2+, which is attributed to the crystal field splitting and nephelauxetic effect. The red-shift of emission of Ba2LaGaO5:0.02Bi3+ phosphor with gradually increasing excitation wavelength reveals that Bi3+ ions occupy different cation sites to form multiple luminescent centers. Besides, the efficient energy transfer was designed and successfully realized in Sr2−yBayLaGaO5:0.02Bi3+,zEu3+ (y = 0–2.0; z = 0–0.20) samples. The energy transfer efficiency can reach up to 88%, 91% and 77% at z = 0.20 for y = 0, 1.0 and 2.0, respectively. Moreover, the thermal quenching behaviors of the studied phosphors reveal that the codoping of Eu3+ could efficiently improve the thermal stability of Sr2LaGaO5:0.02Bi3+ phosphor. Finally, the WLED devices were fabricated by composing 370 nm UV chips and single-phased Sr2−yBayLaGaO5:0.02Bi3+,0.05Eu3+ (y = 0, 1.0, 2.0) phosphors. The as-fabricated devices presented relatively excellent EL performances, the color coordinates of which all locate in the warm white light region. These results indicate the as-prepared Sr2−yBayLaGaO5:Bi3+,Eu3+ phosphors can be potential candidates for color tuning and efficient single-phased white emission in UV-based WLED lighting applications.
研究领域:
材料科学
·
光学材料
·
固态照明
·
荧光粉化学
·
能量传递
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Light-Science & Applications
·
2026
·Vol. 15
·期 1
·229
·
IF 24
Yu Dechao,Liu Haisheng,Lv Mengting,Li Benchun,Zhou Yayun,Han Xinxin,Zhang Dawei
New generation of Cr 3+ -free eco-friendly phosphors (no risk of Cr 3+ → Cr 6+ oxidization toxicity) are highly sought to develop broadband NIR light sources. As an essential element for body health, Fe 3+ ion would be an exceptional alternative in strong octahedral crystal field. Here, the Fe 3+ activators were utilized in orthoborate-pyroborate A 2 Sc 2 B 4 O 11 for creating novel NIR-emitting phosphors. A broad absorption over 240–450 nm due to O 2- → Fe 3+ charge transfer transition was recorded for Sr 2 Sc 2 B 4 O 11 :Fe 3+ (SSBO:Fe 3+ ) at 370 nm and Ba 2 Sc 2 B 4 O 11 :Fe 3+ (BSBO:Fe 3+ ) at 355 nm. Resultant NIR emissions with large full width at half maximum about 170 nm were obtained for SSBO:Fe 3+ peaked at 975 nm and BSBO:Fe 3+ at 930 nm. The unique excitation of Fe 3+ doping towards near-ultraviolet (near-UV) region was initially achieved for potential advantage of coupling a mainstream UV chip. Codoping of Yb 3+ into A 2 Sc 2 B 4 O 11 :Fe 3+ made emission peak red-shift towards 1000 nm and ~ 160-fold enhancement in the integral intensity owing to a robust energy extraction from the major dark (nonluminous) Fe 3+ . The optimized SSBO:0.02Fe 3+ ,0.15Yb 3+ exhibited considerable internal and external quantum efficiency ~ 78% and 48%, respectively. Compared to the luminescence thermal stability of ASBO:Fe 3+ (32%@373 K, i.e., sustaining 32% of its room-temperature emission intensity at 373 K), the Yb 3+ codoping endowed much superior stability > 63%@373 K, and additional temperature sensing with relative sensitivity ~ 1.5% K −1 at 423 K. Ultimately, by coating the novel phosphors onto UV ~ 365 nm chips, the home-made pc-LEDs were applied in night vision, food inspection, biomedical imaging, and spectroscopy analysis.
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PubMed
高影响因子
Advanced Healthcare Materials
·
2026
·
IF 11
Min Liu,Shuya Wang,Ruishi Li,Weimin Qi,Tingli Xiong,Xiaojing Shi,Wensheng Chen,Feixiang Ding,Chenglong Wei,Junyan Liu,Niansheng Li,Qiong Huang,Zhaoqian Liu,Kelong Ai
Acute liver injury (ALI) is a significant clinical cause of liver failure, potentially occurring at any stage of liver disease and posing a considerable health burden. One prevalent model of ALI stems from acetaminophen (APAP) overdose, where a vicious cycle of “mitochondrial damage-inflammation amplification” and limited availability of small molecular drugs hinder current therapeutic approaches. Herein, a novel tannic acid (TA)-strontium (Sr) nanodrug (SrTA) is proposed. With liver-accumulating and mitochondria-targeting capabilities, SrTA effectively harnesses the broad-spectrum antioxidant properties of TA along with the calcium homeostasis-regulating function of Sr 2+ . And its therapeutic efficacy surpassed that of an equivalent dose of N-acetylcysteine (NAC). Mechanistically, SrTA directly scavenges mitochondrial reactive oxygen species (ROS), protects mitochondrial integrity, and alleviates endoplasmic reticulum (ER) stress and intracellular oxidative damage. Additionally, SrTA antagonizes calcium signaling, reduces the formation of mitochondria-ER contacts, and inhibits mitochondrial calcium overload. By safeguarding mitochondrial function and preventing the aberrant opening of the mitochondrial permeability transition pore (mPTP), SrTA significantly curtail hepatocyte death and mitigates mtDNA-induced sterile inflammation, effectively halting the injury cascade. In conclusion, this study presents a novel therapeutic strategy for ALI that targets mitochondria and synergistically regulates ROS bursts and calcium overload, achieving multifaceted therapeutic effects.
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高影响因子
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