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.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2026
·
IF 6.5
Xiaorong Zhang,Xiangyu An,Weiming Yi,Zhihe Li,Andong Zhang,Deli Zhang,Shanjian Liu,Lihong Wang
To enhance the ketone and phenol contents in corn stover (CS) pyrolysis bio-oil, a tandem dual-catalyst system integrating reduced red mud (RRM) and a reduced Fe/Ca catalyst was employed. A systematic study was conducted, focusing on the effects of the Fe/Ca mass ratio, reduction temperature, pyrolysis temperature, and catalyst recycling on the content and selectivity of the target products. The reaction mechanisms underlying the enrichment of ketones and phenols were also elucidated. Results indicated that at an Fe/Ca mass ratio of 1:2 and a reduction temperature of 650 °C (FC2-R650), Fe/Ca displayed an increased number of surface oxygen vacancies, a greater abundance of acid-base sites, and enhanced textural properties manifested by an enlarged specific surface area and expanded pore volume. Its crystal structure was primarily composed of Ca 2 Fe 2 O 5 and CaO. The tandem catalysis enhances the efficiency of RRM in promoting reactions including cyclization, cross-ketonization, and alkylation-for pyrolysis vapor molecules. At a pyrolysis temperature of 500 °C, RRM single-stage catalysis yielded phenol and ketone contents of 22.72 % and 30.51 %, respectively. Under tandem catalysis, these contents increased to 42.87 % and 37.31 %, while carboxylic acids and light aldehydes were not detected. Recycling experiments confirmed the good cycling performance of the tandem catalytic system, with the content of ketones and phenols maintained at 73.67 % after three cycles. The tandem dual-catalyst system based on RRM and FC2-R650 offers an innovative catalytic strategy for the resource utilization of agricultural and industrial wastes, contributing to the production of sustainable fuels and high-value chemicals.
✓ 已验证
产品关联
DOI
高影响因子
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.
✓ 已验证
产品关联
DOI
高影响因子
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.
研究领域:
材料科学
·
电子功能材料
·
微波技术
·
无机非金属材料
·
介电材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Shuang Wu,Zheni Wang,Lei Wan,Chenghui Luo,Shams Ali Baig,Xinhua Xu
In the present study, Pd/Ni foam electrode was prepared by improved impregnation method for electrocatalytic hydrodechlorination (ECH) of clofibric acid (CA). The effects of complexing agent addition into the impregnation solution for the formation of Ni(OH) 2 and the ECH activity of Pd/Ni foam electrode were investigated. Results revealed that the introduction of sodium acetate (the complexing agent) greatly enhanced the ECH activity as compared to common impregnation liquid. Characterizations analyses demonstrated that the addition of sodium acetate did not change the phase of the electrode’s surface, but effectively reduced the deposition of Ni(OH) 2 . The surface morphology of the electrode was changed simultaneously by the addition of sodium acetate and the interlacing structure of Ni(OH) 2 and Pd catalyst was formed. NaAc before -Pd/Ni and NaAc after -Pd/Ni foam electrodes were used to perform ECH experiments on CA, and the combined Pd/Ni foam 15 min electrode was compared with the Pd/Ni foam 6 h electrode. After 2 h of electrolysis, the NaAc after -Pd/Ni foam electrode was found to remove the CA (∼100%) in the solution, which was 1.3 times the removal rate of the Pd/Ni foam 6 h electrode to CA and exceeded the Pd/Ni foam 15 min electrode. Findings from the present study demonstrated that adding the complexing agent into the impregnation solution can improve the ECH activity of Pd/Ni foam electrode and achieve a faster and more efficient dechlorination effect of CA.
研究领域:
环境化学
·
电化学
·
催化
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 19
·54556-54567
·
IF 5.8
Zhang Ge,Yang Huifen,Li Xuan,Zhou Yichen,Guo Song,Zhao Tong
The control of multiple heavy metals (HMs) pollution in solid wastes, especially the co-contamination of As and other heavy metal cations, is of great importance to ecological and environmental health. To address this problem, the preparation and application of multifunctional materials have attracted wide attention. In this work, a novel Ca-Fe-Si-S composite (CFSS) was applied to stabilize As, Zn, Cu, and Cd in acid arsenic slag (ASS). The CFSS exhibited synchronous stabilization ability for As, Zn, Cu, Cd and owned strong acid neutralization capacity. Under simulated field conditions, the acid rain extracted HMs in ASS successfully decreased below the emission standard (GB 3838–2002-IV category in China) after incubated by 5% CFSS for 90 days. Meanwhile, the application of CFSS promoted the transformation of leachable HMs into less accessible forms, which was conductive to the long-term stabilization for HMs. There was competitive relation among the three heavy metal cations, following the stabilization sequence of Cu > Zn > Cd during incubation. And the stabilization mechanisms of HMs by CFSS were proposed as chemical precipitation, surface complexation, and ion/anion exchange. The research will be greatly conducive to the remediation and governance of field multiple HMs contaminated sites.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Wang Huan,Fan Yanmiao,Yang Qiaoli,Sun Xiaoyu,Liu Hao,Chen Wei,Aziz Ayesha,Wang Shenqi
Redox activity is an important indicator for evaluating electrochemical biosensors. In this work, we have successfully polymerized indole-5-carboxylic acid into poly-5-carboxyindole nanomaterials (PI-5-CA), using its superior redox activity, and introduced carboxylated single-walled carbon nanotubes (C-SWCNTs) to synthesize a composite material. Finally, a synthesized composite material was used for the modification of the glass carbon electrode to fabricate the PI-5-CA/C-SWCNTs/GCE-based immunosensor and was successfully applied for the sensitive detection of E. coli O157:H7. The fabricated immunosensor exhibited an outstanding electrocatalytic activity toward the detection of E. coli O157:H7 with a remarkably lowest limit of detection (2.5 CFU/ml, LOD = 3 SD/k, n = 3) and has a wide linear range from 2.98×101 to 2.98×107 CFU/ml. Inspired from the excellent results, the fabricated electrode was applied for the detection of bacteria from real samples (water samples) with a good recovery rate (98.13–107.69%) as well as an excellent stability and specificity. Owing to its simple preparation, excellent performance, and detection time within 30 min, our proposed immunosensor will open a new horizon in different fields for the sensitive detection of bacteria from real samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Jun Li,Jie Hou,Ying Lu,Qi Wang,Xiuan Xi,Yun Fan,Xian-Zhu Fu,Jing-Li Luo
CO 2 -poisoning effect on cathodes is an unnegligible problem for commercial application of solid oxide fuel cells (SOFCs). In order to enhance CO 2 tolerance of cathodes, partial replacement of Ba by Ca in BaCo 0·4 Fe 0·4 Zr 0·1 Y 0·1 O 3-δ (BCFZY) cathode is proposed in this study. The stability of Ba 0·95 Ca 0·05 Co 0·4 Fe 0·4 Zr 0·1 Y 0·1 O 3-δ (BCaCFZY) and BCFZY in CO 2 -containing atmosphere is investigated comparably. When tested in a symmetrical cell and exposed to air with 1% CO 2 or 10% CO 2 , the electrochemical performance of BCFZY cathode shows obviously degradation and carbonate particles are formed on the cathode surface . Exhilaratingly, the polarization resistance of BCaCFZY cathode is more stable and the cathode surface remains clean. The durability test in proton-conducting single cells further proves that the fine stability of BCaCFZY cathode can be achieved in air with 1% CO 2 atmosphere. In addition, thermodynamic analysis reveals the mechanism of Ca doping to improve stability. Ca dopant itself has a high CO 2 resistance and the introduction of Ca element reduces Ba segregation on surface. Base on the experimental results above, the BCaCFZY cathode is a promising candidate for SOFC applications .
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Xin Xiong,Yao Zhang,YinFang Wang,HaiFeng Sha,Nengqin Jia
By virtue of the metal organic framework UiO-66-NH 2, an ingenious electrochemiluminescence immunosensor was successfully constructed for subtle exploration of the breast cancer biomarker CA 15-3. In this protocol, Ru(bpy) 3 Cl 2 ·6H 2 O (Ru(bpy) 3 2+ ), as a conventional luminescent reagent, provides a stable and strong luminescent signal. The UiO-66-NH 2 serves as a carrier to provide a large specific surface area for enhancing the electrochemical luminescence signal response of Ru(bpy) 3 2+ . UiO-66-NH 2 , Ru(bpy) 3 2+ are fixed together with Nafion membrane, and CA 15-3 antibody is covalently conjugated onto the membrane through the amide reaction. Ru(bpy) 3 2+ @UiO-66-NH 2 is used as the detection system. The experimental results reveal that the ECL signal decreased obviously after the CA 15-3 antigen molecule is captured on the immunosensor, with the capture of manifesting the principle of electrochemical luminescence quenching detection. Under optimal conditions, the sensor is sensitive and selective for detecting CA 15-3 with the detection range from 5 × 10 −4 to 5 × 10 2 U mL -1 and the low LOD (1.7705 × 10 -5 U mL -1 ). Furthermore, multiple experiments elucidate that the as-prepared sensor could be used for susceptibly detect CA 15-3 in actual samples, which has underlying application prospects in biological analysis.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2016
·
IF 3.12
Mei Wang,Jianling Xia,Jianchun Jiang,Shouhai Li,Kun Huang,Wei Mao,Mei Li
A novel liquid Ca/Zn thermal stabilizer was synthesized from tung-maleic anhydride (TMA) as feedstock and evaluated for its stabilizing effects on poly (vinyl chloride) (PVC). First, N -(3-amino-benzoic acid) tung-maleamic acid (ABTMA) was prepared from the ammonolysis of TMA and para -aminobenzoic acid (PABA). Then its complex calcium salt (ABTMA-Ca) and zinc salt (ABTMA-Zn) were synthesized through a one-step method, and investigated by Fourier transform infrared spectroscopy and elemental analysis . ABTMA-Ca and ABTMA-Zn were separately treated with diethylene glycol monobutyl ether at 120 °C for 3 h to form liquid ABTMA-Ca (LABTMA-Ca) and liquid ABTMA-Zn (LABTMA-Zn). The effects of LABTMA-Ca/LABTMA-Zn, CaSt 2 /ZnSt 2 and C36DA-Ca/C36DA-Zn on thermal stability of PVC were studied through Congo Red test, discoloration tests and dynamic thermal stability analysis. The LABTMA-Ca/LABTMA-Zn thermal stabilizer exhibit excellent long-term stability. Analysis of tensile and dynamic mechanical properties shows PVC samples stabilized with LABTMA-Ca/LABTMA-Zn and the other two Ca/Zn systems all display comparable strength , modulus and glass transition. A common stabilizing mechanism of LABTMA-Ca/LABTMA-Zn system and its radical mechanism were presented, respectively.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Geng Tang,Hong Yang,Bingqing Zhao,Dunying Wang,Fangfang Zeng,Qibin Liu
The rapid repair of bone defects remains a challenging clinical goal, with bio-piezoelectric composites emerging as promising materials due to their ability to replicate bone’s natural composition and electrical functionality. This study developed hydroxyapatite (HA)-based composites incorporating (Ba,Ca)(Ti,Sn)O3-based piezoceramics, achieving piezoelectric coefficients of 28.7 ± 2.48 pC/N, 11.1 ± 0.57 pC/N, and 5.7 ± 0.98 pC/N at HA mass fractions of 10%, 20%, and 30%, respectively, with a porosity around 20%. The composites were synthesized with a solid-state sintering method. The phase structure, surface morphology, and ferroelectric domain configuration of the composites were characterized. Electrical properties, compressive strengthen, hydrophilicity, in vitro bioactivity, biocompatibility and osteogenic ability were assessed. X-ray diffraction (XRD) analysis confirmed that all composites consisted of perovskite structure and HA phases. Microscopic observations revealed the (Ba,Ca)(Ti,Sn)O 3 -based piezoceramics particles embedded within the HA matrix. Evenly dispersed, irregular pores were formed, and pore size decreased as the HA content increased. The composite with 20 wt.% HA exhibited dense, small wedge-shaped domains and ferroelectric orthogonal (O) phase. Importantly, these composites demonstrated favorable compressive strength, surface wettability and biocompatibility, along with enhanced bioactivity and osteogenic differentiation ability in vitro , underscoring their potential in bone tissue engineering applications.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）