Journal of CO2 Utilization
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2019
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IF 5.189
Wei Zhang,Fengzhen Zhang,Liping Ma,Jing Yang,Yi Wei,Deqi Kong
In this work, we propose a novel, effective, energy efficient technology to reduce CO 2 emissions and fully use the calcium in the solid waste by-product phosphogypsum (PG), by capturing CO 2 from the PG decomposition product’s hydrolysis solution. Experiments were conducted to investigate the technical feasibility and the influence of temperature and CO 2 partial pressure on CO 2 capture, as well as CO 2 loading on CO 2 sorption capacity. The results showed that > 90 % of the total calcium ions in the solution were converted into calcium carbonate (CaCO 3 ). Furthermore, a decrease in temperature and an increase in CO 2 partial pressure improved CO 2 uptake, with the latter having a greater effect on CO 2 capture capacity than the former. Moreover, kinetic analysis demonstrated that a higher temperature and CO 2 partial pressure increased the absorption rate; and showed that the CO 2 absorption rate is highly affected by the CO 2 loading levels. The thermodynamic analysis indicated that CO 2 absorption heat significantly declined as a function of increasing CO 2 loading. CaO from the calcination of carbonate was added to the hydrolysis solution and significantly enhanced its CO 2 capture ability. Thus, the hydrolyate of PG decomposition products in combination with CaO reinforcement may be a promising method for CO 2 capture.
研究领域:
环境化学
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工业生态学
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固废资源化
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碳捕集与封存
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过程强化
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高影响因子
CRYSTAL RESEARCH AND TECHNOLOGY
·
2015
·Vol. 50
·期 4
·312-318
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IF 0.935
Yadong Hu,Yinghua Zhou,Xurong Xu,Ruikang Tang
The evolution of amorphous calcium carbonate (ACC) into crystals in ethanol/water binary solvents under ambient temperature was investigated, and it was found to depend on the volume ratio of ethanol to water (R). Calcite remained dominant when the amount of water was high (R = 1/3). A slight change in the amount of ethanol (R = 3/1) could lead to a dramatic change in the polymorph from calcite to aragonite. However, when poly (allylamine hydrochloride) (PAH) was added at R = 3/1, almost pure vaterite could be obtained, which has a specific morphological variation (from hollow microspheres to cloud-like). This study provides an alternative polymorphic route for the CaCO 3 mineral by using the evolution of ACC in different solvent environments, which provides some useful clues for understanding the importance of kinetic control of the morphologies and polymorphs of a wide range of inorganic materials. In addition, this simple mild phase-controlled synthetic method could be scaled up as a green chemistry route for the industrial production of different polymorphs of CaCO 3 .
研究领域:
材料化学
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结晶学
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纳米材料
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生物矿化
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绿色化学
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功能材料
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高影响因子
JOURNAL OF MATERIALS CHEMISTRY
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2011
·Vol. 21
·期 40
·16028-16034
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IF 5.101
Jun Shi,Zhengzheng Zhang,Gefei Li,Shaokui Cao
Alginate/CaCO3 hybrid beads with pH- and thermal-responsive drug release properties were prepared under compressed CO2 using aliphatic poly(urethane-amine)s (PU) as the thermal-responsive component. Polyacrylic acid (PAA) was used as a crystal growth additive to control the structure of the hybrid beads. The hybrid beads were characterized by using scanning electron microscopy, X-ray powder diffraction and thermogravimetric analysis. The interaction between PAA and aliphatic PU contributed to the formation of alginate beads with a compact CaCO3 shell. Indomethacin release behaviour was found to be pH- and thermal-responsive. The release profiles were sustained with CaCO3 microparticles, indicating that the compact CaCO3 shell could hinder the permeability of the encapsulated drug and reduce the drug release effectively. The results suggest that the hybrid alginate beads can be used as “smart” polysaccharide materials for sustained dual-responsive drug delivery.
研究领域:
生物材料
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药物递送系统
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高分子科学
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纳米医学
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药剂学
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生物化学
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组织工程
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高影响因子
DESALINATION
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2012
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IF 2.59
Lei Ling,Yuming Zhou,Jingyi Huang,Qingzhao Yao,Guangqing Liu,Peixin Zhang,Wei Sun,Wendao Wu
In an attempt to control Ca 3 (PO 4 ) 2 , CaCO 3 , and CaSO 4 deposits in industrial recycling water systems, an acrylic acid (AA)-allyloxy poly(ethylene glycol) polyglycerol carboxylate (APEG-PG-COOH) copolymer was synthesized as a nonphosphorus inhibitor. The synthesized polymer was characterized by 1 H NMR. The performance of PAA/APEG-PG-COOH on inhibition of Ca 3 (PO 4 ) 2 , CaCO 3 and CaSO 4 precipitation was studied through static scale inhibition tests. It was shown that PAA/APEG-PG-COOH exhibited excellent ability to control inorganic minerals, with approximately 100% CaSO 4 inhibition and 99.89% Ca 3 (PO 4 ) 2 inhibition at levels of 3 and 6 mg/L PAA/APEG-PG-COOH, respectively. PAA/APEG-PG-COOH also displayed ability to prevent the formation of CaCO 3 scales. The effects on formation of Ca 3 (PO 4 ) 2 , CaCO 3 and CaSO 4 were investigated with combination of Scanning electronic microscopy (SEM), Transmission electron microscopy (TEM), and X-ray powder diffraction (XRD) analysis, respectively.
研究领域:
环境化学
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材料科学
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工业水处理
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高分子化学
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腐蚀与防护
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矿物结垢控制
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高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
·
IF 4.6
Zixuan Tian,Jialing Jiang,Lei Wang,Songtao Dong,Jing Luan,Hongbo Ju
BiCuSeO has attracted significant interest in the field of thermoelectric materials due to its layered crystalline structure, along with advantages such as abundant elemental availability, low thermal conductivity, and outstanding thermal stability. However, the inherently low electrical conductivity of BiCuSeOlimiting overall thermoelectricperformance. To address this, as an effective strategy to enhance thermoelectric performance, BiCuSeO was subjected to tri-element co-doping. Bi 1−3x (CaSrBa) x CuSeO (x = 0.0, 0.02, 0.03, 0.04, and 0.05) ceramics were synthesized using an advanced fabrication process that combined high-energy ball milling with hot-press sintering techniques. Substituting Ca 2+ , Sr 2+ , and Ba 2+ at the Bi 3+ sites effectively optimized the carrier concentration, increased the effective mass, and significantly enhanced the electrical conductivity from 9.67 to 91.55 S cm −1 . Notably, the power factor of the Bi 0.88 (CaSrBa) 0.04 CuSeO sample reached 476.54 μW m −1 K −2 at 323 K. and electrical conductivity. Simultaneously, the introduction of lattice defects through co-doping considerably enhanced phonon scattering, reducing the lattice thermal conductivity to 0.342 W m −1 K −1 for Bi 0.85 (CaSrBa) 0.05 CuSeO, compared with 0.447 W m −1 K −1 for the pristine sample. Consequently, a maximum dimensionless figure of merit ( ZT ) of 0.65 was achieved at 773 K for Bi 0.88 (CaSrBa) 0.04 CuSeO. These findings provide valuable insights into improving the thermoelectric performance of BiCuSeO-based materials through multi-element co-doping.
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高影响因子
OPTICS LETTERS
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2025
·Vol. 50
·期 21
·6533-6536
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IF 3.3
Yu Zhang,Yu Zhang,Kai Li,Kai Li,Hala Muji,Hala Muji,Qixu Tian,Qixu Tian,Yuansong Gao,Yuansong Gao,Narimai J,Narimai J,Xinyu Gu,Xinyu Gu,Fengqi Zhao,Fengqi Zhao,Fengqi Zhao,Kefu Chao,Kefu Chao,Dengfeng Peng,Dengfeng Peng,Dengfeng Peng,Dengfeng Peng
In this study, a novel, to the best of our knowledge, Cr3+-doped garnet fluorescent material (Ca2TbScGa2Ge2O12:Cr3+, CTSGGO:Cr3+) in high-entropy oxides has been successfully synthesized by a high-temperature solid-phase method and systematically investigated in terms of its photoluminescence (PL) and mechanoluminescence (ML) properties. The material shows broadband near-infrared emission in the 700–900 nm range when excited by 460 nm blue light, with a half-peak width of 116 nm. Additionally, it achieves NIR-visible synergistic emission in both PL and ML modes through efficient energy transfer from Tb3+ to Cr3+ (with a transfer efficiency of 75%). When encapsulated in PDMS, the material exhibits dual ML responses: 450–650 nm (Tb3+) and 650–900 nm (Cr3+) under mechanical stress. It was integrated with commercial blue LED chips and PDMS for practical applications in night vision imaging, tissue penetration visualization, and multiple-mode optical anti-counterfeiting. This work offers new insights for designing broadband NIR-emitting materials and developing photoelectronic and force-responsive devices.
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 28
·58163-58170
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IF 5.6
Ning Guan,Junqi Chen,Huaicheng Xiang,Jie Li,Wei Sun,Yuandong Qin,Ying Tang,Liang Fang
In microwave communication, combining a high quality factor ( Q×f ; i.e., low dielectric loss) with a near-zero temperature coefficient of resonant frequency ( τ f ) remains a significant challenge. Here, we propose to enhance the structural stability of the rock-salt and perovskite layers in K 2 NiF 4 -type ceramics by using entropy engineering methods, thereby reducing dielectric loss and improving the temperature stability of the resonant frequency. Novel high-entropy ceramics Ca(Pr 0.2 Nd 0.2 Sm 0.2 Eu 0.2 Y 0.2 )AlO 4 with a K 2 NiF 4 structure have been synthesized via the solid-state reaction method. Excellent microwave dielectric properties with a low permittivity ( ε r ) of 19.4, a Q×f of 105,223 GHz, and a near-zero τ f of −6.23 ppm/°C were obtained at 1400 °C. A significant enhancement in the mechanical properties of Ca(Pr 0.2 Nd 0.2 Sm 0.2 Eu 0.2 Y 0.2 )AlO 4 ceramic was achieved due to the improvement of configuration entropy. Furthermore, a cylindrical dielectric resonator antenna (CDRA) was developed, showcasing a high simulated radiation efficiency of 93.9 % and a gain of 6.66 dBi at the center frequency of 3.25 GHz. This indicates that Ca(Pr 0.2 Nd 0.2 Sm 0.2 Eu 0.2 Y 0.2 )AlO 4 high-entropy ceramic holds promising applications in satellite communication due to its low dielectric loss.
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高影响因子
ISIJ INTERNATIONAL
·
2025
·
IF 1.8
Shiwei Lin,Xiao Yang
Steelmaking slag contains valuable components. Its high phosphorus content hinders its reutilization in the steelmaking process. This study proposes an efficient phosphate removal process using molten CaCl2 as the reaction medium, aiming to enable slag recycling and P recovery. Experimental results show that nearly all P-bearing phases in steelmaking slag are leached into molten CaCl2 under the tested conditions (850 to 1000 °C, slag/CaCl2 mass ratios 1:10 to 1:2.5). The leaching mechanism involves the reaction of slag's P-bearing phases with CaCl2 to form intermediates (Ca2PO4Cl and Ca3SiO4Cl2), which dissociate into PO43– and other ions in the melt. For other elements: Si(IV) leaches continuously but incompletely; Fe(II) and Mn(II) concentrations in the melt first increase then decrease, attributed to the evaporation of volatile FeCl2 and MnCl2; Mg and Al remain nearly unleachable. After leaching, adding carbon to the P-enriched melt achieves complete P(V) removal via carbothermal reduction. This molten CaCl2-based approach provides a sustainable alternative to conventional technologies, offering valuable insights for the comprehensive utilization of P-bearing solid wastes.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xingzhuo Xiong,Zihao Xu,Biao Xu,Chunyu Li,Wubin Dai
Borate-based phosphors have emerged as ideal host materials for near-ultraviolet ( n UV) pumped phosphor-converted white light-emitting diodes (pc- w LEDs) owing to their mild synthesis conditions, broad transparency window, and excellent chemical and thermal stability. Cubic Ba 3 Y 2 B 6 O 15 (BYB) features a highly symmetric lattice structure, providing stable binding sites for rare-earth ions. Its [YO 6 ] octahedral structure allows for controllable lattice distortion, making it an ideal host for multivalent rare-earth luminescent systems. In this study, Ce 3+ , Eu 3+ , Eu 2+ , and Ca 2+ co-doped BYB nanophosphors were prepared in an Ar atmosphere. The partial substitution of Ba 2+ by Ca 2+ promotes the generation of more oxygen vacancies, which in turn induces the self-reduction of Eu 3+ to Eu 2+ . The phosphor exhibits strong absorption characteristics at 365 nm. Acting as an efficient sensitizer, Ce 3+ can simultaneously transfer energy to Eu 2+ and Eu 3+ . By tuning the Ca 2+ content, the Eu 3+ /Eu 2+ ratio and the emission color can be continuously adjusted, achieving a smooth transition from blue-green to orange-red. This Ca 2+ mediated strategy stabilizes the coexistence of Eu 2+ and Eu 3+ , addressing the key limitations of traditional single-phase phosphors. It provides a novel approach for developing high-performance n UV-excited warm white phosphors and demonstrates potential for widespread application in highly efficient pc- w LED devices.
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高影响因子
Laser & Photonics Reviews
·
2026
·
IF 9.7
Siqi Zhang,Minnan Jiang,Haixia Zheng,Xinyu Liu,Li Li,Zhiyu Yang,Faling Ling,Yongjie Wang,Xianju Zhou
Trivalent iron (Fe 3+ ) has attracted extensive attention as an environmentally friendly and cost-effective near-infrared (NIR) emitting activator ion. However, its weak absorption in the blue-violet light region and relatively low internal quantum efficiency (IQE) have long constrained its practical applications. In this study, a series of Ca 3 Ga 2-x Sn 2 GeO 12 : xFe 3+ NIR phosphors with a cubic garnet structure was successfully synthesized via a high-temperature solid-state reaction method. Efficient NIR luminescence under long-wave ultraviolet (LWUV) chip excitation was observed, exhibiting broadband NIR emission centered at 740 nm. Remarkably, the phosphor achieves an internal quantum efficiency (IQE) as high as 82.3%, representing the highest efficiency reported to date for Fe 3+ -doped NIR phosphors under blue-violet light excitation. Temperature-dependent luminescence analysis reveals excellent thermal stability: the integrated emission intensity at 423 K retains 67.06% of its initial value at room temperature. A prototype NIR phosphor-converted LED (pc-LED) device fabricated with the studied phosphor and a commercial chip (400–410 nm) exhibits stable electroluminescence performance and good output power conversion. In summary, the Ca 3 Ga 2-x Sn 2 GeO 12 : xFe 3+ phosphor, with its efficient luminescence under blue-violet light excitation, outstanding thermal stability, and temperature-independent emission peak position, demonstrates significant application potential in the field of high-efficiency and high-stability NIR light sources.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yuan Sun,Jie Wu,Yue Zhang,Linjing Liu,Jinpeng Ma,Yulin Yang,Bin Yang
BaTiO 3 -based piezoelectric ceramics have emerged as highly promising candidates for various applications, due to their excellent piezoelectricity. In this work, the [001] C textured Ba 0.97 Ca 0.03 Ti 0.96 Sn 0.04 O 3 piezoelectric ceramics were synthesized using the templated grain growth (TGG) method with the assistance of ZnO and Li 2 O. The effects of ZnO and Li 2 O on microstructure evolution, phase structure, texture development and piezoelectric properties were investigated systematically. Both ZnO and Li 2 O exhibit a pronounced promoting effect on oriented BCTS grain growth, enabling the achievement of a high texture degree F 001 of 98% at a relatively low sintering temperature of 1325 °C. The highly textured BCTS ceramics with Li 2 O exhibit to a substantial enhancement in piezoelectric performance: maximum strain S m , the piezoelectric coefficient d 33 and the figure of merit d 33 · g 33 reach 0.25%, 576 pC/N and 28.7 × 10⁻¹ ² m²/N, respectively. The highly preferred [001] C orientation, coexistence of O + T phases, and optimized ferroelectric domain structure synergistically contribute to the significant piezoelectric property enhancement. These results demonstrate the great potential of environmentally friendly textured BCTS-based ceramics for applications in piezo-sensors and energy harvesters.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Zhuoqing An,Xiaolong Ni,Zhuang Ma,Yuan Gao,Jiajing Chen
To investigate the effects of La 2 O 3 and Fe 2 O 3 on the structure and high viscosity of the CaO-MgO-Al 2 O 3 -SiO 2 (CMAS) glass system, the microstructure was analyzed using in-situ high-temperature Raman spectroscopy, and the viscosity was measured by high temperature hot-stage. A series of cluster models representing aluminosilicate systems modified by La and Fe ions were constructed, followed by geometric optimization and Raman spectral simulation via quantum chemistry ab initio calculations. The results indicates that the effects of La 2 O 3 and Fe 2 O 3 on both vibrational wavenumber and Raman scattering cross-section (RSCS) followed the order: La < (La + Fe) < Fe. The addition of La 2 O 3 and Fe 2 O 3 loose the glass network structure, and led to a progressive rise in the relative content of Q 0 , Q 1 , and Q 2 units, accompanied by a notable decrease in Q 3 and Q 4 units. Consequently, the high viscosity and viscous flow activation energy decrease with the addition of La 2 O 3 and Fe 2 O 3 , but Fe 2 O 3 has a more pronounced effect. Furthermore, based on the NBO/T for characterizing the microstructure, the relationship between viscosity and microstructure is quantitatively analyzed.
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