JOURNAL OF POROUS MATERIALS
·
2024
·Vol. 31
·期 2
·673-684
·
IF 2.5
Zhao Dongliang,Zhou Peng,Li Xiangzhou,Song Ke
Mesoporous carbon has become a research hot spot due to its excellent properties and broad application prospects. In this study, mesoporous carbon was synthesized simply by carbonizing a composite of chitosan (CS) and nano-barium carbonate, taking advantage of the excellent flocculability of CS. The structure and morphology of chitosan-based mesoporous carbon (CSMC) were characterized using BET, SEM, FT-IR, XRD, XPS and Raman techniques. The results revealed that CSMC possessed a graphitic and diamond-like structure consisting of C (92.8%), O (6.9%) and N (0.3%). The mass ratio of BaCO 3 /CS played an important role in pore formation, with CSMC5 exhibiting a specific surface area and mesoporous surface area up to 2211 and 1119 m 2 /g, respectively. The adsorption performance of CSMC was tested with chlorogenic acid (CA) as the adsorption object. The saturated adsorption capacity of CSMC for CA was up to 742.52 mg/g and the adsorption rate was rapid. The adsorption behavior of CA by CSMC conformed to Langmuir isothermal adsorption model and pseudo-second-order kinetic model. Thermodynamic parameters indicated that the adsorption of CA by CSMC was exothermic and reversible. This study provides a promising approach for the synthesis of chitosan-based mesoporous carbon materials and potential applications in sustainable technologies.
研究领域:
材料科学
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环境科学
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化学工程
·
纳米技术
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Mingfei Yu,Xiangyu Kong,Jianhui Luo,Hanqiang Zhou,Yanxin Gao,Chenghui Zheng,Qiaoshan Chen,Jinhong Bi
The semiconductor-insulator heterostructure, characterized by outstanding economic-efficiency and catalytic activity, represents a promising photocatalyst for practical pollutants degradation. However, achieving energy band matching between semiconductors and insulators remains a challenge. In this study, we meticulously designed and synthesized a band-matched semiconductor-insulator photocatalysts (AgI-BaCO 3 ), leveraging the in-situ nucleation of ultrafine AgI nanoparticles on BaCO 3 surface. The finely crafted heterostructure notably enhanced degradation efficiency of tetracycline over both pure AgI and BaCO 3 , demonstrating a remarkable pseudo-first-order kinetic rate constant that surpassed them by 27.2 and 33.5 times, respectively. The density functional theory calculations uncovered that the intense covalent interaction between AgI and BaCO 3 established a specific channel for interfacial charge carriers. The generated CO 3 ·- radicals as the main active species markedly expedited the removal of antibiotics. Furthermore, the catalysts demonstrated robust activity in real wastewater and surface water. This work supplies a novel reference for constructing insulator-based photocatalysts and elucidates its potential application in actual aquatic environments.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Minerals
·
2018
·Vol. 8
·期 7
·296
·
IF 1.835
Jing Ouyang,Dawei Mu,Yi Zhang,Huaming Yang,Steven L. Suib
Barium carbonate (BaCO3) materials with the controllable morphology of nanoparticles were selectively loaded into the lumen halloysite nanotubes (abbreviated as Hal) by a urease assisted catalytic implementation strategy. The Hal mineral was pre-treated through leaching by hydrochloric acid (abbreviated as A-Hal), resulting in increased defect sites and zeta potential. The negatively charged urease was loaded inside the positively charged A-Hal lumen, and then through the decomposition of urea catalyzed by urease to produce carbonate ions and ammonia. When Ba2+diffused in, BaCO3particles were selectively synthesized in the lumen of A-Hal, the pore channels of A-Hal effectively controlled the growth and aggregation of BaCO3nanocrystals and their geometrical morphology. The obtained BaCO3/A-Hal-T was characterized by transmission electron microscopy, Fourier transformation infrared spectroscopy and X-ray diffraction, differential scanning calorimetry-thermogravimetry (DSC-TG). The BaCO3/A-Hal-T may provide a candidate for potential applications.Keywords:halloysite;urease;barium carbonate;selective decoration;nanoreactors
研究领域:
材料科学
·
生物催化
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产品关联
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2019
·
IF 4.153
Wei Zhang,Fengzhen Zhang,Liping Ma,Jie Yang,Jing Yang,Huaping Xiang
For the complex reactive crystallization system of barium carbonate in industrial processes, the crystal size distribution (CSD) is an important factor for high-quality products and determines the efficiency of many downstream operations. Therefore, CSD prediction based on the mechanism model of the reactive crystallization process of barium carbonate is investigated in this work. The dynamic variation of the whole CSD was reconstructed during the growth and nucleation processes of barium carbonate by solving the population balance equations (PBEs) using combination of the method of characteristics (MOCH) with the quadrature method of moments (QMOM). The parameters of crystal nucleation and size-dependent growth model are identified by capturing real-time laboratory experimental data with process analytical technologies (PATs). Meanwhile, the optimal operating conditions for barium carbonate reactive crystallization processes can be determined, and an optimization approach is used to obtain the target CSD at the end of a batch crystallization process. The computational process is evaluated by experimentations and found that experimental CSDs agree with the simulated values. For complicated reactive crystallization processes with supersaturation controlled, the operating conditions influencing the dynamics of this evolution of CSD can be determined for offline crystallization design and online prediction and control.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Guokun Yang,Tianle Liu,Bo Qu,Shaojun Zheng,Zihan Zhang,Guosheng Jiang,Shitian Zhao,Shichen Wang,Changliang Fang
Microencapsulated phase change materials (MPCMs) have gained widespread application in energy-efficient buildings, aiming to improve thermal comfort and reduce energy consumption. To enhance the engineering feasibility of MPCMs, researchers are now focusing on developing MPCMs with multifunctional properties, beyond single thermal storage functionality. In this study, we proposed a novel and straightforward approach to fabricate multifunctional MPCMs with BaCO 3 as shell and a core composed of binary phase change materials (PCMs) and lipophilic-modified graphite (MG) via self-assembly method. The incorporation of BaCO 3 shell provides MPCMs with additional resistance to ionizing radiation pollution due to the high atomic number element Ba. Additionally, the incorporation of MG into PCMs enhances its temperature sensitivity. The thermal analysis indicates that the binary PCMs’ composition in MPCMs results in two phase transition temperatures at 3.3 °C and 26.4 °C, making them capable of thermal storage in line with comfortable residential temperatures across different seasons. Furthermore, MPCMs were introduced into cement paste (CPM) and used to construct cement chambers. Adding 10 wt% MPCMs in the CPM chambers placed outdoors in Wuhan (from June 7th to June 9th) led to a 23.8 % decrease in temperature fluctuations compared to the reference sample. Radiation shielding results indicated that the linear attenuation coefficient (μ) of CPM increased by 58.7 %, due to enhanced incoherent scattering and photoelectric effects between high atomic number elements and photons. Additionally, XCOM simulations predicted a strong correlation between MPCM content and μ values, with particularly high accuracy at low photon energies. Overall, the multifunctional MPCMs developed in this study not only offers a new route for reducing residential energy consumption and shielding ionizing pollution, but also broadens the applicability of traditional PCMs in the building and other fields.
研究领域:
材料科学
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建筑技术
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能源工程
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辐射物理
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产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Bin Liu,Kaili Chu,Panpan Lan,Cui Zhou,Jialin Li,Qingqiao Fu,Wenxian Li,Luchao Sun,Jingyang Wang
Tungstate, with the molecular formula AWO 4 , has attracted widespread attention due to its outstanding applications in various fields. Ba 1- x Sr x WO 4 ( x = 0, 0.2, 0.4, 0.6, and 0.8) ceramics with a single-phase scheelite structure are synthesized by the conventional solid phase reaction method. Their structural stability, micromorphology, and element distribution, thermal and mechanical properties are systematically investigated. The experimental thermal conductivity of all samples is 0.852–1.056 W·m −1 ·K −1 at 1173.15 K. An outstanding advantage of Ba 1- x Sr x WO 4 ceramics is that the coefficient of thermal expansion increases from 7.71 × 10 −6 K −1 ( x = 0) to 10.31 × 10 −6 K −1 ( x = 0.8) at 1173 K, indicating that the doping of Sr ion reduces the system energy during the lattice relaxation process and significantly improves the coefficient of thermal expansion. The thermal conductivity of Ba 1- x Sr x WO 4 ceramics is significantly lower than that of most low thermal conductivity candidate materials, such as Y 2 SiO 5 , SrZrO 3 , and La 2 Zr 2 O 7 . This study lays a foundation for the design of BaWO 4 scheelites with excellent thermal properties, which have high practical application value in the field of thermoelectric conversion and thermal protection.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 34
·2170
·
IF 2.8
Wang Yan,Su Congxue,Tao Wenlong,Chen Zelong,Fan Jun,Cheng Min,Chen Beiyi,Zhou Huanfu,Sun Yuan
In light of advancements in 5G/6G technologies, current research on microwave dielectric ceramics is focused on the development of materials characterized by low sintering temperatures and low permittivity, in order to satisfy the requirements of high-frequency low-temperature co-fired ceramic (LTCC) applications. Novel monoclinic structure GdBaK(MoO 4 ) 3 and YBaK(MoO 4 ) 3 ceramics, with C2 / c space group, were synthesized using a conventional solid-state method. GdBaK(MoO 4 ) 3 and YBaK(MoO 4 ) 3 ceramics were sintered at 830 °C and 850 °C, exhibited ε r ~ 8.54 and 8.77, τ f ~ − 51.1 ppm/°C and − 45.8 ppm/°C, Q × f ~ 23, 240 GHz and 59, 277 GHz, respectively. The compression from Ba 2+ and K + cations was identified as the main reason for the higher theoretical ε theo compared to the corrected ε corr . The dielectric loss of both ceramics is mainly affected by the density and packing fraction. The full width at half maximum (FWHM) values of the vibrational peak at 932 cm −1 , corresponding to the symmetric stretching modes of MoO 4 2− , exhibits a negative correlation with the Q × f values. Based on the P–V–L theory, the lattice energy and bond energy associated with the Mo–O bond played a substantial role in influencing the Q × f and τ f . Moreover, YBaK(MoO 4 ) 3 showed good chemical compatibility with Ag, indicating its potential for LTCC applications.
研究领域:
材料科学
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陶瓷与复合材料
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微波技术
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介电材料
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电子材料
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固态化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yongqiang Wang,Jun Yang,Langsheng Ling,Lei Zhang,Zhe Qu,Li Pi,Bing Li,Tiantian Cui,Xiangyue Liu,Hong Ge,Shile Zhang,Wei Tong
We report here the mutual control of magnetism and ferroelectricity in Cr-doped Y-type hexaferrite Ba 0.5 Sr 1.5 Zn 2 Fe 12 O 22 single crystal (Ba 0.5 Sr 1.5 Zn 2 Fe 12-x Cr x O 22 , x = 0.2). The direct magnetoelectric effect persists up to 70 K, with a maximal magnetoelectric susceptibility of ∼2950 ps/m at 10 K, which is nine times larger than that of the Cr-doped polycrystal (∼315 ps/m, 10 K). Notably, magnetic-field-driven polarization reversal is observed at low temperatures, accompanied by a non-zero remanent polarization at zero field. Furthermore, the magnetization can be linearly modulated by an external electric field under an applied bias magnetic field. The largest relative change in magnetization occurs at a bias field of 0.01 T. As the magnetic field increases, the relative change in magnetization gradually decreases. Even when the bias magnetic field reaches 0.06 T, the external electric field can still modulate the magnetization, demonstrating its potential for magnetoelectric applications in complex magnetic environments. These findings reveal that Cr-doped Y-type hexaferrites are promising candidates for bidirectional magnetoelectric coupling, offering pathways for advanced multiferroic memory and sensing technologies.
研究领域:
凝聚态物理
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多铁性与磁电材料
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材料科学
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功能材料
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Feng Du,Xinyi Zhang,Wanyu Zhao,Zehua Xue,Xiyuan Zhang,Zuobin Tang
The development of emission-tunable phosphors is crucial for advancing high-performance phosphor-converted white light-emitting diodes (PC-WLEDs). Here, we report a novel aluminates blue phosphor, Sr2LaAlO5:Bi3+, which exhibits a peak emission wavelength of 448 nm under ultraviolet excitation. Structural and spectroscopic studies indicate the presence of multiple luminescent centers in Sr2LaAlO5:Bi3+. Using the cation-equivalent substitution strategy, we further constructed a series of solid-solutions, Sr2–yBayLaAlO5:Bi3+ (0 ≤ y ≤ 2), and achieved continuous emission tuning from blue (448 nm) to cyan-green (494 nm) via Ba2+ substitution. Rietveld refinements of XRD data demonstrate that Ba2+ preferentially occupies the Sr2O10 site with a large coordination number, inducing a consequent red-shift in the emission spectra. The red-shift is rationalized by the synergistic effects of crystal field splitting, Stokes shift, and the nephelauxetic effect. By integrating the blue phosphor Sr2LaAlO5:0.03 Bi3+, the cyan-green phosphor Ba2LaAlO5:0.03 Bi3+, and the red phosphor CaAlSiN3:Eu2+ on a 360 nm LED chip, a pc-WLED with high brightness, an outstanding color rendering index, and a low correlated color temperature was demonstrated. This study offers valuable design insights into modulating the host lattice coordination environment to achieve tunable luminescent colors in Bi3+-doped phosphors.
研究领域:
材料科学
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无机化学
·
发光材料
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固体物理
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光电子学
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产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Mingtao Zhu,Hao Hu,Hongjian Zhang,Tian Zhang,Yong Zhang
With increasing global concerns about energy efficiency and environmental protection, conventional refrigeration technologies face significant challenges. The electrocaloric effect (ECE), as a solid-state and eco-friendly refrigeration technology, has emerged as a research hotspot for next-generation cooling solutions due to its performance controllability and broad applicability. A critical challenge lies in developing materials that exhibit large temperature change under low electric field. In this study, we designed a flexible composite film with remarkable electrocaloric capability by integrating BSZT-based relaxor ferroelectric fillers into a ternary copolymer matrix P(VDF-TrFE-CFE). Experimental results demonstrate that the incorporation of BSZT fillers significantly enhances the dielectric response and polarization intensity of the composites through interfacial polarization effect . Under a moderate electric field of 75 MV/m, the composite achieves a prominent adiabatic temperature change of 11.2 K, which is ∼2.7 times of the pure polymer matrix (ΔT = 4.09 K). This work provides a novel material solution for green refrigeration technology, particularly promising for applications in portable and wearable devices .
研究领域:
材料科学
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固体物理
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能量转换技术
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制冷技术
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聚合物复合材料
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Zhanghong Shi,Yuanbao Liu,Jinfan Chen,Qingkai Zhao,Hang Yang,Shun Li,Min Pang,Hexiang Huang,Dongwen Wang,Changan Chen
BaCe 0.9-x In x Gd 0.1 O 3-δ (where x = 0.1, 0.2, 0.3, 0.4) electrolytes were successfully synthesized via the solid-state reaction (SSR) method. The structure was analyzed through X-ray diffraction (XRD), scanning electron microscopy (SEM), and XRD refinement techniques. The oxidation states of cerium and the presence of oxygen vacancies were investigated with X-ray photoelectron spectroscopy (XPS). Electrical conductivity was evaluated using electrochemical impedance measurements conducted over a temperature range of 500 °C–650 °C in various atmospheres. The electrical properties demonstrate that BaCe 0.6 In 0.3 Gd 0.1 O 3-δ exhibits outstanding performance. XRD, SEM, and cell refinement confirm that BaCe 0.6 In 0.3 Gd 0.1 O 3-δ exhibits a cubic perovskite structure within the space group Pm-3m, with relative densities exceeding 97 % and showing remarkable chemical stability for 108 days in air. The highest conductivity of BaCe 0.6 In 0.3 Gd 0.1 O 3-δ , recorded at 7.24 mS cm −1 in dry hydrogen at 600 °C, establishes it as a promising alternative for solid oxide fuel cell (SOFC) electrolytes, particularly for lowering operating temperatures.
研究领域:
材料科学
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电化学
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能源材料
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陶瓷
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燃料电池
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 33
·2137
·
IF 2.8
Zeng Fanjun,Meng Liufang,Yuan Changlai,Zhu Baohua,Liu Xiao,Xiao Hequn,Wu Jianwang,Zhou Changrong,Chen Guohua
With the rapid development of 5G communication technology, higher requirements have been imposed on microwave dielectric ceramic materials. Ceramic materials with low dielectric constant, excellent temperature stability, and low sintering temperature have become current research focus. In this study, (1- x )Li 2 MoO 4 - x BaV 2 O 6 (LM- x BV, x = 0.7, 0.78, 0.8, 0.9) ceramics were successfully prepared via the solid-state reaction method, and their microstructures, microwave dielectric properties and antenna simulation were investigated. XRD and Raman spectroscopy confirmed the coexistence of BaV 2 O 6 , BaMoO 4 and LiVO 3 phases in all LM-BV systems. Bulk density, Q × f and τ f values approximately increased, and ε r decreased, with BV contents increased at optimum sintering temperature. LM-0.8BV ceramic was obtained with excellent microwave dielectric properties of ε r = 9.32, Q × f = 11246.3 GHz and τ f = 2.8 ppm/ ℃. The DRA designed based on Li 2 MoO 4 -0.8BaV 2 O 6 ceramics demonstrated excellent performance at 7.88 GHz, including a return loss of ~ -33.51 dB, high efficiency (~ 95%), a peak gain of ~ 7.3 dB, and a bandwidth of 500 MHz. These results indicated that the material had promising potential for applications in microwave devices within Low-Temperature Co-fired Ceramic (LTCC) technology.
研究领域:
材料科学
·
微波工程
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陶瓷材料
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5G通信技术
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天线设计
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）