INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2013
·Vol. 38
·期 25
·10191-10195
·
IF 3.548
Zhuobin Yu,Qiang Zhao,Genyan Hao,Wen Yuan,Jinping Li
A weakly acidic H 3 BO 3 solution (pH = 5.1) was used to synthesize new oxygen-evolution catalysts for water splitting under mild conditions. Two novel oxygen-evolution catalysts, Co–BA i and Mn–BA i (BA i = inorganic boric acid), were obtained in the H 3 BO 3 solution with added Co 2+ and Mn 2+ , respectively. The average oxygen evolution rate in the H 3 BO 3 solution with Co 2+ was 0.3133 μmol/h, about 70 times greater than the rate without a metal ion ; the rate with Mn 2+ was 1.13 μmol/h, about 250 times greater. The phases, morphologies, and compositions of the Co–BA i and Mn–BA i catalysts were analysed by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy .
研究领域:
材料化学
·
电催化
·
能源科学
·
无机化学
·
可持续能源技术
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Ziyu Zhuang,Dongdong Li,Jinshun Lei,Dandan Gao,Dewen Zeng
Highly concentrated boron is widespread in salt lake brine and nuclear wastewater. Treatment of these aqueous solutions involves the solubility of extensive boron-containing minerals. Recently, we concentrated on the temperature-dependent solubility of the H3BO3 + salt + water system. Here, we systematically determined the ternary solubility isotherms in the H3BO3 + RbCl + H2O and H3BO3 + NH4Cl + H2O systems at T = (273.15, 298.15, 323.15, 348.15 and 363.15) K, using an isothermal equilibrium method. The results showed that both ternary systems belonged to a simple eutectic case. The solubility isotherms consisted of the solubility branches of H3BO3(cr) and RbCl(cr) or NH4Cl(cr). Using a revised Pitzer–Simonson–Clegg (rPSC) model implemented in the ISLEC software, these ternary solubility data were represented by fitting the interaction parameters between H3BO3 and RbCl and H3BO3 and NH4Cl. With the help of these models, polythermal phase diagrams of the two ternary systems are predicted.
研究领域:
化学
·
环境科学
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DOI
高影响因子
COMBUSTION EXPLOSION AND SHOCK WAVES
·
2017
·Vol. 53
·期 1
·55-64
·
IF 0.889
Liu J.,Liang D.,Xiao J.,Chen B.,Zhang Ya.,Zhou J.,Cen K.
Primary combustion products of boron-based propellants are incomplete combustion products that are emitted from the gas generator of a solid ducted rocket. Studying the composition of primary combustion products provides valuable information about the primary combustion process and also helps to better understand the secondary combustion process. The particle size of the primary combustion products is analyzed by a laser particle size analyzer. The qualitative analysis of the sample composition is performed by using x-ray diffraction, x-ray photoelectron spectroscopy, and thermogravimetry–differential scanning calorimetry experiments. Based on these results, an integrated quantitative analysis of the sample composition is conducted. The quantitative analysis methods include tube furnace heating, ion chromatography, infrared spectroscopy, and inductively coupled plasma chromatography. In addition, scanning electron microscopy and energy dispersive spectrometry are also used to analyze the micro-morphology and distribution of different components in the sample. The primary combustion products mainly contain B, C, B
m
C
n
, H 3 BO 3 , B 2 O 3 , BN, Mg, MgCl 2 , and NH 4 Cl. B
m
C
n
(22–24%), H 3 BO 3 (20%), and B (16.8%) are the three major components, while B
m
C
n
, B, and C (9.8–11.8%) are the three combustible components present in the highest amounts. The oxidant NH 4 ClO 4 is completely consumed during the primary combustion, while the metal additive Mg does not show much reactivity. The micro-morphology and distribution of B
m
C
n
, H 3 BO 3 (or B 2 O 3 ), B, Mg, and C in the sample are investigated. Some components in the primary combustion products are found to be agglomerated, while some components are dispersed. Large particles in the sample mainly include B and Mg, while B
m
C
n
, H 3 BO 3 (or B 2 O 3 ), and C particles are small. In general, the combustion completeness of the primary combustion products is rather low. Therefore, better understanding and controlling of the secondary combustion process is very important to improve the performance of B-based propellants.
研究领域:
化学工程
·
航空航天工程
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DOI
高影响因子
POWDER TECHNOLOGY
·
2019
·
IF 3.413
Junqiang Zhang,Xuzhong Gong,Zhi Wang,Junhao Liu,Yanguang Chen,Dong Wang,Guoyu Qian,Chuan Wang
Various factors affecting the high temperature compressive strength (TCS) for the carbide slag-based CaO pellets were systematically examined both experimentally and theoretically. It showed that the spherical CaO particles with microstructure can enhance the TCS of the pellets, and the higher the spheroidization of the particles, the higher the TCS. Inducing H 3 BO 3 can lead to a low-temperature nucleation of CaO particle, inhibit the growth of CaO grain, and thus form spherical CaO particles. The TCS of CaO pellet from Ca(OH) 2 was optimized with the response surface methodology with a highest value of 37.4 MPa. For the CaO pellet from the carbide slag, the TCS under optimal conditions was 39.67 MPa. However, it was found out that an excess of H 3 BO 3 inducer in the CaO pellets from the carbide slag could produce eutectic calcium borate with a low melting point, resulting in a decreased TCS.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2021
·Vol. 104
·期 9
·4304-4308
·
IF 3.784
Shuixian Yang,Jianmin Li,Hao Guo,Xiaojian Mao,Run Tian,Jian Zhang,Shiwei Wang
In this study, highly transparent aluminate oxynitride (AlON) ceramics were prepared via the reactive sintering of Al 2 O 3 and AlN powders using a Y 2 O 3 -MgAl 2 O 4 -H 3 BO 3 ternary sintering additive. The ternary doping process resulted in the efficient preparation of transparent AlON ceramics with small grains and high transmittance as compared to the binary doping (Y 2 O 3 -MgAl 2 O 4 ) process. The addition of 0.1 wt.% Y 2 O 3 -0.4 wt.% MgAl 2 O 4 -0.12 wt.% H 3 BO 3 resulted in the formation of a 4-mm-thick AlON ceramic with high transmittance (81% at 600 nm) and low haze (3.46%). This is the best performance in terms of the thickness and transmittance reported for AlON transparent ceramics prepared by the reactive sintering method.
研究领域:
材料科学
·
陶瓷
·
光学材料
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Liupeng Pan,Shunli Liu,Xiaolu Zhang,Olayinka Oderinde,Fang Yao,Guodong Fu
We report a kind of dopant (Eu 2+ ) and co-dopant (Dy 3+ ) co-doped strontium magnesium silicate phosphor synthesized via microwave irradiation in a weak reductive atmosphere of active carbon. X-ray diffraction (XRD) patterns illustrated that the samples were nearly pure Sr 2 MgSi 2 O 7 phase, in which the Sr 2 MgSi 2 O 7 host phase has the maximum fraction of tetragonal crystallography Sr 2 MgSi 2 O 7 phase. A series of long afterglow luminescent materials were synthesized to investigate the best synthetic conditions. The results showed that the optimal concentration of H 3 BO 3 and the best sintering time were 5 wt% and 30 min, respectively. The phosphors made from the microwave irradiation method demonstrated excellent luminescence performance and the microwave irradiation method provide a strategy for the synthesis of other alkali earth aluminate and silicate, or other luminescent materials.
研究领域:
材料科学
·
发光材料
·
合成方法
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产品关联
DOI
高影响因子
Molecular Catalysis
·
2023
·
IF 4.6
Yao Zhang,Fengxin Cao,Wenjing Wang,Yan Zhang,Zhikang Yang,Qiaoling Li,Chengcheng Yu
Hydrogen is a vital clean energy, and reducing overpotential in hydrogen evolution has become necessary research, in which CoMo bimetal material is a promising high-efficiency hydrogen evolution material. In this study, boron was added to MoCo bimetallic ion catalysts with carbon cloth and copper foil substrates, and it was found that adding boron could significantly reduce the hydrogen evolution overpotential of the catalysts. The morphology analysis by SEM showed that the addition of boric acid in the electrolyte could change the morphology of the catalyst, making the surface of the catalyst smooth and uniform distribution on the carrier, while the surface of the catalyst without boric acid formed agglutination. The prepared CoMoB-CC catalyst has an overpotential of 44.1 mV when the current density is -10 mA·cm −2 . This paper primarily presents interesting phenomenon of the smooth effect of boric acid on the catalytic electrode, and the prepared catalyst has good catalytic performance, which provides some help for the preparation of hydrogen evolution materials.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2026
·
IF 2.8
Shi Xiaofei,Wang Xi,Zheng Xinzhu,Wang Lei,Tang Xiaoli,Su Hua,Lizhong Song
Ca 2+ -doped Co 1.1 ZnTiO 4 ceramics (0 ≤ x ≤ 0.08) were successfully synthesized via the conventional solid-state reaction route to investigate the doping effects of Ca 2+ on their microwave dielectric properties. X-ray diffraction (XRD) results revealed a distinct crystal structure evolution: a single-phase spinel structure with the Fd-3m space group was maintained at x ≤ 0.04, while the CaTiO 3 secondary phase precipitated at x ≥ 0.06 due to the finite solid solubility of Ca 2+ in the matrix lattice. The optimal comprehensive dielectric performance was achieved at x = 0.04 sintered at 1175°C, achieving Q × f = 73,300 GHz, ε r = 21.46, and τ f = −17 ppm/°C. Notably, H 3 BO 3 addition enabled a 275°C reduction in sintering temperature (down to 900°C) while retaining phase purity, which was fully confirmed by XRD analysis. Scanning electron microscopy (SEM) results verified improved bulk densification (relative density > 93%) and uniform microstructures with a homogeneous grain size of approximately 2.5 μm. Raman spectroscopy further indicated obvious [TiO 6 ] octahedral distortion, and a redshift of the A 1g mode from 720 to 715 cm −1 directly demonstrated lattice expansion after cation doping. The low-temperature-sintered samples at 900°C still exhibited competitive microwave dielectric properties ( Q × f = 30,900 GHz, ε r = 20.21, τ f = −18 ppm/°C), which strongly confirms that H 3 BO 3 serves as an efficient low-temperature sintering aid for the as-prepared titanate ceramics.
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高影响因子
DESALINATION
·
2024
·
IF 8.3
Ruzhen Zhao,Manxing Huo,Qifeng Wei,Xiulian Ren,Yongming Zhu
Efficient extraction of lithium and boron resources from salt-lakes is a prominent topic of research among scholars. In this study, a process route for the simultaneous extraction of lithium and boric acid was employed, followed by their separation through stepwise stripping. During the experiments, a coupling effect in the extraction of Li + and H 3 BO 3 was found, leading to an in-depth investigation of their mutual promotion mechanisms. Three significant patterns have been clearly verified through experiments, molecular dynamics simulations and quantum chemical calculations: First, the acidic extractant N221 can not only extract Li + , but also enhance the extraction of H 3 BO 3 ; Second, mono-fatty alcohol R-OH as dilute can effectively extract H 3 BO 3 while also promoting the extraction of Li + . Lastly, Li + and H 3 BO 3 can mutually promote each other's extraction. Using the Qinghai old brine, N221 system achieved a 99 % extraction efficiency for H 3 BO 3 , with an initial lithium extraction of 97 %, around 80 % in subsequent rounds. This paper proposes an effective method for the extraction of Li + and boric acid, and thoroughly studied the mechanism of their mutual promotion of extraction. This research offers new insights into the comprehensive utilization of salt-lake resources.
研究领域:
化学工程
·
材料科学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 5.6
Shoubo Wang,Qi Chu,Ruihan Wang,Yaqi Wang,Dongwei Zhai,Lifeng Cao,Haitao Wu,Bing Teng
The H 3 BO 3 added CaAlB 2 O 5.5 ceramics were prepared by solid-state method. Their thermal behavior, phase composition, microstructures, and dielectric properties across both microwave and terahertz frequency ranges were systematically characterized, with a particular focus on exploring their terahertz response. Ceramic samples with the composition CaAlB 2 O 5.5 + x wt% H 3 BO 3 (where x = 0, 2, 4, and 6) were synthesized using solid-state reactions and sintered at temperatures between 940 °C and 1060 °C. With 4 wt% of H 3 BO 3 , the sample shows the lowest secondary phase content and the highest relative density. Whereas, the sample sintered at 980 °C exhibited the best microwave dielectric properties: ε r = 5.8 ± 0.05, Q × f = 41372 ± 1100 GHz (@11.45 GHz), and τ f = -28 ± 2 ppm/°C, as well as an excellent terahertz dielectric property with Q × f = 4.726 × 10 8 GHz (@ 3.14 THz). By careful calculation with DFT, the Debye-Lorentz fitting reveals that lattice polarization and phonon damping dominantly govern the dielectric response from microwave to terahertz frequencies. Finally, the microstrip patch antenna fabricated on the optimized CaAlB 2 O 5.5 ceramic substrate exhibited a peak gain of 6.4 dB and a low return loss (S 11 = -33.72 dB) at a center frequency of 4.86 GHz. CaAlB 2 O 5.5 ceramics deliver high-quality microwave to terahertz dielectric performance and are promising candidates for microwave and terahertz applications.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yue Zhong,Jing Xie,Chao Wang,Tao Su,Yang Li,Wenming Wang,Yan Pan,Xiantao Wei,Yong Li
The advancement of modern artificial plant cultivation necessitates the development of high-performance far-red-light sources precisely tailored to plant spectral absorption profiles, which is crucial for enhancing crop yield and quality in contemporary agricultural practices. In this study, a cation substitution strategy was implemented by replacing Ba 2+ ions with smaller Ca 2+ cations to induce unit cell contraction. This structural modification reduces the degree of distorted octahedral coordination available for Mn 4+ substitution, effectively suppressing non-radiative transitions. As a result, the optimized phosphor exhibits a threefold enhancement in emission intensity along with significantly improved thermal stability. Furthermore, the incorporation of H 3 BO 3 as a flux agent enhanced crystallinity, synergistically boosting both luminescent performance and thermal stability. The resultant Mn 4+ -activated phosphor achieves a quantum efficiency of 81.2 % with characteristic far-red emission peaking at 708 nm. Fabricated far-red phosphor-converted light-emitting diodes and photoconversion films incorporating this phosphor demonstrate exceptional potential for precision-controlled plant growth modulation.
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产品关联
DOI
高影响因子
Journal of Materiomics
·
2025
·
IF 9.6
Zhan Zeng,Jin Cheng,Xinwei Xu,Hongye Wang,Yani Lu,Liang Sun,Naichao Chen,Xiaoyu Li,Boshen Zhang,Hong Wang
As electronic devices become increasingly miniaturized and demand greater integration, traditional packaging technologies face substantial challenges in meeting the needs for high-frequency performance and system reliability. Ceramic materials, known for their excellent dielectric properties and thermal stability, are promising candidates for advanced packaging applications. However, conventional high-temperature densification processes, which often exceed 1000 °C, restrict their compatibility with temperature-sensitive components in modern electronic systems. To overcome this limitation, we propose a novel approach to densify Al 2 O 3 -H 3 BO 3 ceramic at room temperature under low uniaxial stress. It is found that a H 3 BO 3 facilitates plastic deformation in the medium of deionized water, enhancing the densification of Al 2 O 3 -H 3 BO 3 ceramics even at minimal uniaxial stress. The resulting material exhibits a high relative density of over 96% and possesses excellent microwave dielectric properties (relative permittivity : 2.84–5.37; values: 12,924–69,000 GHz; resonant frequency values: −156.94 10 –6 ·°C –1 to −73.42 10 –6 ·°C –1 ) and thermal conductivity ( values: 1.96–5.96 W·m –1 ·K –1 ). After co-firing with a silicon wafer, the ceramic maintains its structural integrity, with no observable atomic diffusion at the ceramic-silicon interface, rendering it a potential candidate for advanced packaging and integration technologies.
研究领域:
材料科学
·
电子工程
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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）