CRYSTAL GROWTH & DESIGN
·
2021
·
IF 4.076
Yunqiao Guo,Die Zhang,Ting Zheng,Ling Huang,Daojiang Gao,Jian Bi,Guohong Zou
Two new alkali metal formic-borates named Rb3(COOH)3(H3BO3)2 and Cs3(COOH)3(H3BO3)2 have been successfully synthesized under mild conditions. Influenced by the different cation sizes, these two stoichiometrically equivalent compounds reveal discrepant symmetries: Rb3(COOH)3(H3BO3)2 is noncentrosymmetric (NCS) while Cs3(COOH)3(H3BO3)2 is centrosymmetric (CS). Especially, these two title compounds exhibit unique planar [(COOH)3(H3BO3)2]3– layers constructed from two kinds of planar π-conjugated asymmetric BO3 and COOH units, which induce the large birefringence, 0.09@1064 nm for Rb3(COOH)3(H3BO3)2 and 0.10@1064 nm for Cs3(COOH)3(H3BO3)2, respectively. Optical property measurements indicate that these two compounds display short UV absorption edges, suggesting that they are promising short-wave UV birefringent materials. A detailed theoretical analysis confirmed that the excellent linear optical property was derived from the synergistic effect of the two kinds of π-conjugated planar groups.
研究领域:
材料科学
·
光学
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2016
·
IF 2.101
Renping Cao,Guo Chen,Xiaoguang Yu,Pengjie Tang,Zhiyang Luo,Siling Guo,Guotai Zheng
Ca [1−3x/2] TiO 3 :xSm 3+ (0 ≤ x ≤ 5 mol%), Ca 0.955 TiO 3 :0.03Sm 3+ + 10 mol% H 3 BO 3 , Ca 0.94 TiO 3 :0.03Sm 3+ , 0.03Na + phosphors are synthesized by high temperature solid–state reaction method in air. All samples are pure phase CaTiO 3 . Two strong excitation bands within the range 400–435 nm and 455–510 nm are observed, which are nicely match with widely applied near-UV (400–430 nm) and blue (460–500 nm) LED chips. The strongest emission band peaking at ∼603 nm is assigned to the 4 G 5/2 → 6 H 7/2 transition of Sm 3+ ion. The optimal Sm 3+ doping concentration is ∼3 mol%. Fluorescent lifetimes of Ca 0.955 TiO 3 :0.03Sm 3+ phosphor with excitation 408, 467, and 481 nm are ∼0.809 m, 0.792 m, and 0.8 m, respectively. The PL intensity of Ca 0.955 TiO 3 :0.03Sm 3+ phosphor is enhanced 5–7 times after Na + ion is codoped as charge compensator and H 3 BO 3 is added as flux, and their CIE chromaticity coordinate is ∼ (0.5792, 0.4199). The experiment results are helpful to improve luminescence properties of other Sm 3+ -doped phosphors and study novel phosphors.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 15
·13005-13010
·
IF 2.324
Cao Renping,Cheng Xinyu,Zhang Fangteng,Su Lei,Chen Ting,Ao Hui,Yu Xiaoguang,Ruan Wen
A series of MgTiO 3 :Mn 4+ , MgTiO 3 :Mn 4+ , Ge 4+ , and MgTiO 3 :Mn 4+ , B 3+ phosphors are prepared by the high temperature solid-state reaction method in air. X-ray powder diffraction (XRD) patterns confirm that there is only pure phase in all samples. The samples are composed of microparticles with irregular shapes. Their excitation spectra monitored at 658 nm may be observed in the range of 200–600 nm and their emission spectra with excitation at 330 nm cover the region from 600 to 800 nm due to the 2 E → 4 A 2 transition of Mn 4+ ion. The chromaticity coordinate is (0.7233, 0.2767). The optimal Mn 4+ content is ~ 0.3% in MgTiO 3 :Mn 4+ phosphor. The luminescence intensity and quantum efficiency of MgTiO 3 :Mn 4+ phosphor may be obviously improved by adding Ge 4+ ion and H 3 BO 3 . The experimental results are helpful for the luminescence property improvement of other Mn 4+ doped materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICS LETTERS A
·
2019
·
IF 2.087
Renping Cao,Longxiang Xu,Yaqin Ran,Xinyan Lv,Siling Guo,Hui Ao,Ting Chen,Zhiyang Luo
Ba 2 LaSbO 6 :Mn 4+ , Ba 2 LaSbO 6 :Mn 4+ , Dy 3+ , and Ba 2 LaSbO 6 :Mn 4+ , H 3 BO 3 phosphors are synthesized in the air by high temperature solid state reaction method. The particle sizes and sintering degree of Ba 2 LaSbO 6 :Mn 4+ phosphor may be changed by doping Dy 3+ ion and H 3 BO 3 . When the small amount of Dy 3+ ion and H 3 BO 3 are codoped, the emission intensity of Ba 2 LaSbO 6 :Mn 4+ phosphor can be enhanced 1.2–1.3 times and the quantum efficiency of Ba 2 LaSbO 6 :Mn 4+ phosphor can be improved. The lifetime of Ba 2 LaSbO 6 :Mn 4+ phosphor may be changed by doping Dy 3+ ion and H 3 BO 3 . The experimental results are valuable in research of luminescence property of Mn 4+ -doped luminescence materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Sudip Kumar Lahiri,Pengcheng Zhang,Cheng Zhang,Lin Liu
Limited robustness is a serious drawback for superhydrophobic coatings and degrades the performance of superhydrophobic surfaces in practical applications. Although fluororeagents have excellent durability for superhydrophobicity, their use has been restricted due to various health and environmental concerns. In this work, we describe a facile and efficient fabrication strategy for creating robust fluorine-free superhydrophobic composite coatings that are prepared by a simple dip-dry method, in which the H3BO3-incorporated SiO2–alkyl-silane coatings are deposited on woven cotton fabric surfaces followed by polydimethylsiloxane modification. The coated surface shows a large water contact angle of 157.95 ± 2° and a small sliding hysteresis angle (SHA) of 3.8 ± 0.6°, demonstrating excellent superhydrophobicity. The coated fabric surface also exhibited robustness and durability, withstanding a tape-peeling test (under 48.05 kPa) for around 80 repetitions and sandpaper rubbing (loaded 100 g) for 40 cycles. Furthermore, the coated fabric surface displayed self-healing and oil–water separation capacities. The developed superhydrophobic coatings in this study are robust, environmentally benign, and easy to fabricate, showing promising applications in textile industries.
研究领域:
材料科学
·
纺织工程
·
表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2025
·
IF 9.8
Yifan Shao,Chao Hu,Ruirui Liu,Bingxin Liu,Yongquan Zhou,Jianming Pan
The design of adsorbents with high recognition activity, high site density and high mass transfer efficiency is the significant to the removal of specific non-metallic ions from Salt Lake brines. Here we report the fabrication of ZIF-67-derived hollow Co 3 S 4 nanoadsorbent for the adsorption and separation of boron (B) in complex water from concentrated salt solutions. The adsorption experiments displayed that the B adsorption capacity of the hollow Co 3 S 4 material exhibited substantial B adsorption capacity, reaching 283.3 mg·g −1 , which represents an impressive 7.3-fold improvement over ZIF-67. On these grounds, a series of kinetic and thermodynamic studies were conducted, and the results revealed that the adsorption process is more consistent with the spontaneous exothermic reaction of the Langmuir adsorption isothermal model (R 2 = 0.999). The results of the charge density and density of states depicted that Co atoms strongly interact before and after adsorption, and that Co atoms are tend to react spontaneously with H 3 BO 3 , which serves as the primary adsorption site. The interaction including electrostatic and hydrogen bonds jointly realizes in B adsorption performance with high selectivity and excellent cycle stability. This study highlighted the high adsorption performance of the hollow Co 3 S 4 for boron in real water of the Salt Lake brine and provided a new idea for the design of other ZIFs derived hollow nanoadsorbent for practical applications.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2022
·
IF 3.269
Shuaiqi Sun,Dan Li,Tao Zhang,Yong Ma,Lingzong Meng,Tianlong Deng,Yafei Guo
The solubilities and refractive indices in the systems NaCl–Na 2 SO 4 –H 3 BO 3 –H 2 O and NaCl–H 3 BO 3 –H 2 O at 323.15 K were investigated with the isothermal dissolution equilibrium method. The phase diagram of the ternary system consists of two single-salt crystallization fields of NaCl and H 3 BO 3 , two solubility univariant curves, and one invariant point. The dry-salt diagram of the quaternary system is composed of three single-salt crystallization fields corresponding to NaCl, Na 2 SO 4 and H 3 BO 3 , three solubility univariant curves, and one invariant point. A comparison of the diagrams of the quaternary system at (298.15, 323.15 and 373.15) K shows that areas of sodium chloride and sodium sulfate salts region increases whereas the area of H 3 BO 3 region decreases distinctly with temperature increasing. Combining the Pitzer parameters and solubilities in the ternary systems in this study and literatures, the lacking Pitzer parameters for H 3 BO 3 were fitted on the basis of Pitzer model. The calculated solubilities with the model agree well with the experimental data. The phase diagrams and Pitzer model for the quaternary system at 298.15 and 323.15 K were then used to conduct a computer simulation of brine separation. All H 3 BO 3 and most of Na 2 SO 4 can be separated from the solution with segmental evaporation method.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 17
·14879-14885
·
IF 2.22
Niu Shuting,Jiang Juan,Wang Jinzhao,Gan Lin,Zhang Tianjin
0.67CaTiO 3 –0.33LaAlO 3 (CTLA) microwave dielectric ceramic materials with the additives of H 3 BO 3 , Li 2 CO 3 or H 3 BO 3 –Li 2 CO 3 were prepared by a conventional solid-state reaction method. The effects of the sintering additives on the densification behavior, phase compositions, microstructures, and microwave dielectric properties of the CTLA ceramic samples were investigated. It was found that the binary additive of H 3 BO 3 –Li 2 CO 3 effectively promoted the densification and lowered the sintering temperature of the CTLA ceramic samples without a significant decrease in their Q × f values. For example, with an addition of 0.2 wt% H 3 BO 3 –0.1 wt% Li 2 CO 3 , the optimal microwave dielectric properties of ε r = 45.5, Q × f = 31,771 GHz and a near-zero τ f of 2.43 ppm/℃ were obtained in the CTLA ceramic sample sintered at only 1175 ℃, which is significantly lower (~ 225 ℃) compared to the sintering temperatures of conventionally sintered CTLA ceramics.
研究领域:
材料科学
·
电子材料
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2019
·
IF 1.859
Xunan Shen,Chao Zhang,Yang Feng,Wei Li,Guifeng Chen,Chengchun Tang
In this work, Cu 2 ZnSn(S,Se) 4 thin films were prepared by sol-gel methods based on dimethyl sulfoxide solutions with H 3 BO 3 additive. The morphological, structural, compositional and photovoltaic properties of the Cu 2 ZnSn(S,Se) 4 thin films were investigated. We found that the formation of voids, cracks and fine-grain layers were suppressed effectively with slight H 3 BO 3 . Based on the decrease of these micro defects, the series resistance decreased and shunt resistance increased largely. And the band gap of CZTSSe solar cells broaden from 1.031 eV to 1.064 eV. The best solar cell showed an open-circuit voltage of 440.1 mV, short-circuit current density of 28.15 mA/cm 2 , fill factor of 58.81% and power conversion efficiency of 7.27% under air mass 1.5 (100 mW/cm 2 ) illumination.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 6
·1402
·
IF 4.2
Zaifa Yang,Ruoxuan Wang,Shuyu Yang,Hongxia Bu,Jingfen Zhao
Mn4+-doped red-light-emitting phosphors have become a research hotspot that can effectively enhance photosynthesis and promote morphogenesis in plants. Herein, the red phosphor La3Mg2NbO9:Mn4+was synthesized through the solid-state reaction method. The effects of adding H3BO3and a charge compensator R+(R = Li, Na, K) on the crystal structure, morphology, quantum efficiency, and luminous performance of the La3Mg2NbO9:Mn4+phosphor were systematically analyzed, respectively. The results showed that adding H3BO3flux and a charge compensator improved the quantum efficiency and luminescence intensity. The emission intensity of the phosphor was enhanced about 5.9 times when Li+was used as the charge compensator, while it was enhanced about 240% with the addition of H3BO3flux. Remarkably, it was also found that the addition of H3BO3flux and a charge compensator simultaneously improved the thermal stability at 423 K from 47.3% to 68.9%. The prototype red LED fabricated using the La3Mg2NbO9:Mn4+,H3BO3,Li+phosphor exhibited a perfect overlap with the phytochrome absorption band for plant growth. All of these results indicate that the La3Mg2NbO9:Mn4+,H3BO3,Li+phosphor has great potential for use in agricultural plant lighting.
研究领域:
材料科学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTAL GROWTH & DESIGN
·
2020
·
IF 4.089
Yunxia Han,Duanwei He,Dejiang Ma,Qiming Wang,Yusheng Zhao,Shanmin Wang,Mingquan Jiang,Xin Li,Jiawei Zhang
We report high-pressure synthesis of single-crystal boron suboxide (B6O), one of the superhard materials, using a reaction route between B and H3BO3 at 3–5.5 GPa and 600–2200 °C. At optimized pressure and temperature conditions of 5.5 GPa and 2100 °C, large B6O single crystals can be obtained with a crystallite size of more than 2 mm. Boric acid (H3BO3) was used as a starting material because it is easily decomposed into B2O3 and H2O at a lower temperature. The B2O3 produced by the decomposition should have a small particle size and thus have high reactivity, and the reaction byproduct H2O provides a good hydrostatic environment for the growth of B6O. Therefore, it is easier to synthesize and grow B6O by using a B-H3BO3 system as reaction raw materials. This work discussed the B6O growth mechanism in detail. In addition, photoluminescence experiments and first-principles calculations show that B6O is a direct band gap semiconductor material with good orange-red emission characteristics (the band gap is 1.83 eV). The results of this study indicate a method to grow large B6O single crystals that have great potential use in industrial applications.
研究领域:
材料科学
·
晶体生长
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Lei Wang,Jiawei Yan,Min Zhong,Jiali Zhang,Wenzhuo Shen,Shouwu Guo
Gel electrolytes hold great promise for improving the safety of lithium-ion batteries (LIBs); however, their low lithium-ion transference number (tLi+ < 0.4) remains to be improved. Herein, boron-containing poly(vinyl alcohol) (B-PVA) solutions are prepared based on the simple reaction between PVA and H3BO3 and then electrospun to obtain the B-PVA nanofiber matrices. The gel electrolytes are formed by loading the liquid electrolytes into the as-obtained porous B-PVA matrices. We demonstrate that the tLi+ of B-PVA8 (with 8 wt % H3BO3 added) gel electrolyte can reach 0.81, much higher than that of the conventional PVA gel electrolyte (0.32). The B-PVA8 gel electrolyte also shows the highest Li+ conductivity of 1.81 × 10–3 S cm–1 compared to PVA. The B-PVA8 gel electrolyte enables a small Li nucleation overpotential of 129.8 mV when Li is plated and reduces the concentration polarization of Li||Li batteries. The mesocarbon microbead (MCMB) half-coin cells with the B-PVA8 gel electrolyte exhibit excellent rate capability and exceptional charge/discharge cycling stability.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 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）