JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Kaitong Liu,Jian Han,Fuming Li,Congcong Jin,Zhihua Yang,Miriding Mutailipu,Shilie Pan
A case of hydrous borate with the formula of Ba 2 B 13 O 19 (OH) 5 ·5H 2 O was synthesized by the traditional hydrothermal method . It crystallizes in the chiral P 1 space group and has a unique two-dimensional 2 [B 13 O 19 (OH) 5 ] ∞ layer that is constructed by the hydrogen involved [B 13 O 22 (OH) 5 ] fundamental building blocks (FBBs). The Ba atoms and H 2 O molecules are filled in the three-dimensional pore constructed by the 2 [B 13 O 19 (OH) 5 ] ∞ layer. Interestingly, Ba 2 B 13 O 19 (OH) 5 ·5H 2 O is the first case of hydrous borates that has the above rare [B 13 O 22 (OH) 5 ] FBB and 2 [B 13 O 19 (OH) 5 ] ∞ layer, which enriching the structural chemistry of borate system. The diffuse reflection spectrum result shows that the ultraviolet (UV) cutoff edge of Ba 2 B 13 O 19 (OH) 5 ·5H 2 O is below 200 nm. Its second harmonic generation (SHG) response is approximately 1.0 times that of potassium dihydrogen phosphate at the 1064 nm fundamental wavelength and it is also phase-matchable. Both results indicate that the title compound is a nonlinear optical crystal for UV spectral region. Theoretical simulation calculation shows that the occupied VE states are mainly contributed by the O-2p orbitals, and therefore [B 13 O 22 (OH) 5 ] groups are the main sources of SHG effects.
研究领域:
无机化学
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材料科学
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晶体工程
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光学材料
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固体化学
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DOI
高影响因子
Chemistry-An Asian Journal
·
2024
·
IF 3.5
Xinxin Dai,Zhen Tang,Xinyuan Yan,Shiyi Tao,Shanshan Wang,Yi Liu,Jiafeng Cao,Xiaolong Deng,Xin Bo
The exploring and developing non-precious transition metal-based catalysts for practical water electrolysis with the low cost, high efficiency and easy macroscopic preparation was still a challenge. Herein, Ni 3 S 2 /Ni(OH) 2 heterojunction with different sulfuration time was proposed and hydrothermally synthesized using a simple two-step approach, which served as a bifunctional electrocatalyst for water splitting in alkaline solution at industrial temperature. Among these catalysts, Ni 3 S 2 /Ni(OH) 2 -5h displayed the smallest overpotentials (237 mV@100 mA cm −2 and 360 mV@100 mA cm −2 ) for OER and HER at room temperature, along with low Tafel slopes of 62.0 mV dec −1 and 80.8 mV dec −1 respectively. Furthermore, working at high temperature Ni 3 S 2 /Ni(OH) 2 -5h exhibited even lower overpotential of 82 mV@100 mA cm −2 at 70 °C for OER and 325 mV@100 mA cm −2 at 60 °C for HER. The excellent performance was ascribed to the heterojunction accelerating the charge transfer, hierarchical interconnected structure promoting the mass transfer and the synergistic effect between the components of Ni 3 S 2 and Ni(OH) 2 . This work could provide a promising route for promoting the electrocatalytic performance of Ni-based catalyst with a simple sulfuration method for industrial water splitting, which could expand to other non-noble metal-based materials for enhancing the electrocatalytic activities.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yaowu Wei,Xiujuan Wang,Yuan Chen,Wenguo Zhang,Junfeng Chen
The effect of Ca(OH) 2 and Zr(OH) 4 on the sintering behavior and thermal shock resistance of Y 2 O 3 ceramics were investigated in this study. The results showed that Ca(OH) 2 enhanced the densification of Y 2 O 3 ceramics. CaO generated from the decomposition of Ca(OH) 2 reacted with Y 2 O 3 to form a solid solution. The substitution of Ca 2 + for Y 3+ created V O ∙ ∙ that facilitated substance migration and pore elimination. Conversely, the introduction of Zr(OH) 4 exerted an adverse effect on the sintering. ZrO 2 produced by the decomposition of Zr(OH) 4 formed a solid solution with Y 2 O 3 which inhibited the sintering of Y 2 O 3 ceramics, where Zr 4+ primarily enhanced lattice stability rather than promoting sintering. The O i ′ ′ created by the substitution of Zr 4+ for Y 3+ reduced cation diffusion and hindered grain boundary migration. The mechanisms by which two types of additives affect the thermal shock stability of Y 2 O 3 ceramics are different. The Zr(OH) 4 -doped ceramics demonstrated better thermal shock resistance owing to their higher porosity, which changed energy release pathway and increased the resistance to crack propagation. In comparison, the improvement in the Ca(OH) 2 -doped ceramics mainly originated from the enhanced mechanical properties, which would suppressed crack initiation and delayed failure under thermal stress.
研究领域:
材料科学
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陶瓷
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热学性能
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烧结技术
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DOI
高影响因子
POLYMER TESTING
·
2022
·
IF 4.931
Yuezhou Liu,Yanjing Liu,Xiyue Li,Yongfang Qian,Lihua Lv,Ying Wang
In order to fabricate antibacterial nanofiber membranes for tissue engineering field, the oxidative damage of magnesium hydroxide nanoparticles (Mg(OH) 2 NPs) against the model system of Escherichia coli ( E. coli ) was researched by measuring the oxidative stress response, oxidative stress products and glucose metabolism. The toxicity of Mg(OH) 2 NPs to a normal biological system was evaluated in vivo through the acute oral toxicity, blood physiological and serum biochemical markers and acute skin irritation, indicating that the Mg(OH) 2 NPs exhibited great biosafety. The Mg(OH) 2 NPs with antibacterial property and biosafety were loaded on PCL/PVP nanofiber substrates through electrospinning technology to fabricate the Mg(OH) 2 /PCL/PVP nanofiber membranes. The results of characterization and antibacterial test showed that the Mg(OH) 2 /PCL/PVP nanofiber membranes with 8.0 wt% Mg(OH) 2 NPs present excellent antibacterial rate of 100% against E. coli that the Mg(OH) 2 NPs can be physically and evenly loaded on nanofiber substrates.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Fuling Zhou,Chao You,Qiang Wang,Yilin Chen,Zhipeng Wang,Zuoping Zeng,Xuping Sun,Ke Huang,Xiaoli Xiong
A novel highly sensitive non-enzymatic glucose sensor is constructed based on an ultrafast synthesized amorphous NiCu-OH film coated Cu(OH) 2 nanorod array grown on copper foam (NiCu-OH@Cu(OH) 2 NRA/CF). The synthesized (NiCu-OH@Cu(OH) 2 NRA/CF) has abundant catalytic activity and good catalytic performance for the electrochemical detection of glucose in alkaline conditions. Sensitive and selective voltammetric detection of glucose is demonstrated. The linear range extends from 100 nM to 1.5 mM, the detection limit is 32 nM, and the sensitivity is 6560.3 μA mM -1 cm -2 . The method is applied to the determination of nitrite in human blood serum.
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高影响因子
ChemCatChem
·
2015
·Vol. 7
·期 8
·1372-1379
·
IF 4.556
Xing Tang,Xianhai Zeng,Zheng Li,Weifeng Li,Yetao Jiang,Lei Hu,Shijie Liu,Yong Sun,Lu Lin
Graphical In situ generated catalyst system: HCl/ZrO(OH) 2 catalysts are prepared in situ by the autonomous decomposition of ZrOCl 2 ⋅ 8 H 2 O in levulinic acid (LA)/2-butanol solution. The esterification of LA was catalyzed in tandem with hydrocyclization to γ-valerolactone (GVL) by Meerwein–Ponndorf–Verley reduction. This is the first report of HCl/ZrO(OH) 2 catalysts prepared in situ by the autonomous decomposition of ZrOCl 2 ⋅ 8 H 2 O in levulinic acid (LA)/2-butanol solution, which catalyzed the esterification of LA in tandem with hydrocyclization to γ-valerolactone (GVL) by Meerwein–Ponndorf–Verley (MPV) reduction without the use of external H 2 . A maximum GVL yield of 92.4 % from neat LA and a GVL formation rate of 1092.2 μmol g −1 min −1 were achieved in 2-butanol at 240 °C in 2 h. The in situ generated ZrO(OH) 2 was characterized comprehensively and its unexpected catalytic efficiency was attributed mainly to its extremely high surface area. A crude LA stream from the acid hydrolysis of cellulose was extracted into 2-butanol and subjected to this catalyst system to give a GVL yield of 82.0 % even in the presence of humins.
研究领域:
化学工程
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可再生能源
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催化化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zizheng Liu,Jiawei Liu,Haike Yang,Jingyi Guo,Yiqun Chen,Qing Shao,Shuxian Gao,Liting Luo
Arsenic is categorized as a class I carcinogen due to its strong biological toxicity. In this study, a novel treatment process with Cu 2 (OH) 2 CO 3 as catalyst is proposed, whereby As(III) in water is oxidized by activating sulfite to generate SO 4 − and SO 5 − radicals. Under conditions of [Cu 2 (OH) 2 CO 3 ] 0 = 0.01 g·L −1 , [sulfite] 0 = 0.3 mmol·L −1 , and initial pH 8.0, 94% of As(III) was converted into As(V) within 20 min, whereby dissolved oxygen had a pivotal impact on the reaction. However, HCO 3 − , humic acid, and fulvic acid all significantly inhibited the oxidation. Heterogeneous electron transfer on the catalyst surface and homogeneous dissolved Cu 2+ jointly activated sulfite in the Cu 2 (OH) 2 CO 3 /sulfite system, with the heterogeneous process predominating. Density functional theory (DFT) calculations disclose a dominate physical adsorption of sulfite on Cu 2 (OH) 2 CO 3 surface with 1.74 electrons transferred. >90% of As(III) was still oxidized after recycling the material five times, indicating excellent reusability. Overall, it shows good potential for application in the removal of As(III) from real water samples.
研究领域:
环境科学
·
化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chengfeng Yi,Jingwen Li,Jiarui Li,Bingchuan Xue,Xing Lin,Zhigang Liu
The electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) constitutes a pivotal pathway for biomass valorization. However, its advancement is kinetically hindered by the competitive adsorption between HMF and OH − on active sites, causing a conflict between substrate activation and oxidant supply. To circumvent this impediment, a series of Ni(OH) 2 /N,W-Ni 3 S 2 composite catalysts are designed via electrodeposition. This strategy enables the in-situ growth of amorphous Ni(OH) 2 overlayer on the nitrogen and tungsten co-modulated Ni 3 S 2 (N,W-Ni 3 S 2 ) substrate, realizing the precise construction of heterostructure. The Ni(OH) 2 component possesses strong affinity for OH − , while the Ni 3 S 2 substrate preferentially adsorbs HMF. By tuning the electrodeposition duration, the Ni(OH)₂ layer thickness can be regulated, thereby enabling the overall adsorption strengths of both HMF and OH − to be finely optimized. The superior catalyst, Ni(OH) 2 /N,W-Ni 3 S 2 –500, demonstrates exceptional catalytic activity, achieving 100 % HMF conversion, 97.2 % FDCA yield and 97.3 % Faradaic efficiency. Furthermore, it displays a wide operational potential window, maintaining FDCA yields and Faradaic efficiencies above 90 % over 1.45–1.60 V vs. RHE. This remarkable activity is attributed to an optimized adsorption behavior for HMF and OH − . Specifically, the enhanced affinity for OH − accelerates the generation of the true active species, high-valent nickel oxyhydroxide (NiOOH), and ensures a sufficient localized supply of the oxygen source. Simultaneously, the catalyst retains a moderate adsorption capacity for HMF molecules, ensuring effective substrate activation without inhibiting product desorption. This study proposes a novel and effective interfacial engineering paradigm to resolve the adsorption imbalance in biomass electrooxidation, offering a rational blueprint for superior electrocatalysts.
研究领域:
催化化学
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电化学
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能源材料
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环境科学
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纳米材料
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界面工程
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可持续化学
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产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2023
·
IF 8.4
Wenbin Shi,Nijia Song,Yanping Huang,Wenjie Wang,Chao He,Weifeng Zhao,Changsheng Zhao
Hydrogel treatment as a common cooling method could effectively ease pain and promote wounds healing by reducing thermal injury to the skin. However, the inherent low thermal conductivity of polymers limits the improvement of hydrogels’ cooling performance. The present study reports a simple method by combining thermal conductive fillers 1D hydroxylated multiwall carbon nanotubes (CNT-OH) and 2D hydroxylated hexagonal boron nitride (BN-OH) to construct 3D conductive networks in hydrogels for cooling treatment and burn therapy. It is interesting that the thermal conductive fillers are aligned via varying the mass ratios of CNT-OH to BN-OH. Hence, the utilization efficiency of the thermal conductive fillers is improved; and the thermal conductivity of the hydrogels is enhanced up to 1.31 W*m −1 *K −1 , which is 226 % to the pristine hydrogel of 0.58 W*m −1 *K −1 . Consequently, the optimized hydrogel exhibits rapid cooling abilities that the heated porcine skin only takes 168 s to decrease 30 °C with the treatment of the hydrogel. More importantly, the thermal conductivity enhanced hydrogel exhibits the capacities of rapid cooling, reducing heat injury and pain relieving, and promoting wound healing in vivo tests, which prove that the enhanced thermal conductive and moisturizing hydrogel can be a good alternative for burn therapy.
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高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 34
·345706
·
IF 3.874
Leqiu He,Yan Wang,Yajie Guo,Guobing Li,Xubin Zhang,Wangfeng Cai
Novel core−shell nanostructure electrodes benefit from the excellent properties of their constituent materials, as well as the synergy between them. However, it is challenging to fabricate such structures efficiently. In this study, NiSe nanorods were fabricated using Ni foam as the conductive substrate and reactant via a one-step hydrothermal process, and Ni(OH)2 nanosheets were coated on the surface of the nanorods via one-step electrodeposition. The effect of the structure and morphology on the properties of the material was explored using scanning electron microscopy, x-ray diffraction, and electrochemical technology. The obtained core−shell NiSe/Ni(OH)2 exhibited an areal capacity of 1.89 mAh cm−2 at a current density of 5 mA cm−2. The assembled NiSe/Ni(OH)2//AC hybrid supercapacitor exhibited excellent energy and power densities, indicating that NiSe/Ni(OH)2 has great potential for use as a battery-type electrode in energy storage systems.
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Xinpu Yang,Zhanwen Wang,Siqi Chen,Yuan He,Gang Wang,Xiping Yang,Mingxia Lu
A Ni(OH)2/reduced graphene oxide (rGO) nanocomposite with a well-defined hexagonal nanosheet morphology was synthesized via a one-step hydrothermal approach using graphene oxide (GO) and nickel sulfate hexahydrate (NiSO4·6H2O) as precursors. Crucially, a commercial-level high mass loading of 8 mg·cm–2 was successfully achieved on the electrode. Structural analysis confirmed that the incorporation of rGO effectively prevents the agglomeration of Ni(OH)2 nanosheets, while forming an interconnected three-dimensional (3D) conductive network. This unique structure enhances the overall electrical conductivity and facilitates rapid ion diffusion even under heavy mass loading conditions. Electrochemical characterization in a three-electrode system revealed that the composite synthesized with a GO concentration of 1 mg·mL–1 (NG-1) exhibited remarkable rate capability across current density ranging from 0.5 to 5 A·g–1. At a current density of 0.5 A·g–1, it delivered a superior specific capacity of 369.5 C·g–1. When assembled into an asymmetric supercapacitor with activated carbon (AC), the hybrid device delivered a specific capacitance of 101.6 F·g–1 (174.4 C·g–1) at 0.5 A·g–1. More remarkably, it demonstrated exceptional cycling stability with 102.2% initial capacitance retention after 10,000 charge–discharge cycles at 2 A·g–1, confirming the excellent electrochemical stability of the NG-1 electrode. Notably, the assembled device attained an energy density of 36.12 Wh·kg–1 at a power density of 400 W·kg–1, significantly surpassing conventional electrochemical double-layer capacitors. The Ni(OH)2/rGO nanocomposites developed in this work combine facile synthesis with outstanding electrochemical properties, providing a promising material solution for high-power energy storage applications.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 22
·13279-13287
·
IF 12.732
Lin-Fei Gu,Cheng-Fei Li,Jia-Wei Zhao,Ling-Jie Xie,Jin-Qi Wu,Qian Ren,Gao-Ren Li
Two-dimensional transition metal hydroxides are greatly limited in the application of the electrocatalytic oxygen evolution reaction (OER) due to its large and inert basal planes. Herein, we report a one-step in situ etching hydrothermal method to construct Co(OH)2 and Ni(OH)2 heterostructure nanomaterials, successfully activating the basal plane of Co(OH)2. The abundant lattice strains that appear at heterogeneous interfaces cause a downshift of the d-band center of Co in Co(OH)2 and promote the desorption of oxygen during the OER process, which accelerates reaction kinetics of the OER and improves catalytic activity effectively. Furthermore, the electron interaction at the Co(OH)2/Ni(OH)2 interfaces leads to charge polarization, which will regulate the adsorption and dissociation of H2O molecules and enhances mass and electron transfer. Owing to the above advantages of Co(OH)2/Ni(OH)2 interfaces, the as-prepared composite catalysts show an excellent OER catalytic performance with a low overpotential of only about 270 mV at 20 mA cm−2, maintaining long-term catalytic stability for more than 24 h at 20 mA cm−2.
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高影响因子
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