ANALYTICAL LETTERS
·
2025
·
IF 1.8
Hongdan Wang,Xixi Song,Qianqian Wu,Tingting Yu,Ting Lin,Yiran Yu,Zhenxiao Dai,Hongyan Bai
Zeolitic imidazolate framework-67 (ZIF-67) was firstly synthesized using cobalt (II) chloride hexahydrate and 2-methylimidazole. Then, glucose molecules were adsorbed into the ZIF-67 microporous structure and ZIF-67 loaded with carbon quantum dots (CQDs-ZIF-67) were synthesized by low-temperature calcination. CQDs-ZIF-67 and nickel chloride hexahydrate (II) were dissolved in anhydrous ethanol and CQDs/Co2(OH)3Cl/NiCl(OH) nanocomposites were synthesized by a hydrothermal method. A nonenzymatic glucose electrochemical sensor based on a glassy carbon electrode (GCE) modified by CQDs/Co2(OH)3Cl/NiCl(OH) was constructed and exhibited a wider linear range and a lower detection limit for glucose detection due to the abundant pore structure and good electrocatalytic activity of CQDs/Co2(OH)3Cl/NiCl(OH).
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2018
·Vol. 102
·期 3
·1414-1424
·
IF 2.956
Yaowu Wei,Tao Zhang,Qi Zhang,Bingqiang Han,Nan Li
Improving the hydration resistance of CaO aggregates is the key to successful application of lime-based refractories in metallurgical industry. Additive Zr(OH) 4 and Al(OH) 3 were introduced in the preparation of CaO granules using granulation equipment and calcination method in this study. The results showed that the hydration resistance of CaO granules was improved significantly, especially for granules with 0.6 wt.% Zr(OH) 4 and 0.9 wt.% Al(OH) 3 , respectively. The shell of CaO granules was relatively dense after calcination and the volume of open pores of CaO granules decreased from 3.56 × 10 −2 to 1.80 × 10 −2 cm 3 /g when additive was introduced. Zr(OH) 4 and Al(OH) 3 have the opposite effect on the closed porosity of CaO granules, the closed porosity of CaO granules was decreased with Zr(OH) 4 addition, but increased with Al(OH) 3 addition.
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INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Ya-Lan Deng,Chun-Li Hu,Jiang-Gao Mao
The π-conjugated [C3H6+xN6]x+ (x = 0–3) cations are good functional groups, which are widely employed in the preparations of nonlinear optical (NLO) and birefringent materials due to their high hyperpolarizability and optical anisotropy. In this paper, the first melamine hydroxyborate [C3H7N6]3[B3O5(OH)2] (MelBO-I) was synthesized by the boric acid melting method under the molar ratio of H3BO3:C3H6N6 = 1:1. MelBO-I (P21/c) exhibits a two-dimensional (2D) {[C3H7N6]3[B3O5(OH)2]}∞ layer composed of [C3H7N6]+ cations and [B3O5(OH)2]3– anions interconnected via hydrogen bonds. MelBO-I exhibits significant birefringence (Δn = 0.286@546 nm). Under the molar ratio of H3BO3/C3H6N6 = 3:1, [C3H8N6]4[B12O19(OH)6] (MelBO-II) was isolated. In MelBO-II (P21), highly polymerized [B12O19(OH)6]8– groups form a 3D network through hydrogen bonding, featuring 1D tunnels of 8-membered and 16-membered rings filled by [C3H8N6]2+ cations. MelBO-II is the first noncentrosymmetric (NCS) bifunctional melamine borate with a moderate SHG response (0.4 × KDP) and large birefringence (Δn = 0.285@546 nm). The results indicate that incorporating [C3H6+xN6]x+ (x = 0–3) cations into borate can effectively induce birefringence. A high concentration of boric acid promotes the formation of large boric acid cluster anions and facilitates the transformation from the CS to NCS structure.
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PubMed
高影响因子
IONICS
·
2022
·Vol. 28
·期 8
·3945-3956
·
IF 2.961
Wei Xuedong,Chai Yudan,Chen Weifeng,Liu Nan,Qiao Shuangyan
In this paper, an amorphous composite electrocatalyst of Co(OH) 2 -Ni(OH) x S y was prepared by a simple and rapid electrochemical deposition method on nickel foam (NF). The electrochemical performance for oxygen evolution reaction (OER) was tested in 1 M KOH solution. The overpotential of Co(OH) 2 -Ni(OH) x S y (Co:Ni = 9:1) electrode was 423 mV at 50 mA cm −2 . The potential of the Co(OH) 2 -Ni(OH) x S y (Co:Ni = 9:1) sample remained essentially unchanged from the initial potential of 1.651 V after 12 h of stability test. In this catalyst, the strong synergistic effect between cobalt and nickel ions, the greatly increased amorphous defect sites and oxygen vacancies, and the abundant electrochemical specific surface area together lead to the increased electrocatalytic activity and high electrocatalyst stability. This amorphous CoNi-based composite electrocatalyst prepared by simple electrodeposition has certain significance for the preparation of hydrogen energy.
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高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Ru-Ling Tang,Mei Yan,Wen-Dong Yao,Wenlong Liu,Sheng-Ping Guo
Oxyhalides possessing the merits of oxides and halides have widely received attention for their comprehensive physical performances, especially as potential nonlinear optical (NLO) crystals. Here, based on conventional strategy for obtaining acentric compounds, a Te4+ lone-pair cation was introduced into oxyhalides, and one oxyfluoride, HgTeO2F(OH), was obtained via a hydrothermal reaction. Crystallized in the polar space group Pca21, the layered structure of HgTeO2F(OH) is composed of V-shaped [HgO2]2– groups and [TeO2F(OH)]2– pyramids, in which the [TeO2F(OH)]2– pyramid first served as the NLO functional motif. Its powder sample exhibits a phase-matchable SHG response of 1.1 × KH2PO4 at 1064 nm, and its birefringence (0.09@1064 nm) is sufficient for phase-matchable behavior, which manifests its comprehensive capacity as a promising NLO candidate. Theoretical calculations about electronic structure and optical properties are also carried out, revealing that the Te4+ lone-pair cation makes the predominant contribution to the SHG effect and synergizes with the [HgO2]2– groups.
研究领域:
材料科学
·
无机化学
·
非线性光学
·
晶体设计
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高影响因子
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
·
材料科学
·
晶体工程
·
光学材料
·
固体化学
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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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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
·
陶瓷
·
热学性能
·
烧结技术
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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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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
·
可再生能源
·
催化化学
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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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高影响因子
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