APPLIED SURFACE SCIENCE
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2024
·
IF 6.3
Yulan Song,Cuilan Tang,Tao Wang,Yansong Liu,Xiaoshan He,Chunping Xie,Guo Chen,Chengfu Deng,Zhibing He,Jinglin Huang
Constructing electronic structures with abundant surface/interface structures and effective regulation of catalytic active centers is an effective strategy to improve electrocatalytic performance, but designing efficient bifunctional non-noble metal oxygen evolution reaction (OER) and urea oxidation reaction (UOR) electrocatalysts remains challenging. Studies have shown that p-n heterojunctions can effectively regulate the electronic structure of catalytic active sites while having abundant surface/interface structure, which plays an important role in improving the native catalytic activity. Herein, FeNi-OH/Co(OH) 2 /NF p-n heterojunction structure was constructed by a simple electrochemical deposition method, and the effects of content, deposition time, and number of cycles on catalytic performance were investigated. The results show that Fe(0.02 M)Ni(0.07 M)–OH(100 s)/Co(OH) 2 (5)/NF composite material has the best OER and UOR catalytic performance. For OER, the electrocatalyst only requires an overpotential of 271 mV to obtain a current density of 50 mA cm −2 , and an applied voltage of 1.56 V to obtain a total water decomposition of 10 mA cm −2 (FeNi-OH/Co(OH) 2 /NF||Pt). For UOR, a voltage of only 1.314 V ( vs. RHE) is required to achieve a current density of 10 mA cm −2 , and an applied voltage of 1.44 V can achieve a current density of 10 mA cm −2 . Experimental, in situ measurements and theoretical results indicate that the improvement in catalytic activity is mainly due to the potential difference between FeNi-OH and Co(OH) 2 , which induces self-driven charge transfer at the interface, promoting the adsorption of reactant molecules, optimizing reaction barriers, accelerating chemical bond cleavage, and thus promoting catalytic reactions.
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Nutrition & Metabolism
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2022
·Vol. 19
·期 1
·1-9
·
IF 4.654
Qiu Fubin,Li Rui,Gu Siyu,Zhao Yimin,Yang Linxue
Background Iron and vitamin D (VD) is essential to health. Previous studies have shown that iron homeostasis has a potential effect on VD metabolism, but the mechanism is not fully understood.ObjectivesTo explore the relationship between VD metabolism and iron metabolism, as well as the regulatory mechanism of iron on VD metabolism.Methods 40 male rats were fed adaptively for 7 days and randomly divided into control (C, n = 6 normal diet) group and model (M, n = 24 iron deficient diet) by simple randomization, the latter was used to establish iron deficiency anemia (IDA) model. After 6 weeks of feeding, the M group was randomly divided into: iron deficiency group (DFe), low iron group (LFe), medium iron group (MFe) and high iron group (HFe) by block randomization. Different doses of iron dextran (based on iron content (100 g·bw·d)): 0, 1.1, 3.3 and 9.9 mg) were given respectively. After 4 weeks, the rats were anesthetized with 8% chloral hydrate, Blood (collected from the abdominal aorta), liver and kidney tissues were collected. The serum and tissues were separately packed and frozen at -80℃ for testing.Results The results showed that the levels of hemoglobin (Hb), red blood cell (RBC), serum iron (SI), liver iron, and kidney iron in DFe group were lower than those in the other four groups, while the levels of total iron-binding capacity (TIBC), transferrin (TF) and transferrin receptor (Tfr) in DFe group were higher than those in other groups; The serum levels of 25-(OH)D3 and 1,25-(OH)2D3 in DFe group were significantly lower than those in C group (P < 0.05). The correlation analysis showed that the levels of 25-(OH)D3 and 1,25-(OH)2D3 were negatively correlated with TIBC, TF and Tfr no correlation with SI. Western blotting, immunofluorescence, and q-PCR results showed that compared with C group, the protein and gene expressions of CYP2R1, CYP27A1, and CYP24A1 in DFe group were down-regulated, and the expression of CYP27B1 protein and gene was up-regulated in DFe group.Conclusion Iron may be involved in the metabolism of VD3 by regulating the expression of VD3 hydroxylase, suggesting that appropriate iron supplementation might promote the activation of VD3.
研究领域:
营养学
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生物化学
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药理学
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动物生理学
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PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Siqi Liu,Xiezhen Zhou,Weiqing Han,Jiansheng Li,Xiuyun Sun,Jinyou Shen,Lianjun Wang
Flutriafol is one of the widely used triazole fungicides in global pesticides market, and its degradation mechanisms are important to develop powerful technologies to remove it. Insight into the kinetics and mechanisms of · OH-mediated mineralization of flutriafol have been obtained using quantum chemical calculation and electrochemical experiment methods. The complete · OH-mediated degradation pathway of flutriafol was proposed by density functional theory (DFT) simulation and the potential energy surface was mapped out for possible reactions. On the basis of DFT calculations, the optimal · OH-mediated mineralization mechanism of flutriafol was revealed, and a series of intermediates were observed accumulated in the degradation process, most significance among which were (2-fluorophenyl) (4-fluorophenyl)-Methanone, phenol , dihydroxybenzenes, benzoquinones , muconic acids , maleic acids , oxalic acids and formic acid . To give deeper insight into the · OH-mediated reaction mechanism, the electrostatic potential (ESP) and average local ionization energy (ALIE) analysis were conducted for o-benzoquinone and p-benzoquinone. The proposed mechanism was further validated by electrochemical experiments at TiO 2 -NTs/SnO 2 -Sb/PbO 2 anode. The main intermediates were identified and quantified by experimental method, indicating that the proposed · OH-mediated degradation mechanism derived from DFT calculations was feasible. These detailed findings could be instrumental for a comprehensive understanding of the · OH-mediated mineralization mechanism of flutriafol and the similar contaminants.
研究领域:
环境科学
·
化学
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高影响因子
Journal of Energy Storage
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2026
·
IF 10.7
Yongbo Liu,Yang Chen,Limei Song,Jianhua Gao
In the field of electrochemical energy storage, polyanionic compounds exhibit outstanding electrochemical performance owing to their stable crystal structures and tunable operating potentials. Among these, vanadium-based phosphates stand out and have been extensively investigated. In this work, a novel polyanionic compound, Na 3 V(OH)(HPO 4 )(PO 4 ), was synthesized by a simple one-step hydrothermal method. Its crystal structure, confirmed by Rietveld refinement of the X-ray diffraction data, can accommodate sodium ions and provide open interstitial pathways to facilitate Na + diffusion, suggesting its potential as a cathode material for sodium-ion batteries (SIBs). Bond valence sum analysis and density functional theory calculations further validated the high Na + ion transport efficiency within the framework. Based on these findings, a half-cell was assembled using the as-prepared material as the cathode and metallic sodium as the anode. Electrochemical tests demonstrated excellent reversible cycling stability and rate capability, underscoring the promise of Na 3 V(OH)(HPO 4 )(PO 4 ) as a high-performance cathode candidate for SIBs.
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JOURNAL OF LUMINESCENCE
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2025
·
IF 3.6
Yue Wang,Yaomin Lei,Wuqin Chen,Ruian Yang,Xinyang Gu,Gaofeng Pan,Xuesong Zhai,Jinshan Wang
Luminescence quenching effect of lanthanide-doped upconversion materials occurs with high probability even in larger-sized particles, but their main quenching pathway remains controversial. In this work, we investigate the influence of the surfactant and pH value on the luminescence properties of β-NaLuF 4 :Yb,Er microcrystals. A convincing evidence can be provided by the combination of X-ray diffraction (XRD), inductively coupled plasma (ICP) spectrometer, and Eu 3+ structural probe measurements that the major quenching pathway comes from the fast energy migration from the excited lanthanides to nearby OH − defects in the crystal lattice rather than surface quenching effect. Even at OH − -rich reactant condition, the upconversion luminescence intensity becomes more efficient by reduced internal quenching effects. Our findings provide a new and fundamental understanding of severe luminescence quenching effect at microscale, thus guiding the design and preparation of highly efficient upconversion materials.
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 13.2
Lu Zheng,Saisai Ju,Xiong Li,Yongde Ma,Hongwei Zhang,Zhenping Cai,Yanning Cao,Kuan Huang,Lilong Jiang
Efficient capture of residual NH₃ from Haber-Bosch recycling gas is essential to improve process efficiency and reduce environmental impact. In this study, a series of sulfonated porous organic polymers (PTO-1S, PTT-1S, PTF-1S) were fabricated by a post-sulfonation strategy using phenolic hydroxyl-containing precursors to capture NH 3 . Comprehensive characterizations of the sulfonated derivatives demonstrated not only the successful grafting of –SO₃H groups, but more importantly, a cooperative effect with the native phenolic –OH groups. The optimized PTO-1S achieves an outstanding NH₃ capacity of 11.52 mmol/g (at 298.2 K and 1 bar), with particularly impressive performance at low pressures (5.56 mmol/g at 313.2 K and 0.03 bar), surpassing most reported adsorbents. Mechanistic studies revealed that this cooperation creates an optimal balance of strong chemisorption (–SO₃H) and reversible hydrogen bonding (–OH), which is identified as the origin of the high capacity and exceptional cycling stability (< 1% capacity loss/cycle). Besides, the sulfonated samples maintain excellent selectivity under simulated industrial conditions (NH₃/N₂/H₂ mixtures) and a rapid adsorption rate (90% saturation within 2 min), demonstrating their potential for practical NH₃ recovery applications.
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JOURNAL OF MATERIALS SCIENCE
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2022
·Vol. 57
·期 44
·20580-20588
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IF 4.682
Yan Jingjing,Zhu Chengwei,Liu Baohua,Shu Ruiwen
A facile synthetic route based on the assistance of magnetic field is reported to fabricate core–shell CoB@Co(OH) 2 nanochains for purpose of the high conductive pathway and enhanced pseudocapacitance in 3 M LiOH electrolyte. By adjusting the loading amount of the shell Co(OH) 2 nanosheets anchored on the core CoB alloy surface, the typical core–shell CoB@Co(OH) 2 is endowed with the appropriate pore volume of 0.27 cm 3 g −1 and the high accessible electrode/electrolyte interfacial area (62.3 m 2 g −1 ) and the fast conductive highway; meanwhile taking advantages of core–shell structure can be favor for fast ion transport between the electrode/electrolyte interphase and rapid electron transfer. Benefiting from the advantageous properties, the typical CoB@Co(OH) 2 electrode exhibits a high specific capacitance of 492.8 F g −1 in three-electrode device together with good cyclic stability (90.4% capacitance retention) during continuously 5000 cycles at 2 A g −1 . This work can provide an inspiring strategy for rational designing of core–shell CoB@Co(OH) 2 , and indicate their potential energy application in alkaline electrolyte. Graphical abstract
Core–shell CoB@Co(OH) 2 electrode with rapid conductive highway achieves the broaden voltage of 0.8 V and the enhanced supercapacitive performance.
研究领域:
材料科学
·
电化学
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高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 34
·13632-13638
·
IF 5.7
Wenjing Tan,Xuefan Wang,Ruqing Wei,Hongbo Huang,Daqing Yang,Ying Wang,Bingbing Zhang
Nonlinear optical (NLO) crystals are crucial components in all-solid-state lasers because they expand the wavelengths of existing laser sources through laser frequency conversion. In this work, Ag2[TeO2(OH)4] was identified in tellurates using the first-principles high-throughput screening pipeline for NLO materials (FHSP-NLO). The material was successfully produced via mild aqueous solution synthesis conditions, and a single crystal of 8 × 4 × 4 mm3 in size was obtained. Ag2[TeO2(OH)4] is one of the few materials that contains the [TeO2(OH)4]2− anionic group and belongs to the non-centrosymmetric (NCS) space group. Ag2[TeO2(OH)4] exhibited balanced comprehensive performances, including a large second harmonic generation (SHG) response of about 0.84 × AgGaS2 (AGS), moderate band gap (2.73 eV) and large birefringence (0.106@1064 nm). First-principles studies revealed that the dominant units that contribute to the crystal's linear and nonlinear optical properties are Ag atoms and TeO2(OH)4 groups.
研究领域:
材料科学
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光学
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无机化学
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计算物理
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·
IF 7.139
Yuyu Li,Fang Luo,Yuhua Xie,Chaofeng Chang,Ming Xie,Zehui Yang
Urea oxidation reaction (UOR) is a promising substitution of oxygen evolution reaction (OER) in overall water splitting technology because of the lower theoretical potential; thereby, a win-win benefit is achieved due to the simultaneous hydrogen generation and water purification . The efficient UOR catalysis substantially depends on the exposed active sites and mass transfer resistance, especially at high current density to meet the requirement of industrial water splitting technology. In this work, we have synthesized α-Ni(OH) 2 porous nanoflowers (α-Ni(OH) 2 –PNF) using ZIF-67 as template. Ascribing to the Kirkendall effect , nanopores are created on α-Ni(OH) 2 nanosheets benefiting for the formation of abundant oxygen vacancies as well as drop-off in mass transfer resistance during UOR catalysis. Meanwhile, the binding strength between active site and CO 2 , rate-determining step of UOR, is weakened by oxygen vacancies; as a result, only 1.477 V vs. RHE is demanded for α-Ni(OH) 2 –PNF to catalyze UOR with 100 mA cm −2 , 67 mV lower than α-Ni(OH) 2 nanosheets. Besides, an exceptional stability is also achieved for α-Ni(OH) 2 –PNF with negligible degradation during 20 h catalysis.
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2022
·Vol. 48
·期 8
·3347-3357
·
IF 3.134
Zhang Xiangxiang,Zhou Man,Zhong Yang,Zhang Letian,Kang Jianjian,Wang Lingzhi
Co(OH) 2 modified TiO 2 (Co(OH) 2 /TiO 2 ) was fabricated by a simple precipitation method and applied as a surface enhanced Raman scattering (SERS) substrate. Using triphenylmethane dye acid blue 83 as the analyte, the SERS substrate showed high sensitivity with a detection limit of 1 × 10 –7 M and high signal reproducibility with a relative standard deviation of 8.9%. Moreover, the substrate can also be used to in situ monitor the catalytic degradation of Acid blue 83. In addition, compared with cationic triphenylmethane dye, the Co(OH) 2 /TiO 2 substrate presented stronger SERS activity towards anionic counterparts. The easy preparation and high sensitivity and selectivity towards anionic dyes of Co(OH) 2 /TiO 2 provides a robust alternative for promoting the practical application of semiconductor-based SERS substrate in selective detection.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yanzhou Ding,Yiwen Zhu,Xia Yu,Shuguang Lyu,Yanlin Wu,Lei Zhou,Qian Sui
Antibiotic residues in aquatic environments can be effectively degraded by hydroxyl radical ( OH)-based advanced oxidation processes (AOPs). However, the reaction kinetics and mechanisms have not been comprehensive determined due to the limitations of conventional competition kinetic methods and mass spectrometry-based product identification, as these methods fail to exclude interference from secondary radicals and are unable to capture unstable intermediates or transient species. In this study, these limitations were overcome using laser flash photolysis (LFP) and density functional theory (DFT) calculations, allowing accurate determination of the OH-initiated reaction kinetics and degradation mechanisms of florfenicol (FF), a model veterinary antibiotic compound that is frequently detected in the environment. Based on the LFP experiment results, the second order rate constant ( k ) between OH and FF was determined to be 1.96 × 10 9 M −1 s −1 by tracking the typical signal of (SCN) 2 − . Furthermore, DFT calculations revealed two distinct mechanisms for OH addition to the benzene ring and identified hydrogen atom abstraction (HAA) reaction from chiral carbons as being the most favorable initial reaction for OH. In addition, the destruction of chlorine moiety occurred via hydroxylation-chlorine abstraction, rather than direct chlorine abstraction or substitution reactions. The resistance of chlorine moiety to degradation during the initial oxidation process, resulted in the formation of chlorine-containing by-products. This study provided a novel approach to comprehensively investigate the mechanisms of emerging contaminants elimination during OH-based AOPs.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Jia Deng,Xiang Zhan,Feng Wu,Shuxian Gao,Li-Zhi Huang
Trichloroethylene (TCE), one of the most frequently detected chlorinated organic pollutants (COPs) in groundwater, has potential risks to human health. The bimetallic system consisting of zero-valent iron (ZVI) and a second catalytic metal has been widely investigated for reductive dechlorination of COPs. However, the passivation layer of ZVI inhibits the electron transfer causing a low dechlorination efficiency. In this work, we designed a novel bimetallic system using Fe(OH) 2 and Ni for fast dechlorination of TCE. The reduction efficiency of TCE reaches 94.8 % after 5 h of reaction in the Fe(OH) 2 /Ni system. TCE was completely dechlorinated to nontoxic gas products including ethylene and ethane, which was attributed to the generation of active hydrogen species (H*) in the system. The Ni 2+ cations undergo the process of hydroxylation and olation. Subsequently, electrons of Fe(OH) 2 were transferred to Ni(II) causing the formation of Ni(0). The catalytic Ni(0) sites generate H* for TCE dechlorination via catalytic reduction of H 2 O/H + . A part of Fe(II) in the Fe hydroxide layer of Fe(OH) 2 was oxidized to Fe(III) leading to the formation of green rust with a hexagonal structure. Our work demonstrates Fe(OH) 2 /Ni is a promising composite material for the remediation of TCE-contaminated groundwater.
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