CERAMICS INTERNATIONAL
·
2026
·
IF 6
Longgong Xia,Zhiqian Yu,Feng He,Yiwang Zhang,Huilan Yang,Kai Ma
(Fe/Zn/Ni)O·(Fe/Al) 2 O 3 spinels are widely used as raw materials for advanced ceramics and refractories and occur as precipitates in slag phases during nonferrous metal pyrometallurgy. The stability and phase-transformation mechanisms of these spinels are important for optimizing material performance and controlling metallurgical processes. The decomposition of Fe 3 O 4 , FeAl 2 O 4 , ZnFe 2 O 4 , ZnAl 2 O 4 , NiFe 2 O 4 , and NiAl 2 O 4 under various atmospheres was experimentally investigated, and phase evolution during reduction was elucidated. Thermogravimetric and differential thermal analyses and reduction experiments showed that Fe(II)-bearing spinels tended to decompose at elevated temperatures in air. ZnFe 2 O 4 and ZnAl 2 O 4 were stable at temperatures up to 1500 °C in air and in an atmosphere with p O2 = 10 −6 atm. At low oxygen partial pressure, aluminate spinels exhibited greater stability. The reduction kinetics of these spinels were also analyzed. The reduction of Fe 3 O 4 , ZnFe 2 O 4 , NiFe 2 O 4 , and NiAl 2 O 4 was described by the Avrami-Erofeev model, indicating that the reduction process was controlled by the nucleation rate. The reduction of ZnAl 2 O 4 was described by a diffusion model.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiaohua Wang,Yanwei Li,Guang Sun,Jianliang Cao,Yan Wang
The pressing demand for environmental and health safeguarding has spurred intense enthusiasm among researchers to delve into metal oxide semiconductors (MOSs) based gas sensors. Particularly, the accurate detection of trace hydrogen sulfide (H₂S), which has drawn growing attention, has become a focal point. Herein, a molybdenum (Mo) doping strategy was presented to enhance the H₂S-sensitive properties of In₂O₃ nanomaterials to detect the presence of 1 ppm H₂S at comparatively lower temperatures. The Mo-doped In₂O₃ cubic nanoparticles (Mo-In₂O₃ CNPs) were synthesized through a hydrothermal route using In(OH) 3 as a precursor. When used as a sensitive material for the detection of H₂S, the Mo–In₂O₃ CNPs have shown some impressive improvements compared to pure In₂O₃ counterparts, including a reduction in working temperature (240 °C vs 300 °C), an increase in sensitivity (18.46 vs 11.34 for 20 ppm H₂S), a better selectivity (6.2 vs 2.84 times to ethanol), and a lower limit of detection (0.79 vs 0.47 ppm). Even to 1 ppm H₂S, the Mo-In₂O₃ sensor can give a response of 2.18, signifying its application feasibility in detecting trace amounts of H₂S. The multiple sensitization effects and their potential mechanism of Mo-In₂O₃ CNPs were discussed in detail.
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Zipeng Zheng,Jun Hu,Weijie Zhou,Hongqing Yuan,Jianxia Sun,Yongbin Xu,Weibin Bai
Anthocyanins are a class of water-soluble flavonoid pigments widely distributed in plants, characterized by their flavylium cation core. Glycosylation modifications exert significant effects on the biological activities of anthocyanins with identical aglycones. This study accomplished the first chemical syntheses of cyanidin-3-O-galactoside (C3Gal) and cyanidin-3-O-arabinoside (C3Ara), providing a general glycosylation strategy. The configurations of β-D-galactopyranoside and α-L-arabinopyranoside were determined by 2D NMR. Comparative analysis of cyanidin-3-O-glucoside (C3Glu), C3Gal, and C3Ara revealed that C3Glu was the most stable, whereas C3Ara and C3Gal exhibited superior antioxidant activity. C3Ara also showed the strongest inhibition against α-amylase (IC 50 = 98.16 μM), consistent with molecular docking predictions. These results reveal the key structure-activity: hexoses (glucose, galactose) have higher stability and reduced activity. Pentosyl arabinosides have higher biological activity. This work provides a reliable preparation method and research direction for anthocyanin glycosides.
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产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2026
·
IF 26
Xianghui Shi,Zhihao Zhang,Liuxin Xu,Zhe Wang,Qianjiang Mao,Yue Jiang,Xiaoxin Yang,Zihao Ma,Dan Cheng,Wenkun Jiang,Mingzhen Hu,Kebin Zhou
Globally, the proton exchange membrane water electrolyzers (PEMWEs) already account for approximately 30% of the hydrogen market and are undergoing rapid expansion. However, the commercially used iridium-based anodic oxygen evolution reaction (OER) catalysts in PEMWEs still suffer from notably poor reactivity. At present, the oxide pathway mechanism (OPM) is an important route to achieve both high activity and durability in OER. Nevertheless, the performance of conventional Ir-based crystalline OER catalysts following the OPM pathway remains far below their theoretical limit, which is significantly hindered by two intrinsic limitations. First, their rigid lattice structures prevent the shortening of metal-metal distances, which is essential to facilitate the rate-determining O * ─O * dimerization. Second, the repulsion between O * adsorbates during OER inevitably weakens the metal = O * bond and undermines the overall oxygen evolution efficiency. Herein, we report that an amorphous IrMO x catalyst elegantly overcomes the limitations of the OPM pathway by virtue of its dynamic surface structure and strong oxophilicity of M. The dynamic surface structure promotes O * ─O * coupling, while the oxophilic nature of M compensates for the inherent weakening of the metal = O * bond during OER. Because of that, the catalyst exhibits outstanding OER performance, along with excellent catalytic durability over 1200 h’ PEM testing.
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产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2022
·
IF 6.056
Yujiao Cheng,Guijie Li,Houjiu Wu,Guolu Liang,Hua Wang
Commercial mandarin juice often exhibits flavor deterioration during storage. The changes in volatile flavor profiles were investigated in mandarin juice stored under three different temperature conditions (4 °C, 25 °C, and 40 °C). The application of multidimensional gas chromatography-mass spectrometry/olfactometry (MDGC-MS/O) coupled with aroma extract dilution analysis (AEDA) identified 31 odorants in stored mandarin juice, including seven off-flavor contributing compounds: methanethiol (unpleasant, repulsive), dimethyl sulfide (sulfur, cabbage), methional (cooked potato), p -cymene (solventy), 4-vinylguaiacol (medicine), terpinen-4-ol (wood), and α-terpineol (floral, mint). 4-Vinylguaiacol was also identified in mandarin juice for the first time. In addition, 64 volatile compounds determined by GC-MS/pulsed flame photometric detector (GC-MS/PFPD) were classified as alcohols, terpenes, volatile sulfur compounds (VSCs), aldehydes, esters, ketones, and phenols. Volatile compound differences were observed in mandarin juice under different storage conditions by heat-map generation and principal component analysis (PCA). The results revealed that high-temperature storage led to a rapid increase in the concentration of total alcohols and VSCs. Furthermore, the flavor deterioration markers α-terpineol and dimethyl sulfide were identified based on off-flavor contribution and variable importance in projection (VIP) (score >1) values in the PLS-DA model. These two compounds are valuable for marker-assisted flavor deterioration analysis in mandarin juice during storage.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Fengnian Zhang,Fuhao Cheng,Chufei Cheng,Meng Guo,Yufeng Liu,Yang Miao,Feng Gao,Xiaomin Wang
Abatract A series of compositionally complex fluorite oxides (CCFOs) were prepared by ball milling the mixture of ZrO 2 , HfO 2 , Y 2 O 3 , La 2 O 3 , and Pr 6 O 11 followed by conventional solid-state sintering. Both XRD and TG-DSC results demonstrated that single-phase (Zr 0.2 Hf 0.2 Pr 0.2 Y 0.2 La 0.2 )O 2-δ was formed at 1400 °C. Elements in bulk ceramic were uniformly distributed without evident accumulation according to SEM-EDS pictures. TEM results revealed that polycrystalline ceramic powder was assignable to cubic Fm-3m fluorite structure. The electrical conductivity ( σ ) was measured via EIS technology and activation energy ( E a ) of CCFOs was calculated in Arrhenius plots. In the temperature range of 300-750 °C, CCFOs preserved the same conduction mechanism and (Zr 0.1667 Hf 0.1667 Pr 0.1667 Y 0.25 La 0.25 )O 2-δ possessed higher σ and lower E a than other high entropy fluorite oxides which is related to the incorporation of Pr element or the connection of cation-V o complex.
研究领域:
材料科学
·
无机非金属材料
·
固体离子学
·
功能陶瓷
·
能源材料
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Shuaiqi Han,Jingjing Jiang,Xinge Liu,Bingyan Li,Kangjie Zhang,Shasha Hao,Shaotang Yu,Weibo Yan,Hao Xin
The state-of-the-art copper indium gallium selenide Cu(In,Ga)Se2 (CIGS) thin-film solar cells are fabricated based on vacuum methods and use cadmium sulfide as the buffer layer. Considering the cost-effective production and environmental safety, fabrication of a CIGS absorber via the solution process and using a cadmium-free buffer layer is desirable. Here, we report engineering of a chemical-bath-deposited zinc sulfoxide Zn(S,O) buffer layer for solution-processed CIGS solar cells. Our results show that optimization of the deposition time and annealing process of the Zn(S,O) film to avoid cracking is critical to obtain a dense and uniform Zn(S,O) buffer layer. Benefited from the large band gap of Zn(S,O) and light-soaking-induced device performance improvement, a champion CIGS solar cell with a power conversion efficiency of 12.0% (without antireflection coating) has been achieved. This is the first time that the Zn(S,O) buffer layer has been applied to a solution-processed CIGS absorber and achieves highly efficient CIGS solar cells. The effect of light-soaking on the heterojunction property and the stability of device performance are discussed.
研究领域:
光伏技术
·
材料科学
·
薄膜太阳能电池
·
可再生能源
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Huachao Tao,Shaolin Du,Fei Zhang,Lingyun Xiong,Yaqiong Zhang,Hui Ma,Xuelin Yang
Carbon materials with high initial Coulombic efficiency (ICE) and specific capacity in lithium-ion batteries are highly attractive. Herein, P-doped carbon has been prepared, and as an anode for lithium-ion batteries, it exhibits remarkably improved ICE and reversible capacity. P atoms are apt for the formation of the P–O bond in carbon with oxygen-containing groups. The doped P content strongly depends on the O content in carbon. The high-doped P content of 5.79 at. % can be obtained through changing the O content in carbon. Carbon with high contents of P and O displays high ICE and capacity as an anode for lithium-ion batteries. The P–O bond in carbon changes the morphology and composition of the solid electrolyte interface (SEI) layer and is beneficial to the formation of a thin and dense SEI layer. The P–O bond in carbon prevents the permeation and decomposition of solvated PF6– in the interior of the electrode during cycling, resulting in the improved ICE, reversible capacity, and rate capability. As an anode for lithium-ion batteries, the ICE can be improved to 70.9% for carbon with the P–O bond from 36.9% for carbon without the P–O bond. Carbon with the P–O bond displays high specific capacities of 566 mA h g–1 after 100 cycles at 0.1 A g–1 and 432 mA h g–1 after 1000 cycles at 1 A g–1. This design offers a simple and efficient method to improve the ICE and reversible capacity of hard carbon.
研究领域:
材料科学
·
储能
·
电化学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2023
·
IF 11.4
Guoquan Liu,Pengfei Wang,He Zhang,Yi Li,Sihui Zhan
Improving the reaction rate of each step is significant for accelerating the multistep reaction of NO reduction by H2. However, simultaneously enhancing the activation of different gaseous reactants using single-atom catalysts remains a challenge to maximize the activity. Herein, we propose a strategy that utilizes titanium-vacancy-regulated electronic properties of single atoms and defective support (Pt1/d-TiO2) to facilitate electron transfer from edge-share O atoms (OTi) to adjacent Pt single atoms. This leads to the formation of low-valence Pt and unsaturated-charge OTi sites, which causes the catalytic reaction to follow a synergistic mechanism. Specifically, experimental and theoretical analyses demonstrate that low-valence Pt sites finely tune the adsorption of H2 molecules, consequently lowering the dissociation energy from 0.15 to as low as 0.01 eV. Moreover, using quasi-in situ spectroscopy, we clearly observe NO molecules being adsorbed on interfacial oxygen sites of a defective support. Then, the bond energy of the N–O bond is weakened through an electron acceptance–donation mechanism between unsaturated-charge OTi sites and NO, thereby facilitating NO activation. The designed single-atom catalysts with synergistic sites exhibit unmatched activity at low temperatures (above 90% NOx conversion at 100 °C), along with higher turnover frequency value (0.74 s–1) and superior stability, making them potentially suitable for industrial applications.
研究领域:
催化化学
·
环境化学
·
材料科学
·
表面科学
·
纳米技术
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DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 10
·4097-4103
·
IF 4.569
Zhikang Chen,Kewang Zhang,Bei Zhang,Jun Zhang
A new borate, Na2SrB16O26, was synthesized by the high-temperature solution method. It exhibits complicated interpenetrating 3D B–O frameworks composed of the functional building block (FBB) [B8O16]. The UV-vis-NIR diffuse reflectance spectroscopy shows that it has a deep-ultraviolet (DUV) cutoff edge (<200 nm). The relationship between the structures and optical properties was uncovered by theoretical calculations. By the first-principles calculation, the birefringence is estimated to be 0.07 at 1064 nm. The response electron distribution anisotropy (REDA) analysis indicates that the [BO3] units contribute mainly to the generation of the moderate birefringence.
研究领域:
材料科学
·
无机化学
·
光学材料
·
非线性光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ORGANOMETALLIC CHEMISTRY
·
2021
·
IF 2.369
Ke Cao,Ji Wu,Cai-Yan Zhang,Li-Fang Ding,Junxiao Yang
A palladium catalyzed intramolecular amination of B(7)-H for synthesis of o -carborane fused isoquinolinones has been developed. Kinds of o -carborane fused isoquinolinones decorated with active groups have been synthesized with good to excellent yields. A plausible mechanism involving palladium catalyzed electrophilic B-H activation/amination was proposed.
研究领域:
有机化学
·
催化化学
·
硼化学
·
药物化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Peng Liu,Qiang Ru,Peiming Zheng,Zhenglu Shi,Yang Liu,Chiquan Su,Xianhua Hou,Shichen Su,Francis Chi-Chung Ling
Currently, there are three primary obstacles to the development of high-performance supercapacitors: low electron conductivity of the electrode materials used, their poor ion-transport efficiency, and the unstable structure. Herein, to overcome these obstacles, one-dimensional Zn 2 GeO 4 (ZGO) rods were grown within a carbon nanotube (CNT) framework using a simple one-step hydrothermal strategy for use as a supercapacitor electrode material. The crosslinked ZGO/CNT-O hybrid exhibits a large contact surface area with respect to electrolytes, contains abundant electrochemical active sites, and has short ion-diffusion paths. Further, the flexible CNTs act as superior connective bridges, promoting electron transmission and resulting in a stable structure. The ZGO/CNT-O hybrid showed a specific capacitance of 164.25 F/g at a current density of 1 A/g. It also displayed superior cycling durability, exhibiting a specific capacity of 120 F/g at a current density of 10 A/g, even after 200,000 cycles. A simple crosslinking strategy and prolonged cycle durability are demonstrated, which endow ZGO/CNT-O with potential for use in supercapacitor electrodes.
研究领域:
材料科学
·
储能
·
纳米技术
·
电化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）