ELECTROANALYSIS
·
2021
·Vol. 34
·期 12
·1877-1883
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IF 3.223
Yuan Xue,Yong Xia,Yanchao Han,Chao Peng,Jing Li,Erkang Wang
The development of the hot electron-induced cathodic electrochemiluminescence (HECL) often accompanied with the advance in the electrode materials and instruments. In this work, dimethyl silicone oil was employed as the coating layer for initiating the HECL. The insulating layer was obtained by simple drop casting and subsequent polishing, which could withstand high voltage and meet the requirement of HECL. With the as-prepared interface, the quantitative detection of puerarin in the aqueous solution was achieved based on the quenching effect on the SO 4 ⋅ − .
研究领域:
分析化学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Chongyang Yuan,Wei Chen,Zunxian Yang,Zhenguo Huang,Xuebin Yu
MgH 2 is regarded as a potential hydrolysis material for the hydrogen generation due to its high theoretical hydrogen yield, abundant source on earth and environmentally friendly hydrolysates. However, the quickly formed passive magnesium hydroxide layer on the surface of MgH 2 will hinder its further hydrolysis reaction, leading to sluggish reaction kinetics and low H 2 yield. In this paper, we explore the improvement of different anions and cations in solutions for the hydrolysis of MgH 2 . It is found that the cations in the solution promote the reaction rate of MgH 2 hydrolysis through the hydrolysate-induced growth effect, among which the fastest hydrogen yield can get 1664 mL/g within a few minutes in the Fe 2 (SO 4 ) 3 solution. As for the anions, it enables different microstructures of the Mg(OH) 2 hydrolysate which give rise to enhanced water utilization. Specially, for the mixed 0.5 M MgCl 2 + 0.05 M MgSO 4 solution, the water utilization rate attains the optimum value of 51.3 %, much higher than that of the single MgCl 2 or MgSO 4 solutions. These findings are of great significance for the application of MgH 2 hydrolysis as hydrogen generation.
研究领域:
材料科学
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化学工程
·
氢能
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Hui Yang,Ziyu Wang,Cuixia Xu,Yuan Lin,Guoliang Liu
The first example of lanthanide borate-sulfate compound, namely, La 2 B 3 O 4 (OH) 3 (SO 4 ) 2 has been obtained through hydrothermal synthesis , which belongs to polar space group Pna 2(1) (No. 33). Its structure possesses double lanthanum sulfate layers in the ab plane in which the lanthanide ions are bridged by SO 4 tetrahedra. These layers are further cross-linked by borate chains into the final 3D framework. It is noteworthy that this compound is the first lanthanide borate-sulfate which crystalizes in polar space group and it displays second-harmonic generation (SHG) signal of about 0.1 times that of KH 2 PO 4 . The SHG coefficient of the compound is ascribed to the synergistic effect of SO 4 units and borate units. Meanwhile, distorted LaO x polyhedra also play an important role in the contribution to SHG response.
研究领域:
材料科学
·
晶体学
✓ 已验证
DOI
高影响因子
MOLECULES
·
2026
·Vol. 31
·期 11
·1908
·
IF 5.1
Wei Cao,Lifang Chen,Tingting Wang,Ke Wang,Zhen Song,Zhiwen Qi
In order to address corrosion and pollution problems of liquid acids and limitations of traditional solid acids, sulfated MOF-808-SO4catalysts were developed by creating unsaturated sites in MOF-808 for sulfate grafting with ligand defect engineering. Characterization verified framework integrity, successful sulfate coordination, and maintenance of high surface areas and tunable porosity. Temperature-programmed desorption of ammonia (NH3-TPD) establishes a clear consistent trend between defect density and the concentration as well as the strength of acid sites, indicating that a higher degree of ligand deficiency promotes the formation of more abundant and stronger acid centers. For esterification of acetic acid with n-butanol, the catalyst prepared by replacing 40 mol% of BTC with BDC achieved ≥99% conversion of acetic acid under mild conditions of 2.0 wt% catalyst loading and 1:2 alcohol/acid molar ratio at 120 °C for 6 h, outperforming conventional solid acids. This performance stems from high-density strong Brønsted acid sites strongly coordinated at defects and an open pore structure facilitating diffusion. The catalyst was easily recovered by ethanol washing and maintained stable activity over five cycles without loss of catalytic capability. This work suggests defect engineering as an effective strategy for tuning acidity and catalytic performance in MOF-based solid acids for green esterification.
✓ 已验证
DOI
PubMed
高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2016
·Vol. 642
·期 4
·343-349
·
IF 1.261
Xiao Zhao,Dajiang Mei,Jingli Xu,Yuandong Wu
Three compounds A Sb 2 (SO 4 ) 2 (PO 4 ) ( A = H 3 O + , K, Rb) were obtained from the reactions of Sb 2 O 3 , A 2 CO 3 ( A = Li, Rb) or K 2 SO 4 and NH 4 H 2 PO 4 in H 2 SO 4 (98 %) at 220–250 °C. Their structures were determined by single-crystal X-ray diffraction. All compounds crystallize in the triclinic space group P (no.2) and are isostructural. The crystal structures consist of two-dimensional 2 ∞ [Sb 2 (SO 4 ) 2 (PO 4 )] – anionic layers and alkali cations, which are located between anionic layers. The anionic layers are composed of [SbO 4 ] ψ-trigonal bipyramids, [SbO 5 ] ψ octahedra, [SO 4 ] tetrahedra, and [PO 4 ] tetrahedra. All compounds are characterized by solid state UV/Vis/NIR diffuse reflectance spectra, FT-IR spectroscopy, and Raman spectroscopy.
研究领域:
化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Processes
·
2024
·Vol. 12
·期 12
·2670
·
IF 2.8
Ke-Hong Chen,Ao-Tian Gu,Liang Zhang,Hao Tang,Zhi-Ming Zhang,Yi-Ming Zhou,Yu-Qi Cheng,Yi Yang
Chloramphenicol antibiotics (CAPs) are broad-spectrum antibiotics, and excessive consumption has led to increasingly dangerous residues in the environment. The accumulation of these highly toxic and difficult-to-biodegrade CAPs and their long-term exposure in ecological environments can pose insidious and long-term hazards to human health and aquatic organisms. In this study, co-carbon composite nanocatalysts (CoxZn10−x-NC) with many carbon nanotubes on the surface were prepared via the one-step pyrolysis of bimetallic CoxZn10−x-ZIF with different Co/Zn ratios and used for the degradation of trace amounts of CAPs in a water column. The microstructure and chemical composition of the prepared catalysts were fully characterized using SEM, TEM, and XPS. The CAP degradation experiments demonstrated that Co6Zn4-NC in CoxZn10−x-NC possessed the highest catalytic activity level, removing 100% of the CAPs in 60 min. The CAPs had a corresponding reaction rate constant of 0.22 min−1, and Co6Zn4-NC was able to completely mineralize 44.57% of them. Doping moderate amounts of Zn can effectively improve the carbon nanotube structure on the catalyst surface and promote the generation of monoatomic Co, thus improving catalytic activity. The results of the free-radical burst experiments and electron paramagnetic resonance (EPR) showed that the free-radical pathway mainly dominated within the Co6Zn4-NC+PMS system, in which SO4•−was the main ROS for CAP degradation.
研究领域:
环境科学
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材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2016
·
IF 3.847
Xinping Ouyang,Tao Ruan,Xueqing Qiu
Lignin was hydrothermal oxidation depolymerized by using H 2 O 2 as the oxidant and CuO/Fe 2 (SO 4 ) 3 /NaOH as catalysts. The effect of the solvents, including water, methanol, 1,4-dioxane, tetrahydrofuran , ethanol, and their co-solvent, on the depolymerization of lignin were investigated. It is found that the yield of monophenolic compounds reaches 17.92% by using 1:1 (v/v) of methanol/water as the reaction medium. The suitable proportion of methanol to water not only effectively maintains the alkalinity of the reaction medium and the solubility of lignin, but also suppresses the demethoxylation during the process of depolymerization reaction, resulting in an increase of contents of syringyl style monophenolic compounds which prevents the re-polymerization. Consequently, the yield of monophenolic compounds is increased.
研究领域:
化学工程
·
有机化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2025
·
IF 6.6
Jiachen Li,Biao Hu,Hui Wang,Jinxin Yang,Chunwang Li,Xin Du
A eutectic hydrate salt phase change material composed of NH 4 Al(SO 4 ) 2 ·12H 2 O-CH 3 COONa·3H 2 O was prepared. The eutectic composition, determined experimentally to consist of 92.5 wt% NH 4 Al(SO 4 ) 2 ·12H 2 O and 7.5 wt% CH 3 COONa·3H 2 O, deviated significantly from predictions made by the Scholar’s equation, highlighting the need for optimization of theoretical prediction methods. The eutectic material exhibited promising thermal storage properties, but a significant supercooling degree of 12.98 K was observed. To mitigate this issue, 14 different nucleating agents were evaluated and five nucleating agents were identified as effective in reducing the supercooling degree to below 1 °C. Furthermore, the thermophysical properties of the eutectic phase change materials with five preferred nucleating agents, including phase change temperature, latent heat, volume expansion ratio and thermal storage density, were characterized using differential scanning calorimetry, T-history, and solid–liquid density testing. Among the five preferred nucleating agents, Nano Cu demonstrated the best performance, achieving a high thermal storage density of 223.45 kJ/kg and a minimal volume expansion ratio of 4.92 %. Future studies will focus on optimizing heat transfer characterization and integrating this material into renewable energy-based heating systems such as heat pumps, solar heating systems, and valley electric heating systems to achieve sustainable and efficient heating solutions.
✓ 已验证
产品关联
DOI
高影响因子
Korean Journal of Materials Research
·
2025
·Vol. 35
·期 7
·266-276
·
IF 0.3
Yao Liu,Yilei Sun,Haixia Wang,Zeda Meng,Won-Chun Oh
Sodium-ion batteries (SIBs) offer a viable alternative to partially or fully replace lithium ion batteries (LIBs) due to their lower cost and increased safety. This paper outlines the compositional optimizations, crystallographic evaluations, and electrochemical behavior of a novel mixed NASICON polyanionic compound, NaFe2PO4(SO4)2 (NFPS). X-ray photoelectron spectrometry (XPS) results showed that cobalt doping produces a higher concentration of oxygen defects compared to undoped samples. Scanning electron microscopy (SEM) analysis results revealed that the modified sample has more uniform pores and pore distribution. Brunauer-Emmett-Teller (BET) measurements showed that doping of Co2+ reduces the specific surface area of NFPS-Co0.08 compared to NFPS. This shortens the sodium ion diffusion pathway and promotes ion dynamics. The addition of Co2+ to the sample significantly improved its performance during galvanostatic charge-discharge tests. The electrochemical activity also is significantly enhanced by Co2+ doping. Na0.84Co0.08Fe2PO4(SO4)2 exhibits superior rate and cycling performance compared to pristine NFPS. After 80 cycles at 25 mA g-1, NFPS-Co0.08 retained discharge specific capacity of 60.8 mA h g-1, which is 1.24 times greater than that of NFPS.
研究领域:
材料科学
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电化学
·
储能技术
·
无机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xiyue Zhang,Minjie Hou,Jianyong Zhang,Yingjie Zhou,Fupeng Li,Kun Ren,Xuantian Feng,Pengyu Dou,Sicheng Bi,Katsuro Hayashi,Lin Xu,Feng Liang
Alluaudite-type Na 2+2δ Fe 2- δ (SO 4 ) 3 , characterized by its cost-effectiveness and high operating voltage, has emerged as a prospective cathode material for sodium-ion batteries (SIBs). However, poor electronic conductivity and sluggish reaction kinetics hinder its practical application. In this study, we developed a low-strain spherical Na 2.5 Fe 1.75 (SO 4 ) 3 @C@KB (NFS@C@KB) cathode, enclosed within highly conductive Ketjen Black (KB) using a scalable spray-drying method. In-situ X-ray diffraction analysis revealed that the nearly zero-volume strain originates from the synergistic effect of the dense spherical configuration and pearl-like KB branched chains, effectively enhancing the structural stability and prolonging the cycle life. Moreover, the interconnected KB network establishes a continuous electron transport pathway, thereby improving the electronic conductivity. The optimized NFS@C@KB cathode delivered a capacity of 75 mAh g −1 at 5C and exhibited remarkable cycling stability over 4000 cycles. Even under the extreme condition of −20 °C, it retained a discharge capacity of 63 mAh g −1 at a rate of 1C. Consequently, the combination of a low-strain structure and outstanding electrochemical performance is expected to stimulate further exploration of iron-based sulfate cathodes and promote the development of rechargeable SIBs for energy storage applications.
研究领域:
储能技术
·
材料科学
·
电化学
·
无机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Jinwen Tan,Han Luo,Shiyi Wang,Ling Huang,Liling Cao,Xuehua Dong,Guohong Zou
A short-wave UV antimony(III) oxysalt, RbSb(SO4)(H2PO2)F, by incorporating three different anions (SO42-, H2PO2-, F-) with trivalent antimony cations that possess stereochemically active lone-pair electrons (SCALP), has been successfully synthesized. Significantly, the mixed anions and Sb3+ cations combine to form a low-dimensional 1D infinite anionic chain, denoted as [Sb(SO4)(H2PO2)F]∞-, where synergistic interactions among these units contribute to a substantial birefringence of 0.192 at 546 nm and achieve a short cutoff edge down to 276 nm. This research expands the family of UV birefringent optical materials and provides guidance for the further exploration of novel structural-functional materials.
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 ELECTRONIC MATERIALS
·
2025
·
IF 2.5
Liu Yao,Sun Yilei,Wang Haixia,Meng Zeda,Na Jae Doc,Oh Won-Chun
Owing to the natural abundance of sodium, sodium-ion batteries (SIBs) serve as a more cost-effective option compared with lithium-ion batteries (LIBs), while offering comparable energy storage capabilities. This study presents the compositional optimizations, structural characterizations, and electrochemical performance of a new mixed sodium (Na) superionic conductor (NASICON)-type polyanionic material, NaFe 2 PO 4 (SO 4 ) 2 (NFPS). Subsequently, the introduction of Ni 2+ doping serves to simultaneously improve the structural integrity and electronic conductivity of the material, leading to a collective enhancement of the sodium-ion diffusion channels. The Ni 2+ -incorporated phase, NaFe 1.92 Ni 0.08 PO 4 (SO 4 ) 2 , exhibits faster Na + diffusion, resulting in superior rate and cycling performance versus NFPS. After 80 cycles at 25 mA g −1 , NFPS-Ni 0.08 maintains a discharge capacity of 58.7 mA h g −1 , outperforming undoped NFPS by 20%.
研究领域:
材料科学
·
电化学
·
储能
·
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）