Materials Chemistry Frontiers
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2022
·Vol. 6
·期 23
·3567-3576
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IF 8.683
Peng-Fei Li,Chun-Li Hu,Fang Kong,Jiang-Gao Mao
The exploration of new birefringent materials in the d10 transition metal sulfate selenite system resulted in three new compounds, namely, Hg2(SeO3)(SO4), La2Hg3(SeO3)4(SO4)2(H2O)2 and Ag2Cd(Se2O5)(Se0.3S0.7O4), using mild hydrothermal methods. Hg2(SeO3)(SO4) shows a 3D structure composed of 2D mercury selenite layers connected by 1D mercury sulfate chains; La2Hg3(SeO3)4(SO4)2(H2O)2 features a novel 3D network composed of 1D lanthanum sulfate chains and 2D mercury oxide layers, which are connected by a SeO3 triangular pyramid bridge; Ag2Cd(Se2O5)(Se0.3S0.7O4) exhibits a novel 3D framework that consists of selenate silver layers bridged by SO4 tetrahedra and CdO6 octahedra. These compounds can remain stable above 250 °C and their optical band gap values are larger than 3.5 eV. The birefringence (Δn) of Hg2(SeO3)(SO4) was calculated to be 0.133 at 532 nm and 0.126 at 1064 nm. Hg2(SeO3)(SO4) was proved as the first reported metal selenite sulfate exhibiting a large birefringence. In addition, the IR spectra, TG-DSC curves and theoretical calculations of the three compounds were studied.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
ACS Catalysis
·
2021
·
IF 13.084
Jinqiu Guo,Zongjing Feng,Jun Xu,Jie Zhu,Guanghui Zhang,Yaping Du,Hongbo Zhang,Chunhua Yan
Ethanol transformation with high product selectivity is a great challenge, especially for high weight molecules. Here, we show a combination study of kinetic, thermodynamic, and in situ spectroscopy measurements to probe the selective upgrading of ethanol over lamellar Ce(OH)SO4·xH2O catalysts, with 60–70% Ce3+ preserved during the catalysis. High methyl phenols (MPs) selectivity at ∼80% within condensation products was achieved at ∼50% condensation yield (3.0 kPa C2H5OH, 15 kPa H2, Ar balanced, 693 K, 1 atm, gas hourly space velocity (GHSV) ∼5.4 min–1), with acetaldehyde, acetone, 4-heptanone, and 2-pentanone as the key reaction intermediates. Kinetic measurements with the assistance of isotope labeling proved that MPs generated from the kinetically relevant step (KRS) of C–C bond coupling of enolate nucleophilically attacks surface C2H4O following a Langmuir–Hinshelwood model. Low ethanol and water pressures and high acetaldehyde and hydrogen pressures were proved to be favored for MPs generation rather than dehydration, in which hydrogen could reduce the amount of lattice oxygen and facilitate the preparation of MPs while water and ethanol both compete with acetaldehyde for active sites during catalysis. On the basis of in situ X-ray diffraction (XRD), quasi-in situ X-ray photoelectron spectroscopy (XPS), and Raman characterizations, the Ce(OH)SO4 crystal structure was proved to be maintained along with ethanol activation, and the Ce3+–OH Lewis acid–base pair was proved to be the active species for the selective C–C bond coupling. The KRS assumption was also supported by the apparent activation energy assessment within the reaction network on dehydration, dehydrogenation, aldol condensation, and cyclization and a series of negligible kinetic isotope effects (KIEs). This system can be easily extended to some other systems related to C–C bond coupling and is attracting attention on converting oxygenate platform molecules over lanthanide species.
研究领域:
化学工程
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催化
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材料科学
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物理化学
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产品关联
DOI
高影响因子
Metals
·
2024
·Vol. 14
·期 10
·1142
·
IF 2.6
Jiabao Li,Yang Cai,Jianling Huang,Shiqian Zhao,Deliang Cheng
Mg-based alloy anodes suffer from severe corrosion in alkaline electrolytes, which substantially impedes their cycle life and thereby limits their suitability as anode materials for nickel–metal hydride (Ni-MH) batteries. This work modifies the conventional 6 M KOH electrolyte by adding 0.1 M Al2(SO4)3·18H2O. The electrochemical hydrogen storage properties of Mg0.45Ti0.05Ni0.50alloy in this electrolyte and its microstructural evolution during cycling are studied. In the 6 M KOH + 0.1 M Al2(SO4)3·18H2O electrolyte, a protective layer consisting of Mg2Al(OH)7is formed on the surface of the Mg0.45Ti0.05Ni0.50alloy anode during charge/discharge cycling instead of Mg(OH)2, effectively preventing further corrosion and improving its cycle life. The Mg0.45Ti0.05Ni0.50alloy anode delivers a maximum discharge capacity of 479.0 mAh g−1and maintains 318.4 mAh g−1after 30 cycles in the 6 M KOH + 0.1 M Al2(SO4)3·18H2O electrolyte, which is significantly superior to that achieved in the 6 M KOH electrolyte (471.1 mAh g−1and 201.8 mAh g−1, respectively). This work provides a new strategy for improving the cycle stability of Mg-based alloy anodes.
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Qi Wang,Shaoxin Song,Ning Nie,Jinshan Tan,Wei Wang
The accurate and sensitive detection of hydrogen peroxide (H 2 O 2 ) is of practical significance in the fields of bioanalysis, medicine, environmental protection as well as food industry. Herein, we design and fabricate NaTb(SO 4 ) 2 nanoparticles (NPs) as novel fluorescent nanoprobes for H 2 O 2 detection. The design strategy is based on the fluorescence quenching occurred during the oxidation of Tb(III) to Tb(IV) upon H 2 O 2 addition. The sensing of NaTb(SO 4 ) 2 NPs to H 2 O 2 is in a “turn-off” mode, and the sensitivity is tunable by the pH due to the pH-dependence of the oxidizing ability of H 2 O 2 . Superior to most of the reported H 2 O 2 sensors, NaTb(SO 4 ) 2 NPs exhibit reliable stability in acidic environment and a more sensitive response to H 2 O 2 with a limit of detection (LOD) down to 0.047 μM at pH = 3.2. Based on its high sensitivity and reliable stability, the NaTb(SO 4 ) 2 NPs is anticipated to find potential applications in the field of biosensors.
研究领域:
生物分析
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医学检测
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环境科学
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食品工业
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2020
·
IF 6.182
Xiaojun Guo,Yanan Xu,Fei Zha,Xiaohua Tang,Haifeng Tian
Hematite (α-Fe 2 O 3 ), as one of Fenton reagents, is widely investigated for the treatment of wastewater in the field of advanced oxidation processes (AOPs). Considering the fast charge carrier recombination of hematite (α-Fe 2 O 3 ), we have successfully synthesized a novel and high active heterogeneous Fenton catalyst α-Fe 2 O 3 /Cu 2 O(SO 4 ) for the degradation of organic pollutants. The results show that the as-obtained Cu 2 O(SO 4 )-Fe9 composite exhibits excellent degradation properties of Orange II. 98.9% degradation rate was achieved for 100 mL of 50 mg/L Orange II solution in the condition of 0.3 g/L Cu 2 O(SO 4 )-Fe9 catalyst, 3 mM H 2 O 2 and pH = 3.5. The degradation rate constants of Cu 2 O(SO 4 )-Fe9 in the photo-Fenton-like system are 9.33 and 4.07 times of Cu 2 O(SO 4 ) and α-Fe 2 O 3 , respectively. In addition, the mechanism and pathway for the degradation of Orange II were proposed. The scheme of combining copper-based oxysulfate Cu 2 O(SO 4 ) with hematite (α-Fe 2 O 3 ) could improve the efficiency of charge carrier separation, which will further enhance the catalytic activity and expand its application in water purification.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
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2020
·Vol. 8
·期 1
·164-172
·
IF 5.958
Peng-Fei Li,Chun-Li Hu,Fang Kong,Shao-Ming Ying,Jiang-Gao Mao
Two new yttrium sulfate tellurites, namely, Y3(TeO3)2(SO4)2(OH)(H2O) and Y2(Te4O10)(SO4), were achieved in our exploration of new sulfate tellurites, with a large birefringence in the Y3+–Te4+–SO42− system. The two compounds exhibit two new three dimensional (3D) frameworks composed of different yttrium tellurite layers bridged by sulfate tetrahedra. The tellurite groups in Y2(Te4O10)(SO4) polymerized together into a unique (Te4O10)4− 1D double-strand with an eight-member polyhedral ring tunnel along the a-axis. Optical diffuse reflectance spectra showed that the two compounds present a wide energy band gap with Eg values of 4.4 and 4.1 eV respectively. The birefringence values of Y3(TeO3)2(SO4)2(OH)(H2O) and Y2(Te4O10)(SO4) were calculated to be 0.092 and 0.149 at 532 nm respectively. Furthermore, the anhydrous Y2(Te4O10)(SO4) features a large birefringence, wide energy band gap and high thermal stability. In addition, the IR spectrum, TG-DSC curve and theoretical calculations of the title compound were recorded in this paper.
研究领域:
材料科学
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光学材料
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无机化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Yilei Sun,Yao Liu,Haixia Wang,Ze-da Meng,Jae Doc Na,Won-Chun Oh
Sodium-based polyanionic compounds are being widely explored as positive electrode materials for sodium-ion batteries due to the advantages of elevated operating voltage plateaus and exceptional cycling stability. This work investigates the charge/discharge characteristics of a newly developed NASICON-type polyanionic cathode, NaFe2PO4(SO4)2 (NFPS), through X-ray diffraction refinement and cyclic voltammetry. Subsequently, the electrochemical activity is significantly enhanced by Mn2+ doping. Electrochemical testing reveals that Na0.84Mn0.08Fe2PO4(SO4)2 achieves higher capacity and improved rate performance, surpassing pristine NFPS. At a current density of 25 mA g-1, the maximum discharge specific capacity of NFPS-Mn0.08 is 73 mA h g-1. After 60 cycles, the discharge capacity of NFPS-Mn0.08 is 52.7 mA h g-1.
研究领域:
材料科学
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电化学
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储能技术
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无机化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
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2022
·
IF 13.4
Zhen Wang,Yangyi Yu,Qin Guo,Chaoting Guan,Jin Jiang
Multiple reactive intermediates have been proposed to be involved in peroxydisulfate (PDS) activation by zerovalent iron (ZVI), including sulfate radical (SO 4 ·− ) produced via iron-oxide shell mediated electron transfer, ferryl ion species (Fe(IV)) formed from Fe(II)-PDS interaction, and hydroxyl radical ( · OH) generated by ZVI aerobic oxygenation. In this study, evolution of the relative role of these intermediates in microscale and nanoscale ZVI (mZVI vs. nZVI) activated PDS processes is comparatively investigated by using a methyl phenyl sulfoxide (PMSO) probe that selectively reacts with Fe(IV) to produce methyl phenyl sulfone (PMSO 2 ). Interestingly, during PMSO transformation by mZVI/PDS process, yields of PMSO 2 (η(PMSO 2 )) exhibit three-stage behavior that they first increase to a maximum (∼80% but lower than 100%) (Stage I) and then plateau for a period (Stage II) followed by a decrease phase (Stage III). Accordingly, the relative role of Fe(IV) in PMSO transformation is unceasingly improved in Stage I and subsequently reaches equilibrium with that of free radicals in Stage II, while it finally decreases in Stage III. Similar η(PMSO 2 ) evolution trends are obtained in nZVI/PDS process, except that the η(PMSO 2 ) increase in Stage I is negligible, possibly due to the exceptional fast nZVI dissolution. It was further clarified by tert -butyl alcohol scavenging assay that, in addition to Fe(IV), the free radical involved in Stages I and II is SO 4 ·− , while · OH was dominant in Stage III. Moreover, studies on O 2 effect reveal that ZVI aerobic oxygenation participates in mZVI corrosion during the entire process, while it is only involved in nZVI corrosion when PDS content is reduced to a low concentration, indicating that the reactivities of PDS and O 2 are similar in mZVI corrosion, but differ greatly in nZVI corrosion. Additionally, effects of reactant dose and pH on η(PMSO 2 ) evolution are also explored. Dynamics of the relative role of different reactive oxidants should be taken into account in further applications of ZVI/PDS in situ chemical remediation technology considering their different chemistries.
研究领域:
环境科学
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化学工程
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水处理
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DOI
高影响因子
CRYSTAL RESEARCH AND TECHNOLOGY
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2024
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IF 1.5
Luyong Zhang,Shibin Wang,Zhencheng Wu,Xueling Hou,Zhihua Yang,Fangfang Zhang,Shilie Pan
Tetrahedral oxygenated groups with large highest occupied molecular orbital-lowest unoccupied molecular orbital (H gaps such as [SO 4 ] are beneficial for deep ultraviolet (DUV) transmission but usually make against generating sufficient birefringence due to the small polarizability anisotropy. Thus, it is extremely difficult to obtain DUV transmission and large birefringence simultaneously in the search for DUV birefringent materials in sulfates. Herein, two new ammonium-rare earth metal sulfates, NH 4 Y(SO 4 ) 2 ·H 2 O and NH 4 YSO 4 F 2 , with DUV transmission are presented. Meanwhile, both exhibit greatly elevated birefringence through the involvement of NH 4 + units, compared to Y 2 (SO 4 ) 3 ·8H 2 O. Their optical properties are further investigated by theoretical calculations, and the effect of the introduction of NH 4 + into yttrium sulfate on optimizing the structures and properties is discussed. This work may provide a new perspective for further exploration of DUV birefringent materials in tetrahedral oxygenated group sulfates.
研究领域:
材料科学
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光学
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晶体学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2025
·
IF 7.3
Xiaohua Jing,Jianying Huang,Jiani Shi,Zihan Zhao,Jingbo Hao,Xiaoning Tang
In this study, five novel ionic liquids (ILs), namely [N888][Cyanex 272], [N888][P507], [N888][Cl], [N888][NO3], and [N888]2[SO4], were synthesized through an organic acid–base reaction, followed by separation using rotary evaporation. Their structures were confirmed by 1H and 13C NMR spectroscopy, showing full consistency with theoretical predictions and no impurity peaks. Under identical extraction conditions, the ILs exhibited the following separation efficiency order for Co2+ from Ni2+: [N888]2[SO4]>[N888][Cl] > [N888][P507] > [N888][Cyanex 272]>[N888] [NO3]. Density functional theory (DFT) calculations revealed that these differences in separation performance arose from variations in the ionic radii of the IL anions. With a simple single-stage extraction under optimized conditions, [N888]2[SO4] enabled near-complete separation of Co2+ from Ni2+, achieving an extraction efficiency of 99.5 ± 2.14% and a separation factor approaching + ∞. Thermodynamic analysis confirmed that the extraction process was endothermic and nonspontaneous. The Co2+ -loaded IL-based extraction phase was efficiently stripped using diluted sulfuric acid, with a stripping efficiency of 99.3 ± 0.57%. Using sodium hydroxide as a precipitant, the solid powder of Co(OH)2 was obtained from the Co2+-containing aqueous phase. Co(OH)2 was characterized qualitatively and quantitatively by XRD and ICP-OES, and its morphology was also analyzed using SEM. The recycled IL-based extraction phase, after activation with dilute sulfuric acid, was analyzed via FT-IR spectroscopy. This regenerated IL-based extraction phase was reused for the separation of Co2+ from Ni2+, showing no degradation in performance after three cycles. Based on these findings, a process flowchart was designed for the efficient preparation of Co(OH)2 from minerals or secondary resources using the [N888]2[SO4]-based extraction phase.
研究领域:
化学工程
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材料科学
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环境科学
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无机化学
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分离技术
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产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Wei Yang,Qi Liu,Qiang Yang,Xinyu Zhang,Zhuolin Yang,Daobin Mu,Li Li,Renjie Chen,Feng Wu
Sodium-ion batteries are increasingly recognized as ideal for large-scale energy storage applications. Alluaudite Na 2+2 δ Fe 2− δ (SO 4 ) 3 has become one of the focused cathode materials in this field. However, previous studies employing aqueous-solution synthesis often overlooked the formation mechanism of the impurity phase. In this study, the nonequilibrium evolution mechanism between Na 2+2 δ Fe 2− δ (SO 4 ) 3 and impurities by adjusting ratios of the Na 2 SO 4 /FeSO 4 ·7H 2 O in the binary system is investigated. Then an optimal ratio of 0.765 with reduced impurity content is confirmed. Compared to the poor electrochemical performance of the Na 2.6 Fe 1.7 (SO 4 ) 3 (0.765) cathode, the optimized Na 2.6 Fe 1.7 (SO 4 ) 3 @CNTs (0.765@CNTs) cathode, with improved electronic and ionic conductivity, demonstrates an impressive discharge specific capacity of 93.8 mAh g −1 at 0.1 C and a high-rate capacity of 67.84 mAh g −1 at 20 C, maintaining capacity retention of 71.1% after 3000 cycles at 10 C. The Na 2.6 Fe 1.7 (SO 4 ) 3 @CNTs//HC full cell reaches an unprecedented working potential of 3.71 V at 0.1 C, and a remarkable mass-energy density exceeding 320 Wh kg −1 . This work not only provides comprehensive guidance for synthesizing high-voltage Na 2+2 δ Fe 2− δ (SO 4 ) 3 cathode materials with controllable impurity content but also lays the groundwork of sodium-ion batteries for large-scale energy storage applications.
研究领域:
材料科学
·
电化学
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能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2016
·
IF 2.101
Xiaoniu Yu,Chunxiang Qian
Nano-sized CePO 4 @NaCe(SO 4 ) 2 (H 2 O) and CePO 4 with hexagonal phase have been prepared by simply varying the reactant P/Ce molar ratio in bacterial liquid. The phase composition of two samples was checked via Fourier transform infrared spectroscopy (FTIR), energy dispersive analysis of X-rays (EDS) and X-ray diffraction (XRD) analyses, displaying the presence of CePO 4 @NaCe(SO 4 ) 2 (H 2 O) and CePO 4 with average crystallite size are 32.34 and 15.61 nm, respectively. The scanning electron microscopy (SEM) images show that nano-clusters and sphere-like in shape with a narrow diameter distribution were observed in two samples. The transmission electron microscopy (TEM) photographs further indicate obtained CePO 4 @NaCe(SO 4 ) 2 (H 2 O) and CePO 4 nanoparticles correspond to nanosheets and nanorods , respectively. The emission spectra of CePO 4 @NaCe(SO 4 ) 2 (H 2 O) and CePO 4 display a broad band of 300–380 nm range with the strongest emission at 342 nm in the violet region.
研究领域:
材料科学
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纳米技术
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化学
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生物学
✓ 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）