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学者姓名：王金淑
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摘要 ：
Heavy metal ions and organic pollutants cause irreversible damage to water environment, thereby posing significant threats to the well-being of organisms. The techniques of adsorption and photocatalytic degradation offer versatile solutions for addressing water pollution challenges, attributed to their inherent sustainability and adaptability. Silicates exhibit exceptional practicality in the realm of environmental protection owing to their structural integrity and robust chemical/thermal stability during hybridization and application process. Furthermore, the abundance of silicate reserves, coupled with their proven effectiveness, has garnered significant attention in recent years. This detailed review compiles and analyzes the extensive body of literature spanning the past six years (2018-2023), emphasizing the pivotal discoveries associated with employing silicates as water purification materials. This review article provides a comprehensive overview of the structure, classification, and chemical composition of diverse silicates and offers a thorough descriptive analysis of their performance in eliminating pollutants. Additionally, the utilization of diatomite as either precursors or substrates for silicates, along with the exploration of their corresponding purification mechanisms is discussed. The review unequivocally verifies the efficiency of silicates and their composites in the effective elimination of various toxic pollutants. However, the development of novel silicates capable of adapting to diverse environmental conditions to enhance pollution control, remains an urgent necessity.
关键词 ：
adsorbent adsorbent water purification water purification diatomite diatomite silicates silicates photocatalyst photocatalyst
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| GB/T 7714 | Xu, Meng , Wang, Jinshu , Wu, Junshu . Recent advances of silicate materials for wastewater treatment: a review [J]. | MATERIALS RESEARCH EXPRESS , 2024 , 11 (3) . |
| MLA | Xu, Meng 等. "Recent advances of silicate materials for wastewater treatment: a review" . | MATERIALS RESEARCH EXPRESS 11 . 3 (2024) . |
| APA | Xu, Meng , Wang, Jinshu , Wu, Junshu . Recent advances of silicate materials for wastewater treatment: a review . | MATERIALS RESEARCH EXPRESS , 2024 , 11 (3) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Dispenser cathodes are the most widely used electron emission source in vacuum electron devices. The impregnant is the source for producing active substances in the dispenser cathodes, which play an irreplaceable role. However, impregnants' phase structure and optical response properties have yet to be systematically investigated. Herein, four aluminates were prepared as impregnants via homogeneous-lyophilization followed by calcination. Due to the unique preparation process, the elemental distribution of aluminates is exceptionally uniform. Based on the first -principles DFT calculations, the primary phases of the two aluminates 532 and 411 were confirmed to be (Ba0.61Ca0.39)3Al(2)O(6) (P213) and (Ba0.75Ca0.25)4Al(2)O(7) (Cmca). At the same time, alpha-Ba2S- cAlO(5) and beta-Ba2ScAlO5 are the only phases of aluminates 411-0.75Sc and 411-1.25Sc, respectively. XPS confirmed two chemical states of Ba and Sc in the aluminates. FT-IR and 27Al NMR indicate that the aluminumoxygen skeleton in all aluminates exists mainly as [AlO4] tetrahedrons, accompanied by a small amount of distorted [AlOx] (x = 5, 6) polyhedrons. The UV-visible light absorption capacity, band gap and intra-structural electron transfer capacity of all aluminates are determined by UV-Vis DRS and PL spectra. The dispenser cathodes impregnated with aluminates 532 and 411 have zero -field current densities of 5.3 A/cm(2) and 14.3 A/ cm(2) at 1100Cb, respectively. The dispenser cathodes impregnated with aluminate containing scandium have different space -charge -limited current densities, i.e., 29.48 A/cm(2) for 411-0.75Sc and 13.66 A/cm(2) for 4111.25Sc at 1000Cb. This work will provide more options for synthesizing and applying impregnants.
关键词 ：
Aluminate Aluminate Dispenser cathode Dispenser cathode Electron emission Electron emission Homogeneous-lyophilization Homogeneous-lyophilization Phase structure Phase structure
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| GB/T 7714 | Cai, Yongfeng , Yang, Yunfei , Liu, Hexiong et al. Synthesis of impregnants for dispenser cathodes via homogeneous-lyophilization: Phase structure, optical response and emission property of four aluminates [J]. | CERAMICS INTERNATIONAL , 2024 , 50 (7) : 11341-11350 . |
| MLA | Cai, Yongfeng et al. "Synthesis of impregnants for dispenser cathodes via homogeneous-lyophilization: Phase structure, optical response and emission property of four aluminates" . | CERAMICS INTERNATIONAL 50 . 7 (2024) : 11341-11350 . |
| APA | Cai, Yongfeng , Yang, Yunfei , Liu, Hexiong , Sun, Junhao , Li, Zichen , Zhou, Wenyuan et al. Synthesis of impregnants for dispenser cathodes via homogeneous-lyophilization: Phase structure, optical response and emission property of four aluminates . | CERAMICS INTERNATIONAL , 2024 , 50 (7) , 11341-11350 . |
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摘要 ：
The barium-tungsten cathode is widely used in vacuum electronic devices. To fulfill the application requirements for high current and stability, strontium, belonging to the same main group as barium, is extensively employed as impregnant additive in cathode research. To elucidate the enhancement mechanism of strontium on the performance of barium-tungsten cathode, we calculate the correlation between metal coverage and work function, adsorption energy, and electronic properties. The results demonstrate that the BaxSryO monolayer structures can achieve lower work functions on W(111) and W(211) surfaces with metal coverages of 0.25-0.333 ML and 0.5 ML, respectively. Hence, by adjusting the concentration of strontium, the barium-tungsten cathode can exhibit outstanding electron emission performance. In addition, Sr doping significantly enhanced the adhesion ability of Sr and Ba atoms on the surface, and then improved the evaporation resistance of the active metal atoms. The electron density analysis shows that the Sr and Ba adatoms in low work function structures exhibit electron delocalization, and the electron excitation region is expanded. The calculation of the dipole moment indicates that the weak dipole repulsion between Ba-Sr atoms amplifies the polarization effect of the adsorbent, leading to a reduction in the work function of the Sr-doped surface configuration.
关键词 ：
Thermionic cathodes Thermionic cathodes Strontium Strontium Evaporation Evaporation Dipole moment Dipole moment Work function Work function
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| GB/T 7714 | Liu, Hexiong , Yang, Yunfei , Dong, Liran et al. The mechanism of strontium doping to enhancing the electron emission performance of barium-tungsten cathode [J]. | SURFACES AND INTERFACES , 2024 , 55 . |
| MLA | Liu, Hexiong et al. "The mechanism of strontium doping to enhancing the electron emission performance of barium-tungsten cathode" . | SURFACES AND INTERFACES 55 (2024) . |
| APA | Liu, Hexiong , Yang, Yunfei , Dong, Liran , Li, Zichen , Cai, Yongfeng , Liu, Peng et al. The mechanism of strontium doping to enhancing the electron emission performance of barium-tungsten cathode . | SURFACES AND INTERFACES , 2024 , 55 . |
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摘要 ：
As a solid hazardous waste material, economical and environmental efficacy of spent adsorbent loaded by toxic heavy metals (HMs) are often neglected, which maybe bring serious secondary pollution. In this work, we report a green recycle route for spent HM-bearing calcium silicate hydrate (CSH) adsorbents to construct nanocrystalloaded functional materials. Typically, bimetallic CuNi catalyst (Cu-Ni@deCa-CSH) is obtained by CO2 weathering decalcification of the exhausted CSH adsorbed by Cu2+ and Ni2+, and subsequently reducing at 550 celcius for 6 h under 5 vol% H2/Ar. The universal precursor, HM loaded CSH spent adsorbents, could be ideal for implementing 'CO2 decalcification-H2 reduction' to obtain more metal or metal oxide nanoparticle loaded deCa-CSH samples (Cu-Fe@deCa-CSH, Cu-ZnO@deCa-CSH, Cu-CoO@deCa-CSH, Cu-CeO2@deCa-CSH, etc.), which can dramatically change the surface acidity of substrate owing to the phase transformation from basic CSH to inert silica (deCa-CSH), thus benefitting catalytic reactions. As a case study, the typical 100Cu-100Ni@deCa-CSH (The initial ion concentration is 100 mg/L) exhibits good catalytic activity and stability for p-nitrophenol (p-NP) hydrogenation into p-aminophenol (p-AP) with NaBH4 reducing agent. The conversion efficiency of 99.04% can be achieved within 18 min (initial p-NP: 60 mL, 20 mg/L, Catalyst: 20 mg, NaBH4: 40 mg, pH = 8). Ni addition facilitates electron transfer from Ni to Cu, and the resultant lower electron binding restraint in the heterostructure thus improves the conversion efficiency of p-NP. Important parameters (p-NP initial concentration, NaBH4 addition dosage, solution pH, etc.) are discussed extensively to understand how to prefer reaction conditions for p-NP hydrogenation. The developed surface chemistry strategy thus provides a realistic basis for the formation of functional materials via explore the potential value of solids post-use.
关键词 ：
Adsorbent Adsorbent Recycle Recycle Cu -Ni heterostructure Cu -Ni heterostructure Calcium silicate hydrate Calcium silicate hydrate Catalysis Catalysis
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| GB/T 7714 | Zhou, Fei , Yang, Yunfei , Wu, Junshu et al. Recycle calcium silicate hydrate adsorbent waste for preparing CuNi bimetallic hydrogenation catalyst of p-nitrophenol [J]. | SURFACES AND INTERFACES , 2024 , 46 . |
| MLA | Zhou, Fei et al. "Recycle calcium silicate hydrate adsorbent waste for preparing CuNi bimetallic hydrogenation catalyst of p-nitrophenol" . | SURFACES AND INTERFACES 46 (2024) . |
| APA | Zhou, Fei , Yang, Yunfei , Wu, Junshu , Wang, Jinshu , Xu, Meng , Zhou, Wenyuan et al. Recycle calcium silicate hydrate adsorbent waste for preparing CuNi bimetallic hydrogenation catalyst of p-nitrophenol . | SURFACES AND INTERFACES , 2024 , 46 . |
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摘要 ：
Antibiotics pose significant risks to both the environment and human health. Herein, we develop a collaborative strategy for the enhanced removal of a typical antibiotic, Ciprofloxacin (CIP), by using a bamboo leaf -derived biochar/iron silicate composite (BL-FeSi) with the assistance of peroxymonosulfate (PMS). The rationale behind the design is the construction of composited material with synergistic adsorption -catalysis functions, based on covalent bonding networks of the biochar and specific Fe(III)/Fe(II) redox chemistry of iron silicate in PMS activation system. H 2 reduction of pristine BL-FeSi increases Fe(II) content and thus improves catalytic activity. Batch experiments demonstrate that the preferred BL-FeSi 400 (H 2 treatment at 400 degrees C) exhibits superior efficiency in activating PMS. The CIP removal efficiency is highly dependent on pH value of reaction solution. A remarkable 97% removal is achieved at pH = 5.5 (CIP: 60 mL, 20 mg/L; BL-FeSi 400 : 0.2 g/L, PMS: 0.2 g/L), and the pH increase to 11 results in 100% CIP removal. The BL-FeSi 400 shows robust resistance to inorganic ions (NO 3 - , SO 4 (2 -) , HCO 3 - , and H- 2 PO 4 (-) ), and the catalytic activity remains consistently high ( >82%) even after four consecutive cycles, making it highly promising for practical applications. It is found that both radical pathway (center dot OH and SO 4 center dot - ) and non - radical pathway ( O-1 ( 2) ) contribute to CIP degradation in the BL-FeSi 400 /PMS system, while the active center dot OH dominates the oxidization process. The coupling of adsorption and degradation holds great potentials for effective removal of more organic contaminants.
关键词 ：
Adsorption Adsorption Advanced oxidation Advanced oxidation Biochar Biochar Iron silicate Iron silicate Ciprofloxacin Ciprofloxacin
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| GB/T 7714 | Xu, Meng , Wu, Junshu , Wang, Jinshu et al. Bamboo leaf-derived biochar/iron silicate composite for an adsorption-degradation synergistic removal of ciprofloxacin [J]. | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION , 2024 , 186 : 1183-1196 . |
| MLA | Xu, Meng et al. "Bamboo leaf-derived biochar/iron silicate composite for an adsorption-degradation synergistic removal of ciprofloxacin" . | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION 186 (2024) : 1183-1196 . |
| APA | Xu, Meng , Wu, Junshu , Wang, Jinshu , Zhou, Wenyuan , Li, Yongli , Li, Hongyi . Bamboo leaf-derived biochar/iron silicate composite for an adsorption-degradation synergistic removal of ciprofloxacin . | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION , 2024 , 186 , 1183-1196 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
One of the important issues with the scandate cathode is the mechanism by which Sc works on the cathode surface. A surface Sc-rich dispenser cathode was prepared via the vacuum evaporation method to clarify the role of Sc in the cathode performance. The XPS results indicate that the surface chemical state of Sc on the surface after activation is consists of Sc-0 and Sc epsilon+ (0<epsilon<3). Furthermore, the adsorption energy, the work function, charge density difference, polarization effect and dipole moment of the Ba-x-O-y adsorbed on the Sc surface were calculated by means of first-principles calculations. The results show that the work function of the Bax-Oy dipole adsorbed on the Sc is 1.9-2.8 eV with the average value of 2.262 eV, which is consistent with the experimentally measured result. The work function of Ba-x-O-y adsorbed Sc (002) gets to the lowest at a coverage of 25 %O-25 % Ba. The change of dipole moment due to polarization and charge transfer in the adsorbed layer could affect the work function.
关键词 ：
Scandium film Scandium film Electron emission Electron emission Work function Work function Dispenser cathode Dispenser cathode
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| GB/T 7714 | Sun, Junhao , Yang, Yunfei , Dong, Liran et al. Vacuum evaporation synthesizing Sc film layer and elucidation of near-surface Ba-O-Sc electronic configuration for dispenser cathode [J]. | APPLIED SURFACE SCIENCE , 2024 , 679 . |
| MLA | Sun, Junhao et al. "Vacuum evaporation synthesizing Sc film layer and elucidation of near-surface Ba-O-Sc electronic configuration for dispenser cathode" . | APPLIED SURFACE SCIENCE 679 (2024) . |
| APA | Sun, Junhao , Yang, Yunfei , Dong, Liran , Liu, Zheng , Liu, Peng , Cai, Yongfeng et al. Vacuum evaporation synthesizing Sc film layer and elucidation of near-surface Ba-O-Sc electronic configuration for dispenser cathode . | APPLIED SURFACE SCIENCE , 2024 , 679 . |
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摘要 ：
The inherent brittleness of ceramics, primarily due to restricted atomic motions from rigid ionic or covalent bonded structures, is a persistent challenge. This characteristic hinders dislocation nucleation in ceramics, thereby impeding the enhancement of plasticity through a dislocation-engineering strategy commonly used in metals. Finding a strategy that continuously generates dislocations within ceramics may enhance plasticity. Here, we propose a "borrowing-dislocations" strategy that uses a tailored interfacial structure with well-ordered bonds. Such an approach enables ceramics to have greatly improved tensile ductility by mobilizing a considerable number of dislocations in ceramic borrowed from metal through the interface, thereby overcoming the challenge associated with direct dislocation nucleation within ceramics. This strategy provides a way to enhance tensile ductility in ceramics.
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| GB/T 7714 | Dong, L. R. , Zhang, J. , Li, Y. Z. et al. Borrowed dislocations for ductility in ceramics [J]. | SCIENCE , 2024 , 385 (6707) : 422-427 . |
| MLA | Dong, L. R. et al. "Borrowed dislocations for ductility in ceramics" . | SCIENCE 385 . 6707 (2024) : 422-427 . |
| APA | Dong, L. R. , Zhang, J. , Li, Y. Z. , Gao, Y. X. , Wang, M. , Huang, M. X. et al. Borrowed dislocations for ductility in ceramics . | SCIENCE , 2024 , 385 (6707) , 422-427 . |
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摘要 ：
Dense compact boride layer was developed on the Inconel 718 alloy by powder pack-boriding process. The microstructure and load-dependent wear characteristics of the boride layers were systematically investigated. It is found that the boride layer on Inconel 718 alloy consists of a similar to 2.0 mu m thick nickel-rich top layer, a similar to 11.3 mu m thick compound layer with nanocrystalline (Ni,Fe)(23)B-6 and (Cr,Fe)B grains, and a similar to 10.9 mu m thick diffusion layer with dendritic Cr2B precipitation within the matrix. The phase evolution of the boronizing layer are explainable by thermodynamic modeling of Ni-Cr-B system and the phase stability for metastable Ni-B compounds is confirmed by DFT simulation. The boride layer on Inconel 718 alloy displays good wear resistance against Si3N4 ceramic balls both at room temperature and 500 degree celsius. Specifically, the wear rate at room temperature is in the order of 10(-6) mm(3)N-1 m(-1) and the wear mechanism is combined adhesive/abrasive wear and oxidation wear. A higher loading is found to promote the formation of boron oxide tribolayer on the friction ball surface, which mitigates the wear loss effectively. At elevated temperature, the wear rate is in the order of 10(-4) mm(3)N-1 m(-1) and the wear mechanism is severe abrasion wear and oxidative wear. The employment of higher loads is beneficial to suppressing the formation of nickel oxide debris, which participates the friction process as third body and enhances wear loss.
关键词 ：
Boride layer Boride layer Sliding wear Sliding wear Phase evolution Phase evolution Inconel 718 alloy Inconel 718 alloy
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| GB/T 7714 | Wu, Zhenjiang , Liu, Yue , Shao, Mengxue et al. Insights into the microstructure and load-dependent wear characteristics of the boride layer on Inconel 718 alloy [J]. | TRIBOLOGY INTERNATIONAL , 2024 , 202 . |
| MLA | Wu, Zhenjiang et al. "Insights into the microstructure and load-dependent wear characteristics of the boride layer on Inconel 718 alloy" . | TRIBOLOGY INTERNATIONAL 202 (2024) . |
| APA | Wu, Zhenjiang , Liu, Yue , Shao, Mengxue , Wang, Jinshu , Li, Yangzhong , Peng, Jian et al. Insights into the microstructure and load-dependent wear characteristics of the boride layer on Inconel 718 alloy . | TRIBOLOGY INTERNATIONAL , 2024 , 202 . |
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摘要 ：
Constructing a built-in electric field has emerged as a key strategy for enhancing charge separation and transfer, thereby improving photoelectrochemical performance. Recently, considerable efforts have been devoted to this endeavor. This review systematically summarizes the impact of built-in electric fields on enhancing charge separation and transfer mechanisms, focusing on the modulation of built-in electric fields in terms of depth and orderliness. First, mechanisms and tuning strategies for built-in electric fields are explored. Then, the state-of-the-art works regarding built-in electric fields for modulating charge separation and transfer are summarized and categorized according to surface and interface depth. Finally, current strategies for constructing bulk built-in electric fields in photoelectrodes are explored, and insights into future developments for enhancing charge separation and transfer in high-performance photoelectrochemical applications are provided.
关键词 ：
cation intercalation cation intercalation bulk built-in electric field bulk built-in electric field charge separation and transfer charge separation and transfer photoelectrochemical water splitting photoelectrochemical water splitting
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| GB/T 7714 | Cheng, Houyan , Liu, Peng , Cui, Yuntao et al. Modulating charge separation and transfer for high-performance photoelectrodes via built-in electric field [J]. | INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS , 2024 , 31 (5) : 1126-1146 . |
| MLA | Cheng, Houyan et al. "Modulating charge separation and transfer for high-performance photoelectrodes via built-in electric field" . | INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS 31 . 5 (2024) : 1126-1146 . |
| APA | Cheng, Houyan , Liu, Peng , Cui, Yuntao , Ya, Ru , Hu, Yuxiang , Wang, Jinshu . Modulating charge separation and transfer for high-performance photoelectrodes via built-in electric field . | INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS , 2024 , 31 (5) , 1126-1146 . |
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摘要 ：
用于铝离子电池正极的高熵化合物及其制备方法，涉及铝离子电池领域，用于铝离子电池正极的高熵氧化物和高熵硫化物分子式为MaXb，M选自Fe、Co、Ni、Cu、Mn、Cr、Ti、V、Nb、Mo、Mg、Zn中的至少五种；X为O或S；a : b＝1 : 1、1 : 2、2 : 3、3 : 4或3 : 2。高熵层状氧化物分子式为NaxTMO2(TM : 过渡金属离子)，高熵普鲁士蓝化合物分子式为NaxM[Fe(CN)6]，M选自Fe、Co、Ni、Cu、Mn、Cr、Ti、V、Nb、Mo、Mg、Zn中的至少五种。作为铝离子电池正极材料，可以有效提升铝离子电池的循环稳定性、功率密度、能量密度以及比容量。
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| GB/T 7714 | 胡宇翔 , 刘玉洁 , 王金淑 et al. 用于铝离子电池正极的高熵化合物及其制备方法 : CN202310216285.1[P]. | 2023-03-07 . |
| MLA | 胡宇翔 et al. "用于铝离子电池正极的高熵化合物及其制备方法" : CN202310216285.1. | 2023-03-07 . |
| APA | 胡宇翔 , 刘玉洁 , 王金淑 , 杜楷 , 谢明明 , 赵益祺 . 用于铝离子电池正极的高熵化合物及其制备方法 : CN202310216285.1. | 2023-03-07 . |
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