International Journal of Minerals Metallurgy and Materials
·
2024
·Vol. 31
·期 5
·899-906
·
IF 5.6
Lei Haiping,Wei Tianwei,Tu Jiguo,Jiao Shuqiang
Incorporating a selenium (Se) positive electrode into aluminum (Al)-ion batteries is an effective strategy for improving the overall battery performance. However, the cycling stability of Se positive electrodes has challenges due to the dissolution of intermediate reaction products. In this work, we aim to harness the advantages of Se while reducing its limitations by preparing a core–shell mesoporous carbon hollow sphere with a titanium nitride (C@TiN) host to load 63.9wt% Se as the positive electrode material for Al–Se batteries. Using the physical and chemical confinement offered by the hollow mesoporous carbon and TiN, the obtained core–shell mesoporous carbon hollow spheres coated with Se (Se@C@TiN) display superior utilization of the active material and remarkable cycling stability. As a result, Al–Se batteries equipped with the as-prepared Se@C@TiN composite positive electrodes show an initial discharge specific capacity of 377 mAh·g −1 at a current density of 1000 mA·g −1 while maintaining a discharge specific capacity of 86.0 mAh·g −1 over 200 cycles. This improved cycling performance is ascribed to the high electrical conductivity of the core–shell mesoporous carbon hollow spheres and the unique three-dimensional hierarchical architecture of Se@C@TiN.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2022
·Vol. 14
·期 39
·14585-14593
·
IF 8.307
Zhiyong He,Yuexu Xiong,Wenlin Feng
Rhenium (Re)-based transition metal dichalcogenides (TMDs) have excellent in-plane anisotropic optical and electrical properties. However, their distorted octahedral (1T′) structure and weak interlayer coupling easily lead to anisotropic and out-of-plane growth, which makes it particularly difficult to prepare large-area Re-based TMD continuous porous films on SiO2/Si substrates. In this work, ReS2 films are synthesized on SiO2/Si substrates by using tellurium (Te) powder-assisted chemical vapor deposition, and then the films are selenized to synthesize a series of continuous large-area ReS2(1−x)Se2x (x = 0, 0.34, 0.56, 0.84, and 0.91) nanosheet-formed porous films. Furthermore, prototype ReS2(1−x)Se2x photodetectors with different Se compositions are fabricated. The surface morphology, high quality crystallization and compositions are confirmed by various characterization techniques. The ReS2(1−x)Se2x photodetectors based on these films show excellent ultraviolet-visible (UV-vis) spectral responses and self-powered characteristics. The response time is faster, and the photocurrent increases with the Se composition. Due to the Schottky barrier generated by the Ag–ReS2(1−x)Se2x interface, the device without bias voltage has a superior responsivity (121.9 mA W−1), high detectivity (5.27 × 1012 Jones), good on/off ratio (1.2 × 103) and fast response time (rising/decay times, 30/60 ms) under 365 nm light irradiation. This simple and controllable method opens up a new way to produce high-quality vertically oriented ReS2(1−x)Se2x porous arrays on SiO2/Si substrates for next-generation application in UV-vis photodetectors.
研究领域:
材料科学
·
光电检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Analytical Methods
·
2016
·Vol. 10
·期 6
·1653-1660
·
IF 2.167
Wang Xiaojun,Chen Peng,Cao Liang,Xu Guoliang,Yang Siyu,Fang Ye,Wang Guozhen,Hong Xincheng
A novel and sensitive magnetic ionic liquid-based up-and-down-shaker-assisted dispersive liquid-liquid microextraction (MIL-UDSA-DLLME) was developed for the graphite furnace atomic absorption spectrometric measurement of inorganic selenium speciation from various rice matrixes. In the first microextraction step, the magnetic ionic liquid (1-butyl-3-methylimidazolium tetrachloroferrate, [C 4 mim][FeCl 4 ]) was selected to extract the complex of Se(IV) and 2,3-diaminonaphthalene from aqueous solution by the assistance of up-and-down-shaker vortex agitator. After the microextraction step, the magnetic ionic liquid containing target analytes was collected at the bottom of the tube by applying an external magnetic field around the test tube. Under the optimized conditions, the method present has low detection limit (0.018 μg L −1 ), wide linear dynamic range (0.03–10 μg L −1 ), and good repeatability (<3.0%, n = 10) for Se(IV). The proposed methodology was applied for separation and preconcentration of inorganic selenium in standard reference materials including GBW10010 rice, GBW10043 Liaoning rice, and GBW10045 Hunan rice with satisfactory results. The developed methodology was also successfully used for the speciation of Se(IV) and Se(VI) in different rice samples with the relative recoveries within the acceptable range of 94.9–104.8% for the addition recovery tests.
研究领域:
分析化学
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环境科学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Xinyang Liu,Meng Zhang,Xingzheng Peng,Mengke Li,Xuewu Gao,Yi Feng,Shengli Chen,Xiongwei Qu,Xiaojie Zhang
Although the proportion of binder in batteries is tiny, it plays a significant role in maintaining the integrity of the electrode structure and ensuring the cycling stability of batteries. This study, based on the concept of “redox mediators (RMs),” involved the design and synthesis of a series of Se–Se bonds containing polyurethanes, which have been used as binders for lithium iron phosphate cathodes in lithium-ion batteries (LIBs). Se–Se contained binders as RMs not only accelerate the redox kinetics of the battery but also improve the discharge specific capacity and lithium-ion (Li+) transport rate of the battery. The synergistic movement of the hard and soft segments in the polyurethane endowed the binders with high elasticity, and the hydrogen bonding within the binders further enhanced the mechanical properties and reduced the volume change of the electrode during charging and discharging, thus improving the electrochemical cycling performance of the battery. After 500 cycles at 1 C, LIBs with PUPEG-400 as the binders boasted the highest initial discharge specific capacity of 139.77 mA h g–1, while those with PUPEG-2000 as the binders exhibited the highest capacity retention of 72.37%.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Min Sun,Guowu Tang,Wangwang Liu,Guoquan Qian,Kaimin Huang,Dongdan Chen,Qi Qian,Zhongmin Yang
Tin selenide (SnSe) exhibits high thermoelectric (TE) performance, which is a promising TE candidate for thermal-electrical energy conversion. In this work, Sn-Se alloy core borosilicate glass-clad fibers with ∼94 μm core and ∼220 μm cladding in diameter were fabricated by a molten core drawing method. X-ray diffraction (XRD) showed the core to be highly crystalline and consist of SnSe and SnSe 2 poly-crystal grains. Based on EPMA measurement, there exists an inter-diffusion process between the core and cladding ions during the fiber drawing. The Seebeck coefficient of the Sn-Se core is −151 μV/K. The electrical conductivity of the Sn-Se core is as high as 6.2 × 10 3 S/m, which is close to that of SnSe single crystals. The demonstration of fibers with TE core materials and the integration with the conventional fiber fabrication technique represents the first step in providing the building blocks for fiber-integrated TE devices.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2018
·
IF 13.12
Xiaosen Zhao,Lichang Yin,Tong Zhang,Min Zhang,Zhibo Fang,Chunzhong Wang,Yingjin Wei,Gang Chen,Dong Zhang,Zhenhua Sun,Feng Li
Selenium (Se) is a prospective candidate of cathode material for high-energy batteries . However, the dissolution of high-order lithium selenides and the shuttle effect in electrolytes lead to low Se utilization, inferior capacity and poor cycling performance. Herein, a heteroatoms (N and O) dual-doped hierarchical porous carbon (HDHPC) with interconnected macro/meso/micropores is used to confine Se composite and developed as a cathode material for advanced Li/Na–Se batteries in low-cost carbonate electrolyte. For Li-Se batteries, Se/HDHPC cathode delivers an initial charge capacity of 613 mAh g −1 and maintains stable reversible capacity of 545 mAh g −1 with a capacity decay as low as 0.0074% per cycle after 1500 cycles at a current density of 0.5 C (1 C = 675 mA g −1 ). For Na-Se batteries, Se/HDHPC exhibits a high initial charge capacity of 619 mAh g −1 and retains as high as 402 mAh g −1 after 500 cycles at a current rate of 0.5 C. Moreover, Se/HDHPC composite also exhibits an excellent rate performance both in the Li-Se and Na-Se batteries even at a high rate up to 20 C (13.5 A g −1 ). Such excellent electrochemical properties of Se/HDHPC are mainly contributed from two aspects. One is the hierarchical porous structure of the HDHPC, which benefit the penetration of electrolyte and also act as micro reaction chambers to effectively suppress the volume change of the electrode. The other is the strong interaction between lithium/sodium selenide and carbon host induced by heteroatoms (N and O) dual-doping, which can strongly anchor the Se-contained species, thus preventing the side reaction of Se anions with electrolyte.
研究领域:
储能
·
电化学
·
材料科学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Luyao Qi,Shengfan Fang,Huipei Zhang,Mengyuan Guo,Yanmin Qin,Liping Guo
Molybdenum disulfide (MoS 2 ) is considered a promising candidate for anodes in lithium-ion batteries (LIBs), however, its practical application is hindered by inferior cyclic stability and poor capability. Given the analogous coordination environments of selenium and sulfur within the same main group, selenium doping (Se) is explored to augment interlayer spacing and conductivity, thereby accelerating diffusion kinetics and enhancing capacitance contribution. In this study, we fabricate composites of Se-doped bulk MoS 2 (B-MoS 2 -Se) through a combination of heat treatment and subsequent selenization process. Se doping not only enhances interlayer spacing but also forms a binary alloy , MoS 2−x Se x . The expanded interlayer spacing mitigates resistance to Li + diffusion, improving the kinetics of Li + reactions, while the binary alloy MoS 2−x Se x concurrently enhances the conductivity of bulk MoS 2 . By intricately integrating these advantages, the B-MoS 2 -Se-1 electrode demonstrates exceptional long-term cycling performance (390 mA h g −1 at 1.0 A g −1 after 2000 cycles) and remarkable rate capability (172.4 mA h g −1 at 5.0 A g −1 ), showcasing its significant potential for practical applications in LIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·Vol. 13
·期 9
·2402434
·
IF 8
Xinrui Ma,Kaiyi Wang,Chen Fan,Xuanbang Li,Yulong Hao,Jie Zhou,Xuemei Lu,Ting Shu,Lili Miao,Jin Li,Guolin Hao
Selenium (Se), as a typical elemental semiconductor, has garnered significant attention due to its excellent carrier mobility, outstanding photoconductivity, and broad spectral response. However, Se micro- and nanostructures exhibit inherently low nonlinear optical coefficients, necessitating substantial enhancement of their nonlinear optical properties. In this study, trigonal Se (t-Se) microwires (MWs) and t-Se/MoS 2 mixed-dimensional vertical heterostructures are synthesized using the atmospheric pressure vapor phase deposition method. the influence of precursor concentration on the growth of t-Se MWs is systematically investigated, and computational fluid dynamics simulations are employed to elucidate the growth mechanism. Open-aperture Z-scan measurements reveal that the nonlinear optical properties of t-Se/MoS 2 mixed-dimensional vertical heterostructures are significantly enhanced compared to those of t-Se MWs and monolayer MoS 2 nanosheets. First-principles calculations based on density functional theory, along with surface potential measurements indicate that effective charge transfer across the interfaces of the vertical heterostructures is critical for enhancing their nonlinear optical properties. This study provides valuable insights into the development of next-generation nonlinear optical materials and advanced devices.
研究领域:
材料科学
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纳米技术
·
光学与光子学
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半导体物理
·
凝聚态物理
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Dong Gao,Xiao Ji,Hongwei Yu,Zhanggui Hu,Jiyang Wang,Yicheng Wu,Hongping Wu
Four new metal chalcogenides containing fluorine, Na 2 Ba 17 In 8 Q 21 F 18 (Q = S, Se), KBa 2 InQ 3 F 2 (Q = S, Se) were synthesized by the solid-state reactions, and their structures were determined by single crystal X-ray diffraction. To the best of our knowledge, they represent the first example of F-containing mixed alkali and alkaline earth In-based chalcogenides . Structurally, Na 2 Ba 17 In 8 Q 21 F 18 (Q = S, Se), KBa 2 InQ 3 F 2 (Q = S, Se) all feature one-dimensional chain-like structures composed of In-based polyhedra, but they are not isostructural. The optical property measurements indicate that KBa 2 InSe 3 F 2 and Na 2 Ba 17 In 8 Se 21 F 18 have relatively large birefringences (0.096 and 0.083 at 532 nm, respectively), which are larger than that of KBa 2 InS 3 F 2 (0.056 @ 532 nm) and Na 2 Ba 17 In 8 S 21 F 18 (0.041 @ 532 nm). Their structure-property relationship demonstrates that the large difference of birefringence among these compounds mainly arises from the different connection modes of InQ n (n = 4, 5) polyhedra. In addition, the first-principles calculations, UV–vis–NIR diffuse reflectance spectra and IR spectroscopy of title compounds have also been performed. The effect of M III /cation ratios on the polymerization of In–Q (Q=S, Se) units have been discussed.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2018
·Vol. 2018
·期 39
·4375-4384
·
IF 2.507
Na An,Huiming Lin,Fengyu Qu
Graphical GNRs@mSiO 2 core–shell nanoparticles have been synthesized as host to load ICG and DOX molecules by the layer-by-layer assembly method through electrostatic interactions. A sensitive Se–Se linker was synthesized and grafted to ensure controlled release. Under NIR irradiation, the enhanced cytotoxicity to cancer cells is derived from the synergistic effect of chemotherapy, PTT, and PDT. A novel GNRs@mSiO 2 core–shell nanocomposite has been synthesized to integrate sensitive chemotherapy with photodynamic therapy (PDT) and photothermal therapy (PTT) for enhanced antitumor treatment by using gold nanorods (GNRs) as the core and mesoporous silica (mSiO 2 ) as the shell. After modifying with -NH 2 , Indocyanine Green (ICG, negative charge) and doxorubicin hydrochloride (DOX, positive charge) molecules could be stored in the mesopores by the layer-by-layer assembly method through electrostatic interactions. To inhibit leakage from the mesopores, a sensitive Se–Se linker was synthesized and adopted as a nanovalve coated on the outside of the nanoparticles (GNRs@mSiO 2 -ICG-DOX@Se-Se). Under NIR (808 nm) irradiation, heat elevation (derived from GNR/ICG) and generation of reactive oxygen species (ROS, derived from ICG) can also be detected in vitro. Owing to the redox sensitivity of Se–Se, GNRs@mSiO 2 -ICG-DOX@Se-Se showed reduction (GSH)- as well as oxidation (ROS)-triggered DOX release. To further ensure specific targeting, folic acid (FA) was grafted to the outside of the nanoparticles, because of the high expression of FA receptors on tumor cells. Detailed cell experiments performed with the nanoparticles and HepG2 as typical cancer cells showed enhanced cytotoxicity towards the cancer cells owing to the synergistic effect of chemotherapy, PTT, and PDT. On account of the different GSH concentrations in cancer and normal cells and the switch-on/off application of NIR irradiation, the GNRs@mSiO 2 -ICG-DOX@Se-Se-FA nanoparticles show potential for applications in cancer therapy.
研究领域:
纳米医学
·
肿瘤学
·
生物材料学
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science-Nano
·
2018
·Vol. 5
·期 6
·1441-1453
·
IF 6.087
Jingmiao Wei,Wei Zhang,Weiyi Pan,Chaoran Li,Weiling Sun
Adsorption behaviors and mechanisms of selenite [Se(IV)] and selenate [Se(VI)] on two types of zirconium metal–organic frameworks (MOFs, UiO-66 and UiO-66-NH2) were investigated using batch experiments, spectroscopic analyses, and theoretical calculations. Se(IV) adsorption was substantially greater than Se(VI) adsorption. Intriguingly, with increasing solution pH, Se(IV) adsorption increased to a maximum at pH 7, whereas Se(VI) adsorption monotonically decreased. Se(IV) adsorption was not influenced by coexisting ions except for PO43−, whereas Se(VI) adsorption was in general decreased with increasing coexisting ion concentrations. The underlying molecular binding mechanisms were elucidated via zeta potential, XPS, and FTIR analyses as well as density functional theory calculations. Se(IV) formed a strong inner-sphere complex with the MOFs via Lewis acid/base complexation between the Zr coordinatively unsaturated sites and HSeO3− or SeO32− (−59.4 to −142 kJ mol−1) and hydrogen bonding between Zr–O–C and H2SeO3 (−24.4 to −29.8 kJ mol−1). Se(VI) formed outer-sphere complexes with the MOFs through electrostatic interactions (−50.6 to −62.1 kJ mol−1). Thus, the BET surface area was the predominant factor determining the Se(IV) adsorption, whereas both the surface charge and BET surface area controlled the Se(VI) adsorption. This study provided new insights on the molecular interactions between Se(IV) and the MOFs, and revealed the distinct differences between the Se(IV) and Se(VI) adsorptions.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
DOI
高影响因子
PROCESS BIOCHEMISTRY
·
2023
·
IF 4.4
Xiaoxue Zhang,Mengmeng Zhong,Rui Zhou,Wenxiu Qin,Youbin Si
Microbial reduction of Se(IV) to Se(0) is extremely important for the detoxification of selenium oxyanion, but the reductive mechanism is still controversial. In this study, the reduction of Se(IV) by Shewanella oneidensis MR-1 and Shewanella putrefaciens was systematically investigated. The results showed that excessive Se(IV) severely inhibited the growth of microorganisms and Se(IV) reduction. The extracellular accumulation of Nano-Se(0) particles was shown to be approximately 250–650 nm in diameter. Riboflavin facilitated Se(IV) reduction, while rotenone , as an electron inhibitor, could completely inhibit Se(IV) reduction, validating the extracellular electron transport process for biosynthesized Nano-Se(0). Importantly, the amorphous Nano-Se(0) synthesized by S. oneidensis MR-1 were mixtures of helical chains and Se 8 rings, while those synthesized by S. putrefaciens were mainly composed of helical chains. FTIR results demonstrated that Nano-Se(0) particles were wrapped by some proteins, organic substances and lipids , exhibiting superior dispersibility and biocompatibility. Biogenic Nano-Se(0) particles can also be considered for technological applications in various fields.
研究领域:
微生物学
·
环境科学
✓ 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）