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
Food Bioscience
·
2025
·
IF 5.9
Jie Luo,Zhuhui Tian,Wenying Yuan,Xiaopeng Peng,Hui Zhou,Qingwu Shen,Yang Luo,Yuxing Guo,Zihang Shi,Xiaoxiao Jiang,Bo Chen,Daodong Pan,Xiankang Fan
Aging and Se deficiency can lead to numerous health problems in the organism, so there is a need to develop new technologies for anti-aging and daily selenium supplementation. In this study, efficient selenium-enriched lactic acid bacteria were screened and selenium-enriched yogurt was developed, and its effect on D-galactose-induced senescence in mice was further investigated. The results showed that Limosilactobacillus fermentum CGMCC 17434 could be efficiently enriched in selenium, and its organic selenium conversion rate was 88.12 %. Secondly, the content of organic selenium and resveratrol in peanut germination was 3.48 ± 0.16 μg/g d.w. and 20.36 ± 0.78 μg/g d.w., respectively, under the Na 2 SeO 3 concentration of 12 mg/L, soaking time of 10 h, soaking temperature of 30 °C, and germination temperature of 28 °C. The selenium-enriched yogurt developed on this basis contained 172.10 ± 0.56 μg/L of organic selenium and delayed the aging of D-galactose-induced senescence model mice. This might be due to the selenium-enriched Limosilactobacillus fermentum CGMCC 17434 and organic selenium in yogurt increased glutathione levels and superoxide dismutase activity, and decreased malondialdehyde, protein carbonyls and reactive oxygen species levels, as well as decreasing the release of oxidative stress-generated inflammatory factors such as IL-1β, IL-6 and TNF-α.
研究领域:
生物技术
·
营养学
·
抗衰老研究
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2021
·Vol. 27
·期 8
·3327-3337
·
IF 2.817
Xiao Dejun,Liu Suqin,Zhao Kuangmin,Ye Guanying,Su Yuke,Zhu Weiwei,He Zhen
Ultrasmall nitrogen-doped carbon-coated CoSe 2 /ZnSe nanospheres (CoSe 2 /ZnSe@C nanospheres) are fabricated by direct selenization of a delicately designed Co 1.6 Zn 0.4 -(benzimidazole) 4 metal–organic framework (MOF) nanosheet precursor and used as the anode materials in sodium-ion batteries (SIBs). The fabricated CoSe 2 /ZnSe@C nanospheres deliver a remarkable rate performance (395 mAh g −1 at 0.1 A g −1 and 341 mAh g −1 at 5.0 A g −1 ) and excellent long-term durability (346 mAh g −1 after 2500 cycle at 2.0 A g −1 ). The superior Na storage performance of the fabricated CoSe 2 /ZnSe@C nanospheres could be mainly attributed to their ultrasmall particle sizes and the phase boundaries between CoSe 2 and ZnSe, which improve the kinetics of the electrode, relieve the volume change during the charge/discharge process, and provide extra Na + storage sites. This work opens up possibilities to fabricate metal selenide–based hybrid materials with desired nanostructures and compositions from rationally designed multimetal MOF precursors for high-performance anode materials in SIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xinzhi Wang,Jing Jiang,Jiayi Zhang,Qiyao Zeng,Aike Liu,Lunhong Ai
Defect engineering is considered one of the most powerful strategies for regulating the catalytic activity of electrocatalysts. A deep understanding of the defect-involved mechanism in electrocatalytic process is of great importance but remains a challenging task. In this study, an anionic Se-vacancy (V Se ) was introduced into iron diselenide (FeSe 2 ) nanoarrays, enabling the catalyst to exhibit improved electrocatalytic performance for sulfion oxidation reaction (SOR). The Se vacancy incorporated can modulate surface electronic structure and optimize the proximity of the d-p band center, strengthening the interaction between FeSe 2 -V Se and S atom. This endows the FeSe 2 /IF-V Se catalyst with the excellent electrocatalytic activity for SOR. As an alternative reaction to oxygen evolution reaction (OER), the low-potential SOR enables an ultralow electricity consumption in SOR-hydrid seawater electrolysis, avoiding detrimental chlorine electrochemistry. A proof-of-concept self-powered system based on FeSe 2 -V Se electrodes was constructed by integrating Zn-nitrite battery and SOR-hybrid seawater electrolyzer to produce high-value hydrogen, sulfur and ammonia. This work offers a fascinating strategy for the construction of an advanced energy system to produce hydrogen while utilizing seawater and wastewater.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Bin Xu,Chuanhe Ma,Xiaoshuang Lu,Yulin Liu,Qiao Zhang,Ye Chen,Pingxiong Yang,Junhao Chu,Lin Sun
Cu 2 ZnSn(S,Se) 4 (CZTSSe) has received considerable attention as the promising absorber for thin-film solar cells. For traditional selenization process, the issues of Sn-loss, lower S/(S + Se) ratio, and unsuitable back contact interface extensively exist in CZTSSe solar cells. In present work, SnSe and SnS powder is introduced during selenization process, respectively. The effects of SnSe and SnS powder on CZTSSe films and the Mo/CZTSSe interface have been comprehensively studied. We discover that SnS not only can provide the Sn-contained vapor in selenization process but also offer S-vapor. Due to the presence of Sn-contained vapor, the number of voids in the CZTSSe absorber and Mo/CZTSSe interface decreases remarkably and the Sn-loss is effectively suppressed. The thickness of Mo(S,Se) 2 layer is significantly reduced, and the S/(S + Se) ratio in CZTSSe bulk obviously increases owing to the presence of S-vapor. As a consequence, the open-circuit voltage and fill factor of the solar cell significantly increase and the CZTSSe solar cell with efficiency of 10.07% (total area) is successfully fabricated.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xu-Wei Luo,Ming-Ran Zhou,Mao-Jin Ran,Dao-Xiang Xun,Jia-Le He,Zhi-Yi Hu,Hemdan S.H. Mohamed,Jing Liu,Li-Hua Chen,Yu Li,Bao-Lian Su
Lithium-selenium (Li-Se) batteries have attracted increasing attention because of excellent carbonate electrolyte compatibility, comparable theoretical volumetric specific capacity and high electrical conductivity. However, there are still unavoidable issues such as large volume expansion, rapid capacity decay and slow electrochemical reaction kinetics for practical applications. In this work, we report 2D ZIF-8 derived N-doped porous carbon nanosheets (NPC-NS) as Se host for high-performance Li-Se batteries. The unique 2D structure of Se@NPC-NS facilitates Li + diffusion and charge transfer, thus the Se@NPC-NS cathode exhibits fast electrochemical reaction kinetics. In addition, the N doping enhances electronic conductivity and porous structure mitigates the volume expansion. As a result, the Se@NPC-NS cathode delivers a high reversible capacity of 585 mAh/g with a capacity retention of 99.1 % at 0.5C (1C = 675 mA g −1 ) after 225 cycles. Especially after 500 cycles at a high current density of 10C, the Se@NPC-NS cathode still displays a reversible specific capacity of 307 mAh/g with only 0.03 % capacity decay per cycle. This work would shed some light on the 2D carbon host as Se-based cathode for high-rate and long-life performance Li-Se batteries.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
TETRAHEDRON
·
2018
·
IF 2.377
Jie Zhu,Wenhui Zhu,Ping Xie,Charles U. Pittman,Aihua Zhou
A novel and efficient Ni-catalyzed aryl- and alkyl-selenation of imidazo[1,2-α]pyridines employing selenium powder has been developed for the first time. The significant advantages of this protocol are that it is an inexpensive nickel catalyst and exhibits broad functional-group compatibility and good reaction yields.
研究领域:
有机化学
·
催化化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Zewen Yang,Kunjie Zhu,Zihao Dong,Dandan Jia,Lifang Jiao
Lithium–selenium (Li–Se) batteries have recently attracted more and more attentions as new secondary battery systems due to the similarity but better performances than lithium–sulfur (Li–S) batteries. However, the dissolution of selenium in electrolytes results in low selenium utilization, concentration polarization, inferior capacities, and unstable cycling performances. Herein, 46.58 wt% of selenium is loaded on carbon cloths through the calcination process, which were directly used as self-supporting cathodes. Carbonized polyacrylonitrile (PAN) nanofiber membranes produced by electrospinning are worn as the protective clothing between the cathode and separator to avoid the loss and dissolution of selenium. The stabilization of Li–Se batteries was enhanced by introducing two interlayers, as expected, they exhibit a stable reversible average capacity of 590 mA h g–1 during 1000 cycles at a current density of 0.5 C (1 C = 675 mA g–1). No polyselenide formation is found during charging/discharging, and the effects of the introduced PAN interlayers on improving the stability and reducing the polarization of the assembled Li–Se batteries are confirmed by mechanistic characterizations. These regulated Li–Se batteries present great application potential in the future, and the design idea can also be promoted to explore other energy storage systems.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Lingxin Kong,Hui Luo,Sihai Lv,Yongzhi Cheng,Qifan Li,Fu Chen,Xiangcheng Li
With the increase in electromagnetic wave pollution, the development of high-performance microwave absorbers has become a critical research focus. Multi-interface dielectric loss microwave absorbers have emerged as a promising strategy to address electromagnetic pollution. In this study, multi-interface carbon-based selenide composites were synthesized via solvothermal treatment and pyrolytic selenization. The thermal treatment temperature significantly influences the crystal phase, defects, and the electromagnetic properties. The results demonstrate that the carbon-based selenide composite exhibits excellent microwave absorption. The maximum reflection loss reaches −52.37 dB at a thickness of 2.9 mm, while the effective absorption bandwidth is 4.43 GHz at a thickness of 1.75 mm. The designed periodic unit cell metamaterial structure, based on MMSC composites, achieves an effective absorption bandwidth of 11 GHz at a thickness of 6.0 mm. This study proposes a novel strategy for synthesizing multi-interface carbon-based bimetallic selenide composites as high-performance microwave absorbers.
研究领域:
材料科学
·
电磁学
·
纳米技术
·
复合材料
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Xiaohong Xia,Xuan Shen,Yonglin Du,Weichun Ye,Chunming Wang
Cellular glutathione plays critical roles in protecting neuronal cells against dopamine induced oxidative stress and electrophilic cellular damage; inspired by above mentioned properties of glutathione, we used glutathione as a polymerization inhibitor to develop a dopamine biosensor which can be used in alkaline environment. The detection of dopamine in alkaline environment has been challenged by its polymerization for many years, glutathione as a kind of thiol can be used to prevent the polymerization of dopamine in alkaline environment by eliminating the electrophilic quinone molecules needed during the polymerization. In order to enhance the electrochemical performance of electrode, Ag 2 Se/MoSe 2 composite with large exposed surface areas was synthesized, which improved the sensitivity and stability for dopamine detection. The low oxidation peak potential for dopamine, 0.04 V vs. SCE, indicats that glutathione can realize the electrooxidation of dopamine at lower potential in alkaline environment. In this study, by introducing glutathione to inhibit the dopamine polymerization, sensitive and stable detection of dopamine can be achieved at pH 8.5 based on the Ag 2 Se/MoSe 2 /GCE.
研究领域:
分析化学
·
神经科学
·
电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Fang Xie,Xiaoqing Liu,Nian Liu,Xiaofang Feng,Zhijun He,Zia-ud Din,Shuiyuan Cheng,Yangchao Luo,Jie Cai
To develop a promising selenium supplement that overcomes the instability and poor water dispersibility of selenium nanoparticles (SeNPs), we synthesized a series of amphiphilic octenyl succinic anhydride starch (OSAS) through esterification. As the degree of substitution ( DS ) increased, the particle size of OSAS micelles and the critical micelle concentration (CMC) decreased. FTIR and XRD analysis confirmed the successful introduction of octenyl succinic anhydride groups onto starch. Subsequently, OSAS micelles were used as carriers to synthesize SeNPs via in situ chemical reduction, forming SeNPs-loaded self-assembled starch nano-micelles (OSAS-SeNPs). The OSAS-SeNPs exhibited spherical dispersion in water with an average diameter of 116.1 ± 2.3 nm, contributed to enhanced hydrophobic interactions. TEM images showed a core-shell structure with SeNPs as the core and OSAS as the shell. FTIR results indicated hydrogen bonding interactions between OSAS and SeNPs. Due to the negatively charged OSAS shell and hydrogen bonding (O H⋯Se), OSAS-SeNPs remained non-aggregated for one month at room temperature, demonstrating remarkable stability. This study suggests that using OSAS can address the synthesis and stability issues of SeNPs, making it a potential selenium supplement candidate for further evaluation as an anticancer agent.
研究领域:
食品科学
·
纳米医学
·
材料化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 21
·7507
·
IF 4.927
Yu Yuan,Panpan Cui,Jie Liu,Wei Ding,Yong Wang,Liping Lv
Transition metal-based compounds with high theoretical capacitance and low cost represent one class of promising electrode materials for high-performance supercapacitors. However, their low intrinsic electrical conductivity impedes their capacitive effect and further limits their practical application. Rational regulation of their composition and structure is, therefore, necessary to achieve a high electrode performance. Herein, a well-designed carbon-encased mixed-metal selenide rooted with carbon nanotubes (Ni-Co-Se@C-CNT) was derived from nickel–cobalt bimetallic organic frameworks. Due to the unique porous structure, the synergistic effect of bimetal selenides and the in situ growth of carbon nanotubes, the composite exhibits good electrical conductivity, high structural stability and abundant redox active sites. Benefitting from these merits, the Ni-Co-Se@C-CNT exhibited a high specific capacity of 554.1 C g−1(1108.2 F g−1) at 1 A g−1and a superior cycling performance, i.e., 96.4% of the initial capacity was retained after 5000 cycles at 10 A g−1. Furthermore, a hybrid supercapacitor assembled with Ni-Co-Se@C-CNT cathode and activated carbon (AC) anode shows a superior energy density of 38.2 Wh kg−1at 1602.1 W kg−1.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）