SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Jiuli Han,Lu Bai,Shuangjiang Luo,Bingbing Yang,Yinge Bai,Shaojuan Zeng,Xiangping Zhang
Ionic liquids (ILs) are attractive and prospective materials used in membranes due to the nonvolatility, structure tunability, and the ability to tune the interface compatibility. The cobalt IL Bmim 2 Co(NCS) 4 possesses the porphyrin-like N4-coordinated cobalt center which could selectively and reversibly interact with O 2 . Herein the Bmim 2 Co(NCS) 4 as liquid-phase oxygen carrier was used to fabricate thin-film composite (TFC) membrane with the polymer of intrinsic microporosity (PIM-1). The microstructures, properties and gas separation performance of the membrane were compared with the TFC membrane which takes cobalt porphyrin (T(4-Cl)PPCo) as a carrier. We found that the addition of a small amount of T(4-Cl)PPCo can enlarge the d -spacing of packed chains of PIM-1 and significantly increase the fractional free volume (FFV) and the gas permeability of the membrane, but the selectivity is unsatisfactory. It is worth noting that adding Bmim 2 Co(NCS) 4 into the polymer can increase greatly the O 2 /N 2 selectivity which is higher than that of the membrane with T(4-Cl)PPCo. Although the addition of Bmim 2 Co(NCS) 4 decreases the d -spacing of packed chains of PIM-1, resulting in the slight decline of FFV and gas permeability of the membrane, the Bmim 2 Co(NCS) 4 /PIM-1 TFC membranes exhibit better O 2 /N 2 separation performance than the T(4-Cl)PPCo/PIM-1 TFC membranes in consideration of the Robeson upper bound.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
ChemSusChem
·
2017
·Vol. 10
·期 13
·2714-2719
·
IF 7.226
Ziqiang Liu,Ningning Feng,Zihan Shen,Fujun Li,Ping He,Huigang Zhang,Haoshen Zhou
A new carbon- and binder-free O 2 cathode was fabricated by electroplating Ru-nanoparticle-coated ultralight Ni foam, which has good electron-conducting and electrocatalytic properties. This all-metal monolithic structure was able to suppress CO 2 evolution and provided 306 times higher capacity than commercial Ni foam-based O 2 cathodes. Graphical That′s so metal : A new carbon- and binder-free O 2 cathode is fabricated by electroplating Ru-nanoparticle-coated ultralight Ni foam, which has good electron-conducting and electrocatalytic properties. This all-metal monolithic structure suppresses CO 2 evolution and provides 306 times higher capacity than commercial Ni foam-based O 2 cathodes.
研究领域:
电化学
·
储能
·
材料科学
·
纳米催化
·
电池技术
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DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Tang Linbin,Lu Zechun,Gao Zongyan,Lou Xuechun,Li Junjian,Wen Yujie,Chen Junchao,Zhu Zhexuan,Luo Shijing,Zhou Lina,Wei Guangfeng,Chen Zuofeng,Zhao Hongying,Li Tong,Peng Luming,Li Fengting,Liu Tao
Achieving a reversible four-electron-per-oxygen-molecule oxygen evolution reaction is an essential yet highly challenging task for nonaqueous lithium hydroxide-based Li | |O 2 batteries, as the kinetically sluggish oxygen evolution reaction tends to entangle with competing parasitic reactions, whose origins and mitigating strategies remain largely elusive. Here we construct a highly reversible lithium hydroxide-based Li | |O 2 battery using iron–cobalt–nickel layered double hydroxide catalysts and tetramethylene sulfone-based electrolytes. Lithium hydroxide decomposition toward oxygen evolution involves key reactive oxygen species of surface-bound hydroxyl and hydroxyl radicals, but no singlet oxygen. These hydroxyl species corrode the electrolyte and carbon support, predominantly accounting for charging irreversibility. While oxidation-resistant solvents and electrical conductors are necessary to reduce hydroxyl-induced side reactions, the synergistic interplay of interfacial water solvation and catalytic surface structures hold the key to steering hydroxyl activity toward the desirable oxygen evolution reaction or by-product formation. This work offers insights into achieving long-life lithium hydroxide-based Li | |O 2 batteries.
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DOI
PubMed
高影响因子
Advanced Energy Materials
·
2020
·Vol. 10
·期 38
·2001592
·
IF 25.245
Xiaodong Lin,Zongqiang Sun,Chun Tang,Yuhao Hong,Pan Xu,Xueyang Cui,Ruming Yuan,Zhiyou Zhou,Mingsen Zheng,Quanfeng Dong
The reduction of O 2 to solid Li 2 O 2 on discharge and the reverse oxidation of Li 2 O 2 to O 2 on recharge are the essential processes to determine the performance of Li-O 2 batteries. The discovery of effective catalysts with a favorable Li 2 O 2 formation/decomposition mechanism is vital for the development of high-performance Li-O 2 batteries. Here, a soluble catalyst of iodosylbenzene (PhIO) that can offer a highly reversible O 2 conversion is reported for the first time. Benefiting from its ability to capture and couple the LiO 2 intermediate, which is endowed by its polarized I 3+ O 2− bond where the I atom and O atom can serve as a Lewis acidic site and basic site (dual site) to interact with O 2 − and Li + , respectively, the formation and decomposition of Li 2 O 2 by a one-electron pathway can be effectively promoted, thus greatly improving the electrode surface passivation issue and the reaction kinetics. In addition, the side reactions caused by the traditional high-reactive LiO 2 intermediate can also be effectively suppressed by forming a series of low-reactive intermediates (LiO 2 3PhIO, (LiO 2 ) 2 4PhIO, and Li 2 O 2 4PhIO) instead. Consequently, the PhIO-catalyzed Li–O 2 batteries exhibit a low overpotential, a large capacity, and a good cyclability.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
·
IF 4.65
Siqi Zhang,Ying Wang,Dan Li,Ziye Kang,Feilong Dong,Haiming Xie,Jia Liu
The synergistic effect between noble metal and spinel-type compounds is beneficial for enhancing the electrochemical performance in a Li–O 2 battery. Herein, Ru-impregnated needle-like NCO embedded in porous carbon textiles (CTs) (x wt% Ru@NCO/CTs (x = 0, 0.5, 1, 2, and 5)) is applied as a flexible and binder-free O 2 electrode for Li–O 2 batteries. The NCO structure can benefit to the Li + migration, O 2 diffusion, and Li 2 O 2 accommodation. The Ru nanoparticles can promote OER and ORR reaction kinetics and lower the overpotential. A flexible Li–O 2 cell with 1 wt% Ru@NCO/CTs exhibits a good cyclic stability of 360 cycles with an overpotential of 0.78 V at a constant current density of 200 mA/g, a considerable rate performance, a high reversibility with the Li 2 O 2 formation and its reverse decomposition, and a good flexibility stability under bending and twisting at the different conditions. This work can contribute to the development of electrode material and its architecture design for portable and wearable devices .
研究领域:
材料科学
·
能源存储
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产品关联
DOI
高影响因子
Energy Storage Materials
·
2017
·
IF 0
Feilong Qiu,Xiaoyu Zhang,Yu Qiao,Xueping Zhang,Han Deng,Tianrui Shi,Ping He,Haoshen Zhou
Li metal is used as anode for Li–O 2 batteries because of its high specific capacity and low negative electrochemical potential. However, Li metal exhibits low Coulombic efficiency and limited cycle life, which hinder its practical use. In this study, we demonstrate that the performance of the Li metal anode was significantly improved by cycling in O 2 -rich electrolyte. In the presence of sufficient O 2 , the growth of Li dendrites was suppressed by the formation of flexible and mechanical strong solid electrolyte interphase layers. Consequently, Li metal anode remained stable over 800 cycles with 98.7% Coulombic efficiency. The origination of the superior performance was further analyzed through ion etching-assisted XPS and in situ electrochemical Raman spectroscopy . Our research provides a distinct and effective approach used to improve the stability and reversibility of Li metal anodes and reveal the superiority of Li metal systems in the presence of sufficient O 2 for Li-O 2 battery.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Suqing Wu,Haiyang Hu,Yan Lin,Junliang Zhang,Yun Hang Hu
TiO 2 is widely exploited as a photocatalyst to degrade antibiotic residues in water under UV irradiation, but it is inefficient for visible light photocatalysis due to its large band gap. Herein, it is the first time to report the photodegradation of tetracycline (TC) over TiO 2 under visible light irradiation. 25.1% of removal efficiency for TC was achieved even under 700 nm light irradiation. Furthermore, it was demonstrated that O 2 − species, which were generated from photoexciting of a surface complex between TC molecules and TiO 2 , played a critical role in the visible light photocatalytic degradation of TC. In addition, it was found that the visible light photocatalytic degradation generated different active species and intermediate products from those under UV irradiation. N-doped TiO 2 exhibited even better performance for visible-light photocatalytic degradation of TC with higher removal efficiency and larger mineralization rate, which followed different degradation-mechanism.
研究领域:
环境科学
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化学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2026
·
IF 5.9
Qiwei Zhong,Yueyang Liu,Jiayu Song,Yuchao Cui,Haozhe Li,Li Zhao
Fe/Ti co-doping converts the P2 phase to the OP4 phase and suppresses the undesirable P2-O2 phase transition. • Fe/Ti co-doping breaks the Na + /vacancy ordering and improves sodium ion transport capability. • Ti doping can shorten the TM-O bonds and lengthen the Na-O bonds. P2-type Na 2/3 Ni 1/3 Mn 2/3 O 2 is regarded as a promising cathode material for sodium-ion batteries owing to its high specific capacity and low cost. Nevertheless, its practical application is hindered by irreversible structural degradation and rapid capacity decay associated with the detrimental P2–O2 phase transition during deep Na + extraction. In this work, Fe and Ti are co-incorporated into Na 2/3 Ni 1/3 Mn 2/3 O 2 via a sol-gel method to enhance structural stability. Rietveld refinement of X-ray diffraction (XRD) patterns indicates that Ti doping shortens TM–O bonds and enlarges Na + diffusion channels by increasing Na-O distances, thereby enhancing structural stability and Na + transport kinetics. In situ XRD analyses reveal that Fe/Ti co-doping regulates the phase transition pathway from the irreversible P2–O2 phase transition to a reversible P2–OP4 phase transition, effectively mitigating structural degradation during cycling. Electrochemical measurements demonstrate that optimized Fe/Ti co-doping enhances the overall electrochemical performance. The optimized composition, Na 2/3 Ni 1/4 Fe 1/12 Mn 7/12 Ti 1/12 O 2 , exhibits excellent cycling stability with a capacity retention of 82.33% after 50 cycles at 0.2 C, and delivers a specific capacity of 61.43 mA h g −1 at a high rate of 5 C. This study demonstrates that the combination of sol-gel synthesis and co-doping engineering provides an effective strategy for designing high-performance cathode materials for sodium-ion batteries.
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DOI
高影响因子
Nature Communications
·
2026
·
IF 18.1
Li Yuzhen,Ding Yafei,Li Yongji,Zhang Xuetong
Wearable chemical microreactors are highly desirable for life-sustaining processes such as on-demand oxygen-generation, but their development has been hindered by the lack of materials that combine dynamic robustness, textile integrability, and ultra-efficient fluid transport. Herein, we show a wearable microreactor based on armored aramid aerogel hollow fibers. Reinforcing these fibers with heat-shrink tubing yields textile-compliant elasticity while preserving their nanoporous structure. Subsequently, infusing a low-surface-energy liquid into the mesopores of aerogel walls creates a nanoconfined lubricant layer that reduces microfluidic drag by up to 68.1% compared to solid-walled channels. Finally, a O 2 -generated wearable microreactor prototype (268 g) achieves high space-time yield, 100% oxygen purity, and maintaining oxygen-supply under physical stress. In vivo trials at 4998 meters altitude demonstrate rapid blood oxygen saturation recovery, effectively alleviating acute hypoxia. This work establishes a materials paradigm that overcomes the trade-off between wearability and continuous-flow microreactor in on-body chemical synthesis.
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DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2020
·Vol. 27
·期 25
·31289-31299
·
IF 3.056
Zhu Mengyu,Lu Jun,Hu Yadong,Liu Ying,Hu Shuheng,Zhu Chengzhu
The superoxide anion radical (O 2 •− ) is one of the most predominant reactive oxygen species (ROS), which is also involved in diverse chemical and biological processes. In this study, O 2 •− was generated by irradiating riboflavin in an O 2 -saturated solution using an ultraviolet lamp ( λ em = 365 nm) as the light source. The photochemical reduction of 1,4-benzoquinone ( p -BQ) by O 2 •− was explored by 355-nm laser flash photolysis (LFP) and 365-nm UV light steady irradiation. The results showed that the photodecomposition efficiency of p -BQ was influenced by the riboflavin concentration, p -BQ initial concentration, and pH values. The superoxide anion radical originating from riboflavin photolysis served as a reductant to react with p -BQ, forming reduced BQ radicals (BQ •− ) with a second-order rate constant of 1.1 × 10 9 L mol −1 s −1 . The main product of the photochemical reaction between p -BQ and O 2 •− was hydroquinone (H 2 Q). The present work suggests that the reaction with O 2 •− is a potential transformation pathway of 1, 4-benzoquinone in atmospheric aqueous environments.
研究领域:
环境科学
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化学
·
生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2013
·Vol. 18
·期 3
·739-745
·
IF 2.279
Song Ming,Zhu Ding,Zhang Lei,Wang Xiaofei,Mi Rui,Liu Hao,Mei Jun,Lau Leo W. M.,Chen Yungui
Discharge/charge characteristics of Li–O 2 batteries at a test temperature of 343 K, using Super P carbon electrodes, have been explored in this paper based on ether-based electrolytes. Compared with ambient temperature, high temperature significantly influences the discharge/charge process of Li–O 2 batteries since discharging capacity increases at about 80 % and charging voltage plateau decreases from 4.2 to 3.5 V. The stability of stainless steel mesh with electrolyte at 343 K has been researched using cyclic voltammetry. This paper lays the bases for further research on Li–O 2 batteries in high-temperature areas.
研究领域:
电化学
·
材料科学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yong Chen,Huiping Zeng,Jiaxin Xu,Dong Li,Jie Zhang
Currently, there are well-operated iron removal water plants in the northeast region of China. Among them, the backwash process produces a large amount of iron-containing sludge (IS) year by year, which can cause some harm to the environment if not treated. The main form of existence for IS is amorphous γ-FeOOH, and this work demonstrates that IS is a natural and highly active catalyst for periodate(PI). Moreover, IS showed strong stability in environmental factor effects and reproducibility experiments. EPR with quenching experiments proved that IS could activate PI to produce •OH, O 2 •− , 1 O 2 , and IO 3 • . In the degradation experiments where methylene blue was chosen as the model pollutant, IO 3 • , and 1 O 2 were the substances that served the prominent role in degradation. This work provides an inexpensive and feasible way to dispose of waste iron-containing sludge from water plants and provides fundamental insights into the degradation mechanism of organic pollutants through the activation of PI by IS.
研究领域:
环境科学
·
化学工程
·
废水处理
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）