INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
·
2024
·
IF 5
Deliang Zeng,Tianyong Mao,Ziyi Zhang,Jing Dai,Junpeng Ouyang,Zhipeng Xie
We report the performance of an all-rare earth redox flow battery with Eu 2+ /Eu 3+ as anolyte and Ce 3+ /Ce 4+ as catholyte for the first time, which can be used for large-scale energy storage application. The cell reaction of Eu/Ce flow battery gives a standard voltage of 1.90 V, which is about 1.5 times that of the all-vanadium flow battery (1.26 V). Large standard voltage is conducive to the improvement of battery energy density and power density. The Eu 2+ /Eu 3+ electrode reaction in a NaCl solution on platinum electrode was investigated detailedly using cyclic voltammetry, linear sweep voltammetry, tafel plot and chronoamperometry. Unlike zinc-cerium flow battery, the active species of Eu/Ce flow battery are always present in the electrolyte, and no liquid-solid phase transition occurs. Thus, Eu/Ce flow battery is free of the problems associated with dendrite growth and theoretically have a longer cycle lifetime. The negative electrolyte is very sensitive to oxygen and can directly cause battery failure if exposed to air. The average energy efficiency of Eu/Ce flow battery exposed to air is only 22.0 %. However, the average energy efficiency of Eu/Ce flow battery stripped of oxygen reaches 82.7 % at 25 mA/cm 2 . Preliminary experimental studies have shown that Eu/Ce flow batteries are a promising method for large-scale energy storage.
研究领域:
能源存储技术
·
电化学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Dongyan Zhou,Shaoyong Cai,Haoyang Sun,Gansheng Zhong,He Zhang,Dazhi Sun,Fengyu Su,Mengyu Deng,Yanqing Tian
Dissolved oxygen (DO) sensors for the practical application usually require good resistance to complex and extreme environments, such as acidic or alkaline corrosion , seawater sediment erosion, protein or bacteria adhesion, etc. Diatom frustules (DFs) are protective shell structures extracted from diatoms, which have delicate hierarchical pores and a large specific surface area, showing their utilization potential as oxygen sensing materials. Herein, we developed a superhydrophobic DO sensor which use the DFs as matrix materials . The sensor was fabricated by spraying the mixture of 1 H,1 H,2 H,2 H-perfluorooctyltriethoxysilane (PFOTS) modified DFs and oxygen-sensitive probe platinum (II)− 5,10,15,20-tetrakis-(2,3,4,5,6-pentafluorophenyl)-porphyrin (PtTFPP) on the bonding substrate. In the DO sensor, DFs provides a tough micro/nano surface structures and PFOTS offers low surface energy, both of which led to a robust superhydrophobic surface of the sensor. Because of the porous structure of DFs and the diffusion enhancement effect of fluorine on oxygen, the sensor has high DO sensitivity , I 0 /I 100 which represents for oxygen sensitivity reaches up to 129. Additionally, the sensor showed good tolerance on mechanical abrasion , acidic or alkaline corrosion and biofouling. Owing to these good performances, the use of DFs is expected to provide a new strategy for the rational design of high performance DO sensing devices.
研究领域:
材料科学
·
生物工程
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产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2018
·Vol. 29
·期 14
·145704
·
IF 3.404
Zhijuan Sun,Chenxin Cai,Fei Guo,Changhuai Ye,Yingwu Luo,Shuming Ye,Jianchao Luo,Fan Zhu,Chunyue Jiang
Immobilization of the oxygen-sensitive probes (OSPs) in the host matrix greatly impacts the performance and long-term usage of the optical dissolved oxygen (DO) sensors. In this work, fluorescent dyes, as the OSPs, were encapsulated with a crosslinked fluorinated polymer shell by interfacial confined reversible addition fragmentation chain transfer miniemulsion polymerization to fabricate oxygen sensitive polymeric nanocapsules (NCs). The location of fluorescent dyes and the fluorescent properties of the NCs were fully characterized by fourier transform infrared spectrometer, x-ray photoelectron spectrometer and fluorescent spectrum. Dye-encapsulated capacity can be precisely tuned from 0 to 1.3 wt% without self-quenching of the fluorescent dye. The crosslinked fluorinated polymer shell is not only extremely high gas permeability, but also prevents the fluorescent dyes from leakage in aqueous as well as in various organic solvents, such as ethanol, acetone and tetrahydrofuran (THF). An optical DO sensor based on the oxygen sensitive NCs was fabricated, showing high sensitivity, short response time, full reversibility, and long-term operational stability of online monitoring DO. The sensitivity of the optical DO sensor is 7.02 (the ratio of the response value in fully deoxygenated and saturated oxygenated water) in the range 0.96–14.16 mg l−1 and the response time is about 14.3 s. The sensor's work curve was fit well using the modified Stern–Volmer equation by two-site model, and its response values are hardly affected by pH ranging from 2 to 12 and keep constant during continuous measurement for 3 months. It is believed that the oxygen sensitive polymeric NCs-based optical DO sensor could be particularly useful in long-term online DO monitoring in both aqueous and organic solvent systems.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
Nano Research
·
2023
·Vol. 16
·期 11
·12697-12705
·
IF 9.9
Gao Xinshuang,Zheng Jia-jia,Li Hanbo,Cai Rui,Gao Xingfa,Wu Xiaochun
Nanozymes, as a novel form of enzyme mimics, have garnered considerable interest. Despite overcoming the main disadvantages of their natural analogs, they still face challenges such as restricted mimic types and low substrate specificity. Herein, we introduce a reactive ligand modification strategy to diversify enzyme mimic types. Specifically, we have utilized helical plasmonic nanorods (HPNRs) modified with para -nitrothiophenol (4-NTP) to create an oxygen-sensitive nitroreductase (NTR) with light-controllability. HPNRs act as a light-adjustable source of nicotinamide adenine dinucleotide/nicotinamide adenine dinucleotide phosphate (NAD(P)H), providing photon-generated energetic electrons to adsorbed 4-NTP molecules. In the presence of O 2 , the activated 4-NTP transfers the captured electron to the adsorbed O 2 , mimicking the electron transfer process in its natural counterpart. This enhanced O 2 activation notably boosts the oxidative coupling of para -aminothiophenol (4-ATP). Density functional theory (DFT) calculations reveal that hot electrons injected into the lowest unoccupied molecular orbital (LUMO) energy level of 4-NTP can be transferred to that of molecular oxygen. In conclusion, our findings underline the potential of the reactive ligand modification strategy in developing new types of enzyme reactions, which opens up promising avenues for the enhancement and diversification of nanozyme functionalities.
研究领域:
生物化学
·
纳米生物学
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催化科学
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产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2025
·
IF 3.7
Shigang Wan,Dongxuan Wang,Yizhong Shi,Shuoran Chen,Changqing Ye
Graphical Two photochemically deoxygenating compounds, PEG-200 and PEGDA-575, have been used as solvents for triplet-triplet annihilation upconversion in air, with both serving as sensitized singlet oxygen scavengers. A high-level information encryption platform has been developed using Pt(OEP)/DPA/PEGDA-575 or Pt(OEP)/DPA/PEGDA-575/PEG-200 ink that enables data to be read under specific light or at a certain time and erased by light exposure. Photochemical deoxygenation offers a promising solution to the oxygen sensitivity issue in Triplet-triplet annihilation upconversion (TTA-UC). This study utilized polyethylene glycol (PEG)-200 and polyethylene glycol diacrylate (PEGDA)-575 as solvents and singlet oxygen scavengers for TTA-UC conducted in air. The upconversion efficiency of Pt(OEP)/DPA in aerated PEG-200 is similar to that in nitrogen-saturated PEG-200. Prolonged 532 nm light irradiation causes a PEGDA-575 solution of Pt(OEP)/DPA to undergo photoinitiated polymerization via homomolecular TTA, leading to a reduction in DPA's upconversion emission and an increase in Pt(OEP)’s phosphorescence. These results enabled the development of a high-level information encryption platform using the direct-writing method with Pt(OEP)/DPA/PEGDA-575 or Pt(OEP)/DPA/PEGDA-575/PEG-200 ink. The information is only readable under certain lighting conditions or at specific times and can be erased by exposure to light.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD HYDROCOLLOIDS
·
2024
·
IF 11
Bo Qiu,Huijuan Jing,Shengyi Han,Shuobo Zhang,Furong Ba,Lvwan Xu,Siyuan Xie,Wang Gao,Yilun Huang,Hang Xiao,David Julian McClements,Björn Berglund,Lanjuan Li,Mingfei Yao
Faecalibacterium prausnitzii ( F. prausnitzii ) exhibits a variety of biological functions that make it suitable for use as a next-generation probiotic . However, its high sensitivity to oxygen and digestive fluids currently limits its application. Riboflavin is known to support the growth of F. prausnitzii in oxygen environments, but it is important that it is in close proximity to the probiotics. Layer-by-layer assembly can be used to form protective coatings around probiotics, which can protect them from adverse environmental conditions. Moreover, riboflavin can be conjugated to these coatings, thereby increasing its efficacy by bringing it close to probiotic surfaces. In this study, we therefore evaluated the potential of electrostatic layer-by-layer assembly to protect F. prausnitzii by coating them with riboflavin-alginate and glycol-chitosan layers. Initially, we showed that riboflavin could be successfully conjugated to alginate, with a grafting ratio of around 4.35%. Then, the layer-by-layer method was used to coat F. prausnitzii using cationic glycol chitosan and anionic riboflavin-alginate. The coating formed was found to have a thickness of approximately 18.5 nm. Encapsulation did not adversely affect the growth of F. prausnitzii , but it significantly enhanced its resistance to oxygen and digestive fluids. The encapsulated probiotic was shown to have enhanced mucoadhesive properties using an in vitro intestinal monolayer model. Furthermore, the encapsulated probiotics colonized the colons of rats for longer than nonencapsulated ones. These results show that coating F. prausnitzii with riboflavin-rich biopolymer layers improves its resistance to oxygen and digestive fluids, and enhances its mucoadhesion and colonization properties, which should enhance its potential as an orally administered probiotic.
研究领域:
微生物学
·
药物递送
·
功能性食品
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 25
·e53969
·
IF 3
Jiayan Shi,Chunhua Wei,Mengyu Deng,Lei Liang,Yanqing Tian
Pressure-sensitive paints (PSPs) have been demonstrated to be very important for aerodynamics research. In order to improve the pressure sensitivity and adhesion ability of PSP, herein, a series of fluorine-containing copolymers compositing of an oxygen and pressure-responsive probe derived from platinum(II)-5,10,15,20-tetrakis-(2,3,4,5,6-pentafluorophenyl)-porphyrin (PtTFPP) named as poly[(tBs) a - co -(TFEM) b - co -(PtTFPP-1MA) c ] were synthesized and investigated as PSPs. These PSPs were constructed with different fluorine ratios for the investigation of the effect of fluorine contents on PSPs. Especially, PSP (F 0.33 ) with the trifluoroethyl methacrylate (TFEM) molar ratio of 33% in the copolymers could adhere well to the surface of an aircraft model. F 0.33 showed high oxygen sensitivity ( I 0 / I 100 = 32.87), reasonable response time to oxygen (44 s), high pressure sensitivity ( S P = 0.75%/kPa at 20°C) and low temperature response ( S T = −0.77%/°C at 100 kPa). F 0.33 was further sprayed on the surface of a delta wing of an aircraft model and its pressure response was verified in a wind tunnel. The data from F 0.33 film at the same wind speed and position were close to the pressure data measured by using traditional method using open pressure holes, showing the potential application of these PSPs.
研究领域:
材料科学
·
空气动力学
·
聚合物化学
·
传感器技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）