CELLULOSE
·
2024
·Vol. 31
·期 14
·8787-8803
·
IF 4.9
Wang Siqi,Yang Yueqi,Wang Chang,Jiao Yunhong,Wang Chunzheng,Ma Haiyun
In modern society, with the rapid increase in energy consumption, there is a growing interest in the effective utilization of bio-resources. Biomass aerogels have considerable academic research value due to their eco-friendly attributes and renewable nature. In this work, sodium alginate (SA) and sodium lignosulfonate (SLS) are employed as the matrix, which are dually cross-linked with Ca 2+ and bis[tetrakis(hydroxymethyl)phosphonium] sulfate (THPS). Subsequently, a well-formed aerogel (CA-SP) is obtained through the lyophilization process. The formed dual crosslinking network and the “egg-box” structure endow the CA-SP aerogel with superior flame retardancy and thermal insulation properties, as evidenced by a limiting oxygen index value of 40.8%, achievement of the UL94 V-0 rating and low total heat release (1.35 MJ·m −2 ). Moreover, the THPS simultaneously endows the SA-SP aerogel with excellent flame retardancy and antimicrobial effect. The exceptional flame retardancy, smoke suppression capabilities, and antimicrobial effects of the CA-SP aerogel expand its prospects for application.
研究领域:
材料科学
·
生物工程
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2018
·Vol. 11
·期 11
·5968-5977
·
IF 7.994
Lin Wanzhen,Lian Yaping,Zeng Guang,Chen Yanyan,Wen Zhenhai,Yang Huanghao
Recent theoretical studies revealed that two-dimensional (2D) antimonene has attractive characteristics, such as superior photothermal conductivity, absorption over a wide range, high mobility, and good spintronic properties. Herein, we report a reliable liquid phase exfoliation (LPE) route for the preparation of high-quality high-stability atomically thin (AT) antimonene via high ultrasonic power. The AT antimonene delivers a high specific capacity of up to 860 mA·h·g –1 , with high rate capability and good cycling stability as an anode of a sodium ion battery (SIB). The good conductivity and 2D structure endow AT antimonene with more active sites for sodium storage, a facilitated pathway for electron transfer and mass transport, and the capability to reduce the volume expansion during the discharge–charge process.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Wensheng Yang,Bei Wang,Qian Chen,Qian Zhao,Qin Zhang,Shengshang Lu,Yue Gao,Xinhai Wang,Quan Xie,Yunjun Ruan
Na 3 V 2 (PO 4 ) 3 (NVP), which is known as a sodium superionic conductor (NASICON), has been successfully developed as an excellent cathode material for sodium-ion batteries (SIBs). However, the capacity of NVP quickly fades when used in an aqueous electrolyte. Herein, the charge storage and capacity attenuation mechanisms of carbon-coated NVP (NVP@C) were carefully investigated by systematic material characterization and density functional theory (DFT) calculations. According to the results, protons in the aqueous electrolyte diffuse into the surface of NVP@C to occupy the sodium site and attack the nearby phosphates during the charge–discharge cycles, leading to the deformation and breakage of the P O V bond. The distorted phosphates on the surface of NVP@C gradually dissolve into the electrolyte, causing a decrease in capacity. To stabilize the phosphates on the surface of NVP, DFT calculations suggest that iron doping of NVP can effectively relieve the deformation of the P O V bond and suppress the capacity decay. The as-prepared Na 3 V 1.5 Fe 0.5 (PO 4 ) 3 @C (NV 1.5 Fe 0.5 P@C) has a capacity retention of 95% in the first ten cycles, while NVP@C retains only 55% of the initial capacity in the same number of cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2021
·Vol. 104
·期 9
·4782-4787
·
IF 3.784
Lilian Yang,Youling Hou,Guishang Pei,Yuntao Xin,Xuewei Lv
Sodium-ion batteries (NaIBs) have attracted extraordinary attentions as a promising scalable energy storage alternative to current lithium-ion batteries (LIBs), owing to their natural abundance and low costs. Sodium trititanate (Na 2 Ti 3 O 7 ) is a promising material as the material of NaIBs with low potential and high theoretical capacitance. In order to better understand their service performance when utilized in rechargeable NaIBs, studies on thermodynamic properties of Na 2 Ti 3 O 7 are indispensable. However, an extensive literature review revealed that the heat capacity of Na 2 Ti 3 O 7 is established with divergences, especially for high-temperature region. Therefore, the 99.5% purity of Na 2 Ti 3 O 7 powder was first Synthesized through solid-state reaction with sodium carbonate (Na 2 CO 3 ) and titanium dioxide (TiO 2 ) as raw materials. The as-prepared samples were used to measure the heat capacity from 573 to 1323 K which was carried out with multihigh temperature calorimeter (MHTC) 96 line. The temperature dependence of heat capacity was modeled as a function: Cp =255.51073 + 0.06059 T − 3.86912 × 106 T −2 (J mol −1 K −1 ) (298.15 - 1403 K), and then used for computing changes in enthalpy, entropy, and Gibbs free energy. Heat capacity of Na 2 Ti 3 O 7 from 0 to 1403 K was given for future application of Na 2 Ti 3 O 7 in rechargeable batteries.
研究领域:
材料科学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 48
·25546-25555
·
IF 14.511
Rui Zhang,Yan Wang,Runnan Liu,Dan Sun,Yougen Tang,Zhiyong Xie,Haiyan Wang
Sodium-ion batteries (SIBs) demonstrate great application prospects for large-scale energy storage owing to the merits of low cost and abundant sodium resources. Nevertheless, the low initial coulombic efficiency of anode materials inevitably consumes the limited Na+ from the cathode, leading to the loss of reversible capacity and inferior energy density of the full-cell. Herein, a multifunctional cathode sodiation additive, 1,2,4-triazole sodium (TS), is first proposed to offset the Na loss in sodium ion full-cells. The energy density of the as-constructed hard carbon//Na3V2(PO4)3 full cell with 10 wt% TS is obviously improved from 180 to 196 W h kg−1 based on the total mass of the cathode, additive, and anode. More importantly, this TS additive demonstrates multifunctional effects on the electrode. It can further modify the conductive framework in the electrode and build a desirable NaF-rich cathode electrolyte interface on the surface of the cathode, thus accelerating the sodiation/desodiation process. Furthermore, this additive can also enable the facile fabrication of a flexible Na3V2(PO4)3 electrode with high performance. This work provides a new-type of cathode sodiation additive with multiple roles for advanced SIBs.
研究领域:
能源存储
·
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INFLAMMATION
·
2012
·Vol. 35
·期 5
·1676-1684
·
IF 1.747
Liu Tengfei,Li Jing,Liu Yuxin,Xiao Nan,Suo Haitao,Xie Kun,Yang Chunliu,Wu Chen
Short-chain fatty acids (SCFAs) produced by the colonic bacterial fermentation of dietary fiber contribute a significant proportion of daily energy requirement. Furthermore, these compounds are modulators of macrophage function and potential targets for the development of new drugs. The aims of this study were to evaluate the effects of three types of SCFAs (sodium acetate (NaAc), sodium propionate (NaP), and sodium butyrate (NaB)) on the production of NO and inducible nitric oxide synthase (iNOS) and proinflammatory and antiinflammatory cytokines (tumor necrosis factor-α (TNF-α) and interleukin (IL-1, IL-6, and IL-10)) and to observe the effect of NaAc on inhibiting lipopolysaccharide (LPS)-induced NF-κB activation in LPS-stimulated RAW264.7 cells. The results show that three types of SCFAs (acetate, propionate, and butyrate) reduced the production of proinflammatory factors, including TNF-α, IL-1β, IL-6, and NO, and inhibited the vitality of iNOS. Meanwhile, SCFAs enhanced the production of antiinflammatory cytokine IL-10 in lower concentrations (1–1,200 μmol/L). Like NaB, NaAC inhibited LPS-induced NF-κB activation. These results may hold promise on the role that SCFAs have on the prevention and treatment of various inflammatory conditions.
研究领域:
免疫学
·
药理学
·
细胞生物学
·
炎症研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xuerui Bai,Maiqian Nie,Zhenjun Diwu,Lei Wang,Hongyun Nie,Yan Wang,Qiuyue Yin,Bo Zhang
2-Hydroxymuconic semialdehyde (2-HMS) is a useful intermediate in organic synthesis, but there are few reports for its preparation. 2-HMS accumulates in phenol-containing wastewater treated with Pseudomonas stutzeri N2. This work has studied the extraction of 2-HMS so that the phenolic wastes of high concentration may be used to produce 2-HMS. When 4.25 mmol/L phenol was degraded by Pseudomonas stutzeri N2, the accumulated 2-HMS can reach 3.79 ± 0.08 mmol/L within 30 h. A saturated solution of NaHSO 3 was added into the 2-HMS culture, and white rod-like precipitates formed gradually. Through SEM, XRD and FT-IR, the precipitates were identified as monoclinic hexagonal crystals of α-hydroxy sulfonate sodium with high purity. In the presence of NaOH, α-hydroxy sulfonate sodium could be reduced to the desired 2-HMS product. The optimized conditions were characterized to be 3 mol/L NaOH solution, 5 min and 50 °C. The conversion rate of α-hydroxy sulfonate sodium was up to 87.3 ± 0.2%, and 0.42 ± 0.02 mmol/L 2-HMS were obtained.
研究领域:
环境科学
·
生物技术
·
有机化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Yu Niu,Lingling Xie,Tao Zhou,Jing Xu,Youchi Ding,Qing Han,Xuejing Qiu,Yongmei Xiao,Yongxia Miao,Limin Zhu,Xiaoyu Cao
In this work, nano LiV3O8(LVO) was synthesized using the rheological phase reaction method. Subsequently, after ultrasonic and heat treatment at 300 °C, the nano LVO Ut-300 was obtained and performed as cathode material in Na-ion batteries for the first time. Brunauer–Emmett–Teller analysis indicated that the specific area increased after ultrasonic treatment, which was conducive to the shuttling of sodium ions and enhancement of the electrochemical performance. The X-ray diffraction patterns displayed stable nano LVO Ut-300 material structure and larger interlayer spacing, and SEM and TEM performed more regular morphology. After the electrochemical tests, the nano LVO Ut-300 cathode delivered a high discharge capacity of 153.8 mA h g–1 in the voltage range of 1.8–4.0 V at 30 mA g–1. Meanwhile, the storage mechanism of Na+ was further explored by XPS, and kinetics characteristics of LVO/Na cells were revealed by pseudocapacitance analysis and galvanostatic intermittent titration technique (GITT) tests. In summary, nano LVO was processed by the ultrasonic method followed by subsequent heat treatment, which could effectively improve the electrochemical behavior of LiV3O8 as cathode materials of secondary Na-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xiaomin Zhang,Chengfei Zhu,Xiaoli Yang,Yuanfeng Ye,Guozhen Zhang,Feng Yu,Peng Chen,Yong Zhu,Qiannan Kang
The biocompatibility and salient gelling feature of alginate via forming the interpenetrating network structure has received extensive interests for different applications. Traditional alginate hydrogels freeze at low temperature and evaporate easily at room temperature, leading to reduced performance. Consequently, it is crucial to develop methods to prevent alginate hydrogel from freezing at subzero temperature and dehydration at normal temperature to maintain the performance stability. Utilizing polyacrylic acid, sodium alginate, and acrylamide-hydroxyethyl methacrylate copolymers as flexible matrix materials, this study develops a wearable silica (SiO 2 )/carbon nanotubes (CNT)/sodium ions (SiO 2 /CNT/Na + ) modified sodium alginate hydrogel strain sensor characterized by high sensitivity, flexibility, and anti-freezing and anti-drying properties. The hydrogel doped with NaCl (50 mg), CNT (10 mg) and M-SiO 2 (200 mg) shows excellent mechanical and electrical properties, the tensile strength is 436 KPa, the break elongation is 426 %, the elastic modulus is 99 KPa, and the toughness is 897 kJ/m 3 . The modified sodium alginate hydrogel used as strain sensor shows fast response time (∼100 ms), high sensitivity factor and excellent stability. The strain sensor exhibits excellent flexibility, ductility, self-adhesion, anti-freezing and anti-drying properties, significantly enhancing its strain sensing application field.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Research
·
2024
·
IF 9.5
Li Chuang,Zheng Xueying,Sun Minghao,Tian Fei,Lei Danni,Wang Chengxin
The energy density of batteries can be increased by using high-load cathode material matched with sodium (Na) metal anode. However, the large polarization of the battery under such harsh conditions will promote the growth of Na dendrites and side reactions. Carbon materials are regarded as ideal modify layers on Na metal anode to regulate the Na + plating/stripping behavior and inhibit the Na dendrites and side reactions due to their light weight, high stability and structural adjustability. However, commonly used carbon nanotubes and carbon nanofibers cannot enable these modified Na metal anodes to operate stably in full batteries with a high-load cathode (> 15 mg·cm −2 ). The most fundamental reason is that abundant polar functional groups on the surface bring serious side reactions and agglomerations lead to uneven Na + flow. Here, a proof-of-concept study lies on fabrications of carbon nanospheres with small amount of polar functional groups and sodiophobic components on the surface of Na metal anode, which significantly enhances the uniformity of the Na + plating/stripping. The assembled symmetric battery can cycle stability for 1300 h at 3 mA·cm −2 /3 mAh·cm −2 . The full battery with high-load Na 3 V 2 (PO 4 ) 3 (30 mg·cm −2 ) maintains a Coulombic efficiency of 99.7% after 100 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2023
·Vol. 16
·期 15
·e202300244
·
IF 8.4
Shuai Tong,Hui Pan,Hang Liu,Xiaoyu Zhang,Xiangyu Liu,Min Jia,Yahao Kang,Yong Yuan,Xinyi Du,Xiaohong Yan
Graphical The improvement of the energy density of Na 3 V 2 (PO 4 ) 2 F 3 (NVPF) is now related to the utilization of the third Na + , which was reported to be electrochemically inaccessible. Our research revealed that Ti-doped Na 3 V 2 (PO 4 ) 2 F 3 (NVTPF) could be overcharged at approximately 4.9 V without forming the irreversible metastable phase, which means the electrochemical inactive Na + could be effectively attracted without affecting the subsequent electrochemical behavior. Polyanionic material, specifically the NASICON-type material, is considered a promising cathode material for Na-ion batteries (SIBs) because of its stable structure and high operating voltage. Further, it improves the energy density correlated with the well utilization of all Na in the compound. For Na 3 V 2 (PO 4 ) 2 F 3 (NVPF), the extraction of the third Na, reported as the electrochemical inactivated, can be realized at a high voltage region while forming an irreversible tetragonal phase. In this study, we introduce Ti doping to the Na 2 VTi(PO 4 ) 2 F 3 (NVTPF) material; we reveal that the Ti-doped NVTPF could effectively suppress the irreversible phase transformation, thus successfully harnessing Na in a wide voltage range. Experimental study discloses that the Ti-substituted Na 2 VTi(PO 4 ) 2 F 3 could take up the Na + from Amam phase to Cmc21 phase between 1.0 V and 4.8 V reversibly accounting for the 2 Na + transportation that shows favorable Na + kinetics and structural stability. Our research provides the strategy to stabilize the polyanion structure upon charging at a high voltage range and inspires the utilization of full sodium in the polyanionic materials, which could be considered as a material design for future conventional applications.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Xiyong Chen,Mingxin Zhou,Junzuo Shi,Tianquan Liang,Jie Zeng,Xia Yan,Nengneng luo,Weizhou Li,Yuezhou Wei
The effect of nominal Na/Bi ratio on the microstructure and electrical conductivity of A-site fully stoichiometric sodium bismuth titanates , Na 0.5+ x Bi 0.5− x TiO 3− δ , was investigated in this study. Bulk samples with x = 0, 0.01, 0.03, 0.05, 0.07, and 0.1 were prepared by conventional solid state reaction method. The as-calcined powders primarily exhibited the perovskite structure, which was identified by X-ray diffraction. Electron microscopic investigation of the sintered samples, however, revealed the presence of secondary phases, the amounts of which were found to increase with increasing Na/Bi ratio. Further elemental analysis by energy dispersive spectroscopy indicated that the secondary phases were mainly composed of sodium titanates with different Na/Ti ratios. The grain bulk and grain boundary conductivities of Na 0.5+ x Bi 0.5− x TiO 3− δ , measured by two-probe AC electrochemical impedance spectroscopy , significantly increased with increasing Na/Bi ratio when x ≤ 0.03, but remained almost constant at higher x . The synergetic effect of oxygen vacancy creation, grain size reduction, and secondary phase formation on the variation in the conductivity upon increasing the nominal Na/Bi ratio in Na 0.5+ x Bi 0.5− x TiO 3− δ was discussed.
研究领域:
材料科学
·
固态化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）