Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 21
·5579-5589
·
IF 7.779
Shiyu Yang,Ruizi Li,Zhentao Nie,Hongjian Zhang,Yu Zhang,Jixin Zhu
2D N-doped V2O3 (N-V2O3) nanosheets were fabricated as anode materials for Li-ion batteries by a facile sol–gel method and a subsequent deoxidation–nitridation strategy. Benefiting from the 3D V–V tunnel structure, sufficient active sites and nitrogen modifications, N-V2O3 nanosheets exhibit improved Li+ diffusion kinetics, robust structure and enhanced conductivity. As a result, N-V2O3 nanosheets show a high specific capacity, long cycling life and high rate capability (136 mA h g−1 even after 1000 cycles at 2 A g−1) as anode materials for Li-ion batteries. It is instructive to note that the efficient Li+ storage of N-V2O3 is dominated by intercalation pseudocapacitance. In the mechanism of intercalation pseudocapacitance, lithium ions are intercalated into the 3D V–V tunnels and adsorbed to the V–O active sites without crystalline phase transition. This mechanism combines long cycling life with short charging/discharging times, which is suitable for stable and ultrafast Li-ion storage.
✓ 已验证
DOI
高影响因子
Frontiers in Pharmacology
·
2022
·
IF 5.988
Gao Tianshu,Xu Jin,Xiao Yuxiao,Li Jiaqi,Hu Weifeng,Su Xiaoyu,Shen Xudong,Yu Wan,Chen Zhen,Huang Baosheng,Li Honglei,Wang Xing
Objective: To observe the antioxidative effects of N-(9,10-anthraquinone-2-ylcarbonyl) xanthine oxidase inhibitors (NAY) in vitro and in vivo models of hyperuricemia and explore the mechanism.Methods: A classical experimental method of acute toxicity and a chronic toxicity test were used to compare the toxic effects of different doses of NAY in mice. The hyperuricemia mouse model was established by gavage of potassium oxonate in vivo. After treatment with different doses of NAY (low dose: 10 mg/kg, medium dose: 20 mg/kg, and high dose: 40 mg/kg) and allopurinol (positive drug, 10 mg/kg), observe the levels of uric acid (UA), creatinine (CRE), and urea nitrogen (BUN) in urine and serum, respectively, and detect the activities of xanthine oxidase in the liver. The hyperuricemia cell model was induced by adenosine and xanthine oxidase in vitro. The cells were given different doses of NAY (50, 100, and 200 μmol/L) and allopurinol (100 μmol/L). Then the culture supernatant UA level of the medium was measured. The next step was to detect the xanthine oxidase activity in the liver and AML12 cells, and the levels of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), interleukin-1β (IL-1β), and NOD-like receptor thermal protein domain-associated protein 3 (NLRP3) inflammatory factors in the kidney and serum of mice. Western blot was used to detect xanthine oxidase protein expression in mouse liver tissue and AML12 cells, ASC, Caspase-1, NLRP3, GLUT9, OAT1, and OAT3 protein expression in mouse kidney tissue and HK-2 cells. Hematoxylin–eosin staining was used to stain the liver and kidney tissues of mice and observe the tissue lesions.Results: NAY had little effect on blood routine and biochemical indexes of mice, but significantly reduced the serum UA level. NAY significantly reduced the level of UA in hyperuricemia mice and cells by inhibiting xanthine oxidase activity and reduced the levels of TNF-α, IL-6, and other inflammatory factors in serum and kidney of mice. NAY can inhibit inflammation by inhibiting the NLRP3 pathway. In addition, NAY can downregulate GLUT9 protein expression and upregulate OAT1 and OAT3 protein expression to reduce the UA level by promoting UA excretion and inhibiting UA reabsorption.Conclusion: These findings suggested that NAY produced dual hypouricemic actions. On the one hand, it can inhibit the formation of UA by inhibiting xanthine oxidase inhibitors activity, and on the other hand, it can promote the excretion of UA by regulating the UA transporter. It provides new ideas for the development of hyperuricemia drugs in the future.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Wenhao Yang,Zhicong Ni,Bingnan Deng,Jiyue Hou,Rongwei Huang,Dan You,Keyi Wei,Yiyong Zhang,Xue Li,Yingjie Zhang
Lithium-sulfur batteries is regarded as one of the most promising battery systems for the next generation because of its high energy density , low cost and environmental friendliness. However, the high solubility of long-chain polysulfides leads to low active sulfur utilization and strong shuttle effect, resulting in a rapid decline in battery capacity and poor cycle performance, which seriously hinders the practical application of lithium-sulfur batteries (LSB). In this work, we devised a simple method to prepare N-doped Sponge Carbon (SC), which has a rich three-dimensional connection structure, high electronic conductivity, and reasonable N-doped composition. Applied as the interlayer of lithium-sulfur batteries, the N-doped Sponge Carbon (SC) can adsorb long-chain LiPSs dissolved in the electrolyte and accelerate the conversion of long-chain LiPSs to short-chain ones, thereby realizing the secondary utilization of dissolved active sulfur and inhibiting the shuttle effect. Therefore, the lithium-sulfur batteries with a supplemental interlayer provided a large reversible capacity of 834.27 mAh g −1 at 0.5 C and maintained the high specific capacity of 804.9 mAh g −1 after 100 cycles, the capacity attenuation rate was as low as 0.035% per cycle. In addition, when the rate increased to 2 C, the discharge-specific capacity of 618.18 mAh g −1 can still be obtained. Most importantly, this Sponge Carbon interlayer may be of great significance for the commercial application of the high-performance lithium-sulfur batteries.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Hui Yu,Xinyu Li,Chuanqi Geng,Xiaojia Wu,Fan Zhang,Shichao Tian,Zhiyong Zhou,Zhongqi Ren
The separation of aromatic and aliphatic hydrocarbons is one of the most challenging and energy-consuming operations in the petrochemical industry. In this study, a number of N -methylpyrrolidone (NMP)-based coordinated ionic liquids (ILs) with various metal salts were prepared and their separation performances were investigated. Among these coordinated ILs, NMP-0.1Fe(NO 3 ) 3 ·9H 2 O showed high selectivity and was used to separate toluene from n -heptane or cyclohexane. Fourier-transform infrared spectroscopy was used to verify that the synthesis of NMP-0.1Fe(NO 3 ) 3 ·9H 2 O was achieved. The toluene distribution coefficient and selectivity were 0.20 and greater than 70, respectively, for a 10 mol% toluene/ n -heptane system, and 0.20 and 23.5, respectively, for a 20 mol% toluene/cyclohexane system. Changing the extraction temperature had little effect on the separation performance. The effects of the solvent dosage, initial concentrations of system components, and regeneration times were also investigated. Experimental liquid–liquid equilibrium data for the studied ternary systems were correlated with the non-random two-liquid model. The results show that NMP-0.1Fe(NO 3 ) 3 ·9H 2 O has potential industrial applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Tiantian Fu,Lingtao Sun,Guijun Li,Yang Xiang,Yibo Tang,Jingqi Sha,Ying Lei,Zhongping Xiong,Yujun Si,Chaozhong Guo
A nitrogen and sulfur codoped carbon-based catalyst (Fe-NS-AG-C) to oxygen reduction reaction (ORR) is prepared by pyrolyzing a precursor from iron chloride, thiourea, anhydrous glucose and carbon black. Glucose is transformed to carbon sheets with defect-rich structures which are highly active to the anchoring of nitrogen and sulfur atoms. Correspondingly, the 3.35 at% and 0.63 at% contents of nitrogen and sulfur in Fe-NS-AG-C are heavily higher than the 0.71 at% and 0.26 at% in the controlled catalyst Fe-NS-C (without glucose). The edge-oriented pyridinic N is easily formed as ORR active sites with the C-S structure. A dual mesopore-dominated microstructure is also constructed by the carbon sheets to favor the mass transfer in the reaction process. As a result, the Fe-NS-AG-C presents outstanding ORR performance with more positive half wave potential, greater limiting current density, and better methanol tolerance than the benchmark Pt/C catalyst. The Zn-air battery assembled with Fe-NS-AG-C outputs 1.48 V of open circuit voltage, 156 mW cm −2 of maximum power density, and 1.26 V of work voltage, 785 mAh g −1 Zn of specific capacity and 983 mWh g −1 Zn of specific energy density at 10 mA cm −2 of discharge current density.
✓ 已验证
DOI
高影响因子
Food Science and Human Wellness
·
2022
·
IF 8.022
Cheng Li,Yang Tian,Jianli Han,Yu Lu,Meiyi Zou,Yue Jia,Chengjian Wang,Linjuan Huang,Zhongfu Wang
β -Conglycinin is one of the major allergens existed in soybean. N -Glycans attached to the β -conglycinin influenced the immunoreactivity and antigen presenting efficiency of β -conglycinin. In this study, we described a new method used to release and collect the N -glycans from β -conglycinin, and the N -glycans existed in linear epitopes of β -conglycinin were identified. Glycopeptides hydrolyzed from β -conglycinin were purified by cotton hydrophilic chromatography. Trifluoromethylsulfonic acid was then used to release glycans from glycopeptides, and new glycopeptides containing one single N -acetyl- D -glucosamine (GlcNAc) moiety were then utilized for mass spectrometry. Five glycosylation sites (Asn-199, Asn-455, Asn-215, Asn-489 and Asn-326) and 22 kinds of glycopeptides were identified. It is noteworthy that the peptide VVN # ATSNL (where # represents for the glycosylation site) was analyzed to be both glycopeptide and linear epitope. Our results provided a new method for the N -glycoform analysis of food allergens, and laid a foundation for understanding the relationship between glycosylation and food allergy.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 12
·6654-6662
·
IF 2.047
Yao Weilin,Cai Chen,Xiang Jiayuan,He Linxuan,Shi Juntao,Chang Xinhao,Ruan Lingfeng,Chen Zihang,Yao Zhujun
The exploration of high-capacity anode materials is extremely vital for the progress of lithium-ion batteries (LIBs). SnSe 2 is of great interest, on account of its low cost and high theoretical specific capacity, when used as the anode of LIBs. SnSe 2 exhibits drastic capacity decay at high rates, due to its inherent low electrical conductivity, as well as its sluggish kinetics and huge volume expansion during charging and discharging. In this work, flexible Sn-based nanofibers were synthesized by electrostatic spinning, followed by high-temperature calcination and selenization to obtain the final SnSe 2 @NCNFs. The SnSe 2 nanoparticles were encapsuled in carbon nanofibers with good ductility after annealing at 600°C. The carbon nanofibers not only act as self-supporting substrates but also improve the conductivity of the composite and retard volume expansion of SnSe 2 . With the above advantages, the integrated SnSe 2 @NCNFs is able to provide good stability, with 144.3 mA h g −1 at 0.5 A g −1 after 1000 cycles. Graphical Abstract
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Xinlei Ding,Yun Chen,Junping Nan,Hengwei Dai,Yuling Wang,Guangmei Bai,Wenge Qiu
N-doped nestlike carbon nanosheets (NCNs-Nx) were prepared successfully by a two-step strategy, namely, the in situ self-assembly hydrothermal synthesis using glucose as the carbon source in the presence of magnesium nitrate and sodium carbonate and the controlled nitrogen doping carbonization using urea as the nitrogen source. The performance of the corresponding Pd/NCNs-Nx catalysts was investigated for the selective hydrogenation of quinolines. The characterization of transmission electron microscopy, nitrogen sorption isotherm measurement, powder X-ray diffraction, X-ray photoelectron spectra, temperature-programmed desorption of pyridine and benzene, and the pyridine adsorption experiments showed that the very high catalytic activities and selectivity of the Pd/NCNs-Nx catalysts were related with the high Pd dispersion and the electronic structure of Pd species as well as the adsorption capacity and the adsorption type of quinoline molecule on the catalyst surface.
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 21
·3870
·
IF 5.719
Shuolin Zhou,Lu Wu,Junzhuo Bai,Min Lei,Min Long,Keying Huang
Levulinic esters, synthesized by the esterification of biomass-derived levulinic acid with various alcohols, is an important chemical that plays an essential role in the fields of biomass fuel additives, organic synthesis, and high value-added products. In the present work, the catalytic esterification of levulinic acid with n-butyl alcohol was selected as a typical model reaction to investigate the catalytic performance of an inexpensive commercial catalyst, titanium oxide nanoparticles. The influences of reaction time, reaction temperature, and catalyst loading on the conversion of levulinic acid to n-butyl levulinate were systematically examined through single-factor experiments. Additionally, the optimization of the reaction conditions was further investigated by a Box–Behnken design in response to the surface methodology. The desired product, n-butyl levulinate, with a good yield (77.6%) was achieved under the optimal conditions (reaction time of 8 h, reaction temperature of 120 °C, and catalyst dosage of 8.6 wt.%) when using titanium oxide nanoparticles as catalysts. Furthermore, it was found that addition of water to the catalytic system facilitated the reaction process, to some extent. This study reveals that the nanosized TiO2material,as an efficient solid acid catalyst, had good catalytic performance and stability for the esterification of levulinic acid after six consecutive uses.Keywords:TiO2nanoparticles;solid acid catalyst;n-butyl levulinate;esterification;response surface methodology
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 36
·17358-17366
·
IF 3.925
Xudong Zheng,Ang Li,Jie Hua,Yuzhe Zhang,Jian Rong,Jinfeng Mei,Man Zhou,Zhongyu Li
The vigorous development of rare earth elements has become particularly important for the recycling and reuse of rare earth waste solutions. We use the specific coordination of the phosphate group and La3+ to recover and separate La3+ from secondary resources. First of all, cellulose nanocrystals should be phosphorylated by using phosphoric acid in an aqueous medium. Phosphoric acid groups are introduced to the surface of the cellulose nanocrystal, and then poly-N-isopropylacrylamide is introduced for modification. The purpose is to increase the mechanical properties of the material. The material was characterized by scanning electron microscope, transmission electron microscope, Fourier infrared spectroscopy, N2 adsorption–desorption analysis, and thermogravimetric and static adsorption experiments. The results of the static adsorption experiments show that the maximum adsorption capacity is 92.28 mg g−1 when the pH is 7.0. After recycling the material five times, the material could still have 87.24% of the maximum adsorption capacity.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Qi Xia,Jinlong Hu,Qingqing Chen,Lingzhi Zhang
Se as an active material attracts tremendous attention because of its high volumetric capacity and better conductivity than S for rechargeable batteries. Herein, a carbon nanofiber membrane (PM-CNF) is designed and prepared as free-standing Se host by electrospinning the solution of polyacrylonitrile (PAN) and poly(styrenesulfonic acid)-melamine salt, followed by carbonization and activation process. PM-CNF shows super flexibility and high N-doping level of 8.92 % (pyrrolic-N: 2.15 % and pyridinic-N: 3.07 %), which is beneficial for ions diffusion and electrons transformation. The free-standing PM-CNF/Se cathode delivers a high reversible capacity of 570 mAh g −1 at 0.5 C, superior rate capacity of 375 mAh g −1 at 8 C, and stabile cycling over 1800 cycles. The excellent electrochemical performance can be ascribed to high Li-ion diffusion coefficient (2.99 × 10 −9 cm 2 s −1 ) and capacitance-contributed ratio (77.1 % at 0.1 mV s −1 ). The analysis of the charge/discharge process reveals that no polyselenide intermediates are observed during the first cycling process and thus the inhibited shuttle effect of polyselenides over cycling, which primarily contributes to the long cycling stability.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Zhichao Li,Xinyu Liu,Xuyun Wang,Hui Wang,Jianwei Ren,Rongfang Wang
Despite the existing advances of Ti 3 C 2 T x MXene as supercapacitor electrode material, its capacitance can be further enhanced through the composite strategy. In this work, the nitrogen-doped superhydrophilic carbon cloth (ENCC) was firstly prepared by N-doping of carbon cloth (CC), and then Ti 3 C 2 T x MXene nanosheets were electrophoretically deposited to yield the binder-free Ti 3 C 2 T x(EPD) /ENCC as supercapacitor electrode material. As a result, the composite electrode exhibited an area-specific capacitance of 2080.1 mF·cm −2 at 1 mA·cm −2 current density. The analysis implied that the varying Ti valence states provided certain psedocapacitance to the capacitance of the as-prepared electrode, though the main contribution was still dominantly from the electric double layer capacitance (EDLC). Further, the assembled symmetric supercapacitor yielded a wide voltage window of 1.8 V, and a good cyclic stability with 91% capacitance retention after 10,000 charge/discharge cycles at 20 mA·cm −2 . Overall, the employed composite strategy enabled the good dispersion of the MXene flakes on the surface of the flexible substrate . Meanwhile, the large number of functional groups (-OH, -F, etc.) on the surface of Ti 3 C 2 T x MXene interacted with the carbon layer through hydrogen bonding effects, which endows it as an ideal electrode for electrochemical capacitors .
✓ 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）