CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wei Wang,Jianguo Si,Liguo Yue,Weicai Zhang,Qingqing Chen,Haoliang Huang,Fei Lin,Yang Zhao,Sheng Meng,Lifeng Liu
The shuttle effect and sluggish redox kinetics of lithium polysulfides (LiPSs) are generally regarded as main obstacles to practical applications of the promising high energy density lithium-sulfur batteries (LSBs). Using electrocatalysts to expedite LiPSs conversion during charge/discharge has recently become an effective approach to improving LSB performance, but developing highly efficient catalysts active for bidirectional LiPSs conversion both involving multiple electron transfer steps remains a great challenge. Herein, we report the synthesis of a new composite electrocatalyst consisting of bimetallic nickel/cobalt metal–organic frameworks (Ni/Co-MOF) anchored on highly dispersed amino-modified MXene (Ti 3 C 2 -NH 2 , i.e., TCN) supports through a simple one-step hydrothermal method. Density functional theory (DFT) calculations demonstrate that incorporating both Ni and Co species into MOF results in significant electronic coupling effect, making the d-band centers of Ni and Co sites in Ni/Co-MOF@TCN become comparable and the composite catalyst shows similar adsorption and dissociation capability toward LiPSs. Such a synergy between Ni and Co sites has been validated by comprehensive experimental characterization, which confirms that Ni/Co-MOF@TCN has moderate binding strength for LiPSs adsorption/dissociation, so that both Ni and Co can effectively boost the kinetics and thermodynamics of the bidirectional conversion of LiPSs. Consequently, LSBs containing Ni/Co-MOF@TCN as sulfur hosts exhibit a high specific capacity of 1465 mAh g −1 at 0.1 C and excellent stability at 1 C for 600 cycles with a low decay rate of 0.052 % per cycle. Even with a high sulfur loading of 6.8 mg cm −2 and a low electrolyte/sulfur (E/S) ratio of only 5 μL mg −1 , the Ni/Co-MOF@TCN-containing LSBs can still deliver an initial areal capacity of 6.81 mAh cm −2 at 0.1 C. Moreover, Ni/Co-MOF@TCN also shows outstanding performance in single-layer Li-S pouch cells.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Xiang Li,Guiyang Yu,Ruihong Sun,Ke Gong,Jinghao Zhu,Debao Wang
Directional and smooth transfer of charges across the interface is pivotal for heterojunction materials in terms of photochemical activity. However, large lattice mismatch and disordered interface inevitably exist in actual-prepared heterojunctions and bring great uncertainty in interfacial charge migration. Herein, an ingenious strategy with photoinduced metastable-charging d-orbital electrons of Re centers at the interface of ReS2/ZnIn2S4 (ReS2/ZIS) is clarified. This metastable interfacial electronic state is involved in creation of gradient charge migration channels. The charging process raises the occupancy of electron density, which provides large difference of electronic potential for the subsequent charge migration to ReS2. This gradient charge migration significantly accelerates the mobility and the electron injection rate at the interface, which achieves the 6.2-fold and 7.7-fold improvement. Consequently, the optimized 10% ReS2/ZIS composite exhibits the conversion rate for photocatalytic oxidation amine of 22.84 mmol·gcat−1 ·h−1, which is the highest efficiency achieved so far for photocatalytic amines oxidation coupling upon ReS2-based composites. This research furnishes original insights for charging orbital electrons to steer kinetics process of charge transfer and shed light on the design of advanced heterojunction materials for efficient solar energy conversion.
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高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 3.7
Feiyu Gao,Pengyu Sun,Shiao Du,Youcai Jin,Jimin Xue,Wei Chen
Wood, as a widely available renewable resource, was extensively used in many fields. Utilizing its abundant hydroxyl groups of surface and unique hierarchical pore structure, N -methyl-D-glucosamine (NMDG), a functional monomer with unique chelation properties towards boric acid/borate, was grafted onto its surface after modification, successfully preparing the NMDG-modified wood-based functional material (Wood-NMDG). When this material was applied for boron adsorption in aqueous, research found that both solution pH and boron concentration significantly affected its adsorption performance. Studies on its adsorption kinetics, adsorption isotherms and thermodynamics revealed that the material possessed excellent adsorption capacity and rapid adsorption kinetics. After adsorption with salt lake brine, it demonstrated outstanding specificity and selectivity. Dynamic adsorption studies using simulated seawater yielded a breakthrough time of 42 hours. Based on the World Health Organization standard for boron concentration in drinking water, its capacity for treating seawater into drinking water reached 2520 L·kg –1 . However, cycling experiments indicated a certain degree of decrease in the adsorption properties of the material. Nevertheless, considering the abundant availability, low cost, and ease of modification of wood as a raw material, Wood-NMDG held broad application prospects as an efficient removal agent for seawater desalination, drinking water production and irrigation water treatment.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Huanlin Li,Wei Shi,Yusong Zhang
Terahertz time-domain spectroscopy (THz-TDS) technology offers unique advantages for biomedical applications and non-destructive testing. Unlike X-rays, THz technology does not damage the materials being tested, especially active substances. However, traditional THz-TDS techniques still struggle to distinguish between chiral substances. This study presents a terahertz polarization time-domain spectroscopy system (THz-PTDS) that utilizes a 2 × 2 GaAs photoconductive array to detect the polarization of terahertz waves. This system enables the non-destructive and rapid identification of chiral forms of malic acid and its diethyl ester enantiomers. The results indicated that the polarization parameter curves for both solid and solution forms of malic acid showed significant chiral differences at frequency of 0.6 THz. Moreover, the polarization parameter curve of a malic acid diethyl ester-ethanol solution displayed significant chiral differences at 0.93 THz, while the pure malic acid diethyl ester showed significant chiral differences at 1.013 THz. Furthermore, the rotation direction of the polarization ellipse at the corresponding THz frequencies can be used to distinguish between enantiomers. This method provides an innovative approach for the rapid identification of chiral enantiomers in food and pharmaceuticals, with significant application prospects and potential benefits.
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DOI
PubMed
高影响因子
TALANTA
·
2013
·
IF 3.498
Zhiwei Sun,Xiaoxiang Wang,Yiping Cai,Junqing Fu,Jinmao You
A new pair of derivatization reagents, d 0 -4-(1-methyl-1 H -phenanthro[9,10- d ]imidazol-2-yl)phenlamine (d 0 -MPIA) and d 3 -4-(1-methyl-1 H -phenanthro[9,10- d ]imidazol-2-yl)phenlamine (d 3 -MPIA) have been designed and synthesized. It was successfully used to label aliphatic aldehydes and the aldehyde derivatives were analyzed by high-performance liquid chromatography–tandem mass spectrometry (HPLC–MS/MS). The new isotope-coded reagents could easily label aldehydes under acidic conditions in the presence of NaCNBH 3 . The target derivatives exhibited intense [M+H] + and regular product ions with electrospray ionization source in positive mode. The d 0 /d 3 -MPIA-aldehydes were monitored by the transitions of [M+H] + → m/z 322 and [M+H] + → m/z 165, and the obtained detection limits were in the range of 0.18–15.9 pg/mL at signal to noise ratio of 3. The global isotope internal standard technology was employed for quantification analysis with d 3 -MPIA-aldehyde as internal standard for corresponding d 0 -MPIA-aldehyde. Excellent linear responses for relative quantification were observed in the range of 1/10–10/1 with coefficients >0.998. The developed method has been applied to the quantification of aliphatic aldehydes in selected aquatic products with RSD<3.6% and recoveries >85.2%.
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PubMed
高影响因子
Small
·
2024
·Vol. 20
·期 40
·2402725
·
IF 13
Mengyu Liu,Ruohan Hou,Pengpeng Zhang,Yukun Li,Guosheng Shao,Peng Zhang
Unveiling the inherent link between polysulfide adsorption and catalytic activity is key to achieving optimal performance in Lithium-sulfur (Li-S) batteries. Current research on the sulfur reaction process mainly relies on the strong adsorption of catalysts to confine lithium polysulfides (LiPSs) to the cathode side, effectively suppressing the shuttle effect of polysulfides. However, is strong adsorption always correlated with high catalysis? The inherent relationship between adsorption and catalytic activity remains unclear, limiting the in-depth exploration and rational design of catalysts. Herein, the correlation between “d-band center-adsorption strength-catalytic activity” in porous carbon nanofiber catalysts embedded with different transition metals (M-PCNF-3, M = Fe, Co, Ni, Cu) is systematically investigated, combining the d-band center theory and the Sabatier principle. Theoretical calculations and experimental analysis results indicate that Co-PCNF-3 electrocatalyst with appropriate d-band center positions exhibits moderate adsorption capability and the highest catalytic conversion activity for LiPSs, validating the Sabatier relationship in Li-S battery electrocatalysts. These findings provide indispensable guidelines for the rational design of more durable cathode catalysts for Li-S batteries.
研究领域:
电化学
·
材料科学
·
能源化学
·
纳米催化
·
电池技术
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DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Yongtao Zhang,Fulin Chen,Yan He,Fei Wang
CO 2 sequestration based on hydrate technology is considered to be the most promising long-term CO 2 sequestration technology. In this study, a method of using initial stirring to activate CO 2 hydrate formation process was proposed in the aim of saving energy and avoiding the problem of stirring shaft stuck, where the stirring only played a role in activating hydrate formation process. Two amino acids, l -Methionine and d -leucine, were chosen as promoters for improving the formation kinetics of CO 2 hydrates, and l -Methionine presents better than d -leucine. When the concentration of l -methionine solution is equal to or greater than 4 mmol/L, even with the initial stirring of 10 rpm within 8 min, T 90 can be shortened to close to or less than 40 min with a high gas consumption of more than 7.3 mmol gas/mL water, where the promoting effect is similar to the condition of continuous stirring of about 100 min, indicating that about 90 % of the energy consumed for mechanical stirring can be saved. Moreover, an interesting phenomenon was observed that CO 2 hydrates firstly nucleated inside the l -methionine solution, and a large number of small hydrate floccules rapidly formed and filled the entire solution under the action of magnetic stirring, which proved the instantaneous excitation effect of stirring on hydrate formation. This work contributes to rethinking the promoting roles of stirring and promoters in CO 2 hydrate formation.
研究领域:
环境科学
·
能源化学
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物理化学
·
气体水合物
·
碳捕集与封存
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DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Zhixiang Cai,Hongbin Zhang
The chain conformational change in curdlan during carboxymethylation was investigated using nuclear magnetic resonance (NMR), circular dichroism (CD) spectroscopy, and atomic force microscopy (AFM). The distributions of carboxymethyl substituents within anhydroglucose unit (AGU) of CMCD were found to follow the order of OH (6) > OH (4) > OH (2) for CMCD with a low DS and OH (6) > OH (2) > OH (4) for CMCD with relatively high DS. The increased carboxymethylation level induced the chain conformation transition of curdlan from triple helix to random coil in water. The DS of 0.25 was the critical value of chain conformation transition, below which CMCD chains were triple helices. For DS larger than 0.25, CMCD existed in the state of random coils. The intermolecular hydrogen bonding between C2 hydroxyls in AGU sustained the triple helical conformation and stiffness of the polymer chain, which weakened with the increase in DS.
研究领域:
生物化学
·
高分子科学
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL NEUROANATOMY
·
2020
·
IF 2.353
Hongqing Liu,Shiqi Li,Cuizhu Yang,Hui Jia,Ziting Gu,Xing Tu,Sumin Tian,Jing Liu,Guoying Li,Yuxin Ma
The senile plaque formed by β-amyloid (Aβ) deposition in the brain is one of the main pathological features of Alzheimer’s disease (AD), and the c-Jun N-terminal kinase (JNK) signaling pathway plays an important role in the pathogenesis of AD. This study aimed to investigate that D-serine may ameliorate motor and cognitive impairment in Aβ injected mice by inhibiting JNK signaling pathway. Firstly, Kunming mice were injected intrahippocampally with Aβ 1-42 to build AD model. The mice were injected intraperitoneally with saline, D-serine, D-amino acid oxidase (DAAO), and Sodium benzoate (BE) for 10 consecutive days, respectively. Subsequently, the motor and cognitive functions of mice were detected by behavioral tests. The silver staining and immunohistochemical methods were used to detect the distributions of Aβ in the hippocampus of mice. 18 F-2-Fluro-D-deoxy-glucose positron emission tomography/computed tomography ( 18 F-FDG PET/CT) scans were performed to detected glucose metabolism of Aβ 1-42 induced lesions. The expressions of relative JNK factors were detected by immunohistochemistry and Western blot methods. These results showed that Aβ severely impaired the motor and memory abilities of mice. The expressions of glial fibrillary acidic protein (GFAP), tumor necrosis factor (TNF-α), N-methyl-D-aspartate receptor 1 (NMDAR1), phospho-JNK (p-JNK), p-c-Jun and activating transcription factor 2 (ATF2) increased significantly. After D-serine treatment, the abilities of movement and memory of mice were improved, and the clearance rate of Aβ was accelerated. The expressions of GFAP, TNF-α, NMDAR1, p-JNK, p-c-Jun and ATF2 decreased significantly. DAAO and BE were administered to further validate these results. Therefore, this study showed that D-serine could alleviate the cognitive impairment of Aβ 1-42 injected mice by inhibiting JNK signaling pathway. These results provide more evidences for the effect of D-serine on AD and relevant mechanism to treat AD.
研究领域:
神经科学
·
药理学
·
分子生物学
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DOI
PubMed
高影响因子
CURRENT PHARMACEUTICAL BIOTECHNOLOGY
·
2023
·Vol. 24
·期 14
·1803-1811
·
IF 2.8
Zou Min-Shu,Song Qiu-Ju,Yin Tai-Yong,Xu Hong-Tao,Nie Guo-Ming
Background: The etiology of systemic lupus erythematosus (SLE) is complex, and the disease is thus difficult to cure. In this regard, it has been established that SLE patients are characterized by differing levels of vitamin D-hydroxylation; however, the direct effects of vitamin D
(VitD) in these patients remain unknown. Objective: Therefore, we investigated the effects and mechanisms of action of VitD in the context of SLE. Methods: The effects of VitD on MRL/LPR mice were studied by synthesizing glycogen synthase kinase-3β (GSK-3β)-interfering lentiviruses
and transfecting with miR-126a-5p mimics. Changes in the body weight of mice were recorded for 6 weeks. Western blotting was performed to determine the levels of T-bet, GATA3, and GSK-3β protein expression, and qRT-PCR was performed to determine the levels of miR-126a-5p and GSK-3β
mRNA expression. ELISA was performed to determine the levels of ANA, dsDNA, and snRNP/Sm in mice serum. Results: GSK-3β and miR-126a-5p were expressed at high and low levels, respectively, in MRL/LPR mice. VitD (30 ng/kg) was found to reduce the expression of GSK-3β and increase
miR-126a-5p expression, which targets GSK-3β. T-bet and GATA3 were found to be positively regulated by miR-126a-5p and VitD and negatively regulated by GSK-3β. The body weight of mice was not altered by VitD. ANA, dsDNA, and snRNP/Sm were positively regulated by miR- 126a-5p and
VitD and negatively regulated by GSK-3β. The effects of GSK-3β were enhanced in response to the inhibition of miR-126a-5p expression. Conclusion: VitD upregulated miR-126a-5p to target GSK-3β expression, thereby alleviating the SLE in MRL/LPR mice.
研究领域:
免疫学
·
分子生物学
·
药理学
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DOI
PubMed
高影响因子
Molecular Medicine Reports
·
2019
·Vol. 20
·期 1
·332-340
·
IF 1.851
Lina Liu,Jing Yan,Fei Ge,Xiangtao Xu,Jun Lu,Huilian Shi,Shuihong Li,Yue Zhao,Changzheng Zhang
Saikosaponin‑D (SSD), which is the main bioactive component in the traditional Chinese medicine Chai Hu (Bupleurum falcatum L), possesses estrogen‑like properties and is widely used in treating estrogen‑related neurological disorders. The current study aimed to investigate the protective effects of SSD on the fear memory deficit in ovariectomized (OVX) rats and the potential underlying mechanism. SSD treatment significantly prolonged freezing time in OVX rats in a manner similar to that of estradiol (E2), whereas this effect was markedly suppressed by co‑administration of ICI182780, a non‑selective estrogen receptor (ER) inhibitor. The expression of ERα in the hippocampus of OVX rats was significantly elevated by SSD; however, Erβ expression and E2 synthesis were not markedly affected by SSD treatment. Collectively, this study demonstrated that SSD‑mediated fear memory improvement in OVX rats may be attributed not to E2 levels or ERβ activity, but to ERα activation in the hippocampus.
研究领域:
神经科学
·
药理学
·
传统中药
·
内分泌学
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DOI
PubMed
高影响因子
CELLULAR AND MOLECULAR NEUROBIOLOGY
·
2016
·Vol. 37
·期 5
·869-877
·
IF 2.328
Shen Hui,Wang Jie,Jiang Dan,Xu Pei,Zhu Xiaolu,Zhang Yuanyuan,Yu Xing,Won Moo-Ho,Su Pei Qing,Yan Bing Chun
Some anticonvulsant drugs are associated with cognitive ability in patients; Topiramate (TPM) is well known as an effective anticonvulsant agent applied in clinical settings. However, the effect of TPM on the cognitive function is rarely studied. In this study, we aimed to observe the effects of TPM on cell proliferation and neuronal differentiation in the dentate gyrus (DG) of the d -galactose-induced aging mice by Ki-67 and doublecortin (DCX) immunohistochemistry. The study is divided into four groups including control, d -galactose-treated group, 25 and 50 mg/kg TPM-treated plus d -galactose-treated groups. We found, 50 mg/kg (not 25 mg/kg) TPM treatment significantly increased the numbers of Ki-67 + cells and DCX immunoreactivity, and improved neuroblast injury induced by d -galactose treatment. In addition, we also found that decreased immunoreactivities and protein levels of antioxidants including superoxide dismutase and catalase induced by d -galactose treatment were significantly recovered by 50 mg/kg TPM treatment in the mice hippocampal DG ( P < 0.05). In conclusion, our present results indicate that TPM can ameliorate neuroblast damage and promote cell proliferation and neuroblast differentiation in the hippocampal DG via increasing SODs and catalase levels in the d -galactose mice.
研究领域:
神经科学
·
药理学
·
衰老研究
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DOI
PubMed
高影响因子
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