JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Yan Ma,Peng Zeng,Yan Ma,Xiaomei Yang
Supercapacitors have been extensively studied for their excellent power density and cycle life, but they are limited by low energy density. This study successfully prepared nitrogen/oxygen/boron (N/O/B) co-doped phenolic resin-based porous carbon materials (NBC) through a sol-gel method combined with high-temperature carbonization and activation processes, and systematically investigated their electrochemical performance in supercapacitors. By adjusting the amount of boric acid and the carbonization temperature, the pore structure and heteroatom doping levels of the materials were optimized. Experimental results demonstrate that when the carbonization temperature is 700 °C and the mass ratio of L-tyrosine to boric acid is 1:1, the obtained sample NBC-700-1 exhibits a high specific surface area (1721 m 2 g −1 ), an abundant micro/mesoporous hierarchical structure, and uniform N/O/B doping (N content: 8.31 at.%, O content: 14.11 at.%, B content: 0.55 at.%). In a three-electrode system, NBC-700-1 (377 F g −1 ) exhibits superior specific capacitance, high rate performance (73% capacitance retention at 20 A g −1 ), and long cycle stability at 0.5 A g −1 in 6 M KOH electrolyte compared to NBC-600-1 (300 F g −1 ), NBC-700-0.5 (290 F g −1 ), NBC-700-2 (268 F g −1 ), and NBC-800-1 (351 F g −1 ). Furthermore, a symmetric supercapacitor assembled with Na 2 SO 4 gel electrolyte achieves an energy density of 29.9 Wh kg −1 at a power density of 550 W kg −1 , along with broad temperature adaptability (−25 to 75 °C) and remarkable flexibility (no significant performance degradation after 180° bending). Additionally, the design of a PVA-based gel electrolyte with wide pH applicability provides new insights for the application of such devices in complex environments.
研究领域:
储能
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材料科学
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电化学
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纳米技术
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高分子科学
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产品关联
DOI
高影响因子
ChemSusChem
·
2025
·
IF 6.6
Bing Yang,Mingxu Sun,Peng Li,Kaichao Yin,Mengjia Wang,Bo Li,Jing Chen,Xuzhuo Sun,Yunfeng Tian,Kaisheng Xia,Bo Chi
Graphical This study optimizes Sm 0.5 Sr 0.5 CoO 3-δ cathodes by tuning B-site cobalt content (x = 1.0–1.3). Sm = Sr 0.5 CoO 3-δ exhibits superior electronic conductivity, oxygen reduction activity, and stability. At 550°C, its polarization resistance is 0.517 Ω cm 2 . A single cell achieves 1.054 W cm -2 peak power density at 700°C (25% higher), confirming B-site stoichiometry modulation as an effective strategy for enhanced performance. High-performance solid oxide fuel cells (SOFCs) operating at intermediate to low temperatures require cathode materials with enhanced activity and stability. This study investigates the effect of excess B-site cations on the electrochemical performance of Sm 0.5 Sr 0.5 CoO 3-δ (SSC) electrodes. A series of Sm 0.5 Sr 0.5 Co 1+x O 3-δ (SSC1 + x, X = 0, 0.05, 0.1, 0.15, and 0.3) perovskite cathodes with varying Co excess are synthesized to investigate their effect on electrical conductivity, oxygen vacancy formation, and overall cathode properties. The Sm 0.5 Sr 0.5 Co 1.1 O 3-δ (SSC1.1) composition demonstrates a polarization resistance of 0.517 Ω cm 2 at 550 °C, outperforming the standard SSC cathode (0.711 Ω cm 2 ). Moreover, single cells with SSC1.1 cathodes achieve a peak power density of 1.054 W cm −2 at 700 °C, marking a 25% improvement over standard SSC cathodes (0.842 W cm −2 ). These results highlight the potential of SSC1.1 as an advanced cathode material for enhancing SOFC performance at reduced temperatures.
研究领域:
能源材料
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电化学
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燃料电池
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材料科学
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固态器件
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xiaocong Liu,Yi Wang,Fuping Zhang,Bo Xing,Guo Yang,Kaibin Zhang,Xingyong Liu,Yan Huang,Min Li,Mingliang Wu
Widespread and ineffective dye treatment in aquatic environment leads to serious pollution problems, threatening ecology and human health. Herein, manganese cerium bimetallic oxide cathode material (MnCeO x @GF) was prepared by hydrothermal method combined with calcination, and the electrochemical Fenton degradation performance of a typical dye Rhodamine B (Rh B) was investigated. The results show that the degradation of Rh B by MnCeO x @GF can reach 96.5 % within 2 h in acidic environment and continue to perform effectively after 4 repeated experiments. Combined with SEM and electrochemical test results, it can be seen that the bimetallic composite oxides formed by manganese and cerium on the surface of the support can effectively enhance the catalytic activity of the material, the addition of cerium changes the morphology of manganese oxides and promotes the generation of multiple valence composite oxides of transition metals, and improves the degradation of Rh B. Based on the free radical masking experiments, hydroxyl radical (·OH) is the main active substance in the electro-Fenton degradation process. This work not only provides a way to design and manufacture cathode materials for in situ electrosynthesis of H 2 O 2 , but also provides an important reference for improving the reusability of cathodes for sustainable dye wastewater treatment.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 51
·45864-45872
·
IF 3.289
Yafei Wang,Jiang Fan,Tianyi Li,Qiong Wang,Junwei Shi,Zuoming Qu,Hua Tan,Yu Liu,Weiguo Zhu
Two binuclear platinum metallomesogens possessing a 6,12-dihydro-indeno[1,2-b]fluorene bridge, FJ-1 and FJ-2, have been synthesised and characterised by 1H and 13C NMR, TOF-MS and elemental analysis. Their thermal properties were studied by polarised optical microscopy and differential scanning calorimetry. Upon photoexcitation in solution, both complexes exhibited dual fluorescence (1π–π*)/phosphorescence (3π–π*) emission covering most of the visible spectrum (from about 460 nm to 750 nm). This uncommon behaviour has been further investigated by time-resolved optical spectroscopy, including nanosecond time-resolved transient absorption spectroscopy, and further insights were obtained by means of density functional theory (DFT) and time-dependent DFT (TD-DFT). An organic light-emitting diode (OLED) using FJ-1 was prepared. Importantly the two emission bands are retained in electroluminescence. This result suggests that controlling spin–orbit coupling to obtain dual emission can provide an effective way of achieving broadband emission based on a single molecule.
研究领域:
化学
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材料科学
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光物理学
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DOI
高影响因子
American Journal of Cancer Research
·
2023
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IF 5.3
Qi-Tang Huang,Quan-Quan Hu,Zhao-Feng Wen,Yan-Li Li
Since the approval by the Food and Drug Administration (FDA), ferumoxytol and other iron oxide nanoparticles (IONs) have been widely used as iron supplements for patients with iron deficiency. Meanwhile, IONs have also been used as contrast agents in magnetic resonance imaging and as drug carriers. Importantly, IONs have demonstrated a significant inhibitory effect on the growth of tumors, including hematopoietic and lymphoid tumors, such as leukemia. In this study, we further demonstrated the effect of IONs on inhibiting the growth of diffuse large B-cell lymphoma (DLBCL) cells by enhancing ferroptosis-mediated cell death. IONs treatment caused an accumulation of intracellular ferrous iron and the onset of lipid peroxidation in DLBCL cells as well as the suppressed expression of anti-ferroptosis protein Glutathione Peroxidase 4 (GPX4), thereby leading to increased ferroptosis. Mechanistically, IONs increased cellular lipid peroxidation through the generation of ROS via the Fenton reaction and regulating the iron metabolism-related proteins, such as ferroportin (FPN) and transferrin receptor (TFR), which elevated the intracellular labile iron pool (LIP). Hence, our findings suggest the potential therapeutic effect of IONs on the treatment of patients with DLBCL.
研究领域:
肿瘤学
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纳米医学
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血液学
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癌症生物学
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产品关联
DOI
PubMed
高影响因子
CATALYSIS LETTERS
·
2022
·Vol. 152
·期 12
·3594-3606
·
IF 2.936
Yao Haoyang,Xu Yunlan,Zhong Dengjie,Zeng Yundong,Zhong Nianbing
In order to inhibit rapid recombination of electron–hole pairs of photoanode and expand its light response wavelength, PPy-14%/WO 3 /TiO 2 /Ti photoanode was prepared. The maximum photocurrent density is 2.31 mA·cm −2 , which is 1.76 times higher than that of WO 3 /TiO 2 /Ti at 1.1 V (vs. SCE). The maximum power density, phontocurrent density and Rhodamine B degradation rate of photocatalytic fuel cell (PFC) with PPy-14%/WO 3 /TiO 2 /Ti photoanode and Cu cathode are 25.48 μW·cm −2 , 0.25 mA·cm −2 and 88.5%, respectively. The excellent performance is mainly due to the good carrier migration rate of PPy and the synergistic effect of PPy/WO 3 /TiO 2 /Ti ternary hybrid electrode, so that photogenerated electrons and holes can accumulate in the conduction band of WO 3 and HOMO of PPy, respectively. This not only expands the light absorption range and enhances the light absorption intensity, but also improves the separation of electron–hole pairs, and finally significantly enhances the Rhodamine B degradation and electricity generation performance of PFC. Graphical Abstract In order to inhibit rapid recombination of electron–hole pairs of photoanode and expand its light response wavelength, PPy-14%/WO 3 /TiO 2 /Ti photoanode was prepared. The excellent performance is mainly due to the good carrier migration rate of PPy and the synergistic effect of PPy/WO 3 /TiO 2 /Ti ternary hybrid electrode, so that photogenerated electrons and holes can accumulate in the conduction band of WO 3 and HOMO of PPy, respectively.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ARCHIV DER PHARMAZIE
·
2022
·Vol. 355
·期 7
·2100465
·
IF 4.613
Yating Guo,Xiaoding Jiang,Qi Chang,Zhihong Xiao,Zhuo Chen,Dejian Jiang,Gaoyun Hu,Qianbin Li
A series of novel pyrazolo[3,4- b ]pyridine derivatives were designed, synthesized, and biologically evaluated for anti-lung cancer activity. Structure–activity relationship and AutoGPA models were constructed based on the in vitro antiproliferative potency of the compounds against a human lung adenocarcinoma cell line (A549). Compound 9d exhibits improved potency for A549 cell growth inhibition (3.06 ± 0.05 μM) compared with A-769662 (45.29 ± 2.14 μM). Compound 9d can elevate the phosphorylation levels of adenosine monophosphate-activated protein kinase (AMPK) and its substrate acetyl-CoA carboxylase and reduce the level of phosphorylated ribosomal S6 kinase (p-70S6K) at 1 μM, which is comparable to the activity of A-769662 at 20 μM. 9d induced G2/M cell cycle arrest, which was rescued when co-incubated with “Compound C,” a potent AMPK inhibitor. Taken together, compound 9d showed potential anti-lung cancer activity via inducing cell cycle arrest by regulation of the AMPK/70S6K pathway in A549 cells, which could provide a new lead for the discovery of anti-lung cancer agents.
研究领域:
药物化学
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癌症研究
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药理学
✓ 已验证
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Yu Zhang,Ying Huang,Junhong Jiang,Jianbo Chen,Weixing Han,Yuxian Liu,Linjun Kong,Jian Gong,Minhua Su,Diyun Chen
Mg and N co-doped carbon quantum dots (Mg-N-CQDs) were synthesized and applied to alleviate oxygen toxicity by UV-B radiation and enhance antioxidative responses to wheat seedlings. It showed that Mg-N-CQDs pre-treatment attenuated the UV-B stress effects in a dose-dependent manner, as indicated by enhancing the characteristics of seed germination and early seedling growth parameters. Meanwhile, Mg-N-CQDs can be applied in plant nutrient solutions with nitrogen, phosphorus, potassium, and other fertilizers to promote the growth of seedlings. Furthermore, efficient antioxidant systems, chlorophyll content, and stability of fluorescence intensity were activated by Mg-N-CQDs pre-treatment, which effectively increased the activities of superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD), and eliminate the contents of malondialdehyde (MDA) and hydrogen peroxide, and the production rate of superoxide anion radical in the roots and germs, thereby preventing oxidative damage from UV-B stress. Notably, Mg-N-CQDs pre-treatment significantly increased the expression of related genes to improve the antioxidant capacity of roots and germs, resulting in an increased level of ATPS, CS, and GS. The mechanism study indicated that amino and hydroxyl groups and Mg, N modified CQDs could broaden the light absorption range of CQDs and improve the ability to convert blue light and ultraviolet rays to visible light, which was the main reason why Mg-N-CQDs could relieve wheat seedlings from ultraviolet stress. Therefore, Mg-N-CQDs could serve as a regulator to reduce the damage of UV-B, laying the foundation for their application in environmental protection and agricultural production.
研究领域:
植物学
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环境科学
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农业科学
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DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 10
·3501-3511
·
IF 3.348
Chengying Yang,Honghong Li,Zeyu Wu,Xusheng Huang,An Zhou,Ailing Hui,Rui Liu,Wencheng Zhang
In this article, novel molecularly imprinted polymers based on 3D reduced graphene oxide aerogel (3D RGO-GBMIPs) were successfully fabricated and applied as adsorbents for dispersed solid-phase extraction (DSPE) of ginkgolide B (GB). After being prepared by surface molecular imprinted technology, 3D RGO-GBMIPs were successively characterized by fourier transform infrared spectroscopy, thermogravimetric analysis, Raman spectroscopy, and scanning electron microscope. The results of adsorption experiments revealed that 3D RGO-GBMIPs presented highly selective recognition properties and well reusability. The main variables influencing DSPE efficiency, including extraction solvent, 3D RGO-GBMIPs dosage, category, and volume of eluent, as well as elution time were investigated. The DSPE results showed that 3D RGO-GBMIPs had an obvious effect on the improvement of GB purity in ginkgo biloba extract, with a satisfactory recovery rate and yield. Therefore, 3D RGO-GBMIPs are expected to be applied for the enrichment of GB from complex matrices.
研究领域:
分析化学
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材料科学
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植物化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 22
·12459-12470
·
IF 2.936
Minghua Wang,Longyu Yang,Jinyun Yuan,Linghao He,Yingpan Song,Hongzhong Zhang,Zhihong Zhang,Shaoming Fang
A series of bismuth sulfide (Bi2S3) nanorods and amine-functionalized Ti-based metal–organic framework heterojunctions [denoted by Bi2S3@NH2-MIL-125(Ti)] were constructed and explored as bifunctional photocatalysts for Cr(VI) reduction and rhodamine B (RhB) degradation under visible light illumination. Compared with the individual NH2-MIL-125(Ti) and Bi2S3, the as-synthesized Bi2S3@NH2-MIL-125(Ti) photocatalyst exhibited an enhanced photocatalytic activity toward Cr(VI) and RhB owning to the synergetic effect between Bi2S3 and NH2-MIL-125(Ti). Moreover, the Bi2S3@NH2-MIL-125(Ti) heterojunctions showed increased Cr(VI) removal efficiency by adding RhB in the system. The photocatalytic mechanism was proposed based on the analysis of different scavenger for active species and electron spin resonance spectrometry. The introduction of Bi2S3 into NH2-MIL-125(Ti) can extend the light adsorption and improve the transfer and separation of photogenerated charge carriers through the Bi2S3@NH2-MIL-125(Ti) heterojunction with unique band gap structure. The synthesized Bi2S3@NH2-MIL-125(Ti) photocatalyst also exhibited good reusability and stability.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 10
·1-12
·
IF 2.4
Ahmed Shehbaz,Feng Liping,Ban Ruotong,Chen Zhilin
Photocatalysis is a promising alternative to conventional wastewater treatment technologies. BiOBr materials have been extensively investigated for photocatalytic degradation of Rhodamine B (RhB), yet research on morphology regulation and corresponding catalytic performance remains insufficient. In this study, BiOBr with distinct morphologies, including nanoflowers, nanosheets, and nanocoral-like nanostructures, was successfully synthesized through pH adjustment during solvothermal synthesis under identical experimental conditions. This morphology regulation simultaneously modified the thickness of BiOBr nanomaterials. Experimental results demonstrate that BiOBr nanosheets synthesized under weakly acidic conditions exhibit superior light absorption range and charge carrier separation efficiency compared to nanoflower and nanocoral-like counterparts. The BiOBr nanosheets synthesized at pH 6, with a rate constant 0.04977 min⁻ 1 exhibit excellent photocatalytic activity in the degradation of rhodamine B dye under visible light, higher than BiOBr nanoflowers and coral-like structures. This work provides fundamental insights into morphology-dependent photocatalytic mechanisms and proposes a practical strategy for developing efficient BiOBr-based photocatalytic degradation materials. Graphical Photocatalytic mechanism of BiOBr nanoflowers under sunlight, showing charge separation, redox potentials, and pollutant degradation.
研究领域:
材料科学
·
环境化学
·
光催化
·
纳米技术
·
废水处理
✓ 已验证
产品关联
DOI
高影响因子
Food Analytical Methods
·
2020
·Vol. 13
·期 6
·1255-1261
·
IF 2.667
Wu Zhengzong,He Deyun,Cui Bo,Jin Zhengyu,Xu Enbo
Reliable and sensitive detection of Staphylococcal enterotoxin B (SEB) is important to prevent potential human health risk from foods contaminated by SEB. Here, a triple-channel assay was developed for ultrasensitive detection of SEB. Based on the optical characteristics of tetramers composed of gold nanoparticles (AuNPs) and upconversion nanoparticles (UCNPs), the SEB amounts in food products can be simultaneously detected by using surface-enhanced Raman scattering (SERS), fluorometry, and circular dichroism (CD). Under SERS mode, fluorescence mode, and CD mode, wide linear detection ranges (1–750 pg/mL, 1–750 pg/mL, and 2–500 pg·mL −1 ) were achieved. Furthermore, the practicality of the novel assay was evaluated by determining SEB contents in spiked milk samples. These results indicate that the triple-mode aptasensor is a potential useful tool in quantitative detection of SEB in foods.
研究领域:
食品科学
·
分析化学
·
纳米技术
·
毒理学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）