Materials Today Communications
·
2020
·
IF 2.678
Fang Lu,Yurong Ma,Huibo Wang,Mengling Zhang,Bo Wang,Yue Zhang,Hui Huang,Fan Liao,Yang Liu,Zhenhui Kang
Multidrug-resistant bacterial infections are one of the most serious public health threats in the world, which bring an urgent need to discover novel antibiotics with enhanced broad-spectrum antibacterial activity . Curcumin , as a widely used natural product , has good anti-inflammatory and antioxidant properties; while, the bioavailability, bioactivity and antibacterial activity design are limited by its poor water-solubility. Here, to improve the bioactivity of curcumin, we show the fabrication of highly water-solvable carbon dots (CDs) by hydrothermal method from citric acid and curcumin. The CDs possess excellent broad-spectrum antibacterial activity and antibiofilm activity because they can do damage to the bacterial walls when they get into the bacteria. The bactericidal efficiency of CDs (375 μg/mL) achieves up to 100 % for Gram-negative bacteria ( Escherichia coli and Pseudomonas aeruginosa ). Additionally, for Gram-positive bacteria ( Staphylococcus aureus and Bacillus subtilis ), the bactericidal efficiency reaches 80 %. In addition, these CDs also can completely inhibit the formation of biofilm for the Gram-negative bacteria and the Gram-positive bacteria. This work has a significant meaning in studying new antibacterial nanomaterials derived from natural product and the treatment of infections.
研究领域:
纳米医学
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微生物学
·
药剂学
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天然产物化学
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感染性疾病
·
生物材料
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 17
·7911-7920
·
IF 2.7
Pengchao Liang,Yuanchao Li,Xiangzhen Xiao,Shumin Fan,Jingjing Ma,Jingjie Liu,Yongqiang Dong,Yuhang Zong,Guangri Xu,Li Yang
Although they possess a high working voltage and environmental compatibility, and are low in cost with abundant resources, the poor cycling performance and rapid capacity attenuation of LiMn2O4 cathodes at high temperature restrict their extensive application. In this study, LiMn2O4 materials are synthesized by a simple rheology-assisted solid-phase method using citric acid as an additive. The citric acid improves the uniformity of the mixed raw materials, resulting in a reduction in particle agglomeration. Consequently, the synthesized LiMn2O4 shows an initial capacity of 117.4 mA h g−1 with a capacity retention of 79.50% at 2C after 300 cycles and 54.78% of the initial discharge capacity at 20C. This work provides a strategy for modifying multicomponent transition metal oxides for advanced lithium-ion batteries.
研究领域:
材料科学
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电化学
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能源存储
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无机固体化学
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电池技术
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DOI
高影响因子
IONICS
·
2023
·Vol. 30
·期 2
·749-757
·
IF 2.8
Cong Jun,Luo Shao-hua,Li Peng-yu,Li Kun,Wang Ya-feng,Yan Sheng-xue,Li Peng-wei,Chen Huan-huan
To realize the high value–added utilization of acid-washed iron red, in this paper, acid-washed iron red is used as raw material. Aiming at the problem of low conductivity of iron-based lithium ion batteries (LIBs) LiFePO 4 /C materials, different metal ions are doped in the iron position, and the microstructure and electrochemical properties of the obtained material are systematically studied. Here, LiFePO 4 /C is synthesized through simple carbothermal reduction method using acid-washed iron red as the iron source. On this basis, La (1%, 2%, 3%) doping modification is carried out. Then doped modification is performed on this basis, preferably 2% La-doped LiFePO 4 /C materials. The XRD patterns show that the diffraction peaks of the samples prepared at all doping amounts can be perfectly matched with the standard card ( PDF # 40–1499), and there is no impurity peak, all of which are pure phases. According to the refined data, it is clear that minor amount of La has successfully replaced the position of Fe and incorporated into the lattice. Electrochemical tests show that LiFe 0.98 La 0.02 PO 4 /C has the highest charge and discharge capacity of 146.5/138.2 mAh·g −1 in the first cycle at 0.5C, and the reversible specific capacity of 136.5 mAh·g −1 remains after 50 cycles. Furthermore, the first-principles calculations more strongly confirm that La doping can significantly improve the defects of low electronic conductivity of LiFePO 4 .
研究领域:
材料科学
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电化学
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能源存储
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无机非金属材料
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固态化学
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DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Jiaxin Li,Junhui Liang,Xin Yao,Hongming Liu,Yuhui Du,Huayu Chen,Hangning Chen,Chenhao Du,Liuqi Wang,Yincheng Li,Yuexiang Huang,Da Chen
The development of low-temperature, nonprecious metal thermocatalysts for ammonia decomposition holds significant promise for advancing the green hydrogen industry. LaNiO3 catalysts, with their perovskite structure (ABX3), are notable for enabling in situ growth of active metal Ni on reduced oxide supports during ammonia decomposition reactions (ADRs). However, unintentional in situ growth can lead to uncontrolled reactions and metal particle agglomeration. To address this, we employed a straightforward high-temperature and pressure hydrogenation pretreatment process to enhance the interaction between the active metal and the support, thereby suppressing the agglomeration of the active metal during the ADR process. Our results indicate that the hydrogenation pretreatment catalyst exhibits finer Ni metal nanoparticles, with an average size of approximately 8 nm. Under a gas hourly space velocity (GHSV) of 18,000 mL gcat–1 h–1 and at 550 °C, the NH3 conversion efficiency reaches 90%, which exhibited excellent stability over a period of 100 h. Additionally, we utilized TEM, XPS, EPR, NH3-TPD, and H2-TPR techniques to elucidate the intrinsic mechanisms related to the enhanced catalytic activity. This study addresses the issue of active metal nanoparticle agglomeration through hydrogenation pretreatment.
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高影响因子
FUEL
·
2025
·
IF 7.5
Guoyang Zhao,Yafei Guo,Pu Huang,Zhouzhou Zhang,Chuanwen Zhao
Developing highly efficient and robust catalysts for low-temperature CO oxidation is essential for CO abatement in sintering flue gas. CuO-Co 3 O 4 catalysts incorporated with transition metal oxides (TMOs) of CeO 2 , ZrO 2 , NiO or Fe 2 O 3 were synthesized using the sol–gel method. The crystalline structure, morphology, electronic structure, surface active sites and redox properties of the composite catalysts were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), CO temperature-programmed desorption (CO-TPD), H 2 temperature-programmed reduction (H 2 -TPR), and O 2 temperature-programmed oxidation (O 2 -TPO). The influence of incorporating TMO on CO oxidation performance of the composite catalysts was thoroughly investigated. Results indicated that incorporating CeO 2 and ZrO 2 enhanced the CO oxidation activity of CuO-Co 3 O 4 significantly, achieving notably low T 100 temperatures of 134 °C and 150°C. The desired CuO-Co 3 O 4 -CeO 2 and CuO-Co 3 O 4 -ZrO 2 composite catalysts also showed outstanding CO oxidation kinetics performance with low activation energies of 25.36 and 26.41 kJ/mol, and remarkable time-on-stream stability, sustaining a near 100 % CO conversion rate for up to 25 h. The superior CO oxidation performance was associated with the smaller crystallite sizes, uniformly dispersed active sites, abundant oxygen vacancies, and enhanced redox properties, all of which stemmed from the strengthened interfacial interactions among the metal oxides upon CeO 2 and ZrO 2 incorporation. These findings offer valuable insights into the structure–property-activity relationships of the CuO-Co 3 O 4 -TMO composite catalysts, positioning the CuO-Co 3 O 4 -CeO 2 and CuO-Co 3 O 4 -ZrO 2 samples as promising candidates for low-temperature CO oxidation in sintering flue gas treatment.
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高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Chenyan Lu,Dajie Zou,Yanyan Jia,Yongchang Lu,Huan Wang,Yanfeng He
In this study, a novel nitrogen-chlorine-codoped carbon quantum dots (NCl-CQDs) with low toxicity, thermal stability, good fluorescence properties, biocompatibility and high sensitivity was successfully prepared by hydrothermal carbonization. Based on the above advantages of NCl-CQDs, the NCl-CQDs was used to construct fluorescence sensing system for fluorescence probes. The maximum fluorescence emission wavelength was obtained at 470 nm when the excitation wavelength was 390 nm. The fluorescence signal was in the state of “ON”. The introduction of 2,6-Dichloroindophenol Sodium (DCIP) resulted in the quenching of fluorescence intensity due to photoinduced electron transfer between DCIP and NCl-CQDs. At this point, the color of the solution changed from brownish-yellow to light blue, indicating that the fluorescence signal was in an “OFF” state. Upon addition of ascorbic acid (AA) to the NCl-CQDs/DCIP system, the corresponding fluorescence signal was restored due to the special interaction between AA and DCIP. The color of the corresponding solution changed from light blue to colorless. The fluorescence signal was in the “on” state. Therefore, an “ON-OFF-ON” sensing system and colorimetric sensing system for AA was constructed using the NCl-CQD fluorescence probe. Under the optimized experimental conditions, the proposed methods exhibited satisfactory linear ranges. Specifically, the linear range for AA detection by the fluorescence sensor spanned from 1.2 μM to 180.33 μM, while that by the colorimetric sensor ranged from 1.32 μM to 166.55 μM. The corresponding detection limits were determined to be 0.68 μM and 0.55 μM, respectively. In summary, this sensing system could effectively enhance selectivity, sensitivity, and accuracy by preventing false positive detection results caused by environmental and system errors.
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高影响因子
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
·
2025
·
IF 3.3
Li Junjie,Liu Kunyi,Kang Kaijie,Zhao Lina,Zhang Banglei,Li Lang,Huang Hai,Jiang Liwen
Fermented salt-free bamboo shoots, a traditional fermented vegetable product, are esteemed in southern China for their unique flavor and aroma. The distinctive taste of these shoots is attributed to the volatile organic compounds (VOCs) and organic acids produced during fermentation. This study explored how organic acids and VOCs change over a 60-day fermentation period. The findings revealed notable variations in pH, total sugars, and organic acids throughout the process. Utilizing GC-IMS (gas chromatography-mass spectrometry) analysis, 65 volatile organic compounds (VOCs) were detected, which comprised alcohols, aldehydes, esters, ketones, and aromatic compounds. The concentration and composition of VOCs changed significantly during the fermentation process. Esters and aldehydes were the predominant VOCs. The changes in organic acids levels were correlated with the production of specific VOCs, indicating complex interactions between organic acids and VOCs during the fermentation process. Employing correlation analysis and OPLS-DA (orthogonal partial least squares discriminant analysis), we identified 14 pivotal volatile organic compounds (VOCs) and organic acids that exert the most significant influence on the flavor profile of fermented salt-free bamboo shoots. This study provides invaluable insights for enhancing both the processing and economic potential of bamboo shoots.
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高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Xiaoqing Song,Xiaoye Wen,Yongfei Huang,Zhefeng Fan
Carbon dots nanozymes were synthesized from fresh garlic and ethylenediamine. • N-CDs showed excellent photo-responsive oxidase-like activity and blue fluorescence. • N-CDs with ethylenediamine doping show higher oxidase activity than undoped CDs. • A smartphone-assisted dual-mode sensing platform was used to detect TBHQ rapidly. Synthesis of highly active carbon dots nanozymes remains challenging. Using fresh garlic and ethylenediamine as precursors, nitrogen-doped carbon dots nanozymes (N-CDs) were fabricated in this study. The N-CDs exhibited light-responsive oxidase-like activity and blue fluorescence. For comparison, the carbon dots (CDs) without ethylenediamine doping demonstrated remarkable catalytic activity. Following doping with ethylenediamine, the maximum reaction rate and specific activity of N-CDs were approximately 1.4 times and 2 times those of CDs, respectively, indicating that nitrogen doping significantly enhanced the catalytic activity. Based on the catalytic performance and fluorescence properties of N-CDs, a dual-mode sensor was constructed for the detection of tert-butylhydroquinone (TBHQ), achieving detection limits of 0.19 μM and 0.05 μM for the colorimetric and fluorescence methods, respectively. Portable on-site detection of TBHQ in real samples was realized by integrating the sensing platform with a smartphone, providing a new strategy for the preparation of high-performance nanozymes. Download: Download high-res image (140KB) Download: Download full-size image
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DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2026
·
IF 4
Min Zhou,Rusen Miao,Xiaoxu Chen,Anqi Wang,Xueman Wei,Initizar Anwar,Yuefei Wang,Hongyan Wang,Fei Tian
A hydrophilic SUPRADES was constructed for selective extraction of isoflavone from P. lobata root. • The SUPRADES achieved 70.4 mg/g puerarin, 1.33–5.33-fold higher than conventional methods. • Selective extraction mechanism was elucidated by FT-IR, ¹H NMR, and DFT theoretical calculations. • The SUPRADES retains >97% extraction capacity over 7 cycles with superior batch reproducibility. • GAPI evaluation verifies the eco-sustainability of the entire isoflavone extraction process. Supramolecular deep eutectic solvents (SUPRADES) have are promising green extraction media for the sustainable extraction of bioactive compounds from plant materials. In this study, a combined strategy of SUPRADES with ultrasound-assisted extraction (UAE) was developed for the efficient extraction and enrichment of isoflavones from the root of Pueraria lobata. The extraction process was systematically optimized using single-factor experiments followed by Box–Behnken design (BBD) response surface methodology. The optimal SUPRADES system consisted of L‑proline and urea at a 1:2 molar ratio, supplemented with 5 wt% β‑cyclodextrin and 30 wt% water. Under these conditions, the yield of puerarin reached 70.4 ± 0.6 mg/g, which is 1.33‑ to 5.33‑fold higher than those obtained with conventional methods. The self‑assembled structure of the SUPRADES and its molecular‑level interaction mechanism with isoflavones were further elucidated by FT‑IR spectroscopy, ¹H NMR spectroscopy, and density functional theory (DFT) calculations. These results confirmed that the extraction process is synergistically driven by hydrogen bonding and β‑cyclodextrin‑mediated host–guest complexation. GAPI evaluation demonstrated the excellent environmental friendliness and sustainability of the established method. Collectively, this study provides a novel and efficient extraction strategy for isoflavones from Pueraria lobata root and offers a theoretical basis for green the extraction of natural products in traditional Chinese medicine. Download: Download high-res image (408KB) Download: Download full-size image
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PubMed
高影响因子
AICHE JOURNAL
·
2026
·
IF 4.4
Aihemaiti Tuniyazi,Jing Li,Feng Li,Yi Zhang,Yating Yuan,Shuting Xi,Sheng Zhang,Shengping Wang
Electrocatalytic CO 2 reduction reaction (ECO 2 RR) faces limitations in conventional reactors due to high energy consumption, inefficient mass transport, and poor durability caused by ion-exchange membranes. Herein, we developed a membrane-free flow electrolyzer that dynamically decouples cathodic CO 2 -to-CO reduction from the anodic oxygen evolution reaction via a regenerative bromide cycle (Br − /BrO 3 − ). Operating at 216 mA cm −2 , the system achieves a record-low cell voltage of 1.85 V, maintains over 99% CO Faradaic efficiency, attains 32.9% single-pass CO 2 conversion, and reaches 71.9% energy efficiency (EE), with negligible degradation over 100 h of continuous operation. Operando spectroscopy reveals that local pH stabilization at 7.2 optimizes *CO/*H adsorption, thereby enhancing CO selectivity and EE. Techno-economic analysis shows a 60% lower power cost (111.8 vs. 277.79 $ ton −1 CO) vs. conventional systems. This work provides new insights into addressing persistent challenges in ECO 2 RR, including mass transfer limitations, carbonate formation, and anodic reaction mismatch.
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高影响因子
Catalysts
·
2026
·Vol. 16
·期 8
·689
·
IF 4.5
Zhongqiang Bao,Yiwei Zhang,Zhenhua Ji,Zhenguo Li,Peng Zhang,Ding Luo,Zhanming Chen,Han Gao,Lei Zhu,Hao Chen
Supported Pt catalysts are highly active for the selective catalytic oxidation of ammonia (NH3-SCO), but their practical use is limited by poor N2selectivity and insufficient hydrothermal durability under high-temperature exhaust conditions. Herein, we report a composition-regulated high-entropy oxide interface strategy to stabilize Pt–Cu dual sites and steer NH3oxidation toward selective N2formation. A series of fluorite-type Ce-based high-entropy oxides, including CeZrLaPrYOx, CeSmLaPrYOx, and CeSnLaPrYOx, were constructed as thermally robust supports for Pt and Cu loading. Among them, PtCu/HEO-Zr calcined at 1000 °C exhibits the best NH3-SCO performance, achieving 90% NH3conversion at 260 °C while maintaining N2selectivity above 80% over a broad temperature window of 100–300 °C under a high weight hourly space velocity of 100,000 mL·g−1·h−1. More importantly, after harsh hydrothermal aging at 800 °C with 10 vol% H2O for 12 h, the catalyst shows negligible activity loss and nearly unchanged N2selectivity, demonstrating exceptional structural and catalytic robustness. Structural and surface analyses reveal that Zr incorporation optimizes the fluorite high-entropy lattice, increases oxygen vacancy concentration, promotes lattice oxygen mobility, strengthens surface acidity, and enriches active Cu2+species, thereby enhancing the interfacial cooperation between NH3activation and oxygen-assisted intermediate conversion. In situ DRIFTS further reveals that PtCu/HEO-Zr favors an Olat-assisted internal selective catalytic reduction pathway, in which adsorbed NH3is activated to -NH2species and subsequently reacts with lattice oxygen-derived intermediates to form N2O22−-like species that decompose into N2and H2O. Meanwhile, the formation of nonselective NOxand N2O products is suppressed. This work highlights high-entropy oxide-supported Pt–Cu interfaces as a promising platform for designing hydrothermally durable and N2-selective NH3-SCO catalysts.
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高影响因子
Materials
·
2026
·Vol. 19
·期 15
·3188
·
IF 3.7
Tianqi Cao,Hongyu Cui,Junyi Liu,Chuanhui Zhang
HighlightsCitric acid-assisted sol–gel method is adopted to synthesize a series of lanthanide-doped Co3O4catalysts.Sm-Co3O4delivers the smallest potential gap and dominates the high-efficiency 4-electron ORR pathway.Sm doping triggers lattice distortion and abundant oxygen vacancies, elevating the Co2+/Co3+ratio to 0.59.Lanthanide ion doping can simultaneously tune electronic structure and lattice defects of spinel Co3O4to enhance oxygen electrocatalytic activity.A structure–activity relationship linking lattice defects, Co valence states and catalytic performance is established.The sluggish kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) at air cathodes severely restrict the practical application of rechargeable zinc–air batteries (ZABs). Herein, equimolar lanthanide-doped spinel Co3O4bifunctional electrocatalysts were synthesized via a citric acid-assisted sol–gel method. Among Ce-, Pr-, La-, and Sm-doped catalysts, Sm-Co3O4exhibits the optimal electrocatalytic performance with a high ORR half-wave potential of 0.72 V and superior OER activity with an overpotential of 1.65 V at 10 mA cm−2, achieving a minimal potential gap ΔE of 0.93 V. Rotating ring-disk electrode (RRDE) measurements and Koutecky–Levich (K–L) analyses confirm the exclusive 4e−ORR pathway. Characterizations reveal that Sm doping modulates the electronic structure and lattice distortion of Co3O4, raises the Co2+/Co3+ratio (0.59) and creates abundant oxygen vacancies, thereby significantly lowering the overpotentials for both ORR and OER. This study provides new insights for designing high-performance spinel-based bifunctional electrocatalysts for ZABs.
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高影响因子
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