MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Siyu Wu,Xiaojuan Niu,Jiali Chen,Wangni Meng,Han Tao,Jianli Zhou,Yuangen Wu
Kanamycin (KAN) can generate a serious threat to human health due to its tendency to accumulate in food. Current colorimetric strategy for KAN detection still faces some challenges, and nanozyme-based colorimetry is an ideal alternative approach. Herein, a non‑copper-based multivalent laccase mimic named Mn-Car is first synthesized through a self-assembly of manganese ions and the endogenous biomolecule carnosine, which is further used to develop a novel colorimetric method for ultrasensitive and selective detection of KAN. The laccase-like catalytic center is formed through the multidentate chelation bonds between manganese ions and imidazolium groups of histidine as well as carboxyl groups of β-alanine in carnosine. The multivalent oxidation states of manganese dynamically regulate electron transfer pathways through synergistic coordination. The unique Mn-Car architecture drives the efficient generation of superoxide radicals (O 2 · − ) and semiquinone radicals (SQ· − ). Leveraging the excellent laccase-like activity of Mn-Car , a highly sensitive colorimetric method for KAN detection is developed. Mn-Car forms polydentate chelation with the amino and hydroxyl groups in KAN, which can trigger multi-step cascade oxidation reactions that disrupt the structural core of Mn-Car and lead to reduced colorimetric signals. The colorimetric method achieves a limit of detection (LOD) of 0.102 μM and is successfully applied for on-site detection of KAN in water samples and honey, providing a novel platform for antibiotic residue analysis.
研究领域:
分析化学
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纳米技术
·
生物传感
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2020
·
IF 5.578
Hao Qu,Sihui He,Yue Su,Yulong Zhang,Haiquan Su
Direct synthesis of ethanol from syngas (a mixture of H 2 and CO) is considered as an eco-friendly and industrially important process to produce renewable fuels and chemicals. The current non-noble metal catalyst systems suffer from either low selectivity or multiple processes with high energy consumption. Here, we report a novel molybdenum diselenide-based catalyst system for high-selective conversion of syngas into ethanol. For a series of K-promoted MoSe 2 catalysts with different K/Mo ratios (K x -MoSe 2 , x = 0.25-1.00), K 1.00 -MoSe 2 surprisingly exhibits excellent ethanol selectivity up to 58.7 C mol % in total alcohols and 31.1 C mol % in the total product, which is higher than the highest selectivity value for the non-noble metal catalysts reported in the literature. The high ethanol selectivity is attributed to the formation of K-Mo-Se active phase and the synergistic effect of the Mo IV , Mo V and Mo VI multivalent species in the active phase. This study opens up a highly selective non-noble metal catalyst system for the direct synthesis of ethanol by syngas, which is of practical significance for the catalytic conversion of hydrogen-poor syngas.
研究领域:
化学工程
·
催化科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Meng Zhang,Xuezhang Xiao,Zhouming Hang,Man Chen,Xuancheng Wang,Nan Zhang,Lixin Chen
Magnesium hydride, as a potential solid state hydrogen carrier has attracted great attention around the world especially in the energy storage domain due to the high hydrogen storage capacity and the good cycling stability. But kinetic and thermodynamic barriers also impede the practical application and development of MgH 2 . Nanoscale catalysts are deemed to be the most effective measure to overcome the kinetic barrier and lower the temperature required for hydrogen release in MgH 2 . NbN nanoparticles (~20 nm) with intrinsic Nb 3+ -N and Nb 5+ -N were prepared using the molten salt method and used as catalysts in the MgH 2 system. It is found that the NbN nanoparticles exhibit a superior catalytic effect on de/rehydrogenation kinetics for the MgH 2 /Mg system. About 6.0 wt% hydrogen can be liberated for the MgH 2 +5NbN sample within 5 min at 300 °C, and it takes 12 min to desorb the same amount of hydrogen at 275 °C. Meanwhile, the MgH 2 +5NbN sample can absorb 6.0 wt% hydrogen within 16 min at 150 °C, and absorb 5.0 wt% hydrogen within 24 min even at 100 °C. Particularly, the catalyzed samples exhibit excellent hydrogen absorption/desorption kinetic stability. After multiple cycles, there is no kinetic attenuation and the hydrogen capacity remains at about 6.0 wt%. It is demonstrated that the NbN nanoparticles with intrinsic multiple valence can be the critical effect in improving the hydrogen storage kinetics of MgH 2 . The stability of Nb 4 N 3 phase and Nb 3+ -N and Nb 5+ -N valence states can ensure a stable catalytic effect in the system.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
Energy & Environmental Materials
·
2020
·Vol. 4
·期 4
·603-610
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IF 0
Wanwei Jiang,Haiting Shi,Xijun Xu,Jiadong Shen,Zhiwei Xu,Renzong Hu
Aqueous Zn-ion battery has emerged as one of the most prospective energy storage devices due to its low cost, high safety, and eco-friendliness. However, Zn-ion batteries are bottlenecked by significant capacity fading during long-term cycling and poor performance at high current rates. Here, we report an available cooperation of multivariate manganese oxides@carbon hybrids (MnO 2 /MnO@C and MnO 2 /Mn 3 O 4 @C) via a plasma-assisted design as an attractive Zn-ion cathode. Among them, the MnO 2 /MnO@C cathode exhibits a reversible specific capacity of 165 mAh g −1 over 200 cycles at a high rate of 0.5 A g −1 , and possesses great rate performance with high capacities of 110 and 100 mAh g −1 at a high rate of 0.8 and 1 A g −1 , respectively. The good cathode performance significantly results from the facile charge transfer and ions (Zn 2+ and H + ) insertion in the manganese oxides/carbon hybrids featuring phase stability behavior in the available cooperation of multivalence and carbon conductive substrates. This work will promote the Zn-manganese dioxide system for the design of low-cost and high-performance aqueous rechargeable Zn-ion batteries.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Tao Huang,Dongping Song,Chunhai Yang,Shu-wen Zhang
Nonthermal plasma (NTP) irradiation was employed to adjust the morphological structures and valence distribution of ferromanganese ( Fe–Mn )-based binary hydro (oxide) to enhance the heterogeneous adsorption of uranyl ions. The output voltage and the liquid-plate distance played a more vital role among the NTP factors in the irradiation system in influencing the polyvalent Fe–Mn binary hydro (oxide) ( poly-Fe-Mn ). The formation of plates, flakes, and nanoscale nodules was specifically observed, which caused more pores and fractures in the poly-Fe-Mn binary hydro (oxide). The poly-Fe-Mn performed explicitly better in the adsorption of uranium ions in comparison with the counterpart of the Fe–Mn , which was appropriately fitted by the pseudofirst-order kinetic and Elovich models. Maximum equilibrium adsorption capacities of 663.92 and 923.45 mg/g were obtained for the Fe–Mn and poly-Fe-Mn binary hydro (oxides) toward U ions in the orthogonal design, respectively. The maximum monolayer adsorption capacity achieved by the fitting of the Langmuir model was 1091.10 mg/g. Both physisorption and chemisorption contributed to the heterogeneous process of the poly-Fe-Mn toward uranium ions. The employment of NTP irradiation changed the monolayer adsorption of the traditional Fe–Mn materials and diversified the reaction mechanisms between the interface of the Fe–Mn materials and uranium ions. The elements, including O, N, and U exhibited higher compatibility and overlapped in the samples. The highly effective capture of uranium ions from the solution by the poly-Fe-Mn binary hydro (oxide) was mainly related to the chemical deposition of O and N radicals.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Shuanglong Zhou,Liang Zhao,Yuanduo Li,Hangkai Shi,Weizhou Wang,Yu Dai,Jianping Lai,Lei Wang
Coupling furfural electrochemical hydrogenation (FEH) with hydrazine oxidation (HzOR) in an electrochemical process offers an effective pathway to obtain high-value products, while simultaneously addressing hydrazine contamination and lowering overall energy consumption. Although Ru has been recognized as an effective bifunctional catalyst toward both FEH and HzOR, challenges remain in achieving large current densities and fully clarifying the underlying activity and mechanism. In this work, a Ru-based device was engineered by introducing Mo dopants to regulate the proportion of Ru 0 and Ru 4+ species, which enabled a remarkable current density of 500 mA cm −2 at 0.31 V. Combined experimental and theoretical investigations demonstrate that Ru 0 sites enhance water dissociation to generate active hydrogen for subsequent hydrogenation, while Ru 4+ sites stabilize the (C 4 H 3 O)CH 2 O* intermediate during FEH. For HzOR, Ru 4+ lowers the barrier of the rate-determining step, thus accelerating the overall process, whereas Ru 0 facilitates dehydrogenation and the release of N 2 . Notably, the integrated FEH–HzOR system dramatically reduces the electricity demand for converting furfural to furfuryl alcohol, requiring only 32,711 kWh per ton of FA, which corresponds to a 69.5 % energy saving compared with conventional FEH (97,766 kWh per ton).
研究领域:
电化学
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纳米催化
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能源化学
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环境催化
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绿色合成
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Qi Wang,Shanshan Zheng,Tong Li,Zhou Wang
Nowadays, given the booming demand of blood sugar control from the soaring number of diabetes patients and the insufficient stability of costly enzyme-based glucose sensors in clinic, the development of enzyme-free sensors has been drawing tremendous attraction. Herein, we fabricated a unique structure of Ni/NiO hybrid nanoparticles with mixed-valence states encapsulated in and cross-linked by nitrogen-doped graphene via a facile Ni-MOF-annealing approach and developed its notable feature in efficiently non-enzymatic glucose sensing. The microstructure and valence states, proved vital to the electrochemical activity and sensing performance, were simultaneously regulated by the annealing temperature. The optimized sample obtained at 400 °C displays the superior activation behavior and best glucose sensing performance, offering a high sensitivity of 3.2518 mA mM −1 cm −2 , a wide linear range (0.001–3.568 mM), a low detection limit (0.032 μM, S/N = 3) as well as excellent selectivity, good reproducibility, long-term stability, and satisfactory applicability in real sample. By further investigation of the electrochemical kinetics mechanism, the synergistic effect of multivalent system and well-organized microstructure was proved beneficial for charge transfer, activation of reaction sites, and elimination of electrode polarization as well, thus providing a promising strategy in designing non-enzymatic biosensor platform for glucose detection in actual diagnosis.
研究领域:
材料科学
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生物医学工程
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分析化学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2025
·
IF 5.1
Xiangming Wang,Yang Zhao,Han Qin,Feng Yan,Tao An,Weimin Liu,Yu Su,Xianbo Yu
Magnesium batteries exhibit promising prospects owing to their high theoretical volumetric capacity, abundant natural reserves, and superior safety. However, their practical applications are hindered by the sluggish diffusion kinetics of Mg2+ in conventional cathode materials. This study innovatively proposes a strategy for the epitaxial growth of imine-linked covalent organic frameworks on the surface of carbon nanotubes (CNTs@COF), thereby effectively balancing electrode conductivity and the density of active sites through precise control of the COF layer thickness. This composite material not only facilitates the efficient diffusion of Mg2+ via axially aligned COF channels and continuous charge transport networks but also enhances electrical conductivity through the incorporation of CNTs, significantly improving the energy storage performance, cycling stability, and utilization efficiency of active sites in magnesium batteries. Furthermore, the Mg2+ storage mechanism in CNTs@COF is hypothesized to involve the storage of six electrons per CN bond within each COF unit. As a result, CNTs@COF exhibits superior discharge capacity, rate capabilities, and cycling performance (e.g., 191.7 mAh g−1 at 20 mA g−1 after 200 cycles and 107.6 mAh g−1 at 500 mA g−1 after 3000 cycles). The synthetic approach paves the way for constructing high-performance multivalent battery systems, bridging the gap from molecular design to macroscopic electrochemical performance.
研究领域:
材料化学
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电化学
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能源存储
·
纳米材料
·
电池技术
·
功能材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Magnesium and Alloys
·
2025
·
IF 13.8
Xiaoying Yang,Xinqiang Wang,Ruijie Liu,Yanxia Liu,Zhenglong Li,Wengang Cui,Fulai Qi,Yaxiong Yang,Jian Chen,Hongge Pan
The role of catalysts in enhancing the hydrogen storage kinetics of the Mg/MgH 2 system is pivotal. However, the exploration of efficient catalysts and the underlying principles of their design remain both a prominent focus and a significant challenge in current research. In this study, we present a bimetallic oxide of Bi 2 Ti 2 O 7 hollow sphere as a highly effective catalyst for MgH 2 . As a result, the Bi 2 Ti 2 O 7 -catalyzed Mg/MgH 2 system lowers the hydrogen desorption initiation temperature to 194.3 °C, reduces the peak desorption temperature to 245.6 °C, decreases the dehydrogenation activation energy to 82.14 kJ·mol −1 , and can absorb 5.4 wt. % of hydrogen within 60 s at 200 °C, demonstrating outstanding hydrogen ab/desorption kinetics, compared to pure MgH 2 . Additionally, it can maintain a high hydrogen capacity of 5.2 wt. %, even after 50 dehydrogenation cycles, showing good cycle stability. The characterization results show that the high-valent Bi and Ti in Bi 2 Ti 2 O 7 are reduced to their low-valent or even zero-valent metallic states during the dehydrogenation and hydrogenation process, thus establishing an in-situ multivalent and multi-element catalytic environment. Density functional theory calculations further reveal that the synergistic effects between Bi and Ti in the Bi-Ti mixed oxide facilitate the cleavage of Mg-H bonds and lower the kinetic barrier for the dissociation of hydrogen molecules, thereby substantially enhancing the kinetics of the Mg/MgH 2 system. This study presents a strategic method for developing efficient catalysts for hydrogen storage materials by harnessing the synergistic effects of metal elements.
研究领域:
材料科学
·
能源存储
·
催化
·
纳米技术
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Linzhu Zhang,Quan Xiang,Ruoweng Liang,Guiyang Yan,Zhiyu Liang,Renkun Huang
Cerium-based metal-organic frameworks (Ce-MOFs) are emerging as hierarchical photocatalysts with tunable electronic structures, demonstrating significant potential for tetracycline (TC) degradation. In this work, mixed-valence cerium metal-organic framework (MVCM) was synthesized by a one-step partial oxidation strategy. Various characterization techniques were systematically employed to investigate the morphology, structure and optical properties of MVCM. It was found that multivalent regulation could enhance the visible light response and inhibit the recombination of photoinduced charges, thus overcoming the drawback of conventional Ce-MOF. When tetracycline was used as the target pollutant, the degradation rate of MVCM-1.0 reached 95 % after 80 min of illumination, which was ninefold higher than that of the pristine Ce-MOF. Moreover, the MVCM-1.0 exhibite excellent stability and recyclability. The degradation mechanism was analyzed through various approaches, including active species trapping experiments, electron paramagnetic resonance measurements, and relevant electrochemical analyses. In addition, the main degradation products and the possible decomposition routes of TC were inferred by combining liquid chromatography-mass spectrometry (LC-MS). This work deepens the understanding of the internal relationship between the structure and performance of photocatalysts.
研究领域:
材料科学
·
环境科学
·
无机化学
·
光催化
·
纳米技术
✓ 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）