SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Ling-ou Yang,Dongjie Tian,Xuelian Liu,Fangyuan Lin,Min Ye,Yiru Wang,Xi Chen
Copper iodide (CuI) clusters have continued been to arouse increasing attention in many fields due to their high cost-performance, abundant reserves, hypotoxicity and structural diversity. Despite the oxygen sensing capability of coordinate CuI clusters has been demonstrated, the ionic counterparts with better structural stability hold potential to construct more durable sensing platform. However, the optical applications of the ionic CuI clusters have been hindered largely by their prominently weak emission. With the progress of ion assembly in recent years, ionic CuI clusters with specific emission properties can be attainable. Herein, two ionic dinuclear CuI clusters with Mn(Ⅱ) crystal field are introduced through fabricating sensing films to exhibit their oxygen sensing performance for the first time. The results reveal that both sensing films presented good reversibility, fast response associated with wide linear responses in the range from 0 % to 90 % gaseous O 2 . When the sensing behaviors of the two clusters were compared, different I 0 /I 100 ratios of 6.6 and 2.1 are observed. Through investigating EPR spectra and time-resolved luminescence spectra , we highlight that different Mn(Ⅱ) crystal field intensity in corresponding clusters lead to distinct oxygen sensing behaviors. In our perception, the possible mechanism could offer new performance modulation strategy based on CuI clusters with multi-emission centers. Owing to the good structural stability of such materials, one of the clusters is used to demonstrate the dissolved oxygen sensing capability of the platform. The study constructs a stable sensing system and will pave the new way for optical application of the family of ionic CuI clusters.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2017
·Vol. 17
·期 12
·8818-8826
·
IF 1.483
Liu Jingwei,Huo Minfeng,Zhu Yan
Mn–Na2WO4/SiO2 synthesized by Urea-assisted hydrothermal-Impregnation route has more and stronger surface basic sites, and more surface lattice oxygen, leading to higher methane conversion with higher selectivity toward ethane and ethylene in oxidative
coupling of methane reaction, compared to Mn–Na2WO4/SiO2 produced by Co-precipitation-Impregnation (CPI) and Sequential Impregnation (SI) methods.
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2017
·Vol. 5
·期 3
·635-642
·
IF 4.036
Di Tian,Xiaofeng Lu,Guangdi Nie,Mu Gao,Ce Wang
Currently, the search for the fabrication of inexpensive and efficient binder-free electrodes for high performance supercapacitor applications is still a great challenge. In this work, different nanostructures of Ni–Mn oxide (Ni–Mn–O) are directly grown on the surface of flexible electrospun carbon nanofibers (ECNFs) and further used as binder-free electrodes for supercapacitors. Among three typical nanostructures, Ni–Mn–O nanosheets on ECNFs show superior electrochemical properties with a good specific capacitance (368.6 F g−1) and excellent rate properties (88.6% retention at 20 times initial current density) in a three-electrode system. Furthermore, an aqueous symmetry cell and a solid-state symmetry supercapacitor are assembled using two pieces of flexible ECNFs@Ni–Mn–O nanosheets. The maximum energy density and power density based on the solid-state supercapacitor are up to 20.4 W h kg−1 and 5.2 kW kg−1, respectively, indicating that the flexible ECNFs@Ni–Mn–O nanosheets present a fairly promising future for practical applications in the field of energy storage.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2024
·
IF 2.5
Zhang Wenhui,Wu Xinbo,Wang Dazhi,Cai Weijie
As the frequency range of electronic devices gradually expands, exploring frequency insensitive electromagnetic wave adsorption (EWA) materials that can achieve effective absorption in all bands has aroused great interest. A series of Fe 1 − x S@C composite materials with three-dimensional conductive networks were successfully prepared in this work. In the preparation process, poly (aryl ether sulfone) with branched carboxylic (PAES-C) was selected as the skeleton and Fe 3+ ions were introduced via chemical adsorption. The main purpose of this work was to develop array porous composite materials with good EWA property. The work proposed a novel controllable method for preparing metal sulfides to explore the electromagnetic wave absorption. This routine was also developed to prepare other M x S@C composites (M = Fe, Cu, Mn). Compared to Mn x S@C and Cu x S@C composites, the RL min value of Fe 1 − x S@C-4 was − 40.6 dB at 13.52 GHz, and at a thickness of 1.5 mm the effective bandwidth reached 3.12 GHz. Furthermore, its effective absorption band covered Ku, X, and C radar bands at different thicknesses.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Haihua Wang,Futao Li,Chao Zhu,Chaoxian Chen,Ze Ding,Xiangping Chen
The rapid growth of the new energy market has led to a substantial increase in the demand for ternary lithium batteries, highlighting the importance of recycling their cathode materials to mitigate environmental risks and alleviate the limited supply of valuable metals. Traditional recycling methods for waste ternary lithium batteries are often inefficient and energy-intensive, particularly in recovering lithium. This study proposes a novel process for the separation and recovery of Li, Ni, Co, and Mn from simulated spent ternary lithium battery cathode materials. The process employs chromatographic separation and column operation techniques using amine-modified polyacrylonitrile fibers as adsorbents, which have selective adsorption capacity for Li with transition metals Ni, Co, and Mn. Experimental results demonstrated a lithium recovery rate of 99.4 % with 100 % purity under optimized conditions: solution pH of 2, feed solution concentration of 10 mmol/L, a fully packed adsorption column, and a feed flow rate of 0.29 mL/min. During the elution process, 0.2 mol/L nitric acid achieved effective desorption of the adsorbed metals. Furthermore, the intermetallic separation coefficients revealed significant separation efficiencies for Ni, Co, and Mn. This proposed method offers notable advantages in recovery efficiency, selectivity, and environmental sustainability, with particularly outstanding performance in lithium recovery, making it a promising strategy for recycling valuable metals from spent ternary lithium batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Zhijiang Rong,Wei Guo,Haotian Liang,Huan Lv,Hua Guo,Yi Zhang,Bo Zhang,Chunyan Hao,Xianjun Liu,Hongyan Sun,Yifan Gao
Biological metal ions play crucial roles in various life processes and exhibit diverse biological functions. Specifically, Ca(II), Mg(II), Cu(II), and Mn (II) ions are intricately involved in insulin function. To further clarify the biological functions of biological metal ions on insulin, the interaction mechanism of insulin affected by Ca(II), Mg(II), Cu(II), and Mn (II) ions were comparably investigated via spectroscopic, circular dichroism(CD), and electrochemical approaches. Electrochemical studies demonstrate that Mn(II) forms an M 2 L-type complex with insulin, exhibiting a binding constant of β Mn = 9.3 × 10 9 , while Cu(II) and insulin form an M 4 L-type complex with a significantly higher binding constant of β Cu =9.18 × 10 12 . Electrochemical investigation of the interaction between Ca(II) and Mg(II) with insulin adsorbed onto a glass carbon electrode surface revealed that the presence of Ca(II) and Mg(II) induced conformational changes in insulin, resulting in reduced adsorption capacity. Additionally, it was observed that the presence of Ca(II) and Mg(II) enhanced the redox signal of probe ions. The binding constants values were calculated to be 1.108 × 10 3 L•mol –1 for the insulin-Ca(II) system and 2.28 ×10 2 L• mol –1 for the insulin-Mg(II) system. Spectroscopic studies showed that the binding of Cu(II) ions to insulin molecules may be controlled by chelation mechanism, and the interaction between Cu(II) ions and insulin molecules may occur in the aromatic region. Mn(II) ion binding is mainly controlled by ionic interactions, and its binding site is far away from the aromatic region.The combination of Ca(II) and Mg(II) with insulin induced a small enhancement in the Ultraviolet-visible (UV) absorption peak, with Ca(II) exhibiting a more pronounced effect compared to Mg(II). The results of spectral, CD and electrochemical studies are consistent.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Sustainable Systems
·
2025
·
IF 6.1
Wei Lin,Yulu Wu,Xinyu Hu,Peng Yang,Hong Wen,Tianfu Zhao,Lianbang Wang,Chaoqi Shen
A well-designed solvothermal approach has been employed to synthesize olivine LiMn 0.5 Fe 0.5 PO 4 (LMFP) cathode material with a nanoplate configuration. This method precisely controls crystal growth to achieve a high proportion of (010) facets while minimizing intrinsic defects. These modifications significantly enhance lithium-ion diffusion kinetics and optimize the electrochemical performance of LMFP. The nanoscale of the (010) facets and the reduced anti-site defect concentration in the MP-PRO sample functionalize jointly to promote lithium-ion transport during the long-cycle. Furthermore, the superior electrochemical performance is closely linked with significantly reduced impedance and enhanced Mn redox kinetics. Both theoretical calculations and experimental results indicate that the confinement effect induced by 1,3-propanediol directs facet orientation and confines nanoplate growth. Compared to the product synthesized using water (MP-H 2 O), the 1,3-propanediol-based sample (MP-PRO) delivers a high specific capacity of 130.7 mAh g −1 at 5C and demonstrates excellent cycling stability, with an 84.6% capacity retention after 1000 cycles. This study provides new insights into the kinetics of Mn redox in LMFP electrodes and reveals an effective electrode structure design to realize long-life high rate batteries.
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Jin Du,Hebin Liang,Yubin Zou,Bing Li,Xiao-yan Li,Lin Lin
The electroreduction of carbon dioxide (CO2) to high-value organic chemicals by the microbial electrosynthesis (MES) system relies heavily on the electrochemical properties of the electrode materials. In this work, CO2 reduction for acetate production was greatly boosted by decorating the carbon felt cathode using the Fe–Mn bimetallic oxides, using an enriched anaerobic mixed culture dominated by the homoacetogen Acetobacterium wieringae. In comparison with the unmodified carbon felt as the cathode in the MES reactor, modification with MnFe2O4 increased the acetate production rate from 28 to 78 g/(m2·d), higher than those with MnO at 59 g/(m2·d) and Fe2O3 at 62 g/(m2·d), and the relative abundance of A. wieringae increased dramatically from 51 to 87% in the biofilm. This was probably due to the mediated electron uptake via the redox cycles of Mn(III)/(II) and Fe(III)/(II), improved specific surface area, and enhanced hydrophilicity of the cathode, benefiting from the synergistic effect of Fe and Mn ions. Overall, this study provides a facile and promising electrode modification strategy for MES with Fe–Mn bimetallic oxides for efficient CO2 conversion and acetate production, bringing the world closer to achieving carbon neutrality.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Xiufeng Wang,Yunyun Zhang,Wenhui Ai,Yao Jin,Ge Chen,Zhiqing Zhang,Guodong Zhang,Ting Zhou,Fang Wang
A ratiometric fluorescence sensor based on Mn doped ZnS QDs was designed to detect ascorbic acid with highly selectivity . The synthesized Mn doped ZnS QDs showed a new luminescence performance due to new electron hole recombination center formed in the nanocrystals . The dopant-related luminescence of Mn 2+ appeared at 590 nm, and the best dopant-related luminescence effect can be obtained by changing the doping amount of Mn 2+ during the synthesis process. Ascorbic acid (AA) is known to be oxidized by Fe 3+ to generate dehydroascorbic acid (DHAA). If DHAA combined with o-phenylenediamine (OPD), a fluorescent product quinoxaline DFQ was obtained. Mixing DFQ with Mn doped ZnS QDs , two fluorescence emission appeared at 434 nm and 590 nm. After optimizing the concentration of Fe 3+ and OPD, solution pH and reaction time, the results showed a good linear relationship between AA and the ratio of F 434 /F 590 . The linear range of this ratiometric fluorescence sensor for detection of ascorbic acid were 0.5–40 μmol·L −1 and 40–80 μmol·L −1 , and the detection limit was low to 0.21 μmol·L −1 . Compared with the single fluorescence analysis method for AA detection, this work has stronger anti-interference and greatly improved sensitivity and selectivity by ratiometric fluorescence.
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2017
·
IF 3.33
Baohuai Zhao,Rui Ran,Li Sun,Zesheng Yang,Xiaodong Wu,Duan Weng
A high-surface-area La-Ce-Mn mixed oxide was synthesized by citrate method, with further acid etching to dissolve the La 3 + ions in the lattice. The acid etching process efficiently improved the specific surface area, increased the ratios of Mn 4 + /Mn n + , Ce 3 + /Ce n + , O α /O tot , and enhanced the oxygen mobility of the catalyst, which were responsible for the superior catalytic performance. Compared to the pristine La 0.8 Ce 0.2 MnO 3 + δ catalyst, the etched one could convert CO and C 3 H 8 more efficiently, with 90% conversion of CO and C 3 H 8 at only 73 and 196 °C, respectively. Such superior catalytic performance made it possible to be used for automotive emission control during cold-start period.
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2024
·
IF 11.4
Hongmei Tang,Meiqing Chen,Pingxiao Wu,Yihao Li,Tianming Wang,Jiayan Wu,Leiye Sun,Zhongbo Shang
Schwertmannite (Sch) is considered as an effective remover of Chromium (Cr) due to its strong affinity for toxic Cr species. Since the instability of Sch, the environmental fate of Cr deserves attention during the transformation of Sch into a more stable crystalline phase. The ubiquitous manganese(II) (Mn(II)) probably affects the transformation of Sch and thus the environmental fate of Cr. Therefore, this study investigated the impact of Mn(II) on the transformation of Cr-absorbed Sch (Cr-Sch) and the associated behavior of SO 4 2− and Cr. We revealed that the transformation products of Cr-Sch at pH 3.0 and 7.0 were goethite and Sch, respectively. The presence of Mn(II) weakened the crystallinity of the transformation products, and the trend was positively correlated with the concentration of Mn(II). However, Mn(II) changed the transformation products of Cr-Sch from hematite to goethite at pH 10.0. Mn(II) replaced Fe(III) in the mineral structures or formed Mn-O complexes with surface hydroxyl groups (-OH), thereby affecting the transformation pathways of Sch. The presence of Mn(II) enhanced the immobilization of Cr on minerals at pH 3.0 and 7.0. Sch is likely to provide an channel for electron transfer between Mn(II) and Cr(VI), which promotes the reduction of Cr(VI). Meanwhile, Mn(Ⅱ) induced more -OH production on the surface of secondary minerals, which played an important role in increasing the Cr fixation. In addition, part of the Mn(Ⅱ) was oxidized to Mn(Ⅲ)/Mn(Ⅳ) at pH 3.0 and pH 7.0. This study helps to predict the role of Mn(II) in the transformations of Cr-Sch in environments and design remediation strategies for Cr contamination.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 22
·13106-13115
·
IF 10.7
Ziying Shi,Enzuo Liu,Biao Chen,Junwei Sha,Lihua Qian,Zhijia Zhang,Xiaopeng Han,Wenbin Hu,Chunnian He,Naiqin Zhao,Jianli Kang
The interaction mechanism of the multi-element oxide electrodes remains a challenge, despite the fact that their synergy can not only improve the electronic structure, but also broaden the working potential window to some extent. Herein, the simple NiMn alloy system was taken up as a model to investigate the origin of the wide voltage window. Compared with conventional electrodes, this sandwich-type nanoporous-NiO(MnOx)@Ni electrode derived from a NiMn alloy could exhibit a wide working potential window of 1.5 V in aqueous electrolyte. The facilitated successive redox reactions between NiO and MnOx throughout the entire potential window strongly promote the capacitance extension without water decomposition, despite the fact that the cycling lifespan was limited by chemical dissolution of MnOx. The assembled quasi-solid-state supercapacitor can overcome the irreversible conversion and exhibit a remarkable lifespan of 5000 cycles at 10 A cm−3 (91% retention) and high energy density (37.67 mW h cm−3 at 0.2 A cm−3). This work provides new perceptions for the design of multi-element collaborative energy storage electrodes.
✓ 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）