CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yilong Tian,Meng Xu,Feng Gong,Kebing Yi,Hui Xu,Fuxiang Zhou,Xinghu Ji,Zhike He
Mn-doped perovskites have been extensively studied due to their lower heavy metal toxicity and unique optoelectronic properties. However, their intrinsic sensitivity to water limits the extending applications. Besides, the synthesis methods of Mn-doped perovskite still need to be completed in non-polar solvents, which will also cause environmental pollution. Developing new methods will help solve these problems. In this work, we have developed a method for the synthesis of Mn-doped perovskites in aqueous solution. The synthesized perovskites possess excellent stability in water and can be directly dispersed in water without any post-treatment. The perovskites have two photoluminescence peaks belonged to exciton transition and Mn 2+ transition respectively, resulting in diverse color variations during the fast anion exchange process. Based on this, a Mn:CsPb(Cl/Br) 3 based chloride probe is designed. The probe is able to achieve quantitative detection of chloride ion through wavelength shift and photoluminescence intensity ratio, with detection limits of 26.7 μM and 67 μM, respectively. Besides, visual detection is also achieved with limitation of 0.5 mM. This three-mode probe effectively addresses the requirements for both accurate quantification and visual identification of chloride ions, demonstrating the vast potential of perovskites in biosensing.
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高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Wenping Cao,Jiabin Tu,Nuo Xu,Zhuang Wang,Xinyan Xiong,Qianru Lin,Jiazhi Wang,Nan Zhang,Jie Sheng,W.L. Li
Optimizing energy storage performance often involves increasing the discrepancy between maximum polarization and remanent polarization ( P max - P r ) and breakdown strength ( E b ). Here, aging treatment in acceptor doped NBT-based film is taken for increasing both E b and P max - P r by constructing ordered defect dipoles. Enhanced P max - P r value of 80.6 μC/cm 2 and high E b of 2630 kV/cm are obtained in the aged (Na 0.5 Bi 0.5 ) 0.55 Sr 0.45 Ti 0.99 Mn 0.01 O 3 thin film, which can be attributed to the reversible domain switching caused by ordered defect dipoles and low oxygen vacancies concentration. Accordingly, an energy density of 72.4 J/cm 3 with an efficiency of 76.8 % was achieved simultaneously in the aged film, which are approximately raised by 80.6 % and 45.2 %, respectively, compared with the unaged state. The stable energy storage performances are achieved within the scope of operating temperatures (20–200 ◦ C) and frequencies (0.2–10 kHz). These results provide a new route to take usages of aging process for optimizing the energy performance of NBT-based thin films.
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高影响因子
Communications Chemistry
·
2025
·Vol. 8
·期 1
·1-14
·
IF 6.2
Xu Weiyuan,Cai Zheng,Carniato Fabio,Lu Yi,Ye Xinjian,Xiao Xinhui,Xu Jiao,Mo Gengshen,Ding Yinghui,Jian Yong,Ruan Xinzhong,Yan Zhihan,Ye Fangfu,Platas-Iglesias Carlos,Botta Mauro,Dai Lixiong
Manganese(II) is considered a valuable alternative to gadolinium(III) in developing contrast agents (CAs) for magnetic resonance imaging (MRI). However, due to the labile nature of common Mn(II) complexes, designing ligands that enable stable and inert complexation is essential before clinical application. Mn(1,4-Et4DO2A) bearing four ethyl groups, is found to have a log K MnL as high as 17.86, together with a pMn of 7.52 at pH 7.4. Kinetically, Mn(1,4-Et4DO2A) is approximately 20 times more inert than Mn(1,4-DO2A) in the presence of a 25-fold excess of Zn(II) at pH 6.0 and 37 °C, with the incorporation of a benzoic group to one pendant arm extending the half-life time ( t 1/2 ) to around 22 hours. Its r 1 is measured as 2.34 and 2.20 mM −1 s −1 at 310 K and 1.5 and 3.0 T, respectively, representing an approximate 50% increase compared to Mn(1,4-DO2A). Mn(1,4-Et4DO2A) shows hepatic preference in mice, and its efficacy in diagnosing orthotopic hepatocellular carcinoma (HCC) is also confirmed.
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PubMed
高影响因子
BIOMASS & BIOENERGY
·
2025
·
IF 5.8
Hongrui Guo,Chengjie Sun,Mo Qiu,Hejuan Wu,Zhihui Ma,Jirui Yang,Feng Shen
The catalytic oxidation of glucose to formic acid (FA) represents a crucial route for biomass valorization. Metal–organic framework (MOF)-derived carbon composites offer exceptional tunability for catalyst design. Herein, a series of carbon-regulated Mn x O y /C catalysts from Mn-MOF-74 precursors via controlled calcination atmospheres and temperatures, achieving satisfactory performance in glucose-to-FA conversion. Comprehensive characterization reveals that the carbon matrix plays a synergistic effect: dispersing Mn x O y nanoparticles to enhance substrate accessibility, and preventing Mn leaching to improve stability. The FA yield is determined by fine-tuning key parameters: the (Mn 2+ +Mn 3+ )/Mn valence ratio and Mn x O y particle size. Combined DFT and experimental analyses demonstrate that Mn valence states determine reaction kinetics: Mn 3 O 4 exhibits elevated glucose adsorption energy and reduced formic acid (FA) desorption energy, while MnO displays an opposing trend, rationalizing the activity differences. This work establishes a carbon-mediated synergy strategy for designing efficient Mn-based catalysts in biomass oxidation upgrading.
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高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 193
·期 1
·43
·
IF 5.3
Chen Guo-Ying,Luo Mao-Ling,Chai Tong-Qing,Dai Jing-Jing,Yang Feng-Qing
The composite materials of Mn oxide nanowires and ZIF-8 (Mn x O y NWs@ZIF-8-NF and ZIF-8@Mn x O y NWs-TH) with controllable sizes and morphologies (nanoflower and Tanghulu-like) were successfully synthesized using different solvents (water and dimethylformamide (DMF) under mild reaction conditions. The systematic investigation was conducted to evaluate the effects of key synthesis parameters, including precursor concentration, metal-to-ligand ratio, temperature, and time, on the microstructure and crystalline morphology of the materials. Furthermore, the synthesis mechanisms of the materials in different solvents (water and DMF) were explored, revealing the influence of solvent molecules on their crystal growth processes. The prepared materials serve as “tandem enzymes” (a single nanozyme composite can perform multiple or sequential catalytic reactions), possessing multiple enzyme-like activities (hydrolase- and oxidase (OXD)-like activities). Kinetic studies indicate that the Mn x O y NWs@ZIF-8-NF composite exhibits excellent hydrolase-like catalytic activity, characterized by the high substrate affinity and maximum reaction rate ( K m : 0.01493 mM, V max : 161.42 × 10 –8 M/s). Moreover, Mn x O y NWs@ZIF-8-NF exhibits high specificity and interference-resistance in fluorescent detection of glucose oxidase (GOX) based on its hydrolase and OXD-like activities. In short, this work investigates the role of solvents as one aspect of tailoring material properties, contributing to the development of advanced functional materials and offering a methodological reference for GOX detection. Graphical
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PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Jiaping Guan,Guomin Sun,Gaoyuan Yu,Yu Chen,Jiawen Wei,Xiaohui Zhu,Xiaogu Huang
Sodium-ion batteries (SIBs) have garnered significant interest due to their cost-effectiveness and operational similarities to lithium-ion batteries. Amongst the various components, the cathode plays a pivotal role in determining the energy density of these batteries. Mn-based layered oxides stand out as promising cathode materials, owing to their abundance and non-toxicity. However, these oxides tend to suffer from structural instability during high-voltage cycling, leading to a decline in capacity. In this work, we have designed Ce-doped Na 0.6 Li 0.2 Mn 0.79 Ce 0.01 O 2 cathodes through a solid-state reaction process. This innovation aims to inhibit undesirable phase transitions and enhance the electrochemical performance of the electrodes. By integrating electrochemical testing with a suite of characterization techniques, we have shown that 1 mol% Ce doping effectively suppresses the formation of birnessite and the irreversible oxygen redox reactions in the high-voltage region. Moreover, our findings indicate that the detrimental phase transitions can be significantly mitigated throughout the electrochemical cycling process, thereby bolstering structural stability. Notably, the capacity of the Ce-doping cathode after 20 cycles substantially exceeds its initial discharge specific capacity, reaching 169.3 mAh g –1 . This research introduces a strategy for stabilizing the cathode structure of P2-type Mn-based layered oxides through Ce-doping, offering valuable insights for the advancement of next-generation SIBs.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2022
·
IF 10.319
Qi Xue,Tao Hang,Jianghu Liang,Chun-Chao Chen,Yunwen Wu,Huiqin Ling,Ming Li
Memristors have been seen as promising candidates for next-generation nonvolatile memory and neuromorphic computing . Solution-processed memristors can offer many advantages, such as low-cost fabrication, large-area uniformity, and high versatility. However, the high annealing temperature of the solution process and unsatisfactory performance are impeding the advancement of flexible memristors. In this work, the combustion method was proposed to fabricate the Mn-ZnO-based memristor without a high-temperature process on the flexible substrate. The device demonstrates stable bipolar resistive switching behavior with ultralow switching voltage (−0.6 V/0.71 V), high on/off ratio (˃ 2 × 10 3 ), multilevel storage capability, and uniform resistance distribution ( σ / µ = 18%/16%). The flexible device with a bend radius of 10 mm shows no obvious performance degeneration compared with the device in the flat state. Furthermore, tunable repetitively synaptic weight was achieved by the memristor. Synaptic plasticity functions, such as excitatory postsynaptic current, paired-pulse facilitation, and learning/forgetting behaviors, have been emulated. This work provides a simple and feasible strategy for fabricating the flexible high-performance memristor, with the expectation to facilitate the development of flexible electronics.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Lingqian Ye,Hao Fu,Ruirui Cao,Jun Yang
Prussian Blue analogs (PBAs) are a suitable aqueous zinc-ion batteries (AZIBs) cathode material, but they face issues related to low specific capacity and cycling lifespan due to insufficient active sites and poor ion de-intercalation structural stability. In this study, Mn-Prussian Blue Analog (Mn-PBA) is fabricated using a simple co-precipitation method and the morphology of Mn-PBA is further optimized through artificially manipulating concentration gradients strategy, effectively enhancing the structural stability of Zn 2+ de-intercalation. Furthermore, the introduction of Mn established dual Zn 2+ active centers in Mn-PBA (Mn-O and Fe(CN) 6 ] 4− /[Fe(CN) 6 ] 3− ), leading to an increased specific capacity. As a proof of concept for AZIBs, the optimized Mn-PBA-3 cathode exhibits a high reversible specific capacity of 143.5 mAh/g and maintains a capacity retention of 88.5 % after 250 cycles at 1 A/g, surpassing commercial MnO 2 (30.5 mAh/g after 100 cycles). Mn-PBA-3 also delivers a high capacity of 79.0 mA h g −1 after 2000 cycles of 10 A/g. The mechanism of the Zn 2+ double redox reaction of Mn-PBA-3 has been revealed in detail by in situ Raman and a series of ex situ techniques. Under a high operating voltage window of 0–1.9 V, Zn//Mn-PBA-3 demonstrates a capacity of 99.3 mAh/g after 800 cycles (5 A/g) by assembling zinc ion button battery. This work has reference significance for structurally modulated PBAs used in high performance AZIBs.
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高影响因子
ADVANCED POWDER TECHNOLOGY
·
2021
·Vol. 32
·期 8
·2940-2949
·
IF 4.833
Shanfang Lan,Qing Hu,Qianqian Zhao,Weihui Jiang,Jianmin Liu,Guo Feng,Feng Jiang,Huidong Tang,Junhua Chen
With the increasing popularity of the black decorative ceramics, the development of black pigment with good properties has become significant for the ceramic industry. A Mn-doped zirconium silicate encapsulated carbon (C@ZrSiO 4 ) black pigment was successfully prepared via non-hydrolytic sol-gel (NHSG) method at 800 °C, while MnCl 2 and carbon-containing precursors (tetraethoxysilane, TEOS) were used as Mn and in-situ carbon sources, respectively. The results demonstrated that the L* value of black pigment first decreased and increased with the increase of MnCl 2 content. The as-prepared pigment with the MnCl 2 content of 10 mol% showed a deep dark hue ( L* = 27.64, a* = 0.67, b* = 0.68), while the pigment without Mn doping exhibited poor chromatic properties ( L * = 51.18). Moreover, XPS and EPR results indicated that the Mn(II) and Mn(IV) replaced the Zr(IV) in ZrSiO 4 , resulting in the formation of oxygen vacancies. In-situ carbon provided by TEOS incorporated into these oxygen vacancies, which can protect carbon from being oxidized. In addition, the prepared pigment exhibited higher chemical stability in acid/alkali solutions, favorable tinting strength and thermal stability in base transparent glaze, which displayed wide application prospect in the field of ceramic decoration.
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高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2020
·
IF 2.213
Liang Xu,Fenglian Fu,Peijing Yu,Guangzhao Sun
To efficiently treat hexavalent chromium (Cr(VI)) wastewater, K2FeO4 was used to remove and reduce Cr(VI) in presence of Mn(II) in this paper. Batch removal experiments were carried out to study the effect of Fe/Mn molar ratios, initial pH, in-situ and ex-situ and co-existing ions on Cr(VI) removal. The results showed the removal efficiency of Cr(VI) was 97.7% for the initial Cr(VI) concentration of 10.0 mg/L at Fe/Mn molar ratio of 2:3 and initial pH 8.0. Meanwhile, the high removal efficiency of Cr(VI) had been maintained throughout the pH range of 3.0–8.0 in the experimental study. Moreover, the removal process was relatively stable regardless of in-situ and ex-situ, and co-existing ions such as Ca2+ and low concentration of HCO3− had no intense effect on Cr(VI) removal, while SO42− inhibited Cr(VI) removal in the reaction system. To investigate the removal mechanism of Cr(VI) by K2FeO4 in presence of Mn(II), the reaction products were characterized by the Fourier transformed infrared spectrometer, X-ray powder diffraction, Transmission electron microscopy and the high-resolution X-ray photoelectron spectroscopy. The results indicated the ferrate decomposition products of γ-FeOOH/γ-Fe2O3 had the ability to adsorb Cr(VI) and react with Mn(II) to form γ-Fe2O3-Mn(II) complex to adsorb and reduce Cr(VI).
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高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Xiaoyang Wang,Xiaoqing Si,Jianwei Gao,Qihan Zhou,Chun Li,Mingshen Li,Junlei Qi,Jian Cao
The high preparation cost and poor density of spinel coatings for stainless steel interconnect have always been puzzling conundrums for the solid oxide fuel cell stack developers. Herein, the microwave heating technology for fabricating Mn–Co spinel coating is developed to address these issues. We designed a device spontaneously providing reducing atmospheres and realized the low-cost, high-efficiency reduction of Mn–Co spinel via microwave heating. Dense coatings (MnO + Co) are formed on the steel surface at ∼1100 °C. The excellent density is related to the melting of Co particles induced by microwave selective heating. At initial, microwave heating is dominated by dipolar polarization, interfacial polarization, and natural resonance. After forming metallic Co, conductive loss and the lens effect further accelerate the reduction process. High-quality spinel coatings are formed during the subsequent oxidation at 800 °C, exhibiting an extremely low area-specific resistance increase rate.
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高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Junhao Cao,Zekun Wang,Xinyu Ma,Xiaohong Liu,Guilin Feng,Wei Xiang
O3-type NaNi 2/9 Fe 1/3 Cu 1/9 Mn 1/3 O 2 is considered a promising layered oxide cathode for sodium-ion batteries, owing to its high operating voltage and cost-effective elemental composition. However, its practical application is hindered by irreversible phase transitions at high voltages, which severely compromise structural integrity and cycling stability during prolonged operation. To address these challenges, elemental doping has emerged as an effective strategy to modulate crystal lattice parameters and suppress detrimental phase evolution. In this study, we propose a multi-element (Li/Mn/Al) doping approach, synthesized via a hydroxide-precursor-assisted sodiation process, to enhance the structural robustness and electrochemical performance of O3-type NaNi 2/9 Fe 1/3 Cu 1/9 Mn 1/3 O 2 . Specifically, Aluminum doping serves as a structural pillar to stabilize the transition metal-oxygen (TM-O) framework, effectively mitigating layer gliding. Meanwhile, Li doping activates the Fe 3+ /Fe 4+ redox couple, enabling charge compensation and enhancing reversible capacity. Benefiting from the synergistic effects of Li/Mn/Al co-doping, the resulting Na(Ni 2/9 Fe 1/3 Cu 1/9 Mn 1/3 ) 0.96 Mn 0.02 Al 0.01 Li 0.01 O 2 cathode demonstrates suppressed Jahn-Teller distortion, improved air stability, and superior cycling performance. Notably, a reduced interlayer distance ratio ( d (O Na-O) / d (O-TM-O) ) correlates with delayed O3-to-P3 phase transformation and enhanced lattice stability, as confirmed by crystallographic analyses. The synergistic effects of Li/Mn/Al co-doping not only stabilize the host structure but also unlock cationic redox reversibility, offering a pathway to balance energy density and longevity in sodium-based cathodes.
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高影响因子
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