ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 46
·102880-102893
·
IF 5.8
Li Yunhe,Li Hao,Zhao Baogang,Ma Yanming,Liang Peiyuan,Sun Tianjun
The escalating levels of surface ozone concentration pose detrimental effects on public health and the environment. Catalytic decomposition presents an optimal solution for surface ozone removal. Nevertheless, catalyst still encounters challenges such as poisoning and deactivation in the high humidity environment. The influence of support on catalytic ozone decomposition was examined at a gas hourly space velocity of 300 L·g −1 ·h −1 and 85% relative humidity under ambient temperature using Cu-Mn–doped oxide catalysts synthesized via a straightforward coprecipitation method. Notably, the Cu-Mn/SiO 2 catalyst exhibited remarkable performance on ozone decomposition, achieving 98% ozone conversion and stability for 10 h. Further characterization analysis indicated that the catalyst’s enhanced water resistance and activity could be attributed to factors such as an increased number of active sites, a large surface area, abundant active oxygen species, and a lower Mn oxidation state. The catalytic environment created by mixed oxides can offer a clearer understanding of their synergistic effects on catalytic ozone decomposition, providing significant insights into the development of water-resistant catalysts with superior performance. Graphical
研究领域:
环境催化
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大气污染控制
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材料化学
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表面科学
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催化化学
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环境工程
·
功能材料
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yin Xie,Yongcheng Jin,Lan Xiang
The nontoxicity and low cost make LiMn2O4 a competitive cathode material for lithium-ion batteries. LiMn2O4 has a high theoretical capacity (296 mAh g–1) when cycled in the 3 and 4 V regions. However, it displays a low practical capacity (∼120 mAh g–1) because of the unavailability of the 3 V region caused by severe Jahn–Teller distortion. The present work investigated the full utilization of LiMn2O4 in both 3 and 4 V by tuning the nanoscale interfacial properties. Li-rich structures at the surface and interface of the spinel material and nanograin strain were introduced to improve the performances and were achieved by grinding LiMn2O4 and Li2O at 700 rpm for 10 h under an argon atmosphere. The product shows a high initial discharge capacity of 287.9 mAh g–1 at 0.05 C between 1.2 and 4.6 V and retains 83.2% of the capacity after 50 cycles. The nanoscale interfacial structure was clarified by spherical aberration-corrected microscopy and XRD refinement, and complex occupancies of Li and Mn were found at the interface. A correlation between the interfacial properties and electrochemical performance was established, and the improved performance could be attributed to the polycrystalline nature of the material, the unique Li-rich interfacial structure, and the slightly elevated valence state of Mn. The present results may provide insight for further evaluating the complex mechanism of controlling the electrochemical performance of LiMn2O4.
研究领域:
材料科学
·
电化学
·
储能
·
锂离子电池
·
纳米材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2026
·
IF 4.7
Aibo Li,Chen Zhang,Fangyu Jin,Yanqing Ye,Zhengliang Wang,Peng Ren,Qin Wang,Qiang Zhou
Herein, we obtained a zero-dimensional organic-inorganic hybrid halide of C 7 H 18 N 2 MnBr 4 , whose crystal structure has been confirmed by the single-crystal X-ray diffraction. The single-crystal shows intense green emission with a high internal quantum efficiency of 85.0% and an external quantum efficiency 42.1%. Meanwhile, it also exhibits good thermal stability at elevated temperatures. Taking advantage of its efficient blue light absorption and emission, we fabricated two white light-emitting diodes by combining it with commercial K 2 SiF 6 :Mn 4+ or SrAlSiN 3 :Eu 2+ to investigate its potential in backlighting and lighting application. The former with K 2 SiF 6 :Mn 4+ achieves a wide color gamut of 95.8% of National Television System Committee standard. The latter reaches a high color rendering index of 94.2 and a low correlated color temperature of 3562 K. The fabricated C 7 H 18 N 2 MnBr 4 @polydimethylsiloxane flexible transparent scintillation screen further proves its good X-ray scintillation performance with a detection limit of 19.27 μGy/s and a light yield of 14,670 photons/MeV. This work provides convincing experimental evidence for the multifunctional application of organic-inorganic hybrid Mn(II) halides.
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DOI
高影响因子
Materials Today Communications
·
2026
·
IF 4.9
Qinhui Ren,Li Hu,Fuhua Wei,Wei Shang,Min Li,Zhao Liang
The Zn/Mn-MOFs/GO composites were synthesized via a solvothermal method, and their structural characteristics were investigated using XRD, SEM, and FT-IR techniques for the adsorption study of Minocycline and Orange IV. The experimental results show that when the concentration of the minocycline solution is 30 ppm and 150 mg of GO/Zn/Mn - MOF composites is added, the maximum removal rate can reach 94.4%. When the concentration of the Orange IV solution is 30 ppm and 150 mg of GO/Zn/Mn - MOF composites is added, the maximum removal rate can reach 99.7% within 30 min. The influence of pH on the adsorption performance of these composites for Minocycline and Orange IV was thoroughly examined. The adsorption effect is better under acidic conditions. In summary, the Zn/Mn-MOFs/GO composite demonstrates excellent capability in removing Minocycline and Orange IV, offering significant implications for the management of organic pollutants.
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123915
·
IF 7.5
Jumeng Di,Xiaohua Li,Songyu Guan,Wenwen Ma,Wen Li,Jie Gao,Yuzhi Xu,Bing Yu,Hailin Cong
Nanoplastics (NPs) pose severe risks to aquatic environments, and adsorption technology provides a promising strategy for their removal. Metal-organic frameworks (MOFs) are promising adsorbents, but their practical application is limited by insufficient water stability and restricted pore accessibility. To bridge this gap, defect-engineered Al/Mn bimetallic MOFs were synthesized via mild post-synthetic ion exchange. n-Octanoic acid (OA) was employed to modulate the crystallization process of MIL-53(Al), inducing missing linker defects, suppressing excessive crystal growth, and generating mesoporous structure. Subsequently, the partial substitution of terephthalic acid linkers with manganese clusters could introduce additional active sites, alter the surface properties while maintain the overall crystallinity of MOFs. The optimized Mn-0.2-OA maintained high PS removal efficiency under acidic to neutral conditions, with removal efficiencies above 92% over pH 1–7. It also showed good tolerance to representative interference factors, retaining removal efficiencies above 97.5% in the presence of common cations and 89.37% at 40 mg/L humic acid. The adsorption of 500 nm polystyrene microspheres was mainly driven by the synergistic effects of electrostatic attraction, π-π interactions, enhanced hydrophobic affinity, and hierarchical pore structure. Meanwhile, Mn-0.2-OA achieved a Langmuir-fitted maximum adsorption capacity of 849.17 mg/g and exhibited rapid adsorption kinetics, removing 96.4% of PS within 10 min at an initial concentration of 25 mg/L. Regeneration tests further confirmed its acceptable reusability for repeated PS adsorption. This strategy provides a feasible approach for designing efficient and reusable adsorbents for nanoplastic removal from aquatic environments.
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Bo Liu,Yixin Li,Yaohong Yang,Xiaolin Zhang,Jia Huang,Fangyu Xiong,Changwei Shi,Guangsheng Huang,Paul K. Chu
Aqueous magnesium-ion batteries (AMIBs) are promising energy storage systems due to their high safety, abundant resources, and environmental friendliness. Manganese-based spinel cathode materials for AMIBs offer low cost and high theoretical capacity, but tetragonal MgMn 2 O 4 undergoes a tetragonal-to-cubic phase transition during charging and discharging, leading to large volume changes and limiting long-cycle stability. Herein, cation-deficient Mg-Mn spinel (MgMnO 3 ) is designed as the cathode material for AMIBs. During Mg-ion intercalation/de-intercalation, MgMnO 3 maintains the cubic spinel structure, showing a near-zero-strain characteristic with only 1.47% lattice volume variation during cycling. As a result, the optimized MgMnO 3 cathode exhibits a discharge capacity of 65 mAh g −1 with 98.5% capacity retention after 2000 cycles at 500 mA g −1 . In addition, the aqueous full cell comprising the MgMnO 3 cathode and Mg metal anode shows a high specific capacity of 131 mAh g −1 and a median voltage of 1.75 V. The results demonstrate that MgMnO 3 is a promising cathode material for AMIBs and provide insights into the development of high-performance AMIBs.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Chaoqi Shen,Wei Lin,Lulu Liu,Peng Yang,Chenxi Fu,Lianbang Wang
The escalating demand for lithium-ion batteries emphasizes the urgency of developing cobalt- and nickel-free cathodes ascribed to the high cost of these two metals. LiMnxFe1–xPO4 (LMFP) emerges as a promising candidate due to high operating voltage compared to LiFePO4 while suffering from inferior kinetics and cycling instability. This study demonstrates that precise pH control during the solvothermal process is pivotal for optimizing the LMFP/C microstructure and performance; furthermore, the mechanism of morphology evolution along with pH value and reaction duration is summarized. LiMn0.7Fe0.3PO4/C composites synthesized under varied pH conditions were thoroughly characterized and electrochemically evaluated. Results reveal that a moderately acidic environment (pH 4) facilitates the formation of a unique nanoflower architecture composed of (010)-oriented nanosheets with a highly graphitized carbon coating and minimal antisite defects after calcination. This optimal structure endows LiMn0.7Fe0.3PO4/C composite sample LMP/C-P4-24 with superior Li+ diffusion kinetics and charge-transfer efficiency, enabling a high discharge capacity (151.5 mAh g–1 at 1 C), outstanding cycling stability (96.1% retention after 500 cycles), and excellent rate capability (110.3 mAh g–1 at 10 C). In contrast, synthesis at higher pH induces structural disorder and inferior carbon quality with rapid performance degradation. This work establishes pH-mediated structural control as a powerful strategy for high-performance, resource-conscious, Mn-rich LiMn0.7Fe0.3PO4 cathode materials.
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DOI
PubMed
高影响因子
Science Advances
·
2026
·Vol. 12
·期 19
·
IF 13.9
Chuan Li,Xiu Hu,Rong Zhang,Shaoce Zhang,Huilin Cui,Qinshun Nian,Yuwei Zhao,Chunyi Zhi
In 1952, the first commercially alkaline Zn||MnO 2 primary battery was developed, which is based on Mn 4+ /Mn 3+ redox reactions (MnO 2 ↔Mn 2 O 3 ). Subsequently, the single-electron (Mn 3+ /Mn 2+ and Mn 7+ /Mn 6+ ) and two-electron (Mn 4+ /Mn 2+ ) redox reactions of Mn compound (Mn-Comp) were achieved in aqueous Zn-based batteries. After that, however, the new Mn multivalent change redox reaction was no longer observed. In this study, we report a neutral superhydrophilic hydrogel electrolyte that activates a Mn 2+ /Mn 7+ conversion reaction (Mn 2+ ↔MnO 4 − ). This advance is attributed to an expanding electrochemical stability window and high Mn 2+ reaction activity. This enables a discharge plateau of ≥2.2 V in aqueous Zn metal batteries. The high reversibility of Mn 2+ /Mn 7+ conversion reactions during cycling was achieved by incorporating chelation groups in the designed hydrogel electrolyte, which effectively stabilizes the MnO 4 − . The aqueous Zn||Mn-Comp battery with a 2.2-V discharge plateau operates stably for ≥360 hours.
✓ 已验证
DOI
PubMed
高影响因子
AICHE JOURNAL
·
2026
·
IF 4.4
Wenxuan He,Zhixue Teng,Zhifeng Ao,Tiefeng Zhao,Zhigang Shen
Overcoming the enthalpy–entropy compensation effect remains a formidable challenge in chemical upcycling of polyesters. Empirical catalyst designs typically maximize Lewis acidity, lowering activation enthalpy (Δ H ‡) for ester activation but triggering an entropic penalty (Δ S ‡) that retards kinetics. Here, we establish a “moderate acidity” principle that balances these competing thermodynamic demands. Eyring analysis shows that optimal 5% manganese (Mn) doping enables a substantial reduction in Δ H ‡ while mitigating the entropic penalty. Mn-doped zinc oxide (ZnO) catalysts prepared via microfluidic synthesis achieve optimal performance at 5% Mn doping, delivering 100% PET conversion, 94.7% BHET yield, and a space–time yield of 250 g monomer g cat −1 h −1 , twice that of pristine ZnO. Life-cycle and techno-economic assessments demonstrate 3.7-fold lower greenhouse gas emissions and 2.4-fold cost reduction relative to conventional routes. Complete atomic utilization is achieved by valorizing glycolysis mother liquor into high-performance waterborne polyurethanes, establishing a zero-waste circular economy for plastics.
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产品关联
DOI
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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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Xiaodeng Wang,Hongpeng Zhou,Dingke Zhang,Mingyu Pi,Jiajia Feng,Shijian Chen
Developing stable and high-efficiency hydrogen generation electrocatalysts , particularly for the cathode hydrogen evolution reaction (HER), is an urgent challenge in energy conversion technologies. In this work, we have successfully synthesized Mn-doped NiP 2 nanosheets on carbon cloth (Mn-NiP 2 NSs/CC), which behaves as a higher efficient three dimensional HER electrocatalyst with better stability at all pH values than pure NiP 2 . Electrochemical tests demonstrate that the catalytic activity of NiP 2 is enhanced by Mn doping. In 0.5 M H 2 SO 4 , this Mn−NiP 2 NSs/CC catalyst drives 10 mA cm −2 at an overpotential of 69 mV, which is 20 mV smaller than pure NiP 2 . To achieve the same current density , it demands overpotentials of 97 and 107 mV in 1.0 M KOH and phosphate-buffered saline (PBS), respectively. Compared with pure NiP 2 , higher HER electrocatalytic performance for Mn−NiP 2 NSs/CC can be attributed to its lower thermo-neutral hydrogen adsorption free energy , which is supported by density functional theory calculations.
研究领域:
材料科学
·
电化学
·
能量转换
·
纳米材料
·
催化
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Wanyun Li,Bangchuan Zhao,Jin Bai,Hongyang Ma,Peiyao Wang,Yunjie Mao,Shuai Lin,Xiaoguang Zhu,Xuebin Zhu,Yuping Sun
Lithium rich manganese based materials (LMR) have promised the likeliest candidate for next generation lithium-ion battery cathodes owing to its high energy density and low materials cost. However, severe capacity decline and voltage decay hinder their practical application, which is closely concerned with the structure degradation and irreversible oxygen release. Herein, a simple strategy to reinforce the structural stability of LMR materials by constructing heterostructure with Nb-based MXenes (Nb 2 CT x / Nb 4 C 3 T x ) is proposed. A small amount of spinel phase and pseudo-bonding between Nb and O ions as well as extra oxygen vacancies can be induced by the MXenes addition in LMR, effectively inactivating the surface oxygen and suppressing the structure distortion. In addition, MXene can also alleviate the volume change during cycling process and provide additional transport channels for electrons. The ably designed 3 wt% LMR/Nb 2 CT x cathode presented high initial Coulombic efficiency of 85.6% at 0.1C (vs. 77.4% for the pristine material) and excellent cycling performance with a capacity retention of 83.8% after 200 cycles at 0.5C (vs. 66.6% for the pristine material). This work sheds some light on stabilizing the structure of lithium-rich manganese materials and provides a new idea for the design of other high performance cathode materials.
研究领域:
材料科学
·
电化学
·
储能技术
·
锂离子电池
·
纳米材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）