APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Xue Cui,Hongbin Yu,Yunhe Gong,Xinhong Wang,Ying Lu,Gang Zhang
A novel core-shell heterojunction photocatalyst Ta 3 N 5 @FeTaO 4 /Mn x O y was designed for efficient persulfate activation to enhance the photocatalytic performance. Ta 3 N 5 @FeTaO 4 /Mn x O y was synthesized using a two-step impregnation-calcination method, and tetracycline was selected as the model pollutant. The results indicated that the tetracycline degradation by Ta 3 N 5 @FeTaO 4 /Mn x O y was 3.79 and 13.42 times faster than those by Ta 3 N 5 @FeTaO 4 and Ta 3 N 5 , respectively. Pollutant degradation via radicals (·OH, SO 4 · − and O 2 · − ) and non-radicals (Fe(IV) and 1 O 2 ) was verified by probe tests, quenching experiments, and EPR analysis. The homologous growth heterojunction promoted the separation of charge carriers owing to the matched structure and seamless interface between Ta 3 N 5 and FeTaO 4 . The loaded Mn x O y enhanced persulfate adsorption and facilitated Fe 3+ /Fe 2+ cycling, consequently improving persulfate activation and the photocatalytic degradation of pollutants. This study reveals the often-overlooked role of iron-based catalysts to generate a wider range of reactive species, offering a new perspective to design Fenton-like photocatalytic materials.
研究领域:
环境科学
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催化材料
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
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2025
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IF 3.3
Xiaoyue Wang,Rajapriya Andavar,Jiahong Xie,Wenli Liu,Yanzhi Sun,Yongmei Chen,Yang Tang,Pingyu Wan,Junqing Pan
Advanced, efficient, and eco-friendly technologies are essential for the safe recycling of spent lead-acid batteries for minimizing their environmental impact by mitigating toxic wastes and promoting resource sustainability by recovering valuable lead. Herein, we proposed a simple, zero-emission electrochemical strategy to recover metallic lead via the direct electrolysis of lead-acid batteries. MnxOy@RuO2 with a layered structure of stacked nanosheets was prepared via facile hydrothermal and annealing methods. MnxOy@RuO2 exhibited low overpotentials of 175 mV and 248 mV at a current density of 10 mA cm−2 in 0.5 mol L−1 H2SO4 and Pb(MSA)2, respectively, showcasing its excellent OER activity. Notably, the catalyst exhibited excellent stability for over 10 hours. The MnxOy@RuO2 catalyst during constant current electrolysis required an overpotential of only 375.6 mV at 25 mA cm−2 to function, greatly reducing the precipitation of PbO2. MnxOy@RuO2 facilitated high-efficiency oxygen evolution reaction using the lead MSA electrolyte, suppressing the PbO2 formation and reducing the anode overpotential, making it an ideal anode material for energy-efficient lead recovery.
研究领域:
电化学
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材料科学
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环境科学
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能源技术
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可持续资源回收
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
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2025
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IF 16
Yilin Yang,Ning Wang,Zhihua Wang,Fei Yan,Zhan Shi,Shouhua Feng
Despite the potential of sonodynamic therapy (SDT) in treating malignant tumors, the lack of effective sonosensitizers has limited its clinical implementation. In this study, we explored the relationship between the heteroatom doping concentration in metal–organic frameworks and interface formation after pyrolysis by regulating the addition of manganese sources and successfully derived Z-scheme heterojunctions MnxOy/(A/R)TiO2 (MTO) in situ from MIL-125-NH2 (Ti/Mn). The electron transfer pathway introduced by interfacial contact promoted carrier separation and greatly preserved the effective redox components, significantly influencing the performance of reactive oxygen species generation. Upon reaching the tumor sites, MTO effectively depleted glutathione to alleviate the suppressive tumor environment, and the heterojunctions and MnxOy in MTO facilitated SDT and synergistic chemodynamic therapy (CDT), respectively, leading to enhanced immunogenic cell death (ICD). Furthermore, Mn2+ uptake by dendritic cells (DCs) and the tumor-associated antigens released due to ICD activated the stimulator of interferon genes pathway, which elicited a robust tumor-specific immune response by driving the maturation of DCs and the activation of T cells. In addition, the activated T cells secreted high levels of interferon-γ to enhance Mn3+/Mn2+-mediated ferroptosis in metastatic tumor cells. The combination of MTO-mediated synergistic therapy and PD-L1 checkpoint blockade exhibited vaccine-like functions, inducing stronger systemic immunity and durable immune memory to inhibit tumor progression, metastasis, and recurrence. To summarize, we synthesized a self-enhancing nanoplatform for synergistic SDT/CDT/immunotherapy using multifunctional MOF-derived Z-scheme heterojunctions. This study provides an experimental basis for amplifying the potential of sonosensitizers while optimizing SDT-mediated systemic immunity while avoiding interference caused by additional adjuvants.
研究领域:
癌症治疗
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纳米技术
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材料科学
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免疫学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
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2024
·Vol. 14
·期 11
·758
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IF 3.8
Yujuan Li,He Guo,Hu Li,Tiecheng Wang
Dye wastewater is characterized by high salinity, intense coloration, difficulty in degradation, and complex organic compositions, posing significant environmental risks. Manganese oxide (MnxOy)-based materials have been widely used for the removal of recalcitrant organic pollutants in water environments. In this study, various MnxOypolymorphs were prepared, and their catalytic activities for persulfate (PS) activation were evaluated using Orange II (AO7) as a model molecule. After 50 min treatment, the degradation efficiency of AO7 ranked asα-MnO2/PS >γ-MnO2/PS >β-MnO2/PS > Mn2O3/PS, withα-MnO2/PS achieving the highest efficiency of 98.6%. XPS, XRD, and electrochemical analyses indicated thatα-MnO2exhibited an exceptional crystal structure and performance. Theα-MnO2/PS system exhibited a strong pH adaptability across a wide pH range of 3.0–9.0. The presence of coexisting anions at 0.1 mM, including Cl−, NO3−, CO32−, and SO42−, slightly reduced the degradation rate of AO7. The reactive oxygen species, mainly SO4•−and1O2, predominantly destroyed the naphthalene ring structure of AO7. Furthermore,α-MnO2exhibited an excellent stability, allowing for multiple reuse cycles without interference from common anions in water, highlighting its strong potential for practical applications. These results provided insights into the environmental fates of AO7 in theα-MnO2/PS system.
研究领域:
环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
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2022
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IF 4.119
Zhengchen Li,Yanhua Wang,Shuang Zheng,Peng Qian,Xiaomeng Zhang,Peiwei Han,Yubo Tu,Shufeng Ye
Currently, the increasingly severe pollution of organic wastewater from dyes and antibiotics has become one of the major causes for the deterioration of the water environment. In this work, nanosheets-Mn x O y anchored biochar (Mn x O y @BEP) obtained from the marine polluting algae Enteromorpha was synthesized by a hydrothermal method, which exhibited extraordinary adsorption performance for tetracycline (TC) and methyl blue (MB). Nanosheets-Mn x O y was grown in situ on the surface of biochar by pyrolysis of KMnO 4 , and the Mn x O y @BEP composite had a micronano hierarchical structure, a larger specific surface area (208.735 m 2 g −1 ) and more abundant active adsorption sites. Because of these characteristics, the Mn x O y @BEP composite was endowed with excellent performance of organic pollutants in aqueous solution, which exhibited a high equilibrium adsorption capacity for TC (102.25 mg g −1 ) and MB (798.8 mg g −1 ), a rapid adsorption rate for MB (within 6 min) and selective adsorption properties at controllable pH. The experimental data of MB and TC was better fitted to the Langmuir isotherm model and pseudo-second-order kinetic model. Furthermore, the adsorption mechanism mainly involves electrostatic interactions, π-π interactions, hydrogen bonding, steric hindrance, etc. In addition, three cycles of adsorbent regeneration via 1.0 M NaOH solution displayed additional attractiveness. Therefore, the Mn x O y @BEP composite material not only contributes to the management of Enteromorpha pollutants but can also be regarded as an extraordinary candidate for the removal of dye and antibiotic water.
研究领域:
环境科学
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水处理
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2015
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IF 2.587
Z. B. Huang,B. S. Liu,X. H. Wang,X. Y. Tang,R. Amin
In order to improve the desulfurization efficiency of 50% MnxOy/MCM-48 sorbent, the preparation parameters including synthesis method (excessive impregnation, precipitation, and sol–gel), precursor selection (Mn(Ac)2 and Mn(NO3)2), heating rate during calcination (2°/min, 4°/min, 6°/min, and 8°/min), and calcination temperature (450 °C, 550 °C, 650 °C, and 750 °C) of sorbents were investigated systematically. The structure and composition of different sorbents were characterized by XRD, BET, TG/DSC, H2-TPR, UV–vis, TPSR, and FT-IR techniques. The results indicated that synthesis methods and precursors influenced remarkably the dispersion of active particles while the stable structure of MCM-48 and the dispersion of active particles correlated closely with the heating rate during calcination and calcination temperature of sorbents, which will influence the desulfurization efficiency of sorbents. Therefore, the better dispersion of active particles and integrity of MCM-48 structure will result in better desulfurization performance of sorbents. Thus, the best condition was the calcination temperature of 550 °C with a heating rate of 2°/min using Mn(Ac)2 as precursor by a sol–gel method.
研究领域:
环境化学
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材料科学
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化学工程
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能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2021
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IF 8.067
Yue Liu,Xuehua Liu,Xinyu E,Bingbing Wang,Zirui Jia,Qingguo Chi,Guanglei Wu
The fabrication of high-performance electromagnetic (EM) wave absorption (EMA) materials is an effective strategy to deal with ever-increasing EM pollution. In this work, a series of manganese oxides/porous carbon (Mn x O y @C) hybrid composites are obtained by a two-step process. It is revealed that different manganese oxides play various influence on the dielectric properties of absorbers. Owing to the moderate complex permittivity of MnO@C hybrid composites, the optimal reflection loss could reach as high as -76.0 dB at the matching thickness of 2.0 mm with 5.2 GHz of effective absorption bandwidth at thickness of 2.1 mm. We demonstrated that the addition of porous carbon is vital for enhancing EMA performance of composites, which not only coordinates impedance matching allowing more EM waves enter the absorber, but also provides the path for electron movement, thus profiting conductive loss. Besides, different heterogeneous interfaces including porous carbon, manganese oxide and so on, are conducive to contribution of interface polarization. The most noteworthy is ingenious design of composite materials and systematic research of EM energy attenuation mechanism in this work will provide the possibility to realize high-performance EMA.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
BIOMASS & BIOENERGY
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2025
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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.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2018
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IF 4.908
Haifeng Li,Sheng Su,Song Hu,Kai Xu,Long Jiang,Yi Wang,Jun Xu,Jun Xiang
A series of Mn x O y /Al 2 O 3 sorbents with different tissue and chemical structures were prepared by repeated incipient wet impregnation method with different calcination conditions, including calcination temperature from 500 °C to 900 °C and calcination time from 3 h to 9 h. The H 2 S absorption performances of the prepared sorbents were investigated by a model synthesis gas containing 2000 mg/m 3 H 2 S at 850 °C. The chemical and physical structures of the samples were characterized by Brunauer–Emmett–Teller, X-ray diffraction and scanning electron microscopy techniques to obtain fundamental information about the deactivation of Mn x O y /Al 2 O 3 sorbents during desulfurization–regeneration cycles. Results showed that the structural features of the sorbents at high reaction temperature played an important role in the stability of desulfurization performance. The analysis of the characteristics of the sorbents indicated that the sorbents obtained stabilized chemical and physical structures during desulfurization–regeneration cycles when the calcination temperature was 900 °C and the calcination time was above 6 h. The sorbent suffered serious deactivation during five successive desulfurization–regeneration cycles when the calcination temperature of sorbents was below 850 °C. The sulfur capacity decreasing of Mn x O y /Al 2 O 3 sorbents may probably be attributed to a part of Mn x O y covered by Al 2 O 3 , which can un-sulfide during adsorption process. The coverage of active phase Mn x O y may be caused by the shrinking and disappearing of some micropores, and phase transformation of Al 2 O 3 , as well as the transformation of MnAl 2 O 4 lead to a part of Mn x O y on the sorbents being covered by alumina.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
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