CHEMISTRY-A EUROPEAN JOURNAL
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2022
·Vol. 28
·期 54
·e202201687
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IF 5.02
Jiaqi Ke,Yufei Zhang,Yibo Zhang,Minghui Ye,Zicheng Zhang,Yongchao Tang,Xiaoqing Liu,Cheng Chao Li
Rechargeable zinc-ion batteries (ZIBs) are potential for grid-scale applications owing to their safety, low price, and available sources. The development of ZIBs cathode with high specific capacity, wide operating voltage window and stable cyclability is urgently needed in next-generation commercial batteries. Herein, we report a structurally crystalline-stable Mn(VO 3 ) 2 nanobelts cathode for ZIBs prepared via a facile hydrothermal method. The as-synthesized Mn(VO 3 ) 2 exhibited high specific capacity of 350 mAh g −1 at 0.1 A g −1 , and maintained a capacity retention of 92 % after 10,000 cycles at 2 A g −1 . It also showed good rate performance and obtained a reversible capacity of up to 200 mAh g −1 after 600 cycles at 0.2 A g −1 under −20 °C. The electrochemical tests suggest that Mn(VO 3 ) 2 nanobelts impart fast Zn 2+ ions migration, and the introduction of manganese atoms help make the structures more indestructible, leading to a good rate performance and prolonged cycle lifespan. Graphical The crystalline-stable Mn(VO 3 ) 2 nanobelts cathode presents the specific capacity of 350 mAh g −1 at 0.1 A g −1 and maintain a capacity retention rate of 92 % for 10,000 cycles at a current density of 2 A g −1 . It also rendered good rate performance and obtained a reversible capacity of up to 200 mAh g −1 after 600 cycles at 0.2 A g −1 even under −20 °C. Benefiting from the unique tunnel type nanobelts structure, the Mn(VO 3 ) 2 nanobelts show high Zn 2+ migration kinetics and stable framework for reversible ions de-/insertion.
研究领域:
储能技术
·
材料科学
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电化学
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 8
·118152
·
IF 6.2
Ziqin Lin,Tianxia Xie,Zhuolin Xie,Anqi Dai,Yang Yuan,Peng Sun,Yanqi Song,Zhenggang Fang,Chunhua Lu
Solar absorbers are vital for concentrated solar power (CSP) systems, yet spectral selectivity solar absorbers (SSAs) struggle with high-temperature stability in air. This study introduced Mn ions into MgTiO 3 (MTO) via a high temperature solid-phase synthesis technique to optimize the spectral selectivity. Unlike conventional doping that increased both absorptance and emittance, MgTi 0.4 Mn 0.6 O 3 (MTMO-0.6) boosted solar absorptance (α = 0.85) while maintaining low emittance (ε = 0.39, 1073.15 K) in the 2.5–15 μm wavelength range. Besides, the material retained high spectral selectivity (α/ε = 0.84/0.41) after heat treatment at 800 °C in air atmosphere for 90 h in total (9 h cycles −1 , 10 cycles), showing excellent thermal stability. Moreover, under concentrated solar irradiation of 10.83 W·cm −2 , MTMO-0.6 sample reached an equilibrium temperature of 848 ℃, surpassing that of MTO and SiC. The proposed Mn-doped MgTiO 3 has the potential as a solar absorber for high temperature solar thermal conversion.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2026
·
IF 3.7
Yuhuan Lin,Linlin Su,Wei Hu,Ziyan Niu,Min Xu,Li Dai,Yutao Gao,Gang Yang,Lulu Long
The persistent challenge of antibiotic contamination in water necessitates efficient catalytic systems for peroxymonosulfate (PMS)-based advanced oxidation processes. While cobalt-based catalysts derived from ZIF-67 metal-organic frameworks and conventional core-shell structures like SiO 2 coatings offered limited physical encapsulation, they failed to prevent intra-particle agglomeration and adequately suppress Co ions leaching. Drawing inspiration from the dual-shell defense mechanism of the nacre structure, which combined physical and chemical mechanisms, this study constructed a Co 3 O 4 /C@MnSiO 3 (CCMS) nacre-mimetic nanostructured catalyst by converting the mesoporous SiO 2 on the surface of ZIF-67 into MnSiO 3 . The unique architecture effectively suppressed nanoparticle aggregation within individual ZIF-67 through physical encapsulation and bimetallic interaction, dispersed the active sites, reduced Co 2+ leaching, and enhanced catalytic activity. Compared to Co 3 O 4 /C (CC) and Co 3 O 4 /C@SiO 2 (CCS), the CCMS/PMS system significantly improved tetracycline degradation (1.4 and 2.3 times higher kinetic constants) and maintained 75% removal efficiency after five cycles. This study constructed a nacre-mimetic structure achieving highly efficient and stable catalysis, meanwhile providing novel strategies for optimizing MOF-based catalytic materials.
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PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
·
2016
·
IF 0.723
Lili Liu,Jianglei Hu,Jiaojiao He,Haojie Lu,Yong Xu,Fengwei Shi
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WATER SCIENCE AND TECHNOLOGY
·
2015
·Vol. 72
·期 5
·696-703
·
IF 1.106
Liu Yanfang,Zhao Junna,Li Zaixing,Li Guixia,Li Wei,Gao Xiang
Mixed manganese and cerium oxide supported on HZSM-5 were synthesized and used as heterogeneous catalysts for ozonation of bisphenol A (BPA) in aqueous solution. The prepared catalysts of Mn-Ce/HZSM-5 were characterized by X-ray diffraction, scanning electron microscopy and Fourier transform-infrared spectroscopy. The results indicated that Mn-Ce/HZSM-5 exhibits extraordinary catalytic activity for the degradation of BPA. Removal of 89.3% of BPA and 90.4% of total organic carbon (TOC) was achieved in 30 min, compared to non-catalytic ozonation, where only 50.5% BPA and 28.1% TOC removal were reached under the same conditions. Adsorption of BPA on HZSM-5 support and Mn-Ce/HZSM-5 catalysts was negligible. The strong inhibition of BPA removal by tert-butyl alcohol indicated that the attack of hydroxyl radicals was responsible for the improvement of catalytic ozonation. It was observed that at neutral pH, which is near the point of zero charge of the catalyst, the catalytic activity reached its maximum. Increasing the amount of Mn-Ce/HZSM-5 catalyst until it exceeded 3 g/L did not show a strong effect on BPA removal. The catalysts showed high stability and reusability.
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WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 10
·596
·
IF 3.5
Wang Shu,Tian Lijiang,Zhai Zhenyu,Zhang Jie,Pan Fan,Wang Minqi,Zong Mengchen
Fe-based Metal–Organic Frameworks (MOFs) show promise as heterogeneous Fenton-like catalysts; however, in the removal of hydrophobic VOCs, traditional wet Fenton systems suffer from slow Fe 3+ /Fe 2+ cycling and high gas–liquid mass transfer resistance, severely limiting their industrial application. To address these challenges, this study proposes a dual optimization strategy. Specifically, a gas-phase H 2 O 2 Fenton-like system was constructed to overcome mass transfer limits, and multivalent Mn was introduced into the MIL-100(Fe) to accelerate the Fe 2+ /Fe 3+ cycle. Among the synthesized catalysts, MIL-100(Fe 4 Mn 1 ) (4FM) exhibited superior catalytic performance, achieving 85% toluene degradation efficiency and a capacity of 87.17 μg C 7 H 8 /(g·min)) under optimized conditions, significantly outperforming its monometallic counterparts. Characterization results reveal that 4FM retains an ordered crystalline structure with highly dispersed active sites and an optimized pore architecture. Mechanistic studies indicate that Fe–Mn synergy induces an “electron pump” effect, utilizing the thermodynamic potential differences to accelerate the reduction of Fe 3+ to Fe 2+ . Concurrently, the system establishes dual reaction centers (Fe and Mn), where efficient Mn 2+ /Mn 3+ /Mn 4+ and Fe 2+ /Fe 3+ redox cycles facilitate sustained gaseous H 2 O 2 activation into hydroxyl radicals (·OH), promoting efficient toluene degradation. This study provides a promising strategy utilizing gas-phase Fenton-like catalytic technology to overcome kinetic and mass transfer bottlenecks in degrading of hydrophobic VOCs. Graphical
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Applied Materials Today
·
2026
·
IF 7
Weixiao Gong,Zhendong Liu,Zheng Wang,Yannan Jia,Guanghui Lu,Lu Li,Xiaoqin Li,Junchi Zhang,Haichen Cui,Yuanxiang Shan,Wanting Feng,Hongqin Xue
FeMn-HATP was synthesized as an efficient Sb(III) adsorbent. • Synergistic oxidative adsorption by FeMn-HATP enhances Sb(III) removal efficiency. • Kinetic, isotherm, and thermodynamic studies investigated FeMn-HATP adsorption. • An Sb(III) degradation mechanistic pathway is proposed. • FeMn-HATP demonstrated excellent regeneration performance in fixed-bed column tests. An affordable, environmentally friendly, simple adsorbent for Sb(III) removal from aqueous solutions was prepared using attapulgite (ATP) as the matrix, and FeSO 4 and KMnO 4 as metal precursors, through an in situ precipitation approach. The morphology, pore structure, and surface chemical properties of the material were analyzed using various characterization techniques. The results indicate that the iron-manganese bimetallic-modified acid-activated ATP (FeMn-HATP) surface is loaded with relatively uniformly distributed iron and manganese components, and its specific surface area and pore structure differ significantly from the original ATP. These changes promote pollutant molecule diffusion and contact. In batch adsorption experiments, FeMn-HATP achieved good Sb(III) removal performance and remained relatively stable within a pH range of 4 −10. The material maintained a relatively stable adsorption capacity even in the presence of high concentrations of other anions. Adsorption of Sb(III) by the modified ATP better conforms to both Elovich kinetic and Langmuir isotherm models, with a theoretical maximum adsorption capacity of 102.79 mg/g at 318.15 K. Fixed-bed cycling experiments demonstrated that FeMn-HATP retained significant adsorption capacity after five NaOH regenerations, with a dynamic adsorption capacity of 14.68 mg/g and a regeneration efficiency of 68.16%. Overall, FeMn-HATP exhibits good potential for Sb(III) removal with a degree of reusability, indicating promise for the treatment of antimony-containing wastewater. Download: Download high-res image (262KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Huajing Zhou,Yuanxin Huang,Wenbo Zhao,Lingxiang Zhao,Sai Tian,Tiancheng Li,Liang He
Lattice oxygen defects promote efficient oxidant activation • Iron and manganese sites drive singlet oxygen dominated oxidation • Rapid antibiotic degradation achieved in real water matrices • Catalyst shows low metal leaching and good cycling stability • Treated effluents show low ecological risk in seed germination tests Enhancing the activation efficiency of peroxymonosulfate (PMS) to generate reactive oxygen species (ROS) is crucial for boosting Fenton-like reactions. However, simultaneously promoting PMS adsorption, accelerating interfacial electron transfer, and shifting the activation pathway to optimize its activation kinetics still poses a substantial challenge. Herein, we developed a bimetallic catalyst enriched with lattice oxygen defects, denoted as Fe 14 Mn 1 -LOx, for PMS activation toward the remediation of emerging organic contaminants in aquatic environments. Combined experimental and theoretical mechanistic studies reveal that the intrinsic catalytic activity of Fe 14 Mn 1 -LOx originates from the intermetallic lattice oxygen defects (Fe-O latt -Mn). These defects significantly elongate the O O bond of adsorbed PMS and drastically lower its dissociation energy to 5.79 kJ mol −1 . Furthermore, the Fe-O latt -Mn sites increase the electron density near the Fermi level and adopt a bidentate coordination configuration, enabling faster and more efficient electron transfer to the O O bond, thereby promoting the generation of radical and non-radical species, predominantly singlet oxygen ( 1 O 2 ) with a contribution as high as 97.4%. Benefiting from these merits, the Fe 14 Mn 1 -LOx catalyst exhibits an exceptional degradation rate constant of 0.513 min −1 for tetracycline (TC), a representative emerging contaminant. This rate is 3.72 and 24.4 times higher than those of pristine FeOx (0.138 min −1 ) and MnOx (0.021 min −1 ), respectively. Remarkably, complete TC removal (100%) is achieved within just 10 min, outperforming most reported analogous catalysts. This work underscores the critical role of precisely engineering intermetallic lattice oxygen defects to modulate heterogeneous PMS activation, offering an innovative catalyst design strategy for efficient deep purification of emerging contaminants in real water matrices. Download: Download high-res image (263KB) Download: Download full-size image
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xiangyu Zi,Xiaolong Sun,Fengwei Yin,Jia Gao,Jie Huang,Yingying Zhang,Yao Chen,Yongqian Fu
MOFs represent a promising platform for enzyme immobilization, yet the development of tailored strategies to accommodate both enzyme properties and MOF structures remains a challenge. In this study, we employed chitosanase BCC1 as a model enzyme and integrated Fe 2+ /Mn 2+ ions into the ZIF-8 to construct a bimetallic MOF-based immobilization system (BCC1@Fe/Mn-ZIF-8). Comprehensive characterization by SEM, FTIR, TGA confirmed the successful immobilization and structural integrity of the composite. The immobilized enzyme retained 97 % of its initial activity and exhibited enhanced stability under harsh thermal, pH, and solvent conditions. Notably, BCC1@Fe/Mn-ZIF-8 maintained 117 % activity after 14 days at 4 °C and 72 % residual activity after 14 reuse cycles, indicating excellent storage and reusability. This bimetallic MOF-based strategy offers a robust and efficient approach for enzyme immobilization, with strong potential in industrial biocatalysis.
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PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 5
·827
·
IF 5.3
Shiming Yang,Santosh K. Tiwari,Zhiqi Zhu,Dehua Cao,Huan He,Yu Chen,Kunyapat Thummavichai,Nannan Wang,Mingjie Jiang,Yanqiu Zhu
The slow kinetics of the oxygen evolution reaction (OER) is one of the significant reasons limiting the development of electrochemical hydrolysis. Doping metallic elements and building layered structures have been considered effective strategies for improving the electrocatalytic performance of the materials. Herein, we report flower-like nanosheet arrays of Mn-doped-NiMoO4/NF (where NF is nickel foam) on nickel foam by a two-step hydrothermal method and a one-step calcination method. The doping manganese metal ion not only modulated the morphologies of the nickel nanosheet but also altered the electronic structure of the nickel center, which could be the result of superior electrocatalytic performance. The Mn-doped-NiMoO4/NF electrocatalysts obtained at the optimum reaction time and the optimum Mn doping showed excellent OER activity, requiring overpotentials of 236 mV and 309 mV to drive 10 mA cm−2(62 mV lower than the pure NiMoO4/NF) and 50 mA cm−2current densities, respectively. Furthermore, the high catalytic activity was maintained after continuous operation at a current density of 10 mA cm−2of 76 h in 1 M KOH. This work provides a new method to construct a high-efficiency, low-cost, stable transition metal electrocatalyst for OER electrocatalysts by using a heteroatom doping strategy.Keywords:OER;Mn-doped;transition metal electrocatalyst;nanosheet
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JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Wenhua Tong,Xinhang Du,Jiepeng Wang,Hao Yan,Tonghui Xie,Yabo Wang,Yongkui Zhang
Organophosphate esters (OPEs) waste is difficult to dispose effectively because of its stability and the potential risk of P element. In this study, taking one typical organic extractant of tributyl phosphate (TBP) as an example, we proposed a strategy to treat OPEs inspired by chemical looping combustion (CLC) technology—oxygen carrier immobilization process (OCIP), aiming at efficient TBP degradation and simultaneous P immobilization. Adopting Fe-Mn bimetallic oxide (FMBO) as oxygen carrier, an almost 100% P immobilization efficiency was achieved under recommended conditions which were obtained by response surface methodology . Meanwhile, gaseous products released from TBP degradation, e.g., non-methane hydrocarbon, was lower than the maximum allowable emission concentration limit. Further characterizations implied that P-species released from reaction process were mainly immobilized as stable inorganic forms of metaphosphate, phosphate and pyrophosphate. On the basis of identifying degradation intermediates, we proposed a possible degradation pathways. FMBO as an oxygen carrier provided sufficient oxygen molecules for flameless combustion of OCIP process. Electron paramagnetic resonance measurement confirmed the existence of oxygen vacancies on FMBO surface, which contributed to the formation of •O 2 − . Oxidation by oxygen molecules and •O 2 − attack resulted in the degradation and mineralization of TBP, with simultaneously achieving P stabilization.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 18
·8744-8750
·
IF 3.3
Jiahao He,Junyou Wu,Yujie Zhang,Qin Yang,Yingchun Yang
In recent years, the abuse of antibiotics has brought a great environmental problem. Therefore, it is important to develop highly efficient technology for treating antibiotic pollutants. Herein, Mn-doped zeolitic imidazolate framework-67 (Mn-ZIF67) nanocrystals were prepared using a modified solvothermal method and then characterized by various techniques. The prepared Mn-ZIF67 was applied to activate peroxymonosulfate (PMS) for the degradation of norfloxacin (NOR). The degradation results illustrated that a removal rate of 85% and a mineralization rate of 42% were achieved in the degradation of NOR within 30 min under the optimized reaction conditions. Additionally, free radical quenching experiments proved that the main active substance in the reaction system was SO4˙−. Besides, the material exhibits good recycling performance and can achieve a 70% NOR degradation rate after 5 cycles. According to the degradation intermediates detected by LC-MS, three possible degradation pathways of NOR were inferred. This work proves that Mn-ZIF67 has a good catalytic effect and it could be considered as a new and perspective material for organic wastewater treatment.
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