Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Zhai Jianxin,Xia Zhanghui,Zhou Baowen,Wu Haihong,Xue Teng,Chen Xiao,Jiao Jiapeng,Jia Shuaiqiang,He Mingyuan,Han Buxing
Upcycling of CO 2 into fuels by virtually unlimited solar energy provides an ultimate solution for addressing the substantial challenges of energy crisis and climate change. In this work, we report an efficient nanostructured Ru/MnO x catalyst composed of well-defined Ru/MnO/Mn 3 O 4 for photo-thermal catalytic CO 2 hydrogenation to CH 4 , which is the result of a combination of external heating and irradiation. Remarkably, under relatively mild conditions of 200 °C, a considerable CH 4 production rate of 166.7 mmol g −1 h −1 was achieved with a superior selectivity of 99.5% at CO 2 conversion of 66.8%. The correlative spectroscopic and theoretical investigations suggest that the yield of CH 4 is enhanced by coordinating photon energy with thermal energy to reduce the activation energy of reaction and promote formation of key intermediate COOH* species over the catalyst. This work opens up a new strategy for CO 2 hydrogenation toward CH 4 .
研究领域:
化学
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材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Hongguang Zhang,Zi Yu,Yongxin Liang,Tao Gan,Zuqiang Huang,Huayu Hu,Yanjuan Zhang
The utilization of organic molecules as in-situ hydrogen donors for producing γ-valerolactone (GVL) biofuel from biomass-derived levulinic acid (LA) represents one of the promising sustainable approaches. However, this process still faces challenges, including the difficult activation of the hydrogen source and the transport limitations of active hydrogen species. Herein, a Co-MnO/spontaneously polarized ceramic-carbon (Co-MnO/SPCE-C) composite catalyst, featuring a unique spontaneous polarization effect, was developed for catalytic transfer hydrogenation (CTH) of LA to GVL in the isopropanol/H 2 O (volume ratio = 1/19) cosolvent system. Co-MnO/SPCE-C contributed to an outstanding LA conversion of 99.9% and a favorable GVL yield of 93.5%, surpassing the performance achieved by comparative catalysts. Various characterization techniques demonstrate that SPCE with far-infrared emission and surface electric field increased the oxygen vacancies, thereby promoting hydrogen spillover and enhancing the properties of CoO x –MnO acidic sites. The 17 O NMR spectra reveal that SPCE activated water clusters by weakening the hydrogen bonding network. Moreover, D 2 O experiments show that SPCE facilitated the participation of water in the reaction. This work provides valuable insights into the development of an efficient strategy for producing GVL from LA. Before the catalyst can be considered for commercial applications, the focus in the future should be on a comprehensive computational analysis, long-term evaluation of catalyst stability, and additional industrial-scale testing.
研究领域:
化学工程
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材料科学
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催化反应
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 8
·1370
·
IF 5.719
Cong Tian,Zhe Tang,Yike Hou,Asim Mushtaq,Shafaq Naz,Zhangsen Yu,Jabeen Farheen,Muhammad Zubair Iqbal,Xiangdong Kong
Significant attention is paid to the design of magnetoplasmonic nanohybrids, which exploit synergistic properties for biomedical applications. Here, a facile method was employed to prepare plasmonic magnetic Au-MnO heterostructured hybrid nanoparticles for imaging-guided photothermal therapy of cancers in vitro, with the view to reducing the serious drawbacks of chemotherapy and gadolinium-based contrast agents. The biocompatibility of the prepared Au-MnO nanocomposites was further enhanced by Food and Drug Administration (FDA)-approved triblock copolymers Pluronic®F-127 and chitosan oligosaccharide (COS), with complementary support to enhance the absorption in the near-infrared (NIR) region. In addition, synthesized[email protected]nanocomposites exhibited promising contrast enhancement in T1MR imaging with a good r1relaxivity value (1.2 mM−1s−1), demonstrating a capable substitute to Gd-based toxic contrast agents. In addition, prepared[email protected]hybrid nanoparticles (HNPs) produced sufficient heat (62 °C at 200 μg/mL) to ablate cancerous cells upon 808 nm laser irradiation, inducing cell toxicity, and apoptosis. The promising diagnostic and photothermal therapeutic performance demonstrated the appropriateness of the[email protected]HNPs as a potential theranostic agent.Keywords:plasmonic nanoparticles;magnetic nanocomposites;T Magnetic contrast agents;photothermal therapy;cancer theranostics
研究领域:
纳米技术
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生物医学工程
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材料科学
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癌症研究
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诊疗学
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Xiang Li,Danwen Guo,Shanying He,Jiahao Kang,Yijuan Zhao,Shaohua Wu,Chunping Yang
Peroxymonosulfate-based advanced oxidation processes (PMS-based AOPs) via nonradical pathways have attracted close attention due to their excellent anti-interference properties and high selectivity in degrading organic pollutants from wastewater. However, the highly efficient production of nonradicals for PMS activation remains challenging, especially for recalcitrant organic pollutants such as tetracycline (TC) in complex aqueous matrices. Here, MnO and nitrogen-doped carbon catalysts were synthesized using NH 4 Cl modified strategy. The performances and mechanisms of TC degradation were evaluated, and toxicity of the system was also assessed. Results showed that the system achieved 86.7 % removal of TC within 30 min with a rate constant of 0.1713 min −1 . This system demonstrated effective TC degradation across a broad pH range (3.0–10.5) while exhibiting resistance to diverse anionic interferences in aqueous matrices. Characterization data showed that NH 4 Cl calcination led to a hierarchical porous structure with optimized MnO dispersion and nitrogen functionality in the carbon support, further significantly enhancing nonradicals generation through PMS activation. The key active sites were identified as Mn-N X sites, graphitic nitrogen, and C-O/C-N groups. Quenching experiments and ESR tests indicated that electron transfer and Mn(V) played the major role in TC degradation, followed by singlet oxygen ( 1 O 2 ). Based on LC-MS analysis of intermediates, three primary TC degradation pathways were identified: hydroxylation-driven ring-opening, oxidative demethylation/deamination, and oxidative ketonization. Toxicity assessment via the Toxicity Estimation Software Tool confirmed a significant reduction in ecotoxicity throughout these pathways. These data could be referred for the optimization of PMS-based AOPs in wastewater treatment.
研究领域:
环境科学
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催化
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化学工程
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水处理技术
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毒理学
✓ 已验证
产品关联
DOI
高影响因子
Batteries-Basel
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2023
·Vol. 9
·期 5
·241
·
IF 4
Da Lei,Yuyang Gao,Zhidong Hou,Lingbo Ren,Mingwei Jiang,Yunjing Cao,Yu Zhang,Jian-Gan Wang
Owing to the unique virtues of specific energy/power densities, lithium-ion capacitors (LICs) have been increasingly attracting research attention. However, the LICs are greatly restrained by the slow Li+-reaction kinetics of battery-type anodes, which is still a challenging task. In this work, we construct a superior LIC using ultrafine MnO/dual N-doped carbon (MnO/DNC) anode and activated N-doped porous carbon (ANC) derived from a homologous polypyrrole precursor. The uniform MnO ultrafine particles (~10 nm size) are well encapsulated into a dual-carbon framework, which provides fast ion/electron transportation and structural cushion for high-rate and long-durable energy storage. Accordingly, the anodic MnO/DNC achieves an impressive rate performance (179 mAh g−1@10 A g−1) and a stable 500-cycling lifespan. The as-constructed LICs could deliver a large specific energy of 172 Wh kg−1at 200 W kg−1and retain at 37 Wh kg−1even at a high specific power of 15 kW kg−1. It is believed that the design strategy of confining ultrafine conversion-type anode materials into a dual-carbon structure will expedite the development of advanced LICs.Keywords:lithium-ion capacitor;MnO;dual-carbon structure;reaction kinetics
研究领域:
能源存储
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材料科学
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电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Zhenji Zhou,Miaomiao Zhang,Shaoyun Huang,Zhong Li,Xiaoqing Guan,Yafeng Deng
Compared to traditional magnetic wave-absorbing materials, paramagnetic electromagnetic wave-absorbing materials have garnered significant attention in microwave absorption due to their advantages, including low density, wide bandwidth, and thin structure. The polarization mechanism and dielectric loss are key factors determining the electromagnetic absorption performance of these materials. In this study, BaTiO₃@MnO₂/MWCNTs (BTMC) hybrid composites were prepared using a two-step solvothermal method, and the electromagnetic absorption performance was optimized by adjusting the MWCNTs loading in the absorber and the absorber-to-paraffin ratio. The synergistic effect of BaTiO₃'s excellent dielectric properties, the anisotropy of MnO₂ with different morphologies (urchin-like α-MnO₂ nanosheets and rod-like β-MnO₂), and the high conductivity of MWCNTs enhanced the electromagnetic absorption capacity of the BTMC hybrid composite. The study showed that when the paraffin wax-to-absorber ratio was 7:3 and the MWCNT loading in the absorber was 10 wt%, the composite material (BTMC-10) achieved a reflection loss (RL min ) of −74.06 dB and an effective absorption bandwidth of 1.27 GHz at a thickness of 4.75 mm. This provides a new research direction for developing high-performance, lightweight, broadband, and efficient paramagnetic electromagnetic wave-absorbing materials, demonstrating their potential applications in the microwave field.
研究领域:
材料科学
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电磁学
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纳米技术
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微波工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Jufeng Zhang,Ting Ren,G.P. Nayaka,Peng Dong,Jianguo Duan,Xue Li,Yingjie Zhang,Ding Wang
Investigating independent active materials is inadequate to settle the technological challenges involved in the booming lithium ion battery industry. The further development of energy-storage properties with both high energy density and superior cycling lifespan are highly dependent on the overall system optimization, which highlights the study of the interface between different components in a system. Herein, a system-level strategy of engineering MnO-based anode build on the plentiful electrolytic manganese dioxide are developed via a microwave-assisted carbothermic reduction , combined with a succeeding in-situ aggregation of polydopamine (PD) onto MnO along with chemical binding with polyacrylic acid (PAA) binder. Fourier transform IR spectra , X-ray photoelectron spectroscopy spectra validate the formation of cross-linking reaction between the PD buffer and PAA binder. Benefited from the prominent structure stability which endowed by well-connected three-dimensional porous structure , as well as two steady interfaces between MnO and PD buffer and between PD buffer and PAA binder, the cross-linked MnO anode exhibit a reversible capacity of 687 mAh g −1 at 300 mA g −1 and high Coulombic efficiency of 99% over 500 cycles and impressive rate capability of 320 mAh g −1 at 3000 mA g −1 .
研究领域:
材料科学
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电化学
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能源存储
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纳米材料
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界面化学
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电池技术
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高分子化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Lianbang Wang,Jing Zhan,Jinpei Hei,Liwei Su,Huan Chen,Hao Wu,Yuanhao Wang,Hongxia Wang,Manman Ren
As promising electrode materials for supercapacitors , manganese oxides still have big challenges such as the low material utilization and poor ionic/electronic conductivity. Reducing particle sizes through nanotechnology has been used to improve material conductivity and electrochemical active sites at materials/electrolyte interfaces. Nevertheless, the extremely small particle size may result in physical and/or chemical instability, mass loss and subsequent capacitance attenuation. Understanding this trade-off effect of electrode materials size with their electrochemical properties is critical to fabricate high-performance supercapacitors. In this work, we prepare homogenous and size-tunable MnO particles (with mean diameters of 80, 41, 20, 15 and 9 nm) on carbon cloth via a facile gel-like film assisted method. It is found that the medium-size nanoparticle (20 nm) displays the best performance instead of the smallest one. These observations are different from the traditional view about material size-property relationship. Instead this work provides a new insight referring to both the size-dependent solubility and ionic/electronic transport. Beneficial from the good flexibility and high conductivity/stability of carbon cloth, the optimized MnO/carbon cloth electrode demonstrates extraordinary performance in symmetric solid-state supercapacitors with energy densities of 86 and 70 Wh kg −1 at the power densities of 450 W kg −1 and 9 kW kg −1 , respectively.
研究领域:
材料科学
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电化学
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纳米技术
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能源存储
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
·
IF 7.2
Xiaowei Guo,Yang Yuan,Shanshan Li,Jingwen Wang,Zhengyu Bai,Lin Yang
Owing to the unique geometric and electronic structure, design and synthesis of electrocatalysts with well defined heterointerfaces are essential for clean energy technologies, for instance water-splitting and Zn-air batteries. Herein, a bifunctional electrocatalyst assembled by Co/MnO nanoparticles and nitrogen doping double-sphere carbon (denoted as Co/MnO@N-DSC), was fabricated via a solvothermal and pyrolysis strategy. The Co/MnO@N-DSC catalysts exhibit an enhanced bifunctional oxygen electrocatalytic performance for Oxygen reduction reaction (ORR) (E 1/2 , 0.84 V vs . RHE) and oxygen evolution reaction (OER) (E onset , 1.54 V vs . RHE). As an air cathode catalyst, the Co/MnO@N-DSC-based Zn-air battery can afford prime performance, over the commercial noble-metal-based Zn-air battery. Theoretical calculation results indicate that the synergism of Co (111)/MnO (200) heterointerfaces can enhance charge transfer and provide extra electrons for the reaction processes. This work provides a promising manoeuvre to uplift bifunctional catalytic activity by increasing the synergy from heterointerfaces of transition-metal/metal oxide in oxygen electrocatalysis .
研究领域:
能源材料
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电催化
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纳米材料
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可再生能源技术
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电池技术
✓ 已验证
DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Haichao Zhou,Jianglin Liu,Dalang Chen,Yanlin Qin,Tiejun Wang,Xueqing Qiu,Xuliang Lin
The electrochemical conversion of glycerol into dihydroxyacetone (DHA) under mild conditions efficiently addresses glycerol surplus, enhancing its economic value. However, DHA production efficiency remains constrained by steric hindrance from secondary hydroxyl groups and sluggish glycerol electro-oxidation reaction (GOR) kinetics in weakly alkaline conditions. Herein, lignin-derived carbon-supported MnO–Ni heterojunction catalyst (MnO–Ni/C) is synthesized via self-assembly precipitation and in situ pyrolysis. The optimized MnO–Ni/C catalyst requires a low potential of 1.58 V to achieve 10 mA cm −2 , 270 mV lower than the oxygen evolution reaction (OER). It attains a 53.37% DHA selectivity with a high production rate of 864.75 mmol m −2 h −1 at 1.8 V. MnO–Ni/C heterostructures modulate the local electronic structure of Ni sites, optimizing glycerol adsorption configuration and enhancing selective adsorption of secondary hydroxyl groups and oxygen active species near the electrode surface. These synergistic effects significantly improve GOR kinetics and DHA production efficiency.
研究领域:
电催化
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可再生能源转化
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材料科学
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环境化学
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绿色化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Chenghong Sun,Enze Zhu,Chaoyang Shi,Juan Yu,Shubiao Yin,Chunxia Liu,Xiaoying Cui,Weiping Liu,Mingli Xu
The vigorous development of efficient cathode-side oxygen reduction reaction (ORR) catalysts is one of the keys to the practical application of fuel cells and Zn-air batteries (ZABs). Herein, a facile and green photochemical method is developed to synthesize pure-phase Mn 3 O 4 nanoparticles , which are uniformly anchored on nitrogen-doped reduced graphene oxide (N-rGO), followed by simple one-step annealing to highly catalytical active and stable MnO/N-rGO. The resultant MnO/N-rGO exhibits exciting ORR performance in alkaline media. Particularly, both GDE (gas diffusion electrode) half-cell and ZABs assembled from MnO/N-rGO have excellent overall performance and outstanding long-term durability, obviously better than Pt/C-based GDE half-cell and Pt/C + RuO 2 -based ZABs, respectively. It is mainly attributed to the synergistic effect between MnO nanoparticles and N-rGO support, which significantly increases the active sites and facilitates 4-electron transfer. This research paves a way for the green photochemical synthesis of transition metal oxide ORR catalysts at room temperature.
研究领域:
材料科学
·
电化学
·
能源存储
·
催化
✓ 已验证
DOI
高影响因子
Nano Research
·
2024
·
IF 9.5
Guo Chan,Shao Shiping,Zhang Xin,Tang Yunxiang,Wang Luxue,Liu Jiurong,Wu Lili,Bi Ke,Wang Fenglong
Aerogel-based composites hold promising application prospects as potential electromagnetic wave (EMW) absorption materials, yet the construction of such materials with ingenious microstructures, appropriate magnetic/dielectric multi-components, and integrated multifunctionality remains considerably challenging. Herein, a multicomponent Co/MnO/Ti 3 C 2 T x MXene/rGO (CMMG) hybrid aerogel featured with three-dimensional (3D) vertical directional channel architecture is reported. Benefiting from the synergistic effect arising from the 3D conductive networking structure, diverse heterogeneous interfaces, magnetic/dielectric multicomponent, and multiple loss pathways, the optimized CMMG-2 aerogel delivers fascinating EMW absorption capabilities, characterized by a minimal reflection loss (RL min ) of −77.41 dB and an effective absorption bandwidth (EAB) of 6.56 GHz. Additionally, the remarkable hydrophobicity, exceptional thermal insulation capabilities, and outstanding photothermal properties of CMMG-2 aerogel make it highly promising for multiple application in diverse and demanding environments. Interestingly, the distinctive pore structure of hybrid aerogel also allows it for sensitive and reliable detection of electrical signals caused by pressure changes and human motion. Thus, this research provides a viable design strategy for the development of lightweight, efficient, and multifunctional aerogel-based EMW absorption materials for various application scenarios.
研究领域:
材料科学
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纳米技术
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电磁工程
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热工程
·
传感技术
✓ 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）