CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Yan Yang,Jie Li,Huaiwu Zhang,Lichuan Jin,Fang Xu,Gongwen Gan,Gang Wang,Dandan Wen
The demand for high performance microwave devices is increasingly promoting the development of miniaturization, integration and multifunctionalization. Here, a uniform and dense NiCuZn ferrite ceramic with high saturation magnetization and low ferromagnetic resonance linewidth was obtained at 950 °C by adjusting the MnO 2 -Bi 2 O 3 composite additives. The MnO 2 -Bi 2 O 3 composite additives were composed of 0.5 wt% MnO 2 and x wt% Bi 2 O 3 (x = 0.0, 0.5, 1.0, 1.5, 2.0, and 3.0). The phase structure, microstructures and magnetic properties were systematically studied by means of modern measurement techniques. SEM images reveal that appropriate MnO 2 -Bi 2 O 3 additions can promote grain growth and reduce sintering temperatures , which is very advantageous for LTCC technology. In addition, the content of MnO 2 -Bi 2 O 3 additives can significantly reduce ferromagnetic resonance linewidth (FMR) by promoting grain growth and densification at low temperatures. Finally, a uniform and compact NiCuZn ferrite ceramic with an improved 4π M s (~ 3812.5 Gauss), a narrow Δ H (~ 144.6 Oe), and a reduced H c (~ 85.2 A/m) were obtained (at 950 °C) by adding the optimal volume of Bi 2 O 3 additive. It is expected that the improved gyromagnetic performances will allow the NiCuZn ferrite ceramics to be promising candidates for X-band microwave devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
CATALYSIS TODAY
·
2025
·
IF 5.3
Yacong Yang,Ya Zhao,Fengyan Shi,Zitao Chen,Weiguang Zhao,Yue Gao,Yingchun Miao,Yuning Huo
Micromotors with autonomous motion by multiple driving forces have attracted wide attentions. In this work, we successfully constructed MnO 2 -carbon microspheres (Mn-Cs) composite micromotors with synergistic photothermal-bubbly driving effect. The uniform MnO 2 loading and the stable combination of MnO 2 with Cs in Mn-Cs composite facilitated to improve the photothermal conversion performance. The regular morphology and large specific surface area of Mn-Cs were beneficial for the in-situ photocatalytic decomposition of H 2 O 2 under light irradiation. Notably, the photothermal conversion effect of Mn-Cs could further promote the decomposition of H 2 O 2 . The low thermal conductivity of air was beneficial for expanding the temperature gradient between the micromotor surface and the environment. As a result, the speed of optimal 1.0-Mn-Cs sample under the light irradiation and addition of H 2 O 2 (75.2 μm/s) was 14.3 and 5.88 times higher than that individual light irradiation (5.27 μm/s) and addition of H 2 O 2 (12.8 μm/s), respectively. It was indicative of the great significance of synergistic photothermal-bubbly driving effect. This study provided a new strategy for developing synergistically driven micromotors to reduce chemical fuel dependence, and showed a significant prospect in green, economic and sustainable applications.
研究领域:
材料科学
·
纳米技术
·
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Lekang Liu,Mingbo Shao,Luoyuan Guo,Wenjun Wang,Xiuwen Zheng,Xiaolei Jiang
We have developed an innovative Cu-doped and DTX-loaded Cu-MnO2@DTX@FA (MCDF) nanodrug designed to strategically alter tumor microenvironment (TME) by harnessing the synergistic effects of chemodynamic therapy (CDT), chemotherapeutic agents, and the induction of ferroptosis and cuproptosis. The MCDF nanodrug efficiently degrades, releasing abundant Mn4+, Cu2+, and DTX. The conversion of Cu2+ to Cu+ facilitated by FDX1 initiates cuproptosis, while, similar to Mn2+, Cu+ reacts with hydrogen peroxide (H2O2) to generate hydroxyl radicals (·OH). Cu2+ and Mn4+ oxidize glutathione (GSH), significantly depleting GSH levels in tumor cells and inactivating GPX4, which further promotes ferroptosis. The release of Cu2+ and Mn4+ intensifies the cuproptosis. DTX effectively disrupts the cell division cycle, thereby inhibiting the proliferation and spread of tumor cells. The FA-modified MCDF is designed to evade immune detection while selectively targeting tumor tissues, ensuring precision in treatment delivery. This cutting-edge material not only provides a multifunctional therapeutic strategy but also sets the stage for the next generation of tumor-targeting nanomedicines.
研究领域:
肿瘤学
·
纳米医学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Yujia Luo,Fang Zheng,Yuanyuan Gao,Wenyu Chen,Xinrui Xue,Chujie Xiao,Kun Wei
Chemodynamic therapy (CDT) generating hydroxyl radicals (•OH) by utilizing metal ions reacting with hydrogen peroxide (H2O2) is a highly encouraging strategy for cancer treatment. However, highly expressed GSH in tumor cells severely limits the efficacy of CDT, and CDT alone is also not sufficient to produce excellent antitumor efficiency. Herein, a dual GSH depletion nanosystem (MnO2@PDA@PEG@DOX) was designed and synthesized to achieve synergistic cancer treatment under ultrasound (US) irritation. To achieve an acidic response, dopamine (DA) was loaded onto manganese dioxide, and the water solubility and stability were greatly improved after PEG modification; finally, the loading of doxorubicin (DOX) achieved the combinational therapy. When the nanoparticles arrived at the tumor site, the acidic and high expression of GSH in the tumor microenvironment prompted the degrading of the nanosystem, followed by the release of MnO2 and DOX. The released MnO2 can react with intracellular GSH to produce Mn2+, which realizes chemodynamic therapy by catalyzing H2O2 to generate highly toxic hydroxyl radicals (•OH) at the tumor site; also, the depletion of GSH will significantly promote the level of •OH, improving the efficiency of CDT simultaneously. Moreover, the release of DOX could be boosted by US irradiation, thus enhancing the effect of chemotherapy on DOX and achieving sonodynamic therapy (SDT). Therefore, strategies to enhance CDT efficiency by dual GSH depletion and combining chemotherapy and sonodynamic therapy modalities can provide more ideas and approaches for combination therapy in cancer treatment.
研究领域:
纳米医学
·
肿瘤学
·
生物材料学
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Science
·
2021
·Vol. 9
·期 17
·5897-5906
·
IF 6.843
Jin Liu,Meizhou Zhang,Yuzhou Wu
Multifunctional nanocomposites have drawn great attention in clinical applications because of their ability to integrate diagnostic and therapeutic functions. Manganese dioxide (MnO2), owing to its biocompatibility and magnetic resonance imaging (MRI) properties, has been widely applied in biomedical research. Our previous work on biogenic MnO2 nanoparticles (Bio-MnO2 NPs) revealed that intrinsic photothermal properties and stimuli-responsive MRI imaging are particularly promising for the development of theranostic systems. However, further improvement in the photothermal therapy (PTT) performance of Bio-MnO2 NPs is still required. Herein, we have improved the PTT efficiency of Bio-MnO2 NPs by in situ synthesis of fluorescent polydopamine (PDA) while generating additional stimuli responsive fluorescence properties in this system, thus further broadening the scope of their theranostic functions. These synthesis conditions are mild and green. The fluorescence of PDA was quenched by capping Bio-MnO2 NPs and could be recovered upon degradation of Bio-MnO2 NPs inside tumour cells. Additionally, Mn2+ released from the nanoparticles can support T1-weighted MR imaging. Compared to the Bio-MnO2 NPs alone, the integration of Bio-MnO2 NPs and PDA significantly enhances the photothermal performance in vitro and in vivo. With their high biocompatibility, these multifunctional composite nanodevices hold great potential for fluorescence imaging and MRI-guided photothermal therapy.
研究领域:
生物医学工程
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纳米医学
·
分子影像学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Shenghai Xin,Xiaoping Dong,Duolong Jin,Liying Yang,Dandan Su
Aqueous zinc-ion batteries (RZIBs) are one of the favorable complementary candidates for lithium-ion batteries. The cathode material determines the whole performance. Herein, β-MnO 2 /3D GPE-CNTs hybrid cathode materials were fabricated by intermittent high-energy vibratory ball milling method. It delivered a higher specific discharge capacity of 313.31 mAh·g −1 and excellent cycling stability compared to the bare β-MnO 2 sample. Morphological characterizations revealed that the enhanced electrochemical performance of the β-MnO 2 /3D GPE-CNTs hybrid was mainly attributed to the three-dimensional framework structure, large specific surface area, and good conductivity of GPE-CNT, as well as its resulting particle refinement with uniform dispersion and partial suppression of grain amorphization . This article provided a new sight of fabricating Mn-based materials/conducting carbon material hybrid for good performance cathode in RZIBs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Yongfang Chen,Bin Gu,Yuqi Li,Dongya Yang,Fengxian Qiu,Tao Zhang
Controllable and reliable fabrication of wearable materials with tunable structures and integrated functionalities is urgently required for personal thermal management. Here, MnO2 nanowires@Ag/cellulose laminated membranes with infrared insulation, antibacterial, and unidirectional liquid penetration properties assembled were fabricated by hydrophobic cellulose, hydrophilic cellulose, and ultralong MnO2 nanowires@Ag in vacuum filtration and magnetron sputtering methods. The results indicated that nanosilver coating with high infrared radiation reflectivity and excellent electrical conductivity was successfully fabricated onto MnO2 nanowire surfaces, resulting in infrared insulation properties of the laminated cellulose membranes. In addition, the laminated membranes exhibit unidirectional liquid penetration properties that can enhance the wearing comfort. In antibacterial tests against Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus, the high antibacterial activity is revealed. These results indicate the promising potential of the laminated cellulose membranes for tackling personal thermal management issues related to wearable applications.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
SOLID STATE SCIENCES
·
2024
·
IF 3.4
Han Liu,Mingsong Zhang,Xiaoyun Liu,Zhihao Chai,Mai Li,Chunrui Wang,Jiale Wang
Periodically ordered δ-MnO 2 arrays of different periods have been fabricated by using polystyrene (PS) nanosphere lithography (NSL) combined with following hydrothermal growth. By choosing different precursors, δ-MnO 2 arrays with different alkali metals doping were obtained. It was observed that the K-doped δ-MnO 2 array of 500 nm period exhibited superior photocatalytic degradation performance of methylene blue (MB) under visible light irradiation relative to those of Na- or Mg-doped δ-MnO 2 arrays of 500 nm period, as well as K-doped δ-MnO 2 array of 800 nm period. The best performance of K-doped δ-MnO 2 array of 500 nm period can be firstly attributed to enhanced surface plasmon resonance (SPR) effect caused by alkali metal doping, where K-doped MnO 2 could provide more free electrons than those of Na- or Mg- doped MnO 2 . Furthermore, for the nanomaterials with SPR effect the surface plasmon polaritons (SPP) can change the propagation path of incident light to vertical direction after scattering on them. Since the MnO 2 array of 500 nm period possessed the distance between neighbor unites smaller than the wavelength of irradiation light, and thus the scattered light interfered with each other after the incident light was scattered by the MnO 2 unites. Then the electric field (E-field) intensities generated by SPR effect near each MnO 2 unit were elevated due to the interference effect. Therefore, our finding may provide a peculiar way to improve SPR-mediated photocatalytic performance of non-metallic materials by combination of doping and arrays fabrication of particular periods.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Nan Wang,Liangpeng Wu,Juan Li,Jiamei Mo,Quanming Peng,Xinjun Li
A dual Z-scheme fe 2 O 3 @MnO 2 core/shell nanocube supported C 3 N 4 ternary composite is rationally designed and successfully fabricated as a photocatalyst for water splitting. The as-prepared Fe 2 O 3 @MnO 2 /C 3 N 4 ternary composite exhibits an enhanced visible light-induced absorbance capacity and superior photocatalytic activity for direct water splitting than that of pure g-C 3 N 4 . The photocatalytic efficiency is investigated by varying amounts of Fe 2 O 3 @MnO 2 core/shell nanocubes in the ternary composite (10%wt, 20%wt and 30%wt). When the mass fraction of Fe 2 O 3 @MnO 2 is determined to be 20%, the hydrogen evolution rate would achieve the maximum with a value of 124 μmol*h −1 . The improved photocatalytic performance of Fe 2 O 3 @MnO 2 /C 3 N 4 ternary composite can be mainly attributed to improved visible light absorption range and construction of an effective dual Z-scheme interfacial heterojunction with a rapid separation and transfer of electron-hole pairs.
研究领域:
材料科学
·
光催化
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Zhen-bin Pang,Ying Wang,Bai-Yu Feng,Yu-Yao Zou,Guo-Zhi Han
Using MnOOH nanorods as template, dopamine (DA) as a linker, and copper acetate as copper source, a novel kind of CuO@PDA@MnOOH composite nanorods was prepared by a facile one-pot hydrothermal method. After the removal of PDA by high temperature calcination, a mace-like CuO@MnO 2 nanorods was formed, in which CuO nanoparticles distributed on the surface of the MnO 2 . The unique structure endows the mace-like CuO@MnO 2 composite nanorods with superior broad-spectrum Fenton-like catalytic activity for the degradation of the ECs under acidic and neutral conditions, and the highest removal rate of tetracycline hydrochloride and rhodamine B can exceed 90 % within 30 min and 60 min, respectively. Furthermore, the mace-like CuO@MnO 2 composite nanorods presented good chemical stability along with anti-interference ability. After eight cycles, the catalytic activity still remained above 60 %. More importantly, in the treatment of actual industrial wastewater, the mace-like CuO@MnO 2 composite nanorods also showed good catalytic ability.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2024
·
IF 2.4
Gu Chengyang,Zhang Zhenzhong,zhang Xiaomin,Zhao Fangxia,Chen Haoyi,Tang Xingfeng
In order to determine the optimal crystalline form of manganese-based catalysts for zinc-air battery cathodes, in this paper nano-α-MnO 2 and amorphous manganese dioxide (AMO) materials were successfully synthesised by hydrothermal and liquid-phase co-precipitation methods, respectively. The results show that the spherical AMO material has larger specific surface area and more mesopores than the rod-like α-MnO 2 . Moreover, AMO has abundant structural defects and short-range ordered atomic arrangements that can enhance the ion diffusion kinetics and improve the catalytic performance of the materials. Through electrochemical tests, it is found that the AMO materials have better catalytic properties compared to α-MnO 2 . At a current of 10 mA/cm 2 , its discharge-specific capacity reached 575.2 mAh/g, which is 11.1% higher than that of 517.8 mAh/g for α-MnO 2 . And AMO have higher peak power density and smaller charge/discharge voltage gaps. In the long-cycle test, the initial round-trip efficiency of the electrode prepared of AMO is also better than that of α-MnO 2 . However, when the AMO electrodes are charged and discharged for a long time, part of the AMO will be converted to α-MnO 2 , which lead to a gradual decrease in the cycling stability of the AMO electrodes. Therefore, this paper concludes that AMO materials are superior to α-MnO 2 as catalysts for zinc-air batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2025
·
IF 4.6
Menglu An,Weiying Wang,Jingguo Li,Shaokui Cao,Yingliang Liu,Jun Shi
MnO 2 nanosheets have attracted extensive attention in the field of photothermal therapy due to their excellent pH/glutathione (GSH) responsiveness. In this study, MoS 2 @gold nanorods (AuNRs)/polydopamine (PDA)@MnO 2 (400–500 nm) nanocomposites with controllable drug release property were prepared by covering MnO 2 nanosheets around near-infrared (NIR) responsive MoS 2 @AuNRs (100–200 nm) via in-situ redox reaction. The large surface area and strong negative charge of MnO 2 nanosheets ensured that MoS 2 @AuNRs/PDA@MnO 2 had a high loading efficiency of 92.44 % for doxorubicin hydrochloride (DOX). MoS 2 @AuNRs/PDA@MnO 2 revealed significant NIR/pH/GSH triple-responsive drug release properties owing to the synergistically enhanced NIR photothermal-response of MoS 2 @AuNRs (61.10 % of photothermal conversion efficiency) and the reaction between MnO 2 and GSH in weakly acidic media. In addition, in vitro cell viability results confirmed that MoS 2 @AuNRs/PDA@MnO 2 could efficiently kill tumor cells under the dual action of acidic media and NIR laser. This study develops a novel nanocarrier with NIR/pH/GSH triple-responsive drug delivery capability, which has broad applications in photothermal therapy and intelligent drug delivery.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤治疗
✓ 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）