ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Xin Li,Yunlong Zhang,Ruixuan Xu,Qi-Long Yan,Hongqi Nie
The synergistic regulation of high energy output and low sensitivity has been a persistent research focus in solid propellant development. In this study, oxygen-deficient MoO3–x quantum dots (QDs)-modified Al@AP core–shell composites were fabricated via spray-drying, with a reference system containing fine AP (s-AP) serving as a control group. Systematic investigations were conducted on the interfacial modification effects and the incorporation of MoO3–x QDs on the energy release characteristics, ignition-combustion performance, and safety properties of HTPB-based composite propellants. The results indicate that SP4 with Al@AP/MoO3–x has significantly enhanced energy outputs compared with SP1 containing Al/AP, and the heat of reaction increased from 6270 to 6615 J·g–1 under identical loading densities. Meanwhile, the ignition delay time of SP4 was shortened from 25.76 to 16.38 ms, and the flame radiation intensity was increased from 1640.8 to 1944.2, indicating a significantly improved ignition property. Furthermore, the higher burning rate at low pressure and suppressed rate surges at high pressure of SP4 result in a reduced burning rate pressure exponent (from 0.57 to 0.39). Safety tests revealed lower impact sensitivity for Al@AP/MoO3–x versus Al/AP/s-AP systems based on the increased burning rate. Condensed combustion product (CCP) analyses demonstrated that the core–shell structure effectively mitigated Al agglomeration, evidenced by increased fine particles and decreased Al residues, indicating an enhanced combustion efficiency. MoO3–x QDs further optimized the CCP size distribution, reducing the dominant particle size from 44.7 to 22.3 μm.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Kai Zhang,Qingmei Su,Bin Han,Yvjie Lv,Weihao Shi,Yongle Wang,Pinpin Wang,Zhiyong Wang,Wenqi Zhao,Miao Zhang,Shukai Ding,Shufang Ma,Gaohui Du,Rui Ye,Bingshe Xu
Designing highly efficient nonprecious metal electrocatalyst for the hydrogen evolution reaction (HER) in seawater electrolyte, particularly under ultra-high current density conditions, remains a formidable challenge. In this study, we successfully synthesized a crystalline/amorphous heterostructured CoNi/MoO 3-x electrocatalyst through a facile hydrothermal method followed by a calcination-reduction process. The as-prepared CoNi/MoO 3-x catalyst exhibited remarkable HER catalytic performance in both alkaline water and seawater electrolytes. Notably, the catalyst achieved impressively low overpotentials of 343 mV in 1 M KOH aqueous solution and 294 mV in alkaline natural seawater electrolyte at an ultra-high current density of 4000 mA/cm 2 . Furthermore, the CoNi/MoO 3-x electrocatalyst demonstrated outstanding long-term stability, maintaining robust performance at current densities of 3000 and 2000 mA/cm 2 . Density functional theory calculations revealed that the synergetic effect between crystalline CoNi and amorphous MoO 3-x accelerates water dissociation kinetics and optimizes hydrogen adsorption. These findings not only provide a promising strategy for developing cost-effective, nonprecious metal electrocatalysts with superior HER performance at ampere-level current densities, particularly for seawater splitting applications.
研究领域:
材料科学
·
能源化学
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PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Wei Li,Ting Luo,Chao Yang,Xiaopeng Yang,Shuhua Yang,Bingqiang Cao
Molybdenum disulphide (MoS 2 ) with two-dimensional (2D) “graphene-like” stacked structure has attracted widespread attention as a type of novel energy storage materials because of its unique electronic properties. However, it suffers from fast capacity fading, low cycling stability and low specific capacitance for flexible devices. This study describes a facile and novel laser irradiation approach to fabricate self-assembled porous hollow MoO 3-x -doped MoS 2 nanospheres sandwiched by graphene for binder-free flexible supercapacitors (SCs). Due to the one-step laser-induced fragmentation and self-assembly of MoS 2 nanoflakes with the photothermal reduction of graphene oxide (GO), the MoO 3-x -doped MoS 2 /graphene nanocomposites show enhanced conductivity, high surface area and increased electrochemical active sites for redox reactions . The symmetric flexible SCs deliver remarkable areal specific capacitance of 121.88 mF cm −2 under a current density of 0.6 mA cm −2 , excellent cycle performance of almost no loss after 4000 cycles and high energy density of 73.4 μWh cm −2 under a power density of 240 μW cm −2 . This simple and ultra-fast laser-induced self-assembly technique could open up a new avenue towards high-performance flexible energy storage.
研究领域:
材料科学
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能量存储
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纳米技术
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电化学
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柔性电子学
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DOI
高影响因子
FUEL
·
2022
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IF 8.035
Yangfan Chen,Hongyan Yan,Wenxin Teng,Jiangling Li,Weizao Liu,Shan Ren,Jian Yang,Qingcai Liu
NH 3 -SCR technology with commercialized V 2 O 5 -WO 3 (MoO 3 )/TiO 2 catalysts has become the most efficient technology for the removal of NO x from coal-fired power plants. However, the weaknesses of V 2 O 5 -WO 3 (MoO 3 )/TiO 2 catalysts such as the biotoxicity of vanadium species and high cost restrict their increased applicability. Fe 2 O 3 -based NH 3 -SCR catalysts show potential in placing traditional catalysts due to their good N 2 selectivity, excellent environmentally friendly performance, high thermal stability, and low cost. In this work, low cost Fe 2 O 3 -containing solid waste was exploited as the base material for NH 3 -SCR catalyst preparing. Moreover, bulk MoO 3 and MoO 3-x nanosheets decorated Fe 2 O 3 composite NH 3 -SCR catalysts were synthesized and both revealed conspicuously improved NO x removal efficiency compared with bare-Fe 2 O 3 catalyst. However, the N 2 selectivity of these two catalysts showed significant differences. Therefore, comprehensive characterizations, NH 3 oxidation experiments, and in-situ diffusion Fourier transform infrared spectroscopy (DRIFTS) experiments were performed to determine the N 2 O formation pathways of the above two catalysts. The redox properties were highly related to the N 2 O generated from NH 3 oxidation. Moreover, the huge difference in NH 3 and NO adsorption ability led to disparate reaction mechanisms over the two catalysts. This new understanding of the N 2 O formation mechanism has the potential to guide the rational design of improved NH 3 -SCR catalysts suffering from low N 2 selectivity.
研究领域:
环境科学
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催化化学
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高影响因子
RENEWABLE ENERGY
·
2021
·
IF 8.001
Jianmei Cen,Enjun Jiang,Yuqing Zhu,Zhenyu Chen,Panagiotis Tsiakaras,Pei Kang Shen
Herein, two novel electrocatalysts are simultaneously grown on Ni foam (NF) through a one-step hydrothermal method . The as-prepared Ru–MoO 3- x NF exhibits good performance for HER with low overpotentials of 12 mV at 10 mA cm −2 and 49 mV at 100 mA cm −2 , a low Tafel slope of 32.96 mV dec −1 , as well as an excellent durability at least lasting 17 h in alkaline media . The Fe 3 O 4 –NiFe LDH NF (layered double hydroxide nickel foam) ultrathin nanosheets electrode shows a low OER overpotential of 216 mV at 10 mA cm −2 and a small Tafel slope of 42.42 mV dec −1 . Moreover, a two-electrode water splitting device is fabricated with Ru–MoO 3- x NF as cathode and Fe 3 O 4 –NiFe LDH NF as anode, it only requires 1.46 V at 10 mA cm −2 and exhibits a long term durability without obvious loss of activity after continuously operating for 180 h. The superior catalytic behavior should be originated from the open heterostructure and oxygen vacancies with high intrinsic activity, abundant exposed active sites, and fast charge transfer. This work provides a new strategy to design heterostructure and transition metal oxides catalysts with improved catalytic activity and durability by a facile route for overall water splitting or other applications.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2022
·
IF 12.92
Yingcong Wei,Qiqi Zhang,Ying Zhou,Xiongfeng Ma,Lele Wang,Yanjie Wang,Rongjian Sa,Jinlin Long,Xianzhi Fu,Rusheng Yuan
Simultaneous generation of H 2 fuel and value-added chemicals has attracted increasing attention since the photogenerated electrons and holes can be both employed to convert solar light into chemical energy. Herein, for realizing UV-visible-NIR light driven dehydrogenation of benzyl alcohol (BA) into benzaldehydes (BAD) and H 2 , a novel localized surface plasmon resonance (LSPR) enhanced S-scheme heterojunction was designed by combining noble-metal-free plasmon MoO 3– x as oxidation semiconductor and Zn 0.1 Cd 0.9 S as reduction semiconductor. The photoredox system of Zn 0.1 Cd 0.9 S/MoO 3– x displayed an unconventional reaction model, in which the BA served as both electron donor and acceptor. The S-scheme charge transfer mechanism induced by the formed internal electric field enhanced the redox ability of charge carriers thermodynamically and boosted charge separation kinetically. Moreover, due to the LSPR effect of MoO 3− x nanosheets , Zn 0.1 Cd 0.9 S/MoO 3− x photocatalysts exhibited strong absorption in the region of full solar spectrum. Therefore, the Zn 0.1 Cd 0.9 S/MoO 3− x composite generated H 2 and BAD simultaneously via selective oxidation of BA with high production (34.38 and 33.83 mmol·g −1 for H 2 and BAD, respectively) upon full solar illumination. Even under NIR light irradiation, the H 2 production rate could up to 94.5 mmol·g −1 ·h −1 . In addition, the Zn 0.1 Cd 0.9 S/MoO 3– x composite displayed effective photocatalytic H 2 evolution rate up to 149.2 mmol·g −1 ·h −1 from water, which was approximate 6 times that of pure Zn 0.1 Cd 0.9 S. This work provides a reference for rational design of plasmonic S-scheme heterojunction photocatalysts for coproduction of high-value chemicals and solar fuel production.
研究领域:
材料科学
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化学工程
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能源科学
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高影响因子
Nano Research
·
2024
·Vol. 17
·期 7
·6376-6385
·
IF 9.5
Cao Fangjun,Feng Hui,Yao Jiaxin,Hou Xiang,Jin Tiezhi,Hui Junfeng
The continuous inflammatory response in diabetic skin wounds leads to excessive production of reactive oxygen species, which cause a vicious circle of long-term inflammation. In the therapeutic research of metal nanoenzymes for healing diabetic ulcers, it still faces the challenges in poor nanoenzymes activity and low-efficient therapeutic efficiency. Herein, ultrasmall oxygen-deficient MoO 3− X quantum dots were fabricated and employed as nanoenzymes for healing fiabetic ulcers. After PEGylation, PEGylated MoO 3− X quantum dots (MoO 3− X /PEG) with oxygen vacancies exhibits excellent photothermal, peroxidase/catalase-like activities. In addition, these MoO 3− X /PEG showed superior properties in scavenging H 2 O 2 and effectively inhibiting the scavenging of reactive oxygen species. More importantly, such an oxygen-defected MoO 3− X /PEG had obvious antibacterial and skin repairing effects on alleviating hypoxia and excessive oxidative stress even in a mouse model of diabetic ulcers, inhibiting proinflammatory cytokines and significantly accelerating the healing of infected wounds, which shows great application potential for promoting wound healing. This work highlights that the developed oxygen defected molybdenum oxide compounds capable of peroxidase-like and catalase-like activities show great application potential for healing diabetes wound.
研究领域:
纳米技术
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酶模拟物
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糖尿病研究
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伤口愈合
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材料科学
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高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 10
·3634-3643
·
IF 6.4
Jundang Liang,Botian Li,Xiaodong Gai,Ning Li,Jian Wang,Yichi Zhang,Qiong Zhou,Yuchao Sun
The excessive use of paper causes serious resource consumption and environmental pollution. Environmentally friendly light printing based on a photochromic system with the advantages of being noncontact, rapid, and inkless has attracted increasing attention; however, several problems need to be addressed, such as slow discoloration and irreversibility. In this work, a composite of MoO3−x inorganic nanorods and the conductive polymer poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) was employed as a color-changing electrode, and a photochromic/electrochromic strain sensor (PESS) was obtained by assembling the color-changing electrode with an organohydrogel electrolyte and a flexible indium tin oxide (ITO) film. Due to the photochromic/electrochromic effect of MoO3−x and the conductivity of PEDOT:PSS, the sensor turned cyan-blue under UV irradiation or a negative bias voltage, and it could be rapidly bleached by applying a positive bias voltage. The photochromic/electrochromic behavior of the PESS could be optimized by tuning the amount of PEDOT:PSS, and the device could perform cyclic light printing/electroerasing with a fast and stable response. Moreover, the flexible strain sensor could be utilized to monitor mechanical strain by translating a series of deformations into electrical signals. The properties of photochromism/electrochromism and strain sensing make the device potentially applicable to outdoor wearable devices capable of light-based printing.
研究领域:
材料科学
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电化学
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光电
·
传感器
·
环境科学
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xu Wang,Kang Guo,Yongyao Xia,Yulin Min,Qunjie Xu
The performance of lithium batteries is largely dependent on the ionic conductivity within robust solid electrolytes. Poly(ethylene oxide) (PEO)-based electrolytes, however, have a low lithium ionic conductivity, which limits the hop of Li+. Herein, a novel PEO-based composite electrolyte is prepared that contains nonstoichiometric transition molybdenum trioxide (MoO3–x) nanosheets as fillers to improve the ionic conductivity. The MoO3–x nanosheets containing many oxygen vacancies can cross-link with PEO chains to reduce the energy barrier of Li+ migration and the matrix crystallinity, leading to an increase in the lithium-ion transference number (up to 0.56) and a high ionic conductivity (up to 6 × 10–4 S cm–1) at 60 °C. Meanwhile, the incorporation of MoO3–x nanosheets alleviates the decomposition of the electrolyte, enhancing the tensile strength by ∼4 times compared to PEO. As a result, a LiFePO4/Li cell with PEO/LiTFSI/MoO3–x (PLM3–x) delivers an excellent rate capability, high capacity, and lifespan during high rates (2 C, ≥10 000 cycles), which demonstrates a facile yet effective strategy toward high-performance lithium batteries.
研究领域:
材料科学
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电化学
·
储能技术
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固态电池技术
·
纳米材料
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DOI
高影响因子
Materials Horizons
·
2024
·
IF 12.2
Jimin Huang,Jinzhou Huang,Xinxin Zhang,Qinyi Xie,Yi Zheng,Chaoqin Shu,Zhe Shi,Xiao Wang,Jiajie Chen,Bing Ma,Chengtie Wu,Yufang Zhu
Wound healing in diabetes is a complex physiological process with risks of ulceration and amputation. Real-time monitoring and treatment of diabetic wounds is an effective prevention of further deterioration. Herein, a multifunctional dressing is developed by encapsulating europium-containing bioactive glass (EuBG) and MoO3-x in biocompatible sodium alginate (SA) dressing (MoO3-x-EuBG-SA), aiming to simultaneously monitor the wound pH value and hydrogen peroxide (H2O2) concentration, establish anti-inflammatory microenvironment, and promote wound healing. pH-responsive fluorescence quenching effect of the EuBG contributes to visible pH values monitoring, and MoO3-x enables high responsiveness and accurate colorimetric indication of H2O2 variability to understand the dynamic wound status. Then, these fluorescent and colorimetric photographs can be captured by smartphones and transformed into signals for wound pH value and H2O2 concentration, enabling rapid and convenient real-time assessment of wound dynamic conditions. Furthermore, MoO3-x-EuBG-SA dressing can reduce inflammation and promote the proliferation, differentiation, and migration of fibroblasts and endothelial cells in vitro with the help of the released bioactive Si, Ca, and Mo ions. Notably, the MoO3-x-EuBG-SA dressing exhibits excellent abilities of monitoring wound microenvironment, immune regulation, and promoting diabetic wound healing in vivo. Overall, the multifunctional dressing has great potential for managing diabetic wounds and promoting wound healing.
研究领域:
生物医学工程
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材料科学
·
伤口愈合
·
糖尿病
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生物材料
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PubMed
高影响因子
Advanced Healthcare Materials
·
2022
·Vol. 12
·期 10
·2202596
·
IF 11.092
Lei Yu,Yiping Sun,Yusheng Niu,Pengfei Zhang,Jun Hu,Zhong Chen,Gong Zhang,Yuanhong Xu
Reactive oxygen species (ROS) are favorable for antibacterial infection but their overproduction results in serious inflammatory response and aggravates the hypoxic state of the wound tissue, which is detrimental to healing stages of proliferation and remodeling. Here, an atomic-dispersion Fe-doped oxygen-deficient molybdenum oxide MoO 3− X (ADFM) bifunctional nanozyme, featuring implanted peroxidase-like and enhanced catalase-like activity, is developed for decomposing H 2 O 2 into strongly oxidizing hydroxyl radicals (•OH) for prevention of bacterial infection and into plentiful O 2 for healing stages. Therein, the introduction of Fe into MoO 3− X primarily produces an asymmetric electron density difference by elongating the bond length between metal atoms, synchronously stabilizing adsorption of •OH and weakening the adsorption of O 2 . ADFM also shows unimaginably high aqueous dispersity and pH-adaptive ROS regulation in the wound microenvironment, both of which are favorable for ADFM to fully exert enzyme-like activity for timely antibacterial and efficient wound-healing action. ADFM thus achieves efficient healing of drug-resistant bacteria-infected wounds in vivo, at an ultralow dosage of 30 µg mL −1 against 10 6 CFU mL −1 extended spectrum β -lactamases-producing Escherichia coli , exhibiting a wound-healing efficiency of ≈10 mm 2 per day, which sets a benchmark among these noble-metal-free nanozyme-based wound-healing agents.
研究领域:
纳米技术
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生物材料
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生物医学工程
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药学
·
伤口护理
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PubMed
高影响因子
危险品化学品经营许可证（带存储）