ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Jinghua Shang,Minggang Zhao,Huiyan Qu,Hui Li,Shougang Chen
We proposed a new method for regulating the electrochemical signal by using Schottky barrier . The results show that the height of Schottky barrier can be altered by adsorbing charged substance to control the enhancement and attenuation of electrochemical signal. The Schottky interface formed by MoS 2 and CQDs (carbon quantum dots) can achieve the selective detection of dopamine and overcome the distraction of ascorbic acid and uric acid with similar redox signal. The combination of Schottky barrier and electrochemical detection enhance the sensitivity and selectivity of electrochemical sensor significantly. It is a new strategy for improving electrochemical detection by introducing Schottky barrier into electrochemical process.
研究领域:
电化学
·
纳米材料
·
传感器
·
分析化学
·
材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Sha Long,Yanghang Liu,Jingxing Gui,Yuting Xue,Yuxuan Ma,Baojiang Liu,Chunyan Hu,Dan Yu,Wei Wang
One-step thermal-initiated polymerization to prepare light-responsive hydrogels • Achieve independent and reversible control of color change and fluorescence emission • The hydrogel achieves information encryption/decryption functions. Developing low-cost and straightforward strategies for integrating photochromic materials with fluorescent components is essential for next-generation information encryption. In this work, we present a facile fabrication of a photo-responsive fluorescent hydrogel by employing ammonium molybdate tetrahydrate (Mo) as the photochromic agent and fluorescein-o-acrylate (Fa), a monomer bearing a carbon–carbon double bond, as the fluorescent building block. Fa is covalently polymerized into the polyacrylamide (PAM) backbone, while Mo is anchored to the three-dimensional gel network via multiple hydrogen bonds. Upon exposure to a 365 nm UV source, PPM 3 F 3 G displayed a maximum emission peak at 547 nm, emitting visible yellowish-green fluorescence. After 60 s of continuous irradiation, the original fluorescence superimposed with the photochromic blue background produced a green fluorescence perceptible to the naked eye. Notably, the coloration process induced by prolonged UV irradiation does not cause fluorescence quenching, and both optical modalities exhibit outstanding cyclic stability and high reversibility. By integrating PPMFG with ASCII code and other innovative anti-counterfeiting platforms, we successfully develop highly secure encryption modes that resist counterfeiting. Download: Download high-res image (129KB) Download: Download full-size image
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Small
·
2023
·
IF 13.3
Shuyang Peng,Di Liu,Keyu An,Zhiqin Ying,Mingpeng Chen,Jinxian Feng,Kin Ho Lo,Hui Pan
Green hydrogen is considered to be the key for solving the emerging energy and environmental issues. The photoelectrochemical (PEC) process for the production of green hydrogen has been widely investigated because solar power is clean and renewable. However, mass production in this way is still far away from reality. Here, a Si photoanode is reported with CoO x as co-catalyst for efficient water oxidation. It is found that a high photovoltage of 350 mV can be achieved in 1.0 m K 3 BO 3 . Importantly, the photovoltage can be further increased to 650 mV and the fill factor of 0.62 is obtained in 1.0 m K 3 BO 3 by incorporating Mo into CoO x . The Mo-incorporated photoanode is also highly stable. It is shown that the incorporation of Mo can reduce the particle size of co-catalyst on the Si surface, improve the particle-distribution uniformity, and increase the density of particles, which can effectively enhance the light absorption and the electrochemical active surface area. Importantly, the Mo-incorporation results in high energy barrier in the heterojunction. All of these factors are attributed to improved the PEC performance. These findings may provide new strategies to maximize the solar-to-fuel efficiency by tuning the co-catalysts on the Si surface.
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DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2019
·Vol. 9
·期 11
·2915-2922
·
IF 5.726
Qing Zhang,Jinhao Zhang,Huawei Yang,Yilin Dong,Yu Liu,Lixia Yang,Donglei Wei,Wenxiang Wang,Liangjiu Bai,Hou Chen
In this work, CoMo bimetallic oxides were prepared and proposed as catalysts for aerobic oxidative desulfurization (AODS) of fuels with oxygen in air as the oxidant. The bimetallic oxides could efficiently catalyze the oxidation of a series of thiophenic compounds at 80–120 °C and atmospheric pressure, while the neat Co or Mo oxide didn't show any catalytic ability, which directly proved the synergistic effect of Co and Mo. In the bimetallic system, the Co(II) sites could exhibit the capability to activate oxygen, while the Mo(IV) sites were suspected to directly participate in the oxidation of sulfides by forming reactive species. As is clearly evidenced by the characterization and experimental results, with the variation of Co/Mo proportion (2 : 1, 1 : 1 and 1 : 2), the bimetallic oxides possessed different electronic structures and surface compositions, which further led to their distinct catalytic performances. When the Co/Mo ratio was 2 : 1, the best performance was obtained, and some important reaction parameters were investigated. Furthermore, the catalyst could be reused for at least five cycles without changes in catalytic performance and chemical structure. Based on these results, it is expected that the CoMo bimetallic oxides may serve as an efficient, separable and recyclable catalyst for AODS of fuels.
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高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2023
·Vol. 48
·期 3
·e202200313
·
IF 1.8
Xiang-Dong Meng,Shui-Zhou Cai
In this study, the Al-B-Mo alloy powders with a boron content of 7 wt % and Molybdenum content of 0.5–3 wt % were prepared by the close-coupled gas atomization. The powder morphology, phase composition, oxidation, and exothermic behavior of combustion were characterized. The results show that the addition of Mo effectively improves the energetic properties of the alloy powder, with the mass-burning enthalpy of Al-7B-1Mo reaching 31111 J/g, exceeding the theoretical mass-burning enthalpy of monolithic Al (31000 J/g). Al-7B-1Mo underwent a violent exothermic process at around 1000 °C, and the oxidation weight gain ratio and oxidation efficiency reached 46.16 % and 48.05 % respectively, an increase of 19.75 % and 21.08 % compared to Al-7B. The mesh structure formed by the AlB 2 phase on the particle surface positively promoted the particles′ thermal oxidation. Mechanical mixtures of AlB 2 /Mo and AlB 2 /MoO 3 were prepared and the catalytic promotion of the combustion of AlB 2 by Mo and MoO 3 was confirmed by thermal tests of combustion. The mechanism by which Mo/MoO 3 promotes the combustion of AlB 2 was investigated through the phase composition characterization of the composite powder after heat treatment in argon and air atmosphere. It was confirmed that MoO 3 promotes the oxidation and combustion of AlB 2 by supplying oxygen to B in AlB 2 , while Mo is first oxidized to MoO 3 , which then promotes the combustion of AlB 2 .
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高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2021
·Vol. 23
·期 9
·1-18
·
IF 2.253
Zhou Shujia,Yan Chengrong,Dang Yunfei,Cao Xuefang,Wei Zhixian
In this paper, a series of samples La 0.7 Sr 0.3 Mn 1-x Fe x O 3 ( x = 0, 0.05, 0.10, 0.15, 0.2) were prepared. Among these samples, La 0.7 Sr 0.3 Mn 0.85 Fe 0.15 O 3 showed better catalytic activity than the samples with undoped and other doped ones, so undoped iron La 0.7 Sr 0.3 MnO 3 and doped iron La 0.7 Sr 0.3 Mn 0.85 Fe 0.15 O 3 were characterized by X-ray diffraction (XRD), UV–Vis diffuse reflection analysis (UV–Vis DRS), vibrating sample magnetometer (VSM), transmission electron microscopy (TEM), scanning electron microscope (SEM), specific surface analysis (BET), and X-ray photoelectron spectroscopy (XPS). In addition, it takes methyl orange (MO) as the object of degradation, and the photocatalysis, Fenton-like reaction, and their synergistic catalytic effects as well as the catalytic mechanisms of La 0.7 Sr 0.3 Mn 0.85 Fe 0.15 O 3 have been studied. The results show that La 0.7 Sr 0.3 Mn 0.85 Fe 0.15 O 3 exhibits high solar-driven photocatalytic and Fenton-like catalytic activities for MO degradation. Moreover, there is an obvious synergistic catalytic effect of photocatalysis and Fenton-like catalytic activity. In addition, according to the free radical capture experiment, the hole, •OH and •O 2 − are the active substances in the synergistic catalytic process. The possible synergistic catalytic mechanism of La 0.7 Sr 0.3 Mn 0.85 Fe 0.15 O 3 was also proposed. And the average pore size of the catalyst is 20.91 nm by BET. The near-superparamagnetic properties of La 0.7 Sr 0.3 Mn 0.85 Fe 0.15 O 3 enable it to achieve simple separation in an external magnetic field, avoiding the disadvantages of ordinary catalysts that are difficult to separate. Therefore, La 0.7 Sr 0.3 Mn 0.85 Fe 0.15 O 3 is an advanced multifunctional nanocatalyst and could be widely used in the field of wastewater treatment. Graphical abstract The magnetic La0.7Sr0.3Mn0.85Fe0.15O3 was synthesized by hydrothermal method successfully, the photocatalysis, Fenton-like reaction and their synergistic catalytic effects as well as the catalytic mechanisms of La0.7Sr0.3Mn0.85Fe0.15O3 have been studied, It is not only a high efficient solar-driven photocatalyst, but also has Fenton -like catalytic properties, and both of them have synergistic catalytic effect. And those indicate that La0.7Sr0.3Mn0.85Fe0.15O3 is an advanced multi-functional catalyst.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Debo He,Wenji Ruan,Jibiao Li,Jiupai Ni,Chengsheng Ni
The large-scale integration of intermittent renewable energies into the power grid could reduce the CO 2 emission from the combustion of fossil fuel, but it requires energy storage techniques to balance the energy production and demand. The electrolysis of CO 2 that converting electricity into chemicals/fuels provides a sustainable way of energy storage and CO 2 reduction. Solid oxide electrolysis cell (SOEC) operating at around 800 °C was able to provide highly efficient transformation of CO 2 because the high temperature was able to decrease the energy demand and increase the activation of CO 2 than room temperature electrolysis. In this study, Mo-doped ferrite perovskite , La 0.55 Sr 0.45 Fe 0.85 Mo 0.15 O 3 , was studied as the cathode of an SOEC for the direct electrolysis of CO 2 at 800 °C. Cell with La 0.55 Sr 0.45 Fe 0.85 Mo 0.15 O 3 cathode showed a significantly higher current density during CO 2 electrolysis than the one with La 0.55 Sr 0.45 FeO 3 cathode. Compared with the parent La 0.55 Sr 0.45 FeO 3 cathode that will subject to a superficial decomposition into Fe 0 and SrO or SrCO 3 at an elongated cathodic bias of − 1.4 V, Mo-doping will induce the production of Ruddlesden-Popper phase ( e.g. (La,Sr) 2 (Mo,Fe)O 4 , Fe-Mo-O oxides and Fe 0 ). La 0.55 Sr 0.45 Fe 0.85 Mo 0.15 O 3 cathode was found to an unobvious current decrease at − 1.1 V, but a cell degradation was found under a high bias of − 1.4 V. During the 97 h’ aging under a cathodic bias (−1.4 V), the reduced molybdenum cation in La 0.55 Sr 0.45 Fe 0.85 Mo 0.15 O 3 was found to be less mobile than Fe 3+/2+ , La 3+ or Sr 2+ , and the perovskite with Fe-deficit region were also found to be important for the activation of CO 2 and dissociation of CO in the electrochemical process.
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高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 18
·8920-8926
·
IF 11.301
Ying Liu,Xiaorong Zhu,Qinghua Zhang,Tang Tang,Yun Zhang,Lin Gu,Yafei Li,Jianchun Bao,Zhihui Dai,Jin-Song Hu
The development of efficient and cost-effective electrocatalysts is essential for the electrochemical reduction of N2 to produce NH3 under ambient conditions. Herein, various well-dispersed Mo-based nanoparticles are selectively synthesized to reveal the influences of the compositions and hetero-interfaces on the performance for the N2 reduction reaction (NRR). Systematic experiments discovered that compared with single-component Mo2C or Mo nanoparticles, the heterostructured binary MoC/Mo2C and ternary Mo/MoC/Mo2C nanoparticles exhibit significantly enhanced NRR performance by creating abundant hetero-interfaces. Moreover, theoretical calculations reveal that the integration of metallic Mo with MoC/Mo2C appreciably reduces the energy demand for NH3 desorption, contributing to the enhanced NRR process. As a result, a remarkable NH3 yield rate of up to 20.4 μg h−1 mg−1 and a FE up to 18.9% can be achieved. These findings suggest that engineering crystalline phases and hetero-interfaces represents a new avenue for advancing the electrocatalytic performance of a NRR catalyst.
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高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Huiyong Li,Ping Liu,Nan Zhou,Xiaobing Huang,Haiyan Wang
Stabilizing the layer structures of Mo-based anode materials is still a challenge for Li ion batteries . Herein, we proposed an electrochemical presodiation strategy for MoS 2 and MoO 3 to improve their cycling stability. It is interesting to note that the cycling stability of as-treated MoS 2 and MoO 3 was significantly improved. Although the reversible discharge capacity was slightly decreased, the capacity of the pretreated MoS 2 at 300 mA g −1 was retained at 345 mA h g −1 after 100 cycles while that of the pristine one decreased to 151 mA h g −1 . The capacity of the pretreated MoO 3 after 60 cycles was also improved from 275 mA h g −1 (the pristine one) to 460 mA h g −1 . The stabilizing effect was further verified by scanning electron microscope (SEM) analysis. Electrochemical presodiation here could be a promising modification strategy for Mo-based anode materials.
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高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2023
·
IF 3.6
Yuchuan Ren,Zhanwei Xu,Ying Wang,Fanyu Lu,Yaze Zhao,Kai Yao,Hao Fu,Hao Luo
Applications of sodium ion batteries (SIBs) are inseparable from scalable anode materials with high electrical conductivity and excellent stability. In this work, coal tar pitch activated carbon was functionalized (FAC) and employed as a substrate, followed by a hydrothermal process to fabricate MoS 2 /FAC nanocomposite with tight bonding. The MoS 2 exhibits a homogeneous integrated structure with an enlarged interlayer spacing of 0.65 nm in the obtained MoS 2 /FAC. When employed as anode material for SIBs, the MoS 2 /FAC electrode delivers a promising reversible capacity of 174.0 mAh g −1 at 2 A g −1 , with a decay rate of 0.148%·cycle −1 after 500 cycles. The ultrahigh rate of sodium storage is mainly attributed to uniform MoS 2 nanosheets anchored on the FAC through C-O-Mo bonding, and the wide layer spacing of the ultrathin MoS 2 nanosheets.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
·
2025
·
IF 4.4
Peng Feng,Donghai Xu,Gang Yin,Kunkun Song,Ruibo Wang,Zhiyuan Li,Pan Wang
This study investigated the corrosion behavior of 316 L (316LSS) and 304 (304SS) stainless steels under a Na 2 SO 4 deposition layer in supercritical water (SCW). The salt layer reduced oxide film densification versus pure SCW, with 304SS exhibiting more severe corrosion (e.g., pitting) due to the absence of Mo which resists pitting corrosion. Without the salt layer, oxide film thicknesses were 6.50 µm (316LSS) and 1.60 µm (304SS); in contrast, 6.52 µm and 9.33 µm, respectively, indicating thicker in SCW with the salt layer. At 723 K and 25 MPa, higher water density increased Ni/Fe ion solubilities, while the salt layer trapped these ions in the microenvironment between the layer and oxide film, generating a locally acidic and oxidizing environment via hydrolysis of Ni/Fe ions. This process accelerated metal ion leaching and oxide dissolution, further enhanced in the presence of SO 4 2- . Na 2 SO 4 deposition layer and SCW synergistically intensified corrosion in both alloys.
研究领域:
材料科学
·
腐蚀工程
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高影响因子
Environmental Technology & Innovation
·
2024
·
IF 6.7
Binbin Wu,Zheng Wang,Yannan Jia,Nannan Xu,Lisha Liao,Chenyue Zhang,Zhiwei Wang,Yuanxiang Shan,Wanting Feng,Hongqin Xue
Biochar loaded with bimetallic Fe/Mo (Fe/Mo-BC) was prepared as a cost-effective catalyst for the degradation of organic matter by activated peroxydisulfate, in which MoO 2 was used as a co-catalyst to enhance Fe 2+ /Fe 3+ cycling. The tetracycline-degradation efficiency of the system reached 74.49 % within 10 min, and it showed high removal rates over a wide pH range (3–9). Quenching experiments and electron paramagnetic resonance analyses showed that 1 O 2 , •OH, O 2 • - , and SO 4 • − produced by the Fe/Mo-BC/PDS system are involved in tetracycline degradation, with 1 O 2 and •OH being the dominant active substances. X-ray photoelectron spectroscopy analysis revealed that Mo(IV) reduces Fe 3+ to Fe 2+ and oxidizes itself to Mo(VI). In addition, the Fe/Mo-BC remained stable and could be recycled three times, indicating the feasibility of this system for practical applications. The possible pathways of TC degradation by this system were investigated by LC-MS and DFT calculations. Thus, the present study provides a feasible strategy for the use of biochar-loaded bimetallic materials and PDS for the degradation of organic matter.
研究领域:
环境科学
·
污染控制
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）