SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2017
·
IF 4.784
Yanping Li,Huangzhong Yu,Xinxin Huang,Zuping Wu,Haihong Xu
We report a method to prepare molybdenum oxide thin films using the stable cetrimonium bromide-modified MoO 3 (CTAB-modified MoO 3 ) precursor solution . The effect of thermal treatment on the optical, crystalline, morphologic properties and surface wettability is greatly obvious because of the pyrolytic decomposition of CTAB. The highly efficient and stable polymer solar cells (PSCs) have been also fabricated by adopting CTAB-modified MoO 3 nanocomposite films as the novel and universal anode buffer layers (ABLs). The P3HT:ICBA based solar cells with CTAB-modified MoO 3 at 200 °C heat treatment exhibit an best power conversion efficiency (PCE) of 5.80% with long-term stability, and the PTB7:PC 71 BM based solar cells with CTAB-modified MoO 3 at 200 °C heat treatment show an best PCE of 8.34% with long-term stability, which are higher than that of the corresponding devices with PEDOT:PSS films. The improvement in device performance is mainly due to the agreeable electrical properties and enhanced charge extraction of the CTAB-modified MoO 3 ABLs, and CTAB modification to the MoO 3 surface can effectively passivate its surface traps, suppress the recombination loss of carriers. The surface of CTAB-modified MoO 3 films is also more hydrophobic than that of the PEDOT:PSS. In a word, these indicate the CTAB-modified MoO 3 films may be used as a novel and generally applicable hole transport layer for high-efficiency and ambient stable polymer solar cells.
研究领域:
材料科学
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能源技术
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光电化学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2020
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IF 3.232
Tengda Shi,Pei Liang,Xiubing Zhang,De Zhang,Haibo Shu,Jie Huang,Zhi Yu,YongQuan Xu
An ex situ method was used to synthesize noble metals and metal oxide composite materials, due to the selective adsorption properties of metal oxides, the adsorption of different probe molecules by this composite structure had been studied. In the ex situ approach, we use (3-aminopropyl) diethoxy methylsilane (ATES) as a coupling agent which is easy for noble metal nanoparticles deposited on metallic oxide nanomaterials . The Raman scattering (SERS) substrate of 1D MoO 3 nanowires (MoO 3 -NWs) @Ag nanoparticles (Ag-NPs) hybrid surface had been fabricated. Several parameters are presented in the following which influences the morphology of self-assembly and SERS activity: (i) coupling agent of ATES, (ii) ATES content (iii) Ag-NPs content. The finite difference time domain (FDTD) method is to explain the enhancement mechanism distribution of the hybrid substrate. Different probe molecules (R6G, Methylene Blue , Crystal Violet , and 4-ATP) have been adsorbed for SERS tests. Improved principle component analysis (PCA) is adopted to obtain the minimum detection limit of probe molecules. Through the DFT calculation, different absorption strengths between the target molecules and the MoO 3 (010) surface have been illustrated, which is also the main reason for the selective enhancement effect of MoO 3 @Ag hybrid nanostructures. This paper might propose a method to prepare such enhancement substrate based on the selective absorption properties of oxide semiconductors.
研究领域:
材料科学
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化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2025
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IF 6.2
Xin Li,Ruixuan Xu,Hao Zhang,Heng Deng,Qi-Long Yan,Hongqi Nie
Aluminum (Al) can significantly improve the energy density and specific impulse (I sp ) of solid rocket propellants as the primary metal fuel, but its incomplete combustion results in an undesirable energy release performance. The strategy of fuel/oxidizer interfacial control has been proved to effectively enhance the reaction efficiency of Al-based composites and thus improving the combustion properties of solid propellants. Ammonium perchlorate (AP) is commonly used as a high-energy oxidizer in solid propellant, and its thermal decomposition behavior directly affects the combustion characteristics of propellants. The addition of combustion catalysts can decrease thermal decomposition temperature and increase thermal reactivity of AP. As an emerging catalytic material, MoO 3-x quantum dots (QDs) with oxygen vacancies possess a high specific surface and strong charge adsorption capacity, which renders it a great potential for catalyzing AP. In this study, MoO 3-x QDs were introduced as catalyst and compared with traditional nano-metal oxides (M x O y ), the spherical Al@AP/M x O y composites with polydopamine as interfacial layer were prepared by spray drying method. The particle morphology, thermal decomposition kinetics and ignition properties of Al@AP/M x O y were investigated. The phase composition, morphology and particle size distribution for the condensed combustion products of composites were further analyzed. The decreased particle size and less unreacted Al content in CCPs indicated the increase of combustion efficiency between Al and AP. In particular, Al@AP/MoO 3-x has the higher heat of reaction, lower thermal decomposition temperature and small CCPs particle size distribution, which collectively suggested that the MoO 3-x is capable to improve the thermal reactivity of Al@AP composites with a higher combustion efficiency.
研究领域:
材料科学
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燃烧与推进
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产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2019
·Vol. 9
·期 21
·6166-6179
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IF 5.726
Qian Luo,Qi Zhou,Yan Lin,Shaohua Wu,Hongyu Liu,Cheng Du,Yuanyuan Zhong,Chunping Yang
The synthesis of high-performance and recyclable catalysts for oxidative desulfurization (ODS) from fuels has been a significant challenge. In this study, novel catalysts of MoO3–TiO2@MCM-22 with excellent catalytic performance were successfully prepared via a facile impregnation method. The results showed that the optimal catalyst at the Mo–Ti mass ratio of 1 : 4 (MT-1 : 4) exhibited highest catalytic efficiency for the ODS of dibenzothiophene (DBT) with a sulfur conversion of 99.96% within 15 min. Interestingly, the enhanced ODS activity was attributed to the synergistic effect between MoO3 and TiO2, which was achieved by adjusting the concentrations of Lewis and Brønsted acid sites on the surface of MCM-22. The catalyst MT-1 : 4 achieved the highest concentrations of Lewis and Brønsted acid sites and the largest combined index, resulting in the formation of peroxometallate complexes. Moreover, the kinetic studies revealed that the ODS was a pseudo first-order reaction with an apparent activation energy of 48.9 kJ mol−1. There was no significant reduction in the catalytic activity after 8 successive cycles, which manifested the perfect reusability of the catalyst MT-1 : 4 for the ODS system. Furthermore, a plausible ODS mechanism was proposed using the MoO3–TiO2@MCM-22 catalyst. Therefore, the prepared MoO3–TiO2@MCM-22 catalyst exhibited favorable industrial application potential for ODS.
研究领域:
化学工程
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催化材料科学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2024
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IF 3.3
Haifeng Yu,Yijia Zhou,Yanting Du,Jiayu Li,Songhao Zhao,Shuhong Wang,Haiyang Chang
A D–A conjugated polymer was used in fabrication of memory devices. However, devices using polymers as active layers alone do not lead to satisfactory results. In this paper, we have synthesized a donor–acceptor conjugated polymer by the Suzuki coupling reaction. The memory devices prepared by the polymer exhibit a ternary memory behavior. MoO3 nanoparticles have a large number of oxygen vacancies on their surface that can act as charge traps. MoO3 nanoparticles (NPs) are mixed with polymers to prepare memory devices for improved memory performance. The relationship between the mass percentage of MoO3 NPs and the storage performance and mechanism of the storage device is studied. The first and second threshold voltages of the memory device are −0.5 and −0.75 V, respectively. A current ratio of 1:102.14:104.75 for the “0″, “1”, and “2” resistance states of the device indicates a low probability of read/write errors. This work shows that polymer-embedded nanoparticle materials have practical application value in the field of next-generation nonvolatile memories.
研究领域:
材料科学
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电子工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Zhihua Zhao,Xianghao Meng,Ayesha Yousaf,Zhigang Shao,Lan Wu
MoO 3 nanorods, successfully modified with CeO 2 , were synthesized using the hydrothermal technique and subsequently utilized for gas detection. Various techniques were employed to test and analyze the MoO 3 /CeO 2 materials. Numerous characterizations have confirmed that the synthesized MoO 3 /CeO 2 possesses excellent properties. The synthesized MoO 3 nanorods demonstrated uniformity in size, with an approximate diameter of 146 nm. CeO 2 nanoparticles were distinctly visible on the surface of the MoO 3 nanorods. The MoO 3 /CeO 2 sensor demonstrated significantly enhanced sensing performance for triethylamine at 240 °C. Specifically, the MoO 3 /CeO 2 sensor exhibited a reactivity of 73.1 to 20 ppm of triethylamine, signifying an improvement of 3.5 times compared to the reactivity of the MoO 3 nanorods. The sensor based on MoO 3 /CeO 2 exhibited high selectivity, good repeatability, and a lower detection limit for TEA. The enhancement of the gas-sensing performance of the MoO 3 /CeO 2 sensor may have been attributed to the accelerated electron transfer facilitated by the heterojunction formed between MoO 3 and CeO 2 . Additionally, underlying sensing mechanism was investigated using Density Functional Theory (DFT) methodologies.
研究领域:
材料科学
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传感器技术
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食品检测
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Lingfei Luo,Huimin Yang,Xiang Li,Kechen Zhou,Lu Tang,Huiyu Su,Liyan Chen,Chaofan Ma,Xiaoxia Wang,Dawen Zeng
The inert gas adsorption of outer oxygen atoms is becoming an important factor limiting the gas sensing activity of two-dimensional MoO 3 nanoflowers, which makes it necessary to modify the surface activity of MoO 3 nanoflowers. For a long time, the unique activity of Co atoms has attracted much attention in gas sensing. In this work, Co metal sites were introduced into MoO 3 defective nanoflowers (MoO 3 DNFs) by doping, which further improved the H 2 S gas sensing performance of MoO 3 DNFs. Based on H 2 S gas sensing experiment, the relationship between Co doping amount and gas sensing performance was constructed, and the optimal Co doping ratio was obtained. Finally, the adsorption reaction process of H 2 S gas molecules on MoO 3 -Co DNFs was simulated by DFT calculation, and the activation effect of Co metal sites on outer oxygen atoms was revealed.
研究领域:
材料科学
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传感器技术
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表面化学
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纳米结构材料
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气体检测
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
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2024
·
IF 5.3
Yu Chang,Jianan Zhang,Ivan S. Babichuk,Hailong Liu,Yijie Liu,Jian Yang
The release of ammonia (NH 3 ) in industry or daily life is harmful to human health. A gas sensor was developed using h -MoO 3 nanorods and graphene film to detect and eliminate this. The h -MoO 3 nanorods were first synthesized by chemical bath deposition using ammonium molybdate tetrahydrate (NH 4 ) 6 Mo 7 O 24 •4H 2 O and HNO 3 and then deposited on the graphene film transferred to SiO 2 /Si substrate by electrochemical bubbling method. Subsequently, gas-sensitive h -MoO 3 @Graphene composite films were prepared and analyzed using Raman, XRD, SEM, and UV–vis. The gas sensor's performance was evaluated to detect NH 3 at a room temperature concentration range of 1–60 ppm. Compared with graphene, the conductivity of the composite film with 10 mg/ml h -MoO 3 nanorods was increased by 40 % and the sensitivity increased by 10 times. The sensor h -MoO 3 @G-10 showed the best sensing performance to 1 ppm NH 3 . Sensor sensitivity, response and recovery time are 1.1 %, 46.8 s and 17.8 s.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 22
·10003-10016
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IF 4.682
Zeng Min,Wang Mingshan,Zheng Luojia,Gao Weichen,Liu Rui,Pan Jie,Zhang Hongqing,Yang Zhenliang,Li Xing
Lithium-sulfur battery is expected to be the new generation of high-performance electrochemical storage system benefiting from its high energy density and low cost. However, the slow redox kinetics caused by the low conductivity of sulfur and the shuttle effect result from lithium polysulfides (LiPSs) limit its practical utility. In this work, a highly efficient strategy of freestanding carbon cloth supported molybdenum oxide (CC/MoO 3 ) with in situ deposition of Li 2 S 8 as an active matrix is designed. This chemistry enables strong affinity of Li 2 S 8 on CC/MoO 3 electrode, meanwhile, the strong polarity of MoO 3 catalyzes the mutual transformation of LiPSs and inhibits the shuttle of liquid LiPSs. With the above superiorities, the CC/MoO 3 @Li 2 S 8 electrode shows impressive electrochemical performance, with a high initial discharge specific capacity of 1274 mAh g −1 at a rate of 0.1 C with the sulfur loading of 2 mg cm −2 , and a capacity retention rate of 93.1% compared to the initial stable specific capacity. Even with a high sulfur loading of 4 mg cm −2 , it still maintains high electrochemical activity with a high reversible specific capacity of 916 mAh g −1 after 100 cycles at 0.2 C. Those results show that coupling polar metal oxide material with flexible conductive carbon cloth provides a highly efficient catalytic/conductive network to accelerate sulfur utilization and stability. Graphical abstract A highly efficient strategy of freestanding carbon cloth supported molybdenum oxide with in-situ deposition of Li 2 S 8 as active matrix is realized, resulting in a robust Li + storage capacity for lithium-sulfur battery.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2020
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IF 6.146
Jinjun Peng,Jun Shen,Xiaohui Yu,Hua Tang,Zulfiqar,Qinqin Liu
Plasmonic nonmetal semiconductors with localized surface plasmon resonance (LSPR) effects possess extended light-response ranges and can act as highly efficient H 2 generation photocatalysts. Herein, an LSPR-enhanced 0D/2D CdS/MoO 3− x heterojunction has been synthesized by the growth of 0D CdS nanoparticles on 2D plasmonic MoO 3− x elliptical nanosheets via a simple coprecipitation method. Taking advantage of the LSPR effect of the MoO 3− x elliptical nanosheets, the light absorption of the CdS/MoO 3− x heterojunction was extended from 600 nm to the near-infrared region (1400 nm). Furthermore, the introduction of 2D plasmonic MoO 3− x elliptical nanosheets not only provided a platform for the growth of CdS nanoparticles, but also contributed to the construction of an LSPR-enhanced S-scheme structure due to the interface between the MoO 3− x and CdS, accelerating the separation of light-induced electrons and holes. Therefore, the CdS/MoO 3− x heterojunction exhibited higher photocatalytic H 2 generation activity than pristine CdS under visible light irradiation, including under 420, 450, 550, and 650 nm monochromic light, as well as improved photo-corrosion performance.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 24
·8114-8121
·
IF 4.174
Jing Yang,Jiaqiang Liu,Baihan Li,Le Han,Yan Xu
A rational design and directional synthesis of well-defined porous metal oxide heterostructures remains a challenge for the fabrication of new gas sensors with enhanced sensing properties. Herein, a novel hierarchical heterostructure of α-Fe2O3@α-MoO3 microcubes was prepared by applying a self-sacrifice template strategy, in which a porous metal–organic framework (MOF) was used as the precursor with the partial insertion of OH− and MoO42− and extraction of [Fe(CN)6]34− followed by heating treatment. Benefiting from the porous microcubic structural characteristic, the α-Fe2O3@α-MoO3 heterostructures exhibited excellent selectivity and high sensitivity for triethylamine gas with the highest response value (Ra/Rg) of 18.64 under the operating temperature of 240 °C. The experimental results also revealed that the material showed a fast response and recovery time (12 s/106 s) and excellent repeatability for at least 20 days. This feasible synthetic strategy may provide a versatile and controlled way to prepare other polymetal oxide-based heterostructures with improved sensing performance.
研究领域:
材料科学
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化学传感器
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纳米技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Xiang Cai,Shijun Tang,Zi-min An,Qiyao Shao,Kuixuan Zhang,Huan Liu
Layered molybdenum trioxide (α-MoO 3 ) storing protons exhibits a high theoretical capacity and extraordinary rate capability and can be used as a reliable anode material for aqueous proton batteries. But a severe dissolution issue during operation always results in rapid failure in battery performance. Herein, a bifunctional molecular crowding electrolyte was engineered to address this issue. The high-concentration inert polymer, polyethylene glycol 400, reduces the free water activity of the electrolyte and the low-concentration solute, trifluoromethanesulfonic acid, forms a proton-rich electrolyte environment under such a water-poor condition thanks to its intrinsic superacidity, both of which favour the reverse shift of the dissolution equilibrium, and with the latter enabling the electrolyte with high ion conductivity as well. Thus, the α-MoO 3 electrode in the above electrolyte shows a longer lifespan without sacrificing its rate capability. The analysis on charge storage mechanisms by X-ray powder diffraction technique demonstrates that α-MoO 3 undergoes bare proton-involved multistep two-phase and solid-solution reactions, where only the two-phase reaction between hydrogen molybdenum bronze II and III phases and the solid-solution reactions of themselves are reversible.
研究领域:
材料化学
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电化学
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能源存储
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无机化学
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固体化学
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电池技术
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功能材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）