SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Hairui Fang,Hong Chen,Rong Tan,Lei Ge,Tingting Zhao,Haochen Wang,Shenglin Yuan,Dong Wang
Sulfur dioxide (SO 2 ) is a toxic and harmful decomposition product generated during arc discharge or partial discharge in sulfur hexafluoride (SF 6 ) electrical equipment, which can corrode internal pipelines. Detecting SO 2 is crucial for assessing the insulation condition of equipment and preventing faults. To overcome the challenges faced by traditional SO 2 gas sensors, including high operating temperatures, slow response times, and poor moisture resistance, this paper proposes a novel SO 2 gas sensor based on CuO/MoO 3 . The morphology, composition, and chemical states of the materials were analyzed using different characterization techniques. At 90°C, the S2 sensor (CuO: MoO 3 =1: 1) exhibited a fast response time (10 s) to 10 ppm SO 2 and demonstrated good moisture resistance (a 1 % change in relative humidity (RH) has the same effect on the sensor as 25.9 ppb SO 2 ). The response of the S2 sensor to 100 ppm SO 2 was 26.5. Additionally, the voltage sensitivity of the S2 sensor at low (1–10 ppm) and high (10–100 ppm) concentrations are 658.74 mV/ppm and 33.43 mV/ppm, respectively. Therefore, the S2 sensor is more suitable for low concentration conditions. These good sensing characteristics of the S2 sensor are owing to the high content of oxygen vacancies (39.2 %) and the heterojunction effect in the composite material. Additionally, this sensor exhibits excellent anti-interference capabilities, including moisture resistance and high selectivity. Therefore, the CuO/MoO 3 -based SO 2 gas sensor can be effectively applied to detect the decomposition of SF 6 .
研究领域:
材料科学
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2016
·Vol. 25
·期 12
·5374-5381
·
IF 1.094
Zhang Ao,Shi Xiaoliang,Yang Kang,Huang Yuchun,Zhai Wenzheng,Zou Jialiang,Shen Qiao,Zhang Qiaoxin
In this study, the friction and wear behaviors of TiAl matrix composites with MTC (TMSCT) and TiAl matrix composites with MoO 3 powder (TMSCP) are investigated. The results reveal that TMSCT show the excellent tribologcial performance, if compared to TMSCP. The direct contact layers of TMSCP against different counterface balls obtain huge cracks overall, whereas only fine crack is generated in TMSCT against Al 2 O 3 ball, where MTCs are distributed around the crack evenly. The finite element simulations show that only the stress of TMSCT against Al 2 O 3 ball exceeds the yield strength of TMSCT. It reveals that MTCs in TMSCT can reduce the stress for the weak binding force of multilayer structure and make the direct contact layers be more stable by preventing the propagation of crack after the crack being produced, resulting in the excellent antifriction and antiwear properties of TMSCT against different counterface balls.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2019
·Vol. 144
·期 23
·6968-6974
·
IF 4.019
Jianqiao Liu,Li Quan,Xuelian Yu,Lin Wang
In this work, a sandwich-type electrochemical immunosensor for the detection of procalcitonin (PCT) is constructed layer-by-layer with a novel label based on MoO3/Au@rGO nanocomposites. The high surface area and electroconductivity of graphene contributes to the transfer of electrons. Besides, the introduction of Au modulates the morphology of the MoO3@rGO nanocomposites from hexagonal prisms to agglomerated particles. Compared to rGO, Au@rGO and MoO3@rGO, the synergistic effect of MoO3/Au@rGO nanocomposites leads to the highest electrocatalytic activity towards H2O2 reduction. The electrochemical immunosensor exhibits a wide working range from 0.01 pg mL−1 to 10 ng mL−1 and a detection limit of 0.002 pg mL−1 at a signal-to-noise ratio of 3. Additionally, we also obtain excellent sensing performance for the immunosensor, including excellent selectivity, good reproducibility and stability. This work will give insight into the application of the nanocomposites based on noble metals combined with transition metal oxides in the fields of electroanalytical chemistry and biosensors.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
Colloid and Interface Science Communications
·
2023
·
IF 4.5
Tongtong Li,Wan Wan,Yali Cao,Jialing Xu,Hui Chai
Electrocatalysts comprising MoO 3 coated by Co 2 P 2 O 7 nanocrystals were grown on a nickel foam (NF) substrate. The applicability of the nanocomposite material (Co 2 P 2 O 7 @MoO 3 /NF) as an electrode for the oxygen evolution reaction (OER) and overall water splitting was verified. The as-synthesized product showed the overpotentials of 227 and 377 mV to drive the OER at current densities of 50 and 100 mA cm −2 , respectively. Furthermore, the voltage of Co 2 P 2 O 7 @MoO 3 /NF as a bifunctional overall water splitting catalyst was 1.55 V at 10 mA cm −2 . Co 2 P 2 O 7 @MoO 3 /NF@NF (+)//Co 2 P 2 O 7 @MoO 3 /NF (−) can maintain >80% of its initial current density after 30 h at 15 mA cm −2 . The Co 2 P 2 O 7 @MoO 3 /NF electrode also showed a low hydrogen evolution reaction overpotential of 58.7 mV at 10 mA cm −2 . The excellent oxygen evolution and electrochemical water decomposition stability of the catalyst have broad application prospects.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2019
·Vol. 2
·期 1
·151-161
·
IF 0
Tian Yunrui,Yang Xing,Nautiyal Amit,Zheng Yayun,Guo Qingping,Luo Jujie,Zhang Xinyu
We introduce a facile one-step microwave solid-state approach to prepare novel MoS 2 /MoO 3 @graphite nanocomposite that can be utilized as an electrode material for supercapacitors. The electrochemical properties of nanocomposite are evaluated by cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy tests. The nanocomposite exhibits the highest specific capacitance of 268 F g −1 for 3500 cycles at a current density of 1 A g −1 . The nanocomposite shows excellent cyclic stability of 283% (258 F g −1 ) for over 6000 cycles in 6 M KOH electrolyte. In addition, the microwave method, which is prospected to realize industrial application, can be applied to partial sulfurization.
Schematic diagram of microwave initiated MoS 2 /MoO 3 nanocomposite growth on graphite, and the highly stable MoS 2 /MoO 3 @graphite nanocomposite was synthesized using this one-step microwave approach.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 4
·2597-2609
·
IF 4.682
Zhai Wangyi,Cao Yuanming,Li Yifei,Zheng Min,Wang Zuoshan
The exploration of novel and multifunctional coatings through composite nanomaterials design is crucial for developing next-generation polyester fabrics. Herein, we report an efficient approach of self-assembling MoO 3– x QDs on MXene (Ti 3 C 2 T x ) to fabricate multifunctional polyester fabrics. In a typical preparation, MoO 3– x QDs with an average size of 5 nm were uniformly distributed on the surface of MXene nanoflakes upon UV light. Then, polyester fabrics were coated with MoO 3– x QDs/MXene by dipping. The results demonstrated that the coated fabric had a decreasing trend in the electrostatic half-period from more than 60 s (untreated fabric) to 0.15 s and had excellent washing fastness. In addition, a similar phenomenon was found in smoke suppression, with the coated fabric producing 36.16% less smoke. More importantly, the sterilization rate of the coated fabric had reached 99% to E. coli and S. aureus under sunlight owing to the strong response of MoO 3– x QDs/MXene. This work provides a novel and facile strategy to design multifunctional coatings.
研究领域:
材料科学
·
纺织工程
·
纳米技术
✓ 已验证
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Bingyue Tang,Wenzhi Li,Xia Zhang,Baikai Zhang,Hao Zhang,Cunshuo Li
Depolymerization of Kraft lignin represents an attractive strategy to obtain alternatives to fossil fuels. In this work, via the controlled oxidation of MoS 2 precursor, an oxygen-vacancy-enriched MoO 3 was synthesized and employed to catalyze the depolymerization of Kraft lignin in a new solvent system without external H 2 gas. Systematic characterizations exemplified that the calcination temperature significantly affected the morphology and concentration of oxygen vacancy of prepared MoO 3 , and the appropriate temperature in this work was proved to be 350 °C. In the optimized hydrogen-donor solvent system that contained 20 mL 1, 4-dioxane, 20 mL isopropanol and 5 mL methanol, MoO 3 -350 catalyst gave a 87 wt% yield of petroleum ether soluble products, and the higher heating value (HHV) of liquid fuels (33.4 MJ/kg) was dramatically increased compared with the original Kraft lignin (25.23 MJ/kg). Methanol and isopropanol were analyzed to be capable of promoting the solubility of Kraft lignin and supplying hydrogen in the reaction system, respectively. Underpinned by characterizations and products analysis, the schematic representation of possible reaction pathway was given.
研究领域:
能源化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 58
·36201-36207
·
IF 3.108
Lingzhi Wang,Yin Xu,Xianjun Tan,Sen Tapas,Jinlong Zhang
A sensitive and selective SERS sensor with easy and excellent recyclability is highly demanded because of its great potential application in complex detection environments. Here, using methylene blue (MB) as a model target, a semiconductor-based SERS substrate composed of a MoO3 nanorod core and a uniform molecule-imprinting polymethacrylic acid shell (MIP) with a thickness of 4 nm was designed and fabricated (MoO3@MIP) to achieve selective detection. The key to the successful coating of the ultrathin uniform MIP shell lies in the pretreatment of a MoO3 core with nitric acid, providing sufficient surficial hydroxyls for the anchoring of a polymer precursor. The molecule-imprinted voids for MB were formed simply via light irradiation as a result of photocatalytic degradation by a MoO3 semiconductor. This core–shell MIP composite shows a high SERS selectivity towards low-level MB in a mixed MB/CV solution. The enhanced factor (EF) is high, at 1.6 × 104. More importantly, the selective detection allows the further photocatalytic recycling of MoO3@MIP in an “aim-and-shoot” way, which well preserves the detection selectivity and sensitivity towards MB at least for 4 cycles. Based on decreased sensitivity with the increasing shell thickness (10–24 nm), a MIP-gating charge transfer mechanism is proposed to demonstrate the high EF instead of the molecule-enrichment effect. This “aim-and-shoot” strategy is expected to push forward the prosperous application of selective SERS for trace detection in versatile environments.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Canadian Journal of Chemistry
·
2021
·Vol. 99
·期 10
·
IF 1.118
Xiaoxia Li,Shuaida Zhu,Qi Jia,Haixia Zhao,Yuqi Cao,Yuying Ma,Shuangqi Hu,Xiong Cao
In this work, it is shown that MoO3-x has a positive effect on the thermal decomposition of ammonium perchlorate based molecular perovskite (H2DABCO)[NH4(ClO4)3] (DAP-4). MoO3-x was prepared by heat treatment, and the morphology, structure, and thermal decomposition performance were characterized. The morphology and structure characterization results showed that MoO3-x was an irregular layered structure material and the Mo element was mainly in the +6 chemical valence state, with a small amount of Mo5+. Thermal analysis results showed that the thermal decomposition peak temperature of DAP-4 was effectively reduced from 394.4 °C to 353.7 °C, 321.4 °C, and 312.5 °C in the presence of 1%, 5%, and 10% MoO3-x, respectively. It is particularly worth noting that the maximum heat release rate of the DAP-4/10% MoO3-x mixture was increased by 4.9 times compared with pure DAP-4. Through the two classic thermal decomposition kinetic methods, Kissinger and Starink, the reliable kinetic parameters of DAP-4/MoO3-x were obtained. The increase of the reaction rate constant k indicated that the maximum thermal decomposition reaction rate of DAP-4 was effectively improved. This work provided a feasible technology for using MoO3-x as an effective catalyst to improve the thermal performance of DAP-4.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2022
·
IF 9.988
Yage Li,Sabry M. Shaheen,Muhammad Azeem,Lan Zhang,Chuchu Feng,Jin Peng,Weidong Qi,Junxi Liu,Yuan Luo,Yaru Peng,Esmat F. Ali,Ken Smith,Jörg Rinklebe,Zengqiang Zhang,Ronghua Li
Removal of toxic chemicals from the environment using novel adsorbents is of great concern. In this study, a novel composite of molybdenum trioxide (MoO 3 )-engineered biochar (MoO 3 -BC) was derived from corn straw and synthesized for the removal of Pb(II) from water. The pyrolysis temperature of 600 °C was suitable for the thermal self-assembly of MoO 3 -BC. Although MoO 3 -BC had lower S BET (59.3 m 2 /g) than the pristine BC (157.8 m 2 /g), it had a stronger adsorption affinity to Pb(II). The Pb(II) removal capacity of MoO 3 -BC was 229.87 mg/g at pH 4.0, and the adsorptive removal of Pb(II) was fit using a pseudo-second-order model and the Langmuir model. High temperature favored the removal of Pb(II) by MoO 3 -BC; However, the removal of Pb(II) was inhibited with increasing the ion strength. The MoO 3 -BC revealed an acceptable stability and reusability, since the removal efficiency of Pb(II) remained above 80.7%, even after 8 cycles. The MoO 3 -BC effectively reduced ≥99.9% of Pb(II) in the polluted irrigation water. The Pb(II) removal mechanisms involved surface electrostatic attraction, ion exchange and surface complexation. These findings conclude that the MoO 3 -BC is a novel composite that can be used for the removal of Pb from contaminated water . More studies are needed to investigate the potentiality of MoO 3 -biochar composite for the removal of other metals from water in a mono and competitive sorption system.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 107
·期 2
·1033-1041
·
IF 3.9
Xiaoyu Li,Hongye Wang,Xinwei Xu,Naichao Chen,Biao Guo,Jin Cheng,Xianqiang Chen,Hong Wang
The MgO-MoO 3 system shows significant potential for applications in microwave dielectric ceramics. However, the formation mechanism, crystal structures, and microwave dielectric properties of this system have not been systematically investigated. This work aims to comprehensively study the crystal structures, phase transitions, and microwave dielectric properties of compounds in the MgO-MoO 3 system. In particular, the research delves into the unexplored transformation mechanism from β-MgMo 2 O 7 to α-MgMo 2 O 7 and MgMoO 4 . As a result, the three compounds exhibiting favorable microwave dielectric properties have been successfully fabricated. These compounds can be effectively sintered at temperatures ranging from 685 to 900°C and exhibited dielectric constants (ε r ) ranging from 5.41 to 6.89, as well as Qf values ranging from 100 000 to 130 000 GHz. Additionally, prototype microstrip antennas are designed and fabricated using β-MgMo 2 O 7 and MgMoO 4 ceramics as substrates. The obtained antenna's performance is excellent, with S 11 values below −30 dB and a gain exceeding 6 dB at 5.8 GHz, highlighting the potential of the developed ceramics for practical applications in microwave devices.
研究领域:
材料科学
·
陶瓷工程
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Yiling Wang,Qun Luo,Na Wu,Qiankun Wang,Hongfei Zhu,Liwei Chen,Yan-Qing Li,Liqiang Luo,Chang-Qi Ma
Solution-processed organic–inorganic hybrids composing of MoO3 nanoparticles and PEDOT:PSS were developed for use in inverted organic solar cells as hole transporting layer (HTL). The hybrid MoO3:PEDOT:PSS inks were prepared by simply mixing PEDOT:PSS aqueous and MoO3 ethanol suspension together. A core–shell structure was proposed in the MoO3:PEDOT:PSS hybrid ink, where PEDOT chains act as the core and MoO3 nanoparticles connected with PSS chains act as the composite shell. The mixing with PEDOT:PSS suppressed the aggregation of MoO3 nanoparticles, which led to a smoother surface. In addition, since the hydrophilic PSS chains were passivated through preferentially connection with MoO3, the stronger adhesion between MoO3 nanoparticles and the photoactive layer improved the film forming ability of the MoO3:PEDOT:PSS hybrid ink. The MoO3:PEDOT:PSS hybrid HTL can therefore be feasibly deposited onto the hydrophobic photoactive polymer layer without any surface treatment. The use of the MoO3:PEDOT:PSS hybrid HTL resulted in the optimized P3HT:PC61BM- and PTB7:PC61BM-based inverted organic solar cells reaching highest power conversion efficiencies of 3.29% and 5.92%, respectively, which were comparable with that of the control devices using thermally evaporated MoO3 HTL (3.05% and 6.01%, respectively). Furthermore, less HTL thickness dependence of device performance was found for the hybrid HTL-based devices, which makes it more compatible with roll-to-roll printing process. In the end, influence of the blend ratio of MoO3 to PEDOT:PSS on photovoltaic performance and device stability was studied carefully, results indicated that the device performance would decrease with the increase of MoO3 blended ratio, whereas the long-term stability was improved.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）