IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
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2025
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IF 5.9
Fanli Meng,Weijia Cui,Yang Liu,Yanbai Shen,Zhenyu Yuan
In view of the poor sensitivity and upper detection limit of triethylamine gas sensors, high performance triethylamine sensor was prepared by adjusting the crystalline phase of MoO3. In this work, the orthorhombic phase MoO3 nanobelts were synthesized through hydrothermal method and used for the detection of triethylamine. The experimental outcomes indicate that the orthorhombic phase MoO3 gas sensor exhibits the peak responsiveness, which reaches 774.47 when the concentration of triethylamine is 100 ppm at 220°C accompanied by a theoretical detection threshold as minute as 10 ppb. The orthorhombic phase MoO3 sensor has superior selectivity for triethylamine stemming from the robust Lewis acid-base interplay with MoO3 and triethylamine and the C-N of triethylamine is easily broken. Finally, the sensing mechanism of orthorhombic phase MoO3 gas sensor is deeply analyzed. Since orthorhombic phase MoO3 possesses a narrow band gap and small size effect, and has a high adsorption energy for triethylamine, the gas sensor exhibits excellent performance. The strategic design of crystalline phase modulation serves as a pivotal approach to enhancing the properties of gas sensors.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Guang Miao,Peng Chong,Cuiting Yang,Zewei Liu,Hao Yu,Lei Dong,Guoqing Li,Jing Xiao
The demand for heterocyclic sulfur compounds is increasingly in fine chemical industry, where the thiophenic sulfur impurities in fuels can be a potential recyclable feedstock. In this work, the catalytic upgrading of thiophenic sulfur compounds over a silver-modified MoO 3 catalyst under ambient conditions was reported. Br 2 and H 2 O 2 /HBr were used to convert thiophenic compounds in alkane and alcohol solutions. The conversion of various thiophenic compounds (thiophene, benzothiophene and dibenzothiophene) to the corresponding bromides reached up to 81.6 ~ 99.8%. The bromination path undergoes electrophilic substitution mechanism, and the transformation of mono- to dibromides is identified as the rate-determining step. The introduction of MoAg 2 O 4 phase on MoO 3 is rationalized to boost the conversion of mono-bromothiophene, which results in the selectivity of 2,5-dibromothiophene increased from 10% to over 50%. The optimized silver loading was 10% due to its high thiophene conversion and selectivity of dibromides. Silver modification of MoO 3 rods not only stabilized the textural property of catalysts but also improved its bromination activity compared to the bulk MoO 3 indicated by SEM and FTIR characterization. Density functional theory (DFT) calculation suggested that the formation of 2-bromothiphene and 2,5-dibromothiophene were preferred on the MoO 3 (111) and MoAg 2 O 4 (111) sites, respectively. The catalytic upgrading approach paves the way for the efficient utilization of thiophenic sulfur impurities in fuels to their value-added under mild conditions.
研究领域:
化学工程
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 5
·055041
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IF 1.449
Yixue Li,Zhongxiao Song,Yanhuai Li,Sha Li,Hairong Wang,Baorui Song,Bo Gao,Xiaoye Du
In the present work, Mo4O11 @MoO3 nanobelts are successfully prepared by a two-step hydrothermal method. The nanobelts are about several micrometers in length and 200–300 nm in width with Mo4O11 nanoparticle on surface. The introduction of nanoparticles act as the adsorption sites which facilitate the adsorption of O2 and NO2 gas molecules, because of the point defects such as Mo5+ ions and oxygen vacancies inducing to increase the concentration of carriers, which synthetically contribute the sensing performance enhancement. The Mo4O11@MoO3 nanobelts show excellent sensing performance with 6 times enhancement with the decreased working temperature comparing with the pure α-MoO3 nanobelts. This study indicate that this kind of sensor show a promising application in NO2 detection.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
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2020
·Vol. 49
·期 9
·5346-5352
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IF 1.774
Yang Zhongxiang,Du Xiaoni,Shang Zhichao,Ren Xuanru,Shen Chengjin,Wang Xiaohong
In this study, we synthesized Bi 2 Mo 3 O 12 and Bi 2 Mo 3 O 12 /MoO 3 composites through a simple solution combustion synthesis (SCS) route. The structure, morphology, and photocatalytic property for the degradation of Congo Red (CR) were characterized by x-ray diffraction, scanning electron microscopy (SEM), x-ray photoelectron spectroscopy and ultraviolet–visible spectrophotometer absorption spectroscopy. The phases of the samples were characterized to be Bi 2 Mo 3 O 1 and Bi 2 Mo 3 O 12 /MoO 3 . The SEM results showed Bi 2 Mo 3 O 12 particles were uniformly distributed on the MoO 3 sheets. Bi 2 Mo 3 O 12 and MoO 3 in the Bi 2 Mo 3 O 12 /MoO 3 composites were clearly demonstrated by the lattice spacing from high-resolution transmission electron microscopy results. The maximum degradation rate of Bi 2 Mo 3 O 12 /MoO 3 composite was 83% at 60 min, showing excellent photocatalytic performance. A possible mechanism is proposed for the degradation of CR over Bi 2 Mo 3 O 12 /MoO 3 composites, in which h + and ·O 2− are the main active species and play an important role in the degradation of pollutants.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
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IF 8.3
Wanlun Jiang,Meng Su,Yangong Zheng,Teng Fei
Resistive humidity sensors are required in flexible and integrated devices. Two-dimensional MoO3 offers a large interface area, enabling the modulation of its electrical properties over a wide range. In this study, 2D MoO3 was synthesized via liquid-phase exfoliation for humidity-sensing tests. In terms of high sensitivity, negligible hysteresis, linearity, and stability, the humidity-sensing performance of MoO3 is superior to those of other materials. The sensitivity reaches 9794 Ω/RH at 25 °C. The sensing mechanism of MoO3 was investigated by using impedance spectra and voltage–current scans under different humidity levels. The results indicate that the resistance change of MoO3 due to humidity originates from the interfacial conductance. Interfacial H2O adsorption induces efficient conducting paths via hydrogen bonding, decreases the potential barrier for electron transfer, and supplies additional electron states to the valence bands. In this study, electronic humidity sensing was investigated in depth, and a new perspective was proposed for electronic humidity sensing.
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
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2019
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IF 4.63
Ying Cao,Huixiang Wang,Ruimin Ding,Liancheng Wang,Zhong Liu,Baoliang Lv
Ni modified MoO 3 (Ni-MoO 3 ) had been synthesized by a facile one-step hydrothermal technique and was used for oxidative desulfurization (ODS) of dibenzothiophene (DBT) in the decalin/acetonitrile biphasic system with H 2 O 2 as oxidant, the effect of different operating conditions was investigated. Under the optimal reaction condition, Ni-MoO 3 catalyst showed excellent ODS performance toward DBT, the highest sulfur removal efficiency can be up to 99.8% and sulfur content was wiped out from 5000 to 10 ppm, which is more effective than the recent reported MoO 3 -based catalysts. The reaction kinetics obeyed the pseudo-first-order equation with an apparent rate constant of 0.076 min −1 , which is twice that of pure MoO 3 (0.035 min −1 ). The ODS mechanism of DBT with Ni-MoO 3 was explored by combining radical scavenger, FT-IR experiments and theoretical analysis, proving that surface oxygen vacancies and Lewis acid sites play important roles in the high-efficiency ODS reaction with Ni-MoO 3 catalyst.
研究领域:
催化化学
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环境化学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Fengye Guo,Wenhua Li,Yefan Liu,Qianqiao Chen,Qin Zhong
Transition metal phosphides with excellent performance are one of the effective alternatives to noble metal catalysts in overall water splitting. In this paper, the Fe–NiCoP–MoO3 composite was prepared by a facile synthesis as the bifunctional electrocatalyst. Fe–NiCoP–MoO3 achieves an operating current density of 10 mA/cm2 at a low overpotential of 65 mV for hydrogen evolution reaction and drives an operating current density of 50 mA/cm2 at only 293 mV for oxygen evolution reaction. Significantly, Fe–NiCoP–MoO3 was employed as the anode and cathode for overall water splitting, which only requires a cell voltage of 1.586 V to reach 10 mA/cm2 as well as shows excellent stability. The electrocatalytic activity of Fe–NiCoP–MoO3 exceeds most of the recently reported typical bifunctional electrocatalysts. This may be due to the coupling effect between the polymetallic phosphides. In addition, heterogeneous catalysts generally expose more active sites than homogeneous catalysts. In addition, replacing MoO3 with WO3 and VO3 can also improve the performance of Fe–NiCoP. This work provides an idea for the modification of phosphides.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2018
·Vol. 102
·期 6
·3307-3317
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IF 2.956
Dandan Zhang,Jing Li,Jianye Liang,Heping Li,Youwei Yan
We report α-MoO 3 flowers as a highly effective organics adsorbent for the first time. With α-MoO 3 microfibers (MFs), α-MoO 3 flowers uniformly self-assemble on a carbon cloth, serving as a great organics scavenger. They not only provide a high specific surface area but also possess van der Waals force, both of which guarantee a high adsorption efficiency for multiple organics. Nearly 100% of Rhodamine B (RhB), methylene blue (MB), and crystal violet (CV) are rapidly adsorbed while flowing through the designed α-MoO 3 flower-based filtration device. Even after five recycling times, its high adsorption efficiency toward RhB remains unaffected. The adsorption capacity of α-MoO 3 flowers for RhB, MB, and CV reaches up to 4974, 6217, and 3886 mg/m 2 , respectively. Additionally, this novel adsorbent can adapt to a wide pH range, maintaining the excellent capacity of 4774 and 4473 mg/m 2 toward RhB at pH of 2.0 and 12.0. The α-MoO 3 flowers can also adsorb other organics, including MO, noroxin, and tetracycline hydrochloride. Moreover, the free-standing α-MoO 3 flowers on a carbon cloth realize the adsorptive filtration for organics removal, which not only require no conditions and no energy consumption but also avoid secondary pollution to the water as compared to the powdery adsorbents.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Wenhui Zhu,Ali Reza Kamali
Metastable monoclinic molybdenum trioxide (β-MoO 3 ) combined with perfect hexagonally-shaped MoS 2 and graphene nanosheets are fabricated by facile mechanochemical-molten salt treatment of irregularly-shaped molybdenum disulfide (MoS 2 ) and graphite in air. This hybrid nanostructure exhibits an excellent Li-ion storage performance, outperforming the nanocomposites made of conventional orthorhombic α-MoO 3 . To this end, ball-milled MoS 2 and graphite are treated in the presence of sodium chloride (NaCl) at 900–1200 °C, leading to the preparation of MoS 2 /MoO x @graphene (MSO@G) nanocomposites in an easily scalable and affordable way. The formation of β-MoO 3 is realized at 1100 °C (MSO@G-1100), outperforming the electrochemical performances of other samples and the initial MoS 2 . Moreover, the influence of binder on the electrochemical performance of MSO@G-1100 is studied, based on which polystyrene acrylic-acrylate (SAE) is found to provide a considerably low charge transfer resistance (27.59 Ω), outperforming conventional binders. The electrode exhibits a reversible Li-ion storage capacity of 878 mAh g −1 after 245 cycles at the current density of 100 mA g −1 . The capacitive contribution to the total Li-ion energy storage performance of MSO@G-1100/SAE is found to be significant with the value of around 62% at the potential scan rate of 0.3 mV s −1 . This article report on the facile, clean and sustainable preparation of β-MoO 3 based nanocomposites with remarkable electrochemical performance.
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
Nanomaterials
·
2022
·Vol. 12
·期 9
·1422
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IF 5.719
Zihan Guo,Dong Wang,Zhiwei Wang,Yanfang Gao,Jinrong Liu
Replacing the commercial graphite anode in Li-ion batteries with pseudocapacitor materials is an effective way to obtain high-performance energy storage devices. α-MoO3is an attractive pseudocapacitor electrode material due to its theoretical capacity of 1117 mAh g−1. Nevertheless, its low conductivity greatly limits its electrochemical performance. MXene is often used as a 2D conductive substrate and flexible framework for the development of a non-binder electrode because of its unparalleled electronic conductivity and excellent mechanical flexibility. Herein, a free-standing α-MoO3/MXene composite anode with a high specific capacity and an outstanding rate capability was prepared using a green and simple method. The resultant α-MoO3/MXene composite electrode combines the advantages of each of the two components and possesses improved Li+diffusion kinetics. In particular, this α-MoO3/MXene free-standing electrode exhibited a high Li+storage capacity (1008 mAh g−1at 0.1 A g−1) and an outstanding rate capability (172 mAh g−1at 10 A g−1), as well as a much extended cycling stability (500 cycles at 0.5 A g−1). Furthermore, a full cell was fabricated using commercial LiFePO4as the cathode, which displayed a high Li+storage capacity of 160 mAh g−1with an outstanding rate performance (48 mAh g−1at 1 A g−1). We believe that our research reveals new possibilities for the development of an advanced free-standing electrode from pseudocapacitive materials for high-performance Li-ion storage.Keywords:free-standing electrode;α-MoO3/MXene composite anode;high capacity;electrochemical energy storage
研究领域:
材料科学
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能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2021
·
IF 3.605
Kun-Lang Lu,Xian-Yong Wei,Guang-Hui Liu,Wei-Wei Yan,Fan Yin,Fa-Zhan Mao,Feng-Hua Wei,Zhi-Min Zong,Hong-Cun Bai
Benzyloxybenzene (BOB) and oxybis(methylene)dibenzene (OBMDB) were used as lignin-related model compounds (LRMCs). Three protic solvents (PSs), i.e., methanol, ethanol (E), and isopropanol, and two aprotic solvents (ASs), i.e., ethyl acetate and n-hexane, were selected to evaluate their effects on the catalytic hydroconversion (CHC) of the LRMCs over MoO3. Under the same conditions, the PSs are more effective for the CHC of LRMCs than the ASs. Under the optimal conditions in E, both BOB and OBMDB are completely converted and the total product yields are 200 and 198.1 mol %, respectively. MoO3 undergoes the surface modification, such as carburization and oxygen vacancy (OV) formation, during the reaction, which is crucial for the CHC of the LRMCs. The OV formation is determined by the self-transformation degree of PSs and the dispersity of ASs to MoO3 through the analyses of solvent-related environmental variables. In addition, solvents affect the CHC of LRMCs by controlling the adsorption performance of MoO3.
研究领域:
化学工程
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
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2019
·Vol. 9
·期 37
·21473-21477
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IF 3.049
Qianfan Yang,Jiasheng Wang,Wan-Hui Wang,Ming Bao
Subnano MoO3/MCM-41 was successfully prepared through doping (NH4)6Mo7O24 in the synthesis process of MCM-41. The morphology of MoO3/MCM-41 was visually observed by TEM and HADDF-STEM. N2 sorption, XPS and Raman were further applied to investigate the structure of the material. MoO3/MCM-41 was used in the oxidative desulfurization process with tert-butyl hydroperoxide as oxidant. MoO3/MCM-41 showed outstanding catalytic activity and recycling ability at room temperature.
研究领域:
材料科学
·
环境化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）