SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Jia Guo,Hang Li,Qian Ma,Qi Zhang,Yi Wang,Xueying Wang
The construction of tunable oxygen vacancies on the surface of materials has become an emerging approach to develop excellent gas sensitivity, in spite of the critical need for the influencing mechanism. In this paper, novel MoO 3 /CuMoO 4 self-assembled microspheres with superior gas-sensing performance to triethylamine (TEA) have been fabricated by a simple solvothermal route. The introduction of Cu 2+ plays a key role for the surface defects and morphological evolution of MoO 3 -based composites. The sensors based on MoO 3 /CuMoO 4 microspheres exhibit an optimal response of 240.1 toward 100 ppm TEA with fast response and recovery time (45/15 s) at a low operating temperature of 300 °C, together with the low detection limit of 500 ppb, good long-term stability and reliability, and remarkable selectivity for TEA. Actually, abundant oxygen vacancies as active sites greatly contribute to the increasing surface chemisorbed oxygen. The enhanced gas-sensing mechanism can be mainly ascribed from the combination of the formation of MoO 3 -CuMoO 4 heterojunctions , surface oxygen vacancies, and the self-assembled microstructure for the improved electron transfer behavior. The present work provides a new insight into the design of surface oxygen vacancies actuated gas sensors with unique surface/interface reactive process and transport mechanism.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Xiaogang Guo,Taotao Liang,Binfang Yuan,Jing Wang
Developing the thermal stability of metal-based ceramic composites or their films has always been challenging and bottlenecks for the utilization of energy. In this paper, the novel mesh-like functional Al doped-MoO 3 nanocomposite film with even distribution and high purity was firstly fabricated by the high-efficiency electrophoretic deposition and surface modification. The optimal suspension turned out to be the mixture of isopropanol and the additives of polyethyleneimine and benzoic acid. The microtopography, crystalline structure, environmental resistance and thermal stability were analyzed by field emission scanning electron microscope (FESEM), energy dispersive X-ray (EDX), X-ray diffractometer (XRD), exposure and droplet-impacting test, DSC analysis and ignition test, respectively. The water contact angle and sliding angle of product can reach ~170° and <1°, indicating the excellent anti-wetting property. In addition, the high heat-release (~3180 J/g) of product all kept almost unchangeable after six months exposure experiments, demonstrating the outstanding thermostability. The exquisite design idea here can perfectly match microelectromechanical system (MEMS), providing the valuable reference for fabricating other metal-based high-energy composites with long lifespan for real industrial applications.
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DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 53
·30163-30170
·
IF 2.936
Lei Feng,Gang Li,Yueer Yan,Wenrong Hou,Yahong Zhang,Yi Tang
The present work deals with the one-pot conversion of C6 sugars to methyl glycerate and glycolate via a cascade of retro-aldol condensation and oxidation processes catalyzed by using MoO3 as the Lewis acid catalyst and Au/TiO2 as the oxidation catalyst in methanol. Methyl glycerate (MGLY) is the product of C6 ketose (fructose), while methyl glycolate (MG) is produced from C6 aldose (mannose, glucose). It is found that a good one-pot match between two reactive processes is the key to the production of MGLY and MG with high yield (27.6% MGLY and 39.2% MG). A separated retro-aldol condensation and oxidation process greatly decreases their yields, and even no MGLY can be obtained in this separated process. We attribute this to high instability of glyceraldehyde/glycolaldehyde and their different reaction pathways which mainly depend on whether acetalization of retro-aldol products (glyceraldehyde and glycolaldehyde) occurs with methanol or not. This result opens a new prospect on the accumulation of C3 products other than lactate from biomass-derived carbohydrates.
研究领域:
化学工程
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催化
·
生物化学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 7
·1991-1998
·
IF 6.641
Jiaxin Zhang,Xiang Zhang,Haiwei Feng,Ziwei Yu,Jiaming Zhang,Shihao Liu,Letian Zhang,Wenfa Xie
At present, hybrid organic light-emitting devices (HyOLEDs) employing inorganic metal oxides as carrier injection/transport materials are widely studied because they are able to improve the poor stability of conventional devices. However, the stability can only be slightly improved by using a metal oxide as an electron transport layer as the base of the device. On the basis of the above-mentioned hybrid devices, we have successfully prepared a stable device by introducing an ultra-thick inorganic metal oxide MoO3 layer (105 nm) as a hole transport layer on top of the light-emitting layer to prevent erosion caused by moisture and oxygen in air. The luminance of the unpackaged device after storing in the atmosphere for 7 h is 8 times higher than that of conventional devices. In addition, due to the efficient hole injection ability and excellent carrier mobility of MoO3, even if the thickness of the device is significantly increased, the turn-on voltage is still lower than that of conventional devices. Moreover, electrons and holes are balanced in the device, so the efficiencies are significantly higher than those of conventional devices and HyOLEDs using inorganic metal oxides as electron transport layers.
研究领域:
材料科学
·
光电技术
·
有机电子学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 10
·650
·
IF 5.4
Kang Yujiao,Guo Hao,Yang Zeyun,Deng Meng,Xin Yu,Ren Jia,Wang Mingyue,Yang Wu
As a third-generation fluoroquinolone antibiotic, levofloxacin (LEV) residue in biological and environmental samples has aroused widespread public concern. In this work, NH 2 -UiO-66 was in-situ synthesized via a solvothermal route on MoO 3 surface. Subsequent covalent modification with ferrocene (Fc) afforded a ratiometric electrochemical sensor denoted as Fc-NH 2 -UiO-66/MoO 3 /GCE for LEV quantification. The anchored Fc units not only construct an internal self-calibration system with stable reference signal to greatly improve detection reliability, but also boost the electrical conductivity of the composite electrode. The as-fabricated sensor exhibits favorable analytical performance toward LEV, featuring a wide linear range of 0.6 µM-600 µM and a low limit of detection of 0.032 µM, together with stable anti-interference capability. Moreover, the developed electrode was successfully employed to determine LEV in practical specimens including serum, urine and commercial LEV eye drops. This reliable and sensitive analytical strategy exhibits promising prospects for clinical diagnosis and pharmaceutical analysis. Graphical abstract
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DOI
高影响因子
CATALYSIS LETTERS
·
2026
·Vol. 156
·期 10
·292
·
IF 2.5
Liu Xi,Wu Wenjian,Wang Ran,Li Rongkang,Li Yafei,Hou Jie,Xiao Fuquan,Zhu Linhua
Heterointerface engineering is a catalyst design strategy based on the symbiotic growth of heterogeneous metal oxides. This strategy endows electronic structures, surface properties, and generation of active centers that are unavailable in the individual oxides. It can even generate entirely new active sites, thereby significantly enhancing catalytic performance. Herein, we prepared MoO 3 @Cu x O with symbiotic MoO 3 and CuO as a catalyst for aerobic catalytic oxidative desulfurization. Notably, after symbiosis, the catalyst exhibits new low-valence Cu + active sites absent in the individual oxides, along with defective interfaces more favorable for catalytic reactions and enhanced surface redox properties. Catalytic testing validates these findings: these new low-valence Cu + active sites enable the activation of superoxide radicals, achieving 100% desulfurization of aromatic sulfur compounds under air atmosphere within 5 h. Through the rational design of symbiotic heterogeneous metal oxides, this study not only highlights the pivotal role of heterointerface engineering in catalytic oxidation but also offers an effective strategy for designing oxidative desulfurization catalysts. Graphical
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DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Yuqi Ma,Mingjiao Shao,Hongwei Sheng,Fengfeng Li,Lingxiao Ma,Jiao Yuan,Haoshuo Zhang,Huasheng Bi,Qing Yue,Daicao Wan,Ting Ma,Kairong Wang,Qing Su,Wei Lan
Molybdenum trioxide (MoO3), characterized by its abundant valence states and distinctive layered architecture, has emerged as a highly promising electrode material for potassium-ion (K+) storage. Nevertheless, its practical application in energy storage systems is significantly hindered by intrinsic limitations, including low electrical conductivity and inadequate electrochemical activity. In this study, we successfully synthesized silver-decorated MoO3 (Ag–MoO3) nanobelts through an innovative integration of electrochemical oxidation and hydrothermal techniques, achieving optimized morphology and structural properties. Comprehensive density functional theory (DFT) calculations revealed that the incorporation of Ag not only modified the electronic structure of MoO3 but also significantly enhanced its K+ adsorption capacity, thereby facilitating improved ion and electron transport kinetics. The engineered Ag–MoO3 electrode exhibited remarkable biocompatibility and superior energy-storage performance, demonstrating a specific capacitance of 442 F g–1 at a current density of 0.4 A g–1 in neutral aqueous electrolyte. Furthermore, the assembled asymmetric supercapacitor device achieved an extended operating voltage window of 0–1.8 V, delivering an impressive energy density of 38.4 Wh kg–1 at a power density of 182 W kg–1. These notable characteristics underscore the material’s exceptional potential for efficient K+ storage, positioning it as a promising candidate for next-generation biocompatible and environmentally sustainable electrochemical energy storage systems.
研究领域:
材料科学
·
电化学
·
能源存储
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DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Ying Tang,Dongsheng Xie,Xiaomin Guo,Lining Fang,Hui Zeng,Zebao Rui
Plasmonic photochemical N 2 fixation has received widespread attention owing to the attractive plasmonic enhancement effects in improving solar-to-NH 3 conversion efficiency. However, the weak N 2 adsorption affinity in metallic plasmonic photocatalysts and insurmountable interfacial barriers in metal–semiconductor plasmonic photocatalysts lead to rapid charge carrier recombination instead of participating in N 2 -to-NH 3 conversion. Herein, a photothermal catalyst Fe-dispersed MoO 3− x /MXene with synergistic plasmon resonance hybridization structure is fabricated for photothermal N 2 fixation. The hybrid plasmon resonance effects derived from MXene and MoO 3− x induce a strong optical response across the ultraviolet–visible-near-infrared range and generation of energetic charge carriers, and the induced photothermal effect further accelerates electron extraction, transport, and surface reaction kinetics. Moreover, the abundant oxygen vacancies and Fe sites can intensify the N 2 adsorption and donate the energetic electrons into the anti-bonding system for the stimulative N H coupling process. A high NH 3 formation rate of 87.1 μmol g −1 h −1 is achieved under solar-level illumination.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Hao Yang,Li Han,Dongrui Hou,Yongchang Liu,Shuaijun Huang,Zirui Peng,Zirui Yang,Tianliang Lu,Xiaoqin Si,Xin liu,Jinrong Li,Jianfeng Wang
A series of S-scheme heterojunctions, XCN@MoO 3 (XCN@M, X = Cl, Br, I), were synthesized via a simple thermal polymerization, and the effect of halogen doping on construction of S-scheme heterojunctions was systematically explored. The ICN@M heterojunction showed exceptional photocatalytic performance, achieving 100 % degradation of 50 mg/L RhB in 90 min, 40.37 times and 2.34 times higher than pure g-C 3 N 4 and CN@M, respectively. Notably, ICN@M outperformed CN@M and some other photocatalysts reported. DFT result revealed halogen doping reduced the work function of CN, proved the maximum work function difference of ICN@M and the formation of the strongest built-in electric field between the surface of MoO 3 with an electron-rich region and the surface of ICN with a hole-rich region, thus facilitating electron transfer at the heterojunction interface, reducing recombination of photogenerated carriers and promoting the catalytic performance. Fukui function and frontier orbital theory identified a possible degradation pathway of RhB dominated by ∙O 2 – and 1 O 2 and the toxicity of final products during the photocatalysis degradation of RhB was evaluated. This work highlighted the importance of work function differences in designing photocatalyst heterostructures and offered a new option for environmental treatment.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Qingyang Xi,Jinsong Liu,Zhengying Wu,Hongfei Bi,Ziquan Li,Kongjun Zhu,Jiajia Zhuang,Jixun Chen,Songlong Lu,Yanfang Huang,Guoming Qian
Photocatalysis has been rapidly developed as a sustainable technology to decompose contaminants by using photogenerated carriers excited through light irradiation . Electrons for molybdenum trioxide (MoO 3 ) semiconductor with wide band gap can be easily transferred to its conduction band via dye sensitization effect under visible light . However, MoO 3 still suffers from poor photocatalytic ability for organic dyes due to the low energy level of the conduction band and the insufficient utilization of the induced electrons. In this study, molybdenum dioxide (MoO 2 ) nanoparticles were decorated on the surface of MoO 3 nanobelts without requiring an additional Mo source by using a simple in-situ hydrothermal method . In the reaction process, the partial MoO 3 itself was reduced to metallic MoO 2 nanoparticles , and the resulting intimate interface between MoO 2 and MoO 3 could accelerate the transfer of dye sensitization-induced electrons. The as-prepared MoO 2 /MoO 3 nanocomposites exhibited extremely enhanced visible light photocatalytic activity for decomposing rhodamine B (RhB) with the assistance of H 2 O 2 . The mechanism for high-efficiency degradation was analyzed and explored by conducting theoretical calculations and designing further experiments. The high-efficiency degradation might be due to the synergistic effect caused by the well-matched energy band structure between dyes and MoO 3 , and the metallic MoO 2 nanoparticles , which can accelerate the production of hydroxyl radical ( OH) from H 2 O 2 . OH is a dominant reactive species for the degradation of RhB under visible light irradiation.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 48
·11449-11456
·
IF 5.066
Xiaolong Lu,Rongguo Wang,Lifeng Hao,Fan Yang,Weicheng Jiao,Jian Zhang,Ping Peng,Wenbo Liu
After UV irradiation of orthorhombic molybdenum trioxide (α-MoO3) nanosheets dispersed in two different solvents including water/ethanol mixed solvents and individual N-methyl-2-pyrrolidinone (NMP), we observed remarkable but distinct morphology changes in combination with different photochromic phenomena. MoO3−x quantum dots (QDs) with both different sizes and oxygen vacancy concentrations could be acquired through this facile and efficient method. The consumption of photoexcited holes played an important role in the morphology changes. In water/ethanol, intercalation of H+ originating from the oxidation of water by photoholes contributes to the acquisition of QDs. While in NMP, we provided a new insight and proved that photocorrosion induced by accumulated holes was responsible for the morphology evolution and acquisition of QDs.
研究领域:
材料科学
·
纳米技术
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Xingxing Fu,Piaoyun Yang,Xufeng Xiao,Di Zhou,Rui Huang,Xianghui Zhang,Fan Cao,Juan Xiong,Yongming Hu,Yafang Tu,Yanan Zou,Zhao Wang,Haoshuang Gu
Formaldehyde is one of the most serious threats to human health owing to the wide-spread of indoor decoration of modern buildings in recent years. The online monitoring of formaldehyde concentration of the indoor environment has become an urgent issue in modern society. In this work, an ultrafast and highly selective room-temperature formaldehyde gas sensor based on the semiconductor nanomaterials was developed. The Pt-decorated MoO 3 nanobelts were employed as the formaldehyde sensing materials, which were synthesized through hydrothermal and chemical reduction process. The results show that the Pt nanoparticles loading on the surface of the nanobelts are metallic and well crystalized. After the surface-decoration by Pt nanoparticles , the room-temperature HCHO sensing performance of the MoO 3 nanobelts could be greatly enhanced. With only 0.61% (atomic ratio) of Pt nanoparticles loading on MoO 3 , the sensor response towards 200 ppm of HCHO could be increased from 5.7% to 39.3%. The average response and recovery rate were also improved, leading to ultrafast response and recovery process at room temperature. At the LOD (limit of detection) of 1 ppm, the response and recover time of the sensor was only 8.8 s and 0.94 s, respectively. Furthermore, the Pt-decorated MoO 3 nanobelts also exhibited outstanding selectivity against other typical interference VOC including methylbenzene, methanol, ethanol and acetone, as well as good anti-interference performance towards water vapors . The great improvement of the sensor performance could be attributed to the spill-over and catalytic effect of Pt nanoparticles toward HCHO at room temperature.
研究领域:
材料科学
·
环境科学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）