Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yanli Zhang,Jian Li,Jianyu Cai,Shuangye Li,Xing Fan,Liyun Song,Ruixue Guo,Jiasheng Liu
In this study, a series of γ-Fe 2 O 3 -modified V 2 O 5 -MoO 3 /TiO 2 (VMT) catalysts was prepared by wet impregnation method. The γ-Fe 2 O 3 -modified catalysts exhibited excellent catalytic performance, and 1.25 wt% γ-Fe 2 O 3 content improved the deNO x efficiency at 150 °C from 54% (unmodified VMT catalyst) to 84% (modified catalyst). BET, XRD, XPS, NH 3 -TPD, H 2 -TPR, and in situ DRIFTs were employed to characterize the physicochemical properties and reaction mechanisms of the catalysts. The introduction of γ-Fe 2 O 3 increased the V 5+ /V 4+ ratio, surface chemisorbed oxygen content, redox ability, and a number of acid sites in the prepared catalysts. XPS confirmed the addition of γ-Fe 2 O 3 introduced new charge transfer pathways (Fe 3+ /Fe 2+ ↔ V 5+ /V 4+ ). In situ DRIFTs suggested that the addition of γ-Fe 2 O 3 to the catalyst significantly increased the adsorption capacity of catalyst for NH 3 and NO x , while also exerting a strong activating effect on the adsorbed NH 3 . Furthermore, selective catalytic reduction over the VMT and 5PEG@1.25Fe-VMT catalysts followed the Eley-Rideal (E-R) mechanism. At temperatures above 200 °C, the 5PEG@1.25Fe-VMT catalyst also followed the Langmuir-Hinshelwood (L-H) mechanism.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2020
·
IF 3.442
Jun Wang,Xiaofang Lei,Cong Huang,Lian Xue,Wei Cheng,Qiang Wu
Herein, a novel MoO 3 /Zn–Al LDHs composite photocatalyst was successfully prepared. Morphology, chemical composition, and photoelectrochemical properties of the prepared catalyst were explored by different characterization methods, including X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), Brunauer Emmett-Teller (BET), UV–Vis diffuse reflectance spectrometry (DRS) and Electron Spin Resonance (ESR). Using tetracycline as a target pollutant, the photocatalytic activity of MoO 3 (10 wt%)/Zn–Al LDHs composite was tested by photodegradation of tetracycline under visible light irradiation. The experimental results indicate that the MoO 3 (10 wt%)/Zn–Al LDHs composite exhibited higher photocatalytic removal efficiency than pure Zn–Al LDHs and MoO 3 . The removal efficiency of TC in 60 min could reach 90.5%. It was confirmed that the optimal conditions were a catalyst dosage of 1.0 g/L, an initial pH of 9, and an initial concentration of TC of 40 mg/L. In addition, a possible mechanism for the photodegradation of TC with MoO 3 (10 wt%)/Zn–Al LDHs composite was proposed. The introduction of MoO 3 facilitates the separation of electron-hole pairs. It could be seen that the MoO 3 (10 wt%)/Zn–Al LDHs composite has great application prospects for the treatment of antibiotic wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2021
·
IF 3.995
Li Huang,Yiqing Zeng,Yibo Gao,Hu Wang,Yuhao Zong,Zhengfeng Chang,Shule Zhang,Pei Han,Yang Yu
The oxidation of SO 2 into SO 3 promote the formation of NH 4 HSO 4 (ABS), which can cover surface active sites catalyst, and then leading to the decrease of NH 3 -SCR De-NO x activity. In this work, phosphorus species were loaded on the V 2 O 5 -MoO 3 /TiO 2 De-NO x catalyst to enhance its SO 2 resistance via inhibiting the SO 2 /SO 3 conversion. XRD and N 2 -adsorption results showed that phosphorus has little impact on the structure and pore property of the catalyst. The results of XPS , H 2 -TPR, and NH 3 -TPD analyses illustrated that suitable amount of phosphorus (1%) increases the content of polymeric vanadate and chemisorbed oxygen (O α ) of the catalyst, which is benefit to the SCR process. Phosphorus species decreases the SO 2 absorbability and SO 2 oxidation activity of V-Mo-P/Ti catalysts, thus it exhibits higher NH 3 -SCR activity than that of the P-free catalyst at presence of SO 2 due to the lower SO 2 /SO 3 conversion and fewer amount of NH 4 HSO 4 deposition.
研究领域:
环境科学
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催化化学
✓ 已验证
DOI
高影响因子
Nanomedicine-Nanotechnology Biology and Medicine
·
2024
·
IF 4.2
Jingyu Zhang,Xuexiao Li,Ming Cheng,Kaichen Wan,Shangcheng Yan,Wei Peng,Guangxin Duan,Yongyou Wu,Ling Wen
Surgical site infection (SSI) significantly affects patient recovery time, health outcomes and quality of life which is closely associated with the use of implants or mesh. Sutures are the most frequently used implants that play a significant role in the development of SSI. Studies have demonstrated that the administration of effective bactericidal and anti-inflammatory treatments can significantly decrease the incidence of SSI. To address this concern, a versatile suture was engineered by coating MoO 3-X nanodots in this study. The incorporation of MoO 3-X nanodots endowed the suture with desirable antibacterial and anti-inflammatory properties that were evaluated in in vitro and in vivo experiments. The results showed its remarkable ability to facilitate wound healing and prevent SSI through its dual action of combating bacterial infection and reducing inflammation. These findings highlight the promising potential of this multifunctional surgical suture as a versatile tool to promote better outcomes in surgical procedures.
研究领域:
生物医学工程
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材料科学
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外科手术
·
感染控制
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 16
·165403
·
IF 2.9
Yitong Guo,Qixun Xia,Yukai Chang,Libo Wang,Aiguo Zhou
In this work, a new MoO3@Mo2CTx nanocomposite was prepared from two–dimensional (2D) Mo2CTx MXene by in situ oxidization in air, which exhibited wonderful lithium-storage performance as anodes of lithium–ion batteries (LIBs). The precursor Mo2CTx was synthesized from Mo2Ga2C by selective etching of NH4F at 180 °C for 24 h. Thereafter, the Mo2CTx was oxidized in air at 450 °C for 30 min to obtain MoO3@Mo2CTx nanocomposite. In the composite, in situ generated MoO3 nanocrystals pillar the layer structure of Mo2CTx MXene, which increases the interlayer space of Mo2CTx for Li storage and enhances the structure stability of the composite. Mo2CTx 2D sheets provide a conductive substrate for MoO3 nanocrystals to enhance the Li+ accessibility. As anodes of LIBs, the final discharge specific capacity of the MoO3@Mo2CTx composite was 511.1 mAh g–1 at a current density of 500 mA g–1 after 100 cycles, which is about 36.7 times that of pure Mo2CTx MXene (13.9 mAh g–1) and 3.2 times that of pure MoO3 (159.9 mAh g–1). In the composites, both Mo2CTx and MoO3 provide high lithium storage capacity and can enhance the performance of each other. Moreover, this composite can be made by a facile method of in situ oxidation. Therefore, the MoO3@Mo2CTx MXene nanocomposite is a promising anode of LIB with high performance.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2016
·
IF 3.349
Lijun Xue,Di Zhang,Yongqiang Xu,Xinmei Liu
γ-Al 2 O 3 without amorphous domains was synthesized by cation-anion double hydrolysis method. The mesopore size in the range of 3.9–8.5 nm was easily controlled by regulating crystallization temperature, solution pH value and the concentration of NaAlO 2 . The introduction of MoO 3 to the γ-Al 2 O 3 via impregnation method can lead to a decrease of specific surface areas, pore sizes and pore volumes of the supports. The less steric hindrance of the larger mesopores (particularly 8.5 nm) exhibits the more Lewis acid sites over the γ-Al 2 O 3 . The MoO 3 /γ-Al 2 O 3 possesses more Bronsted acid sites compared to Lewis. The thiophene compounds can be adsorbed both on the supports and catalysts. The acid sites can facilitate the interaction between the thiophene compounds and catalysts (or supports). The more adsorbed thiophene and dibenzothiophene on the catalysts is attributed to the coordinately unsaturated metal sites and Bronsted acid sites on the surface of the catalysts. Of note is the supports and catalysts with larger pore size (especially 8.5 nm) could promote the adsorption of thiophene compounds. It demonstrates that there is pore confinement effect in the hydrodesulfurization catalysts.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Ruixue Li,Peng Song,Zhenyuan Ji,Hu Zhou,Xiaoping Shen,Lirong Kong,Aihua Yuan
MXene film-derived flexible supercapacitors have shown great application foreground for wearable electronics, but the capacitive characteristics, especially when faced with mechanical deformations, are not satisfactory. Herein, a new kind of flexible electrode, MX/D-MoO 3 , is developed by using Ti 3 C 2 T x MXene film (MX) and defect-rich MoO 3 (D-MoO 3 ) as the “main body” and “spacer-contributor”, respectively. Results indicate that, with D-MoO 3 intercalation, notably enlarged layer spacing of Ti 3 C 2 T x nanosheets and boosted electrochemical active sites are fulfilled, which have facilitated wondrous property increases of 342% and 239% when compared to raw MX and MX/MoO 3 , respectively. Particularly, MX/D-MoO 3 -60 has a high specific capacitance of 2734.3 mF cm −2 at 1 mA cm −2 , which surpasses most of the counterparts reported thus far. The MX/D-MoO 3 -60-based all-solid-state supercapacitor presents the largest energy density of 96.3 µWh cm −2 at 205.9 µW cm −2 and an outstanding power density of 1871.4 µW cm −2 at 18.6 µWh cm −2 . Meanwhile, impressive stability with capacitance retention of 91.8% after 5 000 cycles and great mechanical flexibility with capacitance retention of 90.3% under bending angles from 0 to 180° are also exhibited. The superior properties and facile preparation endow MX/D-MoO 3 -60 with promising applications in wearable energy storage.
研究领域:
材料科学
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能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2023
·
IF 5.1
Onome Ejeromedoghene,Olayinka Oderinde,Sheriff Adewuyi,Guodong Fu
Recently, the fabrication of functional and stimuli-responsive hydrogels using deep eutectic solvent derivatives is gaining tremendous scientific recognition owing to their unique self-switching properties. In this study, perfluorinated deep eutectic mixtures were prepared as the template for the synthesis of WO 3 /MoO 3 composites. The metal oxide-based composites were further employed as a chemical crosslinking agent for the polymerization of polyvinyl pyrrolidine (PVP) and acrylamide (Am), for the construction of (PVP-Am)/WO 3 /MoO 3 hydrogel composites. The hydrogels displayed unique morphologies and mechanical properties . The hydrophilic nature of hydrogels as well as the high concentration of dispersed WO 3 /MoO 3 composites in the polymer network contributes to their photochromic activity and allows an immediate coloration upon exposure to light at a short time. Howbeit, the low concentration of the dispersed WO 3 /MoO 3 composites in the dry glass membrane is responsible for the blue coloration and an extended time of photochromic response. In addition, the electrochromic behavior of the hydrogel composites displayed a strong quasi-rectangular shape potential window as well as a well-defined redox cyclic voltammetry curve when exposed to high voltage. This could be due to the photoredox property of the WO 3 /MoO 3 composites responsible for charge transfer between the different oxidation states.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 21
·期 34
·5106-5114
·
IF 3.382
Ying Cao,Huixiang Wang,Xiaobo Ren,Fan Li,Jing Wang,Ruimin Ding,Liancheng Wang,Jianbo Wu,Zhong Liu,Baoliang Lv
Herein, MoO3 nanowires (Fe–MoO3 NWs) along the [110] direction were successfully synthesized in the presence of Fe3+ cations. The Fe–MoO3 NWs present a large specific surface area of 174.7 m2 g−1 and rich surface –OH groups, and the possible formation mechanism of such a structure is due to the adsorption of Fe3+ cations toward non-(110) planes of MoO3 in solution with pH greater than its isoelectric point. The obtained Fe–MoO3 NWs show excellent and highly selective adsorption capacity toward quasi-phenothiazine dyes (methylene blue, toluidine blue, azure I, and acridine orange). The dye removal rate could reach 99% in 3 min, and the maximum adsorption capacity is up to 144.3 mg g−1 and the adsorption is up to 28.86 mg g−1 per minute, which is 11 times greater than that of pure MoO3 and far greater than that of the recently reported MoO3 nanostructures. This excellent selective adsorption performance of Fe–MoO3 NWs was mainly attributed to the enhanced chemical adsorption of quasi-phenothiazine dyes by rich surface –OH groups and Fe species through hydrogen bond and coordination bond adsorption with N and S, respectively, which was confirmed by adsorption isotherms and adsorption kinetics. These results suggest the potential application of Fe–MoO3 NWs in the field of water pollution treatment.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 47
·22173-22179
·
IF 7.233
Kai Li,Jingwen Ma,Xinglong Guan,Hongwei He,Min Wang,Guoliang Zhang,Fengbao Zhang,Xiaobin Fan,Wenchao Peng,Yang Li
Electrolyzing water as a sustainable energy source is a promising and appealing method to resolve the environmental crisis. Developing efficient and stable bifunctional electrocatalysts for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) is crucial and challenging in the overall water splitting process. Herein, we report the synthesis of Ni(PO3)2–MoO3 nanorods anchored on nickel foam (Ni(PO3)2–MoO3/NF) within a two-step strategy and their application as a bifunctional water splitting electrocatalyst. The results show that the optimal Ni(PO3)2–MoO3/NF electrodes exhibit superior catalytic activity with robust durability and ultralow overpotentials of 86 mV for HER and 234 mV for OER to achieve 10 mA cm−2 (η10) in alkaline solution. The favorable performance of the obtained catalyst is attributed mainly to the synergetic effect between Ni(PO3)2 and MoO3, as well as the self-supporting porous conductive substrate. As a result, the integrated Ni(PO3)2–MoO3/NF electrodes deliver η10 at a small potential of 1.47 V for overall water splitting, highlighting a promising application as a bifunctional electrocatalyst.
研究领域:
材料科学
·
电化学
·
能源催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Lifeng Zhang,Shuai Li,Huan Ruan,Bangmei Lu,Kai Wang,Shouwu Guo
Developing Silicon (Si) based flexible and freestanding anodes is crucial for future wearable lithium ion batteries (LIBs) with satisfiable energy density. Improving the poor conductivity and unstable structure of Si in the lithiation/delithiation processes is a significantly important challenge. In this work, we synthesized flexible composites MoO 3 /Si@CFNT, in which MoO 3 as a decorative layer and Si nanoparticles are well encapsulated into carbon fiber nanotube (CFNT). As freestanding lithium ion battery (LIB) anodes, the as-synthesized MoO 3 /Si@CFNT composites exhibit excellent Li + storage performance for both half-cell and full-cell (610 mAh g −1 @200 cycles at 0.2 A g −1 for half-cell and 159 mAh g −1 @100 cycles at 0.5 A g −1 , with a capacity retention rate of 85.9 % and almost 99 % coulombic efficiency for full-cell). We demonstrated that CFNT reserves sufficient space for the volume change of Si caused by lithiation, meanwhile, the enhanced interface protection of freestanding Si anodes in CFNT was achieved by introducing MoO 3 buffering layers. Furthermore, we revealed the ion/electron transport kinetics of MoO 3 /Si@CFNT flexible electrode by GITT and ex-situ EIS measurements. This work offers a good example and inspiring insights into the design of many other Si based flexible anodes.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2022
·Vol. 7
·期 43
·e202202460
·
IF 2.307
Guohao Xu,Jiale Zhu,Xuedong Zhu
Graphical Compared with the microporous system of MoO 3 /ZSM-5 synthesized by the the physically-blended method, the micro-mesoporous system of ZSM-5@MoO 3 with a core-shell reaction pathway of Mo-acid sites tandem could accelerate the rate of the mass-transfer, promoting aromatization reaction. A novel core-shell ZSM-5@MoO 3 catalyst was successfully synthesized by the hydrothermal coating strategy, and its physicochemical properties and catalytic properties in methane aromatization were investigated using a physically-blended ZSM-5/MoO 3 catalyst as a comparison. Multitechniques including XRD, SEM, TEM, EDS, N 2 adsorption, ICP, IR and IG were employed to investigate the characteristics of methane aromatization reaction and the deactivation of carbon deposits. At the reaction temperature of 700 °C and a space velocity of 2400 mL g −1 h −1 , methane conversion and aromatics selectivity of the core-shell ZSM-5@MoO 3 catalyst were 11.3 % and 88.1 %, respectively, which were higher than those of the physically-blended ZSM-5/MoO 3 catalyst by 3.1 % and 14.8 %, respectively. The special reaction pathway of core (ZSM-5, acid sites)-shell (MoO 3 , Mo sites) and the relatively close proximity between MoO 3 and ZSM-5 were mainly responsible for the excellent properties in the methane aromatization reaction. At the same time, the formation of the micro-mesoporous property accelerated the mass-transfer rate and inhibited the formation of carbonaceous deposition, greatly improving the stability of methane aromatization. Thanks to its core-shell structure, ZSM-5@MoO 3 catalyst showed the excellent properties in methane aromatization.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）