ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Miaomiao Hu,Jiafeng Zhu,Wenyao Guo,Qunjie Xu,Yulin Min,Jinchen Fan
Photocatalytic water splitting to produce hydrogen is considered to be a promising approach to clean, sustainable, and renewable energy. The highly efficient photocatalysts play a key role in photocatalytic hydrogen production. Owing to its high charge carrier mobility and tunable band gap, black phosphorus (BP) has emerged as a potential photocatalyst. However, when using BP for photocatalytic hydrogen production individually, the inherent instability and light-harvesting capability greatly restricted the further application, as well as the fast photogenerated electron–hole recombination. Herein, a novel heterostructured photocatalyst BP-MoO3–x was prepared via the direct ball-milling method for H2 photogeneration. The result demonstrated that coupling BP with the localized surface plasmonic defective MoO3–x through covalent Mo–P bond improves the chemical stability, enables the visible-to-near infrared photons to harvest, and promotes the photogenerated carrier separation. As a result, the BP-MoO3–x could deliver high photocatalytic hydrogen production rates of 396.3 and 156.4 μmol·g–1·h–1 under visible and near-infrared lights, which are ∼40 and 80 times higher than that of BP without any sacrificial agent, respectively. Furthermore, the BP-MoO3–x also shows good stability under visible light irradiation from cycle stability testing. Combining with density functional theory (DFT) calculations, the synergistic effect of Z-scheme BP-MoO3–x heterostructure and strong localized surface plasmon resonance (LSPR) enhances light-harvesting capacity and improves the photoexcited charge transfer efficiency.
研究领域:
材料科学
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化学
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能源科学
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纳米技术
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产品关联
DOI
高影响因子
Reaction Chemistry & Engineering
·
2023
·Vol. 9
·期 1
·70-81
·
IF 3.9
Yuxuan Shao,Dan You,Yuqi Wan,Qingrong Cheng,Zhiquan Pan
The activation capacity of molecular oxygen is an important indicator to evaluate the photocatalytic efficiency of a catalyst. In this paper, MoO3−x nanosheets with oxygen vacancies were deposited on WO3 nanoflowers to form a WOM heterojunction, which improved the photocatalytic performance and molecular oxygen activation ability of the catalyst. This novel WOM heterojunction exhibited excellent photoactivity for degrading rhodamine B (RhB), photocatalytic water splitting ability and molecular oxygen activation ability under sunlight irradiation. Among all the samples, WOM83% could degrade 98% of 30 ppm RhB in 40 min. Meanwhile, WOM83% exhibited the highest hydrogen generation rate (4214.2 μmol h−1 g−1) and the strongest TMB oxidation capacity, and can generate 2.23 μmol of ·O2− in 50 min. The enhanced photocatalytic performance via heterojunction construction may be attributed to these following reasons: (i) higher light absorption achieved by the MoO3−x and WO3 composite; (ii) the matched energy band gap of MoO3−x and WO3 led to higher photogenerated carrier mobility; (iii) MoO3−x with oxygen vacancies as electron traps suppressed the photogenerated carrier recombination; (iv) enhanced molecular oxygen activation ability of the WOM heterojunction, such as the production of ·O2−. The measurements for TMB photo-oxidation and ·O2− showed excellent molecular oxygen activation ability of WOM heterojunctions. Finally, a possible photocatalytic mechanism was proposed. This study provided a viable option for the application of materials with oxygen vacancies to remove pollutants and improve molecular oxygen activation ability.
研究领域:
材料科学
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光催化
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环境科学
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纳米技术
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2019
·Vol. 7
·期 12
·2032-2042
·
IF 5.047
Atheer Hameid Odda,Youcui Xu,Jun Lin,Gang Wang,Naseeb Ullah,Akif Zeb,Kuang Liang,Long-ping Wen,An-Wu Xu
Development of near infrared (NIR) light-responsive nanomaterials for high performance multimodal phototherapy within a single nanoplatform is still challenging in technology and biomedicine. Herein, a new phototherapeutic nanoagent based on FDA-approved Prussian blue (PB) functionalized oxygen-deficient molybdenum oxide nanoparticles (MoO3−x NPs) is strategically designed and synthesized by a facile one-pot size/morphology-controlled process. The as-prepared PB-MoO3−x nanocomposites (NCs) with a uniform particle size of ∼90 nm and high water dispersibility exhibited strong optical absorption in the first biological window, which is induced by plasmon resonance in an oxygen-deficient MoO3−x semiconductor. More importantly, PB-MoO3−x NCs not only exhibited a high photothermal conversion efficiency of ∼63.7% and photostability but also offered a further approach for the generation of reactive oxygen species (ROS) upon singular NIR light irradiation which significantly improved the therapeutic efficiency of the PB agent. Furthermore, PB-MoO3−x NCs showed a negligible cytotoxic effect in the dark, but an excellent therapeutic effect toward two triple-negative breast cancer (TNBC) cell lines at a low concentration (20 μg mL−1) of NCs and a moderate NIR laser power density. Additionally, efficient tumor ablation and metastasis inhibition in a 4T1 TNBC mouse tumor model can also be realized by synergistic photothermal/photodynamic therapy (PTT/PDT) under a single continuous NIR wave laser. Taken together, this study paved the way for the use of a single nanosystem for multifunctional therapy.
研究领域:
生物医学工程
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纳米技术
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癌症治疗
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材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Luozeng Zhou,Sipeng Huang,Tingting Han,Yiting Peng,Feipeng Cai,Tongtong Xu,Jincheng Du,Zhenhe Feng,Linsen Li,Qunjie Xu
The layered lithium nickel-rich cathodes have become one of the most promising candidates for next-generation lithium-ion batteries with high energy density , However, the nickel-rich cathode suffers from a rapid decay of capacity due to their intrinsic instability and undesirably residual lithium compounds originated from LiNiO 2 structural changes on the surface, hindering large-scale commercial application. Herein, a continuous and uniform oxygen vacancy enriched-MoO 3-x coating was successfully synthesized and reacted residual lithium compounds as a functional layer on the cathode. Such chemically reconstructed coating (Li 2 MoO 4 ) strategy endows the 1 wt% MoO 3-x coated NCA cathode with a fast Li + ions transport and enhanced structural stability , leading to an outstanding discharge capacity of 214.0 mAh g −1 at 0.1C (1C = 270 mA g −1 ), a better capacity retention of 80.3 % after 120 cycles at 0.5C, and an excellent high rate capability of 120 mAh g −1 at 5C cycled in voltage range of 2.75 V–4.3 V. This work provides an effective strategy to modulate surface structure towards advanced Ni-rich cathodes for high-performance lithium-ion batteries.
研究领域:
材料科学
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电化学
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储能技术
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表面工程
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纳米技术
✓ 已验证
DOI
高影响因子
Solar RRL
·
2023
·Vol. 7
·期 10
·2300023
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IF 7.9
Yaju Wei,Guoqiang Yu,Guohui Luo,Wang Fu,Wuqi Liu,Tao Wang,Haonan Xu,Xiaoping Wu,Lingbo Xu,Ping Lin,Xiaodong Zhu,Xuegong Yu,Peng Wang,Can Cui
Molybdenum oxide (MoO 3− x , x < 3) has been successfully used as an efficient hole-selective contact material for crystalline silicon heterojunction solar cells. The carrier transport capability strongly depends on its work function, that is, oxygen vacancies; however, there are lack of effective methods to modulate the multiple oxidation states. Herein, the oxidation states of solution-processed MoO 3− x by doping Nb 5+ to improve its hole-selective contact performance with silicon are tuned. With the optimum doping concentration of 5%, both the reduced Mo 5+ and oxygen vacancies increase, resulting in a decrease in the contact resistivity between the MoO 3− x film and p -type silicon from 161.1 to 62.9 mΩ·cm 2 and an increase of the effective carrier lifetime from 165.4 to 391.0 μs simultaneously. Similarly, the doping of Ta 5+ or V 5+ in MoO 3− x improves the passivated contact performance with silicon, while the former increases the concentration of oxygen vacancies and the latter reduces it. The solar cell with the structure of Ag/MoO 3− x :Nb/ p -Si exhibits a conversion efficiency of 18.37%, which is the highest so far reported for the solution-processed MoO 3− x /silicon heterojunction. This work demonstrates a feasible strategy of tuning hole selectivity in MoO 3− x by doping for high-efficiency solar cells and other optoelectronic device applications.
研究领域:
材料科学
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光伏技术
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半导体物理
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·
IF 19
Ying Fang,Yang Yu,Xiaoyan Jiang,Peilai Liu,Yu Chen,Wei Feng
Residual tumor cells and bone tissue defects are two critical challenges in clinical osteosarcoma treatment. Herein, a subnanomedicine concept is proposed by developing a self-adaptive functional tissue engineering scaffold constructed by integrating MoO 3− x subnanometric wires onto 3D printing bioactive glass scaffolds. The MoO 3− x subnanometric wires are synthesized by a one-pot hydrothermal method, which aggregate in an acidic tumor microenvironment and react with hydrogen peroxide to produce reactive oxygen species for specific chemodynamic therapy. However, they can degrade rapidly under physiological conditions without causing toxicity. Moreover, self-adaptively enhanced photothermal conversion enables tumor-targeting photothermal therapy while enhancing chemodynamic therapy. Additionally, the Mo 5+ -Mo 6+ transition enables lipid peroxide accumulation and glutathione depletion, thereby resulting in the deactivation of glutathione peroxidase 4 protein and ferroptosis through Western blot analysis, confocal laser scanning microscopy observation, and mRNA transcriptome analysis. In addition to its robustness against osteosarcoma, the constructed scaffolds can stimulate rat bone mesenchymal stem cell differentiation and proliferation as well as promote osteogenesis in bone defects. Therefore, this multifunctional scaffold not only validates the subnanomedicine concept but also provides a promising clinical strategy for bone tissue engineering.
研究领域:
生物医学工程
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材料科学
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癌症研究
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组织工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Ya-Ya Yang,Hao-Peng Feng,Xue-Gang Zhang,Hai Guo,Xiao-Ju Wen,Long Sui,Zheng-Tao Dong,Ming Yan,Cheng-Gang Niu
Water pollution caused by organic pollutants and water-borne pathogens has posed a serious threat to human health. Herein, a fully encapsulated core–shell MoO 3-x @Zn 2 In 2 S 5 S-scheme heterojunction was constructed for efficient removal of ciprofloxacin (CIP) and disinfection of antibiotic-resistant bacteria (TC- E. coli ). The excellent catalytic performance is attributed to the synergistic advantages of optimized oxygen defect concentration, the protection of oxygen vacancy and enhanced photogenerated carrier separation efficiency. The MO@ZIS-15 with optimum defect density can remove 92.6 % of CIP in 120 min and inactivate 7.7 log TC- E. coli in 75 min. Furthermore, the developed MO@ZIS-15 system has excellent anti-anion and organic matter interference ability, and also exhibit good utilization potentiality in practical water. Combining theoretical calculations and liquid chromatography-mass spectrometry (LC-MS), the structure–function correlation between different CIP active sites and degradation pathway are revealed. Toxicity prediction and cytotoxicity experiments demonstrated that photocatalytic treatment can effectively reduce the ecotoxicity of degradation products. This work provideds a novel vision to design high-efficiency plasma-based photocatalysts for the removal of organic contaminants and disinfection of antibiotic-resistant bacteria.
研究领域:
环境科学
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材料科学
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生物医学工程
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产品关联
DOI
高影响因子
Nano Energy
·
2014
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IF 10.211
Xu Xiao,Zehua Peng,Chi Chen,Chuanfang Zhang,Majid Beidaghi,Zhenhua Yang,Nan Wu,Yunhui Huang,Ling Miao,Yury Gogotsi,Jun Zhou
Molybdenum trioxide (MoO 3 ) is known as a promising pseudocapacitive material, but low conductivity limits its applications. Hydrogenation is demonstrated to increase the conductivity of MoO 3 and hence improve its electrochemical performance. Hydrogenated MoO 3 (MoO 3− x ) shows enhanced conductivity based on, both first principle calculations and single nanobelt measurements. Freestanding MoO 3− x /carbon nanotubes (CNT) composite films have been fabricated and showed much improved electrochemical performance compared to composites of CNT and as-synthesized MoO 3 (MoO 3 /CNT). Electrodes showed a specific capacitance of 337 F/g (based on the mass of MoO 3− x ) and a high volumetric capacitance of 291 F/cm 3 (based on the whole electrode) with excellent rate capability. Also we confirmed that the improved intercalation kinetics and the increased intercalation pseudocapacitance could be attributed to the higher electronic conductivity of MoO 3− x , which results in better and faster intercalations of Li + ions. This electrochemical behavior implies that MoO 3− x can serve as a very good negative electrode with high capacitance at high mass loading levels.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Xingyu Li,Dongxu Wang,Shixuan Xia,Qin Zhang,Ruiting Li,Li Fang,Yingjie Jiang,Jiancong Liu,Chungui Tian
A solvent-induced facet engineering to construct an O V -rich plasmonic MoO 3-x . • Abundant Mo 5+ /O V induce strong LSPR, driving efficient photothermal conversion. • O V sites enhance reactant adsorption and trap electrons to drive H 2 O 2 activation. • Light-driven photothermal catalysis enables 99.15% DBT conversion in just 10 min. • Natural sunlight delivers 99.56% conversion within 12 min. Increasingly stringent global environmental regulations make ultra-low-sulfur fuel production urgent, but the energy-intensive nature of conventional oxidative desulfurization requires alternative technologies under mild and sustainable conditions. Herein, we report a solvent-induced facet engineering strategy to construct a plasmonic MoO 3-x catalyst enriched with oxygen vacancy (O V ), which enables efficient solar-driven photothermal oxidative desulfurization (ODS) without external heating. By leveraging the reductive nature and facet growth modulation of methanol, a flower-like MoO 3-x assembled with nanosheet predominantly exposing the (021) facet is synthesized, promoting abundant Mo 5 + /O V active sites. O V serves a dual role: it endows strong localized surface plasmon resonance (LSPR) for efficient light harvesting and localized heating, while functioning as active centers for reactant adsorption/activation and as electron traps to facilitate H 2 O 2 decomposition into •OH radicals. Under light excitation, the optimized catalyst achieves efficient light-driven heating (70 °C) and delivers 99.15% dibenzothiophene (DBT) conversion within 10 min, with a rate constant 73.8 times higher than that of conventional MoO 3 . This excellent performance is also achieved under natural sunlight (99.56% conversion within 12 min), demonstrating its practical feasibility. This work establishes a defect-engineering paradigm for plasmonic catalysts toward solar energy utilization in sustainable fuel purification. Download: Download high-res image (283KB) Download: Download full-size image A solvent-induced facet engineering strategy was employed to synthesize a plasmonic MoO 3-x nanosheets with predominantly exposed (021) facets, generating abundant Mo 5+ /O V active sites. O V serves a dual role: inducing strong LSPR for light harvesting and localized heating, while functioning as active centers for reactant adsorption/activation and electron traps to facilitate H 2 O 2 decomposition into •OH radicals. Under light excitation, the catalyst achieves 99.15% DBT conversion within 10 min (rate constant 73.8 times higher than MoO 3 ). This excellent performance is also achieved under natural sunlight (99.56% conversion within 12 min), demonstrating its practical feasibility.
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DOI
高影响因子
OPTICS COMMUNICATIONS
·
2024
·
IF 2.2
Hongwen Cao,Lei Sun,Sen Sun,Zhijun Wang,Xin Xie,Tongtong Zhu,Rui Zhong,Yihan Wang,Kun Zhang
Molybdenum oxides (MoO 3-X ) with the same surface plasmon resonance (SPR) effect as Au/Ag, and occupies an irreplaceable value in SERS detections. MoO 3-X SERS substrates with oxygen-rich defects tend to show better SERS performance, but the preparation and characterization of tunable O defects remain challenging. It cannot be ignored that the oxidation state of metal cations is also influenced by O defects. Here, a series of MoO 3-X SERS sensors with regulable Mo valence state were fabricated using magnetron sputtering technology. By changing the Mo sputtering power and the O 2 /Ar 2 ratio, the Mo/O element ratio of the substrate can be easily regulated to readjust the O defects. The X-ray Photoelectron Spectroscopy (XPS) and Raman spectra were performed to investigate the change and related relationship between Mo mixed valence state and SERS sensitivity. The abundant incompletely coordinated electrons produced by low valence Mo Ⅳ act as free carriers, increasing the free carrier density of MoO 3-X substrates, which is beneficial for the SERS effect. It has also been proven by Hall effect measurement. The SERS measurement shows that the enhancement factor (EF) reached 3.70 × 10 5 , which is exceedingly close to Au/Ag. The MoO 2.5 substrate also exhibited a repeatable and consistent response, high stability, and repeatability, which proves the splendid application potential in complex environments.
研究领域:
材料科学
·
光谱学
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产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 31
·期 5
·055502
·
IF 3.399
Leilei Lan,Xiangyu Hou,Yimeng Gao,Xingce Fan,Teng Qiu
As a powerful analytical tool of molecular detection, surface-enhanced Raman spectroscopy (SERS) has attracted great attention in varied fields. However, it has seriously impeded the development of SERS that the preparation process is generally complicated and traditional substrates lack eco-friendliness, economy and flexibility. Herein, we fabricated the inkjet-printed paper-based semiconducting SERS substrates for the first time via an inexpensive office inkjet printer with representative two-dimensional MoO3−x nanosheets ink. Compared with conventional substrates, these paper-based semiconducting substrates not only could meet the requirements of simple and large-scale preparation, but also realize efficient sample collection by merely swabbing the surface. We obtained the detection limit concentration of rhodamine 6G as low as 10–7 M. Furthermore, these flexible paper-based substrates were successfully applied to detect crystal violet and malachite green on the fish surface by swabbing. With immense potentiality in practical applications, the inkjet-printed paper-based semiconducting SERS substrates are expected to open a new prospect for SERS.
研究领域:
分析化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2023
·Vol. 13
·期 5
·1325-1334
·
IF 5
Fengyun Su,Zhishuai Wang,Hailong Cao,Haiquan Xie,Wenguang Tu,Yonghao Xiao,Shukui Shi,Jiaqi Chen,Xiaoli Jin,Xin Ying Kong
Developing inexpensive co-catalysts for photo-thermal synergistic catalysis by artificially inducing active sites on non-noble metal compounds has drawn much attention recently. In this work, oxygen-deficient molybdenum oxide (MoO3−x) was in situ photodeposited on the surface of graphite-like carbon nitride (g-C3N4) to tremendously improve its photocatalytic activity for CO2 conversion. A series of characterization analyses divulged that the MoO3−x not only promoted the separation of photo-generated charge carriers, but also served as the active sites for the adsorption and activation of CO2 molecules. More importantly, the oxygen-vacancy defect sites of MoO3−x can trigger localized surface plasmon resonance (LSPR) that enables effective harnessing of near-infrared (NIR) photons, promoting photo-thermal synergistic catalytic conversion of CO2 into value-added fuels through full solar spectrum harnessing.
研究领域:
材料科学
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环境科学
·
化学工程
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DOI
高影响因子
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