MOLECULES
·
2024
·Vol. 29
·期 7
·1486
·
IF 4.2
Zhaokang Zheng,Zhen Liu,Xingying Li,Aiwu Wang
Due to the depletion of the global ozone layer and the presence of ozone holes, humans are increasingly exposed to threats from solar ultraviolet radiation. Therefore, researching and developing a highly selective, sensitive, simple, and fast ultraviolet sensor is of significant importance for personal protection. In recent years, new nanomaterials have shown good application prospects in the research of ultraviolet sensors. MoOx nanostructures were prepared by a hydrothermal method. The experimental results show that, compared to traditional photochromic compounds, the new MoOx nanostructures exhibit high uniqueness, high selectivity, and excellent stability, and can perform rapid and accurate detection under full-band light. The beam sensor can not only detect through traditional electrical signal output, but also amplify, display, and analyze the beam through visualization and visual analysis, further improving the reliability and practicality of its application.
研究领域:
材料科学
·
光学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Bio Materials
·
2019
·
IF 0
Yu Li,Jianrong Wu,Gareth R. Williams,Shiwei Niu,Jianfeng Zhou,Yanbo Yang,Xuejing Zhang,Zi Fu,Dejian Li,Li-Min Zhu
Two-dimensional (2D) nanomaterials able to effectively absorb near-infrared (NIR) radiation have shown considerable potential as multifunctional platforms in the treatment of cancer. Here, we report a molybdenum dioxide (MoOx)-based system for synergistic chemo- and photothermal therapy of cancer. MoOx nanosheets were generated via a one-step hydrothermal route, grafted with poly(ethylene glycol) (PEG), and decorated with melanin (Mel), with successful functionalization confirmed by IR spectroscopy. The mean diameter and thickness of the MoOx particles were found to be 302 ± 34 nm and 19 ± 2 nm using atomic force microscopy. The hydrodynamic size of the MoOx nanosheets was 105 ± 17 nm, and the resulting final MoOx-PEG-Mel-DOX nanocomposite formulation had a uniform diameter of 161 ± 26 nm. The MoOx-PEG-Mel nanosheets efficiently convert NIR light to heat, possessing a photothermal conversion efficiency of 61.7%. They can also be loaded with doxorubicin hydrochloride (DOX), giving a high drug loading (325.6 mg DOX/g MoOx-PEG-Mel). DOX release from the formulation is influenced by both pH and NIR irradiation. Systematic in vitro and in vivo evaluations reveal that synergistic chemo- and photothermal therapy using MoOx-PEG-Mel-DOX can completely eradicate a tumor with no observable off-target cytotoxicity. This is the first report of the fabrication of enhanced photothermal agents by combining MoOx nanosheets and a natural product. This work proffers a strategy for efficiently treating cancer as well as potentially extending the photothermal applications of 2D nanomaterials by surface melanin functionalization.
研究领域:
生物医学工程
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纳米医学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
Nanomaterials
·
2021
·Vol. 11
·期 12
·3192
·
IF 5.076
Hao Xu,Liangjing Zhang,Aiwu Wang,Juan Hou,Xuhong Guo
Photochromic materials have attracted increasing attention. Here, we report a novel photo-reversible color switching system based on oxygen-vacancy-engineered MoOxnanostructures with water/N-methyl-2-pyrrolidone (NMP) as solvents. In this work, the system rapidly changed from colorless to blue under UV irradiation (360–400 nm) and slowly recovered its colorless state under visible light irradiation. The obtained oxygen vacancy-engineered MoOxnanostructures exhibited good repeatability, chemical stability, and cycling stability. Upon UV light irradiation, H+was intercalated into layered MoOxnanostructures and the Mo6+concentration in the HxMoOxdecreased, while the Mo5+concentration increased and increased oxygen vacancies changed the color to blue. Then, it recovered its original color slowly without UV light irradiation. What is more, the system was highly sensitive to UV light even on cloudy days. Compared with other reported photochromic materials, the system in this study has the advantage of facile preparation and provides new insights for the development of photochromic materials without dyes.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Xiaoqing Bin,Yapeng Tian,Yangyang Luo,Minhao Sheng,Yijia Luo,Maomao Ju,Wenxiu Que
In order to obtain high-performance flexible electrodes for supercapacitors, the nitrogen-doped delaminated-Ti 3 C 2 T x (N-d-Ti 3 C 2 T x ) decorated with MoO x nanoparticles (N-d-Ti 3 C 2 T x /MoO x ) films are prepared by a one-step solvothermal method. The N-d-Ti 3 C 2 T x nanosheets with high conductivity can facilitate electron transfer during the charge and discharge process, and the MoO x nanoparticles can contribute to high pseudocapacitance. Hence, their combination is expected to not only inhibit N-d-Ti 3 C 2 T x nanosheets from re-stacking, but also enhance the specific capacity of the whole electrode. Here, benefiting from the synergistic effect of the two components, the obtained optimal flexible and free-standing N-d-Ti 3 C 2 T x /MoO x film electrode delivers an ultrahigh capacity of 341.0 C g −1 (920.6 C cm −3 , 487.1 F g −1 , 1315.2 F cm −3 ) at the scan rate of 2 mV s −1 , and shows superior capacity retention of 99.2% after 11000 cycles at the current density of 5 A g −1 . Moreover, the flexible and free-standing N-d-Ti 3 C 2 T x /MoO x film electrode is also beneficial to promote the development of flexible supercapacitors.
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
RENEWABLE ENERGY
·
2019
·
IF 5.439
Qilu Yao,Kangkang Yang,Wendan Nie,Yaxing Li,Zhang-Hui Lu
Hydrazine borane (N 2 H 4 BH 3 ) has been considered as a promising chemical hydrogen storage material in recent years for its high hydrogen content (15.4 wt%), easy preparing, and good stability. Designing highly efficient and selective catalysts for realizing the hydrogen evolution from N 2 H 4 BH 3 is highly attractive but still remains challenging. In this work, NiPd nanoparticles (NPs) modified with MoO x have been readily synthesized via a co-reduction route at room temperature and served as highly efficient catalysts toward hydrogen generation from N 2 H 4 BH 3 in aqueous solution. Compared to the pure Ni 0.6 Pd 0.4 NPs, the obtained Ni 0.6 Pd 0.4 -MoO x catalyst exhibits much higher catalytic performances in dehydrogenation of N 2 H 4 BH 3 at 323 K, providing a total turnover frequency (TOF) value of 405 h −1 and almost 100% hydrogen selectivity. The improved catalytic activity of NiPd-MoO x catalyst may be attributed to the small particles size and increased electron density of NiPd as well as the strong basic sites of NiPd NPs induced by the MoO x dopant . The facile synthesis of high-performance and cost-effective of metal NPs catalysts is of great significance for the development of N 2 H 4 BH 3 as a promising hydrogen storage material.
研究领域:
材料科学
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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
Small
·
2023
·Vol. 19
·期 10
·2206698
·
IF 13.3
Tongtong Liu,Hengyu Guo,Yanan Chen,Zhengping Zhang,Feng Wang
Pyrochlore ruthenate (Y 2 Ru 2 O 7–δ ) is highlighted as a promising oxygen evolution reaction (OER) catalyst for water splitting in polymer electrolyte membrane electrolyzers. However, an efficient electronic modulation strategy for Y 2 Ru 2 O 7–δ is required to overcome its electrochemical inertness. Herein, a surface manipulation strategy involving implanting MoO x moieties on nano Y 2 Ru 2 O 7–δ (Mo–YRO) using wet chemical peroxone method is demonstrated. In contrast to electronic structure regulation by intramolecular charge transfer (i.e., substitutional strategies), the heterogeneous Mo−O−Ru micro-interfaces facilitate efficient intermolecular electron transfer from [RuO 6 ] to MoO x . This eliminates the bandgap by inducing Ru 4 d delocalization and band alignment rearrangement. The MoO x modifiers also alleviate distortion of [RuO 6 ] by shortening Ru−O bond and enlarging Ru−O−Ru bond angle. This electronic and geometric structure tailoring enhances the OER performance, showing a small overpotential of 240 mV at 10 mA cm −2 . Moreover, the electron-accepting MoO x moieties provide more electronegative surfaces, which serve as a protective “fence” to inhibit the dissolution of metal ions, thereby stabilizing the electrochemical activity. This study offers fresh insights into the design of new-based pyrochlore electrocatalysts, and also highlights the versatility of surface engineering as a way of optimizing electronic structure and catalytic performance of other related materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 7
·1481
·
IF 4.6
Wenhui Zhou,Boxu Dong,Ziqi Si,Yushuai Xu,Xinhua He,Ziyi Zhan,Yaru Zhang,Chaoyu Song,Zhuoqian Lv,Jiantao Zai,Xuefeng Qian
Sulfur hexafluoride (SF6), the strongest greenhouse gas, has great challenges in degradation because of its stable structure, posing significant environmental concerns. Photocatalysis offers an environmentally friendly, low-energy solution, but the fluoride deposition on catalysts reduces their activity, thus limiting their large-scale application. To prevent catalyst fluoride poisoning, we report a thin-layer graphitic carbon nitride (CN) material loaded with MoOx(CNM) that resists fluoride deposition for long-term SF6degradation. By combining molecular structure design and nanostructure regulation, we construct a photocatalyst with enhanced charge carrier mobility and reduced transport distances. We find that the CNM exhibits a high specific surface area, increased contact between reactants and active sites, and efficient electron–hole separation due to the Mo-N bonds, achieving an SF6degradation efficiency of 1.73 mmol/g after one day due to the prolonged catalytic durability of the catalyst, which is eight times higher than pristine g-C3N4(0.21 mmol/g). We demonstrate the potential of CNMs for low-energy, high-efficiency SF6degradation, offering a new approach to mitigate the environmental impact of this potent greenhouse gas. We envision that this study will inspire further research into advanced photocatalytic materials for environmental remediation, contributing to global efforts in combating climate change.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Jiayi Li,Shiwei Wang,Zhihao Yu,Haojian Zhang,Lin Zhu,Chunzheng Wu,Hongbo Yu
The selective hydrogenation of halogenated nitroarenes into halogenated anilines poses a significant challenge due to the common issue of dehalogenation, which often results in low selectivity. In this research, we developed SiO2-supported Ir-MoOx nanostructures through the in situ transformation of IrMo/SiO2. The Ir-MoOx/SiO2 catalyst we produced, with an optimal Ir/Mo molar ratio of 1:1, achieved a 95.1% conversion rate for p-chloronitrobenzene (p-CNB) and a 97.4% selectivity for p-chloroaniline (p-CAN), significantly outperforming the standalone Ir/SiO2 catalyst. We explored how the MoOx promoter affects the electronic properties of Ir particles and examined the impact of Ir-MoOx interfaces on catalytic hydrogenation. This was done using advanced techniques, such as H2 temperature-programmed reduction (H2-TPR), H2 temperature-programmed desorption (H2-TPD), O2 temperature-programmed oxidation (O2-TPO), diffuse reflectance infrared Fourier transform spectroscopy, and kinetic analysis. The study revealed that the Ir-MoOx interface plays a crucial role in facilitating H2 dissociation and enhancing the adsorption of the reactants. Our Ir-MoOx/SiO2 catalyst showed excellent versatility across a wide range of substrates and maintained strong catalytic stability. This approach has the potential to be applied to other noble-metal-oxide systems for the efficient hydrogenation of halogenated nitroarenes.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 6
·1546-1552
·
IF 5.934
Qilu Yao,Meng He,Xiaoling Hong,Xiaoliang Zhang,Zhang-Hui Lu
Hydrogen has been considered as an important alternative energy source for both environmental and economic reasons. The development of highly efficient and selective catalysts for hydrogen evolution from chemical hydrogen storage materials (e.g. hydrous hydrazine, N2H4·H2O) has become one of the most active research areas. In this study, MoOx-doped NiPt nanoparticles (NPs) have been successfully prepared via a simple one-step co-reduction strategy at room temperature. The characterization results show that the surfactant/support-free NiPt–MoOx NPs with a mean particle size of 5.0 nm are well-dispersed and in a low-crystalline/amorphous state. It is found that the prepared NiPt–MoOx samples show much higher catalytic activity toward the decomposition of N2H4 as compared to that of NiPt without the introduction of MoOx. In addition, among all the NiPt–MoOx NPs, the optimized Ni0.6Pt0.4–MoOx nanocatalyst shows 100% H2 selectivity and the best catalytic performance for the decomposition of N2H4 under alkaline conditions at 323 K. The TOF value of Ni0.6Pt0.4–MoOx NPs is found to be 822 h−1, which is among the highest values ever report for the same reaction. The excellent catalytic activities could be attributed to the modified electronic structure and the small particle size of NiPt NPs induced by the MoOx dopant. Other MoOx-doped Ni-based (NiM, M = Rh, Ir, Au, Ag and Ru) bimetallic catalysts also showed excellent catalytic activity. The present highly efficient and selective catalyst system may encourage the practical application of N2H4·H2O as a potential chemical hydrogen storage material.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Qilu Yao,Meng He,Xiaoling Hong,Xinyu Chen,Gang Feng,Zhang-Hui Lu
Hydrazine borane (N 2 H 4 BH 3 , 15.4 wt%) and hydrous hydrazine (N 2 H 4 ·H 2 O, 8 wt%) are promising chemical hydrogen storage materials that have attracted much attention in recent years due to their high gravimetric hydrogen capacities. The selective and rapid catalytic dehydrogenation of N 2 H 4 BH 3 and N 2 H 4 ·H 2 O is the key to the potential use of the abovementioned materials in hydrogen applications. In this study, a series of Rh-MoO x nanoparticles (NPs) with various metal compositions have been successfully prepared via a simple one-step chemical reduction approach in the absence of a surfactant/support at room temperature . The obtained surfactant/support-free Rh-MoO x NPs exhibit good dispersibility and small particle size. Among all of the as-prepared Rh-MoO x NPs, the optimized Rh-MoO x catalysts with a molar ratio of 1:1 show the highest catalytic properties with 100% H 2 selectivity for hydrogen evolution from aqueous N 2 H 4 BH 3 and N 2 H 4 ·H 2 O solutions at 323 K under alkaline conditions. The turnover frequency (TOF) values of Rh 0.5 (MoO x ) 0.5 NPs are 2000 and 750 h −1 for hydrogen evolution from N 2 H 4 BH 3 and N 2 H 4 ·H 2 O , respectively, which are among the highest values ever reported for Rh-based catalysts. The superior catalytic performances could be attributed to the small particles size, low crystallinity , modified electronic structure, and strong basic sites of Rh NPs induced by the MoO x dopant . The highly rapid and selective Rh-MoO x catalyst may further encourage the deployment and application of N 2 H 4 BH 3 and N 2 H 4 ·H 2 O as safe and convenient sources of hydrogen for fuel cells.
研究领域:
化学工程
·
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Qianfeng Gao,Jianghao Liu,Zhiyuan Xu,Yu Yan,Wei Li,Taiqiang Wang,Hongyu Dun,Jiakai Zhou,Ke Tao,Baojie Yan,Bo Yu,JinChao Shi,Qian Huang,Xiaodan Zhang,Ying Zhao,Guofu Hou
Dopant-free crystalline silicon (c-Si) solar cells face critical challenges in hole transport layer (HTL) design, where conventional molybdenum oxide (MoO x ) contacts suffer from interface oxidation and insufficient electron blocking. While self-assembled monolayers (SAMs) demonstrate potential in organic photovoltaics, their application in silicon-based HTLs remains unexplored. In this study, a novel organic SAM (2PACz) is proposed, where phosphonic acid (PA) groups form strong coordination bonds with MoO x as HTL, aiming to improve cell performance via both chemical and field-effect passivation. The incorporation of 2PACz raises the work function of MoO x by 0.66 eV and significantly improves the minority carrier lifetime, which, in turn increases the built-in potential ( V bi ) to 1.06 V. These improvements contribute to a boost in both open-circuit voltage ( V oc ) and short-circuit current ( J sc ). Finally, the solar cell with 2PACz/MoO x -Au NPs-MoO x (MAM) stack achieves a V oc of 753.3 mV, a J sc of 40.10 mA cm − 2 , a fill factor ( FF ) of 79.12%, and a conversion efficiency ( E ff ) of 23.90%. The application of 2PACz in the HTL significantly enhances solar cell performance, offering a novel strategy for interface optimization in c-Si solar cells and other optoelectronic devices.
研究领域:
材料科学
·
光伏技术
·
半导体物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Amir Said,Binbin Qian,Ruiqian Zhang,Chunlei Yang,Ke Xu,Kunfeng Chen,Dongfeng Xue
The development of electrocatalysts with bifunctionality in acidic media is crucial for advancing proton exchange membrane water electrolyzers to produce clean hydrogen fuel. Herein, an efficient bifunctional RuO 2 /MoO x /CoNi-LDH nanocomposite was synthesized for the first time via a coprecipitation and two-step hydrothermal method and used as an electrocatalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), thereby contributing to efficient overall water splitting (OWS). When used as an electrocatalyst in 0.5 M H 2 SO 4 , the RuO 2 /MoO x /CoNi-LDH requires an overpotential of 185, 221, and 262 mV for OER and 33, 65, and 101 mV for HER to reach the current density of 20, 50, and 100 mA/cm 2 , respectively. The improved electrochemical performances of RuO 2 /MoO x /CoNi-LDH are well supported by a low charge transfer resistance, high electrochemical surface area, optimized nanocomposite structure, and the synergistic interaction among the RuO 2 NPs, MoO x nanosheet (NSs), and CoNi-LDH. Importantly, in acidic OWS, bifunctional RuO 2 /MoO x /CoNi-LDH exhibits excellent activities and merely requires a low voltage of 1.53 V to reach the current density of 20 mA/cm 2 , lower than most of the mixed-metal-based bifunctional electrocatalysts reported in acidic media. This study provides an efficient and cost-effective method for preparing high-performance mixed-metal nanocomposites for electrochemical water splitting in acidic environments and beyond.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）