JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2019
·
IF 3.261
Hong Yan,Zengwei Zhu,Yumei Long,Weifeng Li
Graphitic carbon nitride (g-C 3 N 4 ) with desired microstructure and chemical functionalities has been drawing considerable interests in terms of their potential applications for environmental treatment and clean energy production. Herein, a novel structure of MoO 3-x ―intercalated g-C 3 N 4 (Mo-g-C 3 N 4 ) and the synthesis strategy were demonstrated by using melamine molybdate as a precursor. The single-source precursor of melamine molybdate ensured the homogeneous mixing between MoO 3-x and g-C 3 N 4 at molecular level. Meanwhile, the strongly chemical interaction between melamine and molybdate promoted the in-situ intercalation of MoO 3-x into g-C 3 N 4 interlayer. The intercalation of MoO 3-x not only improved the visible-light absorption ability, but also facilitated charge separation through interlayer pathway for g-C 3 N 4 . As expected, the Mo-g-C 3 N 4 possesses enhanced activity in the photo-degradation of methyl orange and photo-destruction of Escherichia coli ( E. coli ) bacteria illuminated by visible light. The radicals trap experiments revealed that the holes (h + ) are dominant species in the photocatalysis process over Mo-g-C 3 N 4 . Accordingly, a possible photocatalysis mechanism of pollutants over Mo-g-C 3 N 4 was developed. This study opens up a new way for optimizing microstructure of g-C 3 N 4 -based materials with favorable photocatalytic properties.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Dongfeng Hong,Kejing Zhang,Mingshuo Yang,Ruijing Yang,Yusheng Xu,Qiudong Duan,Dacheng Zhou,Yongjin Li,Zhengwen Yang,Zhiguo Song,Yong Yang,Qi Wang,Jianbei Qiu
Photocatalytic conversion of CO 2 into valuable fuels is considered a promising approach for the development of sustainable and renewable energy sources. In this study, we utilized Mo-MOF as a precursor to obtain MoO 3 by pyrolytic derivatization and treated it to obtain MOF-MoO 3-x containing oxygen vacancies as a catalyst for the photocatalytic reduction of CO 2 to CO. MOF derivatization altered the morphology of the MoO 3 , which made the formation of oxygen vacancies easier and facilitated the separation of electron-hole pairs. Meanwhile, the increased specific surface area and the appearance of surface oxygen vacancies enhanced the CO 2 adsorption and activation capabilities of MOF-MoO 3-x . As a result, MOF-MoO 3-x demonstrated a significant enhances in the photoreduction activity of CO 2 . Its CO yield was 29.1 μmolg −1 h −1 , which was 3.7 times higher than that of MOF-MoO 3 and 2.4 times higher than that of H-MoO 3-x . This innovative strategy may provide a new avenue for improving the comprehensive performance of photocatalysts and developing renewable energy sources.
研究领域:
材料科学
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能源化学
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环境科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Nijuan Liu,Hongping Zhang,Fupeng Jin,Hao Liang,Duoqiang Wang,Yuanzhuo Li,Ruijuan Wang,Wei Tian,Ruibin Guo,Zunli Mo
Photocatalytic technology plays a critical role in uranium extraction by converting soluble U(VI) into insoluble U(IV), underscoring the need to develop efficient catalysts for the photoreduction of U(VI) in aqueous environments. To address this challenge, researchers have developed core–shell MoO 3-X @ZnIn 2 S 4 (M@ZISn) photocatalysts, co-regulated through homometallic ion doping and heterojunction engineering, for U(VI) extraction. The M@ZIS 0.5 photocatalyst demonstrated outstanding performance, achieving a removal rate of 98.84 % and a removal capacity of 296.52 mg·g −1 within 90 min. Optical characterization revealed that its superior photocatalytic activity stems from three key factors: (1) Mo 5+ doping and heterojunction formation effectively suppressed the recombination of photogenerated electron-hole pairs, (2) the core–shell structure provided an efficient pathway for the transfer of photogenerated carriers, and (3) Density Functional Theory (DFT) calculations confirmed that homometallic ion doping and heterojunction engineering optimized the semiconductor’s bandgap structure and enhanced its performance. Notably, when applied to spiked natural water samples (from the Yellow River, Salt Lake, and seawater), the M@ZIS 0.5 catalyst maintained a high removal rate of 78.82 %, demonstrating its potential for practical applications in real-world water systems.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
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IF 19.503
Xiufan Liu,Yani Luo,Cancan Ling,Yanbiao Shi,Guangming Zhan,Hao Li,Huayu Gu,Kai Wei,Furong Guo,Zhihui Ai,Lizhi Zhang
Herein, we demonstrate that the rare-earth La single catalyst with multi-shell characteristic is an excellent choice for this purpose. By merit of its unsaturated orbitals of La, the single La atom strongly bonds with the two-coordinated lattice oxygen on the oxygen-deficient MoO 3−x to form O 2c -La-O 2c coordination. This robust metal-support interaction frees single atoms from detachment or aggregation, and prevents catalyst from deactivation. Meanwhile, the occupied 5d orbitals of La back-donate electrons to the 2π* molecular orbitals of adsorbed N 2 that substantially activate the inert N N bond towards successive hydrogenation. And single La atom could optimize the electron property of the MoO 3−x support to promote photocatalytic nitrogen fixation. Without any sacrificial agents, this single atom La catalyst with a well-designed coordination structure delivers an impressive NH 3 production rate of 209.0 μmol h 1 g 1 under visible light, outperforming most reported single atom photocatalysts.
研究领域:
材料科学
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催化化学
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环境科学
✓ 已验证
DOI
高影响因子
CARBON
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2022
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IF 11.307
Shaojun Wu,Hongliang Hou,Xiang Xue
Microwave absorption materials can effectively eliminate harmful electromagnetic radiation to protect humanity, but it still remains challenging to attain absorbers with quad-band compatible strong absorption to date. Herein, MoO 3-x @MWCNT with tunable morphologies was fabricated via a facile one-step hydrothermal route and their microwave absorption properties in different frequency bands were systematically investigated, along with the multifunctional properties. The absorbers with a hollow hexagonal prism and cauliflower-like morphologies can be tailored by changing the hybrid ratios of MoO 3-x rich in vacancy defects and defective MWCNT from 5:1 (S1), 6:1 (S2) to 7:1 (S3), contributing to quad-band absorption (S-, C-, X- and Ku-bands) with maximum effective absorption bandwidth of 3.68 GHz for S2 and tri-band absorption (S-, X- and Ku-bands) with maximum effective absorption bandwidth of 4.67 GHz for S3, and optimal reflection loss can reach −62.23 dB when a compound ratio of 30% is satisfied in S3/paraffin. The conspicuous quad-band absorption and reflection loss are manipulated by the synergetic effects of multiple factors including porous structures , numerous defects and heterogeneous interfaces, etc. Additionally, remarkable fire-retardancy, photothermal de-icing and antibacterial performance of synthesized MoO 3-x @MWCNT-based absorbing coating are expected to deliver solutions for complex communication and detection in the military and civil fields.
研究领域:
材料科学
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电磁学
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功能材料
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产品关联
DOI
高影响因子
Optical Materials Express
·
2019
·Vol. 9
·期 11
·4429-4437
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IF 2.673
Meng Wang,Meng Wang,Shaolong Huang,Yu-Jia Zeng,Jingwei Yang,Jihong Pei,Shuangchen Ruan,Shuangchen Ruan
We reported on a passively Q-switched double-clad thulium-doped fiber laser by using oxygen vacancies (OVs) enriched with MoO3-x as a saturable absorber (SA). The MoO3-x was successfully embedded in polyvinyl alcohol and acted as the SA for a stable Q-switching operation in the 2 µm wavelength region. Stable Q-switched pulses were obtained at a central wavelength of ∼1992.1 nm with a maximum output power of ∼62.7 mW, maximum pulse energy of ∼1.63 µJ and a minimum pulse duration of ∼2 µs. The repetition rate of the pulses can be tuned from ∼15.5 kHz to ∼38.5 kHz with increasing the pump power. Our experiment was the first demonstrated use of MoO3-x as a SA for pulse laser generation, in which OVs were considered as the original reason for the optical saturable absorption. Moreover, it provides a novel idea for optical SA preparation by controlling the vacancy defects in such materials.
研究领域:
光学
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材料科学
✓ 已验证
DOI
高影响因子
Nanomedicine-Nanotechnology Biology and Medicine
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2024
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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
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感染控制
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2022
·Vol. 57
·期 4
·2597-2609
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IF 4.682
Zhai Wangyi,Cao Yuanming,Li Yifei,Zheng Min,Wang Zuoshan
The exploration of novel and multifunctional coatings through composite nanomaterials design is crucial for developing next-generation polyester fabrics. Herein, we report an efficient approach of self-assembling MoO 3– x QDs on MXene (Ti 3 C 2 T x ) to fabricate multifunctional polyester fabrics. In a typical preparation, MoO 3– x QDs with an average size of 5 nm were uniformly distributed on the surface of MXene nanoflakes upon UV light. Then, polyester fabrics were coated with MoO 3– x QDs/MXene by dipping. The results demonstrated that the coated fabric had a decreasing trend in the electrostatic half-period from more than 60 s (untreated fabric) to 0.15 s and had excellent washing fastness. In addition, a similar phenomenon was found in smoke suppression, with the coated fabric producing 36.16% less smoke. More importantly, the sterilization rate of the coated fabric had reached 99% to E. coli and S. aureus under sunlight owing to the strong response of MoO 3– x QDs/MXene. This work provides a novel and facile strategy to design multifunctional coatings.
研究领域:
材料科学
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纺织工程
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纳米技术
✓ 已验证
DOI
高影响因子
Canadian Journal of Chemistry
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2021
·Vol. 99
·期 10
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IF 1.118
Xiaoxia Li,Shuaida Zhu,Qi Jia,Haixia Zhao,Yuqi Cao,Yuying Ma,Shuangqi Hu,Xiong Cao
In this work, it is shown that MoO3-x has a positive effect on the thermal decomposition of ammonium perchlorate based molecular perovskite (H2DABCO)[NH4(ClO4)3] (DAP-4). MoO3-x was prepared by heat treatment, and the morphology, structure, and thermal decomposition performance were characterized. The morphology and structure characterization results showed that MoO3-x was an irregular layered structure material and the Mo element was mainly in the +6 chemical valence state, with a small amount of Mo5+. Thermal analysis results showed that the thermal decomposition peak temperature of DAP-4 was effectively reduced from 394.4 °C to 353.7 °C, 321.4 °C, and 312.5 °C in the presence of 1%, 5%, and 10% MoO3-x, respectively. It is particularly worth noting that the maximum heat release rate of the DAP-4/10% MoO3-x mixture was increased by 4.9 times compared with pure DAP-4. Through the two classic thermal decomposition kinetic methods, Kissinger and Starink, the reliable kinetic parameters of DAP-4/MoO3-x were obtained. The increase of the reaction rate constant k indicated that the maximum thermal decomposition reaction rate of DAP-4 was effectively improved. This work provided a feasible technology for using MoO3-x as an effective catalyst to improve the thermal performance of DAP-4.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 8
·2262-2271
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IF 4
Pengzuo Chen,Kaixun Li,Yutong Ye,Doufeng Wu,Yun Tong
Developing high-performance and low-cost self-supporting electrodes as pH-universal electrocatalysts for the hydrogen-evolution reaction (HER) and realizing high-quality hydrogen production at a high current density are highly desirable, but are hugely challenging. We created a self-supporting electrode with a coupled hierarchical heterostructure by simple electrodeposition followed by sulfurization. It comprised oxygen-deficient molybdenum oxide (MoO3−x) and cobalt phosphide (CoP) on nickel foam (NF), which represented a highly active pH-universal electrocatalyst for the HER at a high current density. Benefiting from a plethora of catalytic active sites, improved interfacial charge transfer, and strong electronic interaction, this type of MoO3−x@CoP/NF electrode delivered a superior catalytic performance. Overpotentials of only 100 mV, 135 mV, and 400 mV were needed to realize a high current density of 1 A cm−2 in alkaline, acid and neutral media, respectively, which were superior to those of most other well-developed materials based on non-noble metals. Our experimental work demonstrates the synergistic advantages of a MoO3−x@CoP heterostructure for improving the intrinsic catalytic performance but also paves a new path for the rational design of advanced electrodes for hydrogen generation in a wide range of pH conditions.
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 Materials Chemistry A
·
2016
·Vol. 4
·期 38
·14560-14566
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IF 8.262
Qian-Long Lu,Shi-Xi Zhao,Chang-Ke Chen,Xia Wang,Yu-Feng Deng,Ce-Wen Nan
Pseudocapacitance is induced by surface or near surface redox, ion intercalation or underpotential deposition processes. A given electrochemically active material usually has only one of the above mechanisms. In this study, we synthesized elm seed-like mesoporous MoO3−x nanosheets, which possess both redox and intercalation faradic mechanisms. This novel pseudocapacitance mechanism causes a high capacitance of 1480 F g−1 at 5 A g−1 and outstanding cycling performance where the capacitance does not decay but increases slightly up to 10 000 cycles at a scan rate of 100 mV s−1. Here, we clarified that the tunnel structure of MoO3−x and its special electrochemical kinetics towards H+ generate this mechanism. This faradic mechanism could achieve a higher degree of utilization of the active-sites thus resulting in excellent electrochemical performance.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2021
·
IF 17.881
Pengfei Yan,Liang Ji,Xiaopeng Liu,Qinghua Guan,Junling Guo,Yonglong Shen,Haijun Zhang,Weifeng Wei,Xinwei Cui,Qun Xu
2D heterostructures offer a great opportunity in seeking high-performing energy storage materials ; however, performance ceiling exists, limited by their van-der-Waals (vdW) interactions. Here, we explore a novel 2D, amorphous MoO 3−x (aMoO 3−x ) on Ti 3 C 2 -MXene, non-vdW heterostructure via a facile synthesis route. Density functional theory computations suggest that the non-vdW heterostructure can strongly stabilize aMoO 3−x while maintaining electrical conductivity at a high level. Facile 2D Li-ion diffusion can then be achieved in the restacked 2D non-vdW heterostructures due to the weakened interactions between two defective MoO 3−x layers, leading to a capacitor-like interlayer diffusion reaching a large capacity of 426 C g −1 on the surface of the amorphous layer and a diffusion-controlled intralayer diffusion of 546 C g −1 within the amorphous layer. These characteristics optimize Li-ion storage kinetics while achieving full capacities of amorphous materials with high stability. This work might offer a feasible platform of 2D non-vdW heterostructures for boosting and understanding Li-ion storage performance.
研究领域:
材料科学
·
能源科学
·
计算化学
✓ 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）