JOURNAL OF MOLECULAR STRUCTURE
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2025
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IF 4.7
Jiayu Gu,Mingzhou Wu,Linlin Wang,Fengling Liu,Suhao He,Minrui Ding,Yuye Yao,Neng Tao,Haitao Sha,Zhaobing Guo,Huimin Zhou,Pin Zhou,Pengxiang Qiu
Photocatalyst modification by energy level engineering is crucial for efficient free radical generation. Here, a novel strategy was employed to construct bromine-doped Bi 2 MoO 6 (BMO-Br) followed by an in-situ approach using Cetyltrimethylammonium bromide (CTAB) as the bromine (Br) precursor. The Br doping effectively modulated the energy band, increasing the oxygen vacancy concentration in Bi 2 MoO 6 . The modification significantly enhanced photoinduced charge separation and active free radical generation, leading to superior photocatalytic performance. The photocatalytic bacteriostatic and sulfamethazine (SM) degradation efficiency over BMO-Br-4 reached 100% and 70% within 60 min and 150 min, respectively. This work highlighted a facile yet effective strategy for tailoring the photocatalyst properties, demonstrating promising potential for various photocatalytic applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Catalysis Science & Technology
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2023
·Vol. 13
·期 13
·3916-3926
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IF 5
Guangcheng Zou,Rui Cao,Conghui Cui,Yuqiang Luo,Chen Huang,Xinwei Cui,Zhiwen Wang,Yujie Song
Monolayer Bi2MoO6 nanosheets doped with F atoms (F-BMO-NSs) were developed as catalysts for the one-pot alkylation of nitrobenzene with benzyl alcohol. 95.88% conversion of nitrobenzene coupled with 99.98% selectivity of n-benzylideneaniline was achieved over the F0.04-BMO-NSs under visible light irradiation and 1 atm N2 at room temperature. XPS and EPR results suggested that F doping not only produced enhanced Lewis acid sites (Bi3+ and Mo6+), but also generated Lewis base sites (Mo5+). In situ FTIR spectra revealed that benzyl alcohol would be selectively adsorbed on the enhanced Lewis acid sites via Bi3+ (Mo6+)⋯OH–C– interface coordination, resulting in the activation of HO–C–. Moreover, nitrobenzene would be chemisorbed on the Mo5+ basic sites via Mo5+⋯NO2 coordination, inducing charge transfer from Mo5+ to –NO2. Under visible light irradiation, hydrogen transfer takes place from the chemisorbed benzyl alcohol to nitrobenzene generating benzaldehyde and aniline, finally coupling to form the imine. Based on these surface cooperated functional sites, a synergistic mechanism has been proposed to elucidate the accurate structure–performance relationship. This work provides a new perspective for the design of high activity, high selectivity and high stability photocatalysts for the precise synthesis of imines.
研究领域:
材料科学
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催化化学
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环境科学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Da Xu,Feng Sun,Hong Shao,Feng Liu,Qianli Ma,Wensheng Yu,Feng Li,Xiangting Dong
Metal oxide semiconductors (MOSs) are widely utilized in the gas-sensing field owing to their superior gas sensing performances. Herein, a hierarchical nanostructure consisting of Bi 2 MoO 6 nanosheets (NSs) assembled on LaFeO 3 nanofibers (NFs) was successfully synthesized by combining an electrospinning with a solvothermal method . The full study of the sensing performances was conducted by manufacturing commercial gas sensors based on Bi 2 MoO 6 /LaFeO 3 hierarchical nanostructure in order to showcase its potential application in gas sensing. The results show that the sensor based on Bi 2 MoO 6 /LaFeO 3 hierarchical nanostructure exhibits excellent HCHO gas sensing performances including a high response (R a /R g = 36.5), a superior selectivity and a short recovery time (τ rec = 20 s). Additionally, sensors based on Bi 2 MoO 6 NSs and LaFeO 3 NFs were also respectively fabricated to measure HCHO gas sensing performances in order to elucidate the sensing mechanism and structural superiority of the Bi 2 MoO 6 /LaFeO 3 hierarchical nanostructure. The increased capability of detecting HCHO gas can be attributed to the n-p heterostructure formed within the Bi 2 MoO 6 /LaFeO 3 hierarchical nanostructure. The findings in this work can contribute to the realization to enhance the sensing performances by designing n-p heterostructure in gas sensing material.
研究领域:
材料科学
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传感器技术
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纳米技术
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2019
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IF 8.456
Hao Wang,Yongqing Wang,Chunli Jiang,Kaihang Ye,Xiaohui He,Can Xue,Zujin Yang,Xiantai Zhou,Hongbing Ji
Herein, CuO/Bi2MoO6 hybrid nanosheets were prepared as a surface multifunctional photocatalyst for gas-phase toluene oxidation with high conversion (>99%). Aberration-corrected scanning transmission electron microscopy suggested that CuO species were highly dispersed on the nanosheets. X-ray absorption fine structure spectra indicated that the distorted and stretched Cu–O coordination structures in CuO/Bi2MoO6 nanosheets would provide open active sites. In situ Fourier transform infrared and density functional theory results showed that toluene molecules could be chemisorbed and activated on the active sites of CuO/Bi2MoO6 nanosheets by the C–H group forming CuO/Bi2MoO6···Ph-CH3 surface complex compounds. These would induce electron–hole transfer and initiate photocatalytic reactions under visible light irradiation. The corresponding intermediates of benzaldehyde and benzoic acid would be detected by in situ diffuse reflectance infrared Fourier transform spectroscopy. Furthermore, the synergistic effect of CuO and Bi2MoO6 nanosheets could monitor charge dynamics to facilitate their respective transmission from photoexcitation sites to active centers. This work provides new insights into the essence of visible-light-driven surface photocatalysis and is expected to promote the design of novel and more effective photocatalysts at the molecular level.
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
PubMed
高影响因子
ACS Applied Nano Materials
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2018
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IF 0
Yan Chen,Weiyi Yang,Shuang Gao,Caixia Sun,Qi Li
Controlled introduction of oxygen vacancies in metal oxide based photocatalysts could improve their charge carrier separation efficiencies to enhance their photocatalytic performances. In this work, oxygen vacancies were introduced in Bi2MoO6 nanosheets through a postsynthesis etching treatment by NaOH aqueous solution at room temperature for the first time, which removed the requirement of high temperature treatment, chemicals of high cost and environmental hazardness, or specific apparatus for the introduction of oxygen vacancies in previous studies. Furthermore, the crystal structure, morphology, optical properties, and energy band structures of these Bi2MoO6 nanosheets were not changed by this approach, which allowed the separation and illustration of the charge carrier separation role of oxygen vacancies for the photocatalytic performance enhancement. With the increase of oxygen vacancies, Bi2MoO6 nanosheets demonstrated improved electron–hole separation efficiency and largely enhanced photocatalytic activities as demonstrated by their effective sulfamethoxazole degradation and Escherichia coli bacteria disinfection under visible light illumination with good stability and reusability.
研究领域:
材料科学
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纳米技术
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环境科学
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光化学
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产品关联
DOI
JOURNAL OF CATALYSIS
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2016
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IF 7.354
Bao Zhang,Jun Li,Yuying Gao,Ruifeng Chong,Zhiliang Wang,Lin Guo,Xianwen Zhang,Can Li
Photocatalytic oxidation reactions provide a promising strategy for green synthesis of fine chemicals. However, the low photocatalytic efficiency and selectivity are the main obstacles. Herein, we report the ultrathin Bi 2 MoO 6 nanoplates with thickness of ∼17 nm which exhibit a superior performance in alcohol oxidation to corresponding aldehyde using O 2 under visible light irradiation, achieving ca. 29 times enhancement of activity compared with Bi 2 MoO 6 synthesized from traditional hydrothermal method (thickness of ∼250 nm). When Pt nanoparticles as cocatalyst are loaded on the surface of the ultrathin Bi 2 MoO 6 nanoplates, the photocatalytic performance is further enhanced. The remarkable enhancement of activity is attributed to the ultrathin 2D geometry of Bi 2 MoO 6 nanoplates, promoting the charge-separation efficiency and affording abundant catalytically active sites. The excellent selectivity of photocatalytic oxidation of benzyl alcohol on the ultrathin Bi 2 MoO 6 is attributed to the different adsorption behaviors of benzyl alcohol and benzaldehyde. This study could also provide an efficient strategy for improving the photocatalytic performance by rational fabrication of two-dimensional semiconductor materials for organic synthesis.
研究领域:
材料科学
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化学工程
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催化
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纳米技术
✓ 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）