DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 41
·15797-15805
·
IF 4.569
Jiawei Wu,Bangfu Ding,Xin Qian,Liang Mao,Huibin Zheng,Lei Zhang,Shukai Zheng,Junying Zhang
The Bi2MoO6 nanosheets are loaded on to γ-Bi2O3 tetrahedron surfaces to form Bi2MoO6/γ-Bi2O3 heterojunctions using a simple calcination method. The photocatalytic degradation efficiencies of the lomefloxacin and the Rhodamine B using the optimum sample are 96% and 99%, respectively, much higher than that of pure phase samples. When the waters from different regions in China were used as solvents, the removal efficiencies of the lomefloxacin and the Rhodamine B are still higher than 88% and 90%, respectively, which shows excellent prospects for practical applications. The photocatalytic degradation efficiencies of these two pollutants are higher than 91% and 95% in the five cycling tests, and the crystal structure of the sample is not changed after cycling. Based on the first-principles calculation, Bi2MoO6 and γ-Bi2O3 form a Z-type energy band structure which accelerates the separation of the photogenerated charge carriers. The Bi2MoO6 valence band potential of 3.25 V and the γ-Bi2O3 conduction band potential of −0.21 V are reserved to generate ˙OH− and O2−, respectively, for the photocatalytic reaction. The degradation of the lomefloxacin is ascribed to the shedding of functional groups and bond breaking with the final products being CO2, F−, H2O, and NO3−. This research shows that Bi2MoO6/γ-Bi2O3 heterojunctions can be employed to purify domestic and textile industrial sewage.
研究领域:
环境科学
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材料科学
·
化学
·
水处理
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产品关联
DOI
PubMed
高影响因子
Small
·
2021
·Vol. 18
·期 3
·2104244
·
IF 13.281
Jie Wu,Fakun Wang,Haobo Li,Sijie Yang,Pengyu Li,Yinghe Zhao,Yuan Li,Tianyou Zhai
Ultraviolet detection is of great significance due to its wide applications in the missile tracking, flame detecting, pollution monitoring, and so on. The nonlayered semiconductor γ-Bi 2 O 3 is a promising candidate toward high-performance UV detection due to the wide bandgap, excellent light sensitivity, environmental stability, nontoxic and elemental abundance properties. However, controllable preparation of ultrathin 2D γ-Bi 2 O 3 flakes remains a challenge, owing to its nonlayered structure, metastable nature, and other competing phases. Moreover, the UV photodetectors based on 2D γ-Bi 2 O 3 flake have not been implemented yet. Here, ultrathin (down to 4.8 nm) 2D γ-Bi 2 O 3 flakes with high crystal quality are obtained via a van der Waals epitaxy method. The as-synthesized single-crystalline γ-Bi 2 O 3 flakes show a body-centered cubic structure and grown along (111) lattice plane as revealed by experimental observations. More importantly, photodetectors based on the as-synthesized 2D γ-Bi 2 O 3 flakes exhibit promising UV detection ability, including a responsivity of 64.5 A W −1 , a detectivity of 1.3 × 10 13 Jones, and an ultrafast response speed (τ rise ≈ 290 µs and τ decay ≈ 870 µs) at 365 nm, suggesting its great potential for various optoelectronic applications.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
半导体物理
·
薄膜生长
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2026
·
IF 5.9
Wanchun Lin,Yingchun Liu,Jiayuan Yang,Bo-Mei Liu,Wei Liu,Maoping Lyu,Jesse Zhu,Hui Zhang
Recent public health issues and the rise of antimicrobial resistance have driven the demand for durable, self-activating antimicrobial surfaces. Traditional metal oxide coatings often suffer from uncontrolled ion release and limited antibacterial mechanisms, which hinder their long-term effectiveness. In this work, a mechanically robust, friction-activated hydrophobic antibacterial coating is developed by integrating γ-Bi 2 O 3 , polydimethylsiloxane (PDMS), and nanoscale hydrophobic SiO 2 . PDMS imparts low surface energy, while SiO 2 reinforces mechanical stability; substrate adhesion is further enhanced via plasma treatment followed by KH570 silane grafting. Microscale tetrahedral γ-Bi 2 O 3 (∼6 μm) with nanoscale tips (∼200 nm) enables a synergistic antibacterial effect through controlled Bi + release and mechanical membrane disruption, while maintaining low cytotoxicity. Upon friction activation, the P 1 B 2 S 0.04 coating exhibited an increase in water contact angle from 113.1 ± 1.7 ° to 145.9 ± 3.7 ° after 1000 abrasion cycles. The antibacterial rates against E. coli reached 99.94 %, 99.67 %, and 99.87 %, and S. aureus values were 97.77 %, 99.08 %, and 99.29 % after 300, 600, and 900 cycles, respectively. Cytotoxicity tests confirmed good biocompatibility, with cell viability exceeding 80 %. These results indicate that the coating maintains sustained antibacterial performance after repeated abrasion, showing strong potential for applications on medical and public surfaces.
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DOI
PubMed
高影响因子
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