Materials Today Communications
·
2025
·
IF 4.5
Song Yang,Jian-wei Wang,Xun-yong Yang,Ying-fei Yi,Zuo Li,Zu-hong Xiong,Li-hong Cheng,Xu Wang
BiFeO 3 -based ferroelectric thin films have attracted much attention for potential applications owing to their advantages of room-temperature multiferroic properties, controllable preparation process, and high remanent polarization. In this work, high-quality BiFe 0.92 Mn 0.08 O 3 /BiCrO 3 composite films were obtained by a sol–gel process and a comprehensive investigation of the film growth, domain structure, multiferroic, and optical properties was provided. These novel BiFe 0.92 Mn 0.08 O 3 /BiCrO 3 films exhibit excellent multiferroic characteristics, which can be used as an absorber layer in ferroelectric photovoltaic solar cells. Moreover, the BiCrO 3 -based interlayers can reduce leakage current density of BiFe 0.92 Mn 0.08 O 3 films, resulting in more efficient ferroelectric properties. The superexchange interaction between Fe and Cr is achieved at the BiFe 0.92 Mn 0.08 O 3 /BiCrO 3 interface by the magnetic coupling between Fe 3＋ and Cr 3＋ ions through paramagnetic oxygen atoms, which enhances the ferromagnetic properties of the films. Amazingly, these polarized materials can be tuned to cover more portion of the solar spectrum as a noteworthy spectral red-shift towards the visible region was discovered. This phenomenon was correlated to an occurrence of ferromagnetism, revealing the significant impact of physical materials non central symmetry structure on their chemical behaviors. These findings demonstrate that the BiFe 0.92 Mn 0.08 O 3 /BiCrO 3 films with a narrow direct band gap possess promising applications in photoelectrochemical and multifunctional devices.
研究领域:
材料科学
·
凝聚态物理
·
光学
·
电子工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yuying Wu,Zhangran Gao,Hao Li,Xiaofan Sun,Dong Li,Gang Zhou,Hong-Ling Cai,Xiaoshan Wu
Extraction or injection of charges through the interface in hybrid catalysts is a fascinating strategy for steering charge carrier transfer in solar energy conversion applications. Instead of interfacial charges regulation, we adopt intrinsic spontaneous polarization-modulated internal electric field to drive photo-generated carriers separation and transfer in both the bulk and surface for photocatalysis. Herein, we first report a series of nano-composites made of perovskite ferroelectric BiFe 0.9 Mn 0.1 O 3 and orthorhombic phase α-MoO 3 semiconductor (BFMO- x M, x = 0, 5%, 10%, 15%) via two-step thermal synthesis method. With × = 10%, the heterostructure exhibits significantly enhancement of optical response and photo-decomposion tetracycline capacity under sunlight compared with pure BFMO and M. The improved photocatalysis is attributed to the superimposed actions of the Z-scheme charge transfer through interface and the polarization field in BFMO for the anti-recombination of photo-excited electron-hole pairs. This work indeed offers a strategic design over multicomponent catalyst by consider the synergy of polarization charges and interfacial charge transmission for solar energy conversion.
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
INORGANIC CHEMISTRY COMMUNICATIONS
·
2026
·
IF 5.4
Song Yang,Jian-wei Wang,Xun-yong Yang,Ying-zi He,Zuo Li,Ying-fei Yi,Hong Lu,Zu-hong Xiong,Xu Wang
Multiferroic materials exhibit significant potential for next-generation microelectronics and energy storage applications due to their coupled ferroelectric and magnetic properties. Herein, BiFe 0.98 Mn 0.02 O 3 (BFMO) thin films were deposited on BaTiO 3 (BTO)/Pt/Ti/SiO 2 /Si substrates using sol-gel spin coating, with BTO serving as a buffer layer. X-ray diffraction and scanning electron microscopy revealed well-oriented growth and densified microstructures with reduced grain size in the BiFe 0.98 Mn 0.02 O 3 /BaTiO 3 (BFMO/BTO) bilayer. The BFMO/BTO heterostructure exhibited a marginally higher dielectric constant and lower dielectric loss compared to single-layer BTO films, attributed to interfacial polarization and synergistic interactions between layers. Moreover, a notably low leakage current density on the order of 10 −6 A/cm 2 is observed for the BFMO/BTO films at an applied field of ±300 kV/cm. Furthermore, the BFMO/BTO heterostructure films exhibit remarkably enhanced saturation magnetization of 52 emu/cc and improved maximum polarization of 31.43 μC/cm 2 at RT compared to single-layer films. The polarization-electric field ( P - E ) hysteresis loops indicated slim hysteresis with reduced coercive fields in the BFMO/BTO heterostructure, suggesting improved ferroelectric switching dynamics. In particular, the BFMO/BTO film achieved a remarkable recoverable energy storage density ( W rec ) of 9.99 J/cm 3 at 450 kV/cm. These findings highlight the critical role of interfacial engineering in optimizing multiferroic and energy storage properties, offering valuable insights for moderate electric field energy storage devices.
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DOI
高影响因子
Bioresources and Bioprocessing
·
2022
·Vol. 9
·期 1
·1-16
·
IF 4.983
Sun Bing-Yao,Sui Hua-Lu,Liu Zi-Wei,Tao Xin-Yi,Gao Bei,Zhao Ming,Ma Yu-Shu,Zhao Jian,Liu Min,Wang Feng-Qing,Wei Dong-Zhi
Indirubin is a bisindole compound for the treatment of chronic myelocytic leukemia. Here, we presented a structure-guided method to improve the activity of a flavin-containing monooxygenase (bFMO) for the efficient production of indirubin in Escherichia coli. A flexible loop interlocked with the active pocket through a helix and the substrate tunnel rather than the active pocket in bFMO were identified to be two reconfigurable structures to improve its activity, resulting in K223R and N291T mutants with enhanced catalytic activity by 2.5- and 2.0-fold, respectively. A combined modification at the two regions (K223R/D317S) achieved a 6.6-fold improvement in catalytic efficiency (kcat/Km) due to enhancing π–π stacking interactions stabilization. Finally, an engineered E. coli strain was constructed by metabolic engineering, which could produce 860.7 mg/L (18 mg/L/h) indirubin, the highest yield ever reported. This work provides new insight into the redesign of FMOs to boost their activities and an efficient approach to produce indirubin.
研究领域:
生物化学
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生物技术
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酶工程
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代谢途径优化
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产品关联
DOI
PubMed
高影响因子
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