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Article
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Summary: A novel Bi2SiO5/Bi12SiO20 heterojunction photocatalyst with efficient charge separation and high photocatalytic activity has been synthesized using microwave hydrothermal synthesis. The photocatalyst exhibits improved performance compared to Bi12SiO20 due to its larger specific surface area, good crystallinity, smaller particle morphology, and enhanced charge separation ability via the heterojunctions.
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Yulia A. Belik et al.
Summary: The study identifies the key role played by the stable Bi(III)-EG complex in the reduction of Bi3+ to a metallic state during the synthesis of bismuth silicates. By considering factors such as solvent, precipitation agent, Si-containing component, and calcination procedure, bismuth silicate composite materials with high photocatalytic performance can be obtained.
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Ziyauddin S. Qureshi et al.
Summary: This study investigates the production of butadiene and light olefins from n-butane through oxidative conversion. The use of nanocomposites of Ni-Bi-Si oxides comprising Bi12SiO20/Bi(2)SiO(5) phase regulated with different zeolites results in varying ratios of Bi(12)SiO(20) and Bi2SiO5 phases. The catalysts' reducibility and acidity are controlled by the interaction between active species and zeolites. The Ni-Bi-O/ZSM-5(1500) catalyst exhibits high selectivity for the oxidative conversion of n-butane to ethylene and propylene, while the NiO-Bi12SiO20-Bi2SiO5/ZSM-5(280) catalyst shows high olefinic selectivity.
MOLECULAR CATALYSIS
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Energy & Fuels
Xiushuai Guan et al.
Summary: Metal-modified nanomaterials, such as metallic Bi self-doped Bi2SiO5 composites, have shown improved photocatalytic CO2 reduction performance. In this study, the composites were synthesized using a hydrothermal method with the assistance of NaOH. The addition of NaOH increased the specific surface area and dissolved out metallic Bi contents, resulting in the enhanced activity and stability of the Bi/Bi2SiO5 composites. The surface plasmonic resonance effect, strong light absorption ability, and interfacial interaction were identified as the main reasons for the improved performance.
Article
Chemistry, Physical
Lin Dou et al.
Summary: Visible light responsive flower-like Bi2SiO5 photocatalysts with ample oxygen vacancies (OVs) were successfully synthesized via a template-free solvothermal treatment process. By adjusting the content of OVs, the photocatalytic efficiency was improved, and the degradation of tetracycline was enhanced.
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Toton Haldar et al.
Summary: Metacomposites of Bi2SiO5 (BSO) and multiwall carbon nanotubes (MWCNT) with adjustable negative permittivity were prepared using a hydrothermal method. The interconnected MWCNT formed a three-dimensional conductive network in the metacomposites, leading to the tunable negative permittivity attributed to the low-frequency plasmon resonance of free Drude carriers. The study also investigated the impact of direct current biasing voltage on the negative permittivity characteristics in the radio frequency region, providing a novel strategy for adjusting the negative permittivity value for potential applications in sensors.
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Chemistry, Physical
Sara Shafafi et al.
Summary: The study successfully developed TiO2/Bi2SiO5 photocatalysts with n-n heterojunction under visible light, showing outstanding potency in degrading various organic contaminants. The enhanced photocatalytic activity was attributed to the formation of n-n heterojunction, increased visible-light absorption, and expanded surface area of the TiO2/Bi2SiO5 nanocomposites.
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Toton Haldar et al.
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(2021)
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Kengo Sakamoto et al.
Summary: In this study, Bismuth silicate (BSO) ceramics were successfully fabricated for the first time using a sol-gel technique, achieving a high relative density and preventing thermal decomposition at low temperature. The BSO ceramic exhibited superior temperature stability and high energy storage efficiency, attributed to a sharp phase transition and unique polarization hysteresis loops.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Physics, Multidisciplinary
Toton Haldar et al.
Summary: This study investigates the temperature and field-dependent magnetic properties of Bi2SiO5/multiwall carbon nanotube nanocomposites prepared by hydrothermal method, with different content of magnetic MWCNT. The research reveals a complex magnetism in these nanocomposites, showcasing the co-existence of ferromagnetism and superconductivity.
Article
Chemistry, Physical
Lin Dou et al.
Summary: 3D nanoflower-like BiOI/Bi2SiO5 heterojunctions were successfully synthesized in the presence of ionic liquid [PrMIm]I by a mild solvothermal method. These heterojunctions exhibit high photocatalytic performance, stability, and photoinduced charge separation mechanism.
APPLIED SURFACE SCIENCE
(2021)
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Chemistry, Physical
Yiwen Xie et al.
Summary: A novel nanoscale leaf-like ternary Bi2SiO5/Ag/AgBr photocatalyst was synthesized by means of a hydrothermal reaction and in situ photoreduction procedure. The surface of AgBr was wrapped with nano-sheet Bi2SiO5, hindering the growth of AgBr nanoparticles and reducing their size from 5 um to approximately 0.6 um. The incorporation of Bi2SiO5 led to an increase in the chance of contact between the active center and the reactant, enhancing the photocatalytic activity.
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Optics
Dongxun Chen et al.
Summary: In this study, Nd3+-doped Bi2SiO5 nanospheres were developed as nanothermometers to monitor biological processes. These nanospheres can be excited by an 808 nm near infrared laser and emit in the near infrared range due to the characteristic transitions of Nd3+. The luminescence intensity ratio of two spectrally separated emission peaks from Nd3+ can be used for luminescent ratiometric thermal sensing, showing promising potential for temperature probes in nanothermometry applications.
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T. V. Bermeshev et al.
Summary: The study investigated the effects of heat treatment conditions on the phase composition and structure of solidification products in a melt containing 50 mol.% Bi2O3 and 50 mol.% SiO2. It was found that the holding temperature and time, as well as the cooling rate of the melt, crucially influenced the crystallization of metastable Bi2SiO5 and the formation of stable phase crystals. These findings were determined using physicochemical methods such as powder X-ray diffraction and electron microscopy.
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Debashrita Sarkar et al.
Summary: Efficient charge separation upon light irradiation is crucial for determining the photocatalytic activity efficiency. Oxygen vacancy rich Bi2SiO5 nanoparticles were synthesized using a hydrothermal approach to achieve superior charge separation. The incorporation of halide anions led to the generation of oxygen vacancy sites and preferential growth of the monoclinic phase. The synergetic effect of halide ions and oxygen vacancy sites on the surface enhanced the photocatalytic activity of the Bi2SiO5 nanoparticles.
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