Publications by authors named "Bui Dai Phat"

Photocatalysis has been studied and considered as a green and practical approach in addressing environmental pollution. However, factors that affect photocatalytic performance have not been systematically studied. In this work, we have presented a comprehensive roadmap for characterizing, interpreting, and reporting semiconductors' electrical and optical properties through routinely used techniques such as diffuse reflectance spectroscopy, electrochemical techniques (Mott-Schottky plots), photoluminescence, X-ray photoelectron spectroscopy, and ultraviolet photoelectron spectroscopy in the context of photocatalysis.

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Enhancing and investigating the photocatalytic activity over composites for new models remains a challenge. Here, an emerging S-scheme photocatalyst composed of 2D/0D g-CN nanosheets-assisted SnO nanoparticles (g-CN/SnO) is successfully synthesized and used for degrading nitrogen oxide (NO), which causes negative impacts on the environment. A wide range of characterization techniques confirms the successful synthesis of SnO nanoparticles, g-CN nanosheets, and 2D/0D g-CN/SnO S-scheme photocatalysts via hydrothermal and annealing processes.

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The pursuit of robust photocatalysts that can completely degrade organic contaminants with high performance as well as high energy efficiency, simplicity in preparation, and low cost is an appealing topic that potentially promotes photocatalysts for being used widely. Herein, we introduce a new and efficient SnO/BiS/BiOCl-BiOCl (SnO/BiS-Bi25) composite photocatalyst by taking advantage of the robust, simple, and potentially scalable one-pot synthesis, including the hydrothermal process followed by thermal decomposition. Interestingly, we observed the formation of BiOCl-BiOCl (abbreviated as Bi25) heterojunctions derived from reactions between BiS and SnCl·5HO precursor solutions under the hydrothermal condition and thermal decomposition of BiOCl.

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Synthesis of reduced graphene oxide/TiO₂ nanotubes (rGO/TNTs) composite is being attended. However, the synthesis of rGO/TNTs composite directly from graphite oxide with a greener approach is still challenging. In this study, we directly synthesized rGO/TNTs composite by a simple method from graphite oxide and titanium dioxide nanotube (TNTs) powder without involving any assistant agents.

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Titania (TiO) as a commercial photocatalyst has been continually struggling due to the limitation of ultraviolet light response and the high recombination rate of photoinduced carriers. The development of heterojunction nanostructures provides great promise to achieve the activation by visible light and suppress the photoinduced electron-hole pairs recombination. Herein, we synthesized a SnO and TiO nanotube heterojunction (SnO/TNT) via a one-step hydrothermal strategy and systematically investigated NO photocatalytic degradation over the SnO/TNTs heterojunction under visible light at the parts per billion level.

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Here, we synthesized copper(i) oxide and titanium dioxide nanotubes (TNTs) heterojunctions (HJs) by a photoreduction method using a low-power UV lamp without involving any additional steps, such as chemical reduction, surfactant, or protection agents. Transmission electron microscopy, X-ray diffraction, Raman scattering, X-ray photoelectron spectroscopy, diffuse reflectance spectra, and photoluminescence spectroscopy were carried out to verify the formation of a HJ between the CuO nanoparticles (CuO NPs) and TNTs. The efficiency and the rate of methylene blue photo-degradation over the CuO/TNTs HJ were found to be nearly double and triple compared to the isolated TNTs.

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