Dai-Phat Bui

University of Oklahoma | ou · School of Chemical, Biological and Materials Engineering

Photocatalytic materials present a robust approach in tackling pollutants in the air. However, the involving reactions and their associated toxicity, those are important for practical implications, have not been sufficiently reported. Here, we synthesize ZnSn(OH)6 and control its morphology by changing NaOH's dosage in a one-step hydrothermal growt...

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 o...

Polar polymers such as poly(vinyl alcohol-co-ethylene) (EVOH) serve as excellent oxygen barriers in multilayered polymer films. However, their presence creates significant challenges for subsequent recycling. Melting and thermal degradation leave behind small domains of immiscible phases that render the final material less valuable. Here, we report...

Selective dehydration of polyalcohols over zeolites containing Brønsted acids is a promising approach to purify and recycle multilayer polymer films consisting of non-polar polymers such as polyethylene and polar polymers like ethylene–vinyl alcohol copolymer. In addition, polar aprotic solvents can be utilized to improve the diffusion of polymer m...

Hydrogen peroxide (H2O2) can be considered as one of the world's indispensable chemicals. However, the synthetic process can prompt several severe environmental and human health issues. However, solar H2O2 production may provide opportunities to mitigate such issues. Graphitic carbon nitride (g‐C3N4) has emerged as one promising material for photoc...

Elucidating the impact of heteroatoms in graphitic carbon nitrides (g‐C3N4) is of utmost importance to rationalize materials. Hence, in this study, oxygen‐doped g‐C3N4 containing trace amounts of halogen in the structures for piezo‐photosynthesis of hydrogen peroxides (H2O2) is fabricated. The findings reveal that oxygen atoms may be inserted into...

The combination of two dielectric-magnetic components in the same composite has been shown to significantly improve the effectiveness of electromagnetic (EM) shielding and microwave absorption (MWA) because they have both a combination of high dielectric and magnetic losses and good impedance matching. The novel Bi1/2(Na0.8K0.2)1/2TiO3/Fe3O4 (BNKT/...

Sustainability in catalysis is increasingly becoming the primary target in academic and industrial studies. Regarding the material perspective, designing heterojunction nanocatalysts to produce small molecules, such as hydrogen peroxide (H 2 O 2), has been an attractive research theme in recent decades. Nonetheless, most reported materials suffer f...

Nitric oxide (NO) pollution presents a pressing issue in preserving the air quality for sustainable development. It is highly desirable to employ robust photocatalytic materials for addressing NO pollution in an energy-efficient fashion. Here, Ag/g-C3N4 heterojunctions are successfully fabricated via a photo-reduction approach. Ag nanoparticles are...

Photocatalysis has been studied and considered as a green and effective 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 o...

Photocatalysis has been studied and considered as a green and effective 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 o...

Photocatalysis has been studied and considered as a green and effective 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 o...

Photocatalysis has been studied and considered as a green and effective 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 o...

Herein, we report on the facile fabrication of g-C3N4/SnO2 S-scheme heterojunctions for photocatalytic removal of NO under visible light. Optical and electrochemical investigations indicate the formation of these heterojunctions that enable bending at the interface of g-C3N4 and SnO2 and give rise to an efficient separation. A high photocatalytic 5...

NO x emissions cause many negative impacts on the living environment. The photocatalysis of semiconductors is superior for nitric oxide (NO) degradation due to their low redox potential. In this report, we combine SnO 2-x /g-C 3 N 4 heterojunction photocatalyst toward the high selectivity into green products under visible light illumination. Result...

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-C3N4 nanosheets-assisted SnO2 nanoparticles (g-C3N4/SnO2) is successfully synthesized and used for degrading nitrogen oxide (NO), which causes negative impacts on the environment. A...

Photocatalysis is an emerging tool used for the reduction of air pollutants. In the atmosphere, nitrogen oxide (NO) is one of the leading pollutants because of its detrimental effects on flora and fauna. This work introduces the photocatalytic NO degradation over Ag nanoparticles-decorated Bi2S3 nanorods. The XRD, FTIR, XPS, SEM, EDS, and TEM demon...

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 SnO2/Bi2S3/BiOCl–Bi24O31Cl10 (SnO2/Bi2S3...

This chapter compares the properties of different light sources. A comprehensive comparison reports the advantages and disadvantages of chemical reduction and photoreduction methods. The role of light in the nanoparticle formation mechanism is proposed with the evidence from previous studies. Interestingly, the factors affecting the properties of n...

BACKGROUND Efficient and stable photocatalysts are essential for the removal of organic dyes in wastewater. Here, the nanocomposites of conjugated polyvinyl chloride supported on hydrothermally synthesized titanium dioxide nanotubes (cPVC/TNTs) were fabricated by a simple annealing process. Their photocatalytic ability and reaction mechanisms were...

Herein, Ag@SnO2 nanocomposite (NC) is prepared by UV-assisted depositing of Ag nanoparticles (NPs) onto hydrothermally synthesized SnO2 NPs surface without any additional assistance. To characterize the NC, transmission electron microscope (TEM) images, selected area electron diffraction (SAED), X-ray diffraction (XRD), and energy-dispersive X-ray...

Visible-light-driven graphite-like carbon nitride/TiO2 nanotubes (g-C3N4/TNTs) heterostructures were synthesized by hydrothermal and calcination processes. The g-C3N4/TNTs heterostructures with the different weight ratios of g-C3N4 to TNTs, from 0.5 wt% to 5 wt%, were characterized by modern methods of physical-chemical analysis. The photocatalytic...

This is the first time, the SnO2/PANI nanocomposite was utilized for the nitrogen oxide (NO) photocatalytic degradation. In addition, the properties of the SnO2/PANI nanocomposite were deeply studied by various characterizations. The results showed that the photostability of PANI has been improved and the SnO2/PANI nanocomposite demonstrated the ef...

Tin oxide nanoparticles (SnO2 NPs) with a diameter less than 10 nm are usually used in waste water treatment via the photocatalytic reaction. However, SnO2 nanoparticles were not clearly studied for this NO photodegradation. In this study, SnO2 NPs were hydrothermally prepared and measured via characterization techniques such as high-resolution tra...

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) powde...

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 spectro...

In this study, we classified the effect of the annealing temperature on silver-loaded TiO2 nanotubes (Ag/TNTs). X-ray diffraction results demonstrate that TNTs have a tendency of phase transformation owing to silver nanoparticles (Ag NPs). The Brunauer–Emmett–Teller method indicates that Ag/TNTs is a mesopore material and the surface area of Ag/TNT...