Dai-Phat Bui

Dai-Phat Bui
University of Oklahoma | ou · School of Chemical, Biological and Materials Engineering

Bachelor of Science

About

25
Publications
4,274
Reads
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293
Citations
Introduction
Dai-Phat is a Ph.D. student in Chemical Engineering at the University of Oklahoma. His research focuses on fabricating, investigating, and applying (photo)catalysts with remarkable properties for energy (H2 evolution) and environmental applications (DeTox, DeNOx, DeVOC). Website: http://daiphatbui.com/ Email: daiphatbui301196@gmail.com
Additional affiliations
August 2020 - present
University of Oklahoma
Position
  • Research Assistant
July 2017 - January 2018
Chung Yuan Christian University
Position
  • Research Assistant
September 2016 - August 2020
Ho Chi Minh City University of Technology (HUTECH)
Position
  • Research Assistant
Education
August 2020 - August 2025
University of Oklahoma
Field of study
  • Chemical Engineering
September 2014 - September 2018
Ho Chi Minh City University of Science
Field of study
  • Materials Science

Publications

Publications (25)
Article
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...
Article
Full-text available
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...
Preprint
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...
Preprint
Full-text available
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...
Preprint
Full-text available
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...
Article
Full-text available
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...
Article
Full-text available
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...
Article
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...
Article
Full-text available
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...
Article
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...
Article
Full-text available
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...
Chapter
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...
Article
Full-text available
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 mechanism were a...
Article
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...
Article
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...
Article
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...
Article
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...
Article
Full-text available
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...
Article
Full-text available
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...
Article
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...

Questions

Question (1)
Question
I want to analyze an UPS of my materials. However, there is a lot of formulas and definitions which are inconsistent with each other. Therefore, I make this discussion to clarify them.
1) For the binding energy (BE) at 0 eV of UPS, it is Fermi level or Vacuum level ?
1.1) And if it is Fermi level, will the fitting of a straight line into the leading edge be Valence band maximum (VBM) ?
And if it is Vacuum level, what is the fitting of a straight line into the leading edge ? And how to determine the Fermi energy and VBM in this case? The fermi energy can be at 50% of the fitting straight line ?
1.2) How to calculate the work function (WF) from UPS, I have seen a lot formulas such as: WF = 21.22 - (E vacumm - Efermi); WF = 21.22 - (Secondary onset position - VBM) and WF = 21.22 - Secondary onset position. So which one is the best ?
1.3) And, have you ever seen an UPS with intensity increasing continously instead of cutting off to 0 (cps)? For this situation, how to calculate WF
2) For the XPS, the BE at 0 eV is Vacuum ? And can I use the fitting of a straightline into the leading edge to determine the VBM ?
If I have UPS and XPS of a sample, which VBM should I use to draw the band energy of my material ? And is there any result I can take from both ? If yes, can you help me to understand what is better ?
Thanks a lot for your discussion.

Projects

Projects (4)
Project
+ Synthesis of advanced materials + Investigation of NO removal by photocatalytic reaction + Determination of primary factor of the NO removal photocatalytic reaction + 10 ISI papers