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Diffuse reflectance infrared fourier transform

About: Diffuse reflectance infrared fourier transform is a research topic. Over the lifetime, 6170 publications have been published within this topic receiving 171498 citations.


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Journal ArticleDOI
TL;DR: Pt, Au and Pd deposited TiO2 have been prepared and characterised by surface analytical methods such as surface area, XRD, and scanning electron micrograph and photophysical characterisation by diffuse reflectance spectroscopy.

816 citations

Journal ArticleDOI
TL;DR: The work found a new application of the photocatalyst, Ag3PO4/g-C3N4, in simultaneous environmental protection and energy production.
Abstract: This research was designed for the first time to investigate the activities of photocatalytic composite, Ag3PO4/g-C3N4, in converting CO2 to fuels under simulated sunlight irradiation. The composite was synthesized using a simple in situ deposition method and characterized by various techniques including Brunauer–Emmett–Teller method (BET), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectroscopy (DRS), photoluminescence spectroscopy (PL), and an electrochemical method. Thorough investigation indicated that the composite consisted of Ag3PO4, Ag, and g-C3N4. The introduction of Ag3PO4 on g-C3N4 promoted its light absorption performance. However, more significant was the formation of heterojunction structure between Ag3PO4 and g-C3N4, which efficiently promoted the separation of electron–hole pairs by a Z-scheme mechanism and ultimately ...

794 citations

Journal ArticleDOI
TL;DR: In this article, the authors used the Kubelka-Munk radiative transfer model to measure the diffuse reflectance of TiO2 semiconductor coatings, such as are used for water splitting, and found that while the band gap wavelength is extended into the visible region, it is overestimated.

756 citations

Journal ArticleDOI
TL;DR: In this article, an electron beam treatment of commercial TiO2 (p-TiO2) nanoparticles was used to obtain visible light-active nanoparticles, which exhibited a distinct red-shift in the UV-visible absorption spectrum and a much narrower band gap (2.85 eV) due to defects.
Abstract: Visible light-active TiO2 (m-TiO2) nanoparticles were obtained by an electron beam treatment of commercial TiO2 (p-TiO2) nanoparticles. The m-TiO2 nanoparticles exhibited a distinct red-shift in the UV-visible absorption spectrum and a much narrower band gap (2.85 eV) due to defects as confirmed by diffuse reflectance spectroscopy (DRS), photoluminescence (PL), X-ray diffraction, Raman spectroscopy, electron paramagnetic resonance, transmission electron microscopy, X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS) and linear scan voltammetry (LSV). The XPS revealed changes in the surface states, composition, Ti4+ to Ti3+ ratio, and oxygen deficiencies in the m-TiO2. The valence band XPS, DRS and PL results were carefully examined to understand the band gap reduction of m-TiO2. The visible light-responsive enhanced photocatalytic activity of m-TiO2 was demonstrated by degrading methylene blue and brilliant blue G. The EIS and LSV in the dark and under visible light irradiation further support the visible light-induced photocatalytic activities of the m-TiO2 due to a decrease in electron transfer resistance and an increase in photocurrent. This study confirms that m-TiO2 can be used effectively as a photocatalyst and photoelectrode material owing to its enhanced visible light-induced photocatalytic activity.

712 citations

Journal Article
TL;DR: In this paper, optical properties of unsupported or powdered nanostructures are frequently determined through UV-Vis absorption spectroscopy of their dispersed solutio-graphs.
Abstract: Resumen en: Optical properties of un-supported or powdered nanostructures are frequently determined through UV-Vis absorption spectroscopy of their dispersed solutio...

676 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023290
2022554
2021337
2020336
2019421
2018423