TiO2 derived from TiC reaction in HNO3

Investigating the origin of textural change and enhanced visible-light absorption and applications in catalysis

Dong Lin Shieh, Sin Jhang Huang, Yu-Cheng Lin, Yi Shiue Lin, Jong-Liang Lin, Te Fu Yeh, Hsisheng Teng

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4 Citations (Scopus)

Abstract

This paper presents the decomposition of TiC in nitric acid aqueous solution at 70°C to form porous TiO2 (anatase) containing both N and C atoms (N,C-TiO2), with visible-light sensitive catalytic activities (λ > 400 nm). TiC is gradually dissolved in the solution and transformed into spherically shaped TiO2 nanoparticles in the initial reaction stage. As these spherical particles grow to a certain size (> ∼150 nm), aggregation occurs to form porous, irregular particles. The X-ray photoelectron study indicates that the anatase contains N and C atoms with multiple bonding states. The presence of these impurities induces significantly enhanced visible light absorption, as compared to the N- or C-doped case. This porous, N and C-containing anatase shows versatile photoactivities. Under visible light irradiation, the N,C-modified TiO2 can catalyze OH radical formation demonstrated by hydroxylation of terephthalic acid. Photocatalytic degradation of methylene blue (MB) on the N,C-modified TiO 2, an air-solid model system for self-surface cleaning, at wavelengths of 314, 366, 436 and 520 nm is investigated, and exhibits a relative efficiency ratio of 1.00:0.85:0.71:0.32 after 30 min photoirradiation. The quantum yields for visible-light wavelengths of 436 and 520 nm are roughly estimated to be 4.0 × 10-5 and 1.8 × 10-5 MB molecule per photon, respectively. H2 production from water reduction over the N,C-modified TiO2 loaded with PtOx is also demonstrated.

Original languageEnglish
Pages (from-to)237-244
Number of pages8
JournalMicroporous and Mesoporous Materials
Volume167
DOIs
Publication statusPublished - 2013 Jan 1

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electromagnetic absorption
anatase
Titanium dioxide
Light absorption
Catalysis
catalysis
Methylene Blue
methylene blue
Surface cleaning
Nitric Acid
Wavelength
Atoms
Hydroxylation
nitric acid
Quantum yield
Nitric acid
Photoelectrons
wavelengths
cleaning
atoms

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials

Cite this

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title = "TiO2 derived from TiC reaction in HNO3: Investigating the origin of textural change and enhanced visible-light absorption and applications in catalysis",
abstract = "This paper presents the decomposition of TiC in nitric acid aqueous solution at 70°C to form porous TiO2 (anatase) containing both N and C atoms (N,C-TiO2), with visible-light sensitive catalytic activities (λ > 400 nm). TiC is gradually dissolved in the solution and transformed into spherically shaped TiO2 nanoparticles in the initial reaction stage. As these spherical particles grow to a certain size (> ∼150 nm), aggregation occurs to form porous, irregular particles. The X-ray photoelectron study indicates that the anatase contains N and C atoms with multiple bonding states. The presence of these impurities induces significantly enhanced visible light absorption, as compared to the N- or C-doped case. This porous, N and C-containing anatase shows versatile photoactivities. Under visible light irradiation, the N,C-modified TiO2 can catalyze OH radical formation demonstrated by hydroxylation of terephthalic acid. Photocatalytic degradation of methylene blue (MB) on the N,C-modified TiO 2, an air-solid model system for self-surface cleaning, at wavelengths of 314, 366, 436 and 520 nm is investigated, and exhibits a relative efficiency ratio of 1.00:0.85:0.71:0.32 after 30 min photoirradiation. The quantum yields for visible-light wavelengths of 436 and 520 nm are roughly estimated to be 4.0 × 10-5 and 1.8 × 10-5 MB molecule per photon, respectively. H2 production from water reduction over the N,C-modified TiO2 loaded with PtOx is also demonstrated.",
author = "Shieh, {Dong Lin} and Huang, {Sin Jhang} and Yu-Cheng Lin and Lin, {Yi Shiue} and Jong-Liang Lin and Yeh, {Te Fu} and Hsisheng Teng",
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T2 - Investigating the origin of textural change and enhanced visible-light absorption and applications in catalysis

AU - Shieh, Dong Lin

AU - Huang, Sin Jhang

AU - Lin, Yu-Cheng

AU - Lin, Yi Shiue

AU - Lin, Jong-Liang

AU - Yeh, Te Fu

AU - Teng, Hsisheng

PY - 2013/1/1

Y1 - 2013/1/1

N2 - This paper presents the decomposition of TiC in nitric acid aqueous solution at 70°C to form porous TiO2 (anatase) containing both N and C atoms (N,C-TiO2), with visible-light sensitive catalytic activities (λ > 400 nm). TiC is gradually dissolved in the solution and transformed into spherically shaped TiO2 nanoparticles in the initial reaction stage. As these spherical particles grow to a certain size (> ∼150 nm), aggregation occurs to form porous, irregular particles. The X-ray photoelectron study indicates that the anatase contains N and C atoms with multiple bonding states. The presence of these impurities induces significantly enhanced visible light absorption, as compared to the N- or C-doped case. This porous, N and C-containing anatase shows versatile photoactivities. Under visible light irradiation, the N,C-modified TiO2 can catalyze OH radical formation demonstrated by hydroxylation of terephthalic acid. Photocatalytic degradation of methylene blue (MB) on the N,C-modified TiO 2, an air-solid model system for self-surface cleaning, at wavelengths of 314, 366, 436 and 520 nm is investigated, and exhibits a relative efficiency ratio of 1.00:0.85:0.71:0.32 after 30 min photoirradiation. The quantum yields for visible-light wavelengths of 436 and 520 nm are roughly estimated to be 4.0 × 10-5 and 1.8 × 10-5 MB molecule per photon, respectively. H2 production from water reduction over the N,C-modified TiO2 loaded with PtOx is also demonstrated.

AB - This paper presents the decomposition of TiC in nitric acid aqueous solution at 70°C to form porous TiO2 (anatase) containing both N and C atoms (N,C-TiO2), with visible-light sensitive catalytic activities (λ > 400 nm). TiC is gradually dissolved in the solution and transformed into spherically shaped TiO2 nanoparticles in the initial reaction stage. As these spherical particles grow to a certain size (> ∼150 nm), aggregation occurs to form porous, irregular particles. The X-ray photoelectron study indicates that the anatase contains N and C atoms with multiple bonding states. The presence of these impurities induces significantly enhanced visible light absorption, as compared to the N- or C-doped case. This porous, N and C-containing anatase shows versatile photoactivities. Under visible light irradiation, the N,C-modified TiO2 can catalyze OH radical formation demonstrated by hydroxylation of terephthalic acid. Photocatalytic degradation of methylene blue (MB) on the N,C-modified TiO 2, an air-solid model system for self-surface cleaning, at wavelengths of 314, 366, 436 and 520 nm is investigated, and exhibits a relative efficiency ratio of 1.00:0.85:0.71:0.32 after 30 min photoirradiation. The quantum yields for visible-light wavelengths of 436 and 520 nm are roughly estimated to be 4.0 × 10-5 and 1.8 × 10-5 MB molecule per photon, respectively. H2 production from water reduction over the N,C-modified TiO2 loaded with PtOx is also demonstrated.

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