TiS2 transformation into S-doped and N-doped TiO2 with visible-light catalytic activity

Lin, Yu Chen; Chien, Tzu En; Lai, Po Chih; Chiang, Yu Hsien; Li, Kun Lin; Lin, Ja‐Chen

doi:10.1016/j.apsusc.2015.10.004

Cited by 24 publications

(10 citation statements)

References 47 publications

(44 reference statements)

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“…There have been many attempts to expand the photocatalytic activity of TiO 2 to the visible-light region [1][2][3][4]. Nitrogen doping among the various surface modification methods of TiO 2 has the advantages of ease of manufacture and eco-friendliness [5][6][7]. Nitrogen doping on TiO 2 can be prepared by a relatively simple method, and it has the advantage that N is doped on the most effective dopant due to its similar size to oxygen and metastable defect complex, as well as small ionization energy [8].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Properties of Amorphous N-Doped TiO2 Photocatalyst under Visible Light Irradiation

et al. 2021

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Amorphous TiO2 doped with N was characterized by its photocatalytic activity under visible light irradiation. The amorphous N-doped TiO2 was prepared by the sol-gel method through heat treatment at a low temperature. The photocatalyst showing activity in visible light despite heat treatment at low temperature can be applied to plastics and has excellent utility. The N-doped TiO2 appeared amorphous when heat-treated at 130 °C. It was converted into an anatase-type N-doped TiO2 when this was calcined at 500 °C. The photocatalyst showed photocatalytic activities in the photocatalytic decomposition of formaldehyde and methylene blue under visible light irradiation. The photocatalyst exhibited a higher rate of hydrogen production than that of TiO2 in photocatalytic decomposition of water under liquid-phase plasma irradiation. The bandgap of the amorphous N-doped TiO2 measured by investigation of optical properties was 2.4 eV. The lower bandgap induced the photocatalytic activities under visible light irradiation.

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Section: Introductionmentioning

confidence: 99%

Photocatalytic Properties of Amorphous N-Doped TiO2 Photocatalyst under Visible Light Irradiation

et al. 2021

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“…Methods for preparing TiO 2 nanostructures include electro-chemical synthesis, chemical synthesis and alkaline hydrothermal method. Among them, the hydrothermal approach is quite simple and enables the production of various TiO 2 nano-structures, especially for TiO 2 1D structures [6,7].…”

Section: Introductionmentioning

confidence: 99%

Influence of Na⁺ content on the structure and morphology of TiO₂ nanoparticles prepared by hydrothermal transformation of alkaline titanate nanotubes

Xiong

2017

Journal of Experimental Nanoscience

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The objective of this study is to investigate the role of Na + content in the morphology evolution of TiO 2 nanoparticles prepared by hydrothermal approach. Various TiO 2 morphology from 0-dimensional (0D) nanoparticles to 1-dimensional (1D) nanorods were synthesised by hydrothermally treating the alkali titanate nanotubes with different Na + content. The XRD patterns show the phase transformation and crystallographic nature of alkali titanate nanotubes are strongly dependent on the Na + content, the cation exchange of Na + by H + ion exchange affects the crystallinity of the tubes and causes disorder of the interlayers of nanotubes. The SEM and TEM images confirm that Na + rich titanate nanotubes were thermally stable. Moreover, BET measurements revealed that the Na + content plays an important role on the specific surface area of formed TiO 2 nanoparticles. The photocatalytic activity of the TiO 2 nanoparticles was characterised via the decomposition rate of an aqueous solution of methyl orange (MO) under UV light irradiation. The TiO 2 nanoparticles prepared by hydrothermally treating the alkali titanate nanotubes with no Na + content has a surface area of 55.1 m 2 /g with nearly 100% photodecomposition of MO in 20 min.

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“…Recently, it has been proved that several non- or weakly luminescent test molecules, such as terephthalic acid [37,38] and coumarin [39,40] produce strongly luminescent compounds with •OH radical, and these molecules can be applied for evaluation of the relative photocatalytic activity of the photocatalyst. Here coumarin is used as a probe to evaluate the photocatalytic activity of TiO 2 nanorods.…”

Section: Resultsmentioning

confidence: 99%

Thiourea-Modified TiO2 Nanorods with Enhanced Photocatalytic Activity

Fang

Zheng

et al. 2016

Molecules

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Semiconductor TiO 2 photocatalysis has attracted much attention due to its potential application in solving the problems of environmental pollution. In this paper, thiourea (CH 4 N 2 S) modified anatase TiO 2 nanorods were fabricated by calcination of the mixture of TiO 2 nanorods and thiourea at 600˝C for 2 h. It was found that only N element was doped into the lattice of TiO 2 nanorods. With increasing the weight ratio of thiourea to TiO 2 (R) from 0 to 8, the light-harvesting ability of the photocatalyst steady increases. Both the crystallization and photocatalytic activity of TiO 2 nanorods increase first and then decrease with increase in R value, and R2 sample showed the highest crystallization and photocatalytic activity in degradation of Brilliant Red X3B (X3B) and Rhodamine B (RhB) dyes under visible light irradiation (λ > 420 nm). The increased visible-light photocatalytic activity of the prepared N-doped TiO 2 nanorods is due to the synergistic effects of the enhanced crystallization, improved light-harvesting ability and reduced recombination rate of photo-generated electron-hole pairs. Note that the enhanced visible photocatalytic activity of N-doped nanorods is not based on the scarification of their UV photocatalytic activity.

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TiS2 transformation into S-doped and N-doped TiO2 with visible-light catalytic activity

Cited by 24 publications

References 47 publications

Photocatalytic Properties of Amorphous N-Doped TiO2 Photocatalyst under Visible Light Irradiation

Photocatalytic Properties of Amorphous N-Doped TiO2 Photocatalyst under Visible Light Irradiation

Influence of Na⁺ content on the structure and morphology of TiO₂ nanoparticles prepared by hydrothermal transformation of alkaline titanate nanotubes

Thiourea-Modified TiO2 Nanorods with Enhanced Photocatalytic Activity

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TiS2 transformation into S-doped and N-doped TiO2 with visible-light catalytic activity

Cited by 24 publications

References 47 publications

Photocatalytic Properties of Amorphous N-Doped TiO2 Photocatalyst under Visible Light Irradiation

Photocatalytic Properties of Amorphous N-Doped TiO2 Photocatalyst under Visible Light Irradiation

Influence of Na+ content on the structure and morphology of TiO2 nanoparticles prepared by hydrothermal transformation of alkaline titanate nanotubes

Thiourea-Modified TiO2 Nanorods with Enhanced Photocatalytic Activity

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Influence of Na⁺ content on the structure and morphology of TiO₂ nanoparticles prepared by hydrothermal transformation of alkaline titanate nanotubes