Nitrogen-doped anatase nanofibers decorated with noble metal nanoparticles for photocatalytic production of hydrogen

Ming Chung Wu; Jussi Hiltunen; András Sápi; Anna Avila; William Larsson; Hsueh Chung Liao; Mika Huuhtanen; Géza Tóth; Andrey Shchukarev; Noémi Laufer; Ákos Kukovecz; Zoltán Kónya; Jyri Pekka Mikkola; Riitta Keiski; Wei Fang Su; Yang Fang Chen; Heli Jantunen; Pulickel M. Ajayan; Robert Vajtai; Krisztián Kordás

doi:10.1021/nn201111j

Nitrogen-doped anatase nanofibers decorated with noble metal nanoparticles for photocatalytic production of hydrogen

Ming Chung Wu, Jussi Hiltunen, András Sápi, Anna Avila, William Larsson, Hsueh Chung Liao, Mika Huuhtanen, Géza Tóth, Andrey Shchukarev, Noémi Laufer, Ákos Kukovecz, Zoltán Kónya, Jyri Pekka Mikkola, Riitta Keiski, Wei Fang Su, Yang Fang Chen, Heli Jantunen, Pulickel M. Ajayan, Robert Vajtai^*, Krisztián Kordás

^*Corresponding author for this work

Research output: Contribution to journal › Journal Article › peer-review

136 Scopus citations

Abstract

We report the synthesis of N-doped TiO₂ nanofibers and high photocatalytic efficiency in generating hydrogen from ethanol-water mixtures under UV-A and UV-B irradiation. Titanate nanofibers synthesized by hydrothermal method are annealed in air and/or ammonia to achieve N-doped anatase fibers. Depending on the synthesis route, either interstitial N atoms or new N-Ti bonds appear in the lattice, resulting in slight lattice expansion as shown by XPS and HR-TEM analysis, respectively. These nanofibers were then used as support for Pd and Pt nanoparticles deposited with wet impregnation followed by calcination and reduction. In the hydrogen generation tests, the N-doped samples were clearly outperforming their undoped counterparts, showing remarkable efficiency not only under UV-B but also with UV-A illumination. When 100 mg of catalyst (N-doped TiO₂ nanofiber decorated with Pt nanoparticles) was applied to 1 L of water-ethanol mixture, the H₂ evolution rates were as high as 700 μmol/h (UV-A) and 2250 μmol/h (UV-B) corresponding to photo energy conversion percentages of ∼3.6 and ∼12.3%, respectively.

Original language	English
Pages (from-to)	5025-5030
Number of pages	6
Journal	ACS Nano
Volume	5
Issue number	6
DOIs	https://doi.org/10.1021/nn201111j
State	Published - 28 06 2011
Externally published	Yes

Keywords

hydrogen production
nanowire
nitrogen-doped anatase
photocatalysis

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/nn201111j

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Wu, M. C., Hiltunen, J., Sápi, A., Avila, A., Larsson, W., Liao, H. C., Huuhtanen, M., Tóth, G., Shchukarev, A., Laufer, N., Kukovecz, Á., Kónya, Z., Mikkola, J. P., Keiski, R., Su, W. F., Chen, Y. F., Jantunen, H., Ajayan, P. M., Vajtai, R., & Kordás, K. (2011). Nitrogen-doped anatase nanofibers decorated with noble metal nanoparticles for photocatalytic production of hydrogen. ACS Nano, 5(6), 5025-5030. https://doi.org/10.1021/nn201111j

@article{8f9f7146cdb54a8fac0443eed0396ed3,

title = "Nitrogen-doped anatase nanofibers decorated with noble metal nanoparticles for photocatalytic production of hydrogen",

abstract = "We report the synthesis of N-doped TiO2 nanofibers and high photocatalytic efficiency in generating hydrogen from ethanol-water mixtures under UV-A and UV-B irradiation. Titanate nanofibers synthesized by hydrothermal method are annealed in air and/or ammonia to achieve N-doped anatase fibers. Depending on the synthesis route, either interstitial N atoms or new N-Ti bonds appear in the lattice, resulting in slight lattice expansion as shown by XPS and HR-TEM analysis, respectively. These nanofibers were then used as support for Pd and Pt nanoparticles deposited with wet impregnation followed by calcination and reduction. In the hydrogen generation tests, the N-doped samples were clearly outperforming their undoped counterparts, showing remarkable efficiency not only under UV-B but also with UV-A illumination. When 100 mg of catalyst (N-doped TiO2 nanofiber decorated with Pt nanoparticles) was applied to 1 L of water-ethanol mixture, the H2 evolution rates were as high as 700 μmol/h (UV-A) and 2250 μmol/h (UV-B) corresponding to photo energy conversion percentages of ∼3.6 and ∼12.3%, respectively.",

keywords = "hydrogen production, nanowire, nitrogen-doped anatase, photocatalysis",

author = "Wu, {Ming Chung} and Jussi Hiltunen and Andr{\'a}s S{\'a}pi and Anna Avila and William Larsson and Liao, {Hsueh Chung} and Mika Huuhtanen and G{\'e}za T{\'o}th and Andrey Shchukarev and No{\'e}mi Laufer and {\'A}kos Kukovecz and Zolt{\'a}n K{\'o}nya and Mikkola, {Jyri Pekka} and Riitta Keiski and Su, {Wei Fang} and Chen, {Yang Fang} and Heli Jantunen and Ajayan, {Pulickel M.} and Robert Vajtai and Kriszti{\'a}n Kord{\'a}s",

year = "2011",

month = jun,

day = "28",

doi = "10.1021/nn201111j",

language = "英语",

volume = "5",

pages = "5025--5030",

journal = "ACS Nano",

issn = "1936-0851",

publisher = "American Chemical Society",

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Wu, MC, Hiltunen, J, Sápi, A, Avila, A, Larsson, W, Liao, HC, Huuhtanen, M, Tóth, G, Shchukarev, A, Laufer, N, Kukovecz, Á, Kónya, Z, Mikkola, JP, Keiski, R, Su, WF, Chen, YF, Jantunen, H, Ajayan, PM, Vajtai, R & Kordás, K 2011, 'Nitrogen-doped anatase nanofibers decorated with noble metal nanoparticles for photocatalytic production of hydrogen', ACS Nano, vol. 5, no. 6, pp. 5025-5030. https://doi.org/10.1021/nn201111j

TY - JOUR

T1 - Nitrogen-doped anatase nanofibers decorated with noble metal nanoparticles for photocatalytic production of hydrogen

AU - Wu, Ming Chung

AU - Hiltunen, Jussi

AU - Sápi, András

AU - Avila, Anna

AU - Larsson, William

AU - Liao, Hsueh Chung

AU - Huuhtanen, Mika

AU - Tóth, Géza

AU - Shchukarev, Andrey

AU - Laufer, Noémi

AU - Kukovecz, Ákos

AU - Kónya, Zoltán

AU - Mikkola, Jyri Pekka

AU - Keiski, Riitta

AU - Su, Wei Fang

AU - Chen, Yang Fang

AU - Jantunen, Heli

AU - Ajayan, Pulickel M.

AU - Vajtai, Robert

AU - Kordás, Krisztián

PY - 2011/6/28

Y1 - 2011/6/28

N2 - We report the synthesis of N-doped TiO2 nanofibers and high photocatalytic efficiency in generating hydrogen from ethanol-water mixtures under UV-A and UV-B irradiation. Titanate nanofibers synthesized by hydrothermal method are annealed in air and/or ammonia to achieve N-doped anatase fibers. Depending on the synthesis route, either interstitial N atoms or new N-Ti bonds appear in the lattice, resulting in slight lattice expansion as shown by XPS and HR-TEM analysis, respectively. These nanofibers were then used as support for Pd and Pt nanoparticles deposited with wet impregnation followed by calcination and reduction. In the hydrogen generation tests, the N-doped samples were clearly outperforming their undoped counterparts, showing remarkable efficiency not only under UV-B but also with UV-A illumination. When 100 mg of catalyst (N-doped TiO2 nanofiber decorated with Pt nanoparticles) was applied to 1 L of water-ethanol mixture, the H2 evolution rates were as high as 700 μmol/h (UV-A) and 2250 μmol/h (UV-B) corresponding to photo energy conversion percentages of ∼3.6 and ∼12.3%, respectively.

AB - We report the synthesis of N-doped TiO2 nanofibers and high photocatalytic efficiency in generating hydrogen from ethanol-water mixtures under UV-A and UV-B irradiation. Titanate nanofibers synthesized by hydrothermal method are annealed in air and/or ammonia to achieve N-doped anatase fibers. Depending on the synthesis route, either interstitial N atoms or new N-Ti bonds appear in the lattice, resulting in slight lattice expansion as shown by XPS and HR-TEM analysis, respectively. These nanofibers were then used as support for Pd and Pt nanoparticles deposited with wet impregnation followed by calcination and reduction. In the hydrogen generation tests, the N-doped samples were clearly outperforming their undoped counterparts, showing remarkable efficiency not only under UV-B but also with UV-A illumination. When 100 mg of catalyst (N-doped TiO2 nanofiber decorated with Pt nanoparticles) was applied to 1 L of water-ethanol mixture, the H2 evolution rates were as high as 700 μmol/h (UV-A) and 2250 μmol/h (UV-B) corresponding to photo energy conversion percentages of ∼3.6 and ∼12.3%, respectively.

KW - hydrogen production

KW - nanowire

KW - nitrogen-doped anatase

KW - photocatalysis

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U2 - 10.1021/nn201111j

DO - 10.1021/nn201111j

M3 - 文章

C2 - 21568315

AN - SCOPUS:79959793399

SN - 1936-0851

VL - 5

SP - 5025

EP - 5030

JO - ACS Nano

JF - ACS Nano

IS - 6

ER -

Nitrogen-doped anatase nanofibers decorated with noble metal nanoparticles for photocatalytic production of hydrogen

Abstract

Keywords

UN SDGs

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