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Liao SY, Yang YC, Huang SH, et al. Synthesis of Pt@TiO2@CNTs Hierarchical Structure Catalyst by Atomic Layer Deposition and Their Photocatalytic and Photoelectrochemical Activity. Nanomaterials (Basel). 2017;7(5)doi: 10.3390/nano7050097.
Liao, S. Y., Yang, Y. C., Huang, S. H., & Gan, J. Y. (2017). Synthesis of Pt@TiO2@CNTs Hierarchical Structure Catalyst by Atomic Layer Deposition and Their Photocatalytic and Photoelectrochemical Activity. Nanomaterials (Basel, Switzerland), 7(5), . https://doi.org/10.3390/nano7050097
Liao, Shih-Yun, et al. "Synthesis of Pt@TiO2@CNTs Hierarchical Structure Catalyst by Atomic Layer Deposition and Their Photocatalytic and Photoelectrochemical Activity." Nanomaterials (Basel, Switzerland) vol. 7,5 (2017). doi: https://doi.org/10.3390/nano7050097
Liao SY, Yang YC, Huang SH, Gan JY. Synthesis of Pt@TiO2@CNTs Hierarchical Structure Catalyst by Atomic Layer Deposition and Their Photocatalytic and Photoelectrochemical Activity. Nanomaterials (Basel). 2017 Apr 29;7(5). doi: 10.3390/nano7050097. PMID: 28468248; PMCID: PMC5449978.
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Nanomaterials (Basel). 2017 Apr 29;7(5). doi: 10.3390/nano7050097.

Synthesis of Pt@TiO2@CNTs Hierarchical Structure Catalyst by Atomic Layer Deposition and Their Photocatalytic and Photoelectrochemical Activity.

Nanomaterials (Basel, Switzerland)

Shih-Yun Liao, Ya-Chu Yang, Sheng-Hsin Huang, Jon-Yiew Gan

Affiliations

  1. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300, Taiwan. [email protected].
  2. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300, Taiwan. [email protected].
  3. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300, Taiwan. [email protected].
  4. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300, Taiwan. [email protected].

PMID: 28468248 PMCID: PMC5449978 DOI: 10.3390/nano7050097

Abstract

Pt@TiO2@CNTs hierarchical structures were prepared by first functionalizing carbon nanotubes (CNTs) with nitric acid at 140 °C. Coating of TiO2 particles on the CNTs at 300 °C was then conducted by atomic layer deposition (ALD). After the TiO2@CNTs structure was fabricated, Pt particles were deposited on the TiO2 surface as co-catalyst by plasma-enhanced ALD. The saturated deposition rates of TiO2 on a-CNTs were 1.5 Å/cycle and 0.4 Å/cycle for substrate-enhanced process and linear process, respectively. The saturated deposition rate of Pt on TiO2 was 0.39 Å/cycle. The photocatalytic activities of Pt@TiO2@CNTs hierarchical structures were higher than those without Pt co-catalyst. The particle size of Pt on TiO2@CNTs was a key factor to determine the efficiency of methylene blue (MB) degradation. The Pt@TiO2@CNTs of 2.41 ± 0.27 nm exhibited the best efficiency of MB degradation.

Keywords: ALD; CNT; TiO2; co-catalyst; photodegradation

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