SnO2/TiO2 nanotube heterojunction: The first investigation of NO degradation by visible light-driven photocatalysis

Tran Hong Huy, Dai Phat Bui, Fei Kang, Ya Fen Wang, Shou-Heng Liu, Cao Minh Thi, Sheng Jie You, Gen Mu Chang, Van Viet Pham

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Titania (TiO2) as a commercial photocatalyst has been continually struggling due to the limitation of ultraviolet light response and the high recombination rate of photoinduced carriers. The development of heterojunction nanostructures provides great promise to achieve the activation by visible light and suppress the photoinduced electron-hole pairs recombination. Herein, we synthesized a SnO2 and TiO2 nanotube heterojunction (SnO2/TNT) via a one-step hydrothermal strategy and systematically investigated NO photocatalytic degradation over the SnO2/TNTs heterojunction under visible light at the parts per billion level. Various physicochemical characterization techniques were conducted to verify the physical and chemical properties of the materials. For example, the morphology and lattice spacings of the materials were examined by high-resolution TEM (HR-TEM) images and selected area electron diffraction (SAED) pattern, X-ray photoelectron spectroscopy (XPS) was employed to study the oxidation states and propose the band alignment diagram of the SnO2/TNTs heterojunction, and photoluminescence spectroscopy was employed for understanding of carrier's trapping, migration and transfer. The photocatalytic results show that the SnO2/TNTs heterojunction exhibits the superior photocatalytic performance, and the photocatalytic degradation efficiency of NO can reach 60% under visible light with effective inhibition of NO2 production. The excellent photocatalytic ability is due to the low recombination rate of the photoinduced electron–hole pairs. Furthermore, a trapping experiment was combined with electron spin resonance (ESR) and utilized to identify the involvement of reactive radicals in the photocatalysis process suggesting that [Figure presented] and [rad]OH mediated pathways play a predominant role in NO removal.

Original languageEnglish
Pages (from-to)323-332
Number of pages10
JournalChemosphere
Volume215
DOIs
Publication statusPublished - 2019 Jan 1

Fingerprint

Trinitrotoluene
Nanotubes
Photocatalysis
Genetic Recombination
Heterojunctions
recombination
Light
Degradation
degradation
Electrons
trapping
Photoelectron Spectroscopy
Nanostructures
Electron Spin Resonance Spectroscopy
Ultraviolet Rays
electron
Spectrum Analysis
electron spin resonance
Photoluminescence spectroscopy
diffraction

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Huy, Tran Hong ; Bui, Dai Phat ; Kang, Fei ; Wang, Ya Fen ; Liu, Shou-Heng ; Thi, Cao Minh ; You, Sheng Jie ; Chang, Gen Mu ; Pham, Van Viet. / SnO2/TiO2 nanotube heterojunction : The first investigation of NO degradation by visible light-driven photocatalysis. In: Chemosphere. 2019 ; Vol. 215. pp. 323-332.
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abstract = "Titania (TiO2) as a commercial photocatalyst has been continually struggling due to the limitation of ultraviolet light response and the high recombination rate of photoinduced carriers. The development of heterojunction nanostructures provides great promise to achieve the activation by visible light and suppress the photoinduced electron-hole pairs recombination. Herein, we synthesized a SnO2 and TiO2 nanotube heterojunction (SnO2/TNT) via a one-step hydrothermal strategy and systematically investigated NO photocatalytic degradation over the SnO2/TNTs heterojunction under visible light at the parts per billion level. Various physicochemical characterization techniques were conducted to verify the physical and chemical properties of the materials. For example, the morphology and lattice spacings of the materials were examined by high-resolution TEM (HR-TEM) images and selected area electron diffraction (SAED) pattern, X-ray photoelectron spectroscopy (XPS) was employed to study the oxidation states and propose the band alignment diagram of the SnO2/TNTs heterojunction, and photoluminescence spectroscopy was employed for understanding of carrier's trapping, migration and transfer. The photocatalytic results show that the SnO2/TNTs heterojunction exhibits the superior photocatalytic performance, and the photocatalytic degradation efficiency of NO can reach 60{\%} under visible light with effective inhibition of NO2 production. The excellent photocatalytic ability is due to the low recombination rate of the photoinduced electron–hole pairs. Furthermore, a trapping experiment was combined with electron spin resonance (ESR) and utilized to identify the involvement of reactive radicals in the photocatalysis process suggesting that [Figure presented] and [rad]OH mediated pathways play a predominant role in NO removal.",
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SnO2/TiO2 nanotube heterojunction : The first investigation of NO degradation by visible light-driven photocatalysis. / Huy, Tran Hong; Bui, Dai Phat; Kang, Fei; Wang, Ya Fen; Liu, Shou-Heng; Thi, Cao Minh; You, Sheng Jie; Chang, Gen Mu; Pham, Van Viet.

In: Chemosphere, Vol. 215, 01.01.2019, p. 323-332.

Research output: Contribution to journalArticle

TY - JOUR

T1 - SnO2/TiO2 nanotube heterojunction

T2 - The first investigation of NO degradation by visible light-driven photocatalysis

AU - Huy, Tran Hong

AU - Bui, Dai Phat

AU - Kang, Fei

AU - Wang, Ya Fen

AU - Liu, Shou-Heng

AU - Thi, Cao Minh

AU - You, Sheng Jie

AU - Chang, Gen Mu

AU - Pham, Van Viet

PY - 2019/1/1

Y1 - 2019/1/1

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AB - Titania (TiO2) as a commercial photocatalyst has been continually struggling due to the limitation of ultraviolet light response and the high recombination rate of photoinduced carriers. The development of heterojunction nanostructures provides great promise to achieve the activation by visible light and suppress the photoinduced electron-hole pairs recombination. Herein, we synthesized a SnO2 and TiO2 nanotube heterojunction (SnO2/TNT) via a one-step hydrothermal strategy and systematically investigated NO photocatalytic degradation over the SnO2/TNTs heterojunction under visible light at the parts per billion level. Various physicochemical characterization techniques were conducted to verify the physical and chemical properties of the materials. For example, the morphology and lattice spacings of the materials were examined by high-resolution TEM (HR-TEM) images and selected area electron diffraction (SAED) pattern, X-ray photoelectron spectroscopy (XPS) was employed to study the oxidation states and propose the band alignment diagram of the SnO2/TNTs heterojunction, and photoluminescence spectroscopy was employed for understanding of carrier's trapping, migration and transfer. The photocatalytic results show that the SnO2/TNTs heterojunction exhibits the superior photocatalytic performance, and the photocatalytic degradation efficiency of NO can reach 60% under visible light with effective inhibition of NO2 production. The excellent photocatalytic ability is due to the low recombination rate of the photoinduced electron–hole pairs. Furthermore, a trapping experiment was combined with electron spin resonance (ESR) and utilized to identify the involvement of reactive radicals in the photocatalysis process suggesting that [Figure presented] and [rad]OH mediated pathways play a predominant role in NO removal.

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