Sequential desilication-isomorphous substitution route to prepare mesostructured silica nanoparticles loaded with ZnO and their photocatalytic activity

N. W C Jusoh, A. A. Jalil, S. Triwahyono, H. D. Setiabudi, N. Sapawe, M. A H Satar, A. H. Karim, Kamarudin Nur Hidayatul Nazirah, R. Jusoh, N. F. Jaafar, N. Salamun, J. Efendi

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

A simple electrochemical method followed by impregnation was employed to prepare a coral-like zinc oxide catalyst loaded on mesostructured silica nanoparticles (ZnO/MSN). The introduction of zinc species onto a silica framework was found to form an interaction between the host and support material. XRD analysis suggested the presence of zinc on the internal pore walls of MSN. FE-SEM and TEM analyses displayed nanorods, nanoparticles and coral-like shapes of ZnO, MSN and ZnO/MSN, respectively. 29Si NMR and FTIR results showed that desilication occurred in the silica framework of the MSN accompanied by isomorphous substitution of Zn2+ cations to form an active species Zn-O-Si bond. The photocatalytic activity of the ZnO/MSN was tested by decolorizing methyl orange (MO). It was found that increasing the ZnO loading led to a higher recombination rate of photoinduced electron-hole pairs, which resulted in decreased photocatalytic activity. The highest decolorization rate was obtained using 1 g L-1 of 5 wt% ZnO/MSN with an optimum dosage of 3.06 × 10-2 mM MO after 8 h contact time at pH 2 under UV irradiation. A kinetic study demonstrated that the photocatalytic reaction followed the pseudo first-order model. The photocatalyst was still stable after five cycling runs with a small amount of Zn was leached (

Original languageEnglish
Pages (from-to)276-287
Number of pages12
JournalApplied Catalysis A: General
Volume468
DOIs
Publication statusPublished - 2013
Externally publishedYes

Fingerprint

Silicon Dioxide
Substitution reactions
Silica
Nanoparticles
Zinc
Zinc Oxide
Photocatalysts
Zinc oxide
Nanorods
Impregnation
Cations
Positive ions
Nuclear magnetic resonance
Irradiation
Transmission electron microscopy
Scanning electron microscopy
Catalysts
Kinetics
Electrons
methyl orange

Keywords

  • Desilication
  • Isomorphous substitution
  • Mesostructured silica nanoparticles
  • Photodecolorization
  • ZnO/MSN

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Sequential desilication-isomorphous substitution route to prepare mesostructured silica nanoparticles loaded with ZnO and their photocatalytic activity. / Jusoh, N. W C; Jalil, A. A.; Triwahyono, S.; Setiabudi, H. D.; Sapawe, N.; Satar, M. A H; Karim, A. H.; Nur Hidayatul Nazirah, Kamarudin; Jusoh, R.; Jaafar, N. F.; Salamun, N.; Efendi, J.

In: Applied Catalysis A: General, Vol. 468, 2013, p. 276-287.

Research output: Contribution to journalArticle

Jusoh, NWC, Jalil, AA, Triwahyono, S, Setiabudi, HD, Sapawe, N, Satar, MAH, Karim, AH, Nur Hidayatul Nazirah, K, Jusoh, R, Jaafar, NF, Salamun, N & Efendi, J 2013, 'Sequential desilication-isomorphous substitution route to prepare mesostructured silica nanoparticles loaded with ZnO and their photocatalytic activity', Applied Catalysis A: General, vol. 468, pp. 276-287. https://doi.org/10.1016/j.apcata.2013.09.005
Jusoh, N. W C ; Jalil, A. A. ; Triwahyono, S. ; Setiabudi, H. D. ; Sapawe, N. ; Satar, M. A H ; Karim, A. H. ; Nur Hidayatul Nazirah, Kamarudin ; Jusoh, R. ; Jaafar, N. F. ; Salamun, N. ; Efendi, J. / Sequential desilication-isomorphous substitution route to prepare mesostructured silica nanoparticles loaded with ZnO and their photocatalytic activity. In: Applied Catalysis A: General. 2013 ; Vol. 468. pp. 276-287.
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abstract = "A simple electrochemical method followed by impregnation was employed to prepare a coral-like zinc oxide catalyst loaded on mesostructured silica nanoparticles (ZnO/MSN). The introduction of zinc species onto a silica framework was found to form an interaction between the host and support material. XRD analysis suggested the presence of zinc on the internal pore walls of MSN. FE-SEM and TEM analyses displayed nanorods, nanoparticles and coral-like shapes of ZnO, MSN and ZnO/MSN, respectively. 29Si NMR and FTIR results showed that desilication occurred in the silica framework of the MSN accompanied by isomorphous substitution of Zn2+ cations to form an active species Zn-O-Si bond. The photocatalytic activity of the ZnO/MSN was tested by decolorizing methyl orange (MO). It was found that increasing the ZnO loading led to a higher recombination rate of photoinduced electron-hole pairs, which resulted in decreased photocatalytic activity. The highest decolorization rate was obtained using 1 g L-1 of 5 wt{\%} ZnO/MSN with an optimum dosage of 3.06 × 10-2 mM MO after 8 h contact time at pH 2 under UV irradiation. A kinetic study demonstrated that the photocatalytic reaction followed the pseudo first-order model. The photocatalyst was still stable after five cycling runs with a small amount of Zn was leached (",
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AU - Jalil, A. A.

AU - Triwahyono, S.

AU - Setiabudi, H. D.

AU - Sapawe, N.

AU - Satar, M. A H

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AU - Salamun, N.

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