Green approach for hierarchical nanostructured Ag-ZnO and their photocatalytic performance under sunlight

Santosh S. Patil, Mukund G. Mali, Mohaseen S. Tamboli, Deepak R. Patil, Milind V. Kulkarni, Hyun Yoon, Hayong Kim, Salem S. Al-Deyab, Suk Goo Yoon, Sanjay S. Kolekar, Bharat B. Kale

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

In this study, the synthesis of silver-zinc oxide (Ag-ZnO) nanostructures with a plant-extract-mediated hydrothermal method was investigated. The eco-friendly plant extract Azadirachta indica (Neem) was used as a reducing agent. The X-ray diffraction patterns showed the formation of face-centered cubic (fcc) Ag nanoparticles (NPs) and a wurtzite ZnO structure. An optical study of these nanostructures revealed two absorption edges: one at 393 nm corresponding to ZnO and the other at approximately 440 nm corresponding to Ag. A morphology study showed that hierarchical ZnO nanostructures were decorated with 10-50-nm-diameter Ag NPs. The formation and growth mechanism were also examined. A photoelectrochemical study was performed to investigate the electronic interactions between the ZnO and Ag NPs in the photoanode upon exposure to light. The Ag NPs act as electron acceptors, inhibiting electron-hole recombination. The photocatalytic activity of the Ag-ZnO nanostructures was examined by observing the degradation of aqueous methylene blue (MB) dye under natural sunlight. The apparent rate constant determined for the photocatalytic degradation of MB by the Ag-ZnO nanostructures was 5.9668 × 10-2 min-1, which was faster than that of the untreated ZnO nanostructures (2.527 × 10-2 min-1). This plant-extract-mediated synthetic route could also be applied to the synthesis of other Ag-semiconductor oxide nanostructures.

Original languageEnglish
Pages (from-to)126-134
Number of pages9
JournalCatalysis Today
Volume260
DOIs
Publication statusPublished - 2016 Feb 1

Fingerprint

Nanostructures
Plant extracts
Plant Extracts
Nanoparticles
Methylene Blue
Zinc Oxide
Degradation
Electrons
Reducing Agents
Reducing agents
Zinc oxide
Silver
Diffraction patterns
Rate constants
Coloring Agents
Dyes
X ray diffraction

Keywords

  • Ag nanoparticles
  • Ag-ZnO nanostructures
  • Azadirachta indica (Neem)
  • Hydrothermal

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Cite this

Patil, S. S., Mali, M. G., Tamboli, M. S., Patil, D. R., Kulkarni, M. V., Yoon, H., ... Kale, B. B. (2016). Green approach for hierarchical nanostructured Ag-ZnO and their photocatalytic performance under sunlight. Catalysis Today, 260, 126-134. https://doi.org/10.1016/j.cattod.2015.06.004

Green approach for hierarchical nanostructured Ag-ZnO and their photocatalytic performance under sunlight. / Patil, Santosh S.; Mali, Mukund G.; Tamboli, Mohaseen S.; Patil, Deepak R.; Kulkarni, Milind V.; Yoon, Hyun; Kim, Hayong; Al-Deyab, Salem S.; Yoon, Suk Goo; Kolekar, Sanjay S.; Kale, Bharat B.

In: Catalysis Today, Vol. 260, 01.02.2016, p. 126-134.

Research output: Contribution to journalArticle

Patil, SS, Mali, MG, Tamboli, MS, Patil, DR, Kulkarni, MV, Yoon, H, Kim, H, Al-Deyab, SS, Yoon, SG, Kolekar, SS & Kale, BB 2016, 'Green approach for hierarchical nanostructured Ag-ZnO and their photocatalytic performance under sunlight', Catalysis Today, vol. 260, pp. 126-134. https://doi.org/10.1016/j.cattod.2015.06.004
Patil, Santosh S. ; Mali, Mukund G. ; Tamboli, Mohaseen S. ; Patil, Deepak R. ; Kulkarni, Milind V. ; Yoon, Hyun ; Kim, Hayong ; Al-Deyab, Salem S. ; Yoon, Suk Goo ; Kolekar, Sanjay S. ; Kale, Bharat B. / Green approach for hierarchical nanostructured Ag-ZnO and their photocatalytic performance under sunlight. In: Catalysis Today. 2016 ; Vol. 260. pp. 126-134.
@article{e6fc7bac58ff4b6fbbfc357a929babd1,
title = "Green approach for hierarchical nanostructured Ag-ZnO and their photocatalytic performance under sunlight",
abstract = "In this study, the synthesis of silver-zinc oxide (Ag-ZnO) nanostructures with a plant-extract-mediated hydrothermal method was investigated. The eco-friendly plant extract Azadirachta indica (Neem) was used as a reducing agent. The X-ray diffraction patterns showed the formation of face-centered cubic (fcc) Ag nanoparticles (NPs) and a wurtzite ZnO structure. An optical study of these nanostructures revealed two absorption edges: one at 393 nm corresponding to ZnO and the other at approximately 440 nm corresponding to Ag. A morphology study showed that hierarchical ZnO nanostructures were decorated with 10-50-nm-diameter Ag NPs. The formation and growth mechanism were also examined. A photoelectrochemical study was performed to investigate the electronic interactions between the ZnO and Ag NPs in the photoanode upon exposure to light. The Ag NPs act as electron acceptors, inhibiting electron-hole recombination. The photocatalytic activity of the Ag-ZnO nanostructures was examined by observing the degradation of aqueous methylene blue (MB) dye under natural sunlight. The apparent rate constant determined for the photocatalytic degradation of MB by the Ag-ZnO nanostructures was 5.9668 × 10-2 min-1, which was faster than that of the untreated ZnO nanostructures (2.527 × 10-2 min-1). This plant-extract-mediated synthetic route could also be applied to the synthesis of other Ag-semiconductor oxide nanostructures.",
keywords = "Ag nanoparticles, Ag-ZnO nanostructures, Azadirachta indica (Neem), Hydrothermal",
author = "Patil, {Santosh S.} and Mali, {Mukund G.} and Tamboli, {Mohaseen S.} and Patil, {Deepak R.} and Kulkarni, {Milind V.} and Hyun Yoon and Hayong Kim and Al-Deyab, {Salem S.} and Yoon, {Suk Goo} and Kolekar, {Sanjay S.} and Kale, {Bharat B.}",
year = "2016",
month = "2",
day = "1",
doi = "10.1016/j.cattod.2015.06.004",
language = "English",
volume = "260",
pages = "126--134",
journal = "Catalysis Today",
issn = "0920-5861",
publisher = "Elsevier",

}

TY - JOUR

T1 - Green approach for hierarchical nanostructured Ag-ZnO and their photocatalytic performance under sunlight

AU - Patil, Santosh S.

AU - Mali, Mukund G.

AU - Tamboli, Mohaseen S.

AU - Patil, Deepak R.

AU - Kulkarni, Milind V.

AU - Yoon, Hyun

AU - Kim, Hayong

AU - Al-Deyab, Salem S.

AU - Yoon, Suk Goo

AU - Kolekar, Sanjay S.

AU - Kale, Bharat B.

PY - 2016/2/1

Y1 - 2016/2/1

N2 - In this study, the synthesis of silver-zinc oxide (Ag-ZnO) nanostructures with a plant-extract-mediated hydrothermal method was investigated. The eco-friendly plant extract Azadirachta indica (Neem) was used as a reducing agent. The X-ray diffraction patterns showed the formation of face-centered cubic (fcc) Ag nanoparticles (NPs) and a wurtzite ZnO structure. An optical study of these nanostructures revealed two absorption edges: one at 393 nm corresponding to ZnO and the other at approximately 440 nm corresponding to Ag. A morphology study showed that hierarchical ZnO nanostructures were decorated with 10-50-nm-diameter Ag NPs. The formation and growth mechanism were also examined. A photoelectrochemical study was performed to investigate the electronic interactions between the ZnO and Ag NPs in the photoanode upon exposure to light. The Ag NPs act as electron acceptors, inhibiting electron-hole recombination. The photocatalytic activity of the Ag-ZnO nanostructures was examined by observing the degradation of aqueous methylene blue (MB) dye under natural sunlight. The apparent rate constant determined for the photocatalytic degradation of MB by the Ag-ZnO nanostructures was 5.9668 × 10-2 min-1, which was faster than that of the untreated ZnO nanostructures (2.527 × 10-2 min-1). This plant-extract-mediated synthetic route could also be applied to the synthesis of other Ag-semiconductor oxide nanostructures.

AB - In this study, the synthesis of silver-zinc oxide (Ag-ZnO) nanostructures with a plant-extract-mediated hydrothermal method was investigated. The eco-friendly plant extract Azadirachta indica (Neem) was used as a reducing agent. The X-ray diffraction patterns showed the formation of face-centered cubic (fcc) Ag nanoparticles (NPs) and a wurtzite ZnO structure. An optical study of these nanostructures revealed two absorption edges: one at 393 nm corresponding to ZnO and the other at approximately 440 nm corresponding to Ag. A morphology study showed that hierarchical ZnO nanostructures were decorated with 10-50-nm-diameter Ag NPs. The formation and growth mechanism were also examined. A photoelectrochemical study was performed to investigate the electronic interactions between the ZnO and Ag NPs in the photoanode upon exposure to light. The Ag NPs act as electron acceptors, inhibiting electron-hole recombination. The photocatalytic activity of the Ag-ZnO nanostructures was examined by observing the degradation of aqueous methylene blue (MB) dye under natural sunlight. The apparent rate constant determined for the photocatalytic degradation of MB by the Ag-ZnO nanostructures was 5.9668 × 10-2 min-1, which was faster than that of the untreated ZnO nanostructures (2.527 × 10-2 min-1). This plant-extract-mediated synthetic route could also be applied to the synthesis of other Ag-semiconductor oxide nanostructures.

KW - Ag nanoparticles

KW - Ag-ZnO nanostructures

KW - Azadirachta indica (Neem)

KW - Hydrothermal

UR - http://www.scopus.com/inward/record.url?scp=84947870464&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84947870464&partnerID=8YFLogxK

U2 - 10.1016/j.cattod.2015.06.004

DO - 10.1016/j.cattod.2015.06.004

M3 - Article

AN - SCOPUS:84947870464

VL - 260

SP - 126

EP - 134

JO - Catalysis Today

JF - Catalysis Today

SN - 0920-5861

ER -