Hierarchical ZnO/SnO2 heterostructures via hydrothermally assisted electrospinning technique: synthesis and photocatalytic performances
Authors
Vojisavljević, KatarinaVukašinović, Jelena

Počuča-Nešić, Milica
Savic, Slavica
Podlogar, Matejka
Zemljak, Olivera
Branković, Zorica

Conference object (Published version)

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Hierarchical nanostructures with multiporous tin oxide nanofibers (SnO2-
MPNFs) and zinc oxide nanorods (ZnO-NRs) have been synthesized by combining
electrospinning technique and hydrothermal method. A solution containing
uniformly distributed tin (Sn) and silicon (Si) species of precursors, as well as a
sacrificial polymer (PVP) was electrospun using a single-nozzle spinneret to
fabricate nanofibers. In virtue of the Kirkendall effect driven by calcination at
550 °C, the SiO2-cored SnO2 nanofibers (SnO2-SiO2-NFs) deliberated from PVP
were formed and used as backbones for further hydrothermal growth of ZnO-NRs.
By varying the hydrothermal reaction time (0.5–2 h) at the constant concentration of
SnO2-SiO2-NFs, zinc (Zn) precursor, directing agent (hexamethylenetetramine,
HMT) and aqueous ammonia, the density, length and thickness of ZnO-NRs were
controlled. Nanofibers and ZnO-NRs/SnO2-MPNFs heterostructures are confirmed
by X-ray diffraction (XRD), field-emission scanning el...ectron microcopy (FE-SEM),
energy dispersive spectrometer (EDS), transmission electron microscopy (TEM) and
elemental mapping analysis.
The hydrothermal treatment conducted at 90 °C in aqueous ammonia allowed:
a) selective etching of SiO2 from the SnO2-SiO2-NFs core and SiO2 trapped between
SnO2 particles, and b) effective growth of ZnO-NRs. The process resulted in
ZnO-NRs/SnO2-MPNFs heterostructures with ZnO-NRs of 1–5 μm in length
attached to SnO2-MPNFs, the shell of which was composed of ultra-fine SnO2
crystallites (~5 nm in size) and where the four porous channels create the core
instead of SiO2. Photocatalytic performance of the heterostructures was investigated
toward different organic azo-dyes (methylene blue, methyl orange) and obvious
enhancement was demonstrated in degradation of the organic pollutant, compared to
primary SnO2-based nanofibers.
Keywords:
Electrospinning / Nanofibers / Hierarchical nanostructures / Photocatalytic activity / Organic azo-dyesSource:
6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia, 2022, 51-Publisher:
- University of Belgrade, Institute for Multidisciplinary Research
Funding / projects:
- Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200053 (University of Belgrade, Institute for Multidisciplinary Research) (RS-200053)
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Institution/Community
Institut za multidisciplinarna istraživanjaTY - CONF AU - Vojisavljević, Katarina AU - Vukašinović, Jelena AU - Počuča-Nešić, Milica AU - Savic, Slavica AU - Podlogar, Matejka AU - Zemljak, Olivera AU - Branković, Zorica PY - 2022 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/2038 AB - Hierarchical nanostructures with multiporous tin oxide nanofibers (SnO2- MPNFs) and zinc oxide nanorods (ZnO-NRs) have been synthesized by combining electrospinning technique and hydrothermal method. A solution containing uniformly distributed tin (Sn) and silicon (Si) species of precursors, as well as a sacrificial polymer (PVP) was electrospun using a single-nozzle spinneret to fabricate nanofibers. In virtue of the Kirkendall effect driven by calcination at 550 °C, the SiO2-cored SnO2 nanofibers (SnO2-SiO2-NFs) deliberated from PVP were formed and used as backbones for further hydrothermal growth of ZnO-NRs. By varying the hydrothermal reaction time (0.5–2 h) at the constant concentration of SnO2-SiO2-NFs, zinc (Zn) precursor, directing agent (hexamethylenetetramine, HMT) and aqueous ammonia, the density, length and thickness of ZnO-NRs were controlled. Nanofibers and ZnO-NRs/SnO2-MPNFs heterostructures are confirmed by X-ray diffraction (XRD), field-emission scanning electron microcopy (FE-SEM), energy dispersive spectrometer (EDS), transmission electron microscopy (TEM) and elemental mapping analysis. The hydrothermal treatment conducted at 90 °C in aqueous ammonia allowed: a) selective etching of SiO2 from the SnO2-SiO2-NFs core and SiO2 trapped between SnO2 particles, and b) effective growth of ZnO-NRs. The process resulted in ZnO-NRs/SnO2-MPNFs heterostructures with ZnO-NRs of 1–5 μm in length attached to SnO2-MPNFs, the shell of which was composed of ultra-fine SnO2 crystallites (~5 nm in size) and where the four porous channels create the core instead of SiO2. Photocatalytic performance of the heterostructures was investigated toward different organic azo-dyes (methylene blue, methyl orange) and obvious enhancement was demonstrated in degradation of the organic pollutant, compared to primary SnO2-based nanofibers. PB - University of Belgrade, Institute for Multidisciplinary Research C3 - 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia T1 - Hierarchical ZnO/SnO2 heterostructures via hydrothermally assisted electrospinning technique: synthesis and photocatalytic performances SP - 51 UR - https://hdl.handle.net/21.15107/rcub_rimsi_2038 ER -
@conference{ author = "Vojisavljević, Katarina and Vukašinović, Jelena and Počuča-Nešić, Milica and Savic, Slavica and Podlogar, Matejka and Zemljak, Olivera and Branković, Zorica", year = "2022", abstract = "Hierarchical nanostructures with multiporous tin oxide nanofibers (SnO2- MPNFs) and zinc oxide nanorods (ZnO-NRs) have been synthesized by combining electrospinning technique and hydrothermal method. A solution containing uniformly distributed tin (Sn) and silicon (Si) species of precursors, as well as a sacrificial polymer (PVP) was electrospun using a single-nozzle spinneret to fabricate nanofibers. In virtue of the Kirkendall effect driven by calcination at 550 °C, the SiO2-cored SnO2 nanofibers (SnO2-SiO2-NFs) deliberated from PVP were formed and used as backbones for further hydrothermal growth of ZnO-NRs. By varying the hydrothermal reaction time (0.5–2 h) at the constant concentration of SnO2-SiO2-NFs, zinc (Zn) precursor, directing agent (hexamethylenetetramine, HMT) and aqueous ammonia, the density, length and thickness of ZnO-NRs were controlled. Nanofibers and ZnO-NRs/SnO2-MPNFs heterostructures are confirmed by X-ray diffraction (XRD), field-emission scanning electron microcopy (FE-SEM), energy dispersive spectrometer (EDS), transmission electron microscopy (TEM) and elemental mapping analysis. The hydrothermal treatment conducted at 90 °C in aqueous ammonia allowed: a) selective etching of SiO2 from the SnO2-SiO2-NFs core and SiO2 trapped between SnO2 particles, and b) effective growth of ZnO-NRs. The process resulted in ZnO-NRs/SnO2-MPNFs heterostructures with ZnO-NRs of 1–5 μm in length attached to SnO2-MPNFs, the shell of which was composed of ultra-fine SnO2 crystallites (~5 nm in size) and where the four porous channels create the core instead of SiO2. Photocatalytic performance of the heterostructures was investigated toward different organic azo-dyes (methylene blue, methyl orange) and obvious enhancement was demonstrated in degradation of the organic pollutant, compared to primary SnO2-based nanofibers.", publisher = "University of Belgrade, Institute for Multidisciplinary Research", journal = "6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia", title = "Hierarchical ZnO/SnO2 heterostructures via hydrothermally assisted electrospinning technique: synthesis and photocatalytic performances", pages = "51", url = "https://hdl.handle.net/21.15107/rcub_rimsi_2038" }
Vojisavljević, K., Vukašinović, J., Počuča-Nešić, M., Savic, S., Podlogar, M., Zemljak, O.,& Branković, Z.. (2022). Hierarchical ZnO/SnO2 heterostructures via hydrothermally assisted electrospinning technique: synthesis and photocatalytic performances. in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia University of Belgrade, Institute for Multidisciplinary Research., 51. https://hdl.handle.net/21.15107/rcub_rimsi_2038
Vojisavljević K, Vukašinović J, Počuča-Nešić M, Savic S, Podlogar M, Zemljak O, Branković Z. Hierarchical ZnO/SnO2 heterostructures via hydrothermally assisted electrospinning technique: synthesis and photocatalytic performances. in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia. 2022;:51. https://hdl.handle.net/21.15107/rcub_rimsi_2038 .
Vojisavljević, Katarina, Vukašinović, Jelena, Počuča-Nešić, Milica, Savic, Slavica, Podlogar, Matejka, Zemljak, Olivera, Branković, Zorica, "Hierarchical ZnO/SnO2 heterostructures via hydrothermally assisted electrospinning technique: synthesis and photocatalytic performances" in 6th Conference of the Serbian Society for Ceramic Materials, 6CSCS-2022, June 28-29, 2022, Belgrade, Serbia (2022):51, https://hdl.handle.net/21.15107/rcub_rimsi_2038 .