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Microwave-assisted synthesis of layered basic zinc acetate nanosheets and their thermal decomposition into nanocrystalline ZnO

Afshin Tarat, Chris J Nettle, Daniel T J Bryant, Daniel R Jones, Mark W Penny, Richard A Brown, Ravish Majitha, Kenith E Meissner, Thierry Maffeis Orcid Logo

Nanoscale Research Letters, Volume: 9, Issue: 1, Start page: 11

Swansea University Author: Thierry Maffeis Orcid Logo

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DOI (Published version): 10.1186/1556-276X-9-11

Abstract

We have developed a low-cost technique using a conventional microwave oven to grow layered basic zinc acetate (LBZA) nanosheets (NSs) from a zinc acetate, zinc nitrate and HMTA solution in only 2 min. The as-grown crystals and their pyrolytic decomposition into ZnO nanocrystalline NSs are characteri...

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Published in: Nanoscale Research Letters
ISSN: 1556-276X
Published: 2014
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URI: https://cronfa.swan.ac.uk/Record/cronfa21131
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spelling 2019-03-29T16:31:11.9930518 v2 21131 2015-05-06 Microwave-assisted synthesis of layered basic zinc acetate nanosheets and their thermal decomposition into nanocrystalline ZnO 992eb4cb18b61c0cd3da6e0215ac787c 0000-0003-2357-0092 Thierry Maffeis Thierry Maffeis true false 2015-05-06 ACEM We have developed a low-cost technique using a conventional microwave oven to grow layered basic zinc acetate (LBZA) nanosheets (NSs) from a zinc acetate, zinc nitrate and HMTA solution in only 2 min. The as-grown crystals and their pyrolytic decomposition into ZnO nanocrystalline NSs are characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), atomic force microscopy (AFM), X-ray diffraction (XRD) and photoluminescence (PL). SEM and AFM measurements show that the LBZA NSs have typical lateral dimensions of 1 to 5 μm and thickness of 20 to 100 nm. Annealing in air from 200°C to 1,000°C results in the formation of ZnO nanocrystalline NSs, with a nanocrystallite size ranging from 16 nm at 200°C to 104 nm at 1,000°C, as determined by SEM. SEM shows evidence of sintering at 600°C. PL shows that the shape of the visible band is greatly affected by the annealing temperature and that the exciton band to defect band intensity ratio is maximum at 400°C and decreases by a factor of 15 after annealing at 600°C. The shape and thickness of the ZnO nanocrystalline NSs are the same as LBZA NSs. This structure provides a high surface-to-volume ratio of interconnected nanoparticles that is favorable for applications requiring high specific area and low resistivity such as gas sensing and dye-sensitized solar cells (DSCs). We show that resistive gas sensors fabricated with the ZnO NSs showed a response of 1.12 and 1.65 to 12.5 ppm and 200 ppm of CO at 350°C in dry air, respectively, and that DSCs also fabricated from the material had an overall efficiency of 1.3%. Journal Article Nanoscale Research Letters 9 1 11 1556-276X Gas sensor, LBZA, Nanocrystalline, Solar cell, ZnO 8 1 2014 2014-01-08 10.1186/1556-276X-9-11 © 2014 Tarat et al.; licensee Springer. This is an open access article distributed under the terms of the Creative CommonsAttribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproductionin any medium, provided the original work is properly cited. COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University 2019-03-29T16:31:11.9930518 2015-05-06T16:28:41.9785776 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering Afshin Tarat 1 Chris J Nettle 2 Daniel T J Bryant 3 Daniel R Jones 4 Mark W Penny 5 Richard A Brown 6 Ravish Majitha 7 Kenith E Meissner 8 Thierry Maffeis 0000-0003-2357-0092 9 0021131-06052015163920.pdf Tarat__2014__nanosheets__NRL.pdf 2015-05-06T16:39:20.4570000 Output 1902702 application/pdf Version of Record true 2015-05-06T00:00:00.0000000 false
title Microwave-assisted synthesis of layered basic zinc acetate nanosheets and their thermal decomposition into nanocrystalline ZnO
spellingShingle Microwave-assisted synthesis of layered basic zinc acetate nanosheets and their thermal decomposition into nanocrystalline ZnO
Thierry Maffeis
title_short Microwave-assisted synthesis of layered basic zinc acetate nanosheets and their thermal decomposition into nanocrystalline ZnO
title_full Microwave-assisted synthesis of layered basic zinc acetate nanosheets and their thermal decomposition into nanocrystalline ZnO
title_fullStr Microwave-assisted synthesis of layered basic zinc acetate nanosheets and their thermal decomposition into nanocrystalline ZnO
title_full_unstemmed Microwave-assisted synthesis of layered basic zinc acetate nanosheets and their thermal decomposition into nanocrystalline ZnO
title_sort Microwave-assisted synthesis of layered basic zinc acetate nanosheets and their thermal decomposition into nanocrystalline ZnO
author_id_str_mv 992eb4cb18b61c0cd3da6e0215ac787c
author_id_fullname_str_mv 992eb4cb18b61c0cd3da6e0215ac787c_***_Thierry Maffeis
author Thierry Maffeis
author2 Afshin Tarat
Chris J Nettle
Daniel T J Bryant
Daniel R Jones
Mark W Penny
Richard A Brown
Ravish Majitha
Kenith E Meissner
Thierry Maffeis
format Journal article
container_title Nanoscale Research Letters
container_volume 9
container_issue 1
container_start_page 11
publishDate 2014
institution Swansea University
issn 1556-276X
doi_str_mv 10.1186/1556-276X-9-11
college_str Faculty of Science and Engineering
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hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering
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description We have developed a low-cost technique using a conventional microwave oven to grow layered basic zinc acetate (LBZA) nanosheets (NSs) from a zinc acetate, zinc nitrate and HMTA solution in only 2 min. The as-grown crystals and their pyrolytic decomposition into ZnO nanocrystalline NSs are characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), atomic force microscopy (AFM), X-ray diffraction (XRD) and photoluminescence (PL). SEM and AFM measurements show that the LBZA NSs have typical lateral dimensions of 1 to 5 μm and thickness of 20 to 100 nm. Annealing in air from 200°C to 1,000°C results in the formation of ZnO nanocrystalline NSs, with a nanocrystallite size ranging from 16 nm at 200°C to 104 nm at 1,000°C, as determined by SEM. SEM shows evidence of sintering at 600°C. PL shows that the shape of the visible band is greatly affected by the annealing temperature and that the exciton band to defect band intensity ratio is maximum at 400°C and decreases by a factor of 15 after annealing at 600°C. The shape and thickness of the ZnO nanocrystalline NSs are the same as LBZA NSs. This structure provides a high surface-to-volume ratio of interconnected nanoparticles that is favorable for applications requiring high specific area and low resistivity such as gas sensing and dye-sensitized solar cells (DSCs). We show that resistive gas sensors fabricated with the ZnO NSs showed a response of 1.12 and 1.65 to 12.5 ppm and 200 ppm of CO at 350°C in dry air, respectively, and that DSCs also fabricated from the material had an overall efficiency of 1.3%.
published_date 2014-01-08T12:43:01Z
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score 11.048453

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