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Publication
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| Research Title |
NOVEL CUBIC HETEROJUNCTION Fe2O3/ZnO COMPOSITE FOR THE PHOTOCATALYST APPLICATION |
| Date of Distribution |
3 August 2022 |
| Conference |
| Title of the Conference |
International conference on advanced materials in environment, energy and health applications-AMEEHA 2022 |
| Organiser |
Department of Chemical Engineering, Khon Kaen University, Thailand and Department of Environmental Sciences, JSS Academy of Higher Education and Research, India. |
| Conference Place |
Pathumwan Princess Hotel |
| Province/State |
Bangkok, Thailand |
| Conference Date |
3 August 2022 |
| To |
5 August 2022 |
| Proceeding Paper |
| Volume |
2022 |
| Issue |
1 |
| Page |
13 |
| Editors/edition/publisher |
P. Hemnil, Y. Prapawasit, T. Wongwuttanasatian, V. Seithtanabutara |
| Abstract |
In recent years’ metal oxides based composite materials have been widely examined as photoelectrode for dyesensitized solar cells (DSSC) [1-2]. Among that zinc oxide (ZnO), ferric oxide (Fe2O3), titanium dioxide (TiO2), and
magnetite (Fe3O4) based photocatalysts are gained high attention owing to their non-toxic, environmentally friendly,
and higher energy conversion [1]. Comparatively, ZnO and Fe2O3 have higher band gap energy (3.37 eV and 2.1 eV)
equivalent to TiO2, efficient light absorption capability of the visible range, and degradation of Victoria blue dye .
under UV light [3]. On the other hand, it is chemically stable in aqueous substance, low cost, and abundant in nature
[4-5]. In this study, Fe2O3/ZnO is synthesized using Hydrothermal-calcination (HTC) and Hydrothermal method (HT)
to find the physicochemical structure and photo activity. For the HTC method, Fe2O3 is undergone for a conventional
hydrothermal reaction using Fe(NO3)3.9H2O, Na3C6H5O7, and urea as chemical substances and blended with pure
commercial ZnO. Following that calcination process at 400 °C for 1 hour to obtain the HTC- Fe2O3/ZnO samples.
For HT method, FeCl3, 6H2O, absolute ethanol, and NaAc are blended and heated at 190 °C for 24 hours. Following
that washing and drying process is performed to obtain the HT- Fe2O3/ZnO.
From XRD pattern, it is found that the phase and crystallography of ZnO are consistent with the existing study [1].
Figure 1 (a) depicts the hybrid structural relationship between Fe2O3 and ZnO with a peak intensity for HTCFe2O3/ZnO than HT- Fe2O3/ZnO. Following that FTIR spectra obtain a similar peak for HTC- Fe2O3/ZnO and HTFe2O3/ZnO which shares a functional group of Fe2O3 and ZnO as shown in Figure 1 (b). TGA depicts a weight loss
peak of -0.09 %wt./min and -0.34 %wt./min at 236°C and 634°C, respectively for HTC- Fe2O3/ZnO composition as
shown in Figure 1 (c). Advantageously, HT- Fe2O3/ZnO attained a single weight loss peak of -0.22 %wt./min at 514°C.
It reveals that HT- Fe2O3/ZnO is thermally stable than HTC- Fe2O3/ZnO composite at a temperature higher than
650°C. Fig 2(a) shows the UV-VIS absorbance spectra for the prepared samples, it is found that commercial nano
HTC-Fe2O3/ZnO composite attained isotherm type III and type IV while HT-Fe2O3/ZnO achieved only isotherm type
IV as shown in Figures 2 (b) and 2 (c). Higher specific surface area (34.855 m2
/g) and smaller pore size (8.543 nm)
are noted for HT-Fe2O3/ZnO than HTC-Fe2O3/ZnO. The inset image of Figure 2 (b) shows the ZnO particles spread
over the surface of HT-Fe2O3 and the inset image of Figure 2 (c) shows the cube-shaped Fe2O3 particles with a size
of around 50-70 nm covered by some traces of ZnO. It is found that HT-Fe2O3/ZnO composite achieved a higher
amount of Fe than HTC-Fe2O3/ZnO composite however Zn and O are less. It concludes that a novel cubic
heterojunction HT-Fe2O3/ZnO composite achieved a low energy band gap and high thermal stability. |
| Author |
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| Peer Review Status |
ไม่มีผู้ประเมินอิสระ |
| Level of Conference |
นานาชาติ |
| Type of Proceeding |
Abstract |
| Type of Presentation |
Oral |
| Part of thesis |
true |
| Presentation awarding |
false |
| Attach file |
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| Citation |
0
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Journal Publication
ไทย