Synthesis of pure nano Cr2O3 from chromite ore by a novel method and investigation of its composites with bentonite for their photocatalytic properties
In the present study, nano Cr 2 O 3 was prepared with a novel method from chromite ore. In this method, K 2 Cr 2 O 7 was prepared by alkaline melting of chromite ore. Then, the precursor complex K 3 [Cr(C 2 O 4 ) 3 ] was prepared using potassium dichromate obtained from chromite ore and Merck Co. fo...
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| Published in: | Journal of the Iranian Chemical Society Vol. 20; no. 11; pp. 2805 - 2819 |
|---|---|
| Main Authors: | , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Berlin/Heidelberg
Springer Berlin Heidelberg
01.11.2023
Springer Nature B.V |
| Subjects: | |
| ISSN: | 1735-207X, 1735-2428 |
| Online Access: | Get full text |
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| Summary: | In the present study, nano Cr
2
O
3
was prepared with a novel method from chromite ore. In this method, K
2
Cr
2
O
7
was prepared by alkaline melting of chromite ore. Then, the precursor complex K
3
[Cr(C
2
O
4
)
3
] was prepared using potassium dichromate obtained from chromite ore and Merck Co. for comparing their purity. Therefore, two types of nano (Cr
2
O
3
)
M or ch
(M = Merck, ch = chromite ore) were prepared by destructing the gel contained K
3
[Cr(C
2
O
4
)
3
] and starch as an eco-friendly material for controlling the size and morphology of the nanoparticles. So, these nanoparticles were characterized by XRD, FESEM, and EDX. The ball-milled bentonite (B) was used for the preparation of (Cr
2
O
3
(n% = 30, 50, and 70%)/B)
ch
and (Cr
2
O
3
(n% = 30, 50%)/B)
M
nanocomposites. The XRD and FESEM of (Cr
2
O
3
(n%)/B)
ch
and (Cr
2
O
3
(n%)/B)
M
are the same. So, the (Cr
2
O
3
(n%)/B)
ch
nanocomposites were just used for further investigations, such as photocatalytic properties, and analysed by other techniques, including FTIR and DRS. The (Cr
2
O
3
(30%)/B)
ch
showed the highest degradation property, 69% after 240 min, among other prepared nanocomposites to destroy methylene blue with 10 ppm concentration at pH = 10 under UV irradiation. Also, the (Cr
2
O
3
(30%)/B)
ch
could degrade methyl orange with 10 ppm concentration at pH = 7 up to 74% after 240 min. Nano Cr
2
O
3
and bare bentonite efficiency for methylene blue and methyl orange degradation were lower (< 30%) under the same conditions. |
|---|---|
| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 |
| ISSN: | 1735-207X 1735-2428 |
| DOI: | 10.1007/s13738-023-02877-9 |