# The Role of H2C2O4 and Na2CO3 as Precipitating Agents on the Physichochemical Properties and Photocatalytic Activity of Bismuth Oxide
> Astuti Y.

URL kanonis: https://discover.unhas.ac.id/publications/pub_scopus_85082714346
Jurnal / Konferensi: Open Chemistry
Tahun terbit: 2020
DOI: https://doi.org/10.1515/chem-2020-0013
ISSN: 23915420
Kuartil SJR: Q3
Citations: 32

## Authors
- Astuti Y.

## Abstract
Abstract Synthesis of bismuth oxide synthesis through the precipitation method using H 2 C 2 O 4 and Na 2 CO 3 precipitating agents, identification of physicochemical properties and its photocatalysis activity for methyl orange degradation were conducted. The bismuth oxide synthesis was undertaken by dissolving Bi(NO 3 ) 3 .5H 2 O in HNO 3 , then added precipitating agents to form precipitate. The results showed that bismuth oxide produced by H 2 C 2 O 4 precipitating agent was a yellow powder containing a mixture of α-Bi 2 O 3 (monoclinic) and β-Bi 2 O 3 (tetragonal), porous with size of 28-85 μm. Meanwhile, the use of Na 2 CO 3 as precipitating agent resulted in bismuth oxide consisting of α-Bi 2 O 3 and β-Bi 2 O 3 and Bi 2 O 4 , irregular shape without pore being 40-115 μm in size. Bismuth oxide synthesized with H 2 C 2 O 4 precipitating agent showed higher photocatalytic activity compared to bismuth oxide synthesized using Na 2 CO 3 on degrading methyl orange dye with degradation rate constants of 2.35x10 -5 s -1 for H 2 C 2 O 4 and 1.81x10 -5 s -1 for Na 2 CO 3 .

## Keywords
- Bismuth
- Photocatalysis
- Methyl orange
- Oxide
- Monoclinic crystal system
- Dissolution
- Coprecipitation
- Precipitation
- Tetragonal crystal system
- Inorganic chemistry
- Nuclear chemistry
- Chemistry
- Materials science
- Crystal structure
- Organic chemistry
- Catalysis
- Meteorology
- Physics

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Sumber: Discover Unhas — RIMS Universitas Hasanuddin.
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