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Superoxide (•O2−) radical species driven type II TiO2/g-C3N4 heterojunction photocatalyst for RhB dye degradation
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Superoxide (•O2−) radical species driven type II TiO2/g-C3N4 heterojunction photocatalyst for RhB dye degradation
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Journal Article
Superoxide (•O2−) radical species driven type II TiO2/g-C3N4 heterojunction photocatalyst for RhB dye degradation
2023
Overview
The photocatalysts possess prime importance from sustainable environment view point since they decompose detrimental substances. In this work, we report a type II heterojunction of titanium dioxide/graphitic carbon nitride (TiO
2
/g-C
3
N
4
) photocatalysts for degradation of rhodamine B (RhB) dye under UV–Visible light irradiation. The pristine TiO
2
and g-C
3
N
4
materials are prepared by hydrothermal and thermolysis methods, respectively. The heterojunction photocatalysts, i.e. TiO
2
/g-C
3
N
4
are synthesized with different weight% (wt%) loadings of TiO
2
over g-C
3
N
4
by hydrothermal method. The physico-chemical properties of all photocatalysts are analysed by different characterization techniques. Compared with the pristine phase of TiO
2
and g-C
3
N
4
, the heterojunction photocatalysts showed improved efficiency due to effective charge transfer between TiO
2
with g-C
3
N
4
and enhanced visible light harvesting. Owing to effective superlative light absorption and generation of the large number of electron–hole pairs, suppression of recombination centres, formation of active species (specially
•
O
2
−
), etc., 5 wt% loaded TiO
2
/g-C
3
N
4
photocatalyst demonstrated superior performance. Moreover, 5 wt% loaded TiO
2
/g-C
3
N
4
photocatalyst exhibited recyclability with high activity (92% after 4 cycles) and thus, we believe it possesses potential for use in industrial water treatment.
Publisher
Springer US,Springer Nature B.V
