Facile synthesis of heterostructured g-C3N4/Ag -TiO2 photocatalysts with enhanced visible-light photocatalytic performance

Authors

• Chonnipha Tangwongputti
• Prasert Reubroycharoen
• Pornapa Sujaridworakun

Publication Date

2022

Abstract

In this study, the g-C3N4/Ag-TiO2 composite photocatalysts were prepared to enhance the efficient utilization of solar energy. The g-C3N4 was synthesized by facile heat treatment of urea at 600℃ for 4 h, and 0.05 wt% to 3 wt% Ag-TiO2 were obtained through the chemical reduction method. The composite photocatalysts were prepared by mixing the g-C3N4 and Ag-TiO2 with a weight ratio of 50:50 at room temperature. The photocatalytic efficiency was carried out by using 0.05 g of photocatalysts with 10 mg·L-1 of rhodamine B 120 mL under 60 min of visible light irradiation. The experimental results indicated that a sample with 0.1 wt% Ag-TiO2 could degrade rhodamine B up to 21.21%. The g-C3N4/(0.1 wt% Ag-TiO2) and g-C3N4 showed rhodamine B degradation efficiency up to 100%, which was 10.4 times and 4.7 times of pure TiO2 and 0.1 wt% Ag-TiO2, respectively. It can be suggested that the Ag deposited on TiO2 played an important role in the absorption capability under the visible light through the surface plasmon resonance effect. In addition, heterojunction between g-C3N4 and TiO2 could reduce the recombination of electron-hole pairs.

DOI

10.55713/jmmm.v32i1.1246

First Page

48

Last Page

54

Recommended Citation

Tangwongputti, Chonnipha; Reubroycharoen, Prasert; and Sujaridworakun, Pornapa (2022) "Facile synthesis of heterostructured g-C3N4/Ag -TiO2 photocatalysts with enhanced visible-light photocatalytic performance," Journal of Metals, Materials and Minerals: Vol. 32: No. 1, Article 5.
DOI: 10.55713/jmmm.v32i1.1246
Available at: https://digital.car.chula.ac.th/jmmm/vol32/iss1/5