Effect of H2O2 Addition on the Photocatalyst Properties of Ag3PO4 for Methylene Blue Photodegradation

Abstract

In this work, a facile enhanced property of Ag3PO4 photocatalyst using H2O2 for methylene blue photodegradation has been conducted. Ag3PO4 photocatalyst was synthesized using the co-precipitation method. Then, the photocatalytic activity and stability of Ag3PO4 were tested in the methylene blue degradation under the addition of an H2O2 30% solution. According to the results, the prolonged photocatalysis reaction led to a decrease in the catalysis ability of the Ag3PO4 photocatalyst. Meanwhile, the addition of 5 mL of H2O2 (AH-10% sample) tends to enhance the stability of Ag3PO4 photocatalyst with the dye removal percentage and recycling test were up to 90.3% and three recycle runs, respectively. The low stability of Ag3PO4 might be due to the catalyst photo-corrosion through Ag+ reduction. This research suggests that H2O2 is beneficial to inhibit the photo-corrosion of Ag3PO4 photocatalyst, even though released Ag ions that were caused by the excess addition of H2O2 oxidizing agent should be considered.

INVESTIGATING THE EFFECT OF HYDROGEN PEROXIDE ON PHOTOCATALYTIC DEGRADATION OF COMMERCIAL PARACETAMOL USING TiO2

“…Among those semiconductor materials, Titanium dioxide (TiO 2 ) is selected as a catalyst because of stabilization in aqueous media, effectively employed in the abatement of aqueous pollution, high performance, stable towards photo-corrosion, biologically and chemically inert, nontoxic, and low cost [15]. Combination of Advanced Oxidation Processes (AOPs) was proved increases pollutants degradation such as solar/Ag-g-C 3 N 4 /O 3 process [16], visible/C,N-codoped TiO 2 /O 3 [17], UV/TiO 2 coated Zeolite/ H 2 O 2 [18], sonophotocatalysis in presence of Fe-doped TiO 2 and H 2 O 2 [19], Periodate/UV/US [20], and Visible/Ag 3 PO 4 /H 2 O 2 [21]. It is reported effective because the process has more oxidative species for organic pollutants degradation.…”