Preparation of Ag₃PO₄tetrapods anchored to nitrogen-doped carbon quantum dots for enhanced photocatalytic performance

Abstract

S-scheme charge transfer mechanism of NCQD(0.75%)/Ag3PO4 composite before contact and under visible-light radiation.

Ag/AgX (X = Cl, Br, or I) Nanocomposite Loaded on Ag3PO4 Tetrapods as a Photocatalyst for the Degradation of Contaminants

“…As shown in Figure a,b pattern and Figure S7, Ag 3 PO 4 AgCl, AgBr, and AgI are both n-type semiconductors for they have positive slopes of the M–S curve. The Fermi level ( E F ) is close to the flat band potential, which is estimated by the intersection of the tangent line of the M–S curve with the X -axis . The E F values of APO, AC, AB, and AI are 0.24, −0.41, −0.38, and 1.15 eV, respectively.…”

“…Ag 3 PO 4 was synthesized by the hydrothermal method. 6 At first, AgNO 3 (1.25 mmol) was dissolved in 80 mL of deionized water. Then, urea (18 mmol) was put into the aforesaid solution.…”

“…Ag 3 PO 4 was synthesized by the hydrothermal method . At first, AgNO 3 (1.25 mmol) was dissolved in 80 mL of deionized water.…”

“…In our previous work, Ag 3 PO 4 tetrapods exposed with highly reactive {110} facets were synthesized by hydrothermal method, efficiently improving the photocatalytic activity. 6 However, pure Ag 3 PO 4 makes it difficult to generate the reactive species of the superoxide radical ( • O 2 − ) due to its inherent limit of conduction band potential and, more importantly, easily reduced to metallic silver in an aqueous solution because of the photocorrosion.…”

“…Deonikar et al prepared Ag 3 PO 4 with various morphologies (such as rhombohedron, trioctahedron, and tetrapods) and proved that the morphological transformation of Ag 3 PO 4 took an active role in promoting their photocatalytic performance. In our previous work, Ag 3 PO 4 tetrapods exposed with highly reactive {110} facets were synthesized by hydrothermal method, efficiently improving the photocatalytic activity . However, pure Ag 3 PO 4 makes it difficult to generate the reactive species of the superoxide radical ( • O 2 – ) due to its inherent limit of conduction band potential and, more importantly, easily reduced to metallic silver in an aqueous solution because of the photocorrosion.…”