Fabrication of a Ag/Bi₃TaO₇ Plasmonic Photocatalyst with Enhanced Photocatalytic Activity for Degradation of Tetracycline

Abstract

A novel Ag/Bi3TaO7 plasmonic photocatalyst has been prepared by a simple photoreduction process. The as-prepared Ag/Bi3TaO7 photocatalyst exhibited an enhanced photocatalytic activity for the degradation of tetracycline (TC) compared to that of a bare Bi3TaO7 catalyst. The 1 wt % Ag-loaded Bi3TaO7 sample showed the highest photocatalytic efficiency for TC degradation (85.42%) compared with those of the other samples. The enhanced photocatalytic activity could be ascribed to the synergistic effect of the surface plasmon resonance caused by Ag nanoparticles. Electrochemical impedance spectroscopy demonstrated that the incorporation of silver nanoparticles onto the Bi3TaO7 surface promoted the separation of photogenerated carriers. In addition, an electron spin resonance (ESR) and trapping experiment revealed that the photoinduced active species hydroxyl radical and superoxide radical were the main active species in the photocatalytic process of TC degradation. The photocatalytic reaction mechanism was discussed by active species trapping and ESR analysis.

Fabrication of a ternary plasmonic photocatalyst CQDs/Ag/Ag2O to harness charge flow for photocatalytic elimination of pollutants

“…It can be seen from Fig. 1e that the lattice spacing of Ag particles is measured to be 0.205 nm, which according with the (200) crystal plane [14]. The different sample was characterized by XRD, and the sharp peaks (Fig.…”

“…Recently, plasmonic photocatalyst were designed to broaden optical applications and ameliorate the catalytic ability [10][11][12][13]. Several metal deposited photocatalysts have been reported, such as Ag@AgCl [14], Bi/BiOCl [15] and Cu/graphene/Cu2O [4]. These metal surface plasmon resonance (SPR) can not only absorb more solar light, but also enhancing the surface electron excitation and interfacial electron transfer.…”

Steering Charge Kinetics of Tin Niobate Photocatalysts: Key Roles of Phase Structure and Electronic Structure

“…5b. It is seen that there existed a linear relationship between the ln (C 0 /C) plot and the visible light irradiation time, suggesting a first-order kinetic reaction feature of methyl orange degradation [52]. And the SnNb 2 O 6 possessed the maximal degradation rate constant (0.112 ± 0.008 min − 1 ).…”

A novel strategy to promote photo-oxidative and reductive abilities via the construction of a bipolar Bi2WO6/N-SrTiO3 material

“…Radical-trapping experiments were performed to determine the active species in TC degradation by using different scavengers, including benzoquinone (BQ, superoxide anion O 2À radical scavenger), tert-butanol (TBA, cOH radical scavenger), silver nitrate (AgNO 3 , electron scavenger) and ammonium oxalate (AO, hole scavenger). 50 As shown in Fig. 10, TC photodegradation was greatly restrained in the presence of AO, compared with the reaction without radical scavengers.…”