Facile synthesis of Ag₃VO₄/β-AgVO₃ nanowires with efficient visible-light photocatalytic activity

Abstract

Ag 3 VO 4 /b-AgVO 3 nanocomposites were successfully fabricated by chemical precipitation and hydrothermal method. The composites displayed excellent photocatalytic activity in comparision with those of pure b-AgVO 3 and Ag 3 VO 4 , which may be primarily ascribed to the matched energy structures.The sample with a molar ratio of 30% Ag 3 VO 4 to b-AgVO 3 showed the highest photocatalytic activity for RhB degradation, which was almost 9 and 2.4 times higher than those of pure b-AgVO 3 and Ag 3 VO 4 , respectively. In addition, the trapping experiments also confirmed that holes and hydroxyl radicals are the active species for RhB degradation, and the possible mechanism for enhanced photocatalytic activity was proposed.

Synthesis of β-AgVO3 nanowires by hydrothermal and precipitation routes: a comparative study

“…Samples P1 and P2 exhibited diffractions peaks indexed to monoclinic β-AgVO 3 (JCPDS 29-1154), cubic silver oxide phases with chemical formula of Ag 2 O 3 (JCPDS 01-072-0607) and AgO (JCPDS 01-076-1489) and metallic silver (JCPDS 81-1740). Samples H1 and H2 showed diffractions peaks attributed to monoclinic β-AgVO 3 (JCPDS 29-1154) and metallic silver (JCPDS 81-1740) [6,20]. Therefore, the two peaks attributed to Ag was verified in all samples.…”

Enhancement of Rhodamine B Degradation by Ag Nanoclusters-Loaded g-C3N4 Nanosheets

“…The order of samples in which photocatalytic efficiency is increasing is g-C 3 N 4 , gCN/Ag 0.005 M, gCN/Ag 0.007 M, gCN/Ag 0.05 M, gCN/Ag 0.1 M, gCN/Ag 0.03 M, gCN/Ag 0.01 M, and gCN/Ag 0.01 M. Figure 6b exhibits the obvious change of RhB concentration in UV-vis absorption spectra of gCN/Ag 0.01 M heterojunction as a function of time. After 50 min exposure to Xenon lamp irradiation, the 554 nm absorption peak of RhB not only disappeared completely but also shifted from 554 nm to 530 nm, demonstrating the decomposition of conjugated structure of RhB [41]. This enhancement of photocatalytic activity in loaded samples can be adequately explained by the assumption that photogenerated electrons on g-C 3 N 4 nanosheets effectively transferred to Ag nanoclusters, which reduces the recombination rate of electrons and holes as evidenced by the obvious reduction in PL spectra.…”

The effective photocatalysis and antibacterial properties of AgBr/AgVO3 composites under visible-light

“…In order to realize the effective utilization of solar energy and reduce the harm of antimicrobial materials to the environment and human beings, it is of great signicance to develop and design green environment-friendly photocatalytic antimicrobial materials. In recent years, photocatalytic nanomaterials have become a research hotspot in the eld of antimicrobials [1][2][3][4][5][6][7][8] because of their good broad-spectrum antimicrobial properties, lack of secondary pollution and stability. Many studies have examined the antibacterial properties of photocatalysts on E. coli, 1,[3][4][5]8 S. aureus, 1,8 P. aeruginosa, 6 Lactobacillus 2 and Sulfate Reducing Bacteria.…”

“…In recent years, photocatalytic nanomaterials have become a research hotspot in the eld of antimicrobials [1][2][3][4][5][6][7][8] because of their good broad-spectrum antimicrobial properties, lack of secondary pollution and stability. Many studies have examined the antibacterial properties of photocatalysts on E. coli, 1,[3][4][5]8 S. aureus, 1,8 P. aeruginosa, 6 Lactobacillus 2 and Sulfate Reducing Bacteria. 2 Under light irradiation, the semiconductor will generate electrons and holes which react with water or air to form reactive oxygen species ($OH À , $O 2 À , h + ).…”