Synthesis of fullerene modified with Ag2S with high photocatalytic activity under visible light

Abstract

We improve the photocatalytic effect of Ag 2 S under visible light by using fullerene modified with Ag 2 S nanoparticles. Surface areas and pore volumes of the Ag 2 S-fullerene samples showed catastrophic decreases due to the deposition of Ag 2 S. The generation of reactive oxygen species was detected through the oxidation reaction from 1,5-diphenyl carbazide (DPCI) to 1,5-diphenyl carbazone (DPCO). It is found that the photocurrent density and the photocatalytic effect increase in the case with the modified fullerene. In comparison with the separate effects of Ag 2 S and fullerene nanoparticles, the photocatalytic effect of the fullerene modified with Ag 2 S composites is increased significantly due to the synergetic effect between the fullerene and the Ag 2 S nanoparticles.

RETRACTED: Synthesis and characterization of silver sulfide nanoparticles for photocatalytic and antimicrobial applications

“…This NP is solid ionic conductor conducting both ions and electrons at room temperature [4]. Ag 2 S has a direct band gap of 0.9-1.05 eV, and large absorption coefficient which shows an effective semiconductor material for photovoltaic application [2]. The unique properties of Ag 2 S NPs led to variety of application such as in solar cells, photo-detectors, light emitting diodes and switches, photoconductors, IR detectors, magnetic field sensors, optical filters, super-ionic conductors, solar-selective coatings and room temperature oxygen sensors [1,3,5,6].…”

“…Among the all, silver sulfide (Ag 2 S) NPs is an important material as photocatalyst. Ag 2 S is a direct, narrow-band gap semiconductor with good chemical stability and good optical limiting properties [2,3]. This NP is solid ionic conductor conducting both ions and electrons at room temperature [4].…”

Ag-based semiconductor photocatalysts in environmental purification

“…Table1 Band structure of Ag-based compounds Compounds E g (eV) E VB (eV) E CB (eV) Ag 2 O [31] 1.20 1.40 0.20 Ag 2 S [32] 0.92 0.92 0 Ag 2 CO 3 [33] 2.30 2.67 0.37 Ag 3 PO 4 [34] 2.36~2.42 2.87(E g =2.42) 0.45 AgCl [35] 2.07 2.61 0.54 AgBr [37] 2.60 2.60 0 AgI [36] 2.80 2.38 -0.42 The organic pollutant was decomposed by both Br 0 and h + due to their powerful oxidation ability. It was found that exposure to sun light for 5 min, methylene blue (MB) dye can be completely degraded by Ag/AgBr.…”

Facile synthesis of graphene-like Co3S4 nanosheet/Ag2S nanocomposite with enhanced performance in visible-light photocatalysis

“…For example, Ag 2 S was shown to absorb visible light due to its narrow band-gap (0.92 eV) [28]. Its photocatalytic properties in organic pollutants degradation [10] and H 2 production have been studied [29].…”