Ag/Bi12O17Cl2 composite: A case study of visible-light-driven plasmonic photocatalyst

Abstract

a b s t r a c tIn this investigation, novel Ag/Bi 12 O 17 Cl 2 plasmonic composites with different Ag contents were constructed through a solvothermal and subsequent photoreduction route and fully characterized by a collection of analytical techniques. Spectroscopic results confirmed the presence and uniform dispersion of Ag nanoparticles on the 2D nanosheets of Bi 12 O 17 Cl 2 . The Ag content in composites exerted considerable influence on the extension of light-adsorption range and the enlargement of specific surface areas. The photocatalytic abilities of these Ag/Bi 12 O 17 Cl 2 composites were evaluated toward the degradation of rhodamine B (RhB) and 2,4-dichlorophenol (2,4-DCP) under the visible-light irradiation. The results demonstrated that the Ag/Bi 12 O 17 Cl 2 composites showed much higher photocatalytic efficiencies than that of pure Bi 12 O 17 Cl 2 , especially the sample with an optimal Ag content showing the best photocatalytic behavior among all tested samples. The remarkable enhancement of Ag/Bi 12 O 17 Cl 2 photocatalytic efficiency could be mainly attributed to the efficient charge separation that was induced by the localized surface plasmon resonance effect of metallic Ag, strong visible-light adsorption and the favorable morphology with enlarged specific surface areas. Eventually, the photocatalysis mechanism over Ag/Bi 12 O 17 Cl 2 composites was preliminarily proposed on the base of reactive species trapping experiments.

In situ construction, photocatalytic performance, and mechanism speculation of plasmonic binary Bi/β-Bi2O3 hybrids

“…Correspondingly, two peaks centered at 163.9 eV and 158.6 eV in sample Bi-230°C stay on the relatively low filed in comparison to those in sample Bi-270°C [27,28], probably attributing to the interaction of these species with metallic Bi in sample Bi-230°C at positions of 162.1 eV and 156.7 eV resulted from the electrons migrated from metallic Bi to bismuth oxide [23]. Similar phenomena were also found in metallic Ag coupled with ZnO [29] or Bi 12 O 17 Cl 2 [30]. The coverage of thin amorphous β-Bi 2 O 3 film of several nanometers on surface cannot impede the entry of incident light and further occurrence of SPR effect or photocatalytic behavior.…”

Facile Fabrication of Flower-Like BiOI/BiOCOOH p–n Heterojunctions for Highly Efficient Visible-Light-Driven Photocatalytic Removal of Harmful Antibiotics

“…The photoluminescence (PL) spectra can reveal the recombination degree of photo-excited charge carriers, hence, the PL spectra of BiOCOOH and IBOCH-2 were measured (Figure 11). In general, the low PL intensity facilitated charge separation and, consequently, superior photocatalytic ability [30,36,37,38,39,40,41]. Compared to f BiOCOOH, IBOCH-2 exhibited a much lower PL intensity, signifying that the introduction of BiOI can effectively suppress the recombination of charge carriers through promoting the interfacial charge transfer.…”

Construction of 2D/2D layered g-C3N4/Bi12O17Cl2 hybrid material with matched energy band structure and its improved photocatalytic performance

“…3B), the peaks at 159.1 and 164.4 eV could be assigned as the Bi 4f 7/2 and Bi 4f 5/2 , respectively. 42 For the Cl 2p spectrum in Fig. 3C, the signal is deconvoluted into two peaks at 197.9 and 199.6 eV, attributed to Cl 2p 3/2 and Cl 2p 1/2 signals, respectively, deriving from the Cl À .…”