Photophysical and Photocatalytic Properties of BiSnSbO6 under Visible Light Irradiation

Abstract

BiSnSbO6 with strong photocatalytic activity was first fabricated by a high-temperature, solid-state sintering method. The resulting BiSnSbO6 was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectroscopy (XPS). The results showed that BiSnSbO6, with a pyrochlore structure and a cubic crystal system by a space group Fd3m, was well crystallized. The lattice parameter or the band gap of BiSnSbO6 was 10.234594 Å or 2.83 eV. Compared with N-doped TiO2, BiSnSbO6 showed higher photocatalytic activity in the degradation of benzotriazole and rhodamine B. The apparent first-order rate constant for BiSnSbO6 in the degradation of benzotriazole and rhodamine B was 0.0182 min−1 and 0.0147 min−1, respectively. On the basis of the scavenger experiment, during the photocatalytic process, the main active species were arranged in order of increasing photodegradation rate: •OH < •O2− < h+. The removal rate of benzotriazole or rhodamine B was approximately estimated to be 100% with BiSnSbO6 as a photocatalyst after 200 min visible-light irradiation. Plentiful CO2 produced by the experiment indicated that benzotriazole or rhodamine B was continuously mineralized during the photocatalytic process. Finally, the possible photodegradation pathways of benzotriazole and rhodamine B were deduced.

Antimicrobial properties of heterojunction BiSnSbO6-ZnO composites in wastewater treatment

“…From Fig.9(b), (c), (d), it can be concluded that the BiSnSbO 6 -ZnO composite photocatalytic material, the forbidden band widths of BiSnSbO 6 and ZnO materials are 2.81 eV, 2.66 eV and 3.14 eV, respectively. This is similar to the data reported in the previous literature (J. F Luan et al 2018)…”

“…In the ZnO spectrum, the characteristic peaks at 2θ = 31.1°, 34.0°, 35.6°, 47.0°, 56.0°, 62.3° and 67.5°c orrespond to (100), (002), (101), (102), (110), (103) and (112) crystal planes, the same as the ZnO standard card (PDF#01-0562), are wurtzite hexagonal phases (V.Kononenko et al 2017; A. Sundararaj et al 2017). The characteristic diffraction peaks located at 2θ = 29.4°, 34.0°, 48.9°, 58.0°, 60.8° and 71.8°c orrespond to (222), (400), (440), (622), (444) and (800) of BiSnSbO 6 diffraction crystal plane, which is consistent with the literature report (J. F Luan et al 2018)…”

Synthesis, Crystal Structures, and Thermal Analyses of Two New Antimony Tellurite Sulfates: [Sb2(TeO4)](SO4) and [Sb2(TeO3)2](SO4)

“…Materials containing antimony have received increasing attentions mainly due to their interesting physical properties and potential applications in nonlinear optics, electrochemistry and photocatalysis, e. g., in recent years. [1][2][3][4][5][6][7][8] In the antimony compounds, a number of irregular SbO n (n = 3, 4, 5, 6) coordination geometries can be found, such as trigonalpyramidal SbO 3 , seesaw SbO 4 , square-pyramidal SbO 5 , or distorted octahedral SbO 6 . [9][10][11][12][13] Benefiting from the diversity and flexibility of its structure, SbÀ O units can construct various novel crystal structures by selecting functional building blocks to exhibit special physical properties.…”

“…Materials containing antimony have received increasing attentions mainly due to their interesting physical properties and potential applications in nonlinear optics, electrochemistry and photocatalysis, e. g., in recent years [1–8] . In the antimony compounds, a number of irregular SbO n (n=3, 4, 5, 6) coordination geometries can be found, such as trigonal‐pyramidal SbO 3 , seesaw SbO 4 , square‐pyramidal SbO 5 , or distorted octahedral SbO 6 [9–13] .…”

Structure and photocatalytic performance of rice husk-like Ba-doped GaOOH under light irradiation

“…When the R factor was less than 20%, it meant that the XRD experimental test data of the sample was in good agreement with the theoretical data. 37 In this paper, the R factor of pure GaOOH prepared by us was only 9.85%, revealing that the pure GaOOH was prepared successfully with a orthorhombic crystal system and a space group Pbnm, and the lattice parameters of pure GaOOH were a ¼ 4.509526Å, b ¼ 9.771034Å and c ¼ 2.969284Å, which was almost consistent with the reported results (orthorhombic, Pbnm, a ¼ 4.5545Å, b ¼ 9.8007Å and c ¼ 2.9738Å). 38 The rst ve peaks at 2q ¼ 21.76 , 34.00 , 35.41 , 37.46 and 54.54 were all observed clearly for pure GaOOH and Ba-doped GaOOH in Fig.…”