Structural, photophysical and photocatalytic properties of Bi2MTaO7 (M = La and Y)

Rapid decolorization and mineralization of simulated textile wastewater in a heterogeneous Fenton like system with/without external energy

“…The photoreactor was also covered by aluminum foils in order to improve utilization of UV light. Initial photonic efficiency of RB5 can be calculated by [18]. Purified air (National Oxygen of Singapore Pte Ltd.) was supplied through a glass diffuser at the flow rate of 1.0 L min −1 .…”

Synthesis of Bi–Fe–Sb–O Pyrochlore Nanoparticles with Visible‐Light Photocatalytic Activity

“…[17,20,21] The specific surface area of the sample chosen for photocatalytic testing was 30 m 2 /g. This relatively low value is due to the high density of the compound (6.77 g/cm 3 ). The photocatalytic activity of Bi-Fe-Sb-O pyrochlore was evaluated for the degradation of crystal violet in an aqueous solution under visiblelight irradiation with and without H 2 O 2 addition.…”

“…In the second method, bismuth and iron nitrates were preliminary dissolved in HNO 3 and subsequently precipitated with a concentrated NaOH solution. The availability of excess NO 3 -ions can influence the phase composition of the products markedly and contaminate the sample surface.…”

“…[1] The high photoactivities of oxides with the pyrochlore structure have been reported previously. [2][3][4][5][6] Photocatalytic water decomposition was observed in the presence the Bi-containing compounds Bi 2 MTaO 7 (M = In, Ga, Fe, Y, La) [2,3] and Bi 2 MNbO 7 [M = Al, Ga, In, Y, rare-earth element (REE)]; [4,5] in turn, Bi 2 MNbO 7 (M = Al, Ga, In, Fe) [6,7] and Bi 2 MTaO 7 (M = Y, La) [3] can be used for the photodecomposition of organic dyes. The photoactivities of the Bi 2 MSbO 7 compounds have not been studied previously, although Y 2 FeSbO 7 and In 2 FeSbO 7 can be used as photocatalysts for rhodamine B degradation.…”

Preparation of efficient visible-light-driven BiOBr/Bi2O3 heterojunction composite with enhanced photocatalytic activities

“…It further indicates that the BiOBr/Bi 2 O 3 To understand the transfer and recombination processes of the photoexcited charge carriers in these samples, photoluminescence (PL) spectra were measured. This technique can reflect the recombination rate of the photoinduced electrons and holes, which are useful to evaluate the photocatalytic performance of the semiconductor materials [34,35]. Fig.…”