Solar light driven Rhodamine B degradation over highly active β-SiC–TiO₂nanocomposite

Abstract

A Heterojunction of a β-SiC–TiO2 nanocomposite photocatalyst is found to be robust enough to achieve high degree of Rhodamine-B degradation in presence of solar light.

Preparation and characterization of Ag3PO4/BiOI heterostructure photocatalyst with highly visible-light-induced photocatalytic properties

“…The peak intensity in the UV region (280 nm < k < 400 nm) also decreases upon increasing irradiation time, which further indicates that both dye chromophore and aromatic ring have been destroyed [19]. According to the previous studies, the degradation of dyes can be ascribed to a pseudo-first-order reaction with a Langmuir-Hinshelwood model when the initial concentration (C 0 ) of dye solution is small [6]:…”

“…They are characterized by strong structural and color stability imparted by their high degree of aromaticity and extensively conjugated chromophores [1] and conventional waste water treatment technologies are ineffective for removing dyes. Photocatalytic technology is of great potential for complete degradation of organic dye molecules to mineralize ultimate products such as CO 2 and H 2 O [2][3][4][5][6].…”

3C-SiC/ZnS heterostructured nanospheres with high photocatalytic activity and enhancement mechanism

“…4. Owing to the proper band matching between the two NC materials, 16,20 the nanosphere photocatalysts absorb photons with energy greater than the bandgap. The electrons in the conduction band of the 3C-SiC NCs are transferred to the ZnS NCs and the holes remain in the valence band of the SiC NCs.…”

“…As an important IV-IV non-metallic semiconductor, silicon carbide (SiC) nanocrystals (NCs) have attracted enormous attention because of its high excitation efficiency of electrons and holes under irradiation and widespread applications to biosensors, photocatalysis, and supercapacitors. [12][13][14] To enhance the photocatalytic performance, that is, efficient separation of photogenerated electrons and holes, some composite SiC catalysts such as SnO 2 /SiC hollow sphere nanochains, 15 cubic SiC (3C-SiC)/TiO 2 nanocomposites 16 have been developed. These catalysts can efficiently separate photoexcited electrons and holes and produce good photocatalytic activity by means of a heterostructure.…”

3C-SiC nanocrystals/TiO2 nanotube heterostructures with enhanced photocatalytic performance

“…4(c)]. 25,26 These holes react with -OH to form hydroxyl radicals ( • OH). 20 When more SiC NCs cover the NTA, they will reduce the light absorption by the TiO 2 NTs.…”