Synthesis, Characterization, and Investigation of Visible Light Photocatalytic Activity of C Doped TiO₂/CdS Core-Shell Nanocomposite

Abstract

Carbon (C) doped TiO 2 /CdS core-shell nanocomposite (C/TiO 2 /CdS) was synthesized using microemulsion method. Synthesized powder was characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), energy dispersive Xray spectroscopy (EDX), transmission electron microscopy (TEM), and UV-visible spectrophotometery. TEM images reveal that C/TiO 2 /CdS core-shell heterostructure is successfully prepared with CdS as a core and C doped TiO 2 as a shell. UV-visible absorption spectra show that CdS nanoparticles act as a sensitizer and effectively enhance the photoabsorption capacity of C/TiO 2 /CdS nanocomposite in visible region. Visible light photocatalytic activity of synthesized nanocomposite was evaluated for the degradation of methylene blue. C/TiO 2 /CdS core-shell nanocomposite exhibits better photocatalytic activity as compared to bare TiO 2 , CdS, CdS/TiO 2 , and C doped TiO 2 .

Fabrication, functionalization and performance of doped photocatalysts for dye degradation and mineralization: a review

“…Amongst all the combinations, 1 g L −1 of catalyst load showed a maximum degradation potential (84.8%) for 20 mg L −1 concentration of methyl red dye in 60 min which was accounted as 11.3% more than native TiO 2 NPs (Sathish Kumar et al 2018). The microemulsion method was also employed to synthesize carbon (C)-doped TiO 2 /CdS core-shell NPs (Lavand et al 2015), wherein the morphology characterization data obtained by TEM revealed that C/TiO 2 /CdS core-shell heterostructure composites with CdS as an inner core and C-doped TiO 2 as the outer shell were successfully obtained by the microemulsion method. Moreover, the fabricated heterostructure was successfully employed for the degradation of methylene blue and it was found to be stable and reusable (Lavand et al 2015).…”

“…The microemulsion method was also employed to synthesize carbon (C)-doped TiO 2 /CdS core-shell NPs (Lavand et al 2015), wherein the morphology characterization data obtained by TEM revealed that C/TiO 2 /CdS core-shell heterostructure composites with CdS as an inner core and C-doped TiO 2 as the outer shell were successfully obtained by the microemulsion method. Moreover, the fabricated heterostructure was successfully employed for the degradation of methylene blue and it was found to be stable and reusable (Lavand et al 2015). More recently, Lavand et al (2019) prepared co-doped nanocomposites of TiO 2 with C and iron (Fe) using microemulsion approach.…”

Visible Light-Active CdS/TiO2 Hybrid Nanoparticles Immobilized on Polyacrylonitrile Membranes for the Photodegradation of Dyes in Water

“…e bands at 1640 cm −1 and 3445 cm −1 are attributed to the bending vibration of water and O-H stretching of adsorbed water on the surface of CdS, respectively. In the spectrum of CdS/TiO 2 , the peak due to Cd-S was not seen probably due to overlapping with Ti-O-Ti and Ti-O peaks [17]. e shift of the C�O stretching peak from 1644 cm −1 in the spectra of PVP to 1637 cm −1 in the spectra of capped CdS nanoparticles could indicate a strong interaction between the nanoparticles and the PVP.…”

A Visible Light Photocatalyst of Carbonate‐Like Species Doped TiO2

“…10,11 Various works have focused on the carbon-doped TiO 2 via sol-gel process, thermal oxidation of TiC, doping in gas phase or solvothermal synthesis. 5,8,[12][13][14][15][16] Through these ways, C atom is efficient doped replacing the site of O atom, but the synthesis methods are rigorous, complicated and needing extra carbon source. Moreover, the photocatalytic properties of those carbon-doped TiO 2 are not that meeting expectation.…”