Abstract:The enhanced photocurrent responses and dramatic antiphotocorrosion performance of CdS hybrid were obtained by formation of triple heterojunction (TH), i.e., n-CdS/n-TiO 2 /p-BDD:n-TiO 2 cube tubes were vertically grown on p-type boron-doped diamond (BDD) film. Then n-CdS nanoparticles (NPs) were randomly assembled onto the surface of TiO 2 and BDD, forming a film of CdS NPs. This triple heterojunction CdS hybrid reveals 36.5% improvement of initial photocurrent and 78% reduction of photocorrosion rate in cont… Show more
“…This is an inherent disadvantage of CdS photocatalyst and it considers as a defect for its cyclic operation and in environmental applications [37,38]. In order to improve the photoactivities and photostabilities of CdS semiconductor, some efforts have been devoted to producing CdS-based nanocomposites [39,40]. In fact, composites with CdS acted as acceptors for the photogenerated electrons and promoting charge separation and leaving holes on the CdS to cause photocorrosion.…”
Section: Photostability Of the Photocatalystmentioning
“…This is an inherent disadvantage of CdS photocatalyst and it considers as a defect for its cyclic operation and in environmental applications [37,38]. In order to improve the photoactivities and photostabilities of CdS semiconductor, some efforts have been devoted to producing CdS-based nanocomposites [39,40]. In fact, composites with CdS acted as acceptors for the photogenerated electrons and promoting charge separation and leaving holes on the CdS to cause photocorrosion.…”
Section: Photostability Of the Photocatalystmentioning
“…The relative increment of 50% in the photoconversion efficiency in TCBZ is explained by the extended photo-absorption spectral range of the Bi 2 S 3 QDs, and by the relative energy positions of the valence and conduction bands (VB and CB, respectively) of both sensitizers. The energy diagrams for all samples under study were determined from Mott-Schottky plots [53] and are displayed in Fig. 4; the energy gap (E g ) was obtained from the absorption spectra.…”
“…When CdS is used as a catalyst, it is generally recognized that the CdS photocorrosion is a big issue because CdS is oxidized by the photogenerated holes [31].…”
Section: Mechanism Of Photocatalytic Activity Enhancementmentioning
confidence: 99%
“…Additionally, since the valence band (VB) of Ba 1−x Sr x TiO 3 is more negative than that of CdS, photogenerated holes in the VB of CdS can flow into that of Ba 0.4 Sr 0.6 TiO 3 (see Scheme S1 in SI). Such a design can suppress the photocorrosion of CdS [31,32]. As a result, the present photocatalyst system can simultaneously suppress photocorrosion of CdS and accelerate the separation of photogenerated holes and electrons.…”
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