Pd nanoparticles decorated BiVO4 pine architectures for photocatalytic degradation of sulfamethoxazole

Pt/PtOx Nanoparticle-Decorated BiVO4 Pinelike Structure for Enhanced Sulfamethoxazole Mineralization under Visible Light Irradiation

“…The XRD results (Figure S1) show that the diffraction peaks of pure BiVO 4 are consistent with those of the monoclinic scheelite of BiVO 4 (JCPDS no. 00-14-0688). , The Pt/PtO x /BiVO 4 (Figure S1) composites exhibited diffraction peaks similar to those of bare BiVO 4 , indicating that the decoration with Pt/PtO x NPs did not affect the crystalline structure of BiVO 4 . No diffraction peaks of Pt were detected, probably due to the low content and the NP size of Pt/PtO x . , Besides, the intensity of the diffraction peaks of BiVO 4 increased after the Pt/PtO x NPs were decorated, revealing enhanced crystallinity of materials …”

“…In this process, h + did not react with H 2 O to form • OH because of the more negative potential of VB (2.35 eV vs NHE) of BiVO 4 than that of E 0 ( • OH/H 2 O) (2.40 eV vs NHE) . Similarly, the potential of E 0 (O 2 / • O 2 – ) (−0.33 eV vs NHE) is also more negative than that of CB of BiVO 4 ; therefore, no • O 2 – radical can be generated in the surface of bare BiVO 4 . Nevertheless, the photoinduced electrons in the CB of BiVO 4 transfer and accumulate on Pt/PtO x NPs, and then rapidly react with dissolved O 2 in water to form reactive oxygen species (ROS), such as • O 2 – and 1 O 2 . , ROS then degrade SMX and form its intermediate compounds.…”

“…A schematic of the fabrication of BiVO 4 pinelike and Pt/PtO x /BiVO 4 is presented in Scheme . BiVO 4 pinelike architecture with co-exposed {040} and {110} crystalline planes was first prepared, as described in previous studies. , As shown in Figures a and S2a, the as-synthesized BiVO 4 pinelike architecture has a smooth surface, making it suitable for Pt loading. Subsequently, two methods, chemical reduction and photoreduction, were utilized to decorate the surface of BiVO 4 with Pt/PtO x NPs for random decoration and selective decoration, respectively (Scheme ).…”

“…00-14-0688). 34,36 The Pt/ PtO x /BiVO 4 (Figure S1) composites exhibited diffraction peaks similar to those of bare BiVO 4 , indicating that the decoration with Pt/PtO x NPs did not affect the crystalline structure of BiVO 4 . No diffraction peaks of Pt were detected, probably due to the low content and the NP size of Pt/ PtO x .…”

“…• OH/H 2 O) (2.40 eV vs NHE) 64. Similarly, the potential ofE 0 (O 2 / • O 2 − ) (−0.33 eV vs NHE)34 is also more negative than that of CB of BiVO 4 ; therefore, no • O 2 − radical can be generated in the surface of bare BiVO 4 . Nevertheless, the photoinduced electrons in the CB of BiVO 4 transfer and accumulate on Pt/PtO x NPs, and then rapidly react with dissolved O 2 in water to form reactive oxygen species (ROS), such as • O 2 − and 1 O 2 25,32.…”