Details

Autor(en) / Beteiligte

• Zheng, Zexiao
• Ng, Yun Hau
• Tang, Yiming
• Li, Yaping
• Chen, Weirui
• Wang, Jing
• Li, Xukai
• Li, Laisheng

Titel

Visible-light-driven photoelectrocatalytic activation of chloride by nanoporous MoS2@BiVO4 photoanode for enhanced degradation of bisphenol A

Ist Teil von

• Chemosphere (Oxford), 2021-01, Vol.263, p.128279, Article 128279

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The massive emission of bisphenol A (BPA) has imposed adverse effects on both ecosystems and human health. Herein, nanoporous MoS2@BiVO4 photoanodes were fabricated on fluorine-doped tin oxide (FTO) substrates for photoelectrocatalytic degradation of BPA. The photocurrent density of the optimized photoanode (MoS2-3@BiVO4) was 5.4 times as that of BiVO4 photoanode at 1.5 V vs. Ag/AgCl under visible light illumination, which was ascribed to the reduced recombination of photogenerated charge carriers of the well-designed hybrid structure. 10 ppm of BPA could be completely degraded in 75 min by MoS2-3@BiVO4 photoanode, with a bias of 1.5 V vs. Ag/AgCl and 100 mM of NaCl as the supporting electrolyte. The electron paramagnetic resonance (EPR) and free radicals scavenging experiments confirmed that chlorine oxide radical (•ClO) played a dominant role in the degradation of BPA. 14 intermediates were detected and identified during photoelectrocatalytic degradation of BPA by MoS2-3@BiVO4 photoanode and 3 pathways were proposed based on the above intermediates. The hybrid film exhibited high stability and reusability, and promising application potential in photoelectrocatalytic degradation of organic pollutants in aqueous solution. [Display omitted] •Porous MoS2@BiVO4 photoanode improves the photoelectrochemical performance.•10 ppm of BPA could be completely removed by the optimized MoS2@BiVO4 photoanode in 75 min.•The chlorine radical (.•Cl) and chlorine oxide radical (•ClO) play dominant roles in photoelectrocatalytic degradation of BPA.