Solar-Driven Synchronous Photoelectrochemical Sulfur Recovery and Pollutant Degradation

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Chang-Bin Chen
  • Dan-Dan Wang
  • Chen-Xuan Li
  • Feng Zhang
  • Dao-Bo Li
  • Di Min
  • Wen-Wei Li
  • Han-Qing Yu

Detail(s)

Original languageEnglish
Pages (from-to)9591-9595
Journal / PublicationACS Sustainable Chemistry and Engineering
Volume6
Issue number8
Early online date23 Jul 2018
Publication statusPublished - 6 Aug 2018

Abstract

Hydrogen sulfide (H2S) is a hazardous contaminant in many industrial gases and wastewaters and a potential source of sulfur to be recovered, but effective and sustainable recovery technologies are still lacking. Here, we report a novel photoelectrochemical process for synchronous sulfur recovery and removal of organic pollutant, which typically coexist in waste streams, by using solar-simulating light as the sole driving force. In this system, sulfide was selectively converted into high-purity elemental sulfur (S0) particles at the photoanode, whereas efficient electrochemical oxidation of carbamazepine occurred at the cathode through Fe2+/Fe3+-mediated peroxymonosulfate activation. The formed sulfur particles with initial sizes of below one micrometer gradually grew into larger particles. Iodine ions were used as anodic redox mediator to favor a selective S0 production in the solution over the formation of sulfite/sulfate at the electrode surface. The practical feasibility of this system was demonstrated by using carbamazepine-spiked lake water samples. Our work suggests a great opportunity for sustainable recovery of sulfur resource with concomitant benefits of pollutant control by using the inexhaustible solar energy.

Research Area(s)

  • Carbamazepine, Hydrogen sulfide, Photoelectrochemical system, Selective oxidation, Solar light, Sulfur recovery

Citation Format(s)

Solar-Driven Synchronous Photoelectrochemical Sulfur Recovery and Pollutant Degradation. / Li, Jie; Chen, Chang-Bin; Wang, Dan-Dan; Li, Chen-Xuan; Zhang, Feng; Li, Dao-Bo; Min, Di; Li, Wen-Wei; Lam, Paul K. S.; Yu, Han-Qing.

In: ACS Sustainable Chemistry and Engineering, Vol. 6, No. 8, 06.08.2018, p. 9591-9595.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review