Controllable growth of silver nanoparticles on titanium dioxide/nitrogen-doped carbon nanofiber/molybdenum disulfide: Toward enhanced photocatalytic-activating peroxymonosulfate performance and “memory catalysis”
Date:2023-12-17 clicks:
Journal:Chemical Engineering Journal
Key Words:Photocatalytic-activating PMS; synergy; Memory catalysis; Dark deposition; Tetracycline
Abstract:The combination of photocatalysis and activating peroxymonosulfate (PMS) can generate more active species and degrade pollutants more efficiently. The introduction of “memory catalysis” in the photocatalytic-activating PMS system can further improve the catalytic degradation ability in the dark environment, because the stored electrons (e−1) during photocatalytic process can release in darkness to continue the degradation. In this paper, molybdenum disulfide (MoS2) nanosheets on titanium dioxide/nitrogen-doped carbon nanofibers (T/NC/MoS2 NFs) were prepared by electrospinning and hydrothermal treatment, and then silver (Ag) nanoparticles were deposited by photodeposition (PD) or dark deposition (DD) to form T/NC/MoS2@Ag NFs-PD and T/NC/MoS2@Ag NFs-DD, respectively. The influences of the two samples on the degradation of tetracycline (TC) and “memory catalysis” in photocatalytic-activating PMS systems were explored. The results show that T/NC/MoS2@Ag NFs-DD can remove TC more efficiently and reduce energy consumption. This is because the DD technology can effectively inhibit the growth and aggregation of Ag nanoparticles, thereby improving the e−1 storage capacity and the separation of photogenerated e−1 and holes (h+). Under outdoor solar irradiation, T/NC/MoS2@Ag NFs-DD showed excellent stability and high efficiency in catalytic degradation of a variety of organic pollutants. This study provides a new strategy to realize the efficient and energy-saving degradation of organic pollutants.
Indexed by:Research Atricle
Document Code:147752
Document Type:Research Atricle
Volume:479
Translation or Not:no
Date of Publication:2023-12-01
Included Journals:SCI
Links to published journals:https://doi.org/10.1016/j.cej.2023.147752
