Journal
OPTICAL MATERIALS
Volume 116, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.optmat.2021.111094
Keywords
Dy3+ doping; Flower-like Bi2MoO6; Simulated sunlight; Rhodamine B; Photocatalytic performance
Categories
Funding
- State Key Laboratory of Coal Mine Disaster Dynamics and Control [2011DA105287-zd201904]
- Innovative Talents Training Program for Chongqing Primary and Secondary School Students [CY200117]
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The flower-like Dy3+-doped Bi2MoO6 photocatalyst demonstrated excellent degradation efficiency for Rhodamine B, close to 100% within 40 minutes under simulated sunlight. The small band gap energy and abundant adsorption sites contributed to its high photocatalytic performance in treating organic contaminants in wastewater.
In this work, the flower-like Dy3+-doped Bi2MoO6 was successfully designed and synthesized by a two-step process involving solvothermal and calcination methods and was used as a photocatalyst to decontaminate Rhodamine B (RhB). Different doping ratios were investigated, and the results showed that 3 mol% Dy3+-doped Bi2MoO6 had excellent photocatalytic activity. The RhB (10 mg/L) degradation efficiency of 3 mol% Dy3+-doped Bi2MoO6 was close to 100% within 40 min under simulated sunlight, which was related to the small band gap energy (2.46 eV) of this photocatalyst. Meanwhile, the flower-like Dy3+-doped Bi2MoO6 provided more adsorption sites for photodegradation. The active species trapping experiments exhibited that superoxide radical (O-center dot(2)-), hole (h(+)) and hydroxyl radical ((OH)-O-center dot) played vital roles in purifying RhB. Based on a series of analyses, the Dy3+-doped Bi2MoO6 photocatalytic mechanism was proposed. This research suggests that the Dy3+-doped Bi2MoO6 possesses simple synthetic process and high photocatalytic performance, which shows a potential application for treating the organic contaminants in wastewater.
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