In:
Frontiers in Chemistry, Frontiers Media SA, Vol. 10 ( 2022-5-31)
Abstract:
Dye wastewater has attracted more and more attention because of its high environmental risk. In this study, a novel TiO 2 nanotube (TNT) catalyst was prepared and its morphology and structure were characterized. The synthetic catalyst was used to degrade Rhodamine B (RhB) under UV light and evaluated for the application performance. According to the characterization results and degradation properties, the optimum synthetic conditions were selected as 400°C calcination temperature and 10 wt% Pt deposition. As a result, the degradation efficacies were sequenced as TNT-400-Pt & gt; TNT-500-Pt & gt; TNT-400 & gt; TNT-300-Pt. In addition, the effect of pH and initial concentration of RhB were explored, and their values were both increased with the decreased degradation efficacy. While the moderate volume of 11 mm of H 2 O 2 addition owned better performance than that of 0, 6, and 15 mm. Scavengers such as tertbutanol ( t -BuOH), disodium ethylenediaminetetraacetate (EDTA-Na 2 ), and nitroblue tetrazolium (NBT) were added during the catalytic process and it proved that superoxide radical anions ( O 2 – • ) , photogenerated hole (h + ) and hydroxyl radical (OH•) were the main active species contributing for RhB removal. For the application, TNT-Pt could deal with almost 100% RhB, Orange G (OG), Methylene blue (MB), and Congo red (CR) within 70 min and still kept more than 50% RhB removal in the fifth recycling use. Therefore, TNT-Pt synthesized in this study is potential to be applied to the dye wastewater treatment.
Type of Medium:
Online Resource
ISSN:
2296-2646
DOI:
10.3389/fchem.2022.922701
DOI:
10.3389/fchem.2022.922701.s001
Language:
Unknown
Publisher:
Frontiers Media SA
Publication Date:
2022
detail.hit.zdb_id:
2711776-5
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