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Sol Gel Fabricated LCT0.4/SCO3 Perovskite Oxide Catalyst for Advanced Oxidation Process of RhB


Paper Type 
Contributed Paper
Title 
Sol Gel Fabricated LCT0.4/SCO3 Perovskite Oxide Catalyst for Advanced Oxidation Process of RhB
Author 
Lingfeng He and Yongli Zhang
Email 
331538792@qq.com
Abstract:

Perovskite oxides have ultra applications for advanced oxidation in wastewater. Environmental protection treatment process relies on the durability, and performance of catalysts to drive the development of cutting-edge sustainable technologies for the elimination of refractory contaminants. Reference of LCT0.4/SCO3 produce singlet oxygen is rare. Herein, prepared LCT0.4/SCO3 were successfully prepared through glucose by Sol-gel method, and further utilized as super catalysts to degrade Rhodamine B (RhB) by coupling with peroxymonosulfate (PMS) in environmental protection. Preparation of lanthanum cobalt titanium oxide and No. 3 strontium cobalt oxide catalysts (Sol gel No. 3), abbreviated as LCT0.4/SCO3. XRD, SEM, XPS, UV-Vis and ESR to characterize the catalyst, to study the effect of SCO3 and LCT0.4 composite on the performance. The results showed that the composite catalyst had no significant effect on the activity of the catalyst. Three parameters (LCT0.4/ SCO3 dosage of 0.038 g L-1, PMS concentration of 0.571 g L-1, and original pH) were obtained via test method in environmental protection. Benefiting from the larger specific surface area, pore-volume, and existence of abundant hydroxyl groups, LCT0.4/SCO3 prepared through glucose by Sol-gel method with more available active sites exhibited a super efficiency of 89.2 % toward catalytic degradation of RhB under the optimal conditions. The degradation rate was 4.1 times higher than that without PMS. Moreover, LCT0.4/SCO3 demonstrated durability and stability. The scavenging experiments and electron paramagnetic resonance technologies revealed that non-radical singlet oxygen (1O2) was associated as active species in the LCT0.4/SCO3/PMS system. Besides, the reaction mechanism on the LCT0.4/SCO3 degradation pathways toward RhB was speculated under PMS activation. The results indicated that the effects between structures not only significantly boosted the removal efficiency and long term stability of LCT0.4/SCO3. But also facilitated the redox cycles, which produce 1O2. This proof-of-concept approach to develop such high-efficient structures produced will open up novel avenues for wastewater decontamination via PMS activation.

Start & End Page 
1575 - 1586
Received Date 
2021-03-10
Revised Date 
2021-07-17
Accepted Date 
2021-08-09
Full Text 
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Correspondence & Author Name 
Keyword 
singlet oxygen, glucose, sol gel method, Perovskite LCT0.4/SCO3, PMS
Volume 
Vol.48 No.6 (November 2021)
DOI 
View:278 Download:49

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Chiang Mai Journal of Science

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