Photocatalytic degradation of dyes using synthesized δ-MnO2 nanostructures

被引:16
作者
Khatri, Manita [1 ]
Gupta, Aakash [2 ]
Gyawali, Kabita [1 ]
Adhikari, Anup [1 ]
Koirala, Agni Raj [3 ]
Parajuli, Niranjan [1 ]
机构
[1] Tribhuvan Univ, Cent Dept Chem, Biol Chem Lab, Kathmandu 44618, Nepal
[2] Univ Massachusetts Dartmouth, Dept Chem & Biochem, N Dartmouth, MA USA
[3] Sogang Univ, Korea Ctr Artificial Photosynth, Seoul, South Korea
来源
CHEMICAL DATA COLLECTIONS | 2022年 / 39卷
关键词
Manganese dioxide; Dye degradation; Photocatalytic reaction; Nanostructure; MANGANESE OXIDES; FLOWER-LIKE; SEMICONDUCTOR; PERFORMANCE; FABRICATION;
D O I
10.1016/j.cdc.2022.100854
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Nanostructures of manganese dioxide with unobjectionable properties can be employed to degrade organic waste. The polyol technique was used to create delta-MnO2 nanostructures (NSs), which were then characterized using X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), and Ultraviolet-visible spectroscopy (UV-Vis). The Tauc plot predicted the band gap energy of various molar ratios as 3.02, 2.53, and 2.45 eV. The net charge and stability of delta-MnO2 were pH-dependent, influencing Congo red (CR) and Methylene blue (MB) dyes degradation efficiency. Moreover, various characteristic parameters viz; pH, time, and catalyst dosage on the degradation of dyes were also investigated, and more than 50% CR degradation was observed within 5 min. Photo-degradation study of dyes revealed that MB was degraded effectively at alkaline pH, unlike CR. However, reverse degradation was seen with CR on increasing the dose from 10 mg.
引用
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页数:13
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