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

页数：13

共 38 条

[1]

Aisien FA., 2013, J ENG APPL SCI, V9, P11

[2] Preparation of ultra long α-MnO2 and Ag@MnO2 nanoparticles by seedless approach and their photocatalytic performance [J].

Alzahrani, Salma Ahmed ;

Al-Thabaiti, Shaeel Ahmed ;

Al-Arjan, Wafa Shamsan ;

Malik, Maqsood Ahmad ;

Khan, Zaheer .

JOURNAL OF MOLECULAR STRUCTURE, 2017, 1137 :495-505

[3] Photocatalytic degradation of model textile dyes in wastewater using ZnO as semiconductor catalyst [J].

Chakrabarti, S ;

Dutta, BK .

JOURNAL OF HAZARDOUS MATERIALS, 2004, 112 (03) :269-278

[4] Recent developments in MnO2-based photocatalysts for organic dye removal: a review [J].

Chiam, Sin-Ling ;

Pung, Swee-Yong ;

Yeoh, Fei-Yee .

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2020, 27 (06) :5759-5778

[5] Light-Assisted Synthesis of Hierarchical Flower-Like MnO2 Nanocomposites with Solar Light Induced Enhanced Photocatalytic Activity [J].

Das, Sankar ;

Sarnanta, Arnab ;

Jana, Subhra .

ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 2017, 5 (10) :9086-9094

[6] Controlled preparation of MnO2 hierarchical hollow nanostructures and their application in water treatment [J].

Fei, Jinbo ;

Cui, Yue ;

Yan, Xuehai ;

Qi, Wei ;

Yang, Yang ;

Wang, Kewei ;

He, Qiang ;

Li, Junbai .

ADVANCED MATERIALS, 2008, 20 (03) :452-+

[7] Process optimization for biosynthesis of mono and bimetallic alloy nanoparticle catalysts for degradation of dyes in individual and ternary mixture [J].

Ghosh, Sabyasachi ;

Roy, Swarup ;

Naskar, Jishu ;

Kole, Ramen Kumar .

SCIENTIFIC REPORTS, 2020, 10 (01)

[8] A Hollow-Structured Manganese Oxide Cathode for Stable Zn-MnO2 Batteries [J].

Guo, Xiaotong ;

Li, Jianming ;

Jin, Xu ;

Han, Yehu ;

Lin, Yue ;

Lei, Zhanwu ;

Wang, Shiyang ;

Qin, Lianjie ;

Jiao, Shuhong ;

Cao, Ruiguo .

NANOMATERIALS, 2018, 8 (05)

[9] Photocatalytic Degradation of Methylene Blue over TiO2 Pretreated with Varying Concentrations of NaOH [J].

Hou, Chentao ;

Hu, Bo ;

Zhu, Jiaming .

CATALYSTS, 2018, 8 (12)

[10] Toward NIR driven photocatalyst: Fabrication, characterization, and photocatalytic activity of β-NaYF4:Yb3+,Tm3+/g-C3N4 nanocomposite [J].

Huang, Min-Zhong ;

Yuan, Baoling ;

Dai, Leyang ;

Fu, Ming-Lai .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2015, 460 :264-272

← 1 2 3 4 →