Size engineered Cu-doped α-MnO2 nanoparticles for exaggerated photocatalytic activity and energy storage application. (July 2019)

• Record Type: Journal Article
• Authors: Mondal, Dheeraj; Das, Santanu; Paul, Biplab Kumar; Bhattacharya, Debopriya; Ghoshal, Debopriyo; Gayen, Ananda Lal; Das, Kaustuv; Das, Sukhen
• Is Part Of: Materials research bulletin. Volume 115(2019)
• Page Start: 159
• Page End: 169
• Publication Date: 2019-07
• Subjects: α-MnO2 nanoparticles -- Photoluminescence -- Supercapacitor -- Photocatalysis; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2019.03.023
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Cu impregnated α-MnO2 nanoparticles synthesized by modified Chemical route. Sintering temperature modulates particle size as well as optical band gap. Enhanced photocatalytic activity, even at ultralow concentration of our material. Excellent electrochemical performance with higher capacitance and energy density. Fabricated device is capable to enlighten 73 LEDs for 10 min. Abstract: This investigation involves the synthesis of Cu doped α-MnO2 nanoparticles through modified Chemical route. Obtained nanoparticles (diameter_˜5 nm to ˜18 nm) are found mostly stable at high temperature and its size can be modulated by Cu doping and post sintering temperature variation. Cyclic voltammetry and galvanostatic charge-discharge performance indicate the excellent cycling stability along with a maximum capacitance of 229.5 F/g for current density of 1 A/g. Our fabricated device is also capable to power up 73 numbers of LED for 10 min after being charged for 10 s. From the photocatalytic experiment, degradation efficiency of 73.1% has been achieved by using even ultra diluted aqueous solution (0.0025 g/L) of active material to degrade the pollutant dye like Brilliant Green of 5 ppm concentration. Entire results suggest that the synthesized materials are the promising candidate to be used in photocatalysis and supercapacitive application purpose.