Issue 8, 2020

Construction of heterostructure based on hierarchical Bi2MoO6 and g-C3N4 with ease for impressive performance in photoelectrocatalytic water splitting and supercapacitor

Abstract

Herein, we report the synthesis of a nanohybrid material with hierarchical Bi2MoO6 and g-C3N4 by a solvothermal method. It shows impressive performance towards photoelectrocatalytic water splitting and supercapacitor applications due to the formation of type-II heterostructures, a higher surface area of 60.7 m2g−1 (Bi2MoO6 – 44.0 m2 g−1) and higher wettability. The formation of type-II heterostructures reduces the electron–hole recombination and boosts up the interfacial charge transfer in g-C3N4/Bi2MoO6, and the nanohybrid material (10 wt% g-C3N4) shows about 7- and 20-fold higher PEC efficiency than that of Bi2MoO6 and g-C3N4 under illumination (100 mW cm−2 (AM 1.5G)). Besides, due to the combination of non-faradaic and faradaic processes, g-C3N4/Bi2MoO6 (5 wt% g-C3N4) exhibits a high specific capacity of 1628 C g−1 at a current density of 2 A g−1 in a three-electrode configuration. The symmetric supercapacitor delivers a maximum cell voltage of 1.8 V with a high energy density and a power density of 47 W h kg−1 and 4500 W kg−1, respectively, and also shows excellent electrochemical stability with 90% capacitance retention even after 10 000 cycles at a current density of 5 A g−1.

Graphical abstract: Construction of heterostructure based on hierarchical Bi2MoO6 and g-C3N4 with ease for impressive performance in photoelectrocatalytic water splitting and supercapacitor

Supplementary files

Article information

Article type
Paper
Submitted
02 Feb 2020
Accepted
18 Mar 2020
First published
18 Mar 2020

Catal. Sci. Technol., 2020,10, 2427-2442

Construction of heterostructure based on hierarchical Bi2MoO6 and g-C3N4 with ease for impressive performance in photoelectrocatalytic water splitting and supercapacitor

C. Murugan, M. Karnan, M. Sathish and A. Pandikumar, Catal. Sci. Technol., 2020, 10, 2427 DOI: 10.1039/D0CY00211A

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