20January2017

Nano-Micro Letters

In-situ Hydrothermal Synthesis of Bi-Bi2O2CO3 Heterojunction Photocatalyst with Enhanced Visible Light Photocatalytic Activity

Prasenjit Kar1, Tuhin Kumar Maji1, Ramesh Nandi1, Peter Lemmens2,3 and Samir Kumar Pal1,*

Abstract
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Nano-Micro Lett. (2017) 9: 18

Published Online: 23 September 2016 (Article)

DOI: 10.1007/s40820-016-0118-0

 

Abstract

 


Figure discription XXX

Bismuth containing nanomaterials recently received increasing attention with respect to environmental applications because of their low cost, high stability and nontoxicity. In this work, Bi-Bi2O2CO3 heterojunctions were fabricated by in-situ decoration of Bi nanoparticles on Bi2O2CO3 nanosheets via a simple hydrothermal synthesis approach. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high-resolution TEM (HRTEM) were used to confirm the morphology of the nanosheet-like heterostructure of the Bi-Bi2O2CO3 composite. Detailed ultrafast electronic spectroscopy reveals that the in-situ decoration of Bi nanoparticles on Bi2O2CO3 nanosheets exhibit a dramatically enhanced electron-hole pair separation rate, which results in an extraordinarily high photocatalytic activity for the degradation of a model organic dye, methylene blue (MB) under visible light illumination. Cycling experiments revealed a good photochemical stability of the Bi-Bi2O2CO3 heterojunction under repeated irradiation. Photocurrent measurements further indicated that the heterojunction incredibly enhanced the charge generation and suppressed the charge recombination of photogenerated electron-hole pairs.


 

Keywords

Bi nanoparticles; Bi-Bi2O2CO3 nanosheets; Heterojunction; Hydrothermal method; Charge separation; Visible light photocatalytic activity

 

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