Vacuum

Volume 102, April 2014, Pages 1-4

Hypothermia-controlled Co-precipitation route to deposit well-dispersedβ-Bi2O3 nanospheres on polymorphic graphene flakes

Shiyi Cao Chuansheng Chen Xiaodi Xi Bin Zeng Xutao Ning Tiagui Liu Xiaohua Chen Xiangmin Meng Yi Xiao

https://doi.org/10.1016/j.vacuum.2013.10.025

Abstract

A versatile and batch-fabrication approach was developed to deposit the mono-dispersed and stable beta-bismuth oxide (β-Bi2O3) nanospheres on graphene sheets by electrolyte-assisted co-precipitation method appended with a hypothermia step. The scanning electron microscope (SEM) results showed that well-distributed β-Bi2O3nanospheres with an average size of about 20 nm were uniformly loaded on polymorphic graphene including porous, multilayered, platy and frizzy 3D structures. Activity of Bi2O3 nanospheres promoted nearly by a factor of two by graphene for RhB was discovered and the reliable stability of β-Bi2O3 was verified in further test. The homogeneity of Bi2O3 nanospheres on graphene was mainly attributed to slow nucleation under 4 °C and the help of organic electrolyte. The excellent activity of GR/β-Bi2O3 depended on graphene for its special electric structure and conduct ability.