www.nature.com/scientificreports OPEN Efficient Photocatalytic Bilirubin Removal over the Biocompatible received: 14 December 2016 accepted: 07 February 2017 Published: 13 March 2017 Core/Shell P25/g-C3N4 Heterojunctions with Metal-free Exposed Surfaces under Moderate Green Light Irradiation Shifei Kang...