Synthesis of cobalt-doped tubular carbon nitride from organic–inorganic hybrid precursor for photocatalytic hydrogen generation. - Du, Yingying; Zhao, Lei; Chen, Hui; Huang, Zhaohui; He, Xuan; Fang, Wei; Li, Weixin; Zeng, Xianghui; Zhang, Fuqing (Journal of Materials Science, 2020)