Novel Bi12TiO20/g-C3N4 composite with enhanced photocatalytic performance through Z-scheme mechanism
Novel Bi12TiO20/g-C3N4 composite was successfully prepared with Bi12TiO20 nanoparticles embedded within the fluffy crumpled g-C3N4 nanosheets. Bi12TiO20/g-C3N4 composites exhibit superior photoactivity and stability. As compared with g-C3N4 and Bi12TiO20, the photocatalytic efficiency of Bi12TiO20/g-C3N4 is effectively enhanced about 1.8- and 4.9-fold, respectively. Based on the trapping experiment, ·OH and ·O2− radicals are the dominant reactive oxygen species involved in the photocatalytic process. The proposed Z-scheme mechanism of charge transfer markedly promotes the carriers’ migration and separation, leading to the enhanced photocatalytic performance.
This work was financially supported by NSFC (21001064) and the Natural Science Foundation of Jiangsu Province (BK2010487).
- 4.Yao WF, Wang H, Xu XH, Cheng XF, Huang J, Shang SX (2003) Photocatalytic property of bismuth titanate Bi12TiO20, crystals. Appl Catal A: Gen 1:185–190Google Scholar
- 17.Zhang Y, Zhang Y, Fu B, Hong M, Xiang M, Liu Z, Liu S (2015) Effects of pH on the crystal structure, morphology and microwave dielectric properties of Bi12TiO20 ceramics synthesized by citrate sol-gel method. J Mater Sci: Mater Electron 5:3179–3185Google Scholar
- 20.Zhou S, Liu Y, Li JM, Wang YJ, Jiang GY, Zhao Z, Wang DX, Duan AJ, Liu J, Wei YC (2014) Facile in situ synthesis of graphitic carbon nitride (g-C3N4)-N-TiO2 heterojunction as an efficient photocatalyst for the selective photoreduction of CO2 to CO. Appl Cat B Environ 158–159:20–29CrossRefGoogle Scholar
- 21.Ye LQ, Liu JY, Jiang Z, Peng TY, Zan L (2013) Facets coupling of BiOBr-g-C3N4 composite photocatalyst for enhanced visible-light-driven photocatalytic activity. Appl Cat B Environ 142–143:1–7Google Scholar