In situ facile fabrication of Z-scheme leaf-like β-Bi2O3/g-C3N4 nanosheets composites with enhanced visible light photoactivity
- 154 Downloads
In this work, leaf-like β-Bi2O3/g-C3N4 nanosheets composites were synthesized via a simple in situ method. β-Bi2O3/g-C3N4 nanocomposites were obtained via calcining the mixtures of g-C3N4 and metallic Bi, while, at the same temperature, in the absence of g-C3N4, metallic Bi formed α-Bi2O3. The presence of β-Bi2O3 in the composite was demonstrated by X-ray diffraction, high-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy analysis. From scanning electron microscope analysis, the morphology of leaf-like β-Bi2O3 and the g-C3N4 nanosheets were observed. The as-prepared β-Bi2O3/g-C3N4 composite exhibited higher photocatalytic activity than both pure β-Bi2O3 and g-C3N4 for photocatalytic degradation of methylene blue under visible light. The active species capture experiments and photoluminescence experiments illustrated that the degradation mechanism followed the Z-scheme mechanism. This proposed method provides an efficiency way to prepare potential visible light responsive materials for wastewater treatment.
This work was supported by the National Natural Science Foundation of China (Nos. 21277108; 21476179), the Fundamental Research Funds for the Central Universities, China (WUT: 185208007), one hundred talents project of Guangzhou University and 2016 Wuhan Yellow Crane Talents (Science) Program.
- 2.W. Wang, J. Zhou, G. Achari, J. Yu, W. Cai, Cr(VI) removal from aqueous solutions by hydrothermal synthetic layered double hydroxides: adsorption performance, coexisting anions and regeneration studies. Colloids Surf. A 457, 33–40 (2014). https://doi.org/10.1016/j.colsurfa.2014.05.034 CrossRefGoogle Scholar
- 3.J. Boonnorat, S. Techkarnjanaruk, R. Honda et al., Enhanced micropollutant biodegradation and assessment of nitrous oxide concentration reduction in wastewater treated by acclimatized sludge bioaugmentation. Sci. Total Environ. 637–638, 771–779 (2018). https://doi.org/10.1016/j.scitotenv.2018.05.066 CrossRefGoogle Scholar
- 21.Y. Deng, L. Tang, C. Feng et al., Construction of plasmonic Ag modified phosphorous-doped ultrathin g-C3N4 nanosheets/BiVO4 photocatalyst with enhanced visible-near-infrared response ability for ciprofloxacin degradation. J. Hazard. Mater. 344, 758–769 (2018). https://doi.org/10.1016/j.jhazmat.2017.11.027 CrossRefGoogle Scholar
- 24.M.-H. Vu, M. Sakar, C.-C. Nguyen, T.-O. Do, Chemically bonded Ni cocatalyst onto the S doped g-C3N4 nanosheets and their synergistic enhancement in H2 production under sunlight irradiation. ACS Sustain. Chem. Eng. 6, 4194–4203 (2018). https://doi.org/10.1021/acssuschemeng.7b04598 CrossRefGoogle Scholar
- 28.X. Zhang, Y. Yang, W. Huang et al., g-C3N4/UiO-66 nanohybrids with enhanced photocatalytic activities for the oxidation of dye under visible light irradiation. Mater. Res. Bull. 99, 349–358 (2018). https://doi.org/10.1016/j.materresbull.2017.11.028 CrossRefGoogle Scholar
- 31.N.I. Md Rosli, S.-M. Lam, J.-C. Sin, I. Satoshi, A.R. Mohamed, Photocatalytic performance of ZnO/g-C3N4 for removal of phenol under simulated sunlight irradiation. J. Environ. Eng. 144, 04017091 (2018). https://doi.org/10.1061/(asce)ee.1943-7870.0001300 CrossRefGoogle Scholar
- 35.Z. Zhang, D. Jiang, C. Xing, L. Chen, M. Chen, M. He, Novel AgI-decorated beta-Bi(2)O(3) nanosheet heterostructured Z-scheme photocatalysts for efficient degradation of organic pollutants with enhanced performance. Dalton Trans. 44, 11582–11591 (2015). https://doi.org/10.1039/c5dt00298b CrossRefGoogle Scholar
- 49.D. Chen, S. Wu, J. Fang et al., A nanosheet-like α-Bi2O3/g-C3N4 heterostructure modified by plasmonic metallic Bi and oxygen vacancies with high photodegradation activity of organic pollutants. Sep. Purif. Technol. 193, 232–241 (2018). https://doi.org/10.1016/j.seppur.2017.11.011 CrossRefGoogle Scholar
- 52.W. Chen, T. Huang, Y.X. Hua, T.Y. Liu, X.H. Liu, S.M. Chen, Hierarchical CdIn2S4 microspheres wrapped by mesoporous g-C3N4 ultrathin nanosheets with enhanced visible light driven photocatalytic reduction activity. J. Hazard. Mater. 320, 529–538 (2016). https://doi.org/10.1016/j.jhazmat.2016.08.025 CrossRefGoogle Scholar