DOI QR코드

DOI QR Code

The Synthesis of Bi2WO6 by Hydrothermal Process and Their Photocatalytic Activity

수열합성법에 의한 Bi2WO6의 합성 및 그들의 광촉매 활성

  • Hong, Seong-Soo (Department of Chemical Engineering, Pukyong National University)
  • Received : 2019.10.29
  • Accepted : 2019.11.26
  • Published : 2020.05.01

Abstract

Bi2WO6 were successfully synthesized using EGME, GL, EG and water as solvents by a conventional hydrothermal method. They were characterized by XRD, DRS, BET and SEM and we also investigated the photocatalytic activity of these materials for the decomposition of Rhodamin B under visible light irradiation. The XRD results revealed the successful synthesis well-crystallized Bi2WO6 crystals with Aurivillius structure when EGME and EG are used as solvents. In addition, the well-crystallized Bi2WO6 crystals showed the flower-like structure. The Bi2WO6 catalysts prepared at 180 ℃ using EGME as a solvent showed the highest photocatalytic activity. The Bi2WO6 catalysts prepared at mole ratio of H2O/EGME more than 50% showed high photocatalytic activity.

EGME, GL 및 EG와 물을 용매를 사용하여 Bi2WO6 산화물을 수열합성법으로 성공적으로 합성하였다. 이들 촉매들의 물리적 특성을 XRD, DRS, BET 및 SEM 등으로 분석하였고 제조된 촉매들을 사용하여 가시광선 조사 하에서의 로다민 B의 광분해 반응에서의 활성을 조사하였다. XRD의 분석 결과에 의하면 EGME 및 EG를 용매로 사용한 경우에는 Bi2WO6의 결정화가 잘 이루어졌다. 또한, 결정화가 잘 이루어진 Bi2WO6는 꽃 모양의 형상을 나타내었다. 180 ℃에서 EGME를 용매로 사용하여 제조된 Bi2WO6 촉매가 가장 높은 광분해 활성을 나타내었으며, EGME에 비해 물의 몰 비가 50% 이상으로 제조한 경우에 높은 광촉매 활성을 보여주었다.

Keywords

References

  1. Konstantinou, I. K. and Albanis, T. A., "$TiO_2$-Assisted Photocatalytic Degradation of Azo Dyes in Aqueous Solution: Kinetic and Mechanistic Investigations," Appl. Catal. B, 49, 1-14(2004). https://doi.org/10.1016/j.apcatb.2003.11.010
  2. Kudo, A., Steinberg, M., Bard, A. J., Campton, A., Fox, M. A., Mallouk, T. E., Webber, S. E. and White, J. M., "Photoactivity of Ternary Lead-group IVB Oxides for Hydrogen and Oxygen Evolution," Catal. Lett., 5, 61-65(1990). https://doi.org/10.1007/BF00772094
  3. Guangcheng, X. and Jinhua, Y., "Synthesis of Bismuth Vanadate Nanoplates with Exposed {001} Facets and Enhanced Visible-light Photocatalytic Properties," Chem. Commun., 46, 1893-1895(2000). https://doi.org/10.1039/b923435g
  4. Ye, D., Li, D. Z., Zhang, W., Sun, M., Hu, Y., Zhang, Y. and Fu, X., "A New Photocatalyst $CdWO_4$ Prepared with a Hydrothermal Method," J. Phys Chem C, 112, 17351-17356(2008). https://doi.org/10.1021/jp8059213
  5. Zou, Z., Ye, J., Sayama, K. and Arakawa, H., "Direct Splitting of Water under Visible Light Irradiation with an Oxide Semiconductor Photocatalyst," Nature, 414, 625-627(2001). https://doi.org/10.1038/414625a
  6. Fu, H., Pan, C., Yao, W. and Zhu, Y., "Visible-Light-Induced Degradation of Rhodamine B by Nanosized $Bi_2WO_6$," J. Phys Chem C, 109, 22432-22430(2005). https://doi.org/10.1021/jp052995j
  7. Hu, S. P., Xu, C. Y. and Zhen, L., "Solvothermal Synthesis of $Bi_2WO_6$ Hollow Structures with Excellent Visible-light Photocatalytic Properties," Mater. Lett., 95, 117-120(2013). https://doi.org/10.1016/j.matlet.2012.12.058
  8. Zhang, L., Wang, W., Zhou, L. and Xu, H., "$Bi_2WO_6$ Nano- and Micro- structures: Shape Control and Associated Visible-Light-Driven Photocatalytic Activities," Small, 9, 1618-1625(2007). https://doi.org/10.1002/smll.200700043
  9. Zhang, C. and Zhu, Y., "Synthesis of Square $Bi_2WO_6$ Nanoplates as High-Activity Visible-Light-Driven Photocatalysts," Chem. Mater., 17, 3537-3545(2005). https://doi.org/10.1021/cm0501517
  10. Zhang, L., Man, Y. and Zhu, Y., "Effects of Mo Replacement on the Structure and Visible-Light-Induced Photocatalytic Performances of $Bi_2WO_6$ Photocatalyst," Catalysis, 1, 841-848(2011).
  11. Shang, M., Wang, W. and Xu, H., "New $Bi_2WO_6$ Nanocages with High Visible-Light-Driven Photocatalytic Activities Prepared in Refluxing EG," Crys. Grow. & Design, 9, 991-996(2009). https://doi.org/10.1021/cg800799a
  12. Verma, S., Joy, P. A., Khollam, Y. B., Potdar, H. S. and Deshpande, S. B., "Synthesis of Nanosized $MgFe_2O_4$ Powders by Microwave Hydrothermal Method," Mater. Lett., 58, 1092-1095(2004). https://doi.org/10.1016/j.matlet.2003.08.025
  13. He, Z. Q., Shi, Y. Q., Gao, C., Wen, L. M., Chen, J. M. and Song, S., "BiOCl/$BiVO_4$ p-n Hetero-junction with Enhanced Photocatalytic Activity under Visible-light Irradiation," J. Phys. Chem. C, 118, 389-398(2014). https://doi.org/10.1021/jp409598s
  14. Jung, W. Y. and Hong, S. S., "Synthesis of $LaCoO_3$ Nanoparticles by Microwave Process and Their Pphotocatalytic Activity under Visible Light Irradiation," J. Ind. & Eng. Chem., 19, 157-160(2013). https://doi.org/10.1016/j.jiec.2012.07.018