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Synthesis of PbMo1-xCrxO4 Oxides Prepared Using Hydrothermal Process and their Photocatalytic Activity

수열합성법에 의한 PbMo1-xCrxO4 산화물의 합성 및 광촉매 활성

  • Song, Young In (Department of Chemical Engineering, Pukyong National University) ;
  • Hong, Seong-Soo (Department of Chemical Engineering, Pukyong National University)
  • Received : 2015.09.03
  • Accepted : 2015.10.15
  • Published : 2015.12.10

Abstract

Both lead molybdate ($PbMoO_4$) and chromium substituted lead molybdate ($PbMo_{1-x}Cr_xO_4$) were successfully synthesized using a conventional hydrothermal method and characterized by XRD, DRS, Raman, SEM and PL. We also investigated the photocatalytic activity of these materials for the decomposition of rhodamine B under UV-visible irradiation. The XRD and Raman results revealed the successful synthesis of well-crystallized $PbMoO_4$ crystals with the diameter of 51-59 nm, regardless of the addition of chromium ion. The DRS spectra of $PbMo_{1-x}Cr_xO_4$ catalysts showed new intensive absorption bands in the visible region. The $PbMoO_4$ catalysts showed the lowest photocatalytic activity and the activity increased with an increase of chromium substitution amounts under visible irradiation. PL peaks appeared at about 540-580 nm for all catalysts and excitonic PL signals were proportional to the photocatalytic activity for the decomposition of rhodamine B.

Keywords

$PbMoO_4$ and $PbMo_{1-x}Cr_xO_4$ catalysts;hydrothermal process;photocatalytic decomposition of Rhodamine B

Acknowledgement

Supported by : 부경대학교

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