Preparation of g-C3N4/Ta2O5 Composites with Enhanced Visible-Light Photocatalytic Activity

Vien Vo, Nguyen Van Kim, Nguyen Thi Viet Nga, Nguyen Tien Trung, Le Truong Giang, Pham Van Hanh, Luc Huy Hoang, Sung Jin Kim

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10 Scopus citations


g-C3N4/Ta2O5 composites have been synthesized by a facile route in which mixtures of Ta2O5 and urea are heated at various temperatures of 450°C, 500°C, and 550°C. The obtained materials (denoted as CN/TaO-T, where T is the heating temperature) were characterized using x-ray diffraction analysis, scanning electron microscopy, transmission electron microscopy, infrared spectroscopy, diffuse-reflectance ultraviolet–visible (UV–Vis) spectroscopy, thermogravimetric analysis, and x-ray photoelectron spectroscopy. The results show that the as-prepared composites are in orthorhombic Ta2O5 phase coated by g-C3N4. The photocatalytic activity of the composites was evaluated by photodegradation of methylene blue under visible light. Among the three materials, CN/TaO-500 exhibited the highest photocatalytic activity. The improved photocatalytic activity of the g-C3N4/Ta2O5 composites is attributed to the presence of g-C3N4 in the materials.

Original languageEnglish
Pages (from-to)2334-2340
Number of pages7
JournalJournal of Electronic Materials
Issue number5
StatePublished - 1 May 2016

Bibliographical note

Funding Information:
This work was supported by a National Research Foundation of Korea (NRF) Grant funded by the Korea government (MSIP) (NRF-2015R1A2A2A01004275).

Publisher Copyright:
© 2015, The Minerals, Metals & Materials Society.


  • g-CN
  • methylene blue
  • photocatalyst
  • TaO
  • urea


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