Ultrasonically dispersed ultrathin g-C3N4 nanosheet/BaBi2Nb2O9 heterojunction photocatalysts for efficient photocatalytic degradation of organic pollutant

Varsha D. Phadtare, Vinayak G. Parale, Taehee Kim, Kyu Yeon Lee, Abhijit N. Kadam, Haryeong Choi, Younghun Kim, Rushikesh P. Dhavale, Sang Wha Lee, Hyung Ho Park

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


Here, we present new graphite-like C3N4 (g-C3N4)/BaBi2Nb2O9 composites with remarkable photocatalytic activities under solar light irradiation that were prepared by a facile ultrasonic dispersion method. A heterojunction was formed with Aurivillius type BaBi2Nb2O9 particles and ultrathin g-C3N4 nanosheets, and this composite material was characterized by using several techniques. The ultrathin g-C3N4 nanosheets promoted extensive contact in the heterojunction, as observed by morphological analyses. Moreover, the as-synthesized ultrathin g-C3N4 nanosheets are highly porous with a specific surface area of 141 m2/g. The BaBi2Nb2O9 particles strongly absorb ultraviolet (UV) light whereas, by comparison, g-C3N4 absorbs visible light more effectively, as established by diffuse reflectance spectroscopy DRS analysis. These properties substantially improved the capacity of the as-fabricated g-C3N4/BaBi2Nb2O9 heterojunction to photocatalytically degrade the organic dye Rhodamine B (RhB) under simulated solar light and 40 W UV–visible light irradiation, versus either of the separate components of the heterojunction. Specifically, an optimal composite with approximately 30 wt% BaBi2Nb2O9 content exhibits an apparent reaction rate 0.02056 min−1 for RhB photodegradation under simulated solar light, which was nearly 1.5- and 4.3-fold higher than that of the pristine g-C3N4 and BaBi2Nb2O9 photocatalysts, respectively. In addition, the same composite had an apparent reaction rate of 0.0155 min−1 for RhB photodegradation under 40 W UV-Vis light irradiation, which was approximately 1.4- and 2.8-fold higher than the pristine components. These functionalities are also supported by photoluminescence spectroscopy analyses and photocurrent responses, which indicate a photosynergistic effect for the g-C3N4/BaBi2Nb2O9 heterojunction that enhances photoinduced interfacial charge transfer.

Original languageEnglish
Article number161037
JournalJournal of Alloys and Compounds
Publication statusPublished - 2021 Dec 5

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1A5A1019131 ). This work was supported by the Center for Advanced Meta-Materials (CAMM) funded by the Ministry of Science and ICT as Global Frontier Project" (CAMM- No. 2014M3A6B3063700 ).

Publisher Copyright:
© 2021 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


Dive into the research topics of 'Ultrasonically dispersed ultrathin g-C3N4 nanosheet/BaBi2Nb2O9 heterojunction photocatalysts for efficient photocatalytic degradation of organic pollutant'. Together they form a unique fingerprint.

Cite this