Synthesis of bulk g-C3N4/Bi2WO6 nanocomposite for effective photocatalytic reaction and for antimicrobial activity by hydrothermal method

Bi2WO6 was modified by adding metallic-free polymer graphitic carbon nitrite-g-C3N4 for efficient photocatalytic performance and also for antimicrobial activity. Bulk g-C3N4/Bi2WO6 was synthesized by a simple hydrothermal method. Structure and morphology characterization have been performed by XRD, FE-SEM, SAED pattern, and HR-TEM analysis, which provides well-defined nanoplate structure of Bi2WO6 and bulk structure of g-C3N4. In these g-C3N4/Bi2WO6 catalysts have two-dimensional heterogeneous structures which provide the number of photoinduced charge carriers for effective photocatalytic reaction. EDS study confirms the presence of Bi, W, O, N, and C molecules in the composite and crystal structure. PL study indicates reduction in intensity was due to reduced recombination of electron hole pair and enhancement of photocatalytic reaction for 30% g-C3N4/Bi2WO6 compare to 20% g-C3N4/Bi2WO6 and 10% g-C3N4/Bi2WO6. EIS analysis report provides evidence for inhibiting the recombination of electron-hole pair. In order to determine the photocatalytic reaction for water purification by these catalysts, organic dyes like methylene blue have been selected as pollutant under visible-light irradiation. Also in addition, nanocomposite could be an asset for antimicrobial activity and photocatalytic dye degradation.