Increasing the photocatalytic efficiency of ZnWO$_4$ by synthesizing a Bi$_2$WO$_6$/ZnWO$_4$ composite photocatalyst

Kumar, Praveen (avtor), Verma, Shilpi (avtor), Čelan Korošin, Nataša (avtor), Žener, Boštjan (avtor), Lavrenčič Štangar, Urška (avtor)

In the present study, a Bi$_2$WO$_6$/ZnWO$_4$ photocatalyst was successfully constructed by a modified hydrothermal synthesis method with different molar concentrations of Bi$_2$WO$_6$ with respect to ZnWO$_4$. The variation in molar concentrations of Bi$_2$WO$_6$ changed the photocatalytic properties of the Bi$_2$WO$_6$/ZnWO$_4$ catalyst. The synthesized Bi$_2$WO$_6$/ZnWO$_4$ photocatalyst was characterized by various techniques to decipher its structural and spectral properties. The interaction of Bi$^{2+}$ ionic charge carriers and many-body effects cause the band gap to narrow in Bi$_2$WO$_6$/ZnWO$_4$, as shown by PL analysis. The decrease in band gap energies (E$_g$) from 4.7 eV (ZnWO$_4$) to 3.5 eV (30% Bi$_2$WO$_6$/ZnWO$_4$) is beneficial because less energy is required to excite the valence electrons. The maximum degradation of Plasmocorinth B dye was found with 30% Bi$_2$WO$_6$/ZnWO$_4$ under UV irradiation. This increased activity of 30% Bi$_2$WO$_6$/ZnWO$_4$ can be attributed to the (i) synergistic effect in the bicrystalline framework of Bi$_2$WO$_6$ and ZnWO$_4$, (ii) the high close contact between Bi$_2$WO$_6$ and ZnWO$_4$, and (iii) the small crystallite size. The photocatalytic activity of synthesized Bi$_2$WO$_6$/ZnWO$_4$ photocatalyst shows its significant potential in water/ wastewater treatment application.

• Jezik: Angleški jezik
• Ključne besede: composite photocatalyst, semi-conductivity, tungstate, Plasmocorinth B, band gap, Bi$_2$WO$_6$/ZnWO$_4$ composite photocatalyst
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2022
• Št. strani: Str. 278-285
• Številčenje: Vol. 397/399
• PID: 20.500.12556/RUL-138857
• UDK: 546.78:544.526.5
• ISSN pri članku: 0920-5861
• DOI: 10.1016/j.cattod.2021.09.012
• COBISS.SI-ID: 77732099
• Datum objave v RUL: 23.08.2022

Gradivo je del revije

• Naslov: Catalysis today
• Skrajšan naslov: Catal. today
• Založnik: Elsevier
• ISSN: 0920-5861
• COBISS.SI-ID: 15324421

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: kompozitni fotokatalizatorji, polprevodniki, volfram