A Bifunctional 2D Interlayered β-Cu2V2O7/Zn2V2O6 (CZVO) Heterojunction for Solar-Driven Nonsacrificial Dye Degradation and Water Oxidation

Muhammad Ashraf, Ibrahim Khan, Nadeem Baig, Abdulmajeed H. Hendi, Muhammad Fahad Ehsan, Nafeesa Sarfraz

Research output: Journal PublicationArticlepeer-review

26 Citations (Scopus)

Abstract

Investigating novel materials with controlled morphology for solar-driven conversions is the foremost research emphasis in applied sciences. In continuation of those efforts, we report the unique synthesis of a novel trimetallic β-Cu2V2O7/Zn2V2O6 (CZVO) hybrid with controlled morphology. The trimetallic CZVO demonstrates a bifunctional, non-sacrificial photoresponse in the cases of 1) photocatalytic degradation using methylene blue (MB) as a model dye; and 2) photoelectrochemical (PEC) water oxidation. The X-ray photoelectron spectroscopy (XPS) analysis of CZVO confirmed Type-(I) heterojunction formation between β-Cu2V2O7 (CVO) and Zn2V2O6 (ZVO). After visible light exposure (65 min), CZVO-opt (1 wt% CVO: 5 wt% ZVO) demonstrated the highest photodegradation, while the CZVO-opt photoanode delivered the highest photocurrent density (I ph) of 1.78 mA cm−2 at 1.23 VRHE, almost 3.11 and 1.55 times more than CVO (I ph = 0.57 mA cm−2) and ZVO (I ph = 1.15 mA cm−2) photoanodes, respectively. The CZVO-opt photoanode harvested the most solar energy in terms of incident photon to current conversion efficiency (IPCE320 nm = 37.93%). The significant improvement in the CZVO-opt performance can be attributed to the firm contact and uniform distribution of ZVO NPs over CVO interlayered nanosheets, which leads to adequate solar absorption and facile charge transport through a Type-(I) heterojunction with suppresses charge recombination.

Original languageEnglish
Article number2100034
JournalEnergy Technology
Volume9
Issue number7
DOIs
Publication statusPublished - Jul 2021
Externally publishedYes

Keywords

  • bifunctionals
  • copper vanadate
  • metal vanadate
  • methylene blue dye degradation
  • photoelectrochemical water oxidation
  • zinc vanadate

ASJC Scopus subject areas

  • General Energy

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