Journal
ADVANCED SUSTAINABLE SYSTEMS
Volume 5, Issue 2, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsu.202000189
Keywords
2D ZnO; energy harvesting; self-assembly; water cleaning; wurtzene
Funding
- CSIR, Govt. of India [03(1472)/19/EMR-II]
- AOARD grant [FA2386-19-1-4039]
- Ramanujan fellowship
- CoE (TEQIP-III)
- NIT Durgapur
- Govt. of India
- CSIR, Govt. of India
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Recent attention has been focused on synthesizing few-layered piezocatalysts from nonlayered materials, with potential applicability in efficient removal of toxic elements from water. Through a wet-chemical synthesis method, atomically thin wurtzite ZnO was produced, enhancing catalytic activity and enabling fabrication of a piezoelectric power cell. The presence of well-distributed surface defects in the synthesized wurtzite promotes excellent piezo-photocatalytic activity and efficiency in degrading a test dye.
Syntheses of few-layered piezocatalysts from nonlayered materials have gained a huge attention of attention in recent years due to their potential applicability in efficient removal of toxic elements from water. Here, a simple scalable bottom up approach consisting of wet-chemical synthesis method is used to produce the atomically thin (2D)-wurtzite ZnO: wurtzene. The presence of a large number of well-distributed surface defects in the synthesized wurtzene promotes the separation of charge carriers in it via the excellent piezo-photocatalytic activity and thereby the efficiency of degradation of a test dye (namely methylene blue) is enhanced by approximate to 5 times. By taking an innovative approach, a piezoelectric driven power cell is also fabricated by using the wurtzene and the highest open circuit voltage is found out to be approximate to 40 V at 1.0 kPa of applied periodic pressure. The experimental observations are explained with density functional theory calculation. The confinement effect due to reduced dimension plays a crucial role in the wurtzene's excellent piezoelectric response. It is envisioned that the present findings will provided a clear insight into the synthesis of wurtzene with surface defects for highly efficient sunlight driven photocatalytic activity as well as piezoelectric energy harvesting.
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