Theses and Dissertations

Date of Award

12-2023

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Chemistry

First Advisor

M Jasim Uddin

Second Advisor

Karen Lozano

Third Advisor

Javier Macossay-Torres

Abstract

Three dimensional (3D) piezoelectric zinc stannate (ZnSnO3) nanoweb arrays are synthesized using a combination of treatment methods deposited in PDMS thin films for electrochemical analysis of its piezoelectric response. Advantages of hydrothermal, molten salt, and solvothermal synthesis methods were leveraged to facilitate several chemical and surface engineering techniques. The combination of these treatments reduce the size of zinc stannate to approximately ~40nm-80nm weblike networks, much smaller than previously reported ZnSnO3 sub-micro cubes. Scanning electron microscopy (SEM) and X-Ray Diffraction (XRD) analysis reveal a mesoporous protonated tristannate (H2Sn3O7) nanoweb template with connecting wirelike strands having diameters ranging from 12-27nm across and pores up to 50nm in diameter, in situ. Subsequent solvothermal treatment produces the perovskite nanoweb in a mixed solvent solution of optimal dielectric conditions found to be 80% ethanol and 20% water for maximum Zn2+ deposition. ZnSnO3 nanowebs were deposited in PDMS thin films and used as a piezoelectric nanogenerator (PENG) to characterize its electrochemical properties. Comparative voltage analysis of PDMS films made with weight percentages of (0%, 1%, 5%, 10%, 15% and 20%) zinc stannate sub-microcubes and nanowebs morphologies were done using an oscilloscope. These tests reveal an increased voltage output for the zinc stannate nanoweb morphology with the 10% ZnSnO3-PDMS having the best performance in all variations of testing. The combination of these synthesis methods forming 3D zinc stannate nanoweb arrays could have far-reaching implications in producing other metal oxides when approaching the design of perovskite nanomaterials and piezoelectric energy harvesting systems in the coming decade.

Comments

Copyright 2023 Christopher Munoz. All Rights Reserved.

https://go.openathens.net/redirector/utrgv.edu?url=https://www.proquest.com/dissertations-theses/thin-film-piezoelectric-energy-harvesting/docview/2928412741/se-2?accountid=7119

Download

Included in

Chemistry Commons

Share

COinS