Campus Units
Chemistry, Electrical and Computer Engineering, Materials Science and Engineering, Ames Laboratory, Microelectronics Research Center (MRC)
Document Type
Article
Publication Version
Submitted Manuscript
Publication Date
8-17-2020
Journal or Book Title
ACS Materials Letters
Volume
2
Issue
9
First Page
1211
Last Page
1217
DOI
10.1021/acsmaterialslett.0c00251
Abstract
Mixed bandgap and bandgap tunability in semiconductors is critical in expanding their use. Composition alterations through single-crystal epitaxial growth and the formation of multilayer tandem structures are often employed to achieve mixed bandgaps, albeit with limited tunability. Herein, self-assembled one-dimensional coordination polymers provide facile synthons and templates for graphitic C-doped mesoporous oxides, gC-β-Ga2O3 or gC-In2O3 via controlled oxidative ligand ablation. These materials have mixed bandgaps and colors, depending on amount of gC present. The carbon/oxide interface leads to induced gap states, hence, a stoichiometrically tunable band structure. Structurally, a multiscale porous network percolating throughout the material is realized. The nature of the heat treatment and the top-down process allows for facile tunability and the formation of mixed bandgap metal oxides through controlled carbon deposition. As a proof of concept, gC-β-Ga2O3 was utilized as a photocatalyst for CO2 reduction, which demonstrated excellent conversion rates into CH4 and CO.
Copyright Owner
American Chemical Society
Copyright Date
2020
Language
en
File Format
application/pdf
Recommended Citation
Chang, Boyce S.; Martin, Andrew; Thomas, Brijith; Li, Ang; Dorn, Rick W.; Gong, Jinlong; Rossini, Aaron J.; and Thuo, Martin M., "Synthesis of Interface-Driven Tunable Bandgap Metal Oxides" (2020). Chemistry Publications. 1253.
https://lib.dr.iastate.edu/chem_pubs/1253
Comments
This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in ACS Materials Letters, copyright © American Chemical Society after peer review. To access the final edited and published work see DOI: 10.1021/acsmaterialslett.0c00251. Posted with permission.