TY - JOUR
T1 - Synthesis of Interface-Driven Tunable Bandgap Metal Oxides
AU - Chang, Boyce S.
AU - Martin, Andrew
AU - Thomas, Brijith
AU - Li, Ang
AU - Dorn, Rick W.
AU - Gong, Jinlong
AU - Rossini, Aaron J.
AU - Thuo, Martin M.
N1 - Publisher Copyright:
© 2020 American Chemical Society.
PY - 2020/9/8
Y1 - 2020/9/8
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85092161748&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85092161748&partnerID=8YFLogxK
U2 - 10.1021/acsmaterialslett.0c00251
DO - 10.1021/acsmaterialslett.0c00251
M3 - Article
AN - SCOPUS:85092161748
SN - 2639-4979
VL - 2
SP - 1211
EP - 1217
JO - ACS Materials Letters
JF - ACS Materials Letters
IS - 9
ER -