Minimizing Graphene Defects Enhances Titania Nanocomposite-Based Photocatalytic Reduction of CO2 for Improved Solar Fuel Production

被引：463

作者：

Liang, Yu Teng ^{[2
]}

Vijayan, Baiju K. ^{[1
]}

Gray, Kimberly A. ^{[1
]}

Hersam, Mark C. ^{[2
,3
,4
]}

机构：

[1] Northwestern Univ, Dept Civil & Environm Engn, Evanston, IL 60208 USA

[2] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

[3] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

[4] Northwestern Univ, Dept Med, Evanston, IL 60208 USA

来源：

NANO LETTERS | 2011年 / 11卷 / 07期

基金：

美国国家科学基金会;

关键词：

Photocatalysis; graphene; defect; titania; nanocomposite; solar fuel; TIO2-GRAPHENE NANOCOMPOSITES; CARBON-DIOXIDE; OXIDE; EXFOLIATION; SUSPENSIONS;

D O I：

10.1021/nl2012906

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

With its unique electronic and optical properties, graphene is proposed to functionalize and tailor titania photocatalysts for improved reactivity. The two major solution-based pathways for producing graphene, oxidation-reduction and solvent exfoliation, result in nanoplatelets with different defect densities. Herein, we show that nanocomposites based on the less defective solvent-exfoliated graphene exhibit a significantly larger enhancement in CO2 photoreduction, especially under visible light. This counterintuitive result is attributed to their superior electrical mobility, which facilitates the diffusion of photoexcited electrons to reactive sites.

引用

页码：2865 / 2870

页数：6

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