具多維度結構之石墨烯材料於光催化之應用

Graphene Nanomaterials with Various Dimensional Structures for Photocatalysis Applications

近年來，具二維(two-dimensional, 2D)結構之石墨烯(graphene)因其在光學、電性、物性、化性與機械特性等多面向展現許多獨特且優異的性能而備受矚目，在科學應用上具有巨大的價值和潛力。其中，石墨烯的高導電率、高化學穩定性，巨大的比表面積，及其多樣且可調的結構，使得石墨烯成為光催化反應(photocatalysis reaction)中理想的輔助觸媒(co-catalyst)。由於石墨烯於應用端的性能與其結構密切相關，相關研究因此致力於設計和製造多樣化結構的石墨烯材料。文獻報導中，具特製結構的石墨烯材料，如：零維石墨烯量子點(zero-dimensional graphene quantum dots, 0D-GQDs)、一維石墨烯奈米帶(one-dimensional graphene nanoribbons, 1D-GNRs)和三維石墨烯框架(three-dimensional graphene frameworks, 3D-GFs)，皆能有效提升其光催化性能。本文將簡述光催化反應機制(註：以光催化還原二氧化碳反應為例)、石墨稀在光催化反應中扮演的角色以及石墨烯材料的結構多樣性、可調性。

In recent years, graphene has rapidly emerged as a unique two-dimensional nanosheet, which has great application value and potential in materials science. Due to its high electrical conductivity, strong chemical stability, huge specific surface area, and its diverse and tunable structure, graphene has been recognized as an ideal co-catalyst for optimizing the performance of photocatalysts in photocatalysis reactions. Given that the above-mentioned properties of graphene and its performance on various applications are closely related to its structure, people are therefore devoted to designing and fabricating diverse stone-milled structures. Tailored graphene materials (GMs), such as zero-dimensional graphene quantum dots (0D-GQDs), one-dimensional graphene nanoribbons (1D-GNRs), and three-dimensional graphene frameworks (3D-GFs), can efficiently enhance the photocatalytic performance. This report provides a brief introduction on the mechanism of photocatalysis reaction (e.g., photocatalysis of CO2 reduction), the role of graphene in photocatalysis, and the structural diversity and tunability of GMs.