Superiority of graphene over carbon analogs for enhanced photocatalytic H2-production activity of ZnIn2S4
Superiority of graphene over carbon analogs for enhanced photocatalytic H2-production activity of ZnIn2S4
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石墨烯在增强 ZnIn2S4 光催化产氢活性方面优于碳类似物
DOI：
10.1016/j.apcatb.2017.01.060
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发表时间：
2017-06-05
影响因子：
22.1
通讯作者：
Li, Mei
中科院分区：
文献类型：
--
作者：
Xia, Yang;Li, Qin;Li, Mei
石墨烯及其衍生物还原氧化石墨烯（RGO）在过去十年中被广泛认为是大多数半导体光催化剂的神奇改性剂。然而，石墨烯相对于其碳类似物的潜在优势很少在相同的实验条件下研究以揭示其独特性。本文系统比较了RGO、碳量子点（CQDs）和碳纳米管（CNTs）对ZnIn 2S 4（ZIS）半导体光催化剂的促进作用。通过性质与光活性的相关性分析，这些碳类似物的主要作用表现出明显的不同。其中，RGO通过控制ZIS的形貌和促进载流子的转移，在提高ZIS光解水制氢活性方面表现出优势。我们的工作揭示了不同碳材料对ZIS半导体的物理化学性质和光催化产氢活性的促进作用，进一步肯定了RGO在构建高效碳-半导体基复合光催化剂方面的优越性。(C)2017爱思唯尔B. V.保留所有权利。
Graphene and its derivative reduced graphene oxide (RGO) have been widely considered to be a miracle modifier for most semiconductor photocatalysts over the past decade. However, the underlying advantage of graphene over its carbon analogs was rarely studied under the same experimental conditions to reveal its uniqueness. In this study, the promotion effect of RGO on ZnIn2S4 (ZIS) semiconductor photocatalyst was systemically compared with that of carbon quantum dots (CQDs) and carbon nanotubes (CNTs). According to the property-photoactivity correlation analysis, the primary roles of these carbon analogs displayed an obvious dissimilarity. Among them, RGO manifested its superiority in enhancing the photoactivity of ZIS for hydrogen production from water splitting via controlling the morphology and boosting the charge carrier transferring. Our work revealed the exact contributions of different carbon materials to the promoted physicochemical properties and photocatalytic H-2-production activity of ZIS semiconductor, and further affirmed the superiority of RGO over its carbon analogs in the construction of high-efficiency carbon-semiconductor based composite photocatalysts. (C) 2017 Elsevier B.V. All rights reserved.