Edge-Rich 3D Structuring of Metal Chalcogenide/Graphene with Vertical Nanosheets for Efficient Photocatalytic Hydrogen Production

被引:4
|
作者
Seo, Dong-Bum [1 ]
Kwon, Yeong Min [1 ]
Kim, Jin [2 ]
Kang, Saewon [1 ]
Yim, Soonmin [1 ]
Lee, Sun Sook [1 ]
Kim, Eui-Tae [3 ]
Song, Wooseok [1 ,4 ]
An, Ki-Seok [1 ]
机构
[1] Korea Res Inst Chem Technol KRICT, Thin Film Mat Res Ctr, Daejeon 34114, South Korea
[2] Hanbat Natl Univ, Dept Mat Sci & Engn, Daejeon 34158, South Korea
[3] Chungnam Natl Univ, Dept Mat Sci & Engn, Daejeon 34134, South Korea
[4] Sungkyunkwan Univ, Sch Elect & Elect Engn, Suwon 16149, South Korea
基金
新加坡国家研究基金会;
关键词
MoS2; WS2; 3D graphenenetwork; photocatalysis; hydrogen production; nanosheets; HYBRID STRUCTURES; MOS2; EVOLUTION; HETEROSTRUCTURES; FABRICATION; GENERATION; NETWORKS; SCALE; PH; SI;
D O I
10.1021/acsami.4c04329
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Constructing pertinent nanoarchitecture with abundant exposed active sites is a valid strategy for boosting photocatalytic hydrogen generation. However, the controllable approach of an ideal architecture comprising vertically standing transition metal chalcogenides (TMDs) nanosheets on a 3D graphene network remains challenging despite the potential for efficient photocatalytic hydrogen production. In this study, we fabricated edge-rich 3D structuring photocatalysts involving vertically grown TMDs nanosheets on a 3D porous graphene framework (referred to as 3D Gr). 2D TMDs (MoS2 and WS2)/3D Gr heterostructures were produced by location-specific photon-pen writing and metal-organic chemical vapor deposition for maximum edge site exposure enabling efficient photocatalytic reactivity. Vertically aligned 2D Mo(W)S2/3D Gr heterostructures exhibited distinctly boosted hydrogen production because of the 3D Gr caused by synergetic impacts associated with the large specific surface area and improved density of exposed active sites in vertically standing Mo(W)S2. The heterostructure involving graphene and TMDs corroborates an optimum charge transport pathway to rapidly separate the photogenerated electron-hole pairs, allowing more electrons to contribute to the photocatalytic hydrogen generation reaction. Consequently, the size-tailored heterostructure showed a superior hydrogen generation rate of 6.51 mmol g-1 h-1 for MoS2/3D graphene and 7.26 mmol g-1 h-1 for WS2/3D graphene, respectively, which were 3.59 and 3.76 times greater than that of MoS2 and WS2 samples. This study offers a promising path for the potential of 3D structuring of vertical TMDs/graphene heterostructure with edge-rich nanosheets for photocatalytic applications.
引用
收藏
页码:28613 / 28624
页数:12
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