Photo-induced synthesis of nanostructured Pt-on-Au/g-C 3 N 4 composites for visible light photocatalytic hydrogen produc
- PDF / 3,505,903 Bytes
- 14 Pages / 595.276 x 790.866 pts Page_size
- 79 Downloads / 249 Views
Photo-induced synthesis of nanostructured Pt-on-Au/g-C3N4 composites for visible light photocatalytic hydrogen production Yanting Tang1 Jingjing Zhao1
, Jielin Huang1 , Manxiang Jiang1 , Jinpeng Yu1 , Juan Li1 , Xin Yu1,2,* , and Junwei Zhao2,*
, Qi Wang1
,
1
Henan Engineering Research Center of Resource and Energy Recovery from Waste, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, People’s Republic of China 2 Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, People’s Republic of China
Received: 22 April 2020
ABSTRACT
Accepted: 17 August 2020
Nanostructured semiconductor composites are often considered as types of promising photocatalysts and display great prospects in visible light photocatalytic hydrogen production. In this work, nanostructured Pt-on-Au/PCN composites were synthesized by photo-induced synthesis strategy with exfoliated g-C3N4 (PCN) nanosheets as starting materials and served in visible light photocatalytic hydrogen production. The prepared Pt-on-Au/PCN composites showed enhanced visible light absorption and photocatalytic hydrogen production performance. The visible light photocatalytic performance of Pt-on-Au/ PCN composites is approximately 54.60 times of pristine g-C3N4 and 3.61 times of Pt/g-C3N4 composites, respectively. These findings could be mainly attributed to the formation of bimetal Pt-on-Au nanostructure for visible light harvesting and charge separation. Besides, possible photocatalytic mechanism of nanostructured Pt-on-Au/PCN composites for hydrogen production is proposed in detail. Current work also offers a new method to design and synthesize other types of metal-on-metal nanostructures for efficient semiconductor photocatalysis.
Ó
Springer Science+Business
Media, LLC, part of Springer Nature 2020
Handling Editor: Catalin Croitoru. Yanting Tang and Jielin Huang have contributed equally to this work.
Address correspondence to E-mail: [email protected]; [email protected]
https://doi.org/10.1007/s10853-020-05120-5
J Mater Sci
Introduction Metal-free polymeric semiconductor, such as graphitic carbon nitride (g-C3N4), is widely investigated nowadays and shows great potential in photocatalytic hydrogen production due to their appropriate electronic structure and unique physical properties [1, 2]. Nevertheless, the relatively strong recombination of photogenerated electrons and holes largely restricts the wide utilization of g-C3N4 [3]. And thus, some modifications of g-C3N4 are carried out for extending solar light harvesting and improving charge separation, such as chemical exfoliation [4], doping [5], and carbon (nitrogen) defects [6]. Apart from these strategies, the fabrication of plasmonic g-C3N4-based composites is another efficient way for broadband light absorption and enhanced charge separation. Thus, plasmonic g-C3N4-based composites are still desired for enhanced visible light photocatalytic
Data Loading...
