Enhanced visible-light-driven photocatalytic hydrogen generation using NiCo2S4/CdS nanocomposites

Li, Chunhe1,2; Du, Shiwen1,2; Wang, Hongmei3; Naghadeh, Sara Bonabi4; Allen, A'Lester4; Lin, Xiao1,2; Li, Guojun1,2; Liu, Yong1,2; Xu, Hu5; He, Chunqing1,2; Zhang, Jin Zhong4; Fang, Pengfei1,2

2019-12-15

10.1016/j.cej.2019.122089

CHEMICAL ENGINEERING JOURNAL   影响因子和分区

1385-8947

1873-3212

One-dimensional NiCo2S4/CdS nanocomposites are constructed using a two-step hydrothermal method and used for photocatalytic hydrogen generation with visible light. The nanocomposites are characterized using a combination of techniques including X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), positron annihilation lifetime measurement, spectroscopy techniques, and femtosecond transient absorption (TA) spectroscopy. In comparison to bare CdS NWs, the NiCo2S4/CdS nanocomposites exhibit enhanced visible light hydrogen production, with an optimal rate reaching 20.0 mmol.h(-1).g(-1). The experimental results, in conjunction with theoretical electronic structure calculations, reveal that the enhanced hydrogen evolution reaction activities can be attributed to the formation of Schottky junction between NiCo2S4 NPs and CdS NWs that facilitates photogenerated electron transfer from CdS to NiCo2S4. Meanwhile, the NiCo2S4, as a metallic cocatalyst, increases the electron density and active sites desired for H-2 evolution.

NiCo2S4/CdS heterojunctions Metallic cocatalyst Interfacial charge transfer Photocatalytic hydrogen evolution

SCI ; EI

英语

其他

NASA through MACES[NNX15AQ01A]

Engineering

Engineering, Environmental ; Engineering, Chemical

WOS:000487764800031

ELSEVIER SCIENCE SA

20192707141493

Cadmium sulfide ; CdS nanoparticles ; Charge transfer ; Electronic structure ; Electrons ; Energy dispersive spectroscopy ; Heterojunctions ; High resolution transmission electron microscopy ; II-VI semiconductors ; Light ; Nanocomposites ; Nickel compounds ; Photocatalytic activity ; Scanning electron microscopy ; X ray photoelectron spectroscopy

Gas Fuels:522 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Optical Devices and Systems:741.3 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Chemical Products Generally:804 ; Solid State Physics:933

ENGINEERING

Web of Science

1.Wuhan Univ, Dept Phys, Wuhan 430072, Hubei, Peoples R China
2.Wuhan Univ, Hubei Nucl Solid Key Lab, Wuhan 430072, Hubei, Peoples R China
3.Jiaxing Univ, Coll Biol Chem Sci & Engn, Jiaxing 314001, Peoples R China
4.Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95064 USA
5.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China

Li, Chunhe,Du, Shiwen,Wang, Hongmei,et al. Enhanced visible-light-driven photocatalytic hydrogen generation using NiCo2S4/CdS nanocomposites[J]. CHEMICAL ENGINEERING JOURNAL,2019,378.

Li, Chunhe.,Du, Shiwen.,Wang, Hongmei.,Naghadeh, Sara Bonabi.,Allen, A'Lester.,...&Fang, Pengfei.(2019).Enhanced visible-light-driven photocatalytic hydrogen generation using NiCo2S4/CdS nanocomposites.CHEMICAL ENGINEERING JOURNAL,378.

Li, Chunhe,et al."Enhanced visible-light-driven photocatalytic hydrogen generation using NiCo2S4/CdS nanocomposites".CHEMICAL ENGINEERING JOURNAL 378(2019).