Synergy of yolk-shelled structure and tunable oxygen defect over CdS/CdCO3-CoS2: Wide band-gap semiconductors assist in efficient visible-light-driven H2 production and CO2 reduction

Zhang，Siyi1; Du，Shiwen2; Wang，Yumin1; Han，Ziwu1; Li，Xu1; Li，Guojun1; Hu，Qing1; Xu，Hu3; He，Chunqing1; Fang，Pengfei1

2023-02-15

10.1016/j.cej.2022.140113

CHEMICAL ENGINEERING JOURNAL   Impact Factor & Quartile

1385-8947

1873-3212

Yolk-shelled CoS nanospheres are designed through Kirkendall Effect and subsequently converted into defect-rich CdS/CdCO-CoS photocatalysts via in-situ growth method. The optimal CdS/CdCO-CoS exhibits a significant hydrogen evolution rate of 64867.88 μmol h g that is 3.23 and 49.45 folds higher than CoS-CdS and pure CdS. CO reduction rate of CdS/CdCO-CoS is detected additionally (654.7 μmol h g). Yolk-shelled CdS/CdCO-CoS induces the multi-scattering of incident light, possessing 1.52-fold H production rate than that of full hollow ones. Enhanced photoexcited-carriers migration efficiency is attributed to the synergistic effect between possible Mie resonance at about λ = 450 nm in yolk-shelled architecture based on Mie's theory and monochromatic light HER test, and the formation of defect energy level within the wide-band gap of CdCO in Schottky-type/type II heterojunction. Electron paramagnetic resonance, positron annihilation spectroscopy and density functional theory calculation etc. are employed to validate the presence of oxygen vacancies and the photocatalytic mechanism.

Hydrogen production Mie resonance Oxygen vacancies Yolk-shelled CoS2

EI ; SCI

English

Others

National Outstanding Youth Science Fund Project of National Natural Science Foundation of China[12275201];

Engineering

Engineering, Environmental ; Engineering, Chemical

WOS:000894631900005

ELSEVIER SCIENCE SA

20224513091886

Cadmium sulfide ; Carbon dioxide ; Defect states ; Density functional theory ; Electron spin resonance spectroscopy ; Heterojunctions ; II-VI semiconductors ; Incident light ; Oxygen vacancies ; Paramagnetic resonance

Gas Fuels:522 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Semiconducting Materials:712.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Chemistry:801 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Probability Theory:922.1 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4 ; Crystalline Solids:933.1

ENGINEERING

2-s2.0-85141439423

Scopus

1.School of Physics and Technology,Key Laboratory of Nuclear Solid State Physics Hubei Province,Wuhan University,Wuhan,430072,China
2.State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian,116023,China
3.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China

Zhang，Siyi,Du，Shiwen,Wang，Yumin,et al. Synergy of yolk-shelled structure and tunable oxygen defect over CdS/CdCO3-CoS2: Wide band-gap semiconductors assist in efficient visible-light-driven H2 production and CO2 reduction[J]. CHEMICAL ENGINEERING JOURNAL,2023,454.

Zhang，Siyi.,Du，Shiwen.,Wang，Yumin.,Han，Ziwu.,Li，Xu.,...&Fang，Pengfei.(2023).Synergy of yolk-shelled structure and tunable oxygen defect over CdS/CdCO3-CoS2: Wide band-gap semiconductors assist in efficient visible-light-driven H2 production and CO2 reduction.CHEMICAL ENGINEERING JOURNAL,454.

Zhang，Siyi,et al."Synergy of yolk-shelled structure and tunable oxygen defect over CdS/CdCO3-CoS2: Wide band-gap semiconductors assist in efficient visible-light-driven H2 production and CO2 reduction".CHEMICAL ENGINEERING JOURNAL 454(2023).