Peroxymonosulfate activation based on Co (9) S- 8 @N -C: A new strategy for highly efficient hydrogen production and synchronous formaldehyde removal in wastewater

Gao，Caiyan1; Feng，Xuezhen2; Yi，Lian1; Wu，Xiaoyong1; Zheng，Renji2; Zhang，Gaoke1; Li，Yubiao1

2022-11-10

10.1016/j.jmst.2022.05.023

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY   Impact Factor & Quartile

1005-0302

1941-1162

Formaldehyde (FA), as an important chemical raw material, has been widely used in many fields. However, the discharge of a large amount of FA-containing wastewater poses a serious threat to the environment and human health. Recently, the in-situ hydrogen energy release technology of hydrogen-containing stable liquid has been extensively explored due to its safe storage. Exploring a robust method to achieve FA removal and synchronous in-situ hydrogen release from FA containing wastewater is of great significant for environmental protection and energy crisis alleviation. Here, we have innovatively introduced peroxymonosulfate (PMS) activation technology into FA removal and hydrogen production simultaneously. The composite of nitrogen doped carbon coating Co 9 S 8 nanotubes (Co 9 S 8 @N ???C) is employed as a proof of concept for FA decomposition and simultaneously hydrogen production based on PMS activation system. As expected, the Co 9 S 8 @N ???C/PMS system presents much superior hydrogen production efficiency and satisfactory FA removal rate towards FA wastewater than those of common catalysis, photocatalysis and Fenton reaction in the basic condition in a wide range of FA concentration. The hydrogen yield reaches a value as high as 471 ??mol within 60 min, corresponding to a FA degradation rate of 30% with an initial FA concentration of 0.722 mol L ???1 . Characterizations and density functional theory (DFT) calculations suggest that the free radical process dominated by superoxide radical (O 2 ??????) and nonradical process dominated by singlet oxygen ( 1 O 2 ), which are induced by Co 9 S 8 @N ???C/PMS system, are responsible for highly efficient hydrogen production via FA degradation. These generated O 2 ??????and 1 O 2 can extract ???H from FA to form ???OOH intermediate, which can further combine with the ???H from water to produce hydrogen. This study provides an applicable technique for environmental purification and new energy development based on FA containing wastewater. ?? 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

Peroxymonosulfate activation Hydrogen evolution Formaldehyde removal Co 9S (8) @N&ndash C

SCI ; EI

English

Others

National Natural Science Foundation of China["21975193","51602237"] ; Fundamental Research Funds for the Central Universities, China[WUT: 2021III034JC]

Materials Science ; Metallurgy & Metallurgical Engineering

Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000830890200001

JOURNAL MATER SCI TECHNOL

20222612269521

Catalysis ; Chemical activation ; Degradation ; Density functional theory ; Doping (additives) ; Energy policy ; Formaldehyde ; Free radicals ; Health risks ; Hydrogen storage ; Oxidation

Health Care:461.7 ; Gas Fuels:522 ; Energy Policy:525.6 ; Chemical Reactions:802.2 ; Chemical Products Generally:804 ; Organic Compounds:804.1 ; Probability Theory:922.1 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4

MATERIALS SCIENCE

2-s2.0-85132532386

Web of Science

1.School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan,430070,China
2.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Gao，Caiyan,Feng，Xuezhen,Yi，Lian,et al. Peroxymonosulfate activation based on Co (9) S- 8 @N -C: A new strategy for highly efficient hydrogen production and synchronous formaldehyde removal in wastewater[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,127:256-267.

Gao，Caiyan.,Feng，Xuezhen.,Yi，Lian.,Wu，Xiaoyong.,Zheng，Renji.,...&Li，Yubiao.(2022).Peroxymonosulfate activation based on Co (9) S- 8 @N -C: A new strategy for highly efficient hydrogen production and synchronous formaldehyde removal in wastewater.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,127,256-267.

Gao，Caiyan,et al."Peroxymonosulfate activation based on Co (9) S- 8 @N -C: A new strategy for highly efficient hydrogen production and synchronous formaldehyde removal in wastewater".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 127(2022):256-267.