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author:

Wang, Yingshu (Wang, Yingshu.) [1] (Scholars:王莹淑) | Wang, Shuyue (Wang, Shuyue.) [2] | Gan, Jiasi (Gan, Jiasi.) [3] | Shen, Jinni (Shen, Jinni.) [4] (Scholars:沈锦妮) | Zhang, Zizhong (Zhang, Zizhong.) [5] (Scholars:张子重) | Zheng, Huidong (Zheng, Huidong.) [6] (Scholars:郑辉东) | Wang, Xuxu (Wang, Xuxu.) [7] (Scholars:王绪绪)

Indexed by:

EI Scopus SCIE

Abstract:

One-pot synthesis of urea [(NH2)(2)CO] from easily available small molecules, that is, N-2, CO2, and H2O, is an extremely attractive but very challenging reaction. 2D-CdS@3D-BiOBr composites with S-scheme heterojunctions are constructed via a facile hydrothermal technique followed by a self-assembly method and shown to be an excellent photocatalyst enabling the reduction of N-2 and CO2 with H2O to (NH2)(2)CO under visible light. The optimal 40%2D-CdS@3D-BiOBr sample shows up to 15 mu mol.g(-1).h(-1) total yield of NH3 and (NH2)(2)CO, of which (NH2)(2)CO accounts for 54%. The apparent quantum efficiency (AQE) is 3.93% for urea production. On the photocatalyst, urea is speculated to form by two possible chemical routes. One is direct photocatalytic synthesis. Both N-2 and CO2 molecules are activated by the Cd2+ ion of 2D-CdS and the oxygen defect of 3D-BiOBr at the edges of the heterojunction interface of 2D-CdS/3D-BiOBr, respectively. *HNCONH* is the key intermediate of the formation of (NH2)(2)CO molecules. The other is indirect synthesis by photocatalysis and then thermocatalysis. N-2 is reduced into NH3 and CO2 is reduced into CO on 2D-CdS by the photogenerated electrons and protons, and then the formed NH3 reacts with the reactant CO2 or the product CO to form (NH2)(2)CO by thermocatalysis on 2D-CdS. The former is dominant for urea synthesis. The work confirms that urea could be synthesized photocatalytically from cheap N-2, CO2, and H2O under visible light. A composite heterojunction semiconductor could be a prospective photocatalyst appropriate for the complex reaction.

Keyword:

carbon dioxide CdS@BiOBr composite nitrogen photocatalysis urea synthesis

Community:

  • [ 1 ] [Wang, Yingshu]Fuzhou Univ, Coll Chem Engn, Fuzhou 350108, Peoples R China
  • [ 2 ] [Wang, Shuyue]Fuzhou Univ, Coll Chem Engn, Fuzhou 350108, Peoples R China
  • [ 3 ] [Gan, Jiasi]Fuzhou Univ, Coll Chem Engn, Fuzhou 350108, Peoples R China
  • [ 4 ] [Zheng, Huidong]Fuzhou Univ, Coll Chem Engn, Fuzhou 350108, Peoples R China
  • [ 5 ] [Shen, Jinni]Fuzhou Univ, State Key Lab Photocatalysis Energy & Environm, Coll Chem, Fuzhou 350108, Peoples R China
  • [ 6 ] [Zhang, Zizhong]Fuzhou Univ, State Key Lab Photocatalysis Energy & Environm, Coll Chem, Fuzhou 350108, Peoples R China
  • [ 7 ] [Wang, Xuxu]Fuzhou Univ, State Key Lab Photocatalysis Energy & Environm, Coll Chem, Fuzhou 350108, Peoples R China

Reprint 's Address:

  • [Wang, Yingshu]Fuzhou Univ, Coll Chem Engn, Fuzhou 350108, Peoples R China;;[Zheng, Huidong]Fuzhou Univ, Coll Chem Engn, Fuzhou 350108, Peoples R China;;[Wang, Xuxu]Fuzhou Univ, State Key Lab Photocatalysis Energy & Environm, Coll Chem, Fuzhou 350108, Peoples R China;;

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Source :

ACS SUSTAINABLE CHEMISTRY & ENGINEERING

ISSN: 2168-0485

Year: 2023

Issue: 5

Volume: 11

Page: 1962-1973

7 . 1

JCR@2023

7 . 1 0 0

JCR@2023

ESI Discipline: CHEMISTRY;

ESI HC Threshold:39

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 15

SCOPUS Cited Count: 13

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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