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author:

Zhang, Lulu (Zhang, Lulu.) [1] | He, Jingxuan (He, Jingxuan.) [2] | Li, Na (Li, Na.) [3] | Yuan, Jie (Yuan, Jie.) [4] | Li, Wenjuan (Li, Wenjuan.) [5] | Liu, Ping (Liu, Ping.) [6] (Scholars:刘平) | Yan, Tingjiang (Yan, Tingjiang.) [7]

Indexed by:

EI Scopus SCIE

Abstract:

Turning the carrier dynamics in heterojunction photocatalysts is a direct and effective strategy for improving the solar energy conversion efficiency of photocatalysts. Herein, we report a ternary CdS@MoS2-Co3O4 multiheterojunction photocatalyst consisting of the p-n junction of MoS2-Co3O4 and the type-I junction of CdS@MoS2, wherein MoS2 located at the frontier between CdS and Co3O4 acts as an intermediate bridge. The type-I junction allows the directional transfer of photoinduced charge from CdS to MoS2, suppressing the photocorrosion of CdS. Notably, the single-particle photoluminescence technique demonstrates the sequential one-direction hole transfer from MoS2 to Co3O4 aroused by the p-n junction, resulting in a long-lifetime charge separation in the carrier lifetime (54-58 ns). Compared to the bare CdS and type-I CdS@MoS2, the CdS@MoS2-Co3O4 photocatalyst affords a 347-fold and 3.5-fold enhancement of the H-2 evolution rate, a quantum efficiency of 28.6% at 450 nm, and a 20 h of long-term stability. This work provides a new understanding of the rational regulation of the charge-transfer mechanism of type-I systems by constructing multiheterojunction photocatalysts.

Keyword:

CdS@MoS2 charge-transfer mechanism H-2 evolution MoS2-Co3O4 multiheterojunction

Community:

  • [ 1 ] [Zhang, Lulu]Qufu Normal Univ, Key Lab Catalyt Convers & Clean Energy Univ Shando, Sch Chem & Chem Engn, Qufu 273165, Shandong, Peoples R China
  • [ 2 ] [He, Jingxuan]Qufu Normal Univ, Key Lab Catalyt Convers & Clean Energy Univ Shando, Sch Chem & Chem Engn, Qufu 273165, Shandong, Peoples R China
  • [ 3 ] [Li, Na]Qufu Normal Univ, Key Lab Catalyt Convers & Clean Energy Univ Shando, Sch Chem & Chem Engn, Qufu 273165, Shandong, Peoples R China
  • [ 4 ] [Li, Wenjuan]Qufu Normal Univ, Key Lab Catalyt Convers & Clean Energy Univ Shando, Sch Chem & Chem Engn, Qufu 273165, Shandong, Peoples R China
  • [ 5 ] [Yan, Tingjiang]Qufu Normal Univ, Key Lab Catalyt Convers & Clean Energy Univ Shando, Sch Chem & Chem Engn, Qufu 273165, Shandong, Peoples R China
  • [ 6 ] [Yuan, Jie]Fuzhou Univ, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350116, Peoples R China
  • [ 7 ] [Liu, Ping]Fuzhou Univ, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350116, Peoples R China

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Source :

ACS APPLIED MATERIALS & INTERFACES

ISSN: 1944-8244

Year: 2023

Issue: 37

Volume: 15

Page: 43790-43798

8 . 5

JCR@2023

8 . 5 0 0

JCR@2023

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 10

SCOPUS Cited Count: 11

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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