Construction of Z-scheme photocatalyst with p-n heterojunction of molecular semiconductors for enhanced photocatalytic water oxidation

被引：25

作者：

Li, Junqiang ^{[1
,2
,3
,4
,5
]}

Wang, Shoufeng ^{[1
,2
,3
,4
,5
]}

Li, Renfu ^{[1
,2
]}

Zhang, Bo ^{[1
,2
,3
,4
,5
]}

Xu, Xiao ^{[1
,2
,3
,4
]}

Wang, Zhuoyue ^{[1
,2
,3
,4
,5
]}

Kang, Longtian ^{[1
,2
,3
,4
,6
]}

机构：

[1] Chinese Acad Sci, Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Fujian, Peoples R China

[2] Chinese Acad Sci, Fujian Inst Res Struct Matter, Fujian Prov Key Lab Nanomat, Fuzhou 350002, Fujian, Peoples R China

[3] Fujian Sci & Technol Innovat Lab Optoelect Informa, Fuzhou 350108, Fujian, Peoples R China

[4] Univ Chinese Acad Sci, Fujian Coll, Fuzhou 350002, Peoples R China

[5] Fuzhou Univ, Coll Chem, Fuzhou 350116, Peoples R China

[6] Chinese Acad Sci, Fujian Inst Res Struct Matter, Fuzhou 350002, Fujian, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2024年 / 342卷

关键词：

Perylene-34,9,10-tetracarboxylic dianhydride; Cobalt phthalocyanine; Molecular semiconductor; P/N type heterojunction; Z-Scheme heterojunction; Photocatalytic water oxidation; COBALT PHTHALOCYANINE; EFFICIENT; EVOLUTION; STATE; OXIDE;

D O I：

10.1016/j.apcatb.2023.123381

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Here, the donor-acceptor organic composites of n-type perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) and p-type cobalt phthalocyanine (CoPc) semiconductors are firstly synthesized and optimized for photocatalytic oxygen evolution (POE) as catalyst. The POE rate of 12.30 mmol & sdot;g-( 1)& sdot;h(-1) with the apparent quantum yield of 4.00 % at 475 nm can be achieved under visible light (> 420 nm), as compared with 1.58 mmol.g(-1).h(-1) of PTCDA. Under the full UV-Vis light (> 320 nm), the rate is up to 17.65 mmol & sdot;g(- 1)& sdot;h(-1). The systematical ex-periments clearly reveal the generation of dual-channel energy transfer of fluorescence resonance from CoPc to PTCDA and electron transfer from oxygen groups in PTCDA to Co atom in CoPc under UV-Vis light irradiation. Consequently, the formation of Z-scheme p/n heterojunction in CoPc/PTCDA composite greatly enhances the POE performance due to the lifetime increase of metal-ligand charge transfer exciton in CoPc (44.83 vs. 2.95 ps) and perylene cationic exciton (20.13 vs. 2.13 ps).

引用

页数：12

共 65 条

[41] HOMO/LUMO alignment at PTCDA/ZnPc and PTCDA/ClInPc heterointerfaces determined by combined UPS and XPS measurements [J].