Bioinspired Z-scheme In2O3/C3N4 heterojunctions with tunable nanorod lengths for enhanced photocatalytic hydrogen evolution

被引：43

作者：

Long, Zhiyun ^{[1
,3
]}

Yang, Xiaohang ^{[2
]}

Huo, Xuyang ^{[2
]}

Li, Xuanze ^{[3
]}

Qi, Qiuju ^{[2
]}

Bian, Xingbo ^{[2
]}

Wang, Qiyao ^{[2
]}

Yang, Fengjian ^{[2
]}

Yu, Weilun ^{[2
]}

Jiang, Lei ^{[1
,3
]}

机构：

[1] Beihang Univ, Sch Chem, Minist Educ, Key Lab Bioinspired Smart Interfacial Sci & Techno, Beijing 100191, Peoples R China

[2] Jilin Med Univ, Coll Biomed Engn, Jilin 132013, Peoples R China

[3] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Bioinspired Mat & Interfacial Sci, Beijing 100190, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2023年 / 461卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Z-scheme heterojunction; Tunable length; PhotocatalyticH2; evolution; CONVERSION; NANOSHEETS; CONSTRUCTION; REDUCTION;

D O I：

10.1016/j.cej.2023.141893

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Inspired by natural photosynthesis, Z-scheme heterojunction fabrication has been developed as an effective approach to improve the photocatalytic H2 evolution performance of graphitic carbon nitride (g-C3N4) based photocatalysts. In this work, we fabricated the Z-scheme In2O3 nanorod/C3N4 heterojunction and tailored the length of the In2O3 nanorod, by which the carriers' behavior of the In2O3/C3N4 heterojunctions could be subtly regulated. By employing finite difference time domain simulation and photoelectric characterization, we clari-fied the mechanism of the length-dependent regulation for photoelectric conversion efficiency. Due to the compromise between photoinduced exciton generation, dissociation, and migration as the nanorod length increased, the photoelectric conversion efficiency was maximized at an optimal length (53 nm) of the In2O3 nanorod, and the corresponding maximum H2 evolution rate of Z-scheme In2O3/C3N4 heterojunctions was 12.9 times higher than that of the pristine g-C3N4. This work provides a direct guideline for designing the optimal geometrical configuration of g-C3N4 based heterojunctions.

引用

页数：9

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