Bio-inspired Z-scheme g-C3N4/Ag2CrO4 for efficient visible-light photocatalytic hydrogen generation

被引：64

作者：

Che, Yuping ^{[1
,2
]}

Lu, Bingxin ^{[1
,2
]}

Qi, Qi ^{[1
,2
]}

Chang, Huaiqiu ^{[4
]}

Zhai, Jin ^{[1
,2
]}

Wang, Kefeng ^{[3
]}

Liu, Zhaoyue ^{[1
,2
]}

机构：

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

[2] Beihang Univ, Sch Chem, Beijing Adv Innovat Ctr Biomed Engn, Beijing Key Lab Bioinspired Energy Mat & Devices, Beijing 100191, Peoples R China

[3] Shangqiu Normal Univ, Henan Key Lab Biomol Recognit & Sensing, Shangqiu 476000, Peoples R China

[4] Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China

来源：

SCIENTIFIC REPORTS | 2018年 / 8卷

基金：

中国国家自然科学基金;

关键词：

COMPOSITE PHOTOCATALYSTS; ARTIFICIAL PHOTOSYNTHESIS; DRIVEN PHOTOCATALYSTS; FACILE FABRICATION; H-2; EVOLUTION; WATER; DEGRADATION; HETEROJUNCTION; NANOCOMPOSITES; PERFORMANCE;

D O I：

10.1038/s41598-018-34287-w

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Due to low charge separation efficiency and poor stability, it is usually difficult for single-component photocatalysts such as graphitic carbon nitride (g-C3N4) and silver chromate (Ag2CrO4) to fulfill photocatalytic hydrogen production efficiently. Z-scheme charge transport mechanism that mimics the photosynthesis in nature is an effective way to solve the above problems. Inspired by photosynthesis, we report Ag2CrO4 nanoparticles-decorated g-C3N4 nanosheet as an efficient photocatalyst for hydrogen evolution reaction (HER) with methanol as sacrificial agent. The formation of Z-scheme g-C3N4/Ag2CrO4 nanosheets photocatalysts could inhibit the recombination of photogenerated electron-hole pairs, promote the generation of hydrogen by photosplitting of water. The experiment results indicate that g-C3N4/Ag2CrO4 nanocomposites present enhanced photocatalytic activity and stability in the H-2 evolution of water splitting. And the nanocomposites g-C3N4/Ag2CrO4(23.1%) show the 14 times HER efficiency compared to that of bare g-C3N4.

引用

页数：12