Constructing direct Z-scheme heterojunctions of defective MoS2-v on carbon nitride nanotubes for high-performance hydrogen peroxide production and iron-free photo-Fenton-like reactions over a wide pH range

被引：9

作者：

Jiang, Guofei ^{[1
]}

You, Xuehui ^{[1
]}

An, Beiya ^{[1
]}

Zhu, Benjie ^{[1
]}

Liu, Fang ^{[1
,2
]}

Duan, Xiaoguang ^{[3
]}

Wang, Yongqiang ^{[1
,2
]}

Zhao, Ruiyu ^{[1
,2
]}

机构：

[1] China Univ Petr, Coll Chem & Chem Engn, Qingdao 266580, Peoples R China

[2] China Univ Petr, State Key Lab Heavy Oil Proc, Qingdao 266580, Peoples R China

[3] Univ Adelaide, Sch Chem Engn & Adv Mat, Adelaide, SA 5005, Australia

来源：

APPLIED SURFACE SCIENCE | 2023年 / 618卷

关键词：

Carbon nitride nanotube; S-defectiveMoS2-v; direct Z-scheme heterojunctions; Hydrogen peroxide; photo-Fenton-like reaction; PHOTOCATALYTIC ACTIVITY; G-C3N4; NANOSHEETS; H-2; PRODUCTION; FLUORESCENCE; DEGRADATION; REDUCTION; OXIDATION; GRAPHENE; SPECTRA;

D O I：

10.1016/j.apsusc.2023.156656

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：

In this work, we first applied molybdenum disulfide with S vacancy (MoS2-v) /carbon nitride nanotube (TCN) composite (MoS2-v/TCN) to drive the iron-free photo-Fenton-like reaction. The well-designed band structure enables MoS2-v/TCN to construct direct Z-scheme heterostructures, realizing the rapid separation of photoinduced-e(-) and h(+), and effectively improving the photocatalytic efficiency of MoS2-v/TCN. DFT calculation showed that Z-scheme heterojunction greatly reduced the energy barrier for generating *OOH and *HO2-, affording MoS2/TCN high performance and stability toward H2O2 generation (pure water: 254.8-269.9 mu mol center dot g(-1)center dot h(-1), 10 % isopropanol: 1879 mu mol center dot g(-1)center dot h(-1)) over a wide pH range (3-9). The photoinduced-e(-) and Mo4+ on the surface of MoS2-v/TCN rapidly converted H2O2 in situ to strong oxidizing center dot OH, realizing the efficient degradation of organic pollutants and rapid inactivation of bacteria. This work provides a new approach to solving the technical bottlenecks in traditional Fenton oxidation via synthesizing multifunctional heterojunction for in situ H2O2 generation and activation.

引用

页数：15