Facile Synthesis of Highly Dispersed Co3O4 Nanoparticles on Expanded, Thin Black Phosphorus for a ppb-Level NOx Gas Sensor

被引：76

作者：

Liu, Yang ^{[1
]}

Wang, Yang ^{[1
]}

Ikram, Muhammad ^{[1
]}

Lv, He ^{[1
]}

Chang, Jingbo ^{[2
]}

Li, Zhengkang ^{[1
]}

Ma, Laifeng ^{[1
]}

Rehman, Afrasiab Ur ^{[1
]}

Lu, Ganhua ^{[2
]}

Chen, Junhong ^{[2
]}

Shi, Keying ^{[1
]}

机构：

[1] Heilongjiang Univ, Sch Chem & Mat Sci, Minist Educ, Key Lab Funct Inorgan Mat Chem, Harbin 150080, Heilongjiang, Peoples R China

[2] Univ Wisconsin, Dept Mech Engn, 3200 North Cramer St, Milwaukee, WI 53211 USA

来源：

ACS SENSORS | 2018年 / 3卷 / 08期

关键词：

expanded black phosphorus; few-layer black phosphorus; Co3O4@BP-PEI composite; highly dispersed Co3O4 nanoparticles; NOx; gas-sensing; GRAPHENE OXIDE; HYDROGEN EVOLUTION; SCHOTTKY-BARRIER; METAL; SURFACE; SEMICONDUCTOR; TRANSISTORS; PERFORMANCE; NANOHYBRID; RESOLUTION;

D O I：

10.1021/acssensors.8b00397

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Expanded few-layer black phosphorus nanosheets (FL-BP NSs) were functionalized by branched polyethylenimine (PEI) using a simple noncovalent assembly to form air-stable overlayers (BP-PEI), and a Co3O4@BP-PEI composite was designed and synthesized using a hydrothermal method. The size of the highly dispersed Co3O4 nanoparticles (NPs) on the FL-BP NSs can be controlled. The BP-CS (190 degrees C for 5 h) sensor, with 4-6 nm Co3O4 NPs on the FL-BP NSs, exhibited an ultrahigh sensitivity of 8.38 and a fast response of 0.67 s to 100 ppm of NOx at room temperature in air, which is 4 times faster than the response of the FL-BP NS sensor, and the lower detection limit reached 10 ppb. This study points to a promising method for tuning properties of BP-based composites by forming air-stable overlayers and highly dispersed metal oxide NPs for use in high-performance gas sensors.

引用

页码：1576 / 1583

页数：15

共 47 条

[41] Self-Supported Nanoporous Cobalt Phosphide Nanowire Arrays: An Efficient 3D Hydrogen-Evolving Cathode over the Wide Range of pH 0-14 [J].