Surface functionalization of Co3O4 hollow spheres with ZnO nanoparticles for modulating sensing properties of formaldehyde

被引：82

作者：

Bai, Shouli ^{[1
]}

Guo, Jun ^{[1
]}

Shu, Xin ^{[1
]}

Xiang, Xu ^{[1
]}

Luo, Ruixian ^{[1
]}

Li, Dianqing ^{[1
]}

Chen, Aifan ^{[1
]}

Liu, Chung Chiun ^{[2
]}

机构：

[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing Key Lab Environm Harmful Chem Anal, Beijing 100029, Peoples R China

[2] Case Western Reserve Univ, Dept Chem & Biomol Engn, Cleveland, OH 44106 USA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2017年 / 245卷

基金：

中国国家自然科学基金;

关键词：

SiO2; template; Co3O4/ZnO hollow composite; Formaldehyde sensor; p-n heterojunctions; FACILE SYNTHESIS; GAS; MECHANISM; SENSORS; PERFORMANCE; NANOFIBERS; NANOCOMPOSITES; CHEMIRESISTOR; NANOTUBES; OXIDATION;

D O I：

10.1016/j.snb.2017.01.102

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The Co3O4 hollow spheres with 3D hierarchical structure have been synthesized successfully by a facile precipitation method using SiO2 spheres as hard template. The hierarchical structure of Co3O4 as a good substrate material can be further functioned because of its stable and porous structure as well as large specific surface. To improve the gas sensing properties of Co3O4, ZnO nanoparticles were introduced to modify Co3O4 into the Co3O4/ZnO composites. The structure and properties of composite were characterized by XRD, FESEM, HRTEM and XPS analysis. Gas-sensing experiments reveal that the hollow Co3O4/ZnO composite not only exhibits high sensitivity that is 4 times higher than that of pristine Co3O4, rapid response and recovery but also has excellent selectivity and relatively low operating temperature to 10 ppm HCHO. Such excellent performance may be attributed to the hollow hierarchical structure and the formation of p-n heterojunctions at interface between both oxides. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：359 / 368

页数：10

共 46 条

[1] Graphene/poly(methyl methacrylate) chemiresistor sensor for formaldehyde odor sensing [J].

Alizadeh, Taher ;

Soltani, Leyla Hamed .

JOURNAL OF HAZARDOUS MATERIALS, 2013, 248 :401-406

[2] Polyaniline@SnO2 heterojunction loading on flexible PET thin film for detection of NH3 at room temperature [J].

Bai, Shouli ;

Tian, Yanli ;

Cui, Meng ;

Sun, Jianhua ;

Tian, Ye ;

Luo, Ruixian ;

Chen, Aifan ;

Li, Dianqing .

SENSORS AND ACTUATORS B-CHEMICAL, 2016, 226 :540-547

[3] Mechanism of enhancing the formaldehyde sensing properties of Co3O4 via Ag modification [J].

Bai, Shouli ;

Liu, Haiyan ;

Sun, Jianhua ;

Tian, Ye ;

Luo, Ruixian ;

Li, Dianqing ;

Chen, Aifan .

RSC ADVANCES, 2015, 5 (60) :48619-48625

[4] Synthesis of MoO3/reduced graphene oxide hybrids and mechanism of enhancing H2S sensing performances [J].

Bai, Shouli ;

Chen, Chao ;

Luo, Ruixian ;

Chen, Aifan ;

Li, Dianqing .

SENSORS AND ACTUATORS B-CHEMICAL, 2015, 216 :113-120

[5] SnO2@Co3O4 p-n heterostructures fabricated by electrospinning and mechanism analysis enhanced acetone sensing [J].

Bai, Shouli ;

Liu, Haiyan ;

Luo, Ruixian ;

Chen, Aifan ;

Li, Dianqing .

RSC ADVANCES, 2014, 4 (108) :62862-62868

[6] Polythiophene-WO3 hybrid architectures for low-temperature H2S detection [J].

Bai, Shouli ;

Zhang, Kewei ;

Sun, Jianhua ;

Zhang, Dongfeng ;

Luo, Ruixian ;

Li, Dianqing ;

Liu, Chungchiun .

SENSORS AND ACTUATORS B-CHEMICAL, 2014, 197 :142-148

[7] Sensing performance and mechanism of Fe-doped ZnO microflowers [J].

Bai, Shouli ;

Guo, Teng ;

Zhao, Yangbo ;

Sun, Jianhua ;

Li, Dianqing ;

Chen, Aifan ;

Liu, Chung Chiun .

SENSORS AND ACTUATORS B-CHEMICAL, 2014, 195 :657-666

[8] Co3O4/ZnO Nanocomposites: From Plasma Synthesis to Gas Sensing Applications [J].

Bekermann, D. ;

Gasparotto, A. ;

Barreca, D. ;

Maccato, C. ;

Comini, E. ;

Sada, C. ;

Sberveglieri, G. ;

Devi, A. ;

Fischer, R. A. .

ACS APPLIED MATERIALS & INTERFACES, 2012, 4 (02) :928-934

[9] Core-shell Co3O4/α-Fe2O3 heterostructure nanofibers with enhanced gas sensing properties [J].

Cao, Jing ;

Wang, Ziying ;

Wang, Rui ;

Liu, Sen ;

Fei, Teng ;

Wang, Lijie ;

Zhang, Tong .

RSC ADVANCES, 2015, 5 (46) :36340-36346

[10] Conductometric formaldehyde gas sensors. A review: From conventional films to nanostructured materials [J].

Castro-Hurtado, I. ;

Mandayo, G. G. ;

Castano, E. .

THIN SOLID FILMS, 2013, 548 :665-676

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