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题名: Preparation of ZnO hollow spheres with different surface roughness and their enhanced gas sensing property
作者: Yin, Mingli1, 2, 3;  Liu, Shengzhong1, 2, 4
关键词: ZnO ;  Hollow sphere ;  Gas sensor ;  Alcohol
刊名: SENSORS AND ACTUATORS B-CHEMICAL
发表日期: 2014-07-01
DOI: 10.1016/j.snb.2014.02.071
卷: 197, 页:58-65
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Analytical ;  Electrochemistry ;  Instruments & Instrumentation
研究领域[WOS]: Chemistry ;  Electrochemistry ;  Instruments & Instrumentation
英文摘要: ZnO hollow spherical samples with different surface roughness have been synthesized using a one-step, template-free hydrothermal method. Materials characterization has included XRD, SEM, TEM, XPS and XRF. It was found that the surface roughness of the ZnO hollow spheres can be tuned from rough to smooth via regulating trisodium citrate concentration during the synthesis. When 2 mM of trisodium citrate was used, ZnO hollow spheres showed the roughest surface morphology. With increasing the citrate concentration from 2 to 6 mM, the resultant ZnO hollow sphere morphology became increasingly denser and smoother. When the citrate concentration was further increased to 8 mM, however, the morphology became rough again. Sensors fabricated using the ZnO hollow spheres were characterized by the response to alcohol vapor. The roughest sample gave the best sensor response toward 10-500 ppm alcohol vapor, about 11-16 times higher than the reference one prepared without citrate. This corresponds to a remarkable sensor response as high as 402 and an extrapolated detection limit 0.5 ppm. The reasons behind the improvements in sensor performance are discussed. (C) 2014 Elsevier B.V. All rights reserved.
关键词[WOS]: TEMPLATE-FREE SYNTHESIS ;  HYDROTHERMAL SYNTHESIS ;  SOLVOTHERMAL METHOD ;  THIN-FILMS ;  MICROSPHERES ;  NANOSTRUCTURES ;  FABRICATION ;  SENSOR ;  NANOPARTICLES ;  PHOTOLUMINESCENCE
语种: 英语
WOS记录号: WOS:000334753200008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143192
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Natl Minist Educ, Key Lab Appl Surface & Colloid Chem, Xian 710062, Peoples R China
2.Shaanxi Normal Univ, Sch Mat Sci & Engn, Xian 710062, Peoples R China
3.Xian Technol Univ, Sch Sci, Xian 710032, Peoples R China
4.Chinese Acad Sci, Dalian Inst Chem Phys, Natl Lab Clean Energy, Dalian 116023, Peoples R China

Recommended Citation:
Yin, Mingli,Liu, Shengzhong. Preparation of ZnO hollow spheres with different surface roughness and their enhanced gas sensing property[J]. SENSORS AND ACTUATORS B-CHEMICAL,2014,197:58-65.
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