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A Au-functionalized ZnO nanowire gas sensor for detection of benzene and toluene.
Phys Chem Chem Phys 2013; 15(40):17179-86PC

Abstract

A novel sensing hybrid-material of Au nanoparticles (Au NPs)-functionalized ZnO nanowires (Au-ZnO NWs) was successfully synthesized by a two-stage solution process. First, ZnO NWs were fabricated via a low-temperature one-pot hydrothermal method with SDSN introduced as a structure-directing agent. Afterward, the as-prepared ZnO NWs were used as supports to load Au NPs with small sizes via precipitating HAuCl4 aqueous solution with ammonia. The obtained samples were characterized by means of XRD, SEM, TEM and EDX. Both pristine and Au-ZnO NWs were practically applied as gas sensors to compare the effect of Au NPs on the sensing performances and the obtained results demonstrated that after functionalization by catalytic Au NPs, the hybrid sensor exhibited not only faster response and recovery speeds but also a higher response to benzene and toluene than the pristine ZnO sensor at 340 °C, especially showing high selectivity and long-term stability for low concentration toluene, which is rarely reported with this method, indicating its original sensor application in detecting benzene and toluene. To interpret the enhanced gas sensing mechanism, the strong spillover effect of the Au NPs and the increased Schottky barriers caused by the electronic interaction between Au NPs and ZnO NW support are believed to contribute to the improved sensor performance.

Authors+Show Affiliations

Tianjin Key Lab of Metal and Molecule-based Material Chemistry, Department of Chemistry, Nankai University, Tianjin, 300071, China. shrwang@nankai.edu.cn.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24013527

Citation

Wang, Liwei, et al. "A Au-functionalized ZnO Nanowire Gas Sensor for Detection of Benzene and Toluene." Physical Chemistry Chemical Physics : PCCP, vol. 15, no. 40, 2013, pp. 17179-86.
Wang L, Wang S, Xu M, et al. A Au-functionalized ZnO nanowire gas sensor for detection of benzene and toluene. Phys Chem Chem Phys. 2013;15(40):17179-86.
Wang, L., Wang, S., Xu, M., Hu, X., Zhang, H., Wang, Y., & Huang, W. (2013). A Au-functionalized ZnO nanowire gas sensor for detection of benzene and toluene. Physical Chemistry Chemical Physics : PCCP, 15(40), pp. 17179-86. doi:10.1039/c3cp52392f.
Wang L, et al. A Au-functionalized ZnO Nanowire Gas Sensor for Detection of Benzene and Toluene. Phys Chem Chem Phys. 2013 Oct 28;15(40):17179-86. PubMed PMID: 24013527.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A Au-functionalized ZnO nanowire gas sensor for detection of benzene and toluene. AU - Wang,Liwei, AU - Wang,Shurong, AU - Xu,Mijuan, AU - Hu,Xiaojing, AU - Zhang,Hongxin, AU - Wang,Yanshuang, AU - Huang,Weiping, PY - 2013/9/10/entrez PY - 2013/9/10/pubmed PY - 2014/4/16/medline SP - 17179 EP - 86 JF - Physical chemistry chemical physics : PCCP JO - Phys Chem Chem Phys VL - 15 IS - 40 N2 - A novel sensing hybrid-material of Au nanoparticles (Au NPs)-functionalized ZnO nanowires (Au-ZnO NWs) was successfully synthesized by a two-stage solution process. First, ZnO NWs were fabricated via a low-temperature one-pot hydrothermal method with SDSN introduced as a structure-directing agent. Afterward, the as-prepared ZnO NWs were used as supports to load Au NPs with small sizes via precipitating HAuCl4 aqueous solution with ammonia. The obtained samples were characterized by means of XRD, SEM, TEM and EDX. Both pristine and Au-ZnO NWs were practically applied as gas sensors to compare the effect of Au NPs on the sensing performances and the obtained results demonstrated that after functionalization by catalytic Au NPs, the hybrid sensor exhibited not only faster response and recovery speeds but also a higher response to benzene and toluene than the pristine ZnO sensor at 340 °C, especially showing high selectivity and long-term stability for low concentration toluene, which is rarely reported with this method, indicating its original sensor application in detecting benzene and toluene. To interpret the enhanced gas sensing mechanism, the strong spillover effect of the Au NPs and the increased Schottky barriers caused by the electronic interaction between Au NPs and ZnO NW support are believed to contribute to the improved sensor performance. SN - 1463-9084 UR - https://www.unboundmedicine.com/medline/citation/24013527/A_Au_functionalized_ZnO_nanowire_gas_sensor_for_detection_of_benzene_and_toluene_ L2 - https://doi.org/10.1039/c3cp52392f DB - PRIME DP - Unbound Medicine ER -