Fabrication of ZnO@CeO2 core–shell hetero-structural nanofibers and enhanced gas sensing performance for acetone

2020 ◽  
Vol 13 (03) ◽  
pp. 2050013 ◽  
Author(s):  
Quan Diao ◽  
Yuna Yin ◽  
Xiaomei Zhang ◽  
Jie Li ◽  
Mingli Jiao ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Materials Characterization ◽  
Core Shell ◽  
Hetero Structure ◽  
One Dimensional ◽  
The Core ◽  
Potential Value ◽  
Enhanced Sensitivity ◽  
Electrospinning Method ◽  
Sensing Performance

ZnO@CeO2 core–shell hetero-structural nanofibers (NFs) were synthesized by a coaxial electrospinning method and the materials characterization results proved that the core–shell hetero-structure was formed. Furthermore, the sensing properties test indicated that the ZnO@CeO2 NFs exhibited higher response values and enhanced selectivity to acetone in low concentration range (0.2–10[Formula: see text]ppm) compared with ZnO and CeO2 NFs, which showed the potential value in the field of diabetes diagnose. It is suggested that the enhanced sensitivity to acetone is attributed to the synergistic effect of one-dimensional (1D) structure and the formation of ZnO and CeO2 hetero-structure.

scholarly journals Morphology and structure characterization of crystalline SnO2 1D nanostructures

2020 ◽  
Vol 12 (3) ◽  
pp. 70
Author(s):  
Wiktor Matysiak ◽  
Tomasz Tański ◽  
Weronika Monika Smok
Keyword(s):  
Tin Oxide ◽  
Gas Sensing ◽  
Hollow Nanofibers ◽  
One Dimensional ◽  
Sensing Properties ◽  
Sno2 Nanowires ◽  
Electrospinning Method ◽  
Ethanol Sensing ◽  
Sensing Performance

In recent years, many attempts have been made to improve the sensory properties of SnO2, including design of sensors based on one-dimensional nanostructures of this material, such as nanofibers, nanotubes or nanowires. One of the simpler methods of producing one-dimensional tin oxide nanomaterials is to combine the electrospinning method with a sol-gel process. The purpose of this work was to produce SnO2 nanowires using a hybrid electrospinning method combined with a heat treatment process at the temperature of 600 °C and to analyze the morphology and structure of the one-dimensional nanomaterial produced in this way. Analysis of the morphology of composite one-dimensional tin oxide nanostructures showed that smooth, homogeneous and crystalline nanowires were obtained. Full Text: PDF ReferencesN. Dharmaraj, C.H. Kim, K.W. Kim, H.Y. Kim, E.K. Suh, "Spectral studies of SnO2 nanofibres prepared by electrospinning method", Spectrochim. Acta - Part A Mol. Biomol. Spectrosc. 64, (2006) CrossRef N. Gao, H.Y. Li, W. Zhang, Y. Zhang, Y. Zeng, H. Zhixiang, ... & H. Liu, "QCM-based humidity sensor and sensing properties employing colloidal SnO2 nanowires", Sens. Actuators B Chem. 293, (2019), 129-135. CrossRef W. Ge, Y. Chang, V. Natarajan, Z. Feng, J. Zhan, X. Ma, "In2O3-SnO2 hybrid porous nanostructures delivering enhanced formaldehyde sensing performance", J.Alloys and Comp. 746, (2018) CrossRef M. Zhang, Y. Zhen, F. Sun, C. Xu, "Hydrothermally synthesized SnO2-graphene composites for H2 sensing at low operating temperature", Mater. Sci. Eng. B. 209, (2016), 37-44. CrossRef Y. Zhang, X. He, J. Li, Z. Miao, F. Huang, "Fabrication and ethanol-sensing properties of micro gas sensor based on electrospun SnO2 nanofibers", Sens. Actuators B Chem. 132, (2008), 67-73. CrossRef W.Q. Li, S.Y. Ma, J. Luo, Y.Z. Mao, L. Cheng, D.J. Gengzang, X.L. Xu, S H. Yan, "Synthesis of hollow SnO2 nanobelts and their application in acetone sensor", Mater. Lett. 132, (2014), 338-341. CrossRef E. Mudra, I. Shepa, O. Milkovic, Z. Dankova, A. Kovalcikova, A. Annusova, E. Majkova, J. Dusza, "Effect of iron doping on the properties of SnO2 nano/microfibers", Appl. Surf. Sci. 480, (2019), 876-881. CrossRef P. Mohanapriya, H. Segawa, K. Watanabe, K. Watanabe, S. Samitsu, T.S. Natarajan, N.V. Jaya, N. Ohashi, "Enhanced ethanol-gas sensing performance of Ce-doped SnO2 hollow nanofibers prepared by electrospinning", Sens. Actuators B Chem. 188, (2013), 872-878. CrossRef W.Q. Li, S.Y. Ma, Y.F. Li, X.B. Li, C.Y. Wang, X.H. Yang, L. Cheng, Y.Z. Mao, J. Luo, D.J. Gengzang, G.X. Wan, X.L. Xu, "Preparation of Pr-doped SnO2 hollow nanofibers by electrospinning method and their gas sensing properties", J.Alloys and Comp. 605, (2014), 80-88. CrossRef X.H. Xu, S.Y. Ma, X.L. Xu, T. Han, S.T. Pei, Y. Tie, P.F. Cao, W.W. Liu, B.J. Wang, R. Zhang, J.L. Zhang, "Ultra-sensitive glycol sensing performance with rapid-recovery based on heterostructured ZnO-SnO2 hollow nanotube", Mater. Lett, 273, (2020), 127967. CrossRef F. Li, X. Gao, R. Wang, T. Zhang, G. Lu, Sens. "Study on TiO2-SnO2 core-shell heterostructure nanofibers with different work function and its application in gas sensor", Actuators B Chem, 248, (2017), 812-819. CrossRef S. Bai, W. Guo, J. Sun, J. Li, Y. Tian, A. Chen, R. Luo, D. Li, "Synthesis of SnO2–CuO heterojunction using electrospinning and application in detecting of CO", Sens Actuators B Chem, 226, (2016), 96-103. CrossRef H. Du, P.J. Yao, Y. Sun, J. Wang, H. Wang, N. Yu, "Electrospinning Hetero-Nanofibers In2O3/SnO2 of Homotype Heterojunction with High Gas Sensing Activity", Sensors, 17, (2017), 1822. CrossRef X. Wang, H. Fan, P. Ren, "Electrospinning derived hollow SnO2 microtubes with highly photocatalytic property", Catal. Commun. 31, (2013), 37-41. CrossRef L. Cheng, S.Y. Ma, T.T. Wang, X.B. Li, J. Luo, W.Q. Li, Y.Z. Mao, D.J Gengzang, "Synthesis and characterization of SnO2 hollow nanofibers by electrospinning for ethanol sensing properties", Mater. Lett. 131, (2014), 23-26. CrossRef P.H. Phuoc, C.M. Hung, N.V. Toan, N.V. Duy, N.D. Hoa, N.V. Hieu, "One-step fabrication of SnO2 porous nanofiber gas sensors for sub-ppm H2S detection", Sens. Actuators A Phys. 303, (2020), 111722. CrossRef A.E. Deniz, H.A. Vural, B. Ortac, T. Uyar, "Gold nanoparticle/polymer nanofibrous composites by laser ablation and electrospinning", Matter. Lett. 65, (2011), 2941-2943. CrossRef S. Sagadevan, J. Podder, "Investigation on Structural, Surface Morphological and Dielectric Properties of Zn-doped SnO2 Nanoparticles", Mater. Res. 19, (2016), 420-425. CrossRef

Synthesis of core–shell α-Fe2O3@NiO nanofibers with hollow structures and their enhanced HCHO sensing properties

2015 ◽  
Vol 3 (10) ◽  
pp. 5635-5641 ◽  
Author(s):  
Jing Cao ◽  
Ziying Wang ◽  
Rui Wang ◽  
Sen Liu ◽  
Teng Fei ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Coaxial Electrospinning ◽  
Core Shell ◽  
Sensing Properties ◽  
Hollow Structures ◽  
Hollow Nanostructures ◽  
Electrospinning Method

Core–shell α-Fe2O3@NiO nanofibers with hollow nanostructures are synthesized by a facile coaxial electrospinning method and calcination procedure and present enhanced HCHO gas sensing performances.

Enhanced gas-sensing performance of ZnO@In2O3 core@shell nanofibers prepared by coaxial electrospinning

2018 ◽  
Vol 255 ◽  
pp. 2248-2257 ◽  
Author(s):  
Baoyu Huang ◽  
Zhenxing Zhang ◽  
Changhui Zhao ◽  
Limao Cairang ◽  
Jinglong Bai ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Coaxial Electrospinning ◽  
Core Shell ◽  
Sensing Performance

scholarly journals Cerium Oxide-Tungsten Oxide Core-Shell Nanowire-Based Microsensors Sensitive to Acetone

Biosensors ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 116 ◽  
Author(s):  
Milena Tomić ◽  
Milena Šetka ◽  
Ondřej Chmela ◽  
Isabel Gràcia ◽  
Eduard Figueras ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Cerium Oxide ◽  
Chemical Vapor ◽  
Disease Diagnosis ◽  
Core Shell ◽  
Early Disease ◽  
Vacancy Defects ◽  
The Core ◽  
Enhanced Sensitivity ◽  
Volatile Organic

Gas sensitive cerium oxide-tungsten oxide core-shell nanowires are synthesized and integrated directly into micromachined platforms via aerosol assisted chemical vapor deposition. Tests to various volatile organic compounds (acetone, ethanol, and toluene) involved in early disease diagnosis demonstrate enhanced sensitivity to acetone for the core-shell structures in contrast to the non-modified materials (i.e., only tungsten oxide or cerium oxide). This is attributed to the high density of oxygen vacancy defects at the shell, as well as the formation of heterojunctions at the core-shell interface, which provide the modified nanowires with ‘extra’ chemical and electronic sensitization as compared to the non-modified materials.

Gas-sensing performance of In2O3@MoO3 hollow core-shell nanospheres prepared by a two-step hydrothermal method

2021 ◽  
pp. 131007
Author(s):  
Haitao Fu ◽  
Xiaohong Yang ◽  
Zhenxiang Wu ◽  
Peng He ◽  
Shixian Xiong ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Gas Sensing ◽  
Core Shell ◽  
Hollow Core ◽  
Sensing Performance

Liquid-Phase Co-Exfoliated Graphene/MoS2 Nanocomposite for Methanol Gas Sensing

2015 ◽  
Vol 15 (10) ◽  
pp. 8004-8009 ◽  
Author(s):  
Shao-Lin Zhang ◽  
Hongyan Yue ◽  
Xishuang Liang ◽  
Woo-Chul Yang
Keyword(s):  
Thin Film ◽  
Gas Sensing ◽  
Synergetic Effect ◽  
Film Sensor ◽  
Thin Film Sensor ◽  
Sensor Material ◽  
Enhanced Sensitivity ◽  
Distinct Structure ◽  
Nanocomposite Sensor ◽  
Sensing Performance

We developed an efficient method to co-exfoliate graphite and MoS2 to fabricate graphene/MoS2 nanocomposite. The size, morphology, and crystal structure of the graphene/MoS2 nanocomposite were carefully examined. The as-prepared graphene/MoS2 nanocomposite was fabricated into thin film sensor by a facile drop casting method and tested with methanol gas in various concentrations. The sensitivity, response time, and repeatability of the graphene/MoS2 nanocomposite sensor towards methanol gas were systematically investigated. A pure MoS2− based thin film sensor was also prepared and compared with the nanocomposite sensor to better understand the synergetic effect in the sensing performance. Our research demonstrated that compositing MoS2 with graphene could overcome the shortcoming of MoS2 as a sensor material and bring in a promising gas-sensing performance with a quicker response/recovery time and an enhanced sensitivity. Moreover, this composited material with a distinct structure and an excellent electronic property is expected to have potential application in various fields, such as optoelectronic.

Core-shell Au@ZnO nanoparticles derived from Au@MOF and their sub-ppm level acetone gas-sensing performance

2016 ◽  
Vol 304 ◽  
pp. 241-247 ◽  
Author(s):  
Wenhui Li ◽  
Xiaofeng Wu ◽  
Ning Han ◽  
Jiayuan Chen ◽  
Wenxiang Tang ◽  
...  
Keyword(s):  
Zno Nanoparticles ◽  
Gas Sensing ◽  
Core Shell ◽  
Ppm Level ◽  
Sensing Performance

scholarly journals High-Performance Gas Sensor of Polyaniline/Carbon Nanotube Composites Promoted by Interface Engineering

Sensors ◽  
2019 ◽  
Vol 20 (1) ◽  
pp. 149 ◽  
Author(s):  
Weiyu Zhang ◽  
Shuai Cao ◽  
Zhaofeng Wu ◽  
Min Zhang ◽  
Yali Cao ◽  
...  
Keyword(s):  
High Performance ◽  
Structural Changes ◽  
Gas Sensing ◽  
Response Times ◽  
Limit Of Detection ◽  
Hierarchical Structures ◽  
Cost Effective ◽  
One Dimensional ◽  
P Type ◽  
Sensing Performance

Inspired by the enhanced gas-sensing performance by the one-dimensional hierarchical structure, one-dimensional hierarchical polyaniline/multi-walled carbon nanotubes (PANI/CNT) fibers were prepared. Interestingly, the simple heating changed the sensing characteristics of PANI from p-type to n-type and n-type PANI and p-type CNTs form p–n hetero junctions at the core–shell interface of hierarchical PANI/CNT composites. The p-type PANI/CNT (p-PANI/CNT) and n-type PANI/CNT (n-PANI/CNT) performed the higher sensitivity to NO2 and NH3, respectively. The response times of p-PANI/CNT and n-PANI/CNT to 50 ppm of NO2 and NH3 are only 5.2 and 1.8 s, respectively, showing the real-time response. The estimated limit of detection for NO2 and NH3 is as low as to 16.7 and 6.4 ppb, respectively. After three months, the responses of p-PANI/CNT and n-PANI/CNT decreased by 19.1% and 11.3%, respectively. It was found that one-dimensional hierarchical structures and the deeper charge depletion layer enhanced by structural changes of PANI contributed to the sensitive and fast responses to NH3 and NO2. The formation process of the hierarchical PANI/CNT fibers, p–n transition, and the enhanced gas-sensing performance were systematically analyzed. This work also predicts the development prospects of cost-effective, high-performance PANI/CNT-based sensors.

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