Journal ArticleDOI
Controllable preparation of faceted Co3O4 nanocrystals@MnO2 nanowires shish-kebab structures with enhanced triethylamine sensing performance
TLDR
In this paper, a novel one-dimensional shish-kebab structures composed of active (110)-faceted α-MnO2 nanowires as backbones and (111)-Faceted Co3O4 nanocrystals as shells were prepared by a hydrothermal method followed by an in-situ epitaxial attachment growth strategy.Abstract:
Novel one-dimensional shish-kebab structures composed of active (110)-faceted α-MnO2 nanowires as backbones and (111)-faceted Co3O4 nanocrystals as shells were prepared by a hydrothermal method followed by an in-situ epitaxial attachment growth strategy. A series of characterization revealed the formation of Co3O4@MnO2 heterostructures with closely integrated hetero-interfaces. The growth mechanism study suggested that the multiple functions of hexamethylenetetramine were crucial for the the successful growth of the Co3O4@MnO2 heterostructures. The gas sensing performance of the Co3O4@MnO2 heterostructures was studied for the first time. It was shown that the Co3O4@MnO2 heterostructures exhibited obvious enhanced triethylamine sensing performance compared with bare MnO2 nanowires and Co3O4 nanocrystals, suggesting a strong synergistic effect. The unique one-dimensional shish-kebab structures, increased surface active oxygen species and closely-attached hetero-interface were the key factors to improve the triethylamine sensing performance. The work not only provide an in-situ strategy for the synthesis of one-dimensional heterostructures, but also provide an effective way to improve the inherently low gas response of α-MnO2 through comprehensive design of morphology, crystal facet and hetero-interface. Moreover, thanks to the unique morphology, surface and interface characteristics of the Co3O4@MnO2 heterostructures, they are expected to be used in more fields, such as batteries, supercapacitor and catalysis.read more
Citations
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Journal ArticleDOI
Sn doping effect on NiO hollow nanofibers based gas sensors about the humidity dependence for triethylamine detection
Jiaqi Yang,Wenjiang Han,Jian Ma,Chong Wang,Kengo Shimanoe,Sumei Zhang,Yanfeng Sun,Pengfei Cheng,Yinglin Wang,Hong Zhang,Geyu Lu +10 more
TL;DR: In this article, a series of Sn-doped NiO hollow nanofibers were prepared through a facile electrospinning process followed by heat treatment, and the results indicated that Sn doping could significantly enhance the gas response towards triethylamine at a relative low temperature.
Journal ArticleDOI
MOF-Derived Mesoporous and Hierarchical Hollow-Structured In2O3-NiO Composites for Enhanced Triethylamine Sensing.
Qi Yu,Rongrong Jin,Liupeng Zhao,Tianshuang Wang,Fangmeng Liu,Xu Yan,Chenguang Wang,Peng Sun,Geyu Lu +8 more
TL;DR: In this paper, the mesoporous In2O3-NiO hollow spheres consisting of nanosheets were prepared via a solvothermal reaction and subsequent cation exchange.
Journal ArticleDOI
Confined synthesis of 2D ultrathin ZnO/Co3O4 nanomeshes heterostructure for superior triethylamine detection at low temperature
Ya Xiong,Wendi Liu,Xurong Qiao,Xiaojie Song,Shichao Wang,Xiaoli Zhang,Xinzhen Wang,Jian Tian +7 more
TL;DR: In this paper, a two-dimensional (2D) ultrathin and mesoporous Co3O4 nanomeshes modified by ZnO nanocrystals (ZnO/Co 3O4-2) was achieved via in-situ growth of ZIF-8 polyhedral particles on ultra-thin ZIF67 nanosheets, which was synthesized by a salt-template strategy followed by calcination.
Journal ArticleDOI
Highly selective triethylamine sensing based on SnO/SnO2 nanocomposite synthesized by one-step solvothermal process and sintering
Lingling Meng,Weiyi Bu,Yuliang Li,Q.D. Qin,Zhijie Zhou,Changhua Hu,Xiaohong Chuai,Chenguang Wang,Peng Sun,Geyu Lu +9 more
TL;DR: In this paper, the results of gas sensing measurement on synthesized nanocomposites indicated that the sample annealed at 300°C showed excellent triethylamine sensing performance at 225°C.
Journal ArticleDOI
Resistive room temperature DMA gas sensor based on the forest-like unusual n-type PANI/TiO2 nanocomposites
Meng Yang,Xian-Fa Zhang,Chuanyu Guo,Xiaoli Cheng,Chonghui Zhu,Yingming Xu,Zoltan Major,Lihua Huo +7 more
TL;DR: In this article, a resistive gas sensor based on PANI/TiO2 nanocomposite was proposed to detect dimethylamine (DMA) at room temperature.
References
More filters
Journal ArticleDOI
Nanoscale metal oxide-based heterojunctions for gas sensing: A review
TL;DR: In this paper, the dominant electronic and chemical mechanisms that influence the performance of metal-oxide-based resistive-type gas sensors are discussed, including p-n and n-n potential barrier manipulation, n-p-n response type inversions, spillover effects, synergistic catalytic behavior, and microstructure enhancement.
Journal ArticleDOI
Semiconductor metal oxide gas sensors: A review
TL;DR: In this paper, a detailed study of semiconductor metal oxide (SMO) gas sensors is provided for a detailed comparison of SMO gas sensors with other gas sensors, especially for ammonia gas sensing.
Journal ArticleDOI
SnO2: A comprehensive review on structures and gas sensors
Soumen Das,V. Jayaraman +1 more
TL;DR: In this paper, a review of the state-of-the-art work on nanostructures of metal oxides is presented, focusing on the physical and chemical properties of low-dimensional oxide materials.
Journal ArticleDOI
Zinc Oxide Nanostructures for NO2 Gas–Sensor Applications: A Review
TL;DR: Various factors such as NO2 concentrations, annealing temperature, ZnO morphologies and particle sizes, relative humidity, operating temperatures which are affecting the NO2 gas sensing properties are discussed in this review.
Journal ArticleDOI
Mn 3s exchange splitting in mixed-valence manganites.
V. R. Galakhov,M. Demeter,S. Bartkowski,Martin Neumann,N. A. Ovechkina,Ernst Z. Kurmaev,N. I. Lobachevskaya,Ya. M. Mukovskii,John F. Mitchell,David L. Ederer +9 more
TL;DR: In this article, the authors presented Mn $3s$ x-ray photoelectron spectra of manganese oxides with the Mn formal valency from $2+$ to $4+.