Enhanced response and selectivity of H2S sensing through controlled Ni doping into ZnO nanorods by using single metal organic precursors

Modaberi, Matin Roshanzamir; Rooydell, Reza; Brahma, Sanjaya; Akande, Amos Adeleke; Mwakikunga, Bonex W; Liu, Chuan Pu

doi:10.1016/j.snb.2018.06.117

Cited by 65 publications

(23 citation statements)

References 45 publications

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“…Doping of metal ions in SMONs can increase the number of active sites and defects on the surface of SMON nanocrystals, and thus enhance the amount of oxygen species and increase the adsorbed gas molecules on the sensor's surface. Therefore, the gas sensing performance of the SMONs can be effectively improved by doping of metal ions including Al 3+ , 117,271 Cu 2+ , 272,273 Zn 2+ , 274 Ni 2+ , 275,276 Co 3+ , 277,278 Fe 3+ , 279 Mg 2+ 280 and Sb 5+ . 281 The recent key sensing applications of RT gas sensors using this method are summarized in Table 4.…”

Section: Review Materials Horizonsmentioning

confidence: 99%

Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature

et al. 2019

Mater. Horiz.

593

328

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Section: Review Materials Horizonsmentioning

confidence: 99%

Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature

et al. 2019

Mater. Horiz.

593

328

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“…Meanwhile, metal oxide (MO) materials gas sensors, such as ZnO [7,8,9], CuO [10,11], In 2 O 3 [12,13], WO 3 [14,15], CeO 2 [16], SnO 2 [17,18], etc., have attracted extensive attention. Besides, MO materials exhibit outstanding sensing properties in the detection of H 2 S gas [19,20,21,22]. Kaur et al [23] prepared In 2 O 3 whiskers by the carbothermal method and the In 2 O 3 whiskers exhibited excellent sensing properties toward H 2 S gas.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ZnO Hierarchical Structures and Their Gas Sensing Properties

et al. 2019

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Firecracker-like ZnO hierarchical structures (ZnO HS1) were synthesized by combining electrospinning with hydrothermal methods. Flower-like ZnO hierarchical structures (ZnO HS2) were prepared by a hydrothermal method using ultrasound-treated ZnO nanofibers (ZnO NFs) as raw material which has rarely been reported in previous papers. Scanning electron microscope (SEM) and transmission electron microscope’s (TEM) images clearly indicated the existence of nanoparticles on the ZnO HS2 material. Both gas sensors exhibited high selectivity toward H2S gas over various other gases at 180 °C. The ZnO HS2 gas sensor exhibited higher H2S sensitivity response (50 ppm H2S, 42.298) at 180 °C than ZnO NFs (50 ppm H2S, 9.223) and ZnO HS1 (50 ppm H2S, 17.506) gas sensors. Besides, the ZnO HS2 sensor showed a shorter response time (14 s) compared with the ZnO NFs (25 s) and ZnO HS1 (19 s) gas sensors. The formation diagram of ZnO hierarchical structures and the gas sensing mechanism were evaluated. Apart from the synergistic effect of nanoparticles and nanoflowers, more point–point contacts between flower-like ZnO nanorods were advantageous for the excellent H2S sensing properties of ZnO HS2 material.

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“…Woo et al [45] reported that the Co doped ZnO nanowires was sensitive to p-xylene compared with other gases. The selectivity of p-xylene was attributed to the moderate and tuned catalytic activity of the Co. Modaberi et al [46] reported that the Ni content provided is beyond the solubility limit of ZnO lattices, NiO will precipitate depleting the fraction of Ni 2 + substituting for ZnO lattice sites. As shown in X-ray photoelectron spectroscopy (XPS) spectra, the relative ratio of Ni 3 + /Ni 2 + increases, and the intensity of green emission (caused by oxygen vacancy (…”

Section: Doping Of Transition Metalmentioning

confidence: 99%

“…For example, Ni doping ZnO can realize the detection of H 2 S gas at room temperature. [46] The MOS doped ZnO can significantly enhance the sensor sensitivity. For example, the detection limit of Al 2 O 3 doped ZnO for H 2 S is as low as 10ppb.…”

Section: P E R S O N a L A C C O U N T T H E C H E M I C A L R E C O R Dmentioning

confidence: 99%

Advances in Doped ZnO Nanostructures for Gas Sensor

Wang

Gong

et al. 2020

The Chemical Record

131

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Gas sensors based on metal oxides semiconductor (MOS) have attracted extensive attention from both academic and industry. ZnO, as a typical MOS, exhibits potential applications in toxic gas detection, owning to its wide band gap, n-type transport characteristic and excellent electrical performance. Meanwhile, doping is an effective way to improve the sensing performance of ZnO materials. In this review, the effects of different types of doping on morphology, crystal structure, band gap and depletion layer of ZnO materials are comprehensively discussed. Theoretical analysis on the strategies for enhancing the sensing properties of ZnO is also provided. This review puts forward the reasonable insight for designing efficient n-type ZnO-based semiconductor oxide sensing materials.

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Enhanced response and selectivity of H2S sensing through controlled Ni doping into ZnO nanorods by using single metal organic precursors

Cited by 65 publications

References 45 publications

Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature

Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature

Synthesis of ZnO Hierarchical Structures and Their Gas Sensing Properties

Advances in Doped ZnO Nanostructures for Gas Sensor

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