An efficient BTX sensor based on ZnO nanoflowers grown by CBD method

Acharyya, Debanjan; Bhattacharyya, P.

doi:10.1016/j.sse.2014.12.027

Cited by 38 publications

(16 citation statements)

References 26 publications

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“…This mechanism can be used to relate our calculation results with the experimental results. The trend of the calculated BTX adsorption energies on ZnO(100) (see Table 2) is indeed in agreement with the trend of sensitivity for BTX gases on ZnO material (Acharyya & Bhattacharyya, 2015;Mirzaei et al, 2018;Nagaraju et al, 2018;Shen et al, 2018;Wang et al, 2013;Zhu et al, 2004). This finding also suggests that (100) surface, being the most stable ZnO facet, might be one of the main surface facet that responsible for the detection of BTX gases.…”

Section: Resultssupporting

confidence: 82%

“…Therefore, the violation of the trend of BTEX adsorption energies is caused by the geometrical reconstruction of ethylbenzene upon its adsorption on ZnO(100) surface. (Acharyya & Bhattacharyya, 2015;Mirzaei et al, 2018;Nagaraju et al, 2018;Shen et al, 2018;Wang et al, 2013;Zhu et al, 2004). Even though the surface facet of the ZnO used in these experiments are not uniform, in most of the cases, the ZnO material always has large portions of (100) surface.…”

Section: Resultsmentioning

confidence: 99%

“…The change in the electronic structure of the surface during this reaction is interpreted as the response of the sensor. For the case of BTX gases, many experiment studies interpreted this mechanism as BTX decomposition reactions into CO2 and H2O through: Acharyya & Bhattacharyya, 2015;Mirzaei et al, 2018;Nagaraju et al, 2018;Shen et al, 2018;Wang et al, 2013;Zhu et al, 2004). This decomposition is initiated by the dehydrogenation of the benzene ring or the methyl group.…”

Section: Resultsmentioning

confidence: 99%

“…We use ZnO(100) as the surface model for studying this interaction. The (100) surface is chosen because this is one of the most stable surface facet of ZnO and the main surface facet of ZnO sensor with nanorod and nanowire morphologies (Acharyya & Bhattacharyya, 2015;Diebold, Koplitz, & Dulub, 2004;Huang & Wan, 2009;Kaneti, Yue, Jiang, & Yu, 2013;Mirzaei et al, 2018;Spencer, Wong, & Yarovsky, 2012;Wang et al, 2013;Yuliarto et al, 2017;Zhu, Xie, Wang, Huang, & Hu, 2004). The results from this study will contribute to a deeper understanding about the fundamental interaction of ZnO surface with large size molecules like BTEX and its implications on the involved sensing mechanism.…”

Section: Introductionmentioning

confidence: 98%

“…Zinc oxide (ZnO) is a wide gap metal-oxide that has been used in many resistive-based gas sensor application, including benzene, toluene and xylene (BTX) sensors. Numerous efforts have been given to engineer the morphology and composition of ZnO nanomaterial to enhance its sensitivity toward BTX gases (Acharyya & Bhattacharyya, 2015;Mirzaei et al, 2018;Nagaraju, Vijayakumar, Reddy, & Ramana Reddy, 2018;Septiani et al, 2017;Wang et al, 2013;Woo, Kwak, Chung, & Lee, 2014). Unfortunately, there is still no clear consensus on the detail sensing mechanism on this material for large size molecules like BTEX.…”

Section: Introductionmentioning

confidence: 99%

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Density Functional Study on Benzene, Toluene, Ethylbenzene and Xylene Adsorptions on ZnO(100) Surface

Nugraha

Saputro

Agusta

et al. 2019

Molekul

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We study the interaction between benzene, toluene, ethylbenzene and xylene (BTEX) molecules with ZnO(100) surface by means of density functional theory-based calculations. We find that these interactions result in the physical adsorptions of BTEX gases with adsorption distances larger than 2 Å. These adsorptions are governed by the van der Waals interaction instead of the covalent interaction. We also find that the trend of the strength of BTX adsorptions on ZnO(100) surface is in line with the experimental trend of sensitivity of ZnO material towards BTX gases (benzene < tolune < xylene). We explain this relation by using one of the sensing mechanism within the ionosorption model. By using this relation, we also predict that the response of ZnO towards ethylbenzene will be similar to the response towards toluene since these two molecules have similar adsorption energies on ZnO(100) surface.

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Section: Resultssupporting

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Density Functional Study on Benzene, Toluene, Ethylbenzene and Xylene Adsorptions on ZnO(100) Surface

Nugraha

Saputro

Agusta

et al. 2019

Molekul

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Synthesis of ZnO films in different solvents and their photocatalytic activities

Yang

Bing

et al. 2015

Crystal Research and Technology

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ZnO thin films have been successfully synthesized via the chemical bath deposition (CBD) method without using any catalysts or templates. The effects of solvents (such as water, ethanol and n‐propanol) on structure and morphology of ZnO thin films have been studied. XRD analysis showed that all ZnO thin films with wurtzite crystal structure were obtained via various solvents. SEM images showed that ZnO thin films prepared in different solvents have different sizes and morphologies. TEM images showed that crystalline ZnO samples prepared in different solvents have different growth habits. Photoluminescence and photocatalysis properties have been investigated at room temperature. ZnO thin films prepared in water showed superior photocatalytic activity in the degradation of rhodamine B (RhB) compared to other samples.

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