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Synthesis and Gas Sensing Properties of Single La-Doped SnO₂ Nanobelts.

Wu Y, Zhang H, Liu Y, Chen W, Ma J, Li S, Qin Z - Sensors (Basel) (2015)

Bottom Line: Single crystal SnO2 nanobelts (SnO2 NBs) and La-SnO2 nanobelts (La-SnO2 NBs) were synthesized by thermal evaporation.Both a single SnO2 NB sensor and a single La-SnO2 NB sensor were developed and their sensing properties were investigated.The mechanism behind the enhanced sensing performance of La-doped SnO2 nanobelts is discussed.

View Article: PubMed Central - PubMed

Affiliation: Institute of Physics and Electronic Information Technology, Yunnan Normal University, Kunming 650500, China. wuyuemei893@163.com.

ABSTRACT
Single crystal SnO2 nanobelts (SnO2 NBs) and La-SnO2 nanobelts (La-SnO2 NBs) were synthesized by thermal evaporation. Both a single SnO2 NB sensor and a single La-SnO2 NB sensor were developed and their sensing properties were investigated. It is found that the single La-SnO2 NB sensor had a high sensitivity of 8.76 to ethanediol at a concentration of 100 ppm at 230 °C, which is the highest sensitivity of a single SnO2 NB to ethanediol among three kinds of volatile organic (VOC) liquids studied, including ethanediol, ethanol, and acetone. The La-SnO2 NBs sensor also exhibits a high sensitivity, good selectivity and long-term stability with prompt response time to ethanediol. The mechanism behind the enhanced sensing performance of La-doped SnO2 nanobelts is discussed.

No MeSH data available.


The HRTEM and SEAD images of pure SnO2 NBs (a) and La-SnO2 NBs (b).
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sensors-15-14230-f003: The HRTEM and SEAD images of pure SnO2 NBs (a) and La-SnO2 NBs (b).

Mentions: For further insight into the microstructures of SnO2 NBs and La-SnO2 ones, HRTEM images and selected area electron diffraction (SAED) patterns of a single SnO2 NB and La-SnO2 one were obtained and are shown in Figure 3a,b, respectively. The lattice spacing between the adjacent planes is 0.4693 nm, corresponding within the measurement error to the d(100) interplanar spacing. The left inset of Figure 3b shows that the interplanar spacings between the adjacent planes are 0.2646 nm and 0.2644 nm, respectively, which correspond to (101) and the (10) crystal planes. Their selected-area electron diffraction (SAED) patterns in the right insets of Figure 3a,b were indexed to a tetragonal structure with a = b = 0.4736 nm, c = 0.3188 nm. Comparison of the HRTEM and SAED results reveals that the growth directions of SnO2 NB and La-SnO2 NB are along [100] and [101] from the edge of a nanobelt, respectively. Besides the growth direction, we have not found any influences of La3+ ions on the obtained sample’s microstructure.


Synthesis and Gas Sensing Properties of Single La-Doped SnO₂ Nanobelts.

Wu Y, Zhang H, Liu Y, Chen W, Ma J, Li S, Qin Z - Sensors (Basel) (2015)

The HRTEM and SEAD images of pure SnO2 NBs (a) and La-SnO2 NBs (b).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4507622&req=5

sensors-15-14230-f003: The HRTEM and SEAD images of pure SnO2 NBs (a) and La-SnO2 NBs (b).
Mentions: For further insight into the microstructures of SnO2 NBs and La-SnO2 ones, HRTEM images and selected area electron diffraction (SAED) patterns of a single SnO2 NB and La-SnO2 one were obtained and are shown in Figure 3a,b, respectively. The lattice spacing between the adjacent planes is 0.4693 nm, corresponding within the measurement error to the d(100) interplanar spacing. The left inset of Figure 3b shows that the interplanar spacings between the adjacent planes are 0.2646 nm and 0.2644 nm, respectively, which correspond to (101) and the (10) crystal planes. Their selected-area electron diffraction (SAED) patterns in the right insets of Figure 3a,b were indexed to a tetragonal structure with a = b = 0.4736 nm, c = 0.3188 nm. Comparison of the HRTEM and SAED results reveals that the growth directions of SnO2 NB and La-SnO2 NB are along [100] and [101] from the edge of a nanobelt, respectively. Besides the growth direction, we have not found any influences of La3+ ions on the obtained sample’s microstructure.

Bottom Line: Single crystal SnO2 nanobelts (SnO2 NBs) and La-SnO2 nanobelts (La-SnO2 NBs) were synthesized by thermal evaporation.Both a single SnO2 NB sensor and a single La-SnO2 NB sensor were developed and their sensing properties were investigated.The mechanism behind the enhanced sensing performance of La-doped SnO2 nanobelts is discussed.

View Article: PubMed Central - PubMed

Affiliation: Institute of Physics and Electronic Information Technology, Yunnan Normal University, Kunming 650500, China. wuyuemei893@163.com.

ABSTRACT
Single crystal SnO2 nanobelts (SnO2 NBs) and La-SnO2 nanobelts (La-SnO2 NBs) were synthesized by thermal evaporation. Both a single SnO2 NB sensor and a single La-SnO2 NB sensor were developed and their sensing properties were investigated. It is found that the single La-SnO2 NB sensor had a high sensitivity of 8.76 to ethanediol at a concentration of 100 ppm at 230 °C, which is the highest sensitivity of a single SnO2 NB to ethanediol among three kinds of volatile organic (VOC) liquids studied, including ethanediol, ethanol, and acetone. The La-SnO2 NBs sensor also exhibits a high sensitivity, good selectivity and long-term stability with prompt response time to ethanediol. The mechanism behind the enhanced sensing performance of La-doped SnO2 nanobelts is discussed.

No MeSH data available.