Limits...
Gas sensing of SnO2 nanocrystals revisited: developing ultra-sensitive sensors for detecting the H2S leakage of biogas.

Mei L, Chen Y, Ma J - Sci Rep (2014)

Bottom Line: As a typical mode of energy from waste, biogas technology is of great interest to researchers.The sensitivity of as-obtained SnO2 sensor towards 5 ppm H2S can reach up to 357.Such a technique based on SnO2 nanocrystals opens up a promising avenue for future practical applications in real-time monitoring a trace of H2S from the leakage of biogas.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, P. R. China.

ABSTRACT
As a typical mode of energy from waste, biogas technology is of great interest to researchers. To detect the trace H2S released from biogas, we herein demonstrate a high-performance sensor based on highly H2S-sensitive SnO2 nanocrystals, which have been selectively prepared by solvothermal methods using benzimidazole as a mineralization agent. The sensitivity of as-obtained SnO2 sensor towards 5 ppm H2S can reach up to 357. Such a technique based on SnO2 nanocrystals opens up a promising avenue for future practical applications in real-time monitoring a trace of H2S from the leakage of biogas.

No MeSH data available.


Related in: MedlinePlus

(a) Sensors responses to CO, H2, NH3, SO2, CH4, and H2S at 125°C and Sensors responses of SNC1 to various gases with different operating temperatures (the inset of Figure 5).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4129425&req=5

f5: (a) Sensors responses to CO, H2, NH3, SO2, CH4, and H2S at 125°C and Sensors responses of SNC1 to various gases with different operating temperatures (the inset of Figure 5).

Mentions: High SBET metal oxides have been demonstrated to be promising for gas sensing. Especially, a sensitive gas sensor with high selectivity for trace H2S is extremely important to detect the biogas. In this study, a comparison of the sensor response of SnO2 nanocrystals to 25 ppm of various gases at operating temperature of 125°C is shown in Figure 5 and S8. Notably, all the sensor response stowards different gases are all less than 2 orders of magnitude as compared to the signal from H2S. From the plot, it is clear that SCN1 shows not only enhanced sensitivity towards H2S but also a very high selectivity. The variation of sensitivity of SNC1 under different operating temperature towards 25 ppm of H2S is shown in the Table (the inset of Figure 5).It is clear that SNC1 has an obvious response to H2S gas between 45°C and 200°C, and excellent selectivity towards H2S gas. The excellent selectivity of SNC1 facilitates the application for detecting H2S.


Gas sensing of SnO2 nanocrystals revisited: developing ultra-sensitive sensors for detecting the H2S leakage of biogas.

Mei L, Chen Y, Ma J - Sci Rep (2014)

(a) Sensors responses to CO, H2, NH3, SO2, CH4, and H2S at 125°C and Sensors responses of SNC1 to various gases with different operating temperatures (the inset of Figure 5).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4129425&req=5

f5: (a) Sensors responses to CO, H2, NH3, SO2, CH4, and H2S at 125°C and Sensors responses of SNC1 to various gases with different operating temperatures (the inset of Figure 5).
Mentions: High SBET metal oxides have been demonstrated to be promising for gas sensing. Especially, a sensitive gas sensor with high selectivity for trace H2S is extremely important to detect the biogas. In this study, a comparison of the sensor response of SnO2 nanocrystals to 25 ppm of various gases at operating temperature of 125°C is shown in Figure 5 and S8. Notably, all the sensor response stowards different gases are all less than 2 orders of magnitude as compared to the signal from H2S. From the plot, it is clear that SCN1 shows not only enhanced sensitivity towards H2S but also a very high selectivity. The variation of sensitivity of SNC1 under different operating temperature towards 25 ppm of H2S is shown in the Table (the inset of Figure 5).It is clear that SNC1 has an obvious response to H2S gas between 45°C and 200°C, and excellent selectivity towards H2S gas. The excellent selectivity of SNC1 facilitates the application for detecting H2S.

Bottom Line: As a typical mode of energy from waste, biogas technology is of great interest to researchers.The sensitivity of as-obtained SnO2 sensor towards 5 ppm H2S can reach up to 357.Such a technique based on SnO2 nanocrystals opens up a promising avenue for future practical applications in real-time monitoring a trace of H2S from the leakage of biogas.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, State Key Laboratory for Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, P. R. China.

ABSTRACT
As a typical mode of energy from waste, biogas technology is of great interest to researchers. To detect the trace H2S released from biogas, we herein demonstrate a high-performance sensor based on highly H2S-sensitive SnO2 nanocrystals, which have been selectively prepared by solvothermal methods using benzimidazole as a mineralization agent. The sensitivity of as-obtained SnO2 sensor towards 5 ppm H2S can reach up to 357. Such a technique based on SnO2 nanocrystals opens up a promising avenue for future practical applications in real-time monitoring a trace of H2S from the leakage of biogas.

No MeSH data available.


Related in: MedlinePlus