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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 repeatedly alternate experiment to detect the composite gases between biogas (5 ppm of H2S gas and 95 ppm of CH4) and CH4 at 160°C.
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f9: A repeatedly alternate experiment to detect the composite gases between biogas (5 ppm of H2S gas and 95 ppm of CH4) and CH4 at 160°C.

Mentions: An alternate experiment is also carried out to detect the composite gases between biogas (5 ppm of H2S gas and 95 ppm of CH4) and 100 ppm pure CH4 at 160°C (Figure 9). Firstly, a low signal was observed at 3.1 after exposed to100 ppm of CH4. Then, the response increased sharply to 335 after encountering a composite biogas with 5% H2S. Similarly, we can also test the repeatability of our sensor performance by switching the working environment between pure CH4 and a composite biogas. It is clear that no obvious deterioration of the response can be observed during this experiments although there indeed exists a slightly drop after extended cycles. It can be concluded that SNC1 nanoparticles-based H2S sensor is promising for biogas composition monitoring.


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 repeatedly alternate experiment to detect the composite gases between biogas (5 ppm of H2S gas and 95 ppm of CH4) and CH4 at 160°C.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f9: A repeatedly alternate experiment to detect the composite gases between biogas (5 ppm of H2S gas and 95 ppm of CH4) and CH4 at 160°C.
Mentions: An alternate experiment is also carried out to detect the composite gases between biogas (5 ppm of H2S gas and 95 ppm of CH4) and 100 ppm pure CH4 at 160°C (Figure 9). Firstly, a low signal was observed at 3.1 after exposed to100 ppm of CH4. Then, the response increased sharply to 335 after encountering a composite biogas with 5% H2S. Similarly, we can also test the repeatability of our sensor performance by switching the working environment between pure CH4 and a composite biogas. It is clear that no obvious deterioration of the response can be observed during this experiments although there indeed exists a slightly drop after extended cycles. It can be concluded that SNC1 nanoparticles-based H2S sensor is promising for biogas composition monitoring.

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