Sensing Application — A Water-Stable Proton-Conductive Barium(II)-Organic Framework for Ammonia Sensing at High Humidity

3 measurement groups · 60 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

Gas-response and selectivity analysis from impedance response

MOF 1 pellet during humid NH3 exposure · Pellet

NH3 concentration-response at 30 deg C and 75-98% RH; selectivity measured against ten interfering gases at 25 ppm, 30 deg C, 98% RH.

Temperature: 303.15
Atmosphere: humidified synthetic air plus target gas
Geometry: pressed pellet Pt-mesh sensor
Context: guest-exposed pristine MOF 1 pellet
Measurement source: p006-p007 · Impedance Ammonia Sensing · Figures 8-9; Table S3

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
response bound for non-NH3 gases	responses lower than 19% toward most tested gases	—	—	Text Approximate	p007 · Impedance Ammonia Sensing · Figure 9
NH3 detection limit at 75% RH	5 ppm	—	—	SI Table Exact Reported	p003 · Table S3 · Table S3
NH3 detection limit at 85% RH	3 ppm	—	—	SI Table Exact Reported	p003 · Table S3 · Table S3
NH3 detection limit at 93% RH	1 ppm	—	—	SI Table Exact Reported	p003 · Table S3 · Table S3
NH3 detection limit at 98% RHMarked as a best value within this paper	1 ppm	—	—	SI Table Exact Reported	p003 · Table S3 · Table S3
lowest discerned NH3 response at 75% RH	11.21% toward 5 ppm NH3	—	—	Text Exact Reported	p006 · Impedance Ammonia Sensing · Figure 8
lowest discerned NH3 response at 85% RH	6.41% toward 3 ppm NH3	—	—	Text Exact Reported	p006 · Impedance Ammonia Sensing · Figure 8
lowest discerned NH3 response at 93% RH	2.32% toward 1 ppm NH3	—	—	Text Exact Reported	p006 · Impedance Ammonia Sensing · Figure 8
lowest discerned NH3 response at 98% RH	21.14% toward 1 ppm NH3	—	—	Text Exact Reported	p006 · Impedance Ammonia Sensing · Figure 8
gas response to 25 ppm NH3 at 75% RH	30.09%	—	—	Text Rounded Reported	p006 · Impedance Ammonia Sensing · Figure 8
gas response to 25 ppm NH3 at 85% RH	143%	—	—	Text Exact Reported	p006 · Impedance Ammonia Sensing · Figure 8
gas response to 25 ppm NH3 at 93% RH	193%	—	—	Text Exact Reported	p006 · Impedance Ammonia Sensing · Figure 8
gas response to 25 ppm NH3 at 98% RHMarked as a best value within this paper	243%	—	—	Text Exact Reported	p006 · Impedance Ammonia Sensing · Figure 8
NH3 selectivity ratio versus acetone	S = 83.5	—	—	Text Exact Reported	p007 · Impedance Ammonia Sensing · Figure 9
NH3 selectivity ratio versus benzene	S = 96.8	—	—	Text Exact Reported	p007 · Impedance Ammonia Sensing · Figure 9
NH3 selectivity ratio versus CO	S = 96.8	—	—	Text Exact Reported	p007 · Impedance Ammonia Sensing · Figure 9
NH3 selectivity ratio versus CO2	S = 19.74	—	—	Text Exact Reported	p007 · Impedance Ammonia Sensing · Figure 9
NH3 selectivity ratio versus EtOH	S = 14.24	—	—	Text Exact Reported	p007 · Impedance Ammonia Sensing · Figure 9
NH3 selectivity ratio versus H2	S = 96.0	—	—	Text Exact Reported	p007 · Impedance Ammonia Sensing · Figure 9
NH3 selectivity ratio versus H2S	S = 13.32	—	—	Text Exact Reported	p007 · Impedance Ammonia Sensing · Figure 9
NH3 selectivity ratio versus MeOH	S = 12.74	—	—	Text Exact Reported	p007 · Impedance Ammonia Sensing · Figure 9
NH3 selectivity ratio versus N2	S = 98.8	—	—	Text Exact Reported	p007 · Impedance Ammonia Sensing · Figure 9
NH3 selectivity ratio versus O2	S = 100.8	—	—	Text Exact Reported	p007 · Impedance Ammonia Sensing · Figure 9
SI comparative table gas response at 75% RH	30% (to 25 ppm)	—	—	SI Table Exact Reported	p003 · Table S3 · Table S3
SI comparative table gas response at 85% RH	143% (to 25 ppm)	—	—	SI Table Exact Reported	p003 · Table S3 · Table S3
SI comparative table gas response at 93% RH	193% (to 25 ppm)	—	—	SI Table Exact Reported	p003 · Table S3 · Table S3
SI comparative table gas response at 98% RH	243% (to 25 ppm)	—	—	SI Table Exact Reported	p003 · Table S3 · Table S3

Electrochemical impedance ammonia sensing; PARSTAT 2273 in homemade chamber with Pt mesh electrodes

MOF 1 pellet during humid NH3 exposure · Pellet

30 deg C, 75/85/93/98% RH, NH3 concentrations 0-25 ppm in dry synthetic air/water vapour stream.

Temperature: 303.15
Atmosphere: humidified synthetic air plus NH3
Geometry: pressed pellet in Pt mesh anode/cathode testing chamber
Context: guest-loaded MOF 1 pellet during NH3 exposure
Measurement source: p002-p006 · Gas Sensor Characterizations; Impedance Ammonia Sensing · Figure 1; Table 3; Figure 7

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
impedance under 10 ppm NH3 at 75% RH and 30 deg C	7.44e+05 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 15 ppm NH3 at 75% RH and 30 deg C	6.9e+05 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 20 ppm NH3 at 75% RH and 30 deg C	6.78e+05 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 25 ppm NH3 at 75% RH and 30 deg C	6.48e+05 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 5 ppm NH3 at 75% RH and 30 deg C	7.58e+05 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 10 ppm NH3 at 85% RH and 30 deg C	1.37e+05 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 15 ppm NH3 at 85% RH and 30 deg C	1.14e+05 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 20 ppm NH3 at 85% RH and 30 deg C	9.34e+04 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 25 ppm NH3 at 85% RH and 30 deg C	8.67e+04 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 3 ppm NH3 at 85% RH and 30 deg C	1.98e+05 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 5 ppm NH3 at 85% RH and 30 deg C	1.85e+05 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 10 ppm NH3 at 93% RH and 30 deg C	1.1e+05 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 15 ppm NH3 at 93% RH and 30 deg C	8.61e+04 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 1 ppm NH3 at 93% RH and 30 deg C	1.69e+05 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 20 ppm NH3 at 93% RH and 30 deg C	7.31e+04 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 25 ppm NH3 at 93% RH and 30 deg C	5.89e+04 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 3 ppm NH3 at 93% RH and 30 deg C	1.47e+05 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 5 ppm NH3 at 93% RH and 30 deg C	1.32e+05 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 10 ppm NH3 at 98% RH and 30 deg C	1.79e+04 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 15 ppm NH3 at 98% RH and 30 deg C	1.52e+04 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 1 ppm NH3 at 98% RH and 30 deg C	3.4e+04 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 20 ppm NH3 at 98% RH and 30 deg C	1.31e+04 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 25 ppm NH3 at 98% RH and 30 deg C	1.2e+04 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 3 ppm NH3 at 98% RH and 30 deg C	2.81e+04 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3
impedance under 5 ppm NH3 at 98% RH and 30 deg C	2.37e+04 ohm	—	—	Table Exact Reported	p005-p006 · Table 3 · Table 3

Dynamic response/recovery cycling from impedance versus time

MOF 1 pellet during humid NH3 exposure · Pellet

25 ppm NH3 at 30 deg C and 75-98% RH for response time; repeated cycling at 30 deg C and 98% RH.

Temperature: 303.15
Atmosphere: humidified NH3 and recovery under humid water vapour/air
Geometry: pressed pellet sensor
Context: guest-loaded/recovered MOF 1 pellet
Measurement source: p012 · Figures S16-S17 · Figure S16; Figure S17

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ammonia removal in air	0.5 h in air	—	—	Text Exact Reported	p006 · Impedance Ammonia Sensing
ammonia removal under vacuum	5 min in vacuum	—	—	Text Exact Reported	p006 · Impedance Ammonia Sensing
recovery time after NH3 blown out	within 10 min	—	—	Text Approximate	p006 · Impedance Ammonia Sensing · Figure S17
response time to 25 ppm NH3 at 75% RH	nearly 13 min	—	—	Text Approximate	p005 · Impedance Ammonia Sensing · Figure S16
response time to 25 ppm NH3 at 85% RH	nearly 12 min	—	—	Text Approximate	p005 · Impedance Ammonia Sensing · Figure S16
response time to 25 ppm NH3 at 93% RH	nearly 10 min	—	—	Text Approximate	p005 · Impedance Ammonia Sensing · Figure S16
response time to 25 ppm NH3 at 98% RH	nearly 8 min	—	—	Text Approximate	p005 · Impedance Ammonia Sensing · Figure S16
reversible response cycles	more than 10 successive cycles	—	—	Text Range	p006 · Impedance Ammonia Sensing · Figure S17