APPLICATION OF METAL OXIDE NANOPARTICLES AS SENSOR OF SULPHIDE GAS (H2S, CS2) AND SO2 GAS

• Main Author: JULIASIH (NIM:30513300), NUROCHMA
• Format: Dissertations
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/29814
• Institution: Institut Teknologi Bandung

The application of nanoparticles as gas sulfide sensor (CS2, H2S) and SO2 gas in this research gave the positive results for the development of pollutant gas detection methods. Synthesis of thin layer nanoparticle with the method of Liquid Chemical Deposition becomes a good alternative because its manufacture does not require too high costs and power, and the results are reliable. Characterization of nanoparticles and their application as gas sulfide (CS2, H2S) and SO2 sensors can be carried out by UV/VIS/NIR spectrophotometer with diffusion reflectance, and all applications to standard gases are carried out at ambient temperatures. In this study already synthesized SnO2, ZnO, Cu2O, Ag2O, CeO2, SnO2-ZnO, SnO2-Cu2O, SnO2-Ag2O, SnO2-CeO2, and the optimum annealing temperature for all variants was 500 ºC. <br /> <br /> <br /> SnO2 size was obtained is 15-71 nm. Detection of SnO2 to H2S is indicated by a shift of (formula) from 1274 nm to 1448 nm, detection limit of 18.62 &#956;mol, sensitivity up to 0.810% reflectance/&#956;mol H2S. Detection of CS2 was shown by a shift of (formula) from 1274 nm to 1428 nm, detection limit of 14.13 &#956;mol, the sensitivity up to 0.425% reflectance/&#956;mol CS2. SO2 detection is indicated by a shift of (formula) from 1274 nm to 1625 nm, detection limit of 4.53 &#956;mol, and sensitivity up to 1.276% reflectance/&#956;mol SO2. The best sensitivity of SnO2 is for CS2 detection. Selectivity to mixed gases is indicated by the specific SnO2 to H2S response at (formula) 1448 nm, CS2 at 1428 nm, SO2 at 1625 nm, and no interference occurs when measuring the mixed gases in each of these (formula). <br /> <br /> <br /> ZnO which was successfully synthesized was 10-92 nm. Detection of SnO2 to H2S is indicated by a shift of (formula) from 1564 nm to 1668 nm, detection limit of 15.46 &#956;mol, sensitivity up to 0.648% reflectance/mol H2S. Detection of CS2 was shown with a shift of (formula) from 1566 nm to 1768 nm, detection limit of 12.72 &#956;mol, sensitivity up to 0.651% reflectance/&#956;mol CS2. Detection of SO2 is indicated by a shift of (formula) from 1564 nm to 1868 nm, detection limit up to 2.47 &#956;mol, sensitivity up to 3.605% reflectance/&#956;mol SO2. Selectivity to mixed gases is shown by the response to specific H2S at 1668 nm, CS2 at 1566 nm, SO2 at 1868 nm, no interference occurs in this analysis. <br /> <br /> <br /> The Cu2O produced in this study was 34-81 nm. The application of H2S was indicated by a shift of (formula) from 1353 nm to 1464 nm, a detection limit of 11.52 &#956;mol, the sensitivity up to 0.612% reflectance/&#956;mol H2S. The application to CS2 is indicated by a shift of (formula) from 1353 nm to 1544 nm, detection limit of 10.76 &#956;mol, the sensitivity of up to 0.543% reflectance/&#956;mol CS2. The application to SO2 is indicated by a shift of (formula)from 1353 nm to 1788 nm, detection limit of 1.22 &#956;mol, a sensitivity of up to 3.831% reflectance/&#956;mol SO2. Selectivity to mixed gases is shown by response to specific H2S at (formula)1464 nm, CS2 at 1544 nm, SO2 at 1788 nm, and no interference occurs when tested on each of these (formula). <br /> <br /> <br /> Ag2O has been successfully synthesized in this study with particle size 4-75 nm. Application to H2S is indicated by a shift of (formula) from 1246 nm to 1651 nm, detection limit of 9.30 &#956;mol, sensitivity up to 0.472% reflectance/&#956;mol H2S. Application to CS2 is indicated by a shift of(formula) from 1246 nm to 1678 nm, limit of detection up to 18.37 &#956;mol, sensitivity up to 0.459% reflectance/&#956;mol CS2. The application of SO2 gas is shown with a shift of(formula) 1246 nm to 1711 nm, a detection limit of up to 2.16 &#956;mol, a sensitivity up to 2.082% reflectance/&#956;mol of SO2 gas. Selectivity to mixed gases is indicated by the response to H2S gases occurring specifically at 1651 nm, CS2 at 1678 nm, SO2 at 1711 nm, and no interference occurs when the mixture is tested on each of these(formula). <br /> <br /> <br /> CeO2 produced in this study was 13-72 nm. Application to H2S is indicated by a shift of (formula) from 1288 nm to 1336 nm, detection limit of 14.58 &#956;mol, sensitivity up to 0.542% reflectance/&#956;mol H2S. The application to CS2 is shown by a shift of (formula) from 1288 nm to 1346 nm,the detection limit is 10.95 &#956;mol, the sensitivity is up to 0.472% reflectance/&#956;mol CS2. Application to SO2 is shown by a shift of(formula)from 1288 nm to 1444 nm, limit of detection 2.26 &#956;mol, sensitivity up to 1.650% reflectance/&#956;mol SO2. Selectivity to mixed gases is shown by the response to specific H2S at(formula) 1336 nm, CS2 at 1346 nm, SO2 at 1444 nm, and no interference occurs when tested on each of these specific(formula). <br /> <br /> <br /> SnO2-ZnO (1:1) obtained was 13-68 nm. The application of H2S is indicated by a shift of (formula) from 1290 nm to 1517 nm, detection limit of 9.92 &#956;mol, sensitivity up to 0.486% reflectance/&#956;mol H2S. The application of CS2 is indicated by a shift of (formula) from 1290 nm to 1636 nm, the limit of detection is 3.91 &#956;mol, the sensitivity is up to 0.475% reflectance/&#956;mol CS2. The application to SO2 is indicated by a shift of (formula) from 1290 nm to 1722 nm, detection limit of up to 1.04 &#956;mol, sensitivity up to 3.501% reflectance/&#956;mol SO2. Selectivity to mixed gases is shown by the response to H2S to occur specifically at (formula) 1517 nm, CS2 at 1636 nm, SO2 at 1722 nm. Interference does not occur in this selectivity test. <br /> <br /> <br /> SnO2-Cu2O (1:1) was successfully synthesized and produced particles measuring 43-93 nm. Applications can be made on this sensor variant, and the results for H2S are indicated by a shift of (formula) from 1312 nm to 1478 nm, a detection limit of 9.06 &#956;mol, the sensitivity is up to 0.514% reflectance/&#956;mol H2S. The application of CS2 is indicated by a shift of (formula) from 1312 nm to 1414 nm, a detection limit of 12.36 &#956;mol, a sensitivity up to 0.482% reflectance/&#956;mol CS2. SO2 gas application is shown with a shift of (formula) from 1312 nm to 1756 nm, detection limit of up to 2.70 &#956;mol, sensitivity up to 3.290% reflectance/&#956;mol SO2. Selectivity to mixed gases is indicated by the response to specific H2S at a wavelength of 1478 nm, CS2 at 1414 <br /> <br /> <br /> nm, SO2 at 1756 nm, and interference didn’t occur in the mixed gas test for each (formula). <br /> <br /> <br /> SnO2-Ag2O (1:1) obtained is 4-75 nm. Application to H2S is indicated by a shift of (formula) from 1365 nm to 1528 nm, detection limit of 18.24 &#956;mol, sensitivity up to 0.426% reflectance/&#956;mol H2S. Application to CS2 is indicated by a shift of (formula) from 1365 nm to 1587 nm, limit of detection is 11.85 &#956;mol, sensitivity up to 0.487% reflectance/&#956;mol CS2. Application to SO2 gas is indicated by a shift of 65 1365 nm to 1617 nm, detection limit of 0.37 &#956;mol, sensitivity up to 5.041% reflectance/&#956;mol SO2. Selectivity to mixed gases is indicated by the response to specific H2S at (formula) 1528 nm, CS2 at 1587 nm, SO2 at 1617 nm, and interference didn’t occur in the mixed gas test for each (formula). <br /> <br /> <br /> The SnO2-CeO2 (1:1) synthesized in this study measures 19-69 nm. Application to H2S is indicated by a shift of (formula) from 1456 nm to 1576 nm, a detection limit up to 8.82 &#956;mol, sensitivity up to 0.448% reflectance/&#956;mol H2S The application to CS2 is indicated by a shift of (formula) from 1456 nm to 1688 nm, detection limit up to 9 77 &#956;mol, the sensitivity is 0.442% reflectance/&#956;mol CS2 Application to SO2 gas is indicated by a shift of (formula) from 1456 nm to 1617 nm, detection limit of up to 0.12 &#956;mol, sensitivity up to 2.782% reflectance/&#956;mol SO2. Selectivity to mixed gases is shown by the response to H2S that occurs specifically at a wavelength of 1576 nm, CS2 at 1688 nm, SO2 at 1617 nm, and no interference occurs when tested on each of these (formula) <br /> <br />