Two-Dimensional Dy<sub>2</sub>O<sub>3</sub>-Pd-PDA/rGO Heterojunction Nanocomposite: Synergistic Effects of Hybridisation, UV Illumination and Relative Humidity on Hydrogen Gas Sensing
A two-dimensional (2D) Dy<sub>2</sub>O<sub>3</sub>-Pd-PDA/rGO heterojunction nanocomposite has been synthesised and tested for hydrogen (H<sub>2</sub>) gas sensing under various functioning conditions, including different H<sub>2</sub> concentrations (...
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MDPI AG
2022-02-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/10/2/78 |
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| author | Hanie Hashtroudi Aimin Yu Saulius Juodkazis Mahnaz Shafiei |
| author_facet | Hanie Hashtroudi Aimin Yu Saulius Juodkazis Mahnaz Shafiei |
| author_sort | Hanie Hashtroudi |
| collection | DOAJ |
| description | A two-dimensional (2D) Dy<sub>2</sub>O<sub>3</sub>-Pd-PDA/rGO heterojunction nanocomposite has been synthesised and tested for hydrogen (H<sub>2</sub>) gas sensing under various functioning conditions, including different H<sub>2</sub> concentrations (50 ppm up to 6000 ppm), relative humidity (up to 25 %RH) and working temperature (up to 200 °C). The material characterisation of Dy<sub>2</sub>O<sub>3</sub>-Pd-PDA/rGO nanocomposite performed using various techniques confirms uniform distribution of Pd NPs and 2D Dy<sub>2</sub>O<sub>3</sub> nanostructures on multi-layered porous structure of PDA/rGO nanosheets (NSs) while forming a nanocomposite. Moreover, fundamental hydrogen sensing mechanisms, including the effect of UV illumination and relative humidity (%RH), are investigated. It is observed that the sensing performance is improved as the operating temperature increases from room temperature (RT = 30 °C) to the optimum temperature of 150 °C. The humidity effect investigation revealed a drastic enhancement in sensing parameters as the %RH increased up to 20%. The highest response was found to be 145.2% towards 5000 ppm H<sub>2</sub> at 150 °C and 20 %RH under UV illumination (365 nm). This work offers a highly sensitive and selective hydrogen sensor based on a novel 2D nanocomposite using an environmentally friendly and energy-saving synthesis approach, enabling us to detect hydrogen molecules experimentally down to 50 ppm. |
| first_indexed | 2024-03-09T22:19:18Z |
| format | Article |
| id | doaj.art-82a12ff09ab941d4a0b0e92823755554 |
| institution | Directory Open Access Journal |
| issn | 2227-9040 |
| language | English |
| last_indexed | 2024-03-09T22:19:18Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Chemosensors |
| spelling | doaj.art-82a12ff09ab941d4a0b0e928237555542023-11-23T19:17:33ZengMDPI AGChemosensors2227-90402022-02-011027810.3390/chemosensors10020078Two-Dimensional Dy<sub>2</sub>O<sub>3</sub>-Pd-PDA/rGO Heterojunction Nanocomposite: Synergistic Effects of Hybridisation, UV Illumination and Relative Humidity on Hydrogen Gas SensingHanie Hashtroudi0Aimin Yu1Saulius Juodkazis2Mahnaz Shafiei3School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Melbourne 3122, AustraliaSchool of Science, Computing and Engineering Technologies, Swinburne University of Technology, Melbourne 3122, AustraliaSchool of Science, Computing and Engineering Technologies, Swinburne University of Technology, Melbourne 3122, AustraliaSchool of Science, Computing and Engineering Technologies, Swinburne University of Technology, Melbourne 3122, AustraliaA two-dimensional (2D) Dy<sub>2</sub>O<sub>3</sub>-Pd-PDA/rGO heterojunction nanocomposite has been synthesised and tested for hydrogen (H<sub>2</sub>) gas sensing under various functioning conditions, including different H<sub>2</sub> concentrations (50 ppm up to 6000 ppm), relative humidity (up to 25 %RH) and working temperature (up to 200 °C). The material characterisation of Dy<sub>2</sub>O<sub>3</sub>-Pd-PDA/rGO nanocomposite performed using various techniques confirms uniform distribution of Pd NPs and 2D Dy<sub>2</sub>O<sub>3</sub> nanostructures on multi-layered porous structure of PDA/rGO nanosheets (NSs) while forming a nanocomposite. Moreover, fundamental hydrogen sensing mechanisms, including the effect of UV illumination and relative humidity (%RH), are investigated. It is observed that the sensing performance is improved as the operating temperature increases from room temperature (RT = 30 °C) to the optimum temperature of 150 °C. The humidity effect investigation revealed a drastic enhancement in sensing parameters as the %RH increased up to 20%. The highest response was found to be 145.2% towards 5000 ppm H<sub>2</sub> at 150 °C and 20 %RH under UV illumination (365 nm). This work offers a highly sensitive and selective hydrogen sensor based on a novel 2D nanocomposite using an environmentally friendly and energy-saving synthesis approach, enabling us to detect hydrogen molecules experimentally down to 50 ppm.https://www.mdpi.com/2227-9040/10/2/78two-dimensional Dy<sub>2</sub>O<sub>3</sub>-Pd-PDA/rGO heterojunction nanocompositeconductometric deviceshydrogen gas sensorsUV illuminationrelative humiditylow operating temperature |
| spellingShingle | Hanie Hashtroudi Aimin Yu Saulius Juodkazis Mahnaz Shafiei Two-Dimensional Dy<sub>2</sub>O<sub>3</sub>-Pd-PDA/rGO Heterojunction Nanocomposite: Synergistic Effects of Hybridisation, UV Illumination and Relative Humidity on Hydrogen Gas Sensing Chemosensors two-dimensional Dy<sub>2</sub>O<sub>3</sub>-Pd-PDA/rGO heterojunction nanocomposite conductometric devices hydrogen gas sensors UV illumination relative humidity low operating temperature |
| title | Two-Dimensional Dy<sub>2</sub>O<sub>3</sub>-Pd-PDA/rGO Heterojunction Nanocomposite: Synergistic Effects of Hybridisation, UV Illumination and Relative Humidity on Hydrogen Gas Sensing |
| title_full | Two-Dimensional Dy<sub>2</sub>O<sub>3</sub>-Pd-PDA/rGO Heterojunction Nanocomposite: Synergistic Effects of Hybridisation, UV Illumination and Relative Humidity on Hydrogen Gas Sensing |
| title_fullStr | Two-Dimensional Dy<sub>2</sub>O<sub>3</sub>-Pd-PDA/rGO Heterojunction Nanocomposite: Synergistic Effects of Hybridisation, UV Illumination and Relative Humidity on Hydrogen Gas Sensing |
| title_full_unstemmed | Two-Dimensional Dy<sub>2</sub>O<sub>3</sub>-Pd-PDA/rGO Heterojunction Nanocomposite: Synergistic Effects of Hybridisation, UV Illumination and Relative Humidity on Hydrogen Gas Sensing |
| title_short | Two-Dimensional Dy<sub>2</sub>O<sub>3</sub>-Pd-PDA/rGO Heterojunction Nanocomposite: Synergistic Effects of Hybridisation, UV Illumination and Relative Humidity on Hydrogen Gas Sensing |
| title_sort | two dimensional dy sub 2 sub o sub 3 sub pd pda rgo heterojunction nanocomposite synergistic effects of hybridisation uv illumination and relative humidity on hydrogen gas sensing |
| topic | two-dimensional Dy<sub>2</sub>O<sub>3</sub>-Pd-PDA/rGO heterojunction nanocomposite conductometric devices hydrogen gas sensors UV illumination relative humidity low operating temperature |
| url | https://www.mdpi.com/2227-9040/10/2/78 |
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