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Rohit, Kaur S, Hussain S, Park JY, Katoch V, Parkash B, Katoch A, Jamwal D. Size dependent dual functionality of CeO 2 quantum dots: A correlation among parameters for hydrogen gas sensor and pollutant remediation. CHEMOSPHERE 2024; 364:142959. [PMID: 39069101 DOI: 10.1016/j.chemosphere.2024.142959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Revised: 07/16/2024] [Accepted: 07/26/2024] [Indexed: 07/30/2024]
Abstract
The metal oxide-based nanostructures of variable size and shape are found effective in optimizing the gas sensing ability and pollutant degradation. The size induced lattice strain and large band gap in 3nm CeO2 quantum dots evolved the ability towards hydrogen gas sensing and dye degradation compared to nanopebbles and nanoparticles of sizes 15 ± 3, and 30 ± 12 nm. The smaller CeO2 quantum dots than Debye length was found underlying reason for nearly four times sensor response and selectivity towards reducing hydrogen gases than the oxidizing gases at 1-10 ppm level. The lattice strain calculated by Rietveld refinement and W-H analysis was found in-line with the size of CeO2 nanostructures. The enhancement in lattice strain and optical band gap (2.66, 2.78, and 2.89 eV) with decrease in size are found critical for determining the overall efficiency of CeO2 nanostructures for photocatalytic activity, attributed to the strong quantum confinement effect. The higher catalytic activity of 98 % was achieved CeO2 quantum dots in comparison to the 95 % and 94 % obtained for CeO2 nanopebbles and nanoparticles. The impact of change in degradation efficacy and gas sensing ability of different CeO2 nanomaterials is discussed in detail. This work offers a novel and simplistic method to produce CeO2 quantum dots as an efficient sensor for selective detection of H2 gas and photocatalyst. The correlation between size, Debye length, band gap, and lattice strain gives an insight for understanding the underlying detection mechanism for selective detection of reducing gas molecules and efficient pollutant remediation.
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Affiliation(s)
- Rohit
- Smart Nanomaterials and Sensor Laboratory, Centre for Nanoscience and Nanotechnology, UIEAST, Panjab University, Chandigarh, 160014, India
| | - Sandeep Kaur
- Smart Nanomaterials and Sensor Laboratory, Centre for Nanoscience and Nanotechnology, UIEAST, Panjab University, Chandigarh, 160014, India
| | - Sajjad Hussain
- Smart Nanomaterials and Sensor Laboratory, Centre for Nanoscience and Nanotechnology, UIEAST, Panjab University, Chandigarh, 160014, India
| | - Jae Young Park
- Heat & Surface Technology R&D Department, Korea Institute of Industrial Technology, Incheon, 21999, Republic of Korea
| | - Vibhav Katoch
- Smart Nanomaterials and Sensor Laboratory, Centre for Nanoscience and Nanotechnology, UIEAST, Panjab University, Chandigarh, 160014, India; Microfluidics Research Laboratory, Institute of Nano Science and Technology, Sahibzada Ajit Singh Nagar, Punjab, 140306, India
| | - Bhanu Parkash
- Microfluidics Research Laboratory, Institute of Nano Science and Technology, Sahibzada Ajit Singh Nagar, Punjab, 140306, India
| | - Akash Katoch
- Smart Nanomaterials and Sensor Laboratory, Centre for Nanoscience and Nanotechnology, UIEAST, Panjab University, Chandigarh, 160014, India.
| | - Deepika Jamwal
- Department Chemistry, University Institute of Sciences, Chandigarh University, Gharuan, Punjab, 140413, India; Sophisticated Analytical Instrumentation Facility (SAIF), Panjab University, Chandigarh, 160014, India.
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Jamwal D, Mutreja V, Mehta SK, Katoch A, Kim SS. Tungsten oxide nanostructures peculiarity and photocatalytic activity for the efficient elimination of the organic pollutant. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27891-5. [PMID: 37253911 DOI: 10.1007/s11356-023-27891-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 05/20/2023] [Indexed: 06/01/2023]
Abstract
The WO3 nanostructures were synthesized by a simple hydrothermal route in the presence of C14TAB and gemini-based twin-tail surfactant. The impact of using these special shape and size directing agents for the synthesis of nanostructures was observed in the form of different shapes and sizes. The WO3 web of chains type nanostructure was obtained using C14TAB in comparison to the cube-shaped nanoparticles through twin-tail surfactant. On contrary, the twin-tail surfactant provides sustainable and controlled growth of cube shape nanoparticles of size ~ 15 nm nearly half of the size ~ 35 nm obtained using conventional surfactant C14TAB, respectively. For the detailed structural features, the Williamson-Hall analysis method was implemented to find out the crystalline size and lattice strain of the prepared nanostructures. Owing to the strong quantum confinement effect, the WO3 cube-shaped nanoparticles with an optical band gap of 2.69 eV of the prepared nanoparticles showed excellent photocatalytic efficacy toward organic pollutant (fast green FCF) compared to the web of chain nanostructures with an optical band gap of 2.66 eV. The ability of the prepared systems to decompose the organic pollutant (fast green FCF) in water was tested under visible light irradiations. The percentage degradation was found to be 94% and 86% for WO3 cube-shaped nanoparticles and WO3 web of chains, respectively. The simplicity of the fabrication method and the high photocatalytic performance of the systems can be promising in environmental applications to treat water pollution.
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Affiliation(s)
- Deepika Jamwal
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India
| | - Vishal Mutreja
- Department of Chemistry, Chandigarh University, Mohali, 140413, India
| | - Surinder Kumar Mehta
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India
| | - Akash Katoch
- Centre for Nanoscience and Nanotechnology, University Institute of Science, Panjab University, Chandigarh, 160014, India.
| | - Sang Sub Kim
- Department of Materials Science and Engineering, Inha University, Incheon, 22212, Republic of Korea
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