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Liu L, Zhao J, Jin Z, Liu F, Zhao D, Liu Z, Wang F, Wang Z, Liu J, Wu L. NO 2-Sensitive SnO 2 Nanoparticles Prepared Using a Freeze-Drying Method. MATERIALS (BASEL, SWITZERLAND) 2024; 17:3714. [PMID: 39124379 PMCID: PMC11313386 DOI: 10.3390/ma17153714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2024] [Revised: 07/19/2024] [Accepted: 07/22/2024] [Indexed: 08/12/2024]
Abstract
The n-type semiconductor SnO2 with a wide band gap (3.6 eV) is massively used in gas-sensitive materials, but pure SnO2 still suffers from a high operating temperature, low response, and tardy responding speed. To solve these problems, we prepared small-sized pure SnO2 using hydrothermal and freeze-drying methods (SnO2-FD) and compared it with SnO2 prepared using a normal drying method (SnO2-AD). The sensor of SnO2-FD had an ultra-high sensitivity to NO2 at 100 °C with excellent selectivity and humidity stability. The outstanding gas sensing properties are attributed to the modulation of energy band structure and the increased carrier concentration, making it more accessible for electron exchange with NO2. The excellent gas sensing properties of SnO2-FD indicate its tremendous potential as a NO2 sensor.
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Affiliation(s)
- Lin Liu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan 250061, China; (L.L.); (Z.J.); (F.L.); (D.Z.); (F.W.); (Z.W.); (J.L.)
| | - Jinbo Zhao
- School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China;
| | - Zhidong Jin
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan 250061, China; (L.L.); (Z.J.); (F.L.); (D.Z.); (F.W.); (Z.W.); (J.L.)
| | - Fei Liu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan 250061, China; (L.L.); (Z.J.); (F.L.); (D.Z.); (F.W.); (Z.W.); (J.L.)
| | - Dewen Zhao
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan 250061, China; (L.L.); (Z.J.); (F.L.); (D.Z.); (F.W.); (Z.W.); (J.L.)
| | - Zhengyang Liu
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China;
| | - Fenglong Wang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan 250061, China; (L.L.); (Z.J.); (F.L.); (D.Z.); (F.W.); (Z.W.); (J.L.)
| | - Zhou Wang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan 250061, China; (L.L.); (Z.J.); (F.L.); (D.Z.); (F.W.); (Z.W.); (J.L.)
| | - Jiurong Liu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan 250061, China; (L.L.); (Z.J.); (F.L.); (D.Z.); (F.W.); (Z.W.); (J.L.)
| | - Lili Wu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan 250061, China; (L.L.); (Z.J.); (F.L.); (D.Z.); (F.W.); (Z.W.); (J.L.)
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Wei Z, Qin C, Yang X, Zhu L, Zhao X, Cao J, Wang Y. Surface modification of Co 3O 4 nanosheets through Cd-doping for enhanced CO sensing performance. Mikrochim Acta 2024; 191:234. [PMID: 38568389 DOI: 10.1007/s00604-024-06326-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 03/23/2024] [Indexed: 05/12/2024]
Abstract
The detection of hazardous CO gas is an important research content in the domain of the Internet of Things (IoT). Herein, we introduced a facile metal-organic frameworks (MOFs)-templated strategy to synthesize Cd-doped Co3O4 nanosheets (Cd-Co3O4 NSs) aimed at boosting the CO-sensing performance. The synthesized Cd-Co3O4 NSs feature a multihole nanomeshes structure and a large specific surface area (106.579 m2·g-1), which endows the sensing materials with favorable gas diffusion and interaction ability. Furthermore, compared with unadulterated Co3O4, the 2 mol % Cd-doped Co3O4 (2% Cd-Co3O4) sensor exhibits enhanced sensitivity (244%) to 100 ppm CO at 200 °C and a comparatively low experimental limit of detection (0.5 ppm/experimental value). The 2% Cd-Co3O4 NSs show good selectivity, reproducibility, and long-term stability. The improved CO sensitivity signal is probably owing to the stable nanomeshes construction, high surface area, and rich oxygen vacancies caused by cadmium doping. This study presents a facile avenue to promote the sensing performance of p-type metal oxide semiconductors by enhancing the surface activity of Co3O4 combined with morphology control and component regulation.
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Affiliation(s)
- Zhanxiang Wei
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, 454000, China
| | - Cong Qin
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, 454000, China.
| | - Xuhui Yang
- President's Office, Henan Polytechnic University, Jiaozuo, 454000, China
| | - Linghao Zhu
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, 454000, China
| | - Xiaoyan Zhao
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, 454000, China
| | - Jianliang Cao
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, 454000, China
| | - Yan Wang
- College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, China.
- State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization, Henan Polytechnic University, Jiaozuo, 454000, China.
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Green synthesis of Co3O4 nanoparticles using psyllium husk (Plantago Ovata) and application as electrocatalyst for oxygen evolution reaction. J Electroanal Chem (Lausanne) 2023. [DOI: 10.1016/j.jelechem.2023.117218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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