Designing of three-dimensional hierarchical Co3O4@g-C3N4 nanostructure with highest surface area for sensitive detection of NO2 gas at room temperature
Ullah M. Makasana J. Kumari B. Rekha M.M. Singh M. Ibrahim S.M. Mahdi M.H. Abduldayeva A. Alshgari R.A. Zhengxin L.
March 2025Springer Nature
Emergent Materials
2025#8Issue 31727 - 1741 pp.
The increasing demand for advance gas-sensing materials to monitor the NO2 gas in environment at low-temperature has gain immense attention. So for this-purpose, in the present research-work, we have fabricated the three dimensional (3D) hierarchical nanostructure by the reaction of two dimensional (2D) Co3O4 nanosheets (NSs) with 2D g-C3N4 nanosheets (Co3O4@g-C3N4), via a simple hydrothermal synthetic method. The prepared hybrid nanostructure CNCO−2 sensor exhibited extensive sensing performances with excellent sensing response, fast response-recovery time of (29.4, 0.53s and 22.7 s) towards 50 ppm NO2 gas at RT. The sensor manifest lowest limit of detection (0.01 ppm or 10-ppb), with outstanding recycling capacity of (10-cycles) having almost same response and recovery time. Further, the sensor also shows prominent stability and reproducibility of (10-weeks), with superior selectivity towards NO2 gas as compared to other interfering gases. Thus, these impressive sensing properties of CNCO-2 sensor might be related to its 3D hierarchical structure with strong heterojunction layers by layers morphology, large surface area, powerful p-n synergism and exposed active sites, which not only helps in the large adsorption of gas molecules, but also facilitate in rich electron mobility across the hybrid nanostructure. This research work will open a new window to strengthen the effect of hetero-structure formation between Co3O4 and g-C3N4 NSs, for effective NO2 gas sensing in future.
Co3O4 NSs , g-C3N4 NSs , Hierarchical nanostructure , NO2 gas sensing , p-n heterojunction
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School of Material Science and Engineering, Henan University of Technology, Henan, Zhengzhou, 450001, China
Department of Chemistry, Faculty of Science, Marwadi University, Gujarat, Rajkot, 360003, India
NIMS School of Petroleum & Chemical Engineering, NIMS University Rajasthan, Jaipur, India
Department of Chemistry and Biochemistry, School of Sciences, JAIN (Deemed to be University), Karnataka, Bangalore, India
Department of Applied Sciences, Chandigarh Engineering College, Chandigarh Group of Colleges-Jhanjeri, Punjab, Mohali, 140307, India
Department of Optics Techniques, Health and Medical Techniques College, Alnoor University, Mosul, Iraq
College of Pharmacy, Ahl Al Bayt University, Kerbala, Iraq
Department of Research Institute of Preventive Medicine Named Acedemician E.Dalenov, Astana Medical University, Astana, 010000, Kazakhstan
Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
School of Material Science and Engineering
Department of Chemistry
NIMS School of Petroleum & Chemical Engineering
Department of Chemistry and Biochemistry
Department of Applied Sciences
Department of Optics Techniques
College of Pharmacy
Department of Research Institute of Preventive Medicine Named Acedemician E.Dalenov
Department of Chemistry
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