Synthesized a-MoO3 Nanoparticles Show Promising Sensing and Photocatalytic Applications

Scientists at the University of Allahabad have successfully synthesized a-MoO3 nanoparticles using the chemical co-precipitation method, which have shown great potential for sensing and photocatalytic applications. The nanoparticles demonstrated excellent selectivity and stability towards ammonia sensing and efficient photocatalytic activity in the degradation of organic dyes. This breakthrough research has significant implications for the development of more effective and eco-friendly materials for wastewater treatment and other environmental applications.

Key Takeaways:

• The researchers synthesized a-MoO3 nanoparticles using the chemical co-precipitation method, which is a cost-effective and scalable approach.
• The synthesized nanoparticles were coated on FTO-based interdigitated electrodes for ammonia sensing, which showed a response and recovery time of 8 seconds and 11 seconds, respectively, at 95% relative humidity.
• The nanoparticles demonstrated high selectivity and stability towards ammonia sensing, with a selectivity ratio of 95:3 towards ammonia and other gases.
• The photocatalytic activity of the nanoparticles was studied using the photodegradation of methylene blue and methyl orange under visible light irradiation, with a first-order reaction rate constant of 0.02434 min-1 and 0.01111 min-1, respectively.
• The maximum degradation efficiency for methylene blue and methyl orange was calculated to be 95% and 73%, respectively, at an initial concentration of 10 mg/L.
• The synthesized a-MoO3 nanoparticles were found to be an effective NH3 sensor as well as an efficient photocatalyst in organic dye degradation.
• This research has been peer-reviewed and published in the journal Colloids and Surfaces A Physicochemical and Engineering Aspects.

Statistics:

• Response time of a-MoO3 based sensor for 500 ppm of NH3 = 8 seconds
• Recovery time of a-MoO3 based sensor for 500 ppm of NH3 = 11 seconds
• First-order reaction rate constant for MB dye = 0.02434 min-1
• First-order reaction rate constant for MO dye = 0.01111 min-1
• Maximum degradation efficiency for MB = 95%
• Maximum degradation efficiency for MO = 73%
• Initial concentration of MB and MO = 10 mg/L

Sources:

• [1] NewsRx. Studies from University of Allahabad Have Provided New Information about Nanoparticles (Hierarchical A-moo 3 : a Versatile Eco-friendly Material for Humidity-assisted Ammonia Sensing and Efficient Catalytic Activity In Wastewater ...). Nanotechnology Weekly. November 6, 2023; p 4782.
• [2] Hierarchical A-moo 3 : a Versatile Eco-friendly Material for Humidity-assisted Ammonia Sensing and Efficient Catalytic Activity In Wastewater Treatment. Colloids and Surfaces A Physicochemical and Engineering Aspects, 2023;676.