TiO2@SiO2 nanoparticles for methylene blue removal and photocatalytic degradation under natural sunlight and low-power UV light

Mahanta, Urbashi and Khandelwal, Mudrika and Deshpande, Atul Suresh (2022) TiO2@SiO2 nanoparticles for methylene blue removal and photocatalytic degradation under natural sunlight and low-power UV light. Applied Surface Science, 576. pp. 1-11. ISSN 0169-4332

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Abstract

We have developed an efficient SiO2-TiO2 nanoparticle system with enhanced photocatalytic degradation under natural sunlight and low-power UV light. The SiO2-TiO2 system was synthesized by adding different mole ratios of SiO2 to TiO2, the ratios of 10:1, 5:1, and 2:1 have been used. SiO2-TiO2 nanoparticles with a 2:1 mole ratio showed enhanced photocatalytic degradation of methylene blue (MB) due to the presence of highly crystalline anatase TiO2 nanoparticles as well as good adsorption capacity due to the highly porous nature of samples. SiO2-TiO2 with a mole ratio of 5:1 showed the highest adsorption capacity of 88.6% after 30 min under dark conditions. Photocatalytic degradation of 90% and 85% was achieved for Si2Ti after 30 min in sunlight and UV light respectively. In addition, almost complete degradation of MB (98%) was obtained after 2 h in sunlight. © 2021

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IITH Creators:

IITH Creators	ORCiD
Khandelwal, Mudrika	https://orcid.org/0000-0001-9717-5381
Deshpande, Atul Suresh	https://orcid.org/0000-0003-0874-9502

Item Type:

Article

Additional Information:

The authors acknowledge the Indian Institute of Technology, Hyderabad for providing the necessary research infrastructure to carry out this work. The scanning electron microscope (JEOL JSM-7800F) used in this work was obtained from the funding provided by the Department of Science and Technology under DST-FIST program (Grant no. SR/FST/ETI-421/2016).

Uncontrolled Keywords:

Adsorption; Methylene blue; Photocatalytic activity; SiO2-TiO2; Sunlight

Subjects:

Others > Metallurgy Metallurgical Engineering
Materials Engineering > Materials engineering

Divisions:

Department of Material Science Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

14 Jul 2022 07:10

Last Modified:

14 Jul 2022 07:10