Sedaghati, Nasrin and Habibi-Yangjeh, Aziz and Asadzadeh-Khaneghah, Soheila and Ghosh, Srabanti (2021) Integration of oxygen vacancy rich-TiO2 with BiOI and Ag6Si2O7: Ternary p-n-n photocatalysts with greatly increased performances for degradation of organic contaminants. Colloids and Surfaces A-Physicochemical and Engineering Aspects , 613. Art No-126101. ISSN 0927-7757

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Abstract

Photocatalysis process is a prominent approach for the degradation of organic contaminants. However, the swift recombination of charge carriers commonly limits the photoactivity. Hence, to create a suitable nanocomposite for removal of pollutants, BiOI and Ag6Si2O7 particles were anchored on the oxygen vacancy rich-TiO2 (abbreviated as OVs-TO) through a simple approach to construct the OVs-TO/BiOI/Ag6Si2O7 nanocomposites. Then, various structural features of the systems were assayed with different characterization tools. It was found that the photocatalyst with 20 wt% and 30 wt% of BiOI and Ag6Si2O7 exhibits the excellent performance in removal of RhB, which are about 194, 18.1, and 9.59-times higher than the TiO2 (abbreviated as TO), OVs-TO, and OVs-TO/BiOI (20 %) nanomaterials, respectively. This supreme improved photodegradation activity was allocated to the formed p-n-n heterojunctions between the semiconductors, impressive segregation of charges, significant visible-light absorption of OVs-TO, BiOI, and Ag6Si2O7, and textural enhancement. A suitable mechanism was also offered through the outcomes of Mott-Schottky and the quenching experiments. This research work illustrated that the ternary p-n-n photocatalyst could be efficacious for ameliorating the visible-light photocatalytic ability for environmental and energy applications.

Item Type:	Article
Subjects:	Engineering Materials
Divisions:	Fuel Cell and Battery
Depositing User:	Bidhan Chaudhuri
Date Deposited:	14 Dec 2021 07:04
Last Modified:	14 Dec 2021 07:04
URI:	http://cgcri.csircentral.net/id/eprint/5241

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