Cost-effective and eco-friendly synthesis of thermally stable Sr2+ doped Bi2S3 nanoflowers for efficient adsorption and visible-light-driven photocatalytic degradation of Rhodamine-B pollutant
Anjli Sharma , Ashima Makhija , Lalita Saini , Anil Ohlan , Sajjan Dahiya , R. Punia , A.S. Maan
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引用次数: 0
Abstract
Background
Rhodamine-B is a hazardous pollutant used in textile industries that has adverse effects on humans and aquatic life. So, there is need to develop cost-effective and efficient photocatalysts.
Methods
SrxBi2-xS3 nanoflowers with varying Sr contents have been synthesized using hydrothermal method and have been studied by TGA, XRD, Rietveld refinement, UV-DRS, FESEM with EDX, PL and Zeta potential. The photocatalytic performance has been estimated by degrading RhB pollutants under visible light illumination.
Significant Findings
The morphology of the prepared SrxBi2-xS3 nanoparticles has been observed to be flower-like. They are stable up to 645 °C as assessed by TGA. Their Rietveld refinement revealed the orthorhombic crystal structure. Eg determined using DRS falls in the range of 1.45 eV to 1.37 eV, while PL studies corroborate decreased e−-h+ pairs recombination in Sr doped samples compared to pure. The negative value of surface potential ascertained using zeta potential makes them suitable for cationic dye. The impact of dopant concentration on RhB under visible light exposure reveals x = 0.06 exhibits the highest degradation efficiency (η ∼ 92 %) in 240 min utilizing 5 mg/100 ml solution of 10 ppm dye concentration. The adsorption kinetic model is of 1st order, while photodegradation kinetics is governed by Zeroth order model.
期刊介绍:
Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.