Size Dependent Catalytic Activity of Actinodaphne madraspatana Bedd Leaves Mediated Silver Nanoparticles
| Autor: | Indira Viswambaran Asharani, Dhananjayan Badma Priya |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Reducing agent
Inorganic chemistry 4-Nitrophenol Selective catalytic reduction 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Biochemistry Nanomaterial-based catalyst Silver nanoparticle 0104 chemical sciences Catalysis chemistry.chemical_compound Reaction rate constant chemistry General Materials Science Particle size 0210 nano-technology Nuclear chemistry |
| Zdroj: | Journal of Cluster Science. 28:1837-1856 |
| ISSN: | 1572-8862 1040-7278 |
| DOI: | 10.1007/s10876-017-1185-1 |
| Popis: | Green synthesis of metal nanoparticles using earth abundant materials in the absence of any toxic solvent, reducing agent and protecting group is one of the emerging areas of research in materials chemistry. Herein, we report a green method for the synthesis of silver nanoparticles (AgNPs) using Actinodaphne madraspatana Bedd leaf extract as reducing as well as stabilizing agent. To our delight, AgNPs of different sizes could be readily synthesized by simply changing the pH of plant extract and the average size of AgNPs were found to be 60, 35 and 20 nm at pH 6, 9 and 12 respectively. The efficacy of prepared AgNPs towards the catalytic reduction of 4-nitrophenol (4-NP) has been investigated and the nanocatalysts have demonstrated excellent catalytic activity as evidenced from the rate constants. The kinetics of reduction reaction follows Langmuir–Hinshelwood mechanism, based on which the rate constant ‘k’ was calculated. The effect of catalyst dosage, concentration of 4-NP, concentration of NaBH4 and size of AgNPs towards catalytic reduction of 4-NP has been systematically investigated. It was interesting to notice that the AgNPs have exhibited size dependent catalytic activity towards reduction of 4-NP and the catalytic activity was found to increase with decrease in particle size. |
| Databáze: | OpenAIRE |
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