Design of experiment for optimization of nitrophenol reduction by green synthesized silver nanocatalyst
| Autor: | Shanku Denrah, Mitali Sarkar |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
General Chemical Engineering Nanoparticle 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Silver nanoparticle 0104 chemical sciences Catalysis Nanomaterials Nitrophenol chemistry.chemical_compound chemistry Chemical engineering Particle Degradation (geology) Response surface methodology 0210 nano-technology |
| Zdroj: | Chemical Engineering Research and Design. 144:494-504 |
| ISSN: | 0263-8762 |
| Popis: | Phenol derived molecules are considered as critical pollutants in the environment and need to be decontaminated to safeguard our mother Earth. This may sometimes be achieved by degradation using nanomaterials. Plant mediated biosynthesis of nanoparticles is truly encouraging for environmental safety as well as easy availability of precursor materials. The present report demonstrates the catalytic reduction of 4-nitrophenol using silver nanoparticle, synthesized from rhizome of Cyperus Rotundus. It is characterized by UV–vis and FTIR spectra, DLS, SEM-EDS, AFM, FESEM and TEM. The size of the particle is estimated to be in the range of 10–40 nm. Degradation pathway using NaBH4 and silver nanoparticle catalyst is followed under visible light. The influence of variables such as time, dose of NaBH4, 4-nitrophenol (4-NP) and silver nanoparticle was investigated following response surface methodology. A mathematical model is built up to correlate the interactive influences of the significant variables and the reduction. The mutual interactions of these variables are mapped in the design space by response surface and contour plots. The process follows a pseudo first-order kinetic model and the activation energy was evaluated to be 53.3 kJ mol−1. The conversion of 4-NP–4-AP was confirmed from NMR studies. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |
Full Text from ScienceDirect