@Article{es8d504, 
author="Ul-Islam, Mazhar Ul and Ali, Jawad and Khan, Waliullah and Haider, Adnan and Shah, Nasrullah and Ahmad, Md. Wasi and Ullah, Muhammad Wajid and Yang, Guang", 
title="Fast 4-nitrophenol Reduction Using Gelatin Hydrogel Containing Silver Nanoparticles", 
journal="Engineered Science", 
year="2019", 
volume="8", 
pages="19-24", 
abstract="The current study reports the synthesis of gelatin hydrogel containing silver nanoparticles (AgNPs) and its role as a catalyst. A porous gelatin hydrogel, with pore size of 15-100 nm, was prepared by cooling its hot solution to room temperature with glutaraldehyde as crosslinker. The gelatin hydrogel was immersed in 1 mM silver nitrate solution for 24 h through ex-situ impregnation. The impregnation of AgNPs was confirmed through the field-emission scanning electron microscopy (FE-SEM) which showed the uniform dispersion of nanoparticles on the hydrogel surface and partial impregnation into the matrix. Thermogravimetric analysis (TGA) showed the impregnation of 9 wt% of AgNPs in the hydrogel composite which also contributed to its improved thermal properties. X-ray diffraction (XRD) analysis confirmed the amorphous nature of gelatin and addition of AgNPs. The AgNPs/gelatin hydrogel effectively reduced 4-nitrophenol by sodium tetrahydrorate at a reaction rate constant of 0.498 min-1. The prepared AgNPs/gelatin hydrogel could be used as a catalyst for other similar types of reactions.", 
issn="2576-9898", 
doi="10.30919/es8d504", 
url="http://dx.doi.org/10.30919/es8d504" 
}