TY  - JOUR 
AU  - Ul-Islam, Mazhar Ul 
AU  - Ali, Jawad 
AU  - Khan, Waliullah 
AU  - Haider, Adnan 
AU  - Shah, Nasrullah 
AU  - Ahmad, Md. Wasi 
AU  - Ullah, Muhammad Wajid 
AU  - Yang, Guang 
PY  - 2019 
T1  - Fast 4-nitrophenol Reduction Using Gelatin Hydrogel Containing Silver Nanoparticles 
JO  - Engineered Science 
SP  - 19 
EP  - 24 
VL  - 8 
AB  - 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.SN  - 2576-9898 
UR  - http://dx.doi.org/10.30919/es8d504 
DO  - 10.30919/es8d504 
ID  - es8d504