A novel, green, one-pot and energy efficient route has been developed for the synthesis of gold nanoparticles by natural sunlight irradiation, and they were utilized effectively for the colorimetric detection of Ni 2+ and Co 2+ ions.
A simple, green and cost-effective method has been developed for the synthesis of AgNPs under natural sunlight irradiation and the synthesized AgNPs has been used as an effective colorimetric probe for the detection of Hg2+ions in aqueous medium.