Inorganic Chemistry Laboratory, Chemistry Department, Andalas University, Indonesia
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@article{JKSA24334, author = {Sry Wahyuni and Syukri Syukri and Syukri Arief}, title = {Green synthesis of Ag/TiO2 Nanocomposite Assisted by Gambier Leaf (Uncaria gambir Roxb) Extract}, journal = {Jurnal Kimia Sains dan Aplikasi}, volume = {22}, number = {6}, year = {2019}, keywords = {green synthesis; photocatalytic activity; Ag/TiO2; Uncaria gambir}, abstract = {Studies of green synthesis of nanoparticles mediated by plants extract is extensively explored and studied in recent time due to eco-friendliness, cost-effectiveness, and use a minimum amount of toxic chemicals in the process of inorganic material synthesis. In this study, the immobilization of silver nanoparticles on the surface of titanium dioxide (TiO 2 ) was carried out using Uncaria gambier Roxb. leaf extract as a silver ion (Ag + ) reducing agent. The synthesized Ag/TiO 2 nanocomposite was characterized by UV-Vis spectroscopy, X-ray diffraction (XRD), and Diffuse Reflectance Spectroscopy (DRS). The formation of silver nanoparticles was confirmed through UV-Vis spectroscopic analysis, which showed a silver surface plasmon resonance (SPR) band at 426 nm. The X-ray diffraction pattern shows that Ag can inhibit the transition of the anatase into rutile phase. The presence of Ag particles in TiO 2 can increase the absorption ability from an initial wavelength of 407 nm to 438 nm. Based on the results of Rhodamin B degradation, it can be seen that Ag/TiO 2 has a higher photocatalytic activity than bare TiO 2 with 99% percent degradation at 120 minutes of irradiation time.}, issn = {2597-9914}, pages = {250--255} doi = {10.14710/jksa.22.6.250-255}, url = {https://ejournal.undip.ac.id/index.php/ksa/article/view/24334} }
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