Department of Chemistry, Faculty of Mathematics and Natural Sciences, Tanjungpura University, Pontianak, Indonesia
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@article{JKSA38822, author = {Imelda Silalahi and Risya Sasri and Peni Peni and Titin Zaharah}, title = {Bandgap Energy of TiO2/M-Curcumin Material (M = Na+, Mg2+, Cu2+)}, journal = {Jurnal Kimia Sains dan Aplikasi}, volume = {25}, number = {1}, year = {2022}, keywords = {curcumin; TiO2; bandgap energy; Tauc plot method}, abstract = {Bandgap energy ( E gap ) of TiO 2 /curcumin as well as TiO 2 /M-curcumin (M = Na + , Mg 2+ , Cu 2+ ) was determined. The material was prepared on transparent conductive oxide as TiO 2 film. Then, the curcumin and curcumin derivatives were adsorbed on TiO 2 surface by immersing the film in solution of the compounds. The diffuse reflectance UV-Vis spectra of the materials were recorded and utilized to calculate the E gap using the Tauc plot method. The calculation gave the E gap of TiO 2 of 3.27 eV that lowers after being deposited with curcumin and metal-curcumin compounds. The E gap of TiO 2 /curcumin was 2.82 eV, while TiO 2 /Na + -curcumin, TiO 2 /Mg 2+ -curcumin, and TiO 2 /Cu 2+ -curcumin were 2.36, 3.11, and 2.15 eV, respectively. Curcumin metal complexes, i.e., TiO 2 /Cu 2+ -curcumin, showed high molar absorptivity and effectively deposited on the TiO 2 lowers the bandgap energy of TiO 2 compared to free-curcumin on TiO 2 .}, issn = {2597-9914}, pages = {1--6} doi = {10.14710/jksa.25.1.1-6}, url = {https://ejournal.undip.ac.id/index.php/ksa/article/view/38822} }
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