Enhanced photocatalytic degradation of organic pollutants by Ag–TiO2 loaded cassava stem activated carbon under sunlight irradiation

Ultrafine Ag Nanoparticles Anchored on Hollow S-Doped CeO2 Spheres for Synergistically Enhanced Tetracycline Degradation under Visible Light

“…According to previous research, this is because abundant Ag would serve as the recombination sites for charge carriers. 37,42 After the irradiation for 60 min, the ) and commercial CeO 2 (0.0014 min −1 ), respectively, which is likewise higher than that of the majority of the reported photocatalysts that are outlined in Table S3. The mineraliza-tion of TC after the photocatalytic reaction was assessed by the total organic carbon (TOC) measurements (Figure S8).…”

“…The degradation efficiency initially improved with increasing loading amounts of Ag; however, further increasing the Ag content led to decreased photocatalytic activity. According to previous research, this is because abundant Ag would serve as the recombination sites for charge carriers. , After the irradiation for 60 min, the photodegradation efficiency of TC for commercial CeO 2 is only 17.1% and increases to 45.3% for CeO 2– x S x . The optimized 3Ag/CeO 2– x S x composite displays the highest TC photodegradation efficiency of up to 94.2%.…”

“…It is worth noting that 3Ag/ CeO 2−x S x composites displayed a wide absorption band in the region of 470−750 nm with its center at ∼558 nm, which is aroused by the SPR absorption of Ag species. 25,37 Obviously, the introduction of Ag nanoparticles can effectively promote light utilization and facilitate more charge carrier generation. In addition, the optical band gap energy of 3Ag/CeO 2−x S x and CeO 2 is estimated to be 2.52 eV and 2.91 through the Tauc plot (Figure S4), respectively, which is similar to previous reports.…”

“…In Figure c, CeO 2– x S x shows an evident red shift of the absorption edge compared to CeO 2 , suggesting that incorporation of the S element can narrow the band gap, whereas the onset absorption of 3Ag/CeO 2– x S x was not altered after introducing Ag nanoparticles. It is worth noting that 3Ag/CeO 2– x S x composites displayed a wide absorption band in the region of 470–750 nm with its center at ∼558 nm, which is aroused by the SPR absorption of Ag species. , Obviously, the introduction of Ag nanoparticles can effectively promote light utilization and facilitate more charge carrier generation. In addition, the optical band gap energy of 3Ag/CeO 2– x S x and CeO 2 is estimated to be 2.52 eV and 2.91 through the Tauc plot (Figure S4), respectively, which is similar to previous reports. , The electronic band structures of the materials were disclosed by the Mott–Schottky plots.…”

Synthesis and investigation on synergetic effect of activated carbon loaded silver nanoparticles with enhanced photocatalytic and antibacterial activity

“…Due to their unique physical, chemical, and biological characteristics as well as their potential for use in photocatalytic antibacterial applications, nanostructured materials have received a lot of attention recently. This is especially true of metallic nanoparticles and the metal oxides that correspond to them, such as copper [16], silver [17], titanium oxide [18], and zinc oxide [19]. By impregnating activated carbon with silver or metallic oxides, it is possible to create a material having antibacterial properties [20,21].…”