Under dark and visible light: fast degradation of methylene blue in the presence of Ag–In–Ni–S nanocomposites

Abstract

5Ag-In-Ni-S nanocomposites of different shapes were productively achieved in water using thioacetamide at different temperatures in presence of SDS with uniform size distributions. It was found that variation of SDS and temperature had significant influence on morphology of Ag-In-Ni-S and their photocatalytic activity. The newly synthesized Ag-In-Ni-S nanocomposites were fully characterized by powder XRD, IR, UV-Vis, DRS, FE-SEM, TEM, EDX, XPS, BET and TGA. The catalytic activities were measured by 10 the degradation of methylene blue (MB) in absence and presence of visible light (sunlight, 100W tungsten lamp). The catalyst was found effective in degrading MB through generation of ROS that was confirmed using TA, DHR123 treatment and ESI mass spectroscopy. Removal efficiency of MB by the nanocomposites is very fast, nearly quantitative and repetitive upto five cycles. 75 2. Experimental 2.1 Material Silver acetate dihydrate [Ag(OAc)•2H 2 O], Indium acetate

Harvesting energy via stimuli‐free water/moisture dissociation by mesoporous SnO 2 –based hydroelectric cell and CuO as a pump for atmospheric moisture

“…[29][30][31][32][33] Figures 3A and 3B show the absorbance and fluorescence spectra of the TA in aqueous solution (black curve), which is in accordance with that reported by other researchers. TA is known to be a nonabsorber/fluorescent compound that forms 2-hydroxyl terephthalic acid (HTA) complex upon reaction with hydroxyl radicals.…”

CuMnOS Nanoflowers with Different Cu+/Cu2+ Ratios for the CO2-to-CH3OH and the CH3OH-to-H2 Redox Reactions

“…The quantity of MB amount (mg) divided by catalyst amount (mg), W 2,(MB) /W 1,(catalyst) , is used for evaluation. Ag-In-Ni-S nanocomposites with a W 2 /W 1 value of 0.0022 degraded 98% MB in 12 min41. NiS nanoparticles with a W 2 /W 1 value of 0.0089 degraded 100% MB in 15 min42.…”

Materials and Mechanisms of Photo‐Assisted Chemical Reactions under Light and Dark Conditions: Can Day–Night Photocatalysis Be Achieved?

“…[42] In this study,t he photocatalytic activity of the prepared materialw as investigated in the absence and presence of visible light (sunlight and 100 Wt ungsten lamp).N otably,t his material showed complete degradation of ag iven amount of dye under lamp and sunlight in 4a nd 2min, respectively,w hereas it took1 2min for complete degradation of the dye under dark conditions. [42] In this study,t he photocatalytic activity of the prepared materialw as investigated in the absence and presence of visible light (sunlight and 100 Wt ungsten lamp).N otably,t his material showed complete degradation of ag iven amount of dye under lamp and sunlight in 4a nd 2min, respectively,w hereas it took1 2min for complete degradation of the dye under dark conditions.…”

“…Interestingly,a nu nconventional material, AgÀInÀNiÀSn anocomposite, was proposed for the photocatalytic degradation of methylene blue (MB) dye molecules under visible-light and dark conditions. [42] In this study,t he photocatalytic activity of the prepared materialw as investigated in the absence and presence of visible light (sunlight and 100 Wt ungsten lamp).N otably,t his material showed complete degradation of ag iven amount of dye under lamp and sunlight in 4a nd 2min, respectively,w hereas it took1 2min for complete degradation of the dye under dark conditions. It is proposed that, in the AgÀInÀNiÀSn anocomposite, the electron-storage properties of silver help to shift the Fermi level of the composites towardm ore negative valuest hat make the PC more reductive.…”

“…Significant resultsf rom the photoinduced electron-storage mechanisms further led to the development of new and modified systems, such as TiO 2Àx N x /NiO bilayer thin films, [34] WO 3 , [35] TiO 2 -SWCNT (SWCNT = single-walled carbon nanotubes), [36] AgÀTiO 2 , [37] PtÀWO 3 ,C u II ÀWO 3 , [38] Ni(OH) 2 -coupled N-doped TiO 2 ,F e II ÀTiO 2 ,C u II ÀWO 3 ,P t ÀWO 3 , [39] hydrogen-treated PtÀ WO 3 , [40] Cu 2 O/TiO 2 , [41] AgÀInÀNiÀSn anocomposites, [42] H:PtÀ WO 3 /TiO 2 ÀAu nanospheres, [43] TiO 2 /SiO 2 /MnO x , [44] SnO 2 -decorated Cu 2 O, [45] TiO 2 ÀNiO/TiO 2 film, [46] graphitic carbon nitride (g-C 3 N 4 )/carbon nanotubes (CNTs)/graphene (Gr), [47] modified carbon nitride, [48] AuÀZnO, [49] Pt-loaded TiO 2 /CeO 2 /SiO 2 [50] AgÀ ZnO, [51] NÀTiO 2 , [52] metal-organic frameworks on Au/TiO 2 , [53] nickel sulfide, [54] Ag-modified PCs, [55] ZnO 2 /polypyrrole, [56] and Rh/Au-modified Al 2 O 3 , [57] and studied for their day-nightp hotocatalytic properties, as discussed in the following sections.…”