2-DIMENSIONAL SNS2 AG 1 AU 1 GREEN PHOTOCHEMISTRY 1 LIGHT PHOTOCATALYTIC ACTIVITY 1 METHYLENE-BLUE 1 NANOSTRUCTURES 1 PERFORMANCE 1 REDUCTION 1 SILVER NANOPARTICLES 1 light-assisted synthesis 1 methylene blue 1 nanosheets morphology 1 photo-degradation 1 photochemical synthesis 1 sunlight response 1 tin di/sulfide 1 two-dimensional materials 1 water pollutant 1