Transformation of CuS/ZnS nanomaterials to an efficient visible light photocatalyst by ‘photosensitizer’ graphene and the potential antimicrobial activities of the nanocomposites

Template-free synthesis of Mn2+ doped hierarchical CuS yolk–shell microspheres for photocatalytic reduction of Cr(vi)

“…CuS is a direct bandgap semiconductor material, which is well documented. 54,55 The E g value of CuS can be calculated according to Tauc's formula: (αhν) 2 = A(hν − E g ), where α, hν and A are the absorption coefficient, discrete photon energy and constant, respectively. The (αhν) 2 -hν curves of FL CuS and YS Mn-CuS are given in Fig.…”

Exploration of photoreduction ability of reduced graphene oxide–cadmium sulphide hetero-nanostructures and their intensified activities against harmful microbes

“…Literature surveys exhibit that the band gap of the RGO-CdS nanocomposites becomes narrower compared to the pure CdS with increasing RGO content [47,51] and also there are some reports about the enhancement of bang gap values with the increase of the RGO content in the nanocomposites [52]. This is because of the fact that the photocatalytic mechanism follows different plausible mechanism paths [21] and also the stability of the nanocomposites, i.e., nature of interaction between nanoparticles and graphene sheet [53] on which the optical property depends. The estimated values of band gap energy are 2.77, 2.5, and 2.89 eV for the samples CG_0.3, CG_0.6, and CG_1 respectively which are quite larger than that of bulk CdS.…”

“…Among the various chemical methods, the construction of nanomaterials with ability to reduce or remove Cr(VI) toxicity from aqueous solution has become a challenging issue to the researchers. To date, a variety of strategies have been made to synthesize different nanomaterials for removing toxic ions from aqueous solutions, such as forming smaller nanomaterials [16,17], combining of nanomaterials with carbon-based nanostructures [18,19] and synthesizing hybrid nanocomposites [20,21]. But semiconductor-based photocatalysts, including the design of photocatalysts with increasing surface area [22][23][24][25] are a challenging issue in scientific research era.…”

Delicate Design of ZnS@In2S3 Core–Shell Structures with Modulated Photocatalytic Performance under Simulated Sunlight Irradiation

“…Modulating the morphology and structure of ZnS nanomaterials would be an efficient way to increase the active sites and regulate the migration of photoinduced charge carriers. − Furthermore, the photocatalytic efficiency could be noticeably enhanced by adjusting the band gap of the photocatalysts, which could optimize their activity and light utilization efficiency during the degrading process. − Many researchers have made efforts to improve the photocatalytic activity of ZnS. Das et al prepared a kind of CuS/ZnS (CZS) nanoparticles (NPs) that grew on graphene sheets through a simple and green synthesis. By comparison, the visible light photocatalytic activity of CuS/ZnS graphene (CZSG) nanocomposites for the degradation of methylene blue was significantly enhanced.…”

“… 32 − 34 Many researchers have made efforts to improve the photocatalytic activity of ZnS. Das et al 35 prepared a kind of CuS/ZnS (CZS) nanoparticles (NPs) that grew on graphene sheets through a simple and green synthesis. By comparison, the visible light photocatalytic activity of CuS/ZnS graphene (CZSG) nanocomposites for the degradation of methylene blue was significantly enhanced.…”