In situ construction of a 2D/2D heterostructured ZnIn₂S₄/Bi₂MoO₆Z-scheme system for boosting the photoreduction activity of Cr(vi)

Abstract

The direct 2D/2D Z-scheme heterostructures of ZnIn2S4/Bi2MoO6 were rationally constructed by growing ZnIn2S4 ultrathin nanoflakes on the surface of Bi2MoO6 nanosheets, in situ, towards photocatalytic Cr(VI) reduction. After the tight...

Hierarchical S-Scheme Heterostructure of CdIn2S4@UiO-66-NH2 toward Synchronously Boosting Photocatalytic Removal of Cr(VI) and Tetracycline

“…Conversely, the decrease of binding energy is derived from the atom obtaining electrons. 45,46 Thereby, these results of XPS well elucidate that electrons in CIS transfer to U66N across the heterointerface between CIS and U66N due to the presence of electronic interactions at the interface after their intimate contact. Taken together, the characterization results above convincingly corroborate the successful fabrication of the CIS@U66N hierarchical heterostructure, which affords abundant active sites, beneficial for improving the photocatalytic efficiency.…”

Simultaneously enhanced photocatalytic cleanup of Cr(vi) and tetracycline via a ZnIn2S4 nanoflake-decorated 24-faceted concave MIL-88B(Fe) polyhedron S-scheme system

“…4,26 The obvious characteristic peaks of M88B in all the M88B@ZIS hybrids can be observed, indicating the preserved crystal structure of M88B following the addition of ZIS, while we can't find those of pure ZIS, likely due to the poor crystallinity and small loading of ZIS. 4,26 The FTIR spectra of these samples are shown in Fig. 1b, and their bands at 3000–3600 cm −1 are due to the stretching vibrations of hydroxyl groups of surface-adsorbed water.…”

“…45 After coupling M88B with ZIS, the UV-visible absorption spectra of the M88B@ZIS hybrids undergo a slight blue shift relative to that of M88B, possibly due to their strong interfacial interaction. 4 Fig. S3b † shows the Kubelka-Munk transformed spectra of M88B and ZIS.…”

“…1,2 Hexavalent chromium (CrIJVI)), a familiar heavy metal, derived from leather tanning, wood preservation, the steel fabrication industry, etc., exhibits hypertoxicity, mutagenicity, carcinogenicity, and high mobility in wastewater. 3,4 Trivalent chromium CrIJIII) is low toxicity, and easily eliminated as solids of chromic hydroxide, and thus CrIJVI) reduction into CrIJIII) would be a viable strategy towards removing CrIJVI). 3,4 Meanwhile, tetracycline (TC), a broad-spectrum antibiotic, is widely used for preventing and treating epidemics in the stockbreeding and aquacultural industry.…”

“…3,4 Trivalent chromium CrIJIII) is low toxicity, and easily eliminated as solids of chromic hydroxide, and thus CrIJVI) reduction into CrIJIII) would be a viable strategy towards removing CrIJVI). 3,4 Meanwhile, tetracycline (TC), a broad-spectrum antibiotic, is widely used for preventing and treating epidemics in the stockbreeding and aquacultural industry. 5,6 Its abuse inevitably causes its long-term accumulation in surface water and groundwater environments because of the features of high biological toxicity, difficult biological degradation and medicine tolerance, eventually resulting in severe water pollution.…”