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In this study, UiO-66-NH2 metal-organic framework (MOF) nanoparticles with peroxidase and oxidase mimetic activities were incorporated into the chitosan (CS) matrix by a simple and environmentally friendly method. The UiO-66-NH2/CS...

A ternary heterogeneous composite combining reduced graphene oxide (RGO), black titanium dioxide (B−TiO2) nanosheets and two dimensional ZIF‐8 sheets (2D‐ZIF‐8) was prepared. Under hydrothermal condition, B−TiO2 nanosheets and GO were tightly bound together, and meanwhile GO was reduced to RGO. Upon mixing with poly (vinyl pyrrolidone) (PVP)‐modified 2D‐ZIF‐8, the RGO/B−TiO2/2D‐ZIF‐8 ternary composite was obtained by PVP binding between B−TiO2 and 2D‐ZIF‐8. The introduction of 2D‐ZIF‐8 endowed the ternary composite a good adsorption capability of contaminant and followed degradation in situ at the site of adsorption. Owing to synergistic catalysis of oxygen vacancy and the formation of double heterogeneous interfaces, the prepared ternary composite had good visible light adsorption and rapid charge separation rate, which improved the photocatalytic performance. The rate constant of photocatalytic degradation of doxycycline hydrochloride and methylene blue by RGO/B−TiO2/2D‐ZIF‐8 was determined to be 0.0118 and 0.0232 min−1, respectively, which are 2.68 and 3.3 times that of B−TiO2. This study could provide deep insight for the design of high and bi‐functional activity catalysts based on the assembly of two‐dimensional sheet.

The construction of heterojunction between semiconductor is an effective technology to enhance its photocatalytic activity using solar energy. In this paper, a series of BiPO 4 /Bi 2 MoO 6 heterostructures with different mole ratio of Mo:P were successfully synthesized via one-pot solvothermal method. Photocatalytic activity of all samples were investigated by degrading methylene blue (MB) under visible light. Among the catalysts, BMoP-1-3 sample with oxygen vacancy has excellent photocatalytic activity due to improving its light harvesting and charge separation by establishment of Z-scheme system heterostructure, which is 1.65 and 1.22 times that of pure BiPO 4 and Bi 2 MoO 6 , respectively.

The construction of heterojunction, the loading of noble metals and introduction of oxygen vacancies are an effective technology to enhance catalyst photocatalytic activity using solar energy. In this paper, 3D Pt/CdS/h‐BiOBr microspheres were successfully synthesized by the method of solvothermal and multiple depositions. Photocatalytic activity of all samples was investigated by degrading methylene blue (MB) under visible light. Among the catalysts, 3D Pt/CdS/h‐BiOBr sample has excellent photocatalytic activity due to improving its light harvesting and charge separation by establishment of heterostructure, which is 1.17, 1.67 and 3.39 times of h‐BiOBr/CdS, h‐BiOBr and BiOBr, respectively