High-pressure modified mesoporous Zr-BTB nanosheets with enhanced photocatalyst activity

In this paper, a porous two-dimensional [email protected] composite photocatalyst driven by visible light was successfully synthesized by CO2 expansion liquid in supercritical system, which can degrade methylene blue rapidly and stably compared with ordinary [email protected] composite photocatalyst. The structure and morphology analysis show that the modified Zr-BTB nanosheet can form an optimal nanosheet with 17.8 nm aperture and 1.6 nm thickness. The XRD and Raman spectra showed that CdS was loaded on the nanosheets. The photocurrent, EIS, UV–vis DRS and PL spectra illustrate that [email protected](7 MPa) has a strong photoelectric effect. The degradation rate of two-dimensional [email protected] composite photocatalyst can reach 98% under light, and the photocatalytic efficiency remains at 82.15% after 5 photocatalytic cycles. The density functional theory analysis shows that the electron cloud distribution between CdSNPs and Zr-BTB is beneficial to the transformation of organic pollutants under visible light irradiation.