TiO2 nanotube arrays sensitized by copper (II) porphyrins with efficient interfacial charge transfer for the photocatalytic degradation of 4-nitrophenol

Two-Dimensional Cu-Porphyrin Metal–Organic Framework Nanosheet-Supported Flaky TiO2 as an Efficient Visible-Light-Driven Photocatalyst for Dye Degradation and Cr(VI) Reduction

“…The high-resolution XPS signals are shown in Figure b–f. The XPS signal of the Ti element (Figure b) is fitted with two typical diffraction peaks at 459.0 and 464.7 eV, which are assigned to Ti 2p3/2 and Ti 2p1/2 in the 2D CuMOF-Ti-3 composite, respectively . The O 1s peak that appeared at 530.5 eV belongs to the Ti–O bond of TiO 2 , and at 531.9 eV originated from the O–H bond (Figure c) .…”

“…26−28 Cu-(II) meso-tetra(4-carboxyphenyl) porphyrin-modified TiO 2 nanotube arrays were utilized for the photocatalytic degradation of 4-nitrophenol, and the degradation rate reached 95% within 4 h of visible light irradiation. 29 However, porphyrin molecules are easily desorbed from the surface of TiO 2 in the photocatalysis reaction, thus reducing its photocatalytic activity and stability. The porphyrin-based MOFs have the dual characters of porphyrin and MOFs.…”

“…Porphyrin is a good photosensitizer with high light trapping ability, long excited state lifetime, and good stability . There are many reports about the application of porphyrin- or metalloporphyrin-sensitized TiO 2 in photocatalysis. − Cu­(II) meso-tetra­(4-carboxyphenyl) porphyrin-modified TiO 2 nanotube arrays were utilized for the photocatalytic degradation of 4-nitrophenol, and the degradation rate reached 95% within 4 h of visible light irradiation . However, porphyrin molecules are easily desorbed from the surface of TiO 2 in the photocatalysis reaction, thus reducing its photocatalytic activity and stability.…”

Designed a hollow Ni2P/TiO2 S-scheme heterojunction for remarkably enhanced photoelectric effect for solar energy harvesting and conversion

“…28 In addition, compared to nanoparticles, nanonetworks and nanospheres, TiO 2 nanotubes can enhance the rapid separation of photogenerated carriers. 29–31 However, TiO 2 can only capture and convert UV light (only 5% of solar energy), and photogenerated electrons and holes are easily recombined. 32–34 Therefore, to further enhance solar energy capture and the utilization of the TiO 2 , it is particularly important to properly use heterojunctions based on the hollow structures of TiO 2 .…”

Horseradish Peroxidase‐Coupled Ag3PO4/BiVO4 Photoanode for Biophotoelectrocatalytic Degradation of Organic Contaminants

“…[5] Some researchers revealed that 4-NP might do damage to the central nervous system of living organisms, and even cause hemochromatosis. [6] Thus, many strategies including adsorption, [7] microbiological process, [8] electrochemical oxidation [9] and photodegradation [10] have been explored to remove 4-NP from wastewater. However, these processes usually have some problems such as high energy consumption, secondary pollution and low efficiency.…”