Synthesis of (Ag,F)-modified anatase TiO₂ nanosheets and their enhanced photocatalytic activity

Abstract

The strong interactions between Ag nanoparticles and TiO2 nanosheets can improve the photocatalytic activity of TiO2 nanosheets.

Effects of Initial Nitrate Concentrations and Photocatalyst Dosages on Ammonium Ion in Synthetic Wastewater Treated by Photocatalytic Reduction

“…It was confirmed that Ag was effectively deposited on the surface of TiO 2 nanopowder. Specifically, Ag + ions were adsorbed onto the crystal structure of TiO 2 and subsequently formed Ag-TiO 2 [28,29].…”

Nanoplasmonically Engineered Interfaces on Amorphous TiO2 for Highly Efficient Photocatalysis in Hydrogen Evolution

“…Although the chemical constitutions in the series of as-prepared Ag/TiO 2 composites are expected to be similar, their colors are significantly different from each other in indoor natural light (Figure ), and presumably depend on the LSPR effect that is related to the chemical surroundings of Ag NPs and the interface interactions between a-TiO 2 and Ag NPs. , To rationalize the observation, the contents of organic residues and Ag metal on Ag/TiO 2 composites were, respectively, analyzed by TGA, Fourier transform infrared spectroscopy (FT-IR), and ICP-MS techniques. In each TGA curve (Figure A), there is a significant mass loss at about 273 °C.…”

“…It is well known that the resonance frequency of LSPR strongly depends on the particle size, shape, composition, refractive index of the surrounding medium, and interparticle spacing. ,, Hence, the LSPR-induced rate enhancements in the composite photocatalysis depend on the geometric arrangements of noble-metal NPs and semiconductor in addition to their optical properties. Several strategies have been developed to synthesize the composite photocatalysts, including chemical reduction, light-induced reduction, photodeposition, thermal decomposition, liquid impregnation, sol–gel, or hydrothermal method. ,,− To obtain plasmonic-metal/semiconductor composites with a high photocatalytic activity, however, there are still great challenges in the controlled synthesis of the composites in which the building blocks are suitably arranged and critically separated by nonconductive organics with optimal spacing to depress the decay process of irradiation energy …”

“…20−26 It is well known that the resonance frequency of LSPR strongly depends on the particle size, shape, composition, refractive index of the surrounding medium, and interparticle spacing. 15,27,28 Hence, the LSPR-induced rate enhancements in the composite photocatalysis depend on the geometric arrangements of noble-metal NPs and semiconductor in addition to their optical properties. Several strategies have been developed to synthesize the composite photocatalysts, including chemical reduction, light-induced reduction, photodeposition, thermal decomposition, liquid impregnation, sol− gel, or hydrothermal method.…”