2 results about "Metal halides" patented technology

The invention discloses an inorganic sensitive layer based surface enhanced Raman spectrum detection technology and material preparation thereof. According to the detection technology, a surface enhanced Raman spectrum material based on an inorganic sensitive layer is used as an active substrate of a surface enhanced Raman scattering, and is exposed in the small molecule atmosphere; a new solid substance formed by specific reaction of the inorganic sensitive layer and small molecules to be detected by a Raman spectrometer is detected, and the type of the small molecules is obtained according to the Raman spectrum of the new solid substance; according to the preparation method, a colloid electrostatic self-assembly method, a thiourea-induced isotropic shell growth method, a metal halogenation method and a physical deposition method are used for a precious metal nanoparticle colloidal solution, a metal salt solution and a thiourea solution to prepare the material in which precious metalnanoparticles are coated with a metal oxide layer, or the precious metal nanoparticles are coated with a metal sulfide layer, or the precious metal nanoparticles are coated with a metal halide layer.The technology can be used for real-time online detection of hydrogen sulfide, carbon disulfide, hydrogen chloride, mustard gas, nitrogen dioxide and the like.

The invention belongs to the technical field of catalysts, and discloses a photocatalyst transition metal halide molten salt preparation method and application, a low-valence compound stable to air and water is used as a Ti source, transition metal halide is used as molten salt, the Ti source and the molten salt are mixed and ground according to a molar ratio, and a photocatalyst transition metal halide molten salt is obtained; and heating the transition metal halide in an air atmosphere until the temperature is not lower than the melting point of the molten salt, enabling the transition metal halide to be in a molten state, preserving heat, washing with water, and separating to obtain the reduction-state TiO2-x photocatalyst which is rich in Ti < 3 + > and Ov and has excellent visible light response capability. The obtained product has excellent visible light response performance, and the defects that multiple steps are needed for traditional defect-state titanium dioxide preparation, and flammable and explosive reducing gas or other dangerous reducing agents or oxidizing agents are used are overcome; and the adopted Ti source is stable to air and water, so that the defects of adopting an organic solvent and other easily-hydrolyzed Ti sources are completely avoided, and industrialization is facilitated.