Preparation method of nano composite MoS2/Ag/TiO2 NTs

Abstract

A preparation method of nano composite MoS2 / Ag / TiO2 NTs is characterized in that according to the principle, a titanium mesh is used as a base, and integrated MoS2 / Ag / TiO2 NTs is grown in situ on theTiO2 NTs / Ti mesh via simple photo-reduction and hydrothermal processes; when exposed to visible light (gamma> / =420 nm), the catalyst MoS2 / Ag / TiO2 NTs on the titanium mesh 4 cm<2> can substantially degrade 100 mL of 10 mg / L tetracycline hydrochloride solution within 2 hours. The preparation method has the advantages that the composite is prepared on the titanium mesh, the problem with catalyst immobilization is solved, the composite is convenient and quick to use and convenient to recycle and reuse, catalytic activity of the composite rarely fails, the composite may also be connected with an external circuit, and bias voltage helps improve photo-induced electron-hole separation efficiency so that catalytic efficiency of the composite is improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanocomposite materials, in particular to a kind of in-situ growth of MoS on titanium mesh 2 / Ag / TiO 2 NTs approach and photocatalytic degradation of antibiotic pollutant-tetracycline hydrochloride. Background technique [0002] As a widely studied nano-semiconductor photocatalyst, TiO 2 With the advantages of non-toxic, cheap and easy to obtain, high physical and chemical stability and high photocatalytic activity, it has attracted the attention of many researchers in the environmental field. Among them, TiO grown on titanium sheets by anodic oxidation 2 Nanotubes (TiO 2 Nanotubes, referred to as TiO 2 NTs) have the advantages of large specific surface area, vertical charge transfer, and stability against photocorrosion and chemical corrosion. However, the band gap of TiO2 NTs is 3.2 eV, which can only absorb ultraviolet light in sunlight, and its high photogenerated carrier recom...

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Problems solved by technology

However, the band gap of TiO2 NTs is 3.2 eV, which can only absorb ultraviolet light in sunlight, and its high photogenerated carrier recombination rate leads to its low photon quantum efficiency, and its catalytic oxidation activity under visible light is not high.

In addition, in the photocatalytic process, the backlight side of the titanium sheet cannot be excited by light, which is not conducive to the formation of TiO 2 The absorption and reflection of light by NTs are prone to scattering and cause the loss of photons

When TiO 2 When the length of NTs exceeds 10 microns, the adhesion on the titanium sheet is weak, and it is easy to fall off and break, and cannot be formed at will, and can only be kept in a flat state, which limits the formation of photocatalytic reaction devices.

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